WO2018171694A1 - Information transmission method and apparatus - Google Patents
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- WO2018171694A1 WO2018171694A1 PCT/CN2018/080098 CN2018080098W WO2018171694A1 WO 2018171694 A1 WO2018171694 A1 WO 2018171694A1 CN 2018080098 W CN2018080098 W CN 2018080098W WO 2018171694 A1 WO2018171694 A1 WO 2018171694A1
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- the embodiments of the present invention relate to the field of communications technologies, and in particular, to an information transmission method and apparatus.
- a physical layer processing procedure of a physical downlink control channel (PDCCH) of a base station includes: performing channel coding, rate matching, scrambling, and modulation on original data bits by a base station. , cyclic shift, and resource mapping and other operations are sent out.
- PDCCH physical downlink control channel
- the present application provides an information transmission method and apparatus, which considers the influence of at least one of a beam pair scrambling operation and a cyclic shift operation, thereby improving system performance.
- the present application provides a scrambling method and apparatus.
- the scrambling method includes obtaining a scrambled bit sequence based on the beam indication information.
- the scrambled bit sequence may be a bit sequence obtained by scrambling any channel or data, which is not limited in this application.
- the beam is considered in the process of performing the scrambling operation, so that the PDCCH transmitted on different beams can be scrambled using different scrambling sequences, so that different beams can use different randomization techniques, so that The effect of randomization is improved, and the interference caused by the multi-beam base station to the neighboring area can be reduced.
- the scrambled bit sequence comprising: acquiring an initialization factor of the scrambling sequence according to the beam indication information. The scrambling sequence is then determined based on the initialization factor of the scrambling sequence. Then, according to the scrambling sequence, the scrambled bit sequence is scrambled to obtain a scrambled bit sequence.
- the optional implementation provides a manner of performing a scrambling operation according to the beam indication information, and the specific implementation is not limited thereto.
- the scrambling method includes generating an initialization factor associated with beam indication information, obtaining a scrambling sequence based on the initialization factor, and scrambling the scrambling sequence based on the scrambling sequence.
- the beam correlation information is fully considered in the process of scrambling using the scrambling sequence, so that different The beam can use different randomization techniques to improve the randomization effect and reduce the interference caused by the multi-beam base station to the neighboring area.
- the present application also provides a scrambling device, which can implement the above scrambling method.
- the scrambling device may be a chip (such as a baseband chip, or a communication chip, etc.) or a transmitting device (such as a base station, or a terminal, etc.).
- the above method can be implemented by software, hardware, or by executing corresponding software by hardware.
- the scrambling device comprises a processor and a memory.
- the processor is configured to support the apparatus to perform the corresponding function of the scrambling method described above.
- the memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device.
- the scrambling device may further comprise a communication interface for supporting communication between the device and other network elements.
- the communication interface can be a transceiver.
- the apparatus may include: a scrambling unit, configured to acquire the scrambled bit sequence according to the beam indication information.
- the scrambling unit is specifically configured to: obtain an initialization factor of the scrambling sequence according to the beam indication information. The scrambling sequence is then determined based on the initialization factor of the scrambling sequence. Then, according to the scrambling sequence, the scrambled bit sequence is scrambled to obtain a scrambled bit sequence.
- the present application provides a descrambling method and apparatus.
- the method includes descrambling the scrambled bit sequence based on the beam indication information.
- the technical solution corresponds to the scrambling method provided by the first aspect, and therefore the beneficial effects that can be achieved can be referred to the above, and are not described herein again.
- the execution body of the method may be a terminal device (such as a UE). If the scrambled bit sequence is applied to the uplink transmission process, the executor of the method may be a network device (e.g., a base station).
- the descrambling the scrambled bit sequence according to the beam indication information may include: acquiring an initialization factor of the scrambling sequence according to the beam indication information. The scrambling sequence is then determined based on the initialization factor of the scrambling sequence. Then, the scrambled bit sequence is descrambled according to the scrambling sequence.
- the optional implementation provides a method for descrambling the scrambled bit sequence according to the beam indication information, and the specific implementation is not limited thereto.
- the method includes generating an initialization factor associated with beam indication information, obtaining a scrambling sequence based on the initialization factor, and descrambling the sequence to be descrambled based on the scrambling sequence. Since the designation of the initialization factor makes the scrambling sequence consider the beam indication information, the randomization effect can be better improved and the interference can be reduced.
- the present application also provides a descrambling device, which can implement the above-described descrambling method.
- the descrambling device may be a chip (such as a baseband chip, or a communication chip, etc.) or a transmitting device (such as a base station, or a terminal, etc.).
- the above method can be implemented by software, hardware, or by executing corresponding software by hardware.
- the structure of the descrambling device includes a processor and a memory; the processor is configured to support the device to perform a corresponding function in the above scrambling method.
- the memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device.
- the descrambling device may further comprise a communication interface for supporting communication between the device and other network elements.
- the communication interface can be a transceiver.
- the descrambling device may include a descrambling unit, configured to descramble the scrambled bit sequence according to the beam indication information.
- the descrambling unit may be specifically configured to: first, obtain an initialization factor of the scrambling sequence according to the beam indication information. The scrambling sequence is then determined based on the initialization factor of the scrambling sequence. Then, the scrambled bit sequence is descrambled according to the scrambling sequence.
- the initialization factor of the scrambling sequence can be acquired according to the beam indication information, the cell information, and the slot number.
- the cell information may be a cell identifier (ID), or a cell index, information obtained based on a cell ID or a cell index, or information related to cell information.
- the slot number may be a slot number of a slot occupied when transmitting the scrambled bit sequence.
- acquiring an initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number may include: according to a formula Obtain the initialization factor c init of the scrambling sequence; where Indicates rounding down, n s is the slot number, Indicates a cell index, and offset represents a value associated with the beam indication information.
- the present application provides an information transmission method, and an execution body of the method may be a transmitting device.
- the method includes obtaining a scrambled bit sequence according to beam indication information. Then, the scrambled bit sequence is modulated and mapped to the time-frequency resource, and the scrambled bit sequence mapped to the time-frequency resource is transmitted through the beam indicated by the beam indication information.
- the transmitting device considers the beam in the process of performing the scrambling operation, and the explanation of the related content, the specific implementation manner of the related steps, and the beneficial effects can all refer to the description in the above-mentioned scrambling scheme.
- the beam indication information may be sent to the terminal device by using RRC signaling, MAC signaling, or DCI.
- an information transmission apparatus is further provided to implement the information transmission method of the third aspect.
- the device can be implemented by software, or hardware, or by hardware to execute corresponding software.
- the hardware or software includes one or more modules corresponding to the above functions.
- the apparatus may include: a scrambling unit, a mapping unit, and a sending unit.
- the scrambling unit is configured to obtain the scrambled bit sequence according to the beam indication information.
- a mapping unit configured to map the scrambled bit sequence to a time-frequency resource.
- the transmitting unit transmits the scrambled bit sequence mapped to the time-frequency resource by using the beam indicated by the beam indication information.
- the apparatus includes a processor, a memory, and a communication interface; the processor is configured to support the apparatus to perform a corresponding function in the method of the third aspect described above.
- the communication interface is used to support communication between the device and other network elements.
- the memory is for coupling to a processor that holds the program instructions and data necessary for the device.
- the communication interface may specifically be a transceiver.
- the present application provides an information transmission method, where an execution body of the method may be a receiving device, and the method may include: first, receiving, by using a beam, a mapped bit sequence that is mapped to a time-frequency resource;
- the scrambled bit sequence is a bit sequence determined according to beam indication information, and the beam indication information is used to indicate a beam. Then, from the time-frequency resource, the scrambled bit sequence is obtained. Finally, the scrambled bit sequence is descrambled according to the beam indication information.
- the terminal device considers the beam in the process of performing the descrambling operation, and the explanation of the related content, the specific implementation manner of the related steps, and the beneficial effects can refer to the descrambling method provided by the second aspect.
- beam indication information may be received through RRC signaling, MAC signaling, or DCI.
- an information transmission apparatus is further provided to implement the information transmission method of the third aspect.
- the device can be implemented by software, or hardware, or by hardware to execute corresponding software.
- the hardware or software includes one or more modules corresponding to the above functions.
- the apparatus may include: a receiving unit, an acquiring unit, and a descrambling unit.
- the receiving unit is configured to receive the scrambled bit sequence mapped to the time-frequency resource by using the beam, where the scrambled bit sequence is a bit sequence determined according to the beam indication information, and the beam indication information is used to indicate Beam.
- an obtaining unit configured to obtain the scrambled bit sequence from the time-frequency resource.
- a descrambling unit configured to descramble the scrambled bit sequence according to the beam indication information.
- the apparatus includes a processor, a memory, and a communication interface; the processor is configured to support the apparatus to perform a corresponding function in the method of the fourth aspect above.
- the communication interface is used to support communication between the device and other network elements.
- the memory is for coupling to a processor that holds the program instructions and data necessary for the device.
- the communication interface may specifically be a transceiver.
- the present application provides a cyclic shift method and apparatus.
- the cyclic shifting method includes: cyclically shifting the first symbol group according to beam indication information to obtain a second symbol group; wherein the first symbol group is a symbol obtained by modulating original data bits group.
- the base station considers the beam in the process of performing the cyclic shift operation, so that the symbol sequences obtained by cyclically shifting the PDCCHs transmitted on different beams may be different, so that PDCCHs transmitted on different beams may use different PDCCHs.
- the randomization technique can improve the effect of randomization and can reduce the interference caused by the multi-beam base station to the neighboring area.
- the technical solution can implement different scrambling sequences corresponding to any multiple beams, the scenario in which the base station uses the multiple beams to simultaneously transmit the PDCCH to the same terminal device may be used.
- Self-interference problem the problem that the base station uses multiple beams to sequentially transmit the PDCCH to the same terminal device may be solved, and the problem that the multiple beams are not fully utilized is caused.
- the cyclically shifting the first symbol group according to the beam indication information to obtain the second symbol group may include: cyclically shifting the first symbol group according to the beam indication information and the cell index to obtain a second symbol group.
- the cell index refers to a cell index of a cell where the terminal device is located.
- the present application also provides a cyclic shifting device, which can implement the above cyclic shifting method.
- the cyclic shifting device may be a chip (such as a baseband chip, or a communication chip, etc.) or a transmitting device (such as a base station, or a terminal, etc.).
- the above method can be implemented by software, hardware, or by executing corresponding software by hardware.
- the cyclic shifting device comprises a processor and a memory.
- the processor is configured to support the apparatus to perform the corresponding functions in the cyclic shifting method described above.
- the memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device.
- the cyclic shifting device may further comprise a communication interface for supporting communication between the device and other network elements.
- the communication interface can be a transceiver.
- the cyclic shifting apparatus may include: a cyclic shifting unit, configured to cyclically shift the first symbol group according to the beam indication information to obtain a second symbol group; wherein, the first A symbol group is a symbol group obtained by modulating original data bits.
- the cyclic shift unit may be specifically configured to cyclically shift the first symbol group according to the beam indication information and the cell index to obtain a second symbol group.
- the cell index refers to a cell index of a cell where the terminal device is located.
- the cyclically shifting the first symbol group according to the beam indication information and the cell index to obtain the second symbol group may include: according to the formula Obtaining a second symbol group; w(i) represents an ith element in the first symbol group, Represents the ith element in the second symbol group, Indicates a cell index, and offset represents a value associated with beam indication information.
- the present application provides a cyclic shift inverse operation method and apparatus.
- the method may include: performing a cyclic shift inverse operation on the second symbol group according to the beam indication information to obtain a first symbol group.
- the second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information
- the first symbol group is a symbol group obtained by modulating the original data bits.
- the present application also provides a cyclic shift inverse operation device.
- the above cyclic shift inverse operation method can be implemented.
- the cyclic shift inverse operation device may be a chip (such as a baseband chip, or a communication chip, etc.) or a receiving device (such as a base station, or a terminal, etc.).
- the above method can be implemented by software, hardware, or by executing corresponding software by hardware.
- the cyclic shift inverse operation device includes a processor and a memory.
- the processor is configured to support the apparatus to perform the corresponding functions of the cyclic shift inverse operation method described above.
- the memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device.
- the cyclic shift inverse operation device may further include a communication interface for supporting communication between the device and other network elements.
- the communication interface can be a transceiver.
- the cyclic shift inverse operation unit may include: a cyclic shift inverse operation unit, configured to perform a cyclic shift inverse operation on the second symbol group according to the beam indication information, to obtain the first symbol group.
- the second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information
- the first symbol group is a symbol group obtained by modulating the original data bits.
- performing a cyclic shift inverse operation on the second symbol group according to the beam indication information, to obtain the first symbol group may include: cyclically shifting the second symbol group according to the beam indication information and the cell index. Inverse operation, the first symbol group is obtained.
- performing a cyclic shift inverse operation on the second symbol group according to the beam indication information and the cell index, to obtain the first symbol group which may include: according to a formula Obtaining a first symbol group; wherein Representing the i-th element in the second symbol group, w(i) representing the i-th element in the first symbol group, Indicates a cell index, and offset represents a value associated with beam indication information.
- the present application provides an information transmission method and apparatus, where an execution body of the method may be a transmitting device (for example, a base station), and the method may include the following steps: First, performing a first symbol group according to beam indication information Cycling shifts to obtain a second symbol group; wherein the first symbol group is a symbol group obtained by modulating original data bits. Second, the second symbol group is mapped to the time-frequency resource. Finally, the second symbol group mapped to the time-frequency resource is sent to the terminal device by using the beam indicated by the beam indication information.
- the beam is considered in the process of performing the cyclic shift operation, and the explanation of the related content, the specific implementation manner of the related steps, and the beneficial effects can all refer to the above cyclic shift method.
- the method may further include: sending, by using RRC signaling, MAC signaling, or DCI, beam indication information to the terminal device.
- an information transmission apparatus which can implement the information transmission method described in the seventh aspect.
- the device may be a transmitting device (such as a base station, or a terminal, etc.).
- the above method can be implemented by software, hardware, or by executing corresponding software by hardware.
- the information transmission device includes a processor and a memory.
- the processor is configured to support the apparatus to perform the corresponding functions of the method of the seventh aspect described above.
- the memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device.
- the information transmission device may further include a communication interface for supporting communication between the device and other network elements.
- the communication interface can be a transceiver.
- the information transmission apparatus includes: a cyclic shift unit, a mapping unit, and a sending unit.
- the cyclic shift unit is configured to cyclically shift the first symbol group according to the beam indication information to obtain a second symbol group, where the first symbol group is a symbol group obtained by modulating the original data bits.
- a mapping unit configured to map the second symbol group to the time-frequency resource.
- a sending unit configured to send, by using a beam indicated by the beam indication information, a second symbol group mapped to the time-frequency resource to the terminal device.
- the present application provides an information transmission method and apparatus, and an execution body of the method may be a receiving device (for example, a terminal), and the method may include the following steps: First, receiving a mapping sent by a beam to a time-frequency resource a second symbol group, wherein the second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information, where the first symbol group is a symbol group obtained by modulating the original data bits, and the beam group The indication information is used to indicate the beam. Obtain a second symbol group from the time-frequency resource. Performing a cyclic shift inverse operation on the second symbol group according to the beam indication information to obtain a first symbol group.
- the terminal device considers the beam in the process of performing the cyclic shift inverse operation, and the explanation of the related content, the specific implementation manner of the related steps, and the beneficial effects can all refer to the cyclic shift inverse operation method.
- an information transmission apparatus which can implement the information transmission method described in the eighth aspect.
- the device can be a receiving device (such as a base station, or a terminal, etc.).
- the above method can be implemented by software, hardware, or by executing corresponding software by hardware.
- the information transmission device includes a processor and a memory.
- the processor is configured to support the apparatus to perform the corresponding functions of the method of the above eighth aspect.
- the memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device.
- the information transmission device may further include a communication interface for supporting communication between the device and other network elements.
- the communication interface can be a transceiver.
- the information transmission apparatus includes a receiving unit, an acquiring unit, and a cyclic shift inverse operating unit.
- the receiving unit is configured to receive the second symbol group mapped to the time-frequency resource by using the beam, where the second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information, where The first symbol group is a symbol group obtained by modulating original data bits, and beam indication information is used to indicate a beam.
- An obtaining unit configured to acquire a second symbol group from the time-frequency resource.
- a cyclic shift inverse operation unit configured to perform a cyclic shift inverse operation on the second symbol group according to the beam indication information, to obtain a first symbol group.
- the optional receiving unit may be further configured to receive beam indication information by using RRC signaling, MAC signaling, or DCI.
- an information transmission apparatus comprising
- a scrambling unit configured to obtain the scrambled bit sequence according to the beam indication information
- mapping unit configured to map the scrambled bit sequence to a time-frequency resource
- a sending unit configured to send, by using the beam indicated by the beam indication information, the scrambled bit sequence mapped to the time-frequency resource to the terminal device.
- the scrambling unit is specifically used to:
- the scrambling bit sequence is scrambled according to the scrambling sequence to obtain a scrambled bit sequence.
- the scrambling unit is configured to: when acquiring an initialization factor of the scrambling sequence according to the beam indication information, specifically:
- the initialization factor of the scrambling sequence is obtained according to the beam indication information, the cell index, and the slot number.
- the scrambling unit when the scrambling unit performs the initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number, it is specifically used to:
- n s is the slot number
- offset represents a value associated with the beam indication information.
- the sending unit is further configured to: send the beam indication information to the terminal device by using radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
- an information transmission apparatus comprising:
- a receiving unit configured to receive, by using a beam, a mapped bit sequence that is mapped to a time-frequency resource; wherein the scrambled bit sequence is a bit sequence determined according to beam indication information, where the beam indication information is used by Indicating the beam;
- An acquiring unit configured to acquire the scrambled bit sequence from the time-frequency resource
- a descrambling unit configured to descramble the scrambled bit sequence according to the beam indication information.
- the descrambling unit is specifically configured to:
- the descrambling unit is configured to: when performing the initializing factor of the scrambling sequence according to the beam indication information, specifically:
- An initialization factor of the scrambling sequence is obtained according to the beam indication information, the cell index, and the slot number.
- the descrambling unit is configured to: when performing the initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number, specifically:
- n s is the slot number
- offset represents a value associated with the beam indication information.
- the receiving unit is further configured to: receive the beam indication information by using radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
- an information transmission apparatus comprising:
- a cyclic shifting unit configured to cyclically shift the first symbol group according to the beam indication information to obtain a second symbol group; wherein the first symbol group is a symbol group obtained by modulating the original data bits;
- mapping unit configured to map the second symbol group to a time-frequency resource
- a sending unit configured to send, by using the beam indicated by the beam indication information, the second symbol group mapped to the time-frequency resource to the terminal device.
- the cyclic shift unit is specifically configured to cyclically shift the first symbol group according to the beam indication information and the cell index to obtain a second symbol group.
- the cyclic shift unit performs cyclic shifting on the first symbol group according to the beam indication information and the cell index to obtain a second symbol group, specifically for:
- w(i) represents an ith element in the first symbol group, Representing the i-th element in the second symbol group, Indicates a cell index, and offset represents a value associated with the beam indication information.
- the sending unit is further configured to: send the beam indication information to the terminal device by using radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
- an information transmission device characterized in that the device comprises:
- a receiving unit configured to receive a second symbol group that is transmitted by using a beam to be mapped to a time-frequency resource, where the second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to beam indication information, where The first symbol group is a symbol group obtained by modulating original data bits, and the beam indication information is used to indicate the beam;
- An acquiring unit configured to acquire the second symbol group from the time-frequency resource
- a cyclic shift inverse operation unit configured to perform a cyclic shift inverse operation on the second symbol group according to the beam indication information, to obtain the first symbol group.
- the cyclic shift inverse operation unit is specifically configured to perform a cyclic shift inverse operation on the second symbol group according to the beam indication information and a cell index, to obtain the first symbol group.
- the cyclic shift inverse operation unit performs a cyclic shift inverse operation on the second symbol group according to the beam indication information and the cell index, to obtain the first symbol.
- groups it is specifically used to:
- the receiving unit is further configured to: receive the beam indication information by using radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
- the beam indication information may include at least one of the following information: the relative number of the beam, the logical number of the beam, the physical number of the beam, based on any of the possible implementations provided by any of the aspects or any of the aspects provided above.
- the application also provides a computer storage medium having stored thereon a computer program (instruction) for performing the method of any of the above aspects.
- the application also provides a computer program product, when run on a computer, causing the computer to perform the method of any of the above aspects.
- any of the devices or computer storage media or computer program provided above are used to perform the corresponding methods provided above, and therefore, the beneficial effects that can be achieved can be referred to the corresponding correspondence provided above. The beneficial effects of the method are not repeated here.
- FIG. 1 is a schematic diagram of a process flow of a PDCCH by a base station in an LTE system provided by the prior art
- FIG. 2 is a schematic diagram of a process flow of a UE to a PDCCH in an LTE system according to the prior art
- FIG. 3 is a schematic diagram of a system architecture applicable to the technical solution provided by the embodiment of the present application.
- FIG. 4 is a schematic structural diagram of a network device according to an embodiment of the present application.
- FIG. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure.
- FIG. 6 is a schematic diagram of a scenario to which the technical solution provided by the embodiment of the present application is applicable.
- FIG. 7 is a schematic diagram of another scenario to which the technical solution provided by the embodiment of the present application is applicable.
- FIG. 8 is a schematic flowchart diagram of an information transmission method according to an embodiment of the present application.
- FIG. 9 is a schematic flowchart of a base station performing a scrambling operation according to an embodiment of the present disclosure.
- FIG. 9 is a schematic diagram of beam indication information according to an embodiment of the present disclosure.
- FIG. 9b is a schematic diagram of another beam indication information according to an embodiment of the present disclosure.
- FIG. 9c is a schematic diagram of another beam indication information according to an embodiment of the present disclosure.
- FIG. 9 is a schematic diagram of another beam indication information according to an embodiment of the present disclosure.
- FIG. 9 e is a schematic diagram of another beam indication information according to an embodiment of the present disclosure.
- FIG. 9 is a schematic diagram of another beam indication information according to an embodiment of the present disclosure.
- FIG. 9g is a schematic diagram of another beam indication information according to an embodiment of the present disclosure.
- FIG. 10 is a schematic flowchart diagram of another information transmission method according to an embodiment of the present disclosure.
- FIG. 11 is a schematic flowchart of a UE performing a descrambling operation according to an embodiment of the present disclosure
- FIG. 12 is a schematic flowchart diagram of another information transmission method according to an embodiment of the present disclosure.
- FIG. 13 is a schematic flowchart of a base station performing a cyclic shift operation according to an embodiment of the present disclosure
- FIG. 14 is a schematic flowchart diagram of another information transmission method according to an embodiment of the present disclosure.
- FIG. 15 is a schematic flowchart of a UE performing a cyclic shift inverse operation according to an embodiment of the present disclosure
- FIG. 16 is a schematic structural diagram of an information transmission apparatus according to an embodiment of the present application.
- FIG. 17 is a schematic structural diagram of another information transmission apparatus according to an embodiment of the present disclosure.
- FIG. 18 is a schematic structural diagram of another information transmission apparatus according to an embodiment of the present disclosure.
- FIG. 19 is a schematic structural diagram of another information transmission apparatus according to an embodiment of the present disclosure.
- FIG. 20 is a schematic structural diagram of another information transmission apparatus according to an embodiment of the present application.
- a radio frame includes 10 subframes, each of which has a length of 1 millisecond (ms), and each subframe includes two slots, each slot being 0.5 ms.
- the number of symbols included in each slot is related to the length of the cyclic prefix (CP) in the subframe. If the CP is a normal CP, each slot includes 7 symbols, and each subframe is composed of 14 symbols. For example, each subframe can be numbered by #0, #1, #2, #3,# 4, #5, #6, #7, #8, #9, #10, #11, #12, #13 symbol composition. If the CP is an extended CP, each slot includes 6 symbols, and each subframe is composed of 12 symbols.
- each subframe can be numbered by #0, #1, #2, #3,# 4, #5, #6, #7, #8, #9, #10, #11 symbol composition.
- symbol herein refers to an orthogonal frequency division multiplexing (OFDM) symbol.
- a PDCCH is typically transmitted on the first or first two or first three OFDM symbols of a subframe, which may be referred to as control symbols.
- control symbols For example, if the bandwidth of the LTE system is 1.4 megahertz (MHz), the PDCCH may be transmitted on the ⁇ 2, 3, 4 ⁇ OFDM symbols.
- a resource element is a minimum time-frequency resource unit.
- the RE may be uniquely identified by an index pair (k, l), where k is the subcarrier index and l is the symbol index.
- Four consecutive REs (where the RE occupied by the reference signal are not counted) constitute one resource element group (REG).
- the REG can be identified by an index pair (k', l').
- the basic unit of the time-frequency resource carrying the control channel is a control channel element (CCE).
- CCE contains 9 REGs.
- the PDCCH can be transmitted using different aggregation levels (AL).
- the aggregation level refers to how many CCEs the PDCCH carries.
- the aggregation level can be 1, 2, 4, 8.
- the aggregation level is 2, which means that the PDCCH is carried on two CCEs.
- the time-frequency resource corresponding to the symbol in which the PDCCH is located may also carry the following information: a reference signal (RS), and a physical control frame format indication channel ( Physical control formation indication channel (PCFICH), physical HARQ indication channel (PHICH); wherein HARQ is an abbreviation of hybrid automatic repeat request.
- RS reference signal
- PCFICH Physical control formation indication channel
- PHICH physical HARQ indication channel
- the PCFICH carries control format indication (CFI) information, and the CFI information is used to notify the user equipment (UE) of the number of symbols occupied by the control channel.
- CFI information can be used by the UE to calculate the total number of resources occupied by the control channel.
- the CFI information can also be used by the UE to determine the starting position of the data channel in the time domain, i.e. from the first few symbols is the data channel.
- the PCFICH is a broadcast channel. The base station will send the PCFICH on the first symbol of a subframe. The configuration of the PCFICH itself is notified by other signaling.
- the PHICH can be used to perform HARQ feedback of UE uplink data.
- PHICH is a multicast channel.
- the base station can transmit the PHICH on the first OFDM symbol of one subframe.
- the configuration of the PHICH itself is notified by a master information block (MIB) carried on a physical broadcast channel (PBCH).
- MIB master information block
- PBCH physical broadcast channel
- the total number of REGs corresponding to the symbols occupied by the control channel is determined by the number of symbols and the bandwidth.
- the total REG number is subtracted from the time-frequency resource occupied by the PCFICH and the PHICH, that is, the time-frequency resource that the PDCCH can use.
- two search spaces are defined in the LTE system, which are a common search space and a UE-specific search space.
- the aggregation level of the PDCCH may be 4, 8.
- the PDCCH aggregation level may be 1, 2, 4, 8.
- interference between cells is an important factor limiting performance.
- the interference between cells and the interference between base stations are no longer distinguished in the following.
- an OFDM-based cellular communication system such as LTE, 5G, etc.
- the inter-cell interference strength is large, and the interference source is difficult to determine, thereby affecting the reception performance of the receiving end.
- interference randomization techniques include interleaving, scrambling, cyclic shifting, and the like. That is to say, randomization can be understood as: when the intensity of the interference is large and the interference source is difficult to determine, the statistical method is used to make the interference "white noise”.
- a symbol group refers to a collection of a plurality of modulation symbols.
- the modulation symbol refers to a symbol obtained after modulation.
- the modulation mode is not limited in this application. For example, if the modulation mode is quadrature phase shift keying (QPSK) modulation, the modulation symbol refers to QPSK symbol; if the modulation mode is quadrature amplitude modulation (quadrature amplitude) Modulation, QAM), the modulation symbol refers to the QAM symbol.
- QPSK quadrature phase shift keying
- QAM quadrature amplitude modulation
- symbol in this application refers to an OFDM symbol or a modulation symbol.
- symbol sequence refers to a modulation symbol
- symbol group also refers to a modulation symbol.
- symbol in occupied symbol refers to an OFDM symbol.
- a beam is a communication resource.
- the beam can be a wide beam, or a narrow beam, or other type of beam.
- the beamforming technique can be beamforming techniques or other technical means.
- the beamforming technique may be specifically a digital beamforming technique, an analog beamforming technique, or a hybrid beamforming technique. Different beams can be considered as different resources.
- the same information or different information can be transmitted through different beams. Alternatively, multiple beams having the same or similar communication characteristics can be considered as one beam.
- One or more antenna ports may be included in one beam for transmitting data channels, control channels, sounding signals, and the like.
- a transmit beam may refer to a distribution of signal strengths that are formed in different directions of space after the signal is transmitted through the antenna.
- the receive beam may refer to a signal strength distribution of wireless signals received from the antenna in different directions in space. It can be understood that one or more antenna ports forming one beam can also be regarded as one antenna port set.
- the beam pair is built on the concept of the beam.
- a beam pair typically includes a transmit beam at the transmitter and a receive beam at the receiver. It should be noted that the “beam” in the following refers to the transmit beam of the base station, and the present invention does not limit the receive beam of the UE.
- first the terms “first”, “second”, etc. are used herein to distinguish different objects and are not intended to limit the order.
- first symbol group and the second symbol group are merely for distinguishing different symbol groups, and their order is not limited.
- FIG. 1 it is a schematic diagram of a process flow of a PDCCH by a base station in an LTE system, and specifically includes the following steps S101 to S113:
- the base station determines original data bits.
- the base station sends the PDCCH as an example in which the base station sends downlink control information (DCI) to the UE in the kth subframe.
- DCI downlink control information
- the original data bits are the DCI.
- S102 The base station adds a CRC to the original data bit, where the length of the CRC may be defined by a protocol.
- the bit sequence obtained by the base station after performing S102 can be expressed as: c 0 , c 1 , c 2 , c 3 , ..., c K-1 .
- K represents the length of the bit sequence obtained after adding the CRC.
- S103 The base station performs channel coding on the bit sequence obtained after adding the CRC.
- Channel coding is one of the most important components of a communication system and provides error detection and error correction for the transmission of information bits.
- the coding of the control channel may be a tail-biting convolutional coding (TBCC), and the encoding of the control channel in the 5G new radio (NR) may be a Polar code or the like. This application does not limit this.
- S104 The base station performs rate matching on the bit sequence obtained after channel coding.
- Rate matching refers to matching the number of bits that need to be transmitted (ie, the number of bits of the bit sequence obtained after channel coding) to the number of bits that the allocated resource can carry. Commonly used rate matching methods may include retransmission, truncation, puncturing, and the like.
- S105 The base station performs CCE aggregation on the bit sequence obtained after the rate matching.
- N REG represents the total number of REGs that the PDCCH can transmit, that is, the total number of REGs other than the REG occupied by the PHICH and the PCFICH.
- one PDCCH can be aggregated and transmitted in ⁇ 1, 2, 4, 8 ⁇ CCEs. 72 bits of information can be mapped on each CCE.
- the base station performs resource multiplexing on the bit sequence obtained by the CCE aggregation with other PDCCHs.
- the multiplexing refers to transmitting multiple PDCCHs on the same resource.
- the PDCCH may be the same PDCCH that is sent to the same UE as the PDCCH in S101, or may be a PDCCH that is sent to different UEs.
- bit sequence length of the i th PDCCH is And represent the bit sequence as Then, the bit sequence obtained after the base station performs resource multiplexing on the n PDCCH PDCCHs may be:
- this sequence is defined in this application as b(i), and the total length of b(i) is
- CCEn that is, the nth CCE
- the mapped bit sequence may be: b(72*n), b(72*n+1), ..., b(72*n+71). If there is a CCE that is not occupied, add ⁇ NIL>.
- S107 The base station scrambles the bit sequence obtained after resource multiplexing.
- Scrambling refers to modulo-adding another sequence (ie, the sequence of bits to be scrambled) with one sequence (ie, a scrambling sequence) to randomize interference between neighboring cells.
- scrambling is performed according to the following formula:
- the scrambling sequence c(i) may be a sequence associated with a cell ID (cell ID) and a slot number n s .
- the cell ID refers to the cell ID of the cell where the UE is located
- n s refers to the code of the slot used when transmitting the PDCCH.
- the initialization factor c init of the scrambling sequence c(i) is a value associated with the cell ID and the slot number n s . specific:
- S108 The base station modulates the bit sequence obtained after the scrambling.
- the modulation of the PDCCH is generally performed by using a QPSK modulation scheme, that is, two bits are modulated into one QPSK symbol, and the specific modulation method is not limited in this application. Obtained in S107 After modulation, a symbol sequence d(m) is obtained.
- S109 The base station performs layer mapping and precoding on the symbol sequence obtained after the modulation.
- precoding is an optional step, and for the sake of simplicity of the description, the specific examples below are described on the basis of not considering this step.
- This application does not limit the specific implementation of S109. Taking an antenna port as an example, the symbol sequence obtained by performing layer mapping and precoding on the symbol sequence d(m) is marked as y(m).
- S110 The base station interleaves and cyclically shifts the symbol sequence obtained after precoding.
- the interleaving and cyclic shifting operations are performed in units of quadruplets.
- a quadruple group z(i) ⁇ y(4i), y(4i+1), y(4i+2), y(4i+3)>.
- the quadruple sequence can be expressed as z(0), z(1), z(2), z(3).... Interleaving and cyclic shifting are performed on a quadruple sequence.
- the information obtained by the element z(i) in the quadruplet sequence is marked as w(i)
- the base station pairs the quadruplet sequence z(0), z( 1), z(2), z(3)...
- the obtained information can be marked as w(0), w(1), w(2), w(3)...
- the cyclic shift is related to the cell ID.
- the information obtained by the base station after performing the cyclic shift operation on the element w(i) in the quadruplet sequence is marked as then:
- M quad represents the number of quadruplets
- the base station performs resource mapping on the symbol sequence obtained after the cyclic shift according to the mapping rule of the frequency domain after the time domain.
- Resource mapping refers to mapping a sequence of symbols onto a time-frequency resource. Taking an antenna port as an example, resource mapping means Maps to the REG(k',l') corresponding to the port. In the LTE system, the mapping rule is a pre-time domain and a post-frequency domain. For example, taking the control channel to occupy 3 symbols as an example, the resource mapping may be specifically: the base station will Map to REG(0,0), will Map to REG(0,1), will Map to REG(0,2), will Map to REG(1,0)...
- the base station performs inverse fast fourier transform (IFFT) on the information mapped to the time-frequency resource.
- IFFT inverse fast fourier transform
- the QPSK symbols on the subcarriers are modulated into OFDM waveforms by IFFT.
- S113 The signal obtained by the base station after sending the IFFT to the UE, that is, the OFDM time domain signal.
- FIG. 2 it is a schematic diagram of a process flow of a UE to a PDCCH in an LTE system, where the UE receives the PDCCH in the kth subframe (ie, subframe k), and the modulation mode is a QPSK modulation mode.
- the method may include the following steps S201 to S209:
- the UE listens to the control channel in the subframe k.
- the signal monitored by the UE (that is, the signal received by the UE) is a wireless signal carried by the OFDM waveform, that is, an OFDM time domain signal.
- the UE performs fast Fourier transform (FFT) on the monitored signal.
- FFT fast Fourier transform
- the OFDM symbol can be transformed into a QPSK symbol to obtain a symbol sequence.
- S203 The UE deinterleaves and cyclically shifts the symbol sequence obtained after the FFT.
- the process of deinterleaving and cyclic shifting corresponds to S110, and can be considered as the inverse process of S110.
- S204 The UE demodulates the symbol sequence obtained after the cyclic shift.
- the symbol sequence can be changed to a bit sequence.
- the process of demodulation corresponds to S108 and can be considered as the inverse of S108.
- S205 The UE performs descrambling on the bit sequence obtained after demodulation.
- the process of descrambling corresponds to S107 and can be considered as the inverse of S107.
- S206 The UE performs blind detection on the bit sequence obtained by the descrambling.
- Blind detection refers to the location and aggregation level of the UE attempting to search all possible alternative PDCCHs in the space.
- the specific implementation manner of the blind detection is not limited in this application.
- the mth candidate PDCCH obtained by blind detection may be composed of the following CCEs:
- L is the aggregation level and can be ⁇ 1, 2, 4, 8 ⁇ .
- N CCE,k represents the number of CCEs used in the subframe k for outgoing control channels.
- i 0,...,L-1.
- m 0,...,M (L) -1.
- M (L) indicates the number of candidate PDCCHs when the aggregation level is L, and LTE specifies a search space dedicated to the UE.
- LTE specifies a search space dedicated to the UE.
- n RNTI represents a UE ID and is used to identify a UE.
- n CI is the carrier indication and is 0 in the case of a single carrier.
- n s is a radio frame slot number.
- S207 The UE performs rate de-matching on the candidate PDCCH obtained by the blind detection.
- the process of the rate matching process corresponds to S104, and can be considered as the inverse process of S104.
- S208 The UE performs channel decoding on the bit sequence obtained by the de-rate matching.
- S209 The UE performs CRC check on the bit sequence obtained by channel decoding.
- the UE determines whether the reception is correct by using the CRC check, that is, whether the candidate PDCCH obtained by blind detection in S206 is really the PDCCH sent to the UE. If unsuccessful, blind detection is performed to obtain the next candidate PDCCH until all candidate PDCCHs are traversed. If successful, the alternative PDCCH obtained by blind detection in S206 is the PDCCH transmitted to the UE.
- multiple beams can be used to transmit the PDCCH to one UE.
- Multiple beams may be used for communication between the UE and the base station simultaneously.
- robustness can be understood as stability or robustness and the like.
- LTE itself does not consider the beam-related information processing flow.
- multiple beams of the same base station use a similar randomization method when transmitting PDCCHs to the same UE. .
- multiple beams of the same base station will transmit the same PDCCH at the same frequency position, using the same interleaving method, using the same scrambling sequence and cyclic shift mode. This will reduce the effect of randomization and will cause the interference strength of the multi-beam base station to the neighboring area to become large.
- the interference intensity is proportional to the number of beams.
- a multi-beam base station refers to a base station that communicates with the same UE using multiple beams.
- the base station uses multiple beams to transmit a PDCCH to the same UE, if the foregoing process flow is still used, and the base station simultaneously uses multiple beams to transmit the PDCCH to the same UE, the information sent by the multiple beams is the same. If the correlation between the beams is not low enough, the multiple beams will generate self-interference, which will reduce the channel capacity.
- the base station uses multiple beams to transmit PDCCHs to the same UE
- the base station sequentially uses multiple beams to transmit PDCCHs to the same UE, for example, one symbol is transmitted using one beam.
- the frequency domain resources corresponding to the two symbols are identical. In this way, only the diversity in the airspace brought by the multiple beams is obtained, and the conditions of the multiple beams are not fully utilized.
- the present application provides an information transmission method and apparatus. Specifically, the effect of the beam on the information processing process is considered, thereby improving the randomization effect and reducing the interference strength of the multi-beam base station to the neighboring area. This process takes full advantage of the multi-beam condition. Moreover, optionally, in a scenario in which a base station simultaneously uses multiple beams to transmit a PDCCH to the same UE, self-interference between the multiple beams may be reduced, thereby enhancing channel capacity.
- the technical solution provided by the present application can be applied to the system architecture shown in FIG. 3.
- the system architecture shown in FIG. 3 includes a network device 100 and one or more terminal devices 200 connected to the network device 100.
- the network device 100 may be a device that can communicate with the terminal device 200.
- Network device 100 can be a base station, a relay station, or an access point, and the like.
- the base station may be a base transceiver station (BTS) in a global system for mobile communication (GSM) or a code division multiple access (CDMA) network, or may be a broadband code division.
- the NB (NodeB) in the wideband code division multiple access (WCDMA) may also be an eNB or an eNodeB (evolutional NodeB) in LTE.
- the network device 100 may also be a wireless controller in a cloud radio access network (CRAN) scenario.
- the network device 100 may also be a network device in a future 5G network or a network device in a future evolved PLMN network; it may also be a wearable device or an in-vehicle device or the like.
- the terminal device 200 may be a UE, an access terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a UE terminal, a terminal, a wireless communication device, a UE proxy, or a UE device.
- the access terminal may be a cellular phone, a cordless phone, a SIP (session initiation protocol) phone, a WLL (wireless local loop) station, a personal digital assistant (PDA), with wireless communication.
- the network device 100 is a base station
- the terminal device 200 is a UE as an example.
- the sending device may be a base station
- the receiving device is a terminal.
- the sending device is a terminal
- the receiving device is a base station.
- the base station may include an indoor baseband unit (BBU) and a remote radio unit (RRU), and the RRU and the antenna feeder system (ie, an antenna) are connected.
- BBU indoor baseband unit
- RRU remote radio unit
- the BBU and the RRU may be as needed. Take it apart.
- the mobile phone may include: a radio frequency (RF) circuit 110, a memory 120, other input devices 130, a display screen 140, a sensor 150, an audio circuit 160, an I/O subsystem 170, a processor 180, And components such as power supply 190.
- RF radio frequency
- FIG. 5 the structure of the mobile phone shown in FIG. 5 does not constitute a limitation on the mobile phone, and may include more or less components than those illustrated, or combine some components, or split some components, or Different parts are arranged.
- the display screen 140 belongs to a user interface (UI), and the display screen 140 can include a display panel 141 and a touch panel 142.
- the handset can include more or fewer components than shown.
- the mobile phone may also include functional modules or devices such as a camera and a Bluetooth module, and details are not described herein.
- the processor 180 is connected to the RF circuit 110, the memory 120, the audio circuit 160, the I/O subsystem 170, and the power supply 190, respectively.
- the I/O subsystem 170 is connected to other input devices 130, display 140, and sensor 150, respectively.
- the RF circuit 110 can be used for receiving and transmitting signals during and after receiving or transmitting information, and in particular, receiving downlink information of the base station and processing it to the processor 180.
- the memory 120 can be used to store software programs as well as modules.
- the processor 180 executes various functional applications and data processing of the mobile phone by running software programs and modules stored in the memory 120.
- Other input devices 130 can be used to receive input numeric or character information, as well as to generate key signal inputs related to user settings and function controls of the handset.
- the display screen 140 can be used to display information input by the user or information provided to the user as well as various menus of the mobile phone, and can also accept user input.
- Sensor 150 can be a light sensor, a motion sensor, or other sensor.
- the audio circuit 160 can provide an audio interface between the user and the handset.
- the I/O subsystem 170 is used to control external devices for input and output, and the external devices may include other device input controllers, sensor controllers, and display controllers.
- the processor 180 is the control center of the handset 200, which connects various portions of the entire handset using various interfaces and lines, by running or executing software programs and/or modules stored in the memory 120, and recalling data stored in the memory 120, The various functions and processing data of the mobile phone 200 are executed to perform overall monitoring of the mobile phone.
- a power source 190 (such as a battery) is used to power the various components described above.
- the power source can be logically coupled to the processor 180 through a power management system to manage functions such as charging, discharging, and power consumption through the power management system.
- the technical solution provided by the present application is particularly applicable to a 5G NR system.
- 5G NR in order to ensure the robustness of the control channel, multiple beams can be used to transmit the PDCCH to one UE.
- the technical solution provided by the present application is particularly applicable to a scenario based on multiple beams. There are two typical scenarios for transmitting one PDCCH using multiple beams.
- Scenario 1 A plurality of beams can be simultaneously used for communication between a UE and a base station. As shown in FIG. 6, the base station transmits a PDCCH to the UE using one control symbol (ie, control symbol 0), and simultaneously transmits the PDCCH using two beams (ie, beam 1 and beam 2).
- Scenario 2 The UE communicates with the base station using one beam at the same time. As shown in FIG. 7, the base station transmits PDCCH to the UE by using two control symbols (ie, control symbol 0 and control symbol 1), and transmits one control symbol on each beam, that is, transmits control symbol 0 on beam 1. The control symbol 2 is transmitted on the beam 2.
- FIG. 6 and FIG. 7 are only examples, which do not constitute a limitation of the scenario to which the technical solution provided by the present application is applicable.
- a base station can transmit a PDCCH on three or more control symbols.
- FIG. 8 is a schematic flowchart diagram of an information transmission method provided by an embodiment of the present application. It should be noted that FIG. 8 is an example in which a base station processes a PDCCH transmitted on one beam as an example. The method may include the following steps S301 to S312:
- S301 to S306 S101 to S106 may be referred to, and other methods may be used. The present invention does not limit this.
- the base station scrambles the bit sequence obtained by multiplexing the resources according to the identifier of the beam.
- the bit sequence obtained after resource multiplexing may be a bit sequence to be scrambled.
- S307 may include the following steps T1 to T3:
- T1 The base station acquires an initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number.
- Example according to the formula Determining the initialization factor of the scrambling sequence c init ; Indicates rounding down, n s is the slot number, Indicates a cell index, and offset represents a value associated with beam indication information.
- the cell index refers to the cell ID of the cell where the UE is located, and the slot number refers to the number of the slot used when transmitting the PDCCH.
- T2 The base station determines the scrambling sequence according to the initialization factor of the scrambling sequence.
- T3 The base station scrambles the scrambled bit sequence according to the scrambling sequence to obtain a scrambled bit sequence.
- T2 to T3 The specific implementation process of T2 to T3 is not limited in the embodiment of the present application.
- the base station and the UE may pre-agreed the correlation between the offset and the beam indication information. Specific examples thereof can be referred to below.
- the scrambling operation provided by the present application is related to beam indication information, each beam indication information is used to indicate one beam, and different beam indication information indicates different beams.
- Each beam can be indicated by one or more beam indication information, and different beams can be indicated by different beam indication information.
- the specific implementation manner of the beam indication information is not limited in this application. Several alternative methods are listed below:
- the beam indication information is the relative number of the beams.
- the base station uses two beams to transmit a PDCCH to the UE.
- the beam indication information is the logical number of the beam.
- Mode 3 The beam indication information is the physical number of the beam.
- the beam indication information is a port number.
- One beam can correspond to one or more port numbers. Therefore, the beam number corresponding to one beam can be used to indicate the beam.
- the beam indication information is quasi colocation (QCL) information.
- Quasi-co-location used to indicate that one or more identical or similar communication features exist between multiple resources.
- multiple resources with a parity relationship the same or similar communication configuration may be adopted.
- large-scale characteristics of the channel in which one port transmits one symbol can be inferred from the large-scale characteristics of the channel through which one symbol transmits one symbol.
- large-scale characteristics may include: delay spread, average delay, Doppler spread, Doppler shift, average gain, terminal equipment receive beam number, transmit/receive channel correlation, receive angle of arrival, receiver antenna space Relevance and so on.
- the resources of other signals transmitted on the beam transmitting the PDCCH can be used to indicate the beam.
- the signal may be a reference signal, such as a CSI-RS.
- the “resources” herein may include, but are not limited to, at least one of the following information: time-frequency resources, number of ports, periods, offsets, and the like.
- the base station sends a PDCCH to the UE using a certain beam, the base station transmits the CSI-RS using this beam. This is because the general base station needs to first send a CSI-RS to the UE to perform channel measurement; then, the channel measurement result is used to send the PDCCH to the UE. Based on this, the base station can know which beam or beams to use to transmit the PDCCH by the base station, as long as the base station notifies the UE of the port number and/or the resource number used by the CSI-RS.
- FIG. 9d it is a correspondence between CSI-RS resources and beams.
- the CSI-RS resource number may be a resource ID, or a resource ID+port ID.
- beam idx ⁇ 0, 1, ... ⁇ , where each number represents a CSI-RS resource
- offset beam Idx mod N, where N is a predefined or configurable integer.
- the beam indication information is beam pair link (BPL) information.
- the BPL information may be a BPL number or the like.
- beam idx ⁇ 0, 1, ... ⁇ , where each number represents a BPL, as shown in Figure 9e.
- the base station uses the beam pair 0 and the beam pair 1 to transmit the PDCCH to the UE.
- the beam indication information is a UE group.
- the UEs in one beam coverage form one UE group, each UE group may include one or multiple UEs, and one UE may belong to one or multiple UE groups.
- the UE group 1 corresponding to the beam 1 includes the UE1, the UE group 2 corresponding to the beam 2 includes the UE1 and the UE2, and the UE group 3 corresponding to the beam 3 includes the UE2.
- beam idx ⁇ 0, 1, ... ⁇ , where each number refers to one UE group
- the beam indication information is a time domain symbol.
- the time domain symbol refers to an OFDM symbol occupied when the beam is transmitted.
- This method is applicable to a scenario in which a base station transmits a PDCCH to a same UE on different symbols using multiple beams, and transmits a PDCCH to the UE using only one beam per symbol. As shown in FIG. 9g, the base station transmits a PDCCH to the UE using one beam at symbol 0, and transmits a PDCCH to the UE using another beam at symbol 1.
- the beam indication information may also be a combination of the at least two pieces of information, for example, in the foregoing manner 5 An example of this. Of course, it is not limited to the above information. This application is not listed one by one.
- the base station considers the beam when performing the scrambling operation, but the scrambling sequence corresponding to different beams is not limited in the present application. That is to say, the scrambling sequences corresponding to different beams may be the same or different.
- the beam of communication between the base station and the same UE may change with the movement of the UE.
- the present application does not limit the change rule of the used beam. In this case, therefore, the beam indication information is not a fixed value.
- the base station can notify the UE of the beam indication information by signaling.
- the order of execution of the steps in FIG. 8 is not limited in the embodiment of the present application. Alternatively, the step may be performed before S301.
- the signaling used to send the beam indication information may be a newly designed signaling, or may reuse one signaling in the prior art.
- the base station may send the beam indication information to the UE by using radio resource control (RRC) signaling, medium access control (MAC) signaling, or DCI.
- RRC radio resource control
- MAC medium access control
- DCI data convergence protocol
- the base station sends the beam indication information to the UE through RRC signaling or MAC signaling, which can be applied to a scenario where the beam change is slow.
- the base station sends the beam indication information to the UE through the DCI, which can be applied to a scenario in which the beam change is fast.
- S308 to S310 Reference may be made to the methods of S108 to S110 in the prior art, and other methods may be used. The present invention is not limited thereto.
- the base station performs resource mapping on the symbol sequence obtained after the cyclic shift according to the mapping rule of the time domain after the frequency domain.
- the mapping rule may be a pre-frequency domain post-time domain, thus avoiding occupying one beam in one beam.
- the UE in the beam direction cannot receive information transmitted on different beams due to the mapping rules in the frequency domain after the first time domain. It can be understood that if a beam occupies multiple symbols, the information transmitted by using the beam may be mapped according to the mapping rule of the time domain after the frequency domain, or may be mapped according to the mapping rule of the time domain after the frequency domain.
- resource mapping refers to Maps to the REG(k',l') corresponding to the port. Among them, about For a description, refer to S111 above.
- the base station may perform resource mapping on the symbol sequences corresponding to the two beams: Map to REG(0,0), will Map to REG(1,0), will Map to REG(2,0), will Map to REG(3,0)....
- Step S112 may be referred to, and other methods may be used, which are not limited by the present invention.
- the base station sends an OFDM time domain signal to the UE by using a beam indicated by the beam indication information.
- steps S301 to S313 may be optional steps.
- the order of execution of any two steps in S301 to S313 is not limited in the embodiment of the present application.
- the above S301 to S313 are examples of the processing procedure of the PDCCH transmitted by the base station on one beam.
- the base station may perform the above process multiple times.
- the base station considers the beam in the process of performing the scrambling operation, so that the PDCCHs transmitted on different beams can be scrambled using different scrambling sequences, so that different beams can use different randomization techniques, thereby The effect of randomization can be improved, and the interference caused by the multi-beam base station to the neighboring area can be reduced.
- FIG. 10 is a schematic flowchart diagram of an information transmission method provided by an embodiment of the present application. It should be noted that FIG. 10 is an example in which the UE processes the PDCCH transmitted on one beam as an example. The method may include the following steps S401 to S409:
- the UE monitors the PDCCH transmitted by the beam in the subframe k.
- the signal monitored by the UE ie, the signal received by the UE
- Steps S202-S204 may be referred to, and other methods may be used. The present invention does not limit this.
- the UE performs descrambling on the demodulated bit sequence according to the beam indication information, where the beam indication information is used to indicate the beam in S401.
- S405 may include the following steps M1 to M3:
- the UE acquires an initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number.
- the UE determines the scrambling sequence according to the initialization factor of the scrambling sequence.
- M3 The UE descrambles the scrambled bit sequence according to the scrambling sequence.
- the M1 to the M3 are corresponding to the T1 to T3 in FIG. 9 , and the specific implementation process may refer to the foregoing, and details are not described herein again.
- the related description of the beam indication information can also refer to the above.
- the method may further include: the UE receiving the beam indication information by using RRC signaling, MAC signaling, or DCI.
- the UE specifically uses which signaling receiving beam indication information is related to which signaling the base station uses to transmit beam indication information. For example, if the base station transmits beam indication information using RRC signaling, the UE receives beam indication information using RRC signaling. Other examples are not listed one by one.
- S406 to S409 Reference may be made to S206 to S209, and other methods may be used. The present invention is not limited thereto.
- steps S401 to S409 may be optional steps.
- the order of execution of any two steps in S401 to S409 is not limited in the embodiment of the present application.
- the processing flow of the PDCCH corresponding to each beam may be all the above S401 to S409.
- the UE considers the beam in the process of performing the descrambling operation, and the process of the descrambling corresponds to the scrambling process in the embodiment shown in FIG. 8. Therefore, the explanation and related content of the related content are For the beneficial effects that can be achieved, reference may be made to the corresponding parts in the embodiment shown in FIG. 8, and details are not described herein again.
- the embodiment of the present application is not limited to the embodiment of the present application, for example, in the process of transmitting a PDCCH, in which a scrambling operation is performed or a method of performing descrambling is considered.
- the technical solution provided by the embodiment of the present application may also be applicable to a scenario for transmitting any of the following channels:
- PDSCH Physical downlink shared channel
- n RNTI represents the UE ID, which is used to identify a UE
- q represents q codewords
- PMCH Physical multicast channel
- the initialization factor of the scrambling sequence among them Indicates a multicast broadcast single frequency network (MBSFN) area identifier.
- MMSFN broadcast single frequency network
- EPCCH Enhanced physical downlink control channel
- the initialization factor of the scrambling sequence m represents the number of EPDCCH sets (or EPDCCH clusters), Represents a high-level configuration ID associated with the EPDCCH setting.
- PUSCH Physical uplink shared channel
- PUCCH Physical uplink control channel
- FIG. 12 is a schematic flowchart diagram of an information transmission method provided by an embodiment of the present application. It should be noted that FIG. 12 is an example in which a base station processes a PDCCH transmitted on one beam as an example. The method may include the following steps S501 to S512:
- S501 to S509 S101 to S109 may be referred to, and other methods may be used. The present invention does not limit this.
- the base station performs interleaving and cyclic shifting on the pre-coded symbol sequence according to the beam indication information.
- the base station interleaves the symbol sequence obtained after precoding, and then cyclically shifts the symbol sequence obtained after the interleaving according to the beam indication information.
- the step of performing interleaving by the base station is an optional step.
- the base station performs cyclic shift according to the beam indication information, and may include the following step N1:
- the base station performs a cyclic shift operation on the first symbol group according to the beam indication information and the cell index, to obtain a second symbol group.
- Example base station according to formula Obtaining a second symbol group; wherein Representing the i-th element in the second symbol group, w(i) representing the i-th element in the first symbol group, Indicates a cell index, and offset indicates beam indication information.
- the first symbol group is a sequence of symbols output after precoding. If the base station performs the step of interleaving, the first symbol group is a sequence of symbols output after interleaving.
- the type and number of modulation symbols included in the first symbol group are related to the modulation scheme.
- a quadruple group z(i) ⁇ y(4i), y(4i+1), y(4i +2), y(4i+3)>.
- the quadruple sequence can be expressed as z(0), z(1), z(2), z(3)....
- the base station interleaves the quadruplet sequence, the information obtained by the element z(i) in the quadruplet sequence is marked as w(i), then the element in the first symbol group may be w(i)
- the first symbol group may be: w(0), w(1), w(2), w(3)....
- the elements in the second symbol group can be Optional, base station according to the formula Where M quad represents the number of quadruplets.
- the example is described by taking the element in the first symbol group as a quadruple group as an example.
- the present application is not limited thereto, and may be, for example, an N-group, where N is an arbitrary integer greater than or equal to 1.
- the base station considers the beam when performing the cyclic shift operation, but the symbol sequence obtained after the cyclic shift of the different beams is not limited in the present application. That is to say, the sequence of symbols obtained after cyclic shift corresponding to different beams may be the same or different.
- S511 The base station performs resource mapping on the symbol sequence obtained after the cyclic shift according to the mapping rule of the time domain after the frequency domain. For the specific implementation process of this step, refer to S311, and details are not described herein again.
- S512 Reference may be made to S112, and other methods may be used, which are not limited by the present invention.
- the base station sends the information mapped to the time-frequency resource to the UE by using the beam indicated by the beam indication information.
- steps S501 to S513 may be optional steps.
- execution sequence of any two of S501 to S513 is not limited in the embodiment of the present application.
- the processing flow of the PDCCH corresponding to each beam by the base station may be: S501 to S511 are performed independently for the two beams. After performing S511, the PDCCHs corresponding to the two beams are all mapped to time-frequency resources corresponding to the same symbol. Then, S512 is executed, that is, the information mapped to the time-frequency resource corresponding to the symbol is subjected to IFFT. Finally, S513 is performed, that is, an OFDM time domain signal is transmitted to the UE through the two beams on the symbol.
- the processing flow of the PDCCH corresponding to each beam by the base station may be: S501 to S315 are performed independently for the two beams.
- the processing procedure of the PDCCH corresponding to each beam by the base station may refer to a processing procedure of the PDCCH corresponding to each beam by the base station in the scenario where the PDCCH occupies two symbols. I will not repeat them here.
- the base station considers the beam in the process of performing the cyclic shift operation, so that the symbol sequences obtained by cyclically shifting the PDCCHs transmitted on different beams may be different, so that PDCCHs transmitted on different beams may use different PDCCHs.
- the randomization technique can improve the effect of randomization and can reduce the interference caused by the multi-beam base station to the neighboring area.
- the technical solution can implement different scrambling sequences corresponding to any multiple beams, the scenario in which the base station uses the multiple beams to simultaneously send the PDCCH to the same UE may be used.
- the problem of interference Moreover, the problem that the base station uses multiple beams to sequentially transmit PDCCHs to the same UE may be solved, and the problem that the multiple beams are not fully utilized is caused.
- S507 can be replaced with S307. That is, the base station considers the beam in both the scrambling operation and the cyclic shift operation. In this way, the technical problems brought by the technical solutions provided in the LTE system can be better solved.
- FIG. 14 is a schematic flowchart diagram of an information transmission method provided by an embodiment of the present application. It should be noted that FIG. 14 is an example in which the UE processes the PDCCH transmitted on one beam as an example. The method may include the following steps S601 to S609:
- S601 Reference may be made to S401, and other methods may be used, which are not limited by the present invention.
- S602 Reference may be made to S202, and other methods may also be used, which are not limited by the present invention.
- the UE performs deinterleaving and cyclic shift inverse operations on the symbol sequence obtained after the FFT according to the beam indication information.
- the UE deinterleaves the symbol sequence obtained after the FFT, and then performs a cyclic shift inverse operation on the symbol sequence obtained after the deinterleaving according to the beam indication information.
- the step of performing deinterleaving by the UE is an optional step, and whether the step is performed is related to a step of performing interleaving on the base station side. For example, if the base station performs the interleaving step, the UE needs to perform the step of deinterleaving.
- the UE performs a cyclic shift inverse operation according to the beam indication information, and may include the following step W1:
- W1 The UE performs a cyclic shift operation on the second symbol group according to the beam indication information and the cell index, to obtain a first symbol group.
- the W1 corresponds to the N1 in FIG. 13 , and the specific implementation process may refer to the foregoing, and details are not described herein again.
- the related description of the beam indication information can also refer to the above.
- the second symbol group is a symbol sequence output after the FFT. If the UE performs the step of deinterleaving, the second symbol group is a sequence of symbols output after deinterleaving.
- the method may further include: the UE receiving the beam indication information by using RRC signaling, MAC signaling, or DCI.
- which signaling receiving beam indication information is related to which signaling information used by the base station to transmit beam indication information. For example, if the base station transmits beam indication information using RRC signaling, the UE receives beam indication information using RRC signaling. Other examples are not listed one by one.
- S604 to S609 S204 to S209 may be referred to, and other methods may be used. The present invention does not limit this.
- steps S601 to S609 may be optional steps.
- execution sequence of any two steps S601 to S609 is not limited in the embodiment of the present application.
- the UE considers a beam in the process of performing a cyclic shift inverse operation, and the process of the cyclic shift inverse operation corresponds to the cyclic shift process in the embodiment shown in FIG. 12, and therefore,
- the process of the cyclic shift inverse operation corresponds to the cyclic shift process in the embodiment shown in FIG. 12, and therefore,
- S507 is replaced with S307
- S605 in this embodiment may be replaced with S405.
- the beneficial effects that can be achieved can be referred to the above, and will not be repeated here.
- FIG. 13 and FIG. 14 are described as an example of "considering a beam when performing a cyclic shift operation or a cyclic shift inverse operation in the process of transmitting a PDCCH".
- this embodiment of the present application For example, when the PUCCH format 3 is transmitted, the technical solution provided by the embodiment of the present application may also be applied to a scenario in which a PUCCH is transmitted. among them, a sequence of symbols representing the cyclic shift to be performed, Represents the sequence of symbols obtained after cyclic shift, and n s represents the slot number. Indicates the number of subcarriers of a resource block (RB).
- RB resource block
- each network element such as a network device (such as a base station) or a terminal device (such as a UE).
- a network device such as a base station
- a terminal device such as a UE
- the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
- the embodiment of the present application may perform the division of the function module on the network device or the terminal device according to the foregoing method example.
- each function module may be divided according to each function, or two or more functions may be integrated into one processing module.
- the above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner. The following is an example of dividing each functional module by using corresponding functions:
- FIG. 16 shows a schematic structural diagram of an information transmission device 160.
- the information transmission device 160 may be the network device 100, such as a base station, referred to above.
- the information transmission device 160 may include a scrambling unit 1601, a mapping unit 1602, and a transmitting unit 1603.
- the scrambling unit 1601 can be used to perform the steps S307 in FIG. 8, the steps in FIG. 9, and/or other processes for supporting the techniques described herein.
- Mapping unit 1602 can be used to perform S311 in FIG. 8, and/or other processes for supporting the techniques described herein.
- Transmitting unit 1603 can be used to perform S311 in FIG. 8, and/or other processes for supporting the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
- FIG. 17 shows a schematic structural diagram of an information transmission device 170.
- the information transmission device 170 may be the terminal device 200, such as a UE, referred to above.
- the information transmission device 170 may include a receiving unit 1701, an obtaining unit 1702, and a descrambling unit 1703.
- the receiving unit 1701 may be used to execute S401 in FIG. 10, the steps in FIG. 11, and/or other processes for supporting the techniques described herein.
- the obtaining unit 1702 can be used to perform S402 in FIG. 10, and/or other processes for supporting the techniques described herein.
- the descrambling unit 1703 can be used to perform S405 in FIG. 10, and/or other processes for supporting the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
- FIG. 18 shows a schematic structural diagram of an information transmission device 180.
- the information transmission device 180 can be the network device 100, such as a base station, referred to above.
- the information transmission device 180 may include a cyclic shift unit 1801, a mapping unit 1802, and a transmitting unit 1803.
- the cyclic shift unit 1801 can be used to perform S510 in FIG. 12, N1 in FIG. 13, and/or other processes for supporting the techniques described herein.
- Mapping unit 1802 can be used to perform S511 in FIG. 12, and/or other processes for supporting the techniques described herein.
- Transmitting unit 1803 can be used to perform S513 in FIG. 12, and/or other processes for supporting the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
- FIG. 19 shows a schematic structural diagram of an information transmission device 190.
- the information transmission device 190 may be the terminal device 200, such as a UE, referred to above.
- the information transmission device 190 may include a receiving unit 1901, an obtaining unit 1902, and a cyclic shift inverse operation unit 1903.
- the receiving unit 1901 can be used to execute S601 in FIG. 14, and/or other processes for supporting the techniques described herein.
- the obtaining unit 1902 can be used to perform S602 in FIG. 14, and/or other processes for supporting the techniques described herein.
- the cyclic shift inverse operation unit 1903 can be used to perform S603 in FIG. 14, and/or other processes for supporting the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
- the information transmission devices 160 to 190 are presented in a form in which each function is divided into individual functional modules, or are presented in an integrated manner to divide the functional modules.
- a “module” herein may refer to an application-specific integrated circuit (ASIC), a processor and memory that executes one or more software or firmware programs, integrated logic circuits, and/or other devices that provide the above functionality.
- the processor and the memory may be integrated or may be relatively independent.
- any of the information transmission devices 160 to 190 can be realized by the structure shown in FIG.
- the information transmission device 210 may include a memory 2101, a processor 2102, and a communication interface 2103.
- the memory 2102 is configured to store computer execution instructions.
- the processor 2101 executes the computer execution instructions stored in the memory 2102 to enable the information transmission device 210 to execute the information transmission method provided by the embodiment of the present application.
- the communication interface 2103 can be a transceiver.
- the transmitting unit 1603 can correspond to the communication interface 2103 in FIG.
- the scrambling unit 1601 and the mapping unit 1602 may be embedded in hardware or in a memory 2101 independent of the information transmission device 210.
- receiving unit 1701 may correspond to communication interface 2103 in FIG.
- the obtaining unit 1702 and the descrambling unit 1703 may be embedded in hardware or in a memory 2101 independent of the information transmission device 210.
- the transmitting unit 1803 can correspond to the communication interface 2103 in FIG.
- the cyclic shift unit 1801 and the mapping unit 1802 may be embedded in hardware or in a memory 2101 independent of the information transmission device 210.
- receiving unit 1901 can correspond to communication interface 2103 in FIG.
- the acquisition unit 1902 and the cyclic shift inverse operation unit 1903 may be embedded in hardware or in a memory 2101 independent of the information transmission device 210.
- the information transmission device 210 may be a field-programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processing unit. (central processor unit, CPU), network processor (NP), digital signal processor (DSP), microcontroller (micro controller unit (MCU), can also use programmable controller (programmable Logic device, PLD) or other integrated chip.
- FPGA field-programmable gate array
- ASIC application specific integrated circuit
- SoC system on chip
- CPU central processor unit
- NP network processor
- DSP digital signal processor
- MCU microcontroller
- PLD programmable Logic device
- the embodiment of the present application further provides a storage medium, which may include a memory 1602 or a memory 1702 or a memory 1802 or a memory 1902.
- the information transmission device provided by the embodiment of the present application can be used to perform the foregoing information transmission method. Therefore, the technical effects of the present invention can be referred to the foregoing method embodiments.
- the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
- a software program it may be implemented in whole or in part in the form of a computer program product.
- the computer program product includes one or more computer instructions.
- the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part.
- the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
- the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transmission to another website site, computer, server or data center via wired (eg coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.).
- the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device that includes one or more servers, data centers, etc. that can be integrated with the media.
- the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)) or the like.
- a magnetic medium eg, a floppy disk, a hard disk, a magnetic tape
- an optical medium eg, a DVD
- a semiconductor medium such as a solid state disk (SSD)
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Abstract
Disclosed are an information transmission method and apparatus, relating to the technical field of communications. The technical solution takes the influence of a beam on information transmission into consideration, so as to improve the system performance. The method may comprise: acquiring a scrambled bit sequence according to beam indication information; modulating the scrambled bit sequence, and then mapping same to a time-frequency resource; and sending, by means of a beam indicated by the beam indication information, the scrambled bit sequence, mapped to the time-frequency resource, to a terminal device.
Description
本申请实施例涉及通信技术领域,尤其涉及一种信息传输方法和装置。The embodiments of the present invention relate to the field of communications technologies, and in particular, to an information transmission method and apparatus.
在长期演进(long term evolution,LTE)系统中,基站对物理下行控制信道(physical downlink control channel,PDCCH)的物理层处理流程包括:基站对原始数据比特进行信道编码、速率匹配、加扰、调制、循环移位,以及资源映射等操作之后发送出去。该技术方案不再适合新无线(New Radio,NR)NR的需求。In a long term evolution (LTE) system, a physical layer processing procedure of a physical downlink control channel (PDCCH) of a base station includes: performing channel coding, rate matching, scrambling, and modulation on original data bits by a base station. , cyclic shift, and resource mapping and other operations are sent out. This technical solution is no longer suitable for the needs of New Radio (NR) NR.
发明内容Summary of the invention
本申请提供一种信息传输方法和装置,考虑了波束对加扰操作和循环移位操作中的至少一种操作的影响,从而提高了系统性能。The present application provides an information transmission method and apparatus, which considers the influence of at least one of a beam pair scrambling operation and a cyclic shift operation, thereby improving system performance.
为了提高随机化的效果,并且降低多波束基站对邻区造成的干扰。本申请提供了如下技术方案:In order to improve the effect of randomization, and reduce the interference caused by the multi-beam base station to the neighboring area. The application provides the following technical solutions:
第一方面,本申请提供了一种加扰方法和装置。In a first aspect, the present application provides a scrambling method and apparatus.
在一个设计中,该加扰方法包括:根据波束指示信息,获取加扰后的比特序列。其中,加扰后的比特序列可以是对任意信道或数据进行加扰后得到的比特序列,本申请对此不进行限定。该技术方案中,在执行加扰操作的过程中考虑了波束,这样,不同波束上传输的PDCCH可以使用不同的加扰序列进行加扰,使得不同的波束可以使用不同的随机化技术,从而可以提高随机化的效果,并且,能够降低多波束基站对邻区造成的干扰。In one design, the scrambling method includes obtaining a scrambled bit sequence based on the beam indication information. The scrambled bit sequence may be a bit sequence obtained by scrambling any channel or data, which is not limited in this application. In the technical solution, the beam is considered in the process of performing the scrambling operation, so that the PDCCH transmitted on different beams can be scrambled using different scrambling sequences, so that different beams can use different randomization techniques, so that The effect of randomization is improved, and the interference caused by the multi-beam base station to the neighboring area can be reduced.
所述根据波束指示信息,获取加扰后的比特序列,包括:根据波束指示信息,获取加扰序列的初始化因子。然后,根据加扰序列的初始化因子,确定该加扰序列。接着,根据该加扰序列,对待加扰比特序列进行加扰,得到加扰后的比特序列。该可选的实现方式提供了一种根据波束指示信息,进行加扰操作的方式,具体实现时不限于此。And obtaining, according to the beam indication information, the scrambled bit sequence, comprising: acquiring an initialization factor of the scrambling sequence according to the beam indication information. The scrambling sequence is then determined based on the initialization factor of the scrambling sequence. Then, according to the scrambling sequence, the scrambled bit sequence is scrambled to obtain a scrambled bit sequence. The optional implementation provides a manner of performing a scrambling operation according to the beam indication information, and the specific implementation is not limited thereto.
在另一个设计中,该加扰方法包括,产生与波束指示信息相关联的初始化因子,基于所述初始化因子获得加扰序列,基于所述加扰序列对待加扰序列进行加扰。在该设计中,由于加扰序列是基于初始化因子获得的,而初始化因子与波束指示信息相关联,因此利用所述加扰序列进行加扰的过程中,波束相关信息被充分考虑,使得不同的波束可以使用不同的随机化技术,提高了随机化的效果,并且能够降低多波束基站对邻区造成的干扰。In another design, the scrambling method includes generating an initialization factor associated with beam indication information, obtaining a scrambling sequence based on the initialization factor, and scrambling the scrambling sequence based on the scrambling sequence. In this design, since the scrambling sequence is obtained based on the initialization factor and the initialization factor is associated with the beam indication information, the beam correlation information is fully considered in the process of scrambling using the scrambling sequence, so that different The beam can use different randomization techniques to improve the randomization effect and reduce the interference caused by the multi-beam base station to the neighboring area.
相应的,本申请还提供了一种加扰装置,可以实现上述加扰方法。例如该加扰装置可以是芯片(如基带芯片,或通信芯片等)或者发送设备(如基站,或者终端等)。可以通过软件、硬件、或者通过硬件执行相应的软件实现上述方法。Correspondingly, the present application also provides a scrambling device, which can implement the above scrambling method. For example, the scrambling device may be a chip (such as a baseband chip, or a communication chip, etc.) or a transmitting device (such as a base station, or a terminal, etc.). The above method can be implemented by software, hardware, or by executing corresponding software by hardware.
在一种可能的实现方式中,该加扰装置包括处理器、存储器。该处理器被配置为支持该装置执行上述加扰方法中相应的功能。存储器用于与处理器耦合,其保存该装置必要的程序(指令)和数据。可选的,该加扰装置还可以包括通信接口,用于支持该装置与其他网元之间的通信。该通信接口可以是收发器。In a possible implementation, the scrambling device comprises a processor and a memory. The processor is configured to support the apparatus to perform the corresponding function of the scrambling method described above. The memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device. Optionally, the scrambling device may further comprise a communication interface for supporting communication between the device and other network elements. The communication interface can be a transceiver.
在另一种可能的实现方式中,该装置可以包括:加扰单元,用于根据波束指示信息,获取加扰后的比特序列。可选的,加扰单元具体可以用于:根据波束指示信息,获取加扰序列的初始化因子。然后,根据加扰序列的初始化因子,确定该加扰序列。接着,根据该加扰序 列,对待加扰比特序列进行加扰,得到加扰后的比特序列。In another possible implementation manner, the apparatus may include: a scrambling unit, configured to acquire the scrambled bit sequence according to the beam indication information. Optionally, the scrambling unit is specifically configured to: obtain an initialization factor of the scrambling sequence according to the beam indication information. The scrambling sequence is then determined based on the initialization factor of the scrambling sequence. Then, according to the scrambling sequence, the scrambled bit sequence is scrambled to obtain a scrambled bit sequence.
第二方面,本申请提供了一种解扰方法和装置。In a second aspect, the present application provides a descrambling method and apparatus.
在一个设计中,该方法包括:根据波束指示信息,对加扰后的比特序列解扰。该技术方案与第一方面提供的加扰方法对应,因此其能达到的有益效果可以参考上文,此处不再赘述。In one design, the method includes descrambling the scrambled bit sequence based on the beam indication information. The technical solution corresponds to the scrambling method provided by the first aspect, and therefore the beneficial effects that can be achieved can be referred to the above, and are not described herein again.
可以理解的,若加扰后的比特序列应用于下行传输过程中,则该方法的执行主体可以是终端设备(如UE)。若加扰后的比特序列应用于上行传输过程中,则该方法的执行主体可以是网络设备(例如基站)。It can be understood that if the scrambled bit sequence is applied to the downlink transmission process, the execution body of the method may be a terminal device (such as a UE). If the scrambled bit sequence is applied to the uplink transmission process, the executor of the method may be a network device (e.g., a base station).
所述根据波束指示信息,对加扰后的比特序列解扰,可以包括:根据波束指示信息,获取加扰序列的初始化因子。然后,根据加扰序列的初始化因子,确定该加扰序列。接着,根据该加扰序列,对加扰后的比特序列进行解扰。该可选的实现方式提供了一种根据波束指示信息,对加扰后的比特序列解扰的方式,具体实现时不限于此。The descrambling the scrambled bit sequence according to the beam indication information may include: acquiring an initialization factor of the scrambling sequence according to the beam indication information. The scrambling sequence is then determined based on the initialization factor of the scrambling sequence. Then, the scrambled bit sequence is descrambled according to the scrambling sequence. The optional implementation provides a method for descrambling the scrambled bit sequence according to the beam indication information, and the specific implementation is not limited thereto.
在另一个设计中,该方法包括:产生与波束指示信息相关联的初始化因子,基于所述初始化因子获得加扰序列,基于所述加扰序列,对待解扰的序列进行解扰。由于通过对初始化因子的设计,使得加扰序列考虑了波束指示信息,因此可以更好的提高随机化的效果,降低干扰。In another design, the method includes generating an initialization factor associated with beam indication information, obtaining a scrambling sequence based on the initialization factor, and descrambling the sequence to be descrambled based on the scrambling sequence. Since the designation of the initialization factor makes the scrambling sequence consider the beam indication information, the randomization effect can be better improved and the interference can be reduced.
相应的,本申请还提供了一种解扰装置,可以实现上述解扰方法。例如该解扰装置可以是芯片(如基带芯片,或通信芯片等)或者发送设备(如基站,或者终端等)。可以通过软件、硬件、或者通过硬件执行相应的软件实现上述方法。Correspondingly, the present application also provides a descrambling device, which can implement the above-described descrambling method. For example, the descrambling device may be a chip (such as a baseband chip, or a communication chip, etc.) or a transmitting device (such as a base station, or a terminal, etc.). The above method can be implemented by software, hardware, or by executing corresponding software by hardware.
在一种可能的实现方式中,该解扰装置的结构中包括处理器、存储器;该处理器被配置为支持该装置执行上述加扰方法中相应的功能。存储器用于与处理器耦合,其保存该装置必要的程序(指令)和数据。可选的,该解扰装置还可以包括通信接口用于支持该装置与其他网元之间的通信。该通信接口可以是收发器。In a possible implementation, the structure of the descrambling device includes a processor and a memory; the processor is configured to support the device to perform a corresponding function in the above scrambling method. The memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device. Optionally, the descrambling device may further comprise a communication interface for supporting communication between the device and other network elements. The communication interface can be a transceiver.
在另一种可能的实现方式中,该解扰装置,可以包括解扰单元,用于根据波束指示信息,对加扰后的比特序列解扰。可选的,解扰单元具体可以用于:首先,根据波束指示信息,获取加扰序列的初始化因子。然后,根据加扰序列的初始化因子,确定该加扰序列。接着,根据该加扰序列,对加扰后的比特序列进行解扰。In another possible implementation manner, the descrambling device may include a descrambling unit, configured to descramble the scrambled bit sequence according to the beam indication information. Optionally, the descrambling unit may be specifically configured to: first, obtain an initialization factor of the scrambling sequence according to the beam indication information. The scrambling sequence is then determined based on the initialization factor of the scrambling sequence. Then, the scrambled bit sequence is descrambled according to the scrambling sequence.
基于上述加扰方法和解扰方法,在上述加扰或解扰方案中,可以根据波束指示信息、小区信息和时隙号,获取加扰序列的初始化因子。其中,小区信息可以是小区标识(ID),或者小区索引,基于小区ID或者小区索引获得的信息,或者是与小区信息相关的信息。所述时隙号可以是传输加扰后的比特序列时所占用的时隙的时隙号。Based on the above-described scrambling method and descrambling method, in the above-mentioned scrambling or descrambling scheme, the initialization factor of the scrambling sequence can be acquired according to the beam indication information, the cell information, and the slot number. The cell information may be a cell identifier (ID), or a cell index, information obtained based on a cell ID or a cell index, or information related to cell information. The slot number may be a slot number of a slot occupied when transmitting the scrambled bit sequence.
在一种可选的实现方式中,根据波束指示信息、小区索引和时隙号,获取加扰序列的初始化因子,可以包括:根据公式
获取加扰序列的初始化因子c
init;其中,
表示向下取整,n
s表示时隙号,
表示小区索引,offset表示与所述波束指示信息相关的一个值。
In an optional implementation manner, acquiring an initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number may include: according to a formula Obtain the initialization factor c init of the scrambling sequence; where Indicates rounding down, n s is the slot number, Indicates a cell index, and offset represents a value associated with the beam indication information.
第三方面,本申请提供了一种信息传输方法,该方法的执行主体可以是发送设备。所述方法包括:根据波束指示信息,获取加扰后的比特序列。然后,将加扰后的比特序列经调制后映射至时频资源上,通过波束指示信息所指示的波束,发送映射至时频资源上的加扰后的比特序列。该技术方案中,发送设备在执行加扰操作的过程中考虑了波束,其相关内容的解释、相关步骤的具体实现方式,以及有益效果均可以参考上述加扰方案中的描 述。In a third aspect, the present application provides an information transmission method, and an execution body of the method may be a transmitting device. The method includes obtaining a scrambled bit sequence according to beam indication information. Then, the scrambled bit sequence is modulated and mapped to the time-frequency resource, and the scrambled bit sequence mapped to the time-frequency resource is transmitted through the beam indicated by the beam indication information. In the technical solution, the transmitting device considers the beam in the process of performing the scrambling operation, and the explanation of the related content, the specific implementation manner of the related steps, and the beneficial effects can all refer to the description in the above-mentioned scrambling scheme.
在一种可能的实现方式中,可以通过RRC信令、MAC信令或DCI向该终端设备发送波束指示信息。In a possible implementation, the beam indication information may be sent to the terminal device by using RRC signaling, MAC signaling, or DCI.
相应的还提供了一种信息传输装置,用以实现第三方面所述信息传输方法。该装置可以通过软件,或者硬件,或者通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。Correspondingly, an information transmission apparatus is further provided to implement the information transmission method of the third aspect. The device can be implemented by software, or hardware, or by hardware to execute corresponding software. The hardware or software includes one or more modules corresponding to the above functions.
在一种可能的实现方式中,该装置可以包括:加扰单元、映射单元和发送单元。其中,加扰单元,用于根据波束指示信息,获取加扰后的比特序列。映射单元,用于将加扰后的比特序列经调制后映射至时频资源上。发送单元通过波束指示信息所指示的波束,发送映射至时频资源上的加扰后的比特序列。In a possible implementation manner, the apparatus may include: a scrambling unit, a mapping unit, and a sending unit. The scrambling unit is configured to obtain the scrambled bit sequence according to the beam indication information. a mapping unit, configured to map the scrambled bit sequence to a time-frequency resource. The transmitting unit transmits the scrambled bit sequence mapped to the time-frequency resource by using the beam indicated by the beam indication information.
在另一个可能的实现方式中,该装置的结构中包括处理器、存储器和通信接口;该处理器被配置为支持该装置执行上述第三方面方法中相应的功能。该通信接口用于支持该装置与其他网元之间的通信。该存储器用于与处理器耦合,其保存该装置必要的程序指令和数据。该通信接口具体可以是收发器。In another possible implementation, the apparatus includes a processor, a memory, and a communication interface; the processor is configured to support the apparatus to perform a corresponding function in the method of the third aspect described above. The communication interface is used to support communication between the device and other network elements. The memory is for coupling to a processor that holds the program instructions and data necessary for the device. The communication interface may specifically be a transceiver.
第四方面,本申请提供了一种信息传输方法,该方法的执行主体可以是接收设备,该方法可以包括:首先,接收通过波束发送的映射至时频资源上的加扰后的比特序列;其中,加扰后的比特序列是根据波束指示信息确定的比特序列,波束指示信息用于指示波束。然后,从该时频资源上,获取加扰后的比特序列。最后,根据波束指示信息,对加扰后的比特序列进行解扰。该技术方案中,终端设备在执行解扰操作的过程中考虑了波束,其相关内容的解释、相关步骤的具体实现方式,以及有益效果均可以参考上述第二方面提供的解扰方法。In a fourth aspect, the present application provides an information transmission method, where an execution body of the method may be a receiving device, and the method may include: first, receiving, by using a beam, a mapped bit sequence that is mapped to a time-frequency resource; The scrambled bit sequence is a bit sequence determined according to beam indication information, and the beam indication information is used to indicate a beam. Then, from the time-frequency resource, the scrambled bit sequence is obtained. Finally, the scrambled bit sequence is descrambled according to the beam indication information. In the technical solution, the terminal device considers the beam in the process of performing the descrambling operation, and the explanation of the related content, the specific implementation manner of the related steps, and the beneficial effects can refer to the descrambling method provided by the second aspect.
在一种可能的实现方式中,可以通过RRC信令、MAC信令或DCI接收波束指示信息。In a possible implementation manner, beam indication information may be received through RRC signaling, MAC signaling, or DCI.
相应的还提供了一种信息传输装置,用以实现第三方面所述信息传输方法。该装置可以通过软件,或者硬件,或者通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。Correspondingly, an information transmission apparatus is further provided to implement the information transmission method of the third aspect. The device can be implemented by software, or hardware, or by hardware to execute corresponding software. The hardware or software includes one or more modules corresponding to the above functions.
在一种可能的实现方式中,该装置可以包括:接收单元、获取单元和解扰单元。其中,接收单元,用于接收通过波束发送的映射至时频资源上的加扰后的比特序列;其中,加扰后的比特序列是根据波束指示信息确定的比特序列,波束指示信息用于指示波束。获取单元,用于从该时频资源上,获取加扰后的比特序列。解扰单元,用于根据波束指示信息,对加扰后的比特序列进行解扰。In a possible implementation manner, the apparatus may include: a receiving unit, an acquiring unit, and a descrambling unit. The receiving unit is configured to receive the scrambled bit sequence mapped to the time-frequency resource by using the beam, where the scrambled bit sequence is a bit sequence determined according to the beam indication information, and the beam indication information is used to indicate Beam. And an obtaining unit, configured to obtain the scrambled bit sequence from the time-frequency resource. And a descrambling unit, configured to descramble the scrambled bit sequence according to the beam indication information.
在另一个可能的实现方式中,该装置的结构中包括处理器、存储器和通信接口;该处理器被配置为支持该装置执行上述第四方面方法中相应的功能。该通信接口用于支持该装置与其他网元之间的通信。该存储器用于与处理器耦合,其保存该装置必要的程序指令和数据。该通信接口具体可以是收发器。In another possible implementation, the apparatus includes a processor, a memory, and a communication interface; the processor is configured to support the apparatus to perform a corresponding function in the method of the fourth aspect above. The communication interface is used to support communication between the device and other network elements. The memory is for coupling to a processor that holds the program instructions and data necessary for the device. The communication interface may specifically be a transceiver.
为了提高随机化的效果,并且,能够降低多波束基站对邻区造成的干扰。可选的,为了解决多个波束之间自干扰的问题等。本申请还提供了以下技术方案:In order to improve the effect of randomization, and it is possible to reduce interference caused by the multi-beam base station to the neighboring area. Optionally, in order to solve the problem of self-interference between multiple beams, and the like. The application also provides the following technical solutions:
第五方面,本申请提供了一种循环移位方法和装置。In a fifth aspect, the present application provides a cyclic shift method and apparatus.
在一个设计中,该循环移位方法包括:根据波束指示信息,对第一符号组进行循环移位, 得到第二符号组;其中,第一符号组是对原始数据比特进行调制后得到的符号组。该技术方案中,基站在执行循环移位操作的过程中考虑了波束,这样,不同波束上传输的PDCCH经循环移位后得到的符号序列可以不同,使得不同波束上传输的PDCCH可以使用不同的随机化技术,从而可以提高随机化的效果,并且,能够降低多波束基站对邻区造成的干扰。可选的,由于该技术方案可以实现任意多个波束对应的加扰序列不同,因此,可以解决基站使用该多个波束同时向同一个终端设备发送PDCCH的场景中,导致的多个波束之间自干扰的问题。并且,可以解决基站使用多个波束依次向同一个终端设备发送PDCCH的场景中,导致的没有充分利用多个波束的问题。In one design, the cyclic shifting method includes: cyclically shifting the first symbol group according to beam indication information to obtain a second symbol group; wherein the first symbol group is a symbol obtained by modulating original data bits group. In the technical solution, the base station considers the beam in the process of performing the cyclic shift operation, so that the symbol sequences obtained by cyclically shifting the PDCCHs transmitted on different beams may be different, so that PDCCHs transmitted on different beams may use different PDCCHs. The randomization technique can improve the effect of randomization and can reduce the interference caused by the multi-beam base station to the neighboring area. Optionally, since the technical solution can implement different scrambling sequences corresponding to any multiple beams, the scenario in which the base station uses the multiple beams to simultaneously transmit the PDCCH to the same terminal device may be used. Self-interference problem. Moreover, the problem that the base station uses multiple beams to sequentially transmit the PDCCH to the same terminal device may be solved, and the problem that the multiple beams are not fully utilized is caused.
所述根据波束指示信息,对第一符号组进行循环移位,得到第二符号组,可以包括:根据波束指示信息和小区索引,对第一符号组进行循环移位,得到第二符号组。其中,小区索引是指该终端设备所在小区的小区索引。The cyclically shifting the first symbol group according to the beam indication information to obtain the second symbol group may include: cyclically shifting the first symbol group according to the beam indication information and the cell index to obtain a second symbol group. The cell index refers to a cell index of a cell where the terminal device is located.
相应的,本申请还提供了一种循环移位装置,可以实现上述循环移位方法。例如该循环移位装置可以是芯片(如基带芯片,或通信芯片等)或者发送设备(如基站,或者终端等)。可以通过软件、硬件、或者通过硬件执行相应的软件实现上述方法。Correspondingly, the present application also provides a cyclic shifting device, which can implement the above cyclic shifting method. For example, the cyclic shifting device may be a chip (such as a baseband chip, or a communication chip, etc.) or a transmitting device (such as a base station, or a terminal, etc.). The above method can be implemented by software, hardware, or by executing corresponding software by hardware.
在一种可能的实现方式中,该循环移位装置包括处理器、存储器。该处理器被配置为支持该装置执行上述循环移位方法中相应的功能。存储器用于与处理器耦合,其保存该装置必要的程序(指令)和数据。可选的,该循环移位装置还可以包括通信接口,用于支持该装置与其他网元之间的通信。该通信接口可以是收发器。In a possible implementation, the cyclic shifting device comprises a processor and a memory. The processor is configured to support the apparatus to perform the corresponding functions in the cyclic shifting method described above. The memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device. Optionally, the cyclic shifting device may further comprise a communication interface for supporting communication between the device and other network elements. The communication interface can be a transceiver.
在另一种可能的实现方式中,该循环移位装置可以包括:循环移位单元,用于根据波束指示信息,对第一符号组进行循环移位,得到第二符号组;其中,第一符号组是对原始数据比特进行调制后得到的符号组。在一种可能的实现方式中,循环移位单元具体可以用于:根据波束指示信息和小区索引,对第一符号组进行循环移位,得到第二符号组。其中,小区索引是指该终端设备所在小区的小区索引。In another possible implementation, the cyclic shifting apparatus may include: a cyclic shifting unit, configured to cyclically shift the first symbol group according to the beam indication information to obtain a second symbol group; wherein, the first A symbol group is a symbol group obtained by modulating original data bits. In a possible implementation, the cyclic shift unit may be specifically configured to cyclically shift the first symbol group according to the beam indication information and the cell index to obtain a second symbol group. The cell index refers to a cell index of a cell where the terminal device is located.
在第五方面提供的方案中,所述根据波束指示信息和小区索引,对第一符号组进行循环移位,得到第二符号组,可以包括:根据公式
得到第二符号组;w(i)表示第一符号组中的第i个元素,
表示第二符号组中的第i个元素,
表示小区索引,offset表示与波束指示信息相关的一个值。
In the solution provided by the fifth aspect, the cyclically shifting the first symbol group according to the beam indication information and the cell index to obtain the second symbol group may include: according to the formula Obtaining a second symbol group; w(i) represents an ith element in the first symbol group, Represents the ith element in the second symbol group, Indicates a cell index, and offset represents a value associated with beam indication information.
第六方面,本申请提供了一种循环移位逆操作方法和装置。In a sixth aspect, the present application provides a cyclic shift inverse operation method and apparatus.
在一个设计中,该方法可以包括:根据波束指示信息,对第二符号组进行循环移位逆操作,得到第一符号组。其中,第二符号组是根据波束指示信息对第一符号组进行循环移位后得到的符号组,第一符号组是对原始数据比特进行调制后得到的符号组。该技术方案与第五方面提供的循环移位方法对应,因此其能达到的有益效果可以参考上文,此处不再赘述。In one design, the method may include: performing a cyclic shift inverse operation on the second symbol group according to the beam indication information to obtain a first symbol group. The second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information, and the first symbol group is a symbol group obtained by modulating the original data bits. The technical solution corresponds to the cyclic shift method provided by the fifth aspect, and therefore the beneficial effects that can be achieved can be referred to the above, and are not described herein again.
相应的,本申请还提供了一种循环移位逆操作装置。可以实现上述循环移位逆操作方法。例如该循环移位逆操作装置可以是芯片(如基带芯片,或通信芯片等)或者接收设备(如基站,或者终端等)。可以通过软件、硬件、或者通过硬件执行相应的软件实现上述方法。Correspondingly, the present application also provides a cyclic shift inverse operation device. The above cyclic shift inverse operation method can be implemented. For example, the cyclic shift inverse operation device may be a chip (such as a baseband chip, or a communication chip, etc.) or a receiving device (such as a base station, or a terminal, etc.). The above method can be implemented by software, hardware, or by executing corresponding software by hardware.
在一种可能的实现方式中,该循环移位逆操作装置包括处理器、存储器。该处理器被配置为支持该装置执行上述循环移位逆操作方法中相应的功能。存储器用于与处理器耦合,其保存该装置必要的程序(指令)和数据。可选的,该循环移位逆操作装置还可以包括通信接 口,用于支持该装置与其他网元之间的通信。该通信接口可以是收发器。In a possible implementation, the cyclic shift inverse operation device includes a processor and a memory. The processor is configured to support the apparatus to perform the corresponding functions of the cyclic shift inverse operation method described above. The memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device. Optionally, the cyclic shift inverse operation device may further include a communication interface for supporting communication between the device and other network elements. The communication interface can be a transceiver.
在另一种可能的实现方式中,该循环移位逆操作装置可以包括:循环移位逆操作单元,用于根据波束指示信息,对第二符号组进行循环移位逆操作,得到第一符号组。其中,第二符号组是根据波束指示信息对第一符号组进行循环移位后得到的符号组,第一符号组是对原始数据比特进行调制后得到的符号组In another possible implementation, the cyclic shift inverse operation unit may include: a cyclic shift inverse operation unit, configured to perform a cyclic shift inverse operation on the second symbol group according to the beam indication information, to obtain the first symbol group. The second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information, and the first symbol group is a symbol group obtained by modulating the original data bits.
在第六方面提供的方案中根据波束指示信息,对第二符号组进行循环移位逆操作,得到第一符号组,可以包括:根据波束指示信息和小区索引,对第二符号组进行循环移位逆操作,得到第一符号组。In the solution provided by the sixth aspect, performing a cyclic shift inverse operation on the second symbol group according to the beam indication information, to obtain the first symbol group, may include: cyclically shifting the second symbol group according to the beam indication information and the cell index. Inverse operation, the first symbol group is obtained.
在一种可能的实现方式中,根据波束指示信息和小区索引,对第二符号组进行循环移位逆操作,得到第一符号组,可以包括:根据公式
得到第一符号组;其中,
表示第二符号组中的第i个元素,w(i)表示第一符号组中的第i个元素,
表示小区索引,offset表示与波束指示信息相关的一个值。
In a possible implementation manner, performing a cyclic shift inverse operation on the second symbol group according to the beam indication information and the cell index, to obtain the first symbol group, which may include: according to a formula Obtaining a first symbol group; wherein Representing the i-th element in the second symbol group, w(i) representing the i-th element in the first symbol group, Indicates a cell index, and offset represents a value associated with beam indication information.
第七方面,本申请提供了一种信息传输方法和装置,该方法的执行主体可以是发送设备(例如基站),该方法可以包括以下步骤:首先,根据波束指示信息,对第一符号组进行循环移位,得到第二符号组;其中,第一符号组是对原始数据比特进行调制后得到的符号组。其次,将第二符号组映射至时频资源上。最后,通过波束指示信息所指示的波束,向终端设备发送映射至时频资源上的第二符号组。该技术方案中,在执行循环移位操作的过程中考虑了波束,其相关内容的解释、相关步骤的具体实现方式,以及有益效果均可以参考上述循环移位方法。In a seventh aspect, the present application provides an information transmission method and apparatus, where an execution body of the method may be a transmitting device (for example, a base station), and the method may include the following steps: First, performing a first symbol group according to beam indication information Cycling shifts to obtain a second symbol group; wherein the first symbol group is a symbol group obtained by modulating original data bits. Second, the second symbol group is mapped to the time-frequency resource. Finally, the second symbol group mapped to the time-frequency resource is sent to the terminal device by using the beam indicated by the beam indication information. In the technical solution, the beam is considered in the process of performing the cyclic shift operation, and the explanation of the related content, the specific implementation manner of the related steps, and the beneficial effects can all refer to the above cyclic shift method.
在一种可能的实现方式中,该方法还可以包括:通过RRC信令、MAC信令或DCI向该终端设备发送波束指示信息。In a possible implementation manner, the method may further include: sending, by using RRC signaling, MAC signaling, or DCI, beam indication information to the terminal device.
相应的,还提供了一种信息传输装置,可以实现第七方面所述的信息传输方法。例如该装置可以是发送设备(如基站,或者终端等)。可以通过软件、硬件、或者通过硬件执行相应的软件实现上述方法。Correspondingly, an information transmission apparatus is further provided, which can implement the information transmission method described in the seventh aspect. For example, the device may be a transmitting device (such as a base station, or a terminal, etc.). The above method can be implemented by software, hardware, or by executing corresponding software by hardware.
在一种可能的实现方式中,该信息传输装置包括处理器、存储器。该处理器被配置为支持该装置执行上述第七方面方法中相应的功能。存储器用于与处理器耦合,其保存该装置必要的程序(指令)和数据。可选的,该信息传输装置还可以包括通信接口,用于支持该装置与其他网元之间的通信。该通信接口可以是收发器。In a possible implementation manner, the information transmission device includes a processor and a memory. The processor is configured to support the apparatus to perform the corresponding functions of the method of the seventh aspect described above. The memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device. Optionally, the information transmission device may further include a communication interface for supporting communication between the device and other network elements. The communication interface can be a transceiver.
在另一种可能的实现方式中,该信息传输装置包括:循环移位单元、映射单元和发送单元。其中,循环移位单元,用于根据波束指示信息,对第一符号组进行循环移位,得到第二符号组;其中,第一符号组是对原始数据比特进行调制后得到的符号组。映射单元,用于将第二符号组映射至时频资源上。发送单元,用于通过波束指示信息所指示的波束,向终端设备发送映射至时频资源上的第二符号组。In another possible implementation manner, the information transmission apparatus includes: a cyclic shift unit, a mapping unit, and a sending unit. The cyclic shift unit is configured to cyclically shift the first symbol group according to the beam indication information to obtain a second symbol group, where the first symbol group is a symbol group obtained by modulating the original data bits. a mapping unit, configured to map the second symbol group to the time-frequency resource. And a sending unit, configured to send, by using a beam indicated by the beam indication information, a second symbol group mapped to the time-frequency resource to the terminal device.
第八方面,本申请提供了一种信息传输方法和装置,该方法的执行主体可以是接收设备(例如终端),该方法可以包括以下步骤:首先,接收通过波束发送的映射至时频资源上的第二符号组;其中,第二符号组是根据波束指示信息对第一符号组进行循环移位后得到的符号组,第一符号组是对原始数据比特进行调制后得到的符号组,波束指示信息用于指示波束。从时频资源上,获取第二符号组。根据波束指示信息,对第二符号组进行循环移位逆操作,得到第一符号组。该技术方案中,终端设备在执行循环移位逆操作的过程中考虑了波束, 其相关内容的解释、相关步骤的具体实现方式,以及有益效果均可以参考上述循环移位逆操作方法。In an eighth aspect, the present application provides an information transmission method and apparatus, and an execution body of the method may be a receiving device (for example, a terminal), and the method may include the following steps: First, receiving a mapping sent by a beam to a time-frequency resource a second symbol group, wherein the second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information, where the first symbol group is a symbol group obtained by modulating the original data bits, and the beam group The indication information is used to indicate the beam. Obtain a second symbol group from the time-frequency resource. Performing a cyclic shift inverse operation on the second symbol group according to the beam indication information to obtain a first symbol group. In the technical solution, the terminal device considers the beam in the process of performing the cyclic shift inverse operation, and the explanation of the related content, the specific implementation manner of the related steps, and the beneficial effects can all refer to the cyclic shift inverse operation method.
相应的,还提供了一种信息传输装置,可以实现第八方面所述的信息传输方法。例如该装置可以是接收设备(如基站,或者终端等)。可以通过软件、硬件、或者通过硬件执行相应的软件实现上述方法。Correspondingly, an information transmission apparatus is further provided, which can implement the information transmission method described in the eighth aspect. For example, the device can be a receiving device (such as a base station, or a terminal, etc.). The above method can be implemented by software, hardware, or by executing corresponding software by hardware.
在一种可能的实现方式中,该信息传输装置包括处理器、存储器。该处理器被配置为支持该装置执行上述第八方面方法中相应的功能。存储器用于与处理器耦合,其保存该装置必要的程序(指令)和数据。可选的,该信息传输装置还可以包括通信接口,用于支持该装置与其他网元之间的通信。该通信接口可以是收发器。In a possible implementation manner, the information transmission device includes a processor and a memory. The processor is configured to support the apparatus to perform the corresponding functions of the method of the above eighth aspect. The memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device. Optionally, the information transmission device may further include a communication interface for supporting communication between the device and other network elements. The communication interface can be a transceiver.
在另一种可能的实现方式中,该信息传输装置包括接收单元、获取单元和循环移位逆操作单元。其中,接收单元,用于接收通过波束发送的映射至时频资源上的第二符号组;其中,第二符号组是根据波束指示信息对第一符号组进行循环移位后得到的符号组,第一符号组是对原始数据比特进行调制后得到的符号组,波束指示信息用于指示波束。获取单元,用于从时频资源上,获取第二符号组。循环移位逆操作单元,用于根据波束指示信息,对第二符号组进行循环移位逆操作,得到第一符号组。In another possible implementation manner, the information transmission apparatus includes a receiving unit, an acquiring unit, and a cyclic shift inverse operating unit. The receiving unit is configured to receive the second symbol group mapped to the time-frequency resource by using the beam, where the second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information, where The first symbol group is a symbol group obtained by modulating original data bits, and beam indication information is used to indicate a beam. An obtaining unit, configured to acquire a second symbol group from the time-frequency resource. And a cyclic shift inverse operation unit, configured to perform a cyclic shift inverse operation on the second symbol group according to the beam indication information, to obtain a first symbol group.
可选的接收单元还可以用于,通过RRC信令、MAC信令或DCI接收波束指示信息。The optional receiving unit may be further configured to receive beam indication information by using RRC signaling, MAC signaling, or DCI.
第九方面,还提供一种信息传输装置,所述装置包括In a ninth aspect, an information transmission apparatus is further provided, the apparatus comprising
加扰单元,用于根据波束指示信息,获取加扰后的比特序列;a scrambling unit, configured to obtain the scrambled bit sequence according to the beam indication information;
映射单元,用于将所述加扰后的比特序列经调制后映射至时频资源上;a mapping unit, configured to map the scrambled bit sequence to a time-frequency resource;
发送单元,用于通过所述波束指示信息所指示的波束,向终端设备发送映射至时频资源上的所述加扰后的比特序列。And a sending unit, configured to send, by using the beam indicated by the beam indication information, the scrambled bit sequence mapped to the time-frequency resource to the terminal device.
一种可能的设计中,所述加扰单元具体用于:In a possible design, the scrambling unit is specifically used to:
根据波束指示信息,获取加扰序列的初始化因子;Obtain an initialization factor of the scrambling sequence according to the beam indication information;
根据所述加扰序列的初始化因子,确定所述加扰序列;Determining the scrambling sequence according to an initialization factor of the scrambling sequence;
根据所述加扰序列,对待加扰比特序列进行加扰,得到加扰后的比特序列。The scrambling bit sequence is scrambled according to the scrambling sequence to obtain a scrambled bit sequence.
另一种可能的设计中,所述加扰单元在执行根据波束指示信息,获取加扰序列的初始化因子时,具体用于:In another possible design, the scrambling unit is configured to: when acquiring an initialization factor of the scrambling sequence according to the beam indication information, specifically:
根据波束指示信息、小区索引和时隙号,获取加扰序列的初始化因子。The initialization factor of the scrambling sequence is obtained according to the beam indication information, the cell index, and the slot number.
另一种可能的设计中,所述加扰单元在执行根据波束指示信息、小区索引和时隙号,获取加扰序列的初始化因子时,具体用于:In another possible design, when the scrambling unit performs the initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number, it is specifically used to:
根据公式
获取加扰序列的初始化因子c
init;其中,
表示向下取整,n
s表示时隙号,
表示小区索引,offset表示与所述波束指示信息相关的一个值。
According to the formula Obtain the initialization factor c init of the scrambling sequence; where Indicates rounding down, n s is the slot number, Indicates a cell index, and offset represents a value associated with the beam indication information.
另一种可能的设计中,所述发送单元还用于:通过无线资源控制RRC信令、媒体访问控制MAC信令或下行控制信息DCI向所述终端设备发送所述波束指示信息。In another possible design, the sending unit is further configured to: send the beam indication information to the terminal device by using radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
第十方面,还提供一种信息传输装置,所述装置包括:In a tenth aspect, an information transmission apparatus is further provided, the apparatus comprising:
接收单元,用于接收通过波束发送的映射至时频资源上的加扰后的比特序列;其中,所述加扰后的比特序列是根据波束指示信息确定的比特序列,所述波束指示信息 用于指示所述波束;a receiving unit, configured to receive, by using a beam, a mapped bit sequence that is mapped to a time-frequency resource; wherein the scrambled bit sequence is a bit sequence determined according to beam indication information, where the beam indication information is used by Indicating the beam;
获取单元,用于从所述时频资源上,获取所述加扰后的比特序列;An acquiring unit, configured to acquire the scrambled bit sequence from the time-frequency resource;
解扰单元,用于根据所述波束指示信息,对所述加扰后的比特序列进行解扰。And a descrambling unit, configured to descramble the scrambled bit sequence according to the beam indication information.
一种可能的设计中,所述解扰单元具体用于:In a possible design, the descrambling unit is specifically configured to:
根据所述波束指示信息,获取加扰序列的初始化因子;Obtaining an initialization factor of the scrambling sequence according to the beam indication information;
根据所述加扰序列的初始化因子,确定所述加扰序列;Determining the scrambling sequence according to an initialization factor of the scrambling sequence;
根据所述加扰序列,对所述加扰后的比特序列进行解扰。Decoding the scrambled bit sequence according to the scrambling sequence.
另一种可能的设计中,所述解扰单元在执行所述根据所述波束指示信息,获取加扰序列的初始化因子时,具体用于:In another possible design, the descrambling unit is configured to: when performing the initializing factor of the scrambling sequence according to the beam indication information, specifically:
根据所述波束指示信息、小区索引和时隙号,获取加扰序列的初始化因子。An initialization factor of the scrambling sequence is obtained according to the beam indication information, the cell index, and the slot number.
另一种可能的设计中,所述解扰单元在执行根据所述波束指示信息、小区索引和时隙号,获取加扰序列的初始化因子时,具体用于:In another possible design, the descrambling unit is configured to: when performing the initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number, specifically:
根据公式
获取加扰序列的初始化因子c
init;其中,
表示向下取整,n
s表示时隙号,
表示小区索引,offset表示与所述波束指示信息相关的一个值。
According to the formula Obtain the initialization factor c init of the scrambling sequence; where Indicates rounding down, n s is the slot number, Indicates a cell index, and offset represents a value associated with the beam indication information.
另一种可能的设计中,所述接收单元还用于:通过无线资源控制RRC信令、媒体访问控制MAC信令或下行控制信息DCI接收所述波束指示信息。In another possible design, the receiving unit is further configured to: receive the beam indication information by using radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
第十一方面,还提供一种信息传输装置,其特征在于,所述装置包括:In an eleventh aspect, an information transmission apparatus is further provided, wherein the apparatus comprises:
循环移位单元,用于根据波束指示信息,对第一符号组进行循环移位,得到第二符号组;其中,所述第一符号组是对原始数据比特进行调制后得到的符号组;a cyclic shifting unit, configured to cyclically shift the first symbol group according to the beam indication information to obtain a second symbol group; wherein the first symbol group is a symbol group obtained by modulating the original data bits;
映射单元,用于将所述第二符号组映射至时频资源上;a mapping unit, configured to map the second symbol group to a time-frequency resource;
发送单元,用于通过所述波束指示信息所指示的波束,向终端设备发送映射至时频资源上的所述第二符号组。And a sending unit, configured to send, by using the beam indicated by the beam indication information, the second symbol group mapped to the time-frequency resource to the terminal device.
一种可能的设计中,所述循环移位单元具体用于:根据波束指示信息和小区索引,对第一符号组进行循环移位,得到第二符号组。In a possible design, the cyclic shift unit is specifically configured to cyclically shift the first symbol group according to the beam indication information and the cell index to obtain a second symbol group.
另一种可能的设计中,所述循环移位单元在执行所述根据波束指示信息和小区索引,对第一符号组进行循环移位,得到第二符号组上,具体用于:In another possible design, the cyclic shift unit performs cyclic shifting on the first symbol group according to the beam indication information and the cell index to obtain a second symbol group, specifically for:
根据公式
得到第二符号组;其中,w(i)表示第一符号组中的第i个元素,
表示第二符号组中的第i个元素,所述
表示小区索引,offset表示与所述波束指示信息相关的一个值。
According to the formula Obtaining a second symbol group; wherein w(i) represents an ith element in the first symbol group, Representing the i-th element in the second symbol group, Indicates a cell index, and offset represents a value associated with the beam indication information.
另一种可能的设计中,其特征在于,Another possible design is characterized in that
所述发送单元还用于:通过无线资源控制RRC信令、媒体访问控制MAC信令或下行控制信息DCI向所述终端设备发送所述波束指示信息。The sending unit is further configured to: send the beam indication information to the terminal device by using radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
第十二方面,还提供一种信息传输装置,其特征在于,所述装置包括:According to a twelfth aspect, an information transmission device is provided, characterized in that the device comprises:
接收单元,用于接收通过波束发送的映射至时频资源上的第二符号组;其中,所述第二符号组是根据波束指示信息对第一符号组进行循环移位后得到的符号组,所述第一符号组是对原始数据比特进行调制后得到的符号组,所述波束指示信息用于指示所述波束;a receiving unit, configured to receive a second symbol group that is transmitted by using a beam to be mapped to a time-frequency resource, where the second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to beam indication information, where The first symbol group is a symbol group obtained by modulating original data bits, and the beam indication information is used to indicate the beam;
获取单元,用于从所述时频资源上,获取所述第二符号组;An acquiring unit, configured to acquire the second symbol group from the time-frequency resource;
循环移位逆操作单元,用于根据所述波束指示信息,对所述第二符号组进行循环移位逆操作,得到所述第一符号组。And a cyclic shift inverse operation unit, configured to perform a cyclic shift inverse operation on the second symbol group according to the beam indication information, to obtain the first symbol group.
一种可能的设计中,所述循环移位逆操作单元具体用于:根据所述波束指示信息和小区索引,对所述第二符号组进行循环移位逆操作,得到所述第一符号组。In a possible design, the cyclic shift inverse operation unit is specifically configured to perform a cyclic shift inverse operation on the second symbol group according to the beam indication information and a cell index, to obtain the first symbol group. .
另一种可能的设计中,所述循环移位逆操作单元在执行所述根据所述波束指示信息和小区索引,对所述第二符号组进行循环移位逆操作,得到所述第一符号组时,具体用于:In another possible design, the cyclic shift inverse operation unit performs a cyclic shift inverse operation on the second symbol group according to the beam indication information and the cell index, to obtain the first symbol. When used in groups, it is specifically used to:
根据公式
得到所述第一符号组;其中,
表示所述第二符号组中的第i个元素,w(i)表示所述第一符号组中的第i个元素,所述
表示小区索引,offset表示与所述波束指示信息相关的一个值。
According to the formula Obtaining the first symbol group; wherein Representing an i-th element in the second symbol group, w(i) representing an i-th element in the first symbol group, Indicates a cell index, and offset represents a value associated with the beam indication information.
另一种可能的设计中,所述接收单元还用于:通过无线资源控制RRC信令、媒体访问控制MAC信令或下行控制信息DCI接收所述波束指示信息。In another possible design, the receiving unit is further configured to: receive the beam indication information by using radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
基于上文提供的任一方面或任一方面提供的任一种可能的实现方式,波束指示信息可以包括以下信息中的至少一种:波束的相对编号,波束的逻辑编号,波束的物理编号,端口号、准共址QCL信息、波束对连接信息,终端设备组,波束对应的时域符号,同步块SS block的编号;其中,每个波束对应的终端设备为一个终端设备组。其中,关于offset与波束指示信息之间的相关方式可以参考具体实施方式,此处不再赘述。The beam indication information may include at least one of the following information: the relative number of the beam, the logical number of the beam, the physical number of the beam, based on any of the possible implementations provided by any of the aspects or any of the aspects provided above. The port number, the quasi-co-located QCL information, the beam pair connection information, the terminal device group, the time domain symbol corresponding to the beam, and the number of the synchronization block SS block; wherein the terminal device corresponding to each beam is a terminal device group. For the manner of the correlation between the offset and the beam indication information, reference may be made to the specific implementation manner, and details are not described herein again.
本申请还提供了一种计算机存储介质,其上储存有计算机程序(指令),该程序(指令)用于执行上述任一方面所述的方法。The application also provides a computer storage medium having stored thereon a computer program (instruction) for performing the method of any of the above aspects.
本申请还提供了一种计算机程序产品,当其在计算机上运行时,使得计算机执行上述任一方面所述的方法。The application also provides a computer program product, when run on a computer, causing the computer to perform the method of any of the above aspects.
可以理解地,上述提供的任一种装置或计算机存储介质或计算机程序产片均用于执行上文所提供的对应的方法,因此,其所能达到的有益效果可参考上文所提供的对应的方法中的有益效果,此处不再赘述。It can be understood that any of the devices or computer storage media or computer program provided above are used to perform the corresponding methods provided above, and therefore, the beneficial effects that can be achieved can be referred to the corresponding correspondence provided above. The beneficial effects of the method are not repeated here.
图1为现有技术提供的一种LTE系统中基站对PDCCH的处理流程的示意图;1 is a schematic diagram of a process flow of a PDCCH by a base station in an LTE system provided by the prior art;
图2为现有技术提供的一种LTE系统中UE对PDCCH的处理流程的示意图;2 is a schematic diagram of a process flow of a UE to a PDCCH in an LTE system according to the prior art;
图3为本申请实施例提供的技术方案所适用的一种系统架构的示意图;3 is a schematic diagram of a system architecture applicable to the technical solution provided by the embodiment of the present application;
图4为本申请实施例提供的一种网络设备的结构示意图;FIG. 4 is a schematic structural diagram of a network device according to an embodiment of the present application;
图5为本申请实施例提供的一种终端设备的结构示意图;FIG. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure;
图6为本申请实施例提供的技术方案所适用的一种场景的示意图;FIG. 6 is a schematic diagram of a scenario to which the technical solution provided by the embodiment of the present application is applicable;
图7为本申请实施例提供的技术方案所适用的另一种场景的示意图;FIG. 7 is a schematic diagram of another scenario to which the technical solution provided by the embodiment of the present application is applicable;
图8为本申请实施例提供的一种信息传输方法的流程示意图;FIG. 8 is a schematic flowchart diagram of an information transmission method according to an embodiment of the present application;
图9为本申请实施例提供的一种基站执行加扰操作的流程示意图;FIG. 9 is a schematic flowchart of a base station performing a scrambling operation according to an embodiment of the present disclosure;
图9a为本申请实施例提供的一种波束指示信息的示意图;FIG. 9 is a schematic diagram of beam indication information according to an embodiment of the present disclosure;
图9b为本申请实施例提供的另一种波束指示信息的示意图;FIG. 9b is a schematic diagram of another beam indication information according to an embodiment of the present disclosure;
图9c为本申请实施例提供的另一种波束指示信息的示意图;FIG. 9c is a schematic diagram of another beam indication information according to an embodiment of the present disclosure;
图9d为本申请实施例提供的另一种波束指示信息的示意图;FIG. 9 is a schematic diagram of another beam indication information according to an embodiment of the present disclosure;
图9e为本申请实施例提供的另一种波束指示信息的示意图;FIG. 9 e is a schematic diagram of another beam indication information according to an embodiment of the present disclosure;
图9f为本申请实施例提供的另一种波束指示信息的示意图;FIG. 9 is a schematic diagram of another beam indication information according to an embodiment of the present disclosure;
图9g为本申请实施例提供的另一种波束指示信息的示意图;FIG. 9g is a schematic diagram of another beam indication information according to an embodiment of the present disclosure;
图10为本申请实施例提供的另一种信息传输方法的流程示意图;FIG. 10 is a schematic flowchart diagram of another information transmission method according to an embodiment of the present disclosure;
图11为本申请实施例提供的一种UE执行解扰操作的流程示意图;FIG. 11 is a schematic flowchart of a UE performing a descrambling operation according to an embodiment of the present disclosure;
图12为本申请实施例提供的另一种信息传输方法的流程示意图;FIG. 12 is a schematic flowchart diagram of another information transmission method according to an embodiment of the present disclosure;
图13为本申请实施例提供的一种基站执行循环移位操作的流程示意图;FIG. 13 is a schematic flowchart of a base station performing a cyclic shift operation according to an embodiment of the present disclosure;
图14为本申请实施例提供的另一种信息传输方法的流程示意图;FIG. 14 is a schematic flowchart diagram of another information transmission method according to an embodiment of the present disclosure;
图15为本申请实施例提供的一种UE执行循环移位逆操作的流程示意图;FIG. 15 is a schematic flowchart of a UE performing a cyclic shift inverse operation according to an embodiment of the present disclosure;
图16为本申请实施例提供的一种信息传输装置的结构示意图;FIG. 16 is a schematic structural diagram of an information transmission apparatus according to an embodiment of the present application;
图17为本申请实施例提供的另一种信息传输装置的结构示意图;FIG. 17 is a schematic structural diagram of another information transmission apparatus according to an embodiment of the present disclosure;
图18为本申请实施例提供的另一种信息传输装置的结构示意图;FIG. 18 is a schematic structural diagram of another information transmission apparatus according to an embodiment of the present disclosure;
图19为本申请实施例提供的另一种信息传输装置的结构示意图;FIG. 19 is a schematic structural diagram of another information transmission apparatus according to an embodiment of the present disclosure;
图20为本申请实施例提供的另一种信息传输装置的结构示意图。FIG. 20 is a schematic structural diagram of another information transmission apparatus according to an embodiment of the present application.
首先,对本申请涉及的相关技术及相关术语进行简单介绍,以方便理解:First of all, the related technologies and related terms involved in this application are briefly introduced to facilitate understanding:
1)传输控制信道的时域资源1) Time domain resources for transmitting control channels
LTE系统中,信道是以无线帧(radio frame)为单位进行传输的。一个无线帧包括10个子帧(subframe),每个子帧的长度为1毫秒(ms),每个子帧包括两个时隙(slot),每个slot为0.5ms。每个slot包括的符号的个数与子帧中循环前缀(cyclic prefix,CP)的长度相关。若CP为普通(normal)CP,则每个slot包括7个符号,每个子帧由14个符号组成,例如,每个子帧可以由序号分别为#0,#1,#2,#3,#4,#5,#6,#7,#8,#9,#10,#11,#12,#13的符号组成。若CP为长(extended)CP,则每个slot包括6个符号,每个子帧由12个符号组成,例如,每个子帧可以由序号分别为#0,#1,#2,#3,#4,#5,#6,#7,#8,#9,#10,#11的符号组成。这里的“符号”是指正交频分多址(orthogonal frequency division multiplexing,OFDM)符号。In the LTE system, channels are transmitted in units of radio frames. A radio frame includes 10 subframes, each of which has a length of 1 millisecond (ms), and each subframe includes two slots, each slot being 0.5 ms. The number of symbols included in each slot is related to the length of the cyclic prefix (CP) in the subframe. If the CP is a normal CP, each slot includes 7 symbols, and each subframe is composed of 14 symbols. For example, each subframe can be numbered by #0, #1, #2, #3,# 4, #5, #6, #7, #8, #9, #10, #11, #12, #13 symbol composition. If the CP is an extended CP, each slot includes 6 symbols, and each subframe is composed of 12 symbols. For example, each subframe can be numbered by #0, #1, #2, #3,# 4, #5, #6, #7, #8, #9, #10, #11 symbol composition. The "symbol" herein refers to an orthogonal frequency division multiplexing (OFDM) symbol.
LTE系统中,PDCCH通常在一个子帧的第一个或前两个或前三个OFDM符号上传输,这些OFDM符号可以被称为控制符号。例如,若LTE系统的带宽为1.4兆赫兹(MHz),则可以在第{2,3,4}个OFDM符号上传输PDCCH。In an LTE system, a PDCCH is typically transmitted on the first or first two or first three OFDM symbols of a subframe, which may be referred to as control symbols. For example, if the bandwidth of the LTE system is 1.4 megahertz (MHz), the PDCCH may be transmitted on the {2, 3, 4} OFDM symbols.
2)传输控制信道的时频资源2) Time-frequency resources for transmitting control channels
LTE系统中,资源单元(resource element,RE)是最小的时频资源单元。RE可以由索引对(k,l)唯一标识,其中,k为子载波索引,l为符号索引。4个连续的RE(其中,不计算参考信号所占用的RE)构成1个资源元素组(resource element group,REG)。REG可以由索引对(k’,l’)标识。In an LTE system, a resource element (RE) is a minimum time-frequency resource unit. The RE may be uniquely identified by an index pair (k, l), where k is the subcarrier index and l is the symbol index. Four consecutive REs (where the RE occupied by the reference signal are not counted) constitute one resource element group (REG). The REG can be identified by an index pair (k', l').
传输控制信道时,承载控制信道的时频资源的基本单位是控制信道元素(control channel element,CCE)。一个CCE包含9个REG。PDCCH可以采用不同的聚合级别(aggregation level,AL)进行传输。其中聚合级别是指PDCCH承载在多少个CCE。聚合级别可以为1,2,4,8,例如聚合级别为2是指PDCCH承载在2个CCE上。When the control channel is transmitted, the basic unit of the time-frequency resource carrying the control channel is a control channel element (CCE). A CCE contains 9 REGs. The PDCCH can be transmitted using different aggregation levels (AL). The aggregation level refers to how many CCEs the PDCCH carries. The aggregation level can be 1, 2, 4, 8. For example, the aggregation level is 2, which means that the PDCCH is carried on two CCEs.
3)PDCCH可使用的时频资源3) Time-frequency resources that PDCCH can use
PDCCH所在的符号(其中,在LTE系统中,该符号一般是指第一个符号)对应的时频资源上还可能承载以下信息:参考信号(reference signal,RS),物理控制帧格式指示信道(physical control formation indication channel,PCFICH),物理HARQ指示信道(physical HARQ indication channel,PHICH);其中,HARQ是自动混合重传请求(hybrid automatic repeat request)的英文缩写。The time-frequency resource corresponding to the symbol in which the PDCCH is located (in the LTE system, the symbol generally refers to the first symbol) may also carry the following information: a reference signal (RS), and a physical control frame format indication channel ( Physical control formation indication channel (PCFICH), physical HARQ indication channel (PHICH); wherein HARQ is an abbreviation of hybrid automatic repeat request.
其中,PCFICH携带控制格式指示(control format indication,CFI)信息,CFI信息用于通知用户设备(user equipment,UE)控制信道所占的符号数。CFI信息可以被UE用来计算控制信道所占的总资源数。CFI信息也可以被UE用来确定数据信道在时域上的起始位置,即从第几个符号开始是数据信道。PCFICH是一个广播性质的信道。基站会在一个子帧的第一个符号上发送PCFICH。PCFICH本身的配置由其他信令通知。The PCFICH carries control format indication (CFI) information, and the CFI information is used to notify the user equipment (UE) of the number of symbols occupied by the control channel. The CFI information can be used by the UE to calculate the total number of resources occupied by the control channel. The CFI information can also be used by the UE to determine the starting position of the data channel in the time domain, i.e. from the first few symbols is the data channel. The PCFICH is a broadcast channel. The base station will send the PCFICH on the first symbol of a subframe. The configuration of the PCFICH itself is notified by other signaling.
其中,UE如果发送了上行数据,那么,该UE会期待基站对该上行数据是否被正确接收做出反馈。PHICH可以用来做UE上行数据的HARQ反馈。PHICH是一个组播性质的信道。基站可以在一个子帧的第一个OFDM符号上发送PHICH。PHICH本身的配置由承载在物理广播信道(physical broadcast channel,PBCH)的主消息块(master information block,MIB)通知。If the UE sends uplink data, the UE may expect the base station to provide feedback on whether the uplink data is correctly received. The PHICH can be used to perform HARQ feedback of UE uplink data. PHICH is a multicast channel. The base station can transmit the PHICH on the first OFDM symbol of one subframe. The configuration of the PHICH itself is notified by a master information block (MIB) carried on a physical broadcast channel (PBCH).
控制信道所占的符号对应的总REG数由符号数和带宽决定。该总REG数减去被PCFICH和PHICH占用的时频资源,即PDCCH可使用的时频资源。The total number of REGs corresponding to the symbols occupied by the control channel is determined by the number of symbols and the bandwidth. The total REG number is subtracted from the time-frequency resource occupied by the PCFICH and the PHICH, that is, the time-frequency resource that the PDCCH can use.
4)搜索空间4) Search space
为了降低UE的复杂度,LTE系统中定义了两种搜索空间,分别是公共搜索空间和UE专用搜索空间。在公共搜索空间中,PDCCH的聚合级别可为4,8。在UE专用搜索空间中,PDCCH聚合级别可为1,2,4,8。LTE中规定一个PDCCH只能由连续的n个CCE构成,并只能以第i个CCE作为起始位置,其中i mod n=0。In order to reduce the complexity of the UE, two search spaces are defined in the LTE system, which are a common search space and a UE-specific search space. In the common search space, the aggregation level of the PDCCH may be 4, 8. In the UE-specific search space, the PDCCH aggregation level may be 1, 2, 4, 8. In LTE, a PDCCH can only be composed of consecutive n CCEs, and only the i-th CCE can be used as a starting position, where i mod n=0.
5)随机化(randomization)5) Randomization
在移动通信系统中,小区之间(或基站之间)的干扰是限制性能的重要因素。其中,下文中不再区分小区之间的干扰和基站之间的干扰。尤其的,在基于OFDM的蜂窝通信系统,如LTE,5G等系统中,由于小区布网密集,因此小区间干扰强度大,且干扰源不易确定,从而影响接收端的接收性能。In mobile communication systems, interference between cells (or between base stations) is an important factor limiting performance. Among them, the interference between cells and the interference between base stations are no longer distinguished in the following. In particular, in an OFDM-based cellular communication system, such as LTE, 5G, etc., since the cell deployment is dense, the inter-cell interference strength is large, and the interference source is difficult to determine, thereby affecting the reception performance of the receiving end.
为了解决这个问题,LTE系统中,在不同小区之间的采用了多种干扰随机化技术,以尽量将干扰白噪声化,从而能在接收端实现更好的干扰抑制。其中,干扰随机化技术包括交织、加扰、循环移位等。也就是说,随机化可以理解为:在干扰的强度较大,干扰源不易确定时,采用统计的方法将干扰“白噪声”化。In order to solve this problem, in the LTE system, multiple interference randomization techniques are adopted between different cells to minimize interference white noise, so that better interference suppression can be achieved at the receiving end. Among them, interference randomization techniques include interleaving, scrambling, cyclic shifting, and the like. That is to say, randomization can be understood as: when the intensity of the interference is large and the interference source is difficult to determine, the statistical method is used to make the interference "white noise".
6)符号组6) Symbol group
符号组,是指多个调制符号构成的集合。其中,调制符号是指经调制后得到的符号。本申请对调制方式不进行限定,例如,若调制方式是正交相移键控(quadrature phase shift keyin,QPSK)调制,则调制符号是指QPSK符号;若调制方式是正交幅度调制(quadrature amplitude modulation,QAM),则调制符号是指QAM符号。A symbol group refers to a collection of a plurality of modulation symbols. Wherein, the modulation symbol refers to a symbol obtained after modulation. The modulation mode is not limited in this application. For example, if the modulation mode is quadrature phase shift keying (QPSK) modulation, the modulation symbol refers to QPSK symbol; if the modulation mode is quadrature amplitude modulation (quadrature amplitude) Modulation, QAM), the modulation symbol refers to the QAM symbol.
本领域技术人员可以理解的,根据前后文的描述,应当能够清楚地获知本申请中的“符号”是指OFDM符号,还是调制符号。例如,“符号序列”中的“符号”是指调制符号,“符号组”中的“符号”也是指调制符号。“占用的符号”中的“符号”是指OFDM符号。It will be understood by those skilled in the art that, according to the description above, it should be clearly understood that the "symbol" in this application refers to an OFDM symbol or a modulation symbol. For example, "symbol" in "symbol sequence" refers to a modulation symbol, and "symbol" in a "symbol group" also refers to a modulation symbol. The "symbol" in "occupied symbol" refers to an OFDM symbol.
7)波束(beam)和波束对(beam pair link)7) Beam and beam pair link
波束是一种通信资源。波束可以是宽波束,或者窄波束,或者其他类型波束。形成波束的技术可以是波束成形技术或者其他技术手段。波束成形(beamforming)技术可以具体为数字波束成形技术、模拟波束成形技术、或混合波束成形技术。不同的波束可以认为是不同的资源。通过不同的波束可以发送相同的信息或者不同的信息。可选的,可以将具有相同或者类似的通信特征的多个波束视为是一个波束。一个波束内可以包括一个或多个天线端口,用于传输数据信道、控制信道和探测信号等。例如,发射波束可以是指信号经天线发射出去后在空间不同方向上形成的信号强度的分布。接收波束可以是指从天线上接收到的无线信号在空间不同方向上的信号强度分布。可以理解的是,形成一个波束的一个或多个天线端口也可以看作是一个天线端口集。A beam is a communication resource. The beam can be a wide beam, or a narrow beam, or other type of beam. The beamforming technique can be beamforming techniques or other technical means. The beamforming technique may be specifically a digital beamforming technique, an analog beamforming technique, or a hybrid beamforming technique. Different beams can be considered as different resources. The same information or different information can be transmitted through different beams. Alternatively, multiple beams having the same or similar communication characteristics can be considered as one beam. One or more antenna ports may be included in one beam for transmitting data channels, control channels, sounding signals, and the like. For example, a transmit beam may refer to a distribution of signal strengths that are formed in different directions of space after the signal is transmitted through the antenna. The receive beam may refer to a signal strength distribution of wireless signals received from the antenna in different directions in space. It can be understood that one or more antenna ports forming one beam can also be regarded as one antenna port set.
波束对建立在波束的概念上。一个波束对通常包括一个发送端的发送波束和一个接收端的接收波束。需要说明的是,下文中的“波束”均是指基站的发送波束,对于UE的接收波束,本申请对此不进行限定。The beam pair is built on the concept of the beam. A beam pair typically includes a transmit beam at the transmitter and a receive beam at the receiver. It should be noted that the “beam” in the following refers to the transmit beam of the base station, and the present invention does not limit the receive beam of the UE.
8)其他术语8) Other terms
本文中的术语“多个”是指两个或两个以上。The term "plurality" as used herein refers to two or more.
本文中的术语“第一”、“第二”等仅是为了区分不同的对象,并不对其顺序进行限定。例如,第一符号组和第二符号组仅仅是为了区分不同的符号组,并不对其先后顺序进行限定。The terms "first", "second", etc. are used herein to distinguish different objects and are not intended to limit the order. For example, the first symbol group and the second symbol group are merely for distinguishing different symbol groups, and their order is not limited.
本文中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本文中字符“/”,一般表示前后关联对象是一种“或”的关系;在公式中,字符“/”,表示前后关联对象是一种“相除”的关系。The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship; in the formula, the character "/" indicates that the contextual object is a "divide" relationship.
下面说明LTE系统中,基站和UE对PDCCH的处理流程:The following describes the processing flow of the PDCCH by the base station and the UE in the LTE system:
如图1所示,为LTE系统中基站对PDCCH的处理流程的示意图,具体可以包括以下步骤S101~S113:As shown in FIG. 1 , it is a schematic diagram of a process flow of a PDCCH by a base station in an LTE system, and specifically includes the following steps S101 to S113:
S101:基站确定原始数据比特。本实施例中以基站发送PDCCH为基站在第k个子帧向UE发送下行控制信息(downlink control information,DCI)为例。该情况下,原始数据比特是该DCI。S101: The base station determines original data bits. In this embodiment, the base station sends the PDCCH as an example in which the base station sends downlink control information (DCI) to the UE in the kth subframe. In this case, the original data bits are the DCI.
S102:基站为原始数据比特添加CRC,其中,CRC的长度可以是由协议定义的。S102: The base station adds a CRC to the original data bit, where the length of the CRC may be defined by a protocol.
基站执行S102后得到的比特序列可以表示为:c
0,c
1,c
2,c
3,...,c
K-1。其中,K表示添加CRC后得到的比特序列的长度。
The bit sequence obtained by the base station after performing S102 can be expressed as: c 0 , c 1 , c 2 , c 3 , ..., c K-1 . Where K represents the length of the bit sequence obtained after adding the CRC.
S103:基站对添加CRC后得到的比特序列,进行信道编码。S103: The base station performs channel coding on the bit sequence obtained after adding the CRC.
信道编码是通信系统中最重要的组成部分之一,可以为信息比特的传输提供检错和纠错能力。LTE中对控制信道的编码可以采用咬尾卷积码(tail-biting convolutional coding TBCC)等,5G新空口(new radio,NR)中对控制信道的编码可以采用Polar码等。本申请对此不进行限定。Channel coding is one of the most important components of a communication system and provides error detection and error correction for the transmission of information bits. In the LTE, the coding of the control channel may be a tail-biting convolutional coding (TBCC), and the encoding of the control channel in the 5G new radio (NR) may be a Polar code or the like. This application does not limit this.
S104:基站对信道编码后得到的比特序列,进行速率匹配。S104: The base station performs rate matching on the bit sequence obtained after channel coding.
速率匹配是指将需要传输的比特数目(即信道编码后得到的比特序列的比特数目)匹配成所分配的资源能够承载的比特数目。常用的速率匹配方法可以包括重发、截断、打孔等。Rate matching refers to matching the number of bits that need to be transmitted (ie, the number of bits of the bit sequence obtained after channel coding) to the number of bits that the allocated resource can carry. Commonly used rate matching methods may include retransmission, truncation, puncturing, and the like.
S105:基站对速率匹配后得到的比特序列,进行CCE聚合。S105: The base station performs CCE aggregation on the bit sequence obtained after the rate matching.
系统中CCE总数为
其中,
表示向下取整。N
REG表示PDCCH可传输的REG总数,即除PHICH和PCFICH占用的REG之外的REG总数。由上述描述可知,一个PDCCH可以在{1,2,4,8}个CCE聚合传输。每个CCE上可以映射72比特的信息。
The total number of CCEs in the system is among them, Indicates rounding down. N REG represents the total number of REGs that the PDCCH can transmit, that is, the total number of REGs other than the REG occupied by the PHICH and the PCFICH. As can be seen from the above description, one PDCCH can be aggregated and transmitted in {1, 2, 4, 8} CCEs. 72 bits of information can be mapped on each CCE.
S106:基站对CCE聚合后得到的比特序列与其他PDCCH进行资源复用。其中,复用是指将多个PDCCH在相同的资源上传输。S106: The base station performs resource multiplexing on the bit sequence obtained by the CCE aggregation with other PDCCHs. The multiplexing refers to transmitting multiple PDCCHs on the same resource.
其中,该其他PDCCH可以与S101中的PDCCH可以是同一个发送给同一个UE的PDCCH,也可以是发送给不同UE的PDCCH。The PDCCH may be the same PDCCH that is sent to the same UE as the PDCCH in S101, or may be a PDCCH that is sent to different UEs.
例如,假设第i个PDCCH的比特序列长度为
并将该比特序列表示为
那么,基站对n
PDCCH个PDCCH进行资源复用之后得到的比特序列可以为:
为了表达的简洁,本申请中将这个序列定义为b(i),b(i)的总长度为
For example, assume that the bit sequence length of the i th PDCCH is And represent the bit sequence as Then, the bit sequence obtained after the base station performs resource multiplexing on the n PDCCH PDCCHs may be: For the sake of brevity of expression, this sequence is defined in this application as b(i), and the total length of b(i) is
示例的,CCEn,即第n个CCE,上映射的比特序列可以为:b(72*n),b(72*n+1),…,b(72*n+71)。如果有CCE没有被占用,对应添加<NIL>。For example, CCEn, that is, the nth CCE, the mapped bit sequence may be: b(72*n), b(72*n+1), ..., b(72*n+71). If there is a CCE that is not occupied, add <NIL>.
S107:基站对资源复用后得到的比特序列进行加扰。S107: The base station scrambles the bit sequence obtained after resource multiplexing.
加扰是指用一个序列(即加扰序列)对另一个序列(即待加扰比特序列)进行模二加操作,从而随机化相邻小区之间的干扰。在LTE协议中,按照如下公式进行加扰:Scrambling refers to modulo-adding another sequence (ie, the sequence of bits to be scrambled) with one sequence (ie, a scrambling sequence) to randomize interference between neighboring cells. In the LTE protocol, scrambling is performed according to the following formula:
其中,
表示加扰后得到的比特序列,b(i)表示待加扰比特序列,即为上述S106的示例中所描述的b(i),c(i)表示加扰序列。加扰序列c(i)可以是一个与小区ID(cell ID)和slot号n
s相关的序列。其中,小区ID是指UE所在小区的小区ID,n
s是指传输该PDCCH时所使用的slot的编码。可选的,加扰序列c(i)的初始化因子c
init是一个与小区ID和slot号n
s相关的值。具体的:
among them, Representing the bit sequence obtained after scrambling, b(i) represents the bit sequence to be scrambled, that is, b(i) described in the above example of S106, and c(i) represents the scrambling sequence. The scrambling sequence c(i) may be a sequence associated with a cell ID (cell ID) and a slot number n s . The cell ID refers to the cell ID of the cell where the UE is located, and n s refers to the code of the slot used when transmitting the PDCCH. Optionally, the initialization factor c init of the scrambling sequence c(i) is a value associated with the cell ID and the slot number n s . specific:
S108:基站对加扰后得到的比特序列进行调制。S108: The base station modulates the bit sequence obtained after the scrambling.
LTE系统中,对PDCCH的调制一般采用QPSK调制方式,即将2个比特调制成一个QPSK符号,本申请对具体的调制方式不进行限定。对S107中得到的
进行调制后,得到符号序列d(m)。
In the LTE system, the modulation of the PDCCH is generally performed by using a QPSK modulation scheme, that is, two bits are modulated into one QPSK symbol, and the specific modulation method is not limited in this application. Obtained in S107 After modulation, a symbol sequence d(m) is obtained.
S109:基站对调制后得到的符号序列进行层映射(layer mapping)和预编码(precoding)。S109: The base station performs layer mapping and precoding on the symbol sequence obtained after the modulation.
其中,预编码是可选的步骤,为了表示的简洁,下文中的具体示例中均是在不考虑这一步骤的基础上描述的。本申请对S109的具体实现方式不进行限定。以一个天线端口为例,将对符号序列d(m)执行层映射和预编码后得到的符号序列标记为y(m)。Among them, precoding is an optional step, and for the sake of simplicity of the description, the specific examples below are described on the basis of not considering this step. This application does not limit the specific implementation of S109. Taking an antenna port as an example, the symbol sequence obtained by performing layer mapping and precoding on the symbol sequence d(m) is marked as y(m).
S110:基站对预编码后得到的符号序列进行交织和循环移位。S110: The base station interleaves and cyclically shifts the symbol sequence obtained after precoding.
在LTE系统中,交织和循环移位操作是以四联组(quadruplet)为单位进行的。以一个天线端口为例,一个四联组z(i)=<y(4i),y(4i+1),y(4i+2),y(4i+3)>。四联组序列可以表示为z(0),z(1),z(2),z(3)……。交织和循环移位是以四联组序列为对象进行的。假设将基站对四联组序列进行交织操作后,该四联组序列中的元素z(i)得到的信息标记为w(i),那么,基站对四联组序列z(0),z(1),z(2),z(3)……执行交织操作之后,得到的信息可以被标记为w(0),w(1),w(2),w(3)……In the LTE system, the interleaving and cyclic shifting operations are performed in units of quadruplets. Taking an antenna port as an example, a quadruple group z(i)=<y(4i), y(4i+1), y(4i+2), y(4i+3)>. The quadruple sequence can be expressed as z(0), z(1), z(2), z(3).... Interleaving and cyclic shifting are performed on a quadruple sequence. Assuming that the base station interleaves the quadruplet sequence, the information obtained by the element z(i) in the quadruplet sequence is marked as w(i), then the base station pairs the quadruplet sequence z(0), z( 1), z(2), z(3)... After performing the interleaving operation, the obtained information can be marked as w(0), w(1), w(2), w(3)...
循环移位与cell ID相关。基站对四联组序列中的元素w(i)执行循环移位操作后得到的信 息标记为
则:
The cyclic shift is related to the cell ID. The information obtained by the base station after performing the cyclic shift operation on the element w(i) in the quadruplet sequence is marked as then:
其中,M
quad表示四联组的数目,M
quad表示QPSK符号数除以4,即:M
quad=M
symb/4。
Wherein, M quad represents the number of quadruplets, M quad represent QPSK symbol number is divided by 4, i.e.: M quad = M symb / 4 .
S111:基站按照先时域后频域的映射规则,对循环移位后得到的符号序列进行资源映射。S111: The base station performs resource mapping on the symbol sequence obtained after the cyclic shift according to the mapping rule of the frequency domain after the time domain.
资源映射是指将符号序列映射至时频资源上。以一个天线端口为例,资源映射是指将
映射至该端口对应的REG(k’,l’)上。在LTE系统中,映射规则是先时域后频域,例如,以控制信道占用3个符号为例,资源映射具体可以为:基站将
映射至REG(0,0),将
映射至REG(0,1),将
映射至REG(0,2),将
映射至REG(1,0)……
Resource mapping refers to mapping a sequence of symbols onto a time-frequency resource. Taking an antenna port as an example, resource mapping means Maps to the REG(k',l') corresponding to the port. In the LTE system, the mapping rule is a pre-time domain and a post-frequency domain. For example, taking the control channel to occupy 3 symbols as an example, the resource mapping may be specifically: the base station will Map to REG(0,0), will Map to REG(0,1), will Map to REG(0,2), will Map to REG(1,0)...
S112:基站对映射至时频资源的信息进行快速傅里叶反变换(inverse fast fourier transform,IFFT)。S112: The base station performs inverse fast fourier transform (IFFT) on the information mapped to the time-frequency resource.
通过IFFT将子载波上的QPSK符号调制成OFDM波形。The QPSK symbols on the subcarriers are modulated into OFDM waveforms by IFFT.
S113:基站向UE发送IFFT后得到的信号,即OFDM时域信号。S113: The signal obtained by the base station after sending the IFFT to the UE, that is, the OFDM time domain signal.
如图2所示,为LTE系统中UE对PDCCH的处理流程的示意图,其中,以UE在第k个子帧(即子帧k)接收PDCCH,以及调制方式是QPSK调制方式为例。该方法可以包括以下步骤S201~S209:As shown in FIG. 2 , it is a schematic diagram of a process flow of a UE to a PDCCH in an LTE system, where the UE receives the PDCCH in the kth subframe (ie, subframe k), and the modulation mode is a QPSK modulation mode. The method may include the following steps S201 to S209:
S201:UE在子帧k监听控制信道。其中,UE监听到的信号(即UE接收到的信号)是以OFDM波形承载的无线信号,即OFDM时域信号。S201: The UE listens to the control channel in the subframe k. The signal monitored by the UE (that is, the signal received by the UE) is a wireless signal carried by the OFDM waveform, that is, an OFDM time domain signal.
S202:UE对监听到的信号,进行快速傅里叶变换(fast fourier transform,FFT)。S202: The UE performs fast Fourier transform (FFT) on the monitored signal.
UE执行FFT之后,可以将OFDM符号变换成QPSK符号,得到符号序列。After the UE performs the FFT, the OFDM symbol can be transformed into a QPSK symbol to obtain a symbol sequence.
S203:UE对FFT后得到的符号序列进行解交织和循环移位。其中,解交织和循环移位的过程与S110对应,可以认为是S110的反过程。S203: The UE deinterleaves and cyclically shifts the symbol sequence obtained after the FFT. The process of deinterleaving and cyclic shifting corresponds to S110, and can be considered as the inverse process of S110.
S204:UE对循环移位后得到的符号序列进行解调。S204: The UE demodulates the symbol sequence obtained after the cyclic shift.
UE执行解调之后,可以将符号序列变为比特序列。解调的过程与S108对应,可以认为是S108的反过程。After the UE performs demodulation, the symbol sequence can be changed to a bit sequence. The process of demodulation corresponds to S108 and can be considered as the inverse of S108.
S205:UE对解调后得到的比特序列进行解扰。S205: The UE performs descrambling on the bit sequence obtained after demodulation.
解扰的过程与S107对应,可以认为是S107的反过程。The process of descrambling corresponds to S107 and can be considered as the inverse of S107.
S206:UE对解扰得到的比特序列,进行盲检。S206: The UE performs blind detection on the bit sequence obtained by the descrambling.
盲检是指UE尝试搜索空间内所有可能的备选PDCCH的位置和聚合级别。本申请对盲检的具体实现方式不进行限定。例如,盲检得到的第m个备选PDCCH可以由以下CCE构成:Blind detection refers to the location and aggregation level of the UE attempting to search all possible alternative PDCCHs in the space. The specific implementation manner of the blind detection is not limited in this application. For example, the mth candidate PDCCH obtained by blind detection may be composed of the following CCEs:
其中,L表示聚合级别,可以为{1,2,4,8}。N
CCE,k表示子帧k内的用于传出控制信道的CCE数。i=0,…,L-1。m=0,...,M
(L)-1。M
(L)表示聚合级别为L时备选PDCCH的数目,LTE规定对UE专用搜索空间,L={1,2,4,8}时,M
(L)分别为{6,6,2,2},而对于公共搜索空间,L={4,8}时,M
(L)分别为{4,2}。
Where L is the aggregation level and can be {1, 2, 4, 8}. N CCE,k represents the number of CCEs used in the subframe k for outgoing control channels. i=0,...,L-1. m=0,...,M (L) -1. M (L) indicates the number of candidate PDCCHs when the aggregation level is L, and LTE specifies a search space dedicated to the UE. When L={1, 2, 4, 8}, M (L) is {6, 6, 2, respectively. 2}, and for public search space, when L={4,8}, M (L) is {4,2}.
对于公共搜索空间,m’=m,Y
k=0。
For the common search space, m'=m, Y k =0.
对于UE专用搜索空间,m'=m+M
(L)·n
CI,Y
k=(A·Y
k-1)modD,Y
-1=n
RNTI≠0,A=39827,D=65537,
其中,n
RNTI表示UE ID,用来标识一个UE。n
CI是载波指示,在单载波的情况下为0。n
s是一个无线帧内slot号。
For the UE-specific search space, m'=m+M (L) ·n CI , Y k =(A·Y k-1 )modD, Y -1 =n RNTI ≠0, A=39827, D=65537, The n RNTI represents a UE ID and is used to identify a UE. n CI is the carrier indication and is 0 in the case of a single carrier. n s is a radio frame slot number.
S207:UE对盲检得到的备选PDCCH进行解速率匹配。S207: The UE performs rate de-matching on the candidate PDCCH obtained by the blind detection.
解速率匹配的过程与S104对应,可以认为是S104的反过程。The process of the rate matching process corresponds to S104, and can be considered as the inverse process of S104.
S208:UE对解速率匹配得到的比特序列,进行信道解码。S208: The UE performs channel decoding on the bit sequence obtained by the de-rate matching.
S209:UE对信道解码得到的比特序列进行CRC校验。S209: The UE performs CRC check on the bit sequence obtained by channel decoding.
UE通过CRC校验确定接收是否正确,即S206中盲检得到的备选PDCCH是否真的是发给该UE的PDCCH。如果不成功,则进行盲检得到下一个备选PDCCH,直到遍历所有备选PDCCH。如果成功,说明S206中盲检得到的备选PDCCH是发送给该UE的PDCCH。The UE determines whether the reception is correct by using the CRC check, that is, whether the candidate PDCCH obtained by blind detection in S206 is really the PDCCH sent to the UE. If unsuccessful, blind detection is performed to obtain the next candidate PDCCH until all candidate PDCCHs are traversed. If successful, the alternative PDCCH obtained by blind detection in S206 is the PDCCH transmitted to the UE.
根据5G NR的讨论,为了保证控制信道的鲁棒性(robustness),可以使用多个波束向一个UE传输PDCCH。UE和基站之间可能同时使用多个波束进行通信。其中,鲁棒性可以理解为稳定性或稳健性等。According to the discussion of the 5G NR, in order to ensure the robustness of the control channel, multiple beams can be used to transmit the PDCCH to one UE. Multiple beams may be used for communication between the UE and the base station simultaneously. Among them, robustness can be understood as stability or robustness and the like.
但是,根据上文描述可知,上文提供的技术方案至少存在以下技术问题:However, according to the above description, the technical solutions provided above have at least the following technical problems:
第一,LTE本身没有考虑与波束相关的信息处理流程。First, LTE itself does not consider the beam-related information processing flow.
第二,在基站使用多个波束向同一个UE发送PDCCH的场景下,如果仍然沿用上述的处理流程,同一个基站的多个波束在向同一个UE发送PDCCH时,会使用类似的随机化方法。具体的说,同一基站的多个波束会在相同的频率位置发送同一个PDCCH,采用相同的交织方法,使用同样的加扰序列和循环移位方式。这会减弱随机化的效果,并且会造成多波束基站对邻区的干扰强度变大。其中,该干扰强度与波束数目成正比。多波束基站是指使用多个波束与同一个UE进行通信的基站。Second, in a scenario where the base station uses multiple beams to transmit PDCCHs to the same UE, if the above processing flow is still used, multiple beams of the same base station use a similar randomization method when transmitting PDCCHs to the same UE. . Specifically, multiple beams of the same base station will transmit the same PDCCH at the same frequency position, using the same interleaving method, using the same scrambling sequence and cyclic shift mode. This will reduce the effect of randomization and will cause the interference strength of the multi-beam base station to the neighboring area to become large. Wherein, the interference intensity is proportional to the number of beams. A multi-beam base station refers to a base station that communicates with the same UE using multiple beams.
第三,在基站使用多个波束向同一个UE发送PDCCH的场景下,如果仍然沿用上述的处理流程,基站同时使用多个波束向同一个UE发送PDCCH时,该多个波束发送的信息是相同的,如果波束之间的相关性不够低,该多个波束会产生自干扰,从而会减低信道容量。Third, in a scenario in which the base station uses multiple beams to transmit a PDCCH to the same UE, if the foregoing process flow is still used, and the base station simultaneously uses multiple beams to transmit the PDCCH to the same UE, the information sent by the multiple beams is the same. If the correlation between the beams is not low enough, the multiple beams will generate self-interference, which will reduce the channel capacity.
第四,在基站使用多个波束向同一个UE发送PDCCH的场景下,如果仍然沿用上述的处理流程,基站依次使用多个波束向同一个UE发送PDCCH时,例如,一个符号使用一个波束进行发送。此时,对于该UE,两个符号对应的频域资源完全相同。这样,只获得了多个波束带来的空域上的多样性,没有充分利用多个波束的条件。Fourth, in a scenario in which the base station uses multiple beams to transmit PDCCHs to the same UE, if the above process is still used, the base station sequentially uses multiple beams to transmit PDCCHs to the same UE, for example, one symbol is transmitted using one beam. . At this time, for the UE, the frequency domain resources corresponding to the two symbols are identical. In this way, only the diversity in the airspace brought by the multiple beams is obtained, and the conditions of the multiple beams are not fully utilized.
基于此,本申请提供了一种信息传输方法和装置。其具体为通过考虑波束对信息处理过程的影响,从而提高了随机化效果,降低了多波束基站对邻区的干扰强度。该过程充分利用了多波束这一条件。并且,可选的,在基站同时使用多个波束向同一个UE发送PDCCH的场景中,可以降低该多个波束之间的自干扰,从而增强信道容量。Based on this, the present application provides an information transmission method and apparatus. Specifically, the effect of the beam on the information processing process is considered, thereby improving the randomization effect and reducing the interference strength of the multi-beam base station to the neighboring area. This process takes full advantage of the multi-beam condition. Moreover, optionally, in a scenario in which a base station simultaneously uses multiple beams to transmit a PDCCH to the same UE, self-interference between the multiple beams may be reduced, thereby enhancing channel capacity.
下面将结合本申请中的附图,对本申请中的技术方案进行详细地描述。The technical solutions in the present application will be described in detail below in conjunction with the drawings in the present application.
本申请提供的技术方案可以应用于图3所示的系统架构中。图3所示的系统架构中包括一个网络设备100,以及与网络设备100连接的一个或多个终端设备200。The technical solution provided by the present application can be applied to the system architecture shown in FIG. 3. The system architecture shown in FIG. 3 includes a network device 100 and one or more terminal devices 200 connected to the network device 100.
其中,网络设备100可以是能和终端设备200通信的设备。网络设备100可以是基站、中继站或接入点等。基站可以是全球移动通信系统(global system for mobile communication,GSM)或码分多址(code division multiple access,CDMA)网络中的基站收发信台(base transceiver station,BTS),也可以是宽带码分多址(wideband code division multiple access,WCDMA)中的NB(NodeB),还可以是LTE中的eNB或eNodeB(evolutional NodeB)。网络设备100还可以是云无线接入网络(cloud radio access network,CRAN)场景下的无线控制器。网络设备100还可以是未来5G网络中的网络设备或未来演进的PLMN网络中的网络设备; 还可以是可穿戴设备或车载设备等。The network device 100 may be a device that can communicate with the terminal device 200. Network device 100 can be a base station, a relay station, or an access point, and the like. The base station may be a base transceiver station (BTS) in a global system for mobile communication (GSM) or a code division multiple access (CDMA) network, or may be a broadband code division. The NB (NodeB) in the wideband code division multiple access (WCDMA) may also be an eNB or an eNodeB (evolutional NodeB) in LTE. The network device 100 may also be a wireless controller in a cloud radio access network (CRAN) scenario. The network device 100 may also be a network device in a future 5G network or a network device in a future evolved PLMN network; it may also be a wearable device or an in-vehicle device or the like.
终端设备200可以是UE、接入终端、UE单元、UE站、移动站、移动台、远方站、远程终端、移动设备、UE终端、终端、无线通信设备、UE代理或UE装置等。接入终端可以是蜂窝电话、无绳电话、SIP(会话启动协议,session initiation protocol)电话、WLL(无线本地环路,wireless local loop)站、个人数字处理(personal digital assistant,PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备,未来5G网络中的终端设备或者未来演进的PLMN网络中的终端设备等。本申请中,称为终端设备或者终端,或者UE。The terminal device 200 may be a UE, an access terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a UE terminal, a terminal, a wireless communication device, a UE proxy, or a UE device. The access terminal may be a cellular phone, a cordless phone, a SIP (session initiation protocol) phone, a WLL (wireless local loop) station, a personal digital assistant (PDA), with wireless communication. Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks, or terminal devices in future evolved PLMN networks, and the like. In this application, it is called a terminal device or a terminal, or a UE.
需要说明的是,本文中均是以网络设备100是基站,终端设备200是UE为例进行说明。对下行传输,发送设备可以为基站,接收设备为终端,对上行传输,发送设备为终端,接收设备为基站。It should be noted that, in this document, the network device 100 is a base station, and the terminal device 200 is a UE as an example. For downlink transmission, the sending device may be a base station, and the receiving device is a terminal. For uplink transmission, the sending device is a terminal, and the receiving device is a base station.
以网络设备100为基站为例,对基站的通用硬件架构进行说明。如图4所示,基站可以包括室内基带处理单元(building baseband unit,BBU)和远端射频模块(remote radio unit,RRU),RRU和天馈系统(即天线)连接,BBU和RRU可以根据需要拆开使用。Taking the network device 100 as a base station as an example, the general hardware architecture of the base station will be described. As shown in FIG. 4, the base station may include an indoor baseband unit (BBU) and a remote radio unit (RRU), and the RRU and the antenna feeder system (ie, an antenna) are connected. The BBU and the RRU may be as needed. Take it apart.
以终端设备200为手机为例,对手机的通用硬件架构进行说明。如图5所示,手机可以包括:射频(radio Frequency,RF)电路110、存储器120、其他输入设备130、显示屏140、传感器150、音频电路160、I/O子系统170、处理器180、以及电源190等部件。本领域技术人员可以理解,图5所示的手机的结构并不构成对手机的限定,可以包括比图示更多或者更少的部件,或者组合某些部件,或者拆分某些部件,或者不同的部件布置。本领域技术人员可以理解显示屏140属于用户界面(user Interface,UI),显示屏140可以包括显示面板141和触摸面板142。且手机可以包括比图示更多或者更少的部件。尽管未示出,手机还可以包括摄像头、蓝牙模块等功能模块或器件,在此不再赘述。Taking the terminal device 200 as a mobile phone as an example, the general hardware architecture of the mobile phone will be described. As shown in FIG. 5, the mobile phone may include: a radio frequency (RF) circuit 110, a memory 120, other input devices 130, a display screen 140, a sensor 150, an audio circuit 160, an I/O subsystem 170, a processor 180, And components such as power supply 190. It will be understood by those skilled in the art that the structure of the mobile phone shown in FIG. 5 does not constitute a limitation on the mobile phone, and may include more or less components than those illustrated, or combine some components, or split some components, or Different parts are arranged. Those skilled in the art can understand that the display screen 140 belongs to a user interface (UI), and the display screen 140 can include a display panel 141 and a touch panel 142. And the handset can include more or fewer components than shown. Although not shown, the mobile phone may also include functional modules or devices such as a camera and a Bluetooth module, and details are not described herein.
进一步地,处理器180分别与RF电路110、存储器120、音频电路160、I/O子系统170、以及电源190均连接。I/O子系统170分别与其他输入设备130、显示屏140、传感器150均连接。其中,RF电路110可用于收发信息或通话过程中,信号的接收和发送,特别地,将基站的下行信息接收后,给处理器180处理。存储器120可用于存储软件程序以及模块。处理器180通过运行存储在存储器120的软件程序以及模块,从而执行手机的各种功能应用以及数据处理。其他输入设备130可用于接收输入的数字或字符信息,以及产生与手机的用户设置以及功能控制有关的键信号输入。显示屏140可用于显示由用户输入的信息或提供给用户的信息以及手机的各种菜单,还可以接受用户输入。传感器150可以为光传感器、运动传感器或者其他传感器。音频电路160可提供用户与手机之间的音频接口。I/O子系统170用来控制输入输出的外部设备,外部设备可以包括其他设备输入控制器、传感器控制器、显示控制器。处理器180是手机200的控制中心,利用各种接口和线路连接整个手机的各个部分,通过运行或执行存储在存储器120内的软件程序和/或模块,以及调用存储在存储器120内的数据,执行手机200的各种功能和处理数据,从而对手机进行整体监控。电源190(比如电池)用于给上述各个部件供电,优选的,电源可以通过电源管理系统与处理器180逻辑相连,从而通过电源管理系统实现管理充电、放电、以及功耗等功能。Further, the processor 180 is connected to the RF circuit 110, the memory 120, the audio circuit 160, the I/O subsystem 170, and the power supply 190, respectively. The I/O subsystem 170 is connected to other input devices 130, display 140, and sensor 150, respectively. The RF circuit 110 can be used for receiving and transmitting signals during and after receiving or transmitting information, and in particular, receiving downlink information of the base station and processing it to the processor 180. The memory 120 can be used to store software programs as well as modules. The processor 180 executes various functional applications and data processing of the mobile phone by running software programs and modules stored in the memory 120. Other input devices 130 can be used to receive input numeric or character information, as well as to generate key signal inputs related to user settings and function controls of the handset. The display screen 140 can be used to display information input by the user or information provided to the user as well as various menus of the mobile phone, and can also accept user input. Sensor 150 can be a light sensor, a motion sensor, or other sensor. The audio circuit 160 can provide an audio interface between the user and the handset. The I/O subsystem 170 is used to control external devices for input and output, and the external devices may include other device input controllers, sensor controllers, and display controllers. The processor 180 is the control center of the handset 200, which connects various portions of the entire handset using various interfaces and lines, by running or executing software programs and/or modules stored in the memory 120, and recalling data stored in the memory 120, The various functions and processing data of the mobile phone 200 are executed to perform overall monitoring of the mobile phone. A power source 190 (such as a battery) is used to power the various components described above. Preferably, the power source can be logically coupled to the processor 180 through a power management system to manage functions such as charging, discharging, and power consumption through the power management system.
需要说明的是,本申请提供的技术方案尤其可以适用于5G NR系统中。根据5G NR的讨论,为了保证控制信道的鲁棒性,可以使用多个波束向一个UE传输PDCCH。本申请提供 的技术方案尤其适用于基于多个波束的场景中。使用多个波束发送一个PDCCH可以有以下两种典型的场景。It should be noted that the technical solution provided by the present application is particularly applicable to a 5G NR system. According to the discussion of the 5G NR, in order to ensure the robustness of the control channel, multiple beams can be used to transmit the PDCCH to one UE. The technical solution provided by the present application is particularly applicable to a scenario based on multiple beams. There are two typical scenarios for transmitting one PDCCH using multiple beams.
场景1:UE和基站之间能够同时使用多个波束进行通信。如图6所示,基站使用1个控制符号(即控制符号0)向UE传输PDCCH,并且,同时使用2个波束(即波束1和波束2)发送该PDCCH。Scenario 1: A plurality of beams can be simultaneously used for communication between a UE and a base station. As shown in FIG. 6, the base station transmits a PDCCH to the UE using one control symbol (ie, control symbol 0), and simultaneously transmits the PDCCH using two beams (ie, beam 1 and beam 2).
场景2:UE在同一时刻与基站使用一个波束进行通信。如图7所示,基站使用2个控制符号(即控制符号0和控制符号1)向UE传输PDCCH,并且,在每个波束上传输1个控制符号,即:在波束1上传输控制符号0,在波束2上传输控制符号2。Scenario 2: The UE communicates with the base station using one beam at the same time. As shown in FIG. 7, the base station transmits PDCCH to the UE by using two control symbols (ie, control symbol 0 and control symbol 1), and transmits one control symbol on each beam, that is, transmits control symbol 0 on beam 1. The control symbol 2 is transmitted on the beam 2.
可以理解的,上述图6和图7仅为示例,其不构成对本申请提供的技术方案所适用的场景的限定。例如,基站可以在3个或3个以上的控制符号上传输PDCCH。It can be understood that the foregoing FIG. 6 and FIG. 7 are only examples, which do not constitute a limitation of the scenario to which the technical solution provided by the present application is applicable. For example, a base station can transmit a PDCCH on three or more control symbols.
为了便于描述,以下以步骤的形式示出并详细描述了本申请实施例中基站和UE执行的信息传输方法。For convenience of description, the information transmission method performed by the base station and the UE in the embodiment of the present application is shown and described in detail below.
如图8所示,为本申请实施例提供的一种信息传输方法的流程示意图。需要说明的是,图8中是以基站对一个波束上传输的PDCCH进行处理为例进行说明的。该方法可以包括如下步骤S301~S312:FIG. 8 is a schematic flowchart diagram of an information transmission method provided by an embodiment of the present application. It should be noted that FIG. 8 is an example in which a base station processes a PDCCH transmitted on one beam as an example. The method may include the following steps S301 to S312:
S301~S306:可以参考S101~S106,也可以采用其他方法,本发明对此不予限定。S301 to S306: S101 to S106 may be referred to, and other methods may be used. The present invention does not limit this.
S307:基站根据波束的标识,对资源复用后得到的比特序列进行加扰。S307: The base station scrambles the bit sequence obtained by multiplexing the resources according to the identifier of the beam.
其中,资源复用后得到的比特序列可以是一种待加扰比特序列。The bit sequence obtained after resource multiplexing may be a bit sequence to be scrambled.
如图9所示,S307可以包括以下步骤T1~T3:As shown in FIG. 9, S307 may include the following steps T1 to T3:
T1:基站根据波束指示信息、小区索引和时隙号,获取加扰序列的初始化因子。T1: The base station acquires an initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number.
示例的,根据公式
确定加扰序列的初始化因子c
init;其中,
表示向下取整,n
s表示时隙号,
表示小区索引,offset表示与波束指示信息相关的一个值。其中,小区索引是指UE所在小区的小区ID,时隙号是指传输PDCCH时所使用的slot的编号。
Example, according to the formula Determining the initialization factor of the scrambling sequence c init ; Indicates rounding down, n s is the slot number, Indicates a cell index, and offset represents a value associated with beam indication information. The cell index refers to the cell ID of the cell where the UE is located, and the slot number refers to the number of the slot used when transmitting the PDCCH.
T2:基站根据加扰序列的初始化因子,确定加扰序列。T2: The base station determines the scrambling sequence according to the initialization factor of the scrambling sequence.
T3:基站根据加扰序列,对待加扰比特序列进行加扰,得到加扰后的比特序列。T3: The base station scrambles the scrambled bit sequence according to the scrambling sequence to obtain a scrambled bit sequence.
本申请实施例对T2~T3的具体实现过程不进行限定。The specific implementation process of T2 to T3 is not limited in the embodiment of the present application.
可以理解的,具体实现时,基站和UE可以预先约定offset与波束指示信息之间的相关关系。其具体示例可以参考下文。It can be understood that, in specific implementation, the base station and the UE may pre-agreed the correlation between the offset and the beam indication information. Specific examples thereof can be referred to below.
可以理解的,由S307可知,本申请提供的加扰操作与波束指示信息相关,每个波束指示信息用于指示一个波束,不同的波束指示信息指示不同的波束。每个波束可以采用一个或多个波束指示信息进行指示,不同的波束可以采用不同的波束指示信息进行指示。本申请对波束指示信息的具体实现方式不进行限定,下面列举几种可选的方式:It can be understood that, as shown in S307, the scrambling operation provided by the present application is related to beam indication information, each beam indication information is used to indicate one beam, and different beam indication information indicates different beams. Each beam can be indicated by one or more beam indication information, and different beams can be indicated by different beam indication information. The specific implementation manner of the beam indication information is not limited in this application. Several alternative methods are listed below:
方式1:波束指示信息是波束的相对编号。Mode 1: The beam indication information is the relative number of the beams.
假设基站向UE发送PDCCH所使用的波束的相对编号是beam
idx={0,1,...},其中,每个编号表示一个物理波束,如图9a所示,那么,offset与波束的相对编号的一种可能的相关方式为:offset=beam
idx。例如,如图9a所示,基站共使用2个波束向UE发送PDCCH,这2个波束的相对编号分别可以为0和1,则可以使用offset=0 获取波束0对应的加扰序列,使用offset=1获取波束1对应的加扰序列。
It is assumed that the relative number of beams used by the base station to transmit the PDCCH to the UE is beam idx = {0, 1, ...}, where each number represents a physical beam, as shown in FIG. 9a, then the offset is opposite to the beam. One possible way to correlate numbers is: offset=beam idx . For example, as shown in FIG. 9a, the base station uses two beams to transmit a PDCCH to the UE. The relative numbers of the two beams may be 0 and 1, respectively, and the offset sequence corresponding to the beam 0 may be obtained by using offset=0, and the offset is used. =1 Acquire the scrambling sequence corresponding to beam 1.
方式2:波束指示信息是波束的逻辑编号。Mode 2: The beam indication information is the logical number of the beam.
假设基站的发送波束的逻辑编号是beam
idx={0,1,...},其中,每个编号表示一个物理波束,如图9b所示,那么,offset与波束的逻辑编号的一种可能的相关方式为:offset=beam
idx。例如,如图9b所示,基站的发送波束的编号分别为0,1,2,3,若基站使用波束1和波束2向UE发送PDCCH,则可以使用offset=1获取波束1对应的加扰序列,使用offset=2获取波束2对应的加扰序列指示波束2。
Suppose the logical number of the transmit beam of the base station is beam idx = {0, 1, ...}, where each number represents a physical beam, as shown in Figure 9b, then one possibility of the offset and the logical number of the beam The relevant way is: offset=beam idx . For example, as shown in FIG. 9b, the number of the transmit beams of the base station is 0, 1, 2, and 3 respectively. If the base station uses the beam 1 and the beam 2 to transmit the PDCCH to the UE, the offset 1 corresponding to the beam 1 can be acquired using offset=1. Sequence, using offset=2 to obtain the scrambling sequence indicator beam 2 corresponding to beam 2.
方式3:波束指示信息是波束的物理编号。Mode 3: The beam indication information is the physical number of the beam.
假设基站的发送波束的物理编号是beam
idx={0,1,...},其中,每个编号表示一个物理波束,那么,offset与波束的物理编号的一种可能的相关方式为:offset=beam
idxmod N。其中,N是一个预定义或者可配置的整数。假设基站共使用8个波束服务整个小区,如图9c所示。基于图9c,若N=2,基站使用波束5和波束6向UE发送PDCCH,则可以使用offset=1获取波束5对应的加扰序列,使用offset=0获取波束6对应的加扰序列。
Assuming that the physical number of the transmit beam of the base station is beam idx = {0, 1, ...}, where each number represents a physical beam, then one possible correlation between the offset and the physical number of the beam is: offset =beam idx mod N. Where N is a predefined or configurable integer. It is assumed that the base station uses a total of 8 beams to serve the entire cell, as shown in Figure 9c. Based on FIG. 9c, if N=2, the base station transmits the PDCCH to the UE using the beam 5 and the beam 6, the offset sequence corresponding to the beam 5 can be acquired using offset=1, and the scrambling sequence corresponding to the beam 6 can be acquired using offset=0.
方式4:波束指示信息是端口号。Mode 4: The beam indication information is a port number.
一个波束可以对应一个或多个端口号。因此,可以使用一个波束对应的端口号来指示该波束。可选的,可以将一个波束对应的端口号构成一个端口组,并为每个端口组分配一个逻辑编号(port group ID)。基于此,假设beam
idx={0,1,...},其中,每个编号表示一个端口组,那么,offset与端口号的一种可能的相关方式为:offset=beam
idxmod N。其中,N是一个预定义或者可配置的整数。例如,若N=2,基站使用波束2和波束3向UE发送PDCCH,则可以使用offset=0获取波束2对应的加扰序列,使用offset=1获取波束3对应的加扰序列。
One beam can correspond to one or more port numbers. Therefore, the beam number corresponding to one beam can be used to indicate the beam. Optionally, the port number corresponding to one beam can be formed into a port group, and each port group is assigned a port group ID. Based on this, assuming that beam idx = {0, 1, ...}, where each number represents a port group, then one possible correlation between offset and port number is: offset=beam idx mod N. Where N is a predefined or configurable integer. For example, if N=2, the base station transmits the PDCCH to the UE using the beam 2 and the beam 3, then the scrambling sequence corresponding to the beam 2 can be acquired using offset=0, and the scrambling sequence corresponding to the beam 3 can be acquired using offset=1.
方式5:波束指示信息是准共址(quasi co located,QCL)信息。Mode 5: The beam indication information is quasi colocation (QCL) information.
准共址,用于表示多个资源之间具有一个或多个相同或者相类似的通信特征,对于具有同位关系的多个资源,可以采用相同或者类似的通信配置。例如,如果两个天线端口具有同位关系,那么一个端口传送一个符号的信道大尺度特性可以从另一个端口传送一个符号的信道大尺度特性推断出来。其中,大尺度特性可以包括:延迟扩展,平均延迟,多普勒扩展,多普勒频移,平均增益,终端设备接收波束编号,发射/接收信道相关性,接收到达角,接收机天线的空间相关性等。Quasi-co-location, used to indicate that one or more identical or similar communication features exist between multiple resources. For multiple resources with a parity relationship, the same or similar communication configuration may be adopted. For example, if two antenna ports have a parity relationship, the large-scale characteristics of the channel in which one port transmits one symbol can be inferred from the large-scale characteristics of the channel through which one symbol transmits one symbol. Among them, large-scale characteristics may include: delay spread, average delay, Doppler spread, Doppler shift, average gain, terminal equipment receive beam number, transmit/receive channel correlation, receive angle of arrival, receiver antenna space Relevance and so on.
基于此,可以使用在发送PDCCH的波束上发送的其他信号的资源来指示该波束。可选的,该信号可以是参考信号,例如CSI-RS。其中,这里的“资源”可以包括但不限于以下信息中的至少一种:时频资源、端口数目、周期、偏移等。Based on this, the resources of other signals transmitted on the beam transmitting the PDCCH can be used to indicate the beam. Alternatively, the signal may be a reference signal, such as a CSI-RS. The “resources” herein may include, but are not limited to, at least one of the following information: time-frequency resources, number of ports, periods, offsets, and the like.
可以理解的,如果基站使用某个波束向UE发送PDCCH,那么,基站使用这个波束发送过CSI-RS。这是因为,一般基站需要先向UE发送CSI-RS,来进行信道测量;然后,再利用信道测量结果向UE发送PDCCH。基于此可知,基站只要向UE通知了CSI-RS使用的端口号和/或资源号,UE即可获知基站使用哪个或哪些波束发送PDCCH。It can be understood that if the base station sends a PDCCH to the UE using a certain beam, the base station transmits the CSI-RS using this beam. This is because the general base station needs to first send a CSI-RS to the UE to perform channel measurement; then, the channel measurement result is used to send the PDCCH to the UE. Based on this, the base station can know which beam or beams to use to transmit the PDCCH by the base station, as long as the base station notifies the UE of the port number and/or the resource number used by the CSI-RS.
如图9d所示,是CSI-RS资源与波束之间的一种对应关系。As shown in FIG. 9d, it is a correspondence between CSI-RS resources and beams.
可选的,CSI-RS资源号可以是resource ID,或者,resource ID+port ID(端口ID)。该情况下,假设beam
idx={0,1,...},其中,每个编号表示一个CSI-RS资源,那么,offset与CSI-RS资源的一种可能的相关方式为:offset=beam
idxmod N,其中,N是一个 预定义或者可配置的整数。
Optionally, the CSI-RS resource number may be a resource ID, or a resource ID+port ID. In this case, assuming that beam idx = {0, 1, ...}, where each number represents a CSI-RS resource, then one possible correlation between offset and CSI-RS resources is: offset=beam Idx mod N, where N is a predefined or configurable integer.
例如,如图9d所示,若基站向UE发送CSI-RS时所使用的CSI-RS资源号为#0和#1,并且,使用发送CSI-RS的波束向该UE发送PDCCH,且N=2,则可以使用offset=0获取CSI-RS资源编号为#0对应的波束的加扰序列,使用offset=1获取CSI-RS资源编号为#1对应的波束的加扰序列。For example, as shown in FIG. 9d, if the CSI-RS resource numbers used by the base station to transmit the CSI-RS to the UE are #0 and #1, and the PDCCH is transmitted to the UE using the beam transmitting the CSI-RS, and N= 2, the offset sequence of the beam corresponding to the CSI-RS resource number # 0 can be obtained by using offset=0, and the scrambling sequence of the beam corresponding to the CSI-RS resource number # 1 can be obtained by using offset=1.
方式6:波束指示信息是波束对连接(beam pair link,BPL)信息。Mode 6: The beam indication information is beam pair link (BPL) information.
BPL信息可以是BPL编号等。假设beam
idx={0,1,...},其中,每个编号表示一个BPL,如图9e所示。那么,offset与BPL信息的一种可能的相关方式为offset=beam
idx。例如,如图9e所示,基站使用波束对0和波束对1向UE发送PDCCH,那么,可以使用offset=0获取波束0对应的加扰序列,使用offset=1获取波束1对应的加扰序列。
The BPL information may be a BPL number or the like. Suppose beam idx = {0, 1, ...}, where each number represents a BPL, as shown in Figure 9e. Then, one possible correlation between offset and BPL information is offset=beam idx . For example, as shown in FIG. 9e, the base station uses the beam pair 0 and the beam pair 1 to transmit the PDCCH to the UE. Then, offset=0 can be used to acquire the scrambling sequence corresponding to beam 0, and offset=1 is used to obtain the scrambling sequence corresponding to beam 1. .
方式7:波束指示信息是UE组。其中,一个波束覆盖范围内的UE构成一个UE组,每个UE组可以包括一个或多个UE,一个UE可以属于一个或多个UE组。Mode 7: The beam indication information is a UE group. The UEs in one beam coverage form one UE group, each UE group may include one or multiple UEs, and one UE may belong to one or multiple UE groups.
如图9f所示,波束1对应的UE组1中包括UE1,波束2对应的UE组2中包括UE1和UE2,波束3对应的UE组3包括UE2。该情况下,假设beam
idx={0,1,...},其中,每个编号指一个UE组,那么,offset与UE组的一种可能的相关方式为:offset=beam
idx。例如,如图9f所示,基站可以使用offset=1获取波束1对应的加扰序列,使用offset=2获取波束2对应的加扰序列,使用offset=3获取波束3对应的加扰序列。
As shown in FIG. 9f, the UE group 1 corresponding to the beam 1 includes the UE1, the UE group 2 corresponding to the beam 2 includes the UE1 and the UE2, and the UE group 3 corresponding to the beam 3 includes the UE2. In this case, assuming that beam idx = {0, 1, ...}, where each number refers to one UE group, then one possible correlation between offset and UE group is: offset=beam idx . For example, as shown in FIG. 9f, the base station may acquire the scrambling sequence corresponding to beam 1 using offset=1, acquire the scrambling sequence corresponding to beam 2 using offset=2, and acquire the scrambling sequence corresponding to beam 3 using offset=3.
方式8:波束指示信息是时域符号。Mode 8: The beam indication information is a time domain symbol.
该时域符号是指发送该波束时占用的OFDM符号。该方式适用于基站使用多个波束在不同的符号上向同一个UE发送PDCCH,且在每个符号只使用一个波束向UE传输PDCCH的场景中。如图9g所示,基站在符号0使用一个波束向UE发送PDCCH,并在符号1使用另一个波束向该UE发送PDCCH。The time domain symbol refers to an OFDM symbol occupied when the beam is transmitted. This method is applicable to a scenario in which a base station transmits a PDCCH to a same UE on different symbols using multiple beams, and transmits a PDCCH to the UE using only one beam per symbol. As shown in FIG. 9g, the base station transmits a PDCCH to the UE using one beam at symbol 0, and transmits a PDCCH to the UE using another beam at symbol 1.
假设beam
idx={0,1,...},其中,每个编号指一个符号时间。那么,offset与时域符号的一种可能的相关方式为:
其中,N是一个预定义或者可配置的整数,例如N=9。
Suppose beam idx = {0, 1, ...}, where each number refers to a symbol time. Then, one possible way to associate offset with time domain symbols is: Where N is a predefined or configurable integer, such as N=9.
可以理解的,上文列举的几种方式大部分是以波束指示信息是单一信息为例进行说明的,具体实现时,波束指示信息也可以是上述至少两个信息的组合,例如上述方式5中的一个示例。当然不限于上述几种信息。本申请不再一一列举。It is to be understood that the above-mentioned methods are mostly described by taking the beam indication information as a single information as an example. In specific implementation, the beam indication information may also be a combination of the at least two pieces of information, for example, in the foregoing manner 5 An example of this. Of course, it is not limited to the above information. This application is not listed one by one.
需要说明的是,本申请提供的技术方案中,基站执行加扰操作时考虑了波束,但是,本申请中并不限定不同波束对应的加扰序列一定不同。也就是说,不同波束对应的加扰序列可以相同,也可以不相同。It should be noted that, in the technical solution provided by the present application, the base station considers the beam when performing the scrambling operation, but the scrambling sequence corresponding to different beams is not limited in the present application. That is to say, the scrambling sequences corresponding to different beams may be the same or different.
可以理解的,基站与同一个UE之间通信的波束可以随着UE的移动而改变,本申请对所使用的波束的改变规则不进行限定。该情况下,因此,波束指示信息不是一个固定值。基于此,基站可以通过信令通知UE该波束指示信息。本申请实施例对该步骤的与图8中的各步骤的执行顺序不进行限定,可选的,该步骤可以在S301之前执行。需要说明的是,用于发送波束指示信息的信令可以是新设计的一个信令,也可以复用现有技术中的一个信令。It can be understood that the beam of communication between the base station and the same UE may change with the movement of the UE. The present application does not limit the change rule of the used beam. In this case, therefore, the beam indication information is not a fixed value. Based on this, the base station can notify the UE of the beam indication information by signaling. The order of execution of the steps in FIG. 8 is not limited in the embodiment of the present application. Alternatively, the step may be performed before S301. It should be noted that the signaling used to send the beam indication information may be a newly designed signaling, or may reuse one signaling in the prior art.
可选的,基站可以通过无线资源控制(radio resource control,RRC)信令、媒体接入控制(medium access control,MAC)信令或DCI向UE发送波束指示信息。示例的,基站通过 RRC信令或MAC信令向UE发送波束指示信息,可以适用于波束改变较慢的场景。基站通过DCI向UE发送波束指示信息,可以适用于波束改变较快的场景中。Optionally, the base station may send the beam indication information to the UE by using radio resource control (RRC) signaling, medium access control (MAC) signaling, or DCI. For example, the base station sends the beam indication information to the UE through RRC signaling or MAC signaling, which can be applied to a scenario where the beam change is slow. The base station sends the beam indication information to the UE through the DCI, which can be applied to a scenario in which the beam change is fast.
S308~S310:可以参考现有技术中S108~S110的方法,也可以采用其他方法,本发明对此不限定。S308 to S310: Reference may be made to the methods of S108 to S110 in the prior art, and other methods may be used. The present invention is not limited thereto.
S311:基站按照先频域后时域的映射规则,对循环移位后得到的符号序列进行资源映射。S311: The base station performs resource mapping on the symbol sequence obtained after the cyclic shift according to the mapping rule of the time domain after the frequency domain.
本申请实施例提供的技术方案尤其适用于基于多个波束传输的场景中,在多个波束传输的场景中,映射规则可以是先频域后时域,这样,能够避免在一个波束占用了一个符号的场景中,因按照先时域后频域的映射规则,而导致的该波束方向上的UE无法收全不同波束上传输的信息的问题。可以理解的,如果一个波束占用了多个符号,则使用该波束传输的信息可以按照先时域后频域的映射规则进行映射,也可以按照先频域后时域的映射规则进行映射。The technical solution provided by the embodiment of the present application is particularly applicable to a scenario based on multiple beam transmissions. In a scenario where multiple beams are transmitted, the mapping rule may be a pre-frequency domain post-time domain, thus avoiding occupying one beam in one beam. In a symbolic scenario, the UE in the beam direction cannot receive information transmitted on different beams due to the mapping rules in the frequency domain after the first time domain. It can be understood that if a beam occupies multiple symbols, the information transmitted by using the beam may be mapped according to the mapping rule of the time domain after the frequency domain, or may be mapped according to the mapping rule of the time domain after the frequency domain.
以一个天线端口为例,资源映射指将
映射到该端口对应的REG(k’,l’)上。其中,关于
的描述可以参考上文S111。
Taking an antenna port as an example, resource mapping refers to Maps to the REG(k',l') corresponding to the port. Among them, about For a description, refer to S111 above.
如果多个波束占用一个符号,如图6所示,那么,基站将这两个波束对应的符号序列进行资源映射均可以为:将将
映射至REG(0,0),将
映射至REG(1,0),将
映射至REG(2,0),将
映射至REG(3,0)……。
If multiple beams occupy one symbol, as shown in FIG. 6, the base station may perform resource mapping on the symbol sequences corresponding to the two beams: Map to REG(0,0), will Map to REG(1,0), will Map to REG(2,0), will Map to REG(3,0)....
如果多个波束占用多个符号,如图7所示,那么,基站在符号0上,将
映射至REG(0,0),将
映射至REG(1,0),将
映射至REG(2,0),将
映射至REG(3,0)……。在符号1上,将
映射至REG(0,1),将
映射至REG(1,1),将
映射至REG(2,1),将
映射至REG(3,1)……。
If multiple beams occupy multiple symbols, as shown in Figure 7, then the base station will be at symbol 0. Map to REG(0,0), will Map to REG(1,0), will Map to REG(2,0), will Map to REG(3,0).... On symbol 1, will Map to REG(0,1), will Map to REG(1,1), will Map to REG(2,1), will Map to REG(3,1)....
S312:可以参考步骤S112,也可以采用其他方法,本发明对此不予限定。S312: Step S112 may be referred to, and other methods may be used, which are not limited by the present invention.
S313:基站通过波束指示信息所指示的波束,向UE发送OFDM时域信号。S313: The base station sends an OFDM time domain signal to the UE by using a beam indicated by the beam indication information.
需要说明的是,上述S301~S313中的部分步骤可以是可选的步骤,另外,本申请实施例对S301~S313中任意两个步骤的执行顺序不进行限定。It should be noted that some of the steps S301 to S313 may be optional steps. In addition, the order of execution of any two steps in S301 to S313 is not limited in the embodiment of the present application.
上述S301~S313是基站在一个波束上发送的PDCCH的处理过程为例进行说明的,在多波束场景中,基站多次执行上述过程即可。The above S301 to S313 are examples of the processing procedure of the PDCCH transmitted by the base station on one beam. In the multi-beam scenario, the base station may perform the above process multiple times.
本实施例中,基站在执行加扰操作的过程中考虑了波束,这样,不同波束上传输的PDCCH可以使用不同的加扰序列进行加扰,使得不同的波束可以使用不同的随机化技术,从而可以提高随机化的效果,并且,能够降低多波束基站对邻区造成的干扰。In this embodiment, the base station considers the beam in the process of performing the scrambling operation, so that the PDCCHs transmitted on different beams can be scrambled using different scrambling sequences, so that different beams can use different randomization techniques, thereby The effect of randomization can be improved, and the interference caused by the multi-beam base station to the neighboring area can be reduced.
如图10所示,为本申请实施例提供的一种信息传输方法的流程示意图。需要说明的是,图10中是以UE对一个波束上传输的PDCCH进行处理为例进行说明的。该方法可以包括如下步骤S401~S409:FIG. 10 is a schematic flowchart diagram of an information transmission method provided by an embodiment of the present application. It should be noted that FIG. 10 is an example in which the UE processes the PDCCH transmitted on one beam as an example. The method may include the following steps S401 to S409:
S401:UE在子帧k监听通过波束发送的PDCCH。UE监听到的信号(即UE接收到的信号)是以OFDM波形承载的无线信号,即OFDM时域信号。S401: The UE monitors the PDCCH transmitted by the beam in the subframe k. The signal monitored by the UE (ie, the signal received by the UE) is a wireless signal carried by the OFDM waveform, that is, an OFDM time domain signal.
S402~S404:可以参考步骤S202~S204,也可以采用其他方法,本发明对此不予限定。S402-S404: Steps S202-S204 may be referred to, and other methods may be used. The present invention does not limit this.
S405:UE根据波束指示信息,对解调后得到的比特序列进行解扰;其中,该波束指示信息用于指示S401中的波束。S405: The UE performs descrambling on the demodulated bit sequence according to the beam indication information, where the beam indication information is used to indicate the beam in S401.
如图11所示,S405可以包括以下步骤M1~M3:As shown in FIG. 11, S405 may include the following steps M1 to M3:
M1:UE根据波束指示信息、小区索引和时隙号,获取加扰序列的初始化因子。M1: The UE acquires an initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number.
M2:UE根据加扰序列的初始化因子,确定加扰序列。M2: The UE determines the scrambling sequence according to the initialization factor of the scrambling sequence.
M3:UE根据加扰序列,对加扰后的比特序列进行解扰。M3: The UE descrambles the scrambled bit sequence according to the scrambling sequence.
其中,M1~M3与图9中的T1~T3对应,其具体实现过程可以参考上文,此处不再赘述。另外,波束指示信息的相关描述也可以参考上文。The M1 to the M3 are corresponding to the T1 to T3 in FIG. 9 , and the specific implementation process may refer to the foregoing, and details are not described herein again. In addition, the related description of the beam indication information can also refer to the above.
另外,该方法还可以包括:UE通过RRC信令、MAC信令或DCI接收波束指示信息。其中,UE具体通过哪种信令接收波束指示信息与基站使用哪种信令发送波束指示信息有关。例如,若基站使用RRC信令发送波束指示信息,则UE使用RRC信令接收波束指示信息。其他的示例不再一一列举。In addition, the method may further include: the UE receiving the beam indication information by using RRC signaling, MAC signaling, or DCI. The UE specifically uses which signaling receiving beam indication information is related to which signaling the base station uses to transmit beam indication information. For example, if the base station transmits beam indication information using RRC signaling, the UE receives beam indication information using RRC signaling. Other examples are not listed one by one.
S406~S409:可以参考S206~S209,也可以采用其他方法,本发明对此不予限定。S406 to S409: Reference may be made to S206 to S209, and other methods may be used. The present invention is not limited thereto.
需要说明的是,上述S401~S409中的部分步骤可以是可选的步骤,另外,本申请实施例对S401~S409中任意两个步骤的执行顺序不进行限定。It should be noted that some of the steps S401 to S409 may be optional steps. In addition, the order of execution of any two steps in S401 to S409 is not limited in the embodiment of the present application.
可以理解的,如果多个波束占用了一个符号,如图6所示,那么,每个波束对应的PDCCH的处理流程可以均为上述S401~S409。It can be understood that if a plurality of beams occupy one symbol, as shown in FIG. 6, the processing flow of the PDCCH corresponding to each beam may be all the above S401 to S409.
如果多个波束占用了多个符号,如图7所示,那么,若UE在第一个波束所占的符号上监测得到的PDCCH解码正确,则可以不对后续波束所占的符号进行监测。若第一个波束所占的符号上监测得到的PDCCH解码不正确,在再执行一次S401~S409,其中,在S401中,在第二个符号上监测PDCCH;以此类推,直至某一次监测得到的PDCCH解码正确,或者监测完所有PDCCH且均解码不正确为止。If multiple beams occupy multiple symbols, as shown in FIG. 7, if the PDCCH decoded by the UE on the symbol occupied by the first beam is correctly decoded, the symbols occupied by the subsequent beams may not be monitored. If the PDCCH decoded on the symbol occupied by the first beam is incorrectly decoded, S401 to S409 are performed again, wherein in S401, the PDCCH is monitored on the second symbol; and so on, until a certain monitoring is obtained. The PDCCH is decoded correctly, or all PDCCHs are monitored and both are decoded incorrectly.
本实施例中,UE在执行解扰操作的过程中考虑了波束,该解扰的过程与图8所示的实施例中的加扰的过程是对应的,因此,其相关内容的解释以及所能达到的有益效果可以参考图8所示的实施例中对应的部分,此处不再赘述。In this embodiment, the UE considers the beam in the process of performing the descrambling operation, and the process of the descrambling corresponds to the scrambling process in the embodiment shown in FIG. 8. Therefore, the explanation and related content of the related content are For the beneficial effects that can be achieved, reference may be made to the corresponding parts in the embodiment shown in FIG. 8, and details are not described herein again.
可以理解的,上文中均是以“传输PDCCH的过程中,执行加扰操作或解扰时考虑了波束”为例进行说明的,实际实现时,本申请实施例对此不进行限定,例如,本申请实施例提供的技术方案还可以适用于传输以下任一种信道的场景中:It is to be understood that, in the foregoing, the embodiment of the present application is not limited to the embodiment of the present application, for example, in the process of transmitting a PDCCH, in which a scrambling operation is performed or a method of performing descrambling is considered. The technical solution provided by the embodiment of the present application may also be applicable to a scenario for transmitting any of the following channels:
1)物理下行共享信道(physical downlink shared channel,PDSCH)。1) Physical downlink shared channel (PDSCH).
该情况下,加扰序列的初始化因子
其中,n
RNTI表示UE ID,用来标识一个UE,q表示q个码字(codeword)
In this case, the initialization factor of the scrambling sequence Where n RNTI represents the UE ID, which is used to identify a UE, and q represents q codewords.
2)物理多播信道(physical multicast channel,PMCH)。2) Physical multicast channel (PMCH).
该情况下,加扰序列的初始化因子
其中,
表示多播广播单频网(multicast broadcast single frequency network,MBSFN)区域标识。
In this case, the initialization factor of the scrambling sequence among them, Indicates a multicast broadcast single frequency network (MBSFN) area identifier.
3)PBCH。3) PBCH.
4)PCFICH。4) PCFICH.
5)增强物理下行控制信道(enhanced physical downlink control channel,EPDCCH)。5) Enhanced physical downlink control channel (EPDCCH).
该情况下,加扰序列的初始化因子
m表示EPDCCH集合(或EPDCCH簇)的数目,
表示和EPDCCH设置关联的一个高层配置ID。
In this case, the initialization factor of the scrambling sequence m represents the number of EPDCCH sets (or EPDCCH clusters), Represents a high-level configuration ID associated with the EPDCCH setting.
6)物理上行共享信道(physical uplink shared channel,PUSCH)。6) Physical uplink shared channel (PUSCH).
7)物理上行控制信道(physical uplink control channel,PUCCH)。7) Physical uplink control channel (PUCCH).
可以理解的,上述扩展的几种信道的传输方法,以及加扰操作等,可以根据现有技术以及本文提供的传输PDCCH的方法确定,此处不再描述。It is to be understood that the method for transmitting the above-mentioned extended channels, and the scrambling operation and the like may be determined according to the prior art and the method for transmitting the PDCCH provided herein, and are not described herein.
如图12所示,为本申请实施例提供的一种信息传输方法的流程示意图。需要说明的是,图12中是以基站对一个波束上传输的PDCCH进行处理为例进行说明的。该方法可以包括如下步骤S501~S512:FIG. 12 is a schematic flowchart diagram of an information transmission method provided by an embodiment of the present application. It should be noted that FIG. 12 is an example in which a base station processes a PDCCH transmitted on one beam as an example. The method may include the following steps S501 to S512:
S501~S509:可以参考S101~S109,也可以采用其他方法,本发明对此不予限定。S501 to S509: S101 to S109 may be referred to, and other methods may be used. The present invention does not limit this.
S510:基站根据波束指示信息,对预编码后得到的符号序列进行交织和循环移位。S510: The base station performs interleaving and cyclic shifting on the pre-coded symbol sequence according to the beam indication information.
具体的,基站对预编码后得到的符号序列进行交织,然后,根据波束指示信息对交织后得到的符号序列进行循环移位。其中,基站执行交织的步骤是可选的步骤。Specifically, the base station interleaves the symbol sequence obtained after precoding, and then cyclically shifts the symbol sequence obtained after the interleaving according to the beam indication information. The step of performing interleaving by the base station is an optional step.
如图13所示,基站根据波束指示信息进行循环移位,可以包括以下步骤N1:As shown in FIG. 13, the base station performs cyclic shift according to the beam indication information, and may include the following step N1:
N1:基站根据波束指示信息和小区索引,对第一符号组进行循环移位操作,得到第二符号组。N1: The base station performs a cyclic shift operation on the first symbol group according to the beam indication information and the cell index, to obtain a second symbol group.
示例的,基站根据公式
得到第二符号组;其中,
表示第二符号组中的第i个元素,w(i)表示第一符号组中的第i个元素,
表示小区索引,offset表示波束指示信息。
Example, base station according to formula Obtaining a second symbol group; wherein Representing the i-th element in the second symbol group, w(i) representing the i-th element in the first symbol group, Indicates a cell index, and offset indicates beam indication information.
可以理解的,若基站不执行交织的步骤,则第一符号组为预编码后输出的符号序列。若基站执行交织的步骤,则第一符号组为交织后输出的符号序列。第一符号组中包括的调制符号的类型和个数均与调制方式相关。It can be understood that if the base station does not perform the step of interleaving, the first symbol group is a sequence of symbols output after precoding. If the base station performs the step of interleaving, the first symbol group is a sequence of symbols output after interleaving. The type and number of modulation symbols included in the first symbol group are related to the modulation scheme.
示例的,若基站以四联组为单位执行循环移位操作,则以一个天线端口为例,一个四联组z(i)=<y(4i),y(4i+1),y(4i+2),y(4i+3)>。四联组序列可以表示为z(0),z(1),z(2),z(3)……。假设将基站对四联组序列进行交织操作后,该四联组序列中的元素z(i)得到的信息标记为w(i),那么,第一符号组中的元素可以是w(i),第一符号组可以是:w(0),w(1),w(2),w(3)……。第二符号组中的元素可以是
可选的,基站根据公式
其中,M
quad表示四联组的数目。
For example, if the base station performs a cyclic shift operation in units of quadruplets, taking one antenna port as an example, a quadruple group z(i)=<y(4i), y(4i+1), y(4i +2), y(4i+3)>. The quadruple sequence can be expressed as z(0), z(1), z(2), z(3).... Assuming that the base station interleaves the quadruplet sequence, the information obtained by the element z(i) in the quadruplet sequence is marked as w(i), then the element in the first symbol group may be w(i) The first symbol group may be: w(0), w(1), w(2), w(3).... The elements in the second symbol group can be Optional, base station according to the formula Where M quad represents the number of quadruplets.
可以理解的,该示例是以第一符号组中的元素是四联组为例进行说明的,本申请不限于此,例如,可以是N联组,其中,N是大于等于1的任意整数。It can be understood that the example is described by taking the element in the first symbol group as a quadruple group as an example. The present application is not limited thereto, and may be, for example, an N-group, where N is an arbitrary integer greater than or equal to 1.
可以理解的,关于波束指示信息的具体实现,以及基站向UE发送波束指示信息的具体实现方式等,均可以参考上文,此处不再赘述。It can be understood that the specific implementation of the beam indication information, and the specific implementation manner of the base station transmitting the beam indication information to the UE, etc., may be referred to above, and details are not described herein again.
需要说明的是,本申请提供的技术方案中,基站执行循环移位操作时考虑了波束,但是,本申请中病不限定不同波束对应的循环移位后得到的符号序列一定不同。也就是说,不同波 束对应的循环移位后得到的符号序列可以相同,也可以不同。It should be noted that, in the technical solution provided by the present application, the base station considers the beam when performing the cyclic shift operation, but the symbol sequence obtained after the cyclic shift of the different beams is not limited in the present application. That is to say, the sequence of symbols obtained after cyclic shift corresponding to different beams may be the same or different.
S511:基站按照先频域后时域的映射规则,对循环移位后得到的符号序列进行资源映射。其中,该步骤的具体实现过程可以参考S311,此处不再赘述。S511: The base station performs resource mapping on the symbol sequence obtained after the cyclic shift according to the mapping rule of the time domain after the frequency domain. For the specific implementation process of this step, refer to S311, and details are not described herein again.
S512:可以参考S112,也可以采用其他方法,本发明对此不予限定。S512: Reference may be made to S112, and other methods may be used, which are not limited by the present invention.
S513:基站通过波束指示信息所指示的波束,向UE发送映射至时频资源上的信息。S513: The base station sends the information mapped to the time-frequency resource to the UE by using the beam indicated by the beam indication information.
需要说明的是,上述S501~S513中的部分步骤可以是可选的步骤,另外,本申请实施例对S501~S513中任意两个步骤的执行顺序不进行限定。It should be noted that some of the steps S501 to S513 may be optional steps. In addition, the execution sequence of any two of S501 to S513 is not limited in the embodiment of the present application.
可以理解的,如果PDCCH只占用了一个符号,如图6所示,那么,对于两个波束来说,基站对每个波束对应的PDCCH的处理流程可以是:均独立执行S501~S511。其中,执行S511之后,两个波束对应的PDCCH均被映射至同一个符号对应的时频资源上。然后,执行S512,即:将映射至该符号对应的时频资源上的信息进行IFFT。最后,执行S513,即:将在该符号上,通过这两个波束,向UE发送OFDM时域信号。It can be understood that if the PDCCH occupies only one symbol, as shown in FIG. 6, the processing flow of the PDCCH corresponding to each beam by the base station may be: S501 to S511 are performed independently for the two beams. After performing S511, the PDCCHs corresponding to the two beams are all mapped to time-frequency resources corresponding to the same symbol. Then, S512 is executed, that is, the information mapped to the time-frequency resource corresponding to the symbol is subjected to IFFT. Finally, S513 is performed, that is, an OFDM time domain signal is transmitted to the UE through the two beams on the symbol.
如果PDCCH占用了两个符号,如图7所示,那么,对于两个波束来说,基站对每个波束对应的PDCCH的处理流程可以是:独立执行S501~S315。If the PDCCH occupies two symbols, as shown in FIG. 7, the processing flow of the PDCCH corresponding to each beam by the base station may be: S501 to S315 are performed independently for the two beams.
对于PDCCH占用了三个或三个以上符号的场景来说,基站对每个波束对应的PDCCH的处理流程可以参考PDCCH占用了两个符号的场景下基站对每个波束对应的PDCCH的处理流程,此处不再赘述。For a scenario in which the PDCCH occupies three or more symbols, the processing procedure of the PDCCH corresponding to each beam by the base station may refer to a processing procedure of the PDCCH corresponding to each beam by the base station in the scenario where the PDCCH occupies two symbols. I will not repeat them here.
本实施例中,基站在执行循环移位操作的过程中考虑了波束,这样,不同波束上传输的PDCCH经循环移位后得到的符号序列可以不同,使得不同波束上传输的PDCCH可以使用不同的随机化技术,从而可以提高随机化的效果,并且,能够降低多波束基站对邻区造成的干扰。可选的,由于该技术方案可以实现任意多个波束对应的加扰序列不同,因此,可以解决基站使用该多个波束同时向同一个UE发送PDCCH的场景中,导致的多个波束之间自干扰的问题。并且,可以解决基站使用多个波束依次向同一个UE发送PDCCH的场景中,导致的没有充分利用多个波束的问题。In this embodiment, the base station considers the beam in the process of performing the cyclic shift operation, so that the symbol sequences obtained by cyclically shifting the PDCCHs transmitted on different beams may be different, so that PDCCHs transmitted on different beams may use different PDCCHs. The randomization technique can improve the effect of randomization and can reduce the interference caused by the multi-beam base station to the neighboring area. Optionally, since the technical solution can implement different scrambling sequences corresponding to any multiple beams, the scenario in which the base station uses the multiple beams to simultaneously send the PDCCH to the same UE may be used. The problem of interference. Moreover, the problem that the base station uses multiple beams to sequentially transmit PDCCHs to the same UE may be solved, and the problem that the multiple beams are not fully utilized is caused.
可以理解的,实际实现时,S507可以被替换为S307。也就是说,基站在执行加扰操作和循环移位操作的过程中均考虑波束。这样,能够更好地解决LTE系统中提供的技术方案所带来的技术问题。It can be understood that, in actual implementation, S507 can be replaced with S307. That is, the base station considers the beam in both the scrambling operation and the cyclic shift operation. In this way, the technical problems brought by the technical solutions provided in the LTE system can be better solved.
如图14所示,为本申请实施例提供的一种信息传输方法的流程示意图。需要说明的是,图14中是以UE对一个波束上传输的PDCCH进行处理为例进行说明的。该方法可以包括如下步骤S601~S609:FIG. 14 is a schematic flowchart diagram of an information transmission method provided by an embodiment of the present application. It should be noted that FIG. 14 is an example in which the UE processes the PDCCH transmitted on one beam as an example. The method may include the following steps S601 to S609:
S601:可以参考S401,也可以采用其他方法,本发明对此不予限定。S601: Reference may be made to S401, and other methods may be used, which are not limited by the present invention.
S602:可以参考S202,也可以采用其他方法,本发明对此不予限定。S602: Reference may be made to S202, and other methods may also be used, which are not limited by the present invention.
S603:UE根据波束指示信息,对FFT后得到的符号序列进行解交织和循环移位逆操作。S603: The UE performs deinterleaving and cyclic shift inverse operations on the symbol sequence obtained after the FFT according to the beam indication information.
具体的,UE对FFT后得到的符号序列进行解交织,然后,根据波束指示信息对解交织后得到的符号序列进行循环移位逆操作。其中,UE执行解交织的步骤是可选的步骤,至于是否执行该步骤与基站侧是否执行交织的步骤有关。例如,若基站执行了交织的步骤,则UE 需要执行解交织的步骤。Specifically, the UE deinterleaves the symbol sequence obtained after the FFT, and then performs a cyclic shift inverse operation on the symbol sequence obtained after the deinterleaving according to the beam indication information. The step of performing deinterleaving by the UE is an optional step, and whether the step is performed is related to a step of performing interleaving on the base station side. For example, if the base station performs the interleaving step, the UE needs to perform the step of deinterleaving.
如图15所示,UE根据波束指示信息进行循环移位逆操作,可以包括以下步骤W1:As shown in FIG. 15, the UE performs a cyclic shift inverse operation according to the beam indication information, and may include the following step W1:
W1:UE根据波束指示信息和小区索引,对第二符号组进行循环移位操作,得到第一符号组。W1: The UE performs a cyclic shift operation on the second symbol group according to the beam indication information and the cell index, to obtain a first symbol group.
其中,W1与图13中的N1对应,其具体实现过程可以参考上文,此处不再赘述。另外,波束指示信息的相关描述也可以参考上文。示例的,UE根据公式
得到第二符号组;其中,
表示第二符号组中的第i个符号,w(i)表示第一符号组中的第i个符号,
表示小区索引,offset表示波束指示信息。其具体实现过程可以参考上述步骤N1。
The W1 corresponds to the N1 in FIG. 13 , and the specific implementation process may refer to the foregoing, and details are not described herein again. In addition, the related description of the beam indication information can also refer to the above. Example, UE according to the formula Obtaining a second symbol group; wherein Representing the ith symbol in the second symbol group, w(i) representing the ith symbol in the first symbol group, Indicates a cell index, and offset indicates beam indication information. For the specific implementation process, reference may be made to the above step N1.
可以理解的,若UE不执行解交织的步骤,则第二符号组是FFT后输出的符号序列。若UE执行解交织的步骤,则第二符号组是解交织后输出的符号序列。It can be understood that if the UE does not perform the step of deinterleaving, the second symbol group is a symbol sequence output after the FFT. If the UE performs the step of deinterleaving, the second symbol group is a sequence of symbols output after deinterleaving.
另外,该方法还可以包括:UE通过RRC信令、MAC信令或DCI接收波束指示信息。其中,具体通过哪种信令接收波束指示信息与基站使用哪种信令发送波束指示信息有关。例如,若基站使用RRC信令发送波束指示信息,则UE使用RRC信令接收波束指示信息。其他的示例不再一一列举。In addition, the method may further include: the UE receiving the beam indication information by using RRC signaling, MAC signaling, or DCI. Specifically, which signaling receiving beam indication information is related to which signaling information used by the base station to transmit beam indication information. For example, if the base station transmits beam indication information using RRC signaling, the UE receives beam indication information using RRC signaling. Other examples are not listed one by one.
S604~S609:可以参考S204~S209,也可以采用其他方法,本发明对此不予限定。S604 to S609: S204 to S209 may be referred to, and other methods may be used. The present invention does not limit this.
需要说明的是,上述S601~S609中的部分步骤可以是可选的步骤,另外,本申请实施例对S601~S609中任意两个步骤的执行顺序不进行限定。It should be noted that some of the steps S601 to S609 may be optional steps. In addition, the execution sequence of any two steps S601 to S609 is not limited in the embodiment of the present application.
本实施例中,UE在执行循环移位逆操作的过程中考虑了波束,该循环移位逆操作的过程与图12所示的实施例中的循环移位的过程是对应的,因此,其所能达到的有益效果可以参考图12所示的实施例,此处不再赘述。In this embodiment, the UE considers a beam in the process of performing a cyclic shift inverse operation, and the process of the cyclic shift inverse operation corresponds to the cyclic shift process in the embodiment shown in FIG. 12, and therefore, For the beneficial effects that can be achieved, reference may be made to the embodiment shown in FIG. 12, and details are not described herein again.
可以理解的,若S507被替换为S307,则本实施例中的S605可以被替换为S405。其所能达到的有益效果可以参考上文,此处不再赘述。It can be understood that if S507 is replaced with S307, S605 in this embodiment may be replaced with S405. The beneficial effects that can be achieved can be referred to the above, and will not be repeated here.
可以理解的,图13和图14是以“传输PDCCH的过程中,执行循环移位操作或循环移位逆操作时考虑了波束”为例进行说明的,实际实现时,本申请实施例对此不进行限定,例如,本申请实施例提供的技术方案还可以适用于传输PUCCH的场景中,例如,传输PUCCH的格式3时,
其中,
表示待进行循环移位的符号序列,
表示循环移位后得到的符号序列,n
s表示slot号,
表示一个资源块(resource block,RB)的子载波数。
It can be understood that FIG. 13 and FIG. 14 are described as an example of "considering a beam when performing a cyclic shift operation or a cyclic shift inverse operation in the process of transmitting a PDCCH". In actual implementation, this embodiment of the present application For example, when the PUCCH format 3 is transmitted, the technical solution provided by the embodiment of the present application may also be applied to a scenario in which a PUCCH is transmitted. among them, a sequence of symbols representing the cyclic shift to be performed, Represents the sequence of symbols obtained after cyclic shift, and n s represents the slot number. Indicates the number of subcarriers of a resource block (RB).
上述主要从各个网元之间交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是,各个网元,例如网络设备(如基站)或者终端设备(如UE)。为了实现上述功能,其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。The solution provided by the embodiment of the present application is mainly introduced from the perspective of interaction between the network elements. It can be understood that each network element, such as a network device (such as a base station) or a terminal device (such as a UE). In order to implement the above functions, it includes hardware structures and/or software modules corresponding to the execution of the respective functions. Those skilled in the art will readily appreciate that the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
本申请实施例可以根据上述方法示例对网络设备或者终端设备进行功能模块的划分,例 如,可以对应各个功能划分各个功能模块,也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。需要说明的是,本申请实施例中对模块的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。下面以采用对应各个功能划分各个功能模块为例进行说明:The embodiment of the present application may perform the division of the function module on the network device or the terminal device according to the foregoing method example. For example, each function module may be divided according to each function, or two or more functions may be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner. The following is an example of dividing each functional module by using corresponding functions:
图16示出了一种信息传输装置160的结构示意图。该信息传输装置160可以是上文中涉及的网络设备100,如基站。该信息传输装置160可以包括加扰单元1601、映射单元1602和发送单元1603。其中,加扰单元1601可以用于执行图8中的S307,图9中的各步骤,和/或用于支持本文所描述的技术的其它过程。映射单元1602可以用于执行图8中的S311,和/或用于支持本文所描述的技术的其它过程。发送单元1603可以用于执行图8中的S311,和/或用于支持本文所描述的技术的其它过程。其中,上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述,在此不再赘述。FIG. 16 shows a schematic structural diagram of an information transmission device 160. The information transmission device 160 may be the network device 100, such as a base station, referred to above. The information transmission device 160 may include a scrambling unit 1601, a mapping unit 1602, and a transmitting unit 1603. The scrambling unit 1601 can be used to perform the steps S307 in FIG. 8, the steps in FIG. 9, and/or other processes for supporting the techniques described herein. Mapping unit 1602 can be used to perform S311 in FIG. 8, and/or other processes for supporting the techniques described herein. Transmitting unit 1603 can be used to perform S311 in FIG. 8, and/or other processes for supporting the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
图17示出了一种信息传输装置170的结构示意图。该信息传输装置170可以是上文中涉及的终端设备200,如UE。该信息传输装置170可以包括接收单元1701、获取单元1702和解扰单元1703。其中,接收单元1701可以用于执行图10中的S401,图11中的各步骤,和/或用于支持本文所描述的技术的其它过程。获取单元1702可以用于执行图10中的S402,和/或用于支持本文所描述的技术的其它过程。解扰单元1703可以用于执行图10中的S405,和/或用于支持本文所描述的技术的其它过程。其中,上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述,在此不再赘述。FIG. 17 shows a schematic structural diagram of an information transmission device 170. The information transmission device 170 may be the terminal device 200, such as a UE, referred to above. The information transmission device 170 may include a receiving unit 1701, an obtaining unit 1702, and a descrambling unit 1703. The receiving unit 1701 may be used to execute S401 in FIG. 10, the steps in FIG. 11, and/or other processes for supporting the techniques described herein. The obtaining unit 1702 can be used to perform S402 in FIG. 10, and/or other processes for supporting the techniques described herein. The descrambling unit 1703 can be used to perform S405 in FIG. 10, and/or other processes for supporting the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
图18示出了一种信息传输装置180的结构示意图。该信息传输装置180可以是上文中涉及的网络设备100,如基站。该信息传输装置180可以包括:循环移位单元1801、映射单元1802和发送单元1803。其中,循环移位单元1801可以用于执行图12中的S510,图13中的N1,和/或用于支持本文所描述的技术的其它过程。映射单元1802可以用于执行图12中的S511,和/或用于支持本文所描述的技术的其它过程。发送单元1803可以用于执行图12中的S513,和/或用于支持本文所描述的技术的其它过程。其中,上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述,在此不再赘述。FIG. 18 shows a schematic structural diagram of an information transmission device 180. The information transmission device 180 can be the network device 100, such as a base station, referred to above. The information transmission device 180 may include a cyclic shift unit 1801, a mapping unit 1802, and a transmitting unit 1803. Wherein, the cyclic shift unit 1801 can be used to perform S510 in FIG. 12, N1 in FIG. 13, and/or other processes for supporting the techniques described herein. Mapping unit 1802 can be used to perform S511 in FIG. 12, and/or other processes for supporting the techniques described herein. Transmitting unit 1803 can be used to perform S513 in FIG. 12, and/or other processes for supporting the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
图19示出了一种信息传输装置190的结构示意图。该信息传输装置190可以是上文中涉及的终端设备200,例如UE。该信息传输装置190可以包括:接收单元1901、获取单元1902和循环移位逆操作单元1903。其中,接收单元1901可以用于执行图14中的S601,和/或用于支持本文所描述的技术的其它过程。获取单元1902可以用于执行图14中的S602,和/或用于支持本文所描述的技术的其它过程。循环移位逆操作单元1903可以用于执行图14中的S603,和/或用于支持本文所描述的技术的其它过程。其中,上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述,在此不再赘述。FIG. 19 shows a schematic structural diagram of an information transmission device 190. The information transmission device 190 may be the terminal device 200, such as a UE, referred to above. The information transmission device 190 may include a receiving unit 1901, an obtaining unit 1902, and a cyclic shift inverse operation unit 1903. Wherein, the receiving unit 1901 can be used to execute S601 in FIG. 14, and/or other processes for supporting the techniques described herein. The obtaining unit 1902 can be used to perform S602 in FIG. 14, and/or other processes for supporting the techniques described herein. The cyclic shift inverse operation unit 1903 can be used to perform S603 in FIG. 14, and/or other processes for supporting the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
在本申请实施例中,信息传输装置160~190对应各个功能划分各个功能模块的形式来呈现,或者,该以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定应用集成电路(application-specific integrated circuit,ASIC),执行一个或多个软件或固件程序的处理器和存储器,集成逻辑电路,和/或其他可以提供上述功能的器件,其中,所述处理器与存储器可以集成在一起,也可以相对独立。In the embodiment of the present application, the information transmission devices 160 to 190 are presented in a form in which each function is divided into individual functional modules, or are presented in an integrated manner to divide the functional modules. A "module" herein may refer to an application-specific integrated circuit (ASIC), a processor and memory that executes one or more software or firmware programs, integrated logic circuits, and/or other devices that provide the above functionality. The processor and the memory may be integrated or may be relatively independent.
在一个简单的实施例中,本领域的技术人员可以想到将信息传输装置160~190中的任一种信息传输装置通过如图20所示的结构实现。In a simple embodiment, those skilled in the art will appreciate that any of the information transmission devices 160 to 190 can be realized by the structure shown in FIG.
如图20所示,信息传输装置210可以包括:存储器2101、处理器2102、以及通信接口2103。其中存储器2102用于存储计算机执行指令,当信息传输装置210运行时,处理器2101执行存储器2102存储的计算机执行指令,以使信息传输装置210执行本申请实施例提供的信息传输方法。具体的信息传输方法可参考上文及附图中的相关描述,此处不再赘述。其中,通信接口2103可以是收发器。As shown in FIG. 20, the information transmission device 210 may include a memory 2101, a processor 2102, and a communication interface 2103. The memory 2102 is configured to store computer execution instructions. When the information transmission device 210 is in operation, the processor 2101 executes the computer execution instructions stored in the memory 2102 to enable the information transmission device 210 to execute the information transmission method provided by the embodiment of the present application. For specific information transmission methods, refer to the related descriptions in the above and the drawings, and details are not described herein again. The communication interface 2103 can be a transceiver.
在一个示例中,发送单元1603可以对应图20中的通信接口2103。加扰单元1601和映射单元1602可以以硬件形式内嵌于或独立于信息传输装置210的存储器2101中。In one example, the transmitting unit 1603 can correspond to the communication interface 2103 in FIG. The scrambling unit 1601 and the mapping unit 1602 may be embedded in hardware or in a memory 2101 independent of the information transmission device 210.
在另一个示例中,接收单元1701可以对应图20中的通信接口2103。获取单元1702和解扰单元1703可以以硬件形式内嵌于或独立于信息传输装置210的存储器2101中。In another example, receiving unit 1701 may correspond to communication interface 2103 in FIG. The obtaining unit 1702 and the descrambling unit 1703 may be embedded in hardware or in a memory 2101 independent of the information transmission device 210.
在另一个示例中,发送单元1803可以对应图20中的通信接口2103。循环移位单元1801和映射单元1802可以以硬件形式内嵌于或独立于信息传输装置210的存储器2101中。In another example, the transmitting unit 1803 can correspond to the communication interface 2103 in FIG. The cyclic shift unit 1801 and the mapping unit 1802 may be embedded in hardware or in a memory 2101 independent of the information transmission device 210.
在另一个示例中,接收单元1901可以对应图20中的通信接口2103。获取单元1902和循环移位逆操作单元1903可以以硬件形式内嵌于或独立于信息传输装置210的存储器2101中。In another example, receiving unit 1901 can correspond to communication interface 2103 in FIG. The acquisition unit 1902 and the cyclic shift inverse operation unit 1903 may be embedded in hardware or in a memory 2101 independent of the information transmission device 210.
可选的,信息传输装置210可以是现场可编程门阵列(field-programmable gate array,FPGA),专用集成芯片(application specific integrated circuit,ASIC),系统芯片(system on chip,SoC),中央处理器(central processor unit,CPU),网络处理器(network processor,NP),数字信号处理电路(digital signal processor,DSP),微控制器(micro controller unit,MCU),还可以采用可编程控制器(programmable logic device,PLD)或其他集成芯片。Optionally, the information transmission device 210 may be a field-programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processing unit. (central processor unit, CPU), network processor (NP), digital signal processor (DSP), microcontroller (micro controller unit (MCU), can also use programmable controller (programmable Logic device, PLD) or other integrated chip.
本申请实施例还提供一种存储介质,该存储介质可以包括存储器1602或存储器1702或存储器1802或存储器1902。The embodiment of the present application further provides a storage medium, which may include a memory 1602 or a memory 1702 or a memory 1802 or a memory 1902.
由于本申请实施例提供的信息传输装置可用于执行上述信息传输方法,因此其所能获得的技术效果可参考上述方法实施例,本申请实施例在此不再赘述。The information transmission device provided by the embodiment of the present application can be used to perform the foregoing information transmission method. Therefore, the technical effects of the present invention can be referred to the foregoing method embodiments.
在上述实施例中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时,可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输,例如,所述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line,DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可以用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如,软盘、硬盘、磁带),光介质(例如,DVD)、或者半导体介质(例如固态硬盘(solid state disk,SSD))等。In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transmission to another website site, computer, server or data center via wired (eg coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device that includes one or more servers, data centers, etc. that can be integrated with the media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)) or the like.
尽管在此结合各实施例对本申请进行了描述,然而,在实施所要求保护的本申请过程中,本领域技术人员通过查看所述附图、公开内容、以及所附权利要求书,可理解并实现所述公开实施例的其他变化。在权利要求中,“包括”(comprising)一词不排除其他组成部分或步骤,“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施,但这并不表示这些措施不能组合起来产生良好的效果。Although the present application has been described herein in connection with the various embodiments, those skilled in the art can Other variations of the disclosed embodiments are achieved. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill several of the functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that the measures are not combined to produce a good effect.
尽管结合具体特征及其实施例对本申请进行了描述,显而易见的,在不脱离本申请的精神和范围的情况下,可对其进行各种修改和组合。相应地,本说明书和附图仅仅是所附权利要求所界定的本申请的示例性说明,且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然,本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样,倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本申请也意图包含这些改动和变型在内。While the present invention has been described in connection with the specific embodiments and embodiments thereof, various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the description and drawings are to be regarded as It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.
Claims (21)
- 一种信息传输方法,其特征在于,所述方法包括:An information transmission method, characterized in that the method comprises:根据波束指示信息,获取加扰后的比特序列;Obtaining the scrambled bit sequence according to the beam indication information;将所述加扰后的比特序列经调制后映射至时频资源上;And the modulated bit sequence is modulated and mapped to a time-frequency resource;通过所述波束指示信息所指示的波束,向终端设备发送映射至时频资源上的所述加扰后的比特序列。And transmitting, by the beam indicated by the beam indication information, the scrambled bit sequence mapped to the time-frequency resource to the terminal device.
- 根据权利要求1所述的方法,其特征在于,所述根据波束指示信息,获取加扰后的比特序列,包括:The method according to claim 1, wherein the obtaining the scrambled bit sequence according to the beam indication information comprises:根据波束指示信息,获取加扰序列的初始化因子;Obtain an initialization factor of the scrambling sequence according to the beam indication information;根据所述加扰序列的初始化因子,确定所述加扰序列;Determining the scrambling sequence according to an initialization factor of the scrambling sequence;根据所述加扰序列,对待加扰比特序列进行加扰,得到加扰后的比特序列。The scrambling bit sequence is scrambled according to the scrambling sequence to obtain a scrambled bit sequence.
- 根据权利要求2所示的方法,其特征在于,所述根据波束指示信息,获取加扰序列的初始化因子,包括:The method according to claim 2, wherein the acquiring an initialization factor of the scrambling sequence according to the beam indication information comprises:根据波束指示信息、小区索引和时隙号,获取加扰序列的初始化因子。The initialization factor of the scrambling sequence is obtained according to the beam indication information, the cell index, and the slot number.
- 根据权利要求3所述的方法,其特征在于,所述根据波束指示信息、小区索引和时隙号,获取加扰序列的初始化因子,包括:The method according to claim 3, wherein the obtaining an initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number includes:根据公式 获取加扰序列的初始化因子c init;其中, 表示向下取整,n s表示时隙号, 表示小区索引,offset表示与所述波束指示信息相关的一个值。 According to the formula Obtain the initialization factor c init of the scrambling sequence; where Indicates rounding down, n s is the slot number, Indicates a cell index, and offset represents a value associated with the beam indication information.
- 根据权利要求1至4任一项所述的方法,其特征在于,所述方法还包括:The method according to any one of claims 1 to 4, further comprising:通过无线资源控制RRC信令、媒体访问控制MAC信令或下行控制信息DCI向所述终端设备发送所述波束指示信息。The beam indication information is sent to the terminal device by radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
- 一种信息传输方法,其特征在于,所述方法包括:An information transmission method, characterized in that the method comprises:接收来自所述基站的、通过波束发送的信号,对所述信号号进行解调,获取比特序列;Receiving, by the base station, a signal transmitted by a beam, demodulating the signal number, and acquiring a bit sequence;根据所述波束关联的波束指示信息,对所述比特序列解扰。Decoding the bit sequence according to the beam indication information associated with the beam.
- 根据权利要求8所述的方法,其特征在于,所述根据所述波束指示信息,对所述比特序列进行解扰,包括:The method according to claim 8, wherein the descrambling the bit sequence according to the beam indication information comprises:根据所述波束指示信息,获取加扰序列的初始化因子;Obtaining an initialization factor of the scrambling sequence according to the beam indication information;根据所述加扰序列的初始化因子,确定所述加扰序列;Determining the scrambling sequence according to an initialization factor of the scrambling sequence;根据所述加扰序列,对所述比特序列进行解扰。The bit sequence is descrambled according to the scrambling sequence.
- 根据权利要求7所述的方法,其特征在于,所述根据所述波束指示信息,获取加扰序列的初始化因子,包括:The method according to claim 7, wherein the obtaining an initialization factor of the scrambling sequence according to the beam indication information comprises:根据所述波束指示信息、小区索引和时隙号,获取加扰序列的初始化因子。An initialization factor of the scrambling sequence is obtained according to the beam indication information, the cell index, and the slot number.
- 根据权利要求8所述的方法,其特征在于,所述根据所述波束指示信息、小区索引和时隙号,获取加扰序列的初始化因子,包括:The method according to claim 8, wherein the acquiring an initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number includes:根据公式 获取加扰序列的初始化因子c init;其中, 表示向下取整,n s表示时隙号, 表示小区索引,offset表示与所述波束指示信息相关的一个值。 According to the formula Obtain the initialization factor c init of the scrambling sequence; where Indicates rounding down, n s is the slot number, Indicates a cell index, and offset represents a value associated with the beam indication information.
- 根据权利要求6至9任一项所述的方法,其特征在于,所述方法还包括:The method according to any one of claims 6 to 9, wherein the method further comprises:通过无线资源控制RRC信令、媒体访问控制MAC信令或下行控制信息DCI接收所述波束指示信息。The beam indication information is received by radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
- 一种信息传输方法,其特征在于,所述方法包括:An information transmission method, characterized in that the method comprises:根据波束指示信息,对第一符号组进行循环移位,得到第二符号组;其中,所述第一符号组是对原始数据比特进行调制后得到的符号组;And cyclically shifting the first symbol group according to the beam indication information to obtain a second symbol group; wherein the first symbol group is a symbol group obtained by modulating original data bits;将所述第二符号组映射至时频资源上;Mapping the second symbol group to a time-frequency resource;通过所述波束指示信息所指示的波束,向终端设备发送映射至时频资源上的所述第二符号组。And transmitting, by the beam indicated by the beam indication information, the second symbol group mapped to the time-frequency resource to the terminal device.
- 根据权利要求11所述的方法,其特征在于,所述根据波束指示,对第一符号组进行循环移位,得到第二符号组;The method according to claim 11, wherein the cyclically shifting the first symbol group according to the beam indication to obtain a second symbol group;根据波束指示信息和小区索引,对第一符号组进行循环移位,得到第二符号组。The first symbol group is cyclically shifted according to the beam indication information and the cell index to obtain a second symbol group.
- 根据权利要求12所述的方法,其特征在于,所述根据波束指示信息和小区索引,对第一符号组进行循环移位,得到第二符号组,包括:The method according to claim 12, wherein the cyclically shifting the first symbol group according to the beam indication information and the cell index to obtain the second symbol group comprises:根据公式 得到第二符号组;其中,w(i)表示第一符号组中的第i个元素, 表示第二符号组中的第i个元素,所述 表示小区索引,offset表示与所述波束指示信息相关的一个值。 According to the formula Obtaining a second symbol group; wherein w(i) represents an ith element in the first symbol group, Representing the i-th element in the second symbol group, Indicates a cell index, and offset represents a value associated with the beam indication information.
- 根据权利要求11至13任一项所述的方法,其特征在于,所述方法还包括:The method according to any one of claims 11 to 13, wherein the method further comprises:通过无线资源控制RRC信令、媒体访问控制MAC信令或下行控制信息DCI向所述终端设备发送所述波束指示信息。The beam indication information is sent to the terminal device by radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
- 一种信息传输方法,其特征在于,所述方法包括:An information transmission method, characterized in that the method comprises:接收通过波束发送的映射至时频资源上的第二符号组;其中,所述第二符号组是根据波束指示信息对第一符号组进行循环移位后得到的符号组,所述第一符号组是对原始数据比特进行调制后得到的符号组,所述波束指示信息用于指示所述波束;And receiving, by the beam, a second symbol group mapped to the time-frequency resource, where the second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information, where the first symbol The group is a symbol group obtained by modulating original data bits, and the beam indication information is used to indicate the beam;从所述时频资源上,获取所述第二符号组;Obtaining the second symbol group from the time-frequency resource;根据所述波束指示信息,对所述第二符号组进行循环移位逆操作,得到所述第一符号组。Performing a cyclic shift inverse operation on the second symbol group according to the beam indication information to obtain the first symbol group.
- 根据权利要求15所述的方法,其特征在于,所述根据所述波束指示信息,对所述第二符号组进行循环移位逆操作,得到所述第一符号组,包括:The method according to claim 15, wherein the performing a cyclic shift inverse operation on the second symbol group according to the beam indication information to obtain the first symbol group comprises:根据所述波束指示信息和小区索引,对所述第二符号组进行循环移位逆操作,得到所述第一符号组。And performing cyclic shift inverse operation on the second symbol group according to the beam indication information and the cell index, to obtain the first symbol group.
- 根据权利要求16所述的方法,其特征在于,所述根据所述波束指示信息和小区索引,对所述第二符号组进行循环移位逆操作,得到所述第一符号组,包括:The method according to claim 16, wherein the performing the cyclic shift inverse operation on the second symbol group according to the beam indication information and the cell index, to obtain the first symbol group, comprising:根据公式 得到所述第一符号组;其中, 表示所述第二符号组中的第i个元素,w(i)表示所述第一符号组中的第i个元素,所述 表示小区索引,offset表示与所述波束指示信息相关的一个值。 According to the formula Obtaining the first symbol group; wherein Representing an i-th element in the second symbol group, w(i) representing an i-th element in the first symbol group, Indicates a cell index, and offset represents a value associated with the beam indication information.
- 根据权利要求1至17任一项所述的方法,其特征在于,所述波束指示信息包括以下信息中的至少一种:波束的相对编号,波束的逻辑编号,波束的物理编号,端口号、准共址QCL信息、波束对连接信息,终端设备组,波束对应的时域符号; 其中,每个波束对应的终端设备为一个终端设备组。The method according to any one of claims 1 to 17, wherein the beam indication information comprises at least one of the following: a relative number of beams, a logical number of a beam, a physical number of a beam, a port number, The quasi-co-located QCL information, the beam pair connection information, the terminal device group, and the time domain symbol corresponding to the beam; wherein, the terminal device corresponding to each beam is a terminal device group.
- 根据权利要求15至18任一项所述的方法,其特征在于,所述方法还包括:The method according to any one of claims 15 to 18, wherein the method further comprises:通过无线资源控制RRC信令、媒体访问控制MAC信令或下行控制信息DCI接收所述波束指示信息。The beam indication information is received by radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
- 一种信息传输装置,用于执行如权利要求1至19任一项所述的方法。An information transmission device for performing the method according to any one of claims 1 to 19.
- 一种计算机可读存储介质,其上存储有计算机程序,其特征在于,该程序被处理器执行时用以实现如权利要求1至19任意一项所述的方法。A computer readable storage medium having stored thereon a computer program, wherein the program is executed by a processor to implement the method of any one of claims 1 to 19.
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