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WO2018171694A1 - Procédé et appareil de transmission d'informations - Google Patents

Procédé et appareil de transmission d'informations Download PDF

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Publication number
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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WIPO (PCT)
Prior art keywords
indication information
symbol group
beam indication
symbol
information
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PCT/CN2018/080098
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English (en)
Chinese (zh)
Inventor
管鹏
Original Assignee
华为技术有限公司
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Filing date
Publication date
Priority claimed from CN201710194154.2A external-priority patent/CN108632841B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2018171694A1 publication Critical patent/WO2018171694A1/fr

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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

La présente invention concerne un procédé et un appareil de transmission d'informations, concernant le domaine technique des communications. La solution technique prend en compte l'influence d'un faisceau sur la transmission d'informations, de façon à améliorer les performances du système. Le procédé peut comprendre : l'acquisition d'une séquence de bits brouillée conformément à des informations d'indication de faisceau ; la modulation de la séquence de bits brouillée, puis la mise en correspondance de celle-ci avec une ressource temps-fréquence ; et l'envoi, au moyen d'un faisceau indiqué par les informations d'indication de faisceau, de la séquence de bits brouillée, mise en correspondance avec la ressource temps-fréquence, à un dispositif de terminal.
PCT/CN2018/080098 2017-03-24 2018-03-23 Procédé et appareil de transmission d'informations WO2018171694A1 (fr)

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CN201710184890 2017-03-24
CN201710194154.2A CN108632841B (zh) 2017-03-24 2017-03-28 一种信息传输方法和装置
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Citations (3)

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Publication number Priority date Publication date Assignee Title
US20150288439A1 (en) * 2014-04-02 2015-10-08 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving single stream through multiple beams in wireless communication system
CN106412942A (zh) * 2015-07-31 2017-02-15 株式会社Ntt都科摩 波束参考信号的发送方法、波束选择方法、基站及用户终端
WO2017034607A1 (fr) * 2015-08-27 2017-03-02 Intel IP Corporation Commande de mobilité inter-faisceau dans des systèmes de communication mimo

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150288439A1 (en) * 2014-04-02 2015-10-08 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving single stream through multiple beams in wireless communication system
CN106412942A (zh) * 2015-07-31 2017-02-15 株式会社Ntt都科摩 波束参考信号的发送方法、波束选择方法、基站及用户终端
WO2017034607A1 (fr) * 2015-08-27 2017-03-02 Intel IP Corporation Commande de mobilité inter-faisceau dans des systèmes de communication mimo

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