WO2018171694A1

WO2018171694A1 - Information transmission method and apparatus

Info

Publication number: WO2018171694A1
Application number: PCT/CN2018/080098
Authority: WO
Inventors: 管鹏
Original assignee: 华为技术有限公司
Priority date: 2017-03-24
Filing date: 2018-03-23
Publication date: 2018-09-27

Abstract

Disclosed are an information transmission method and apparatus, relating to the technical field of communications. The technical solution takes the influence of a beam on information transmission into consideration, so as to improve the system performance. The method may comprise: acquiring a scrambled bit sequence according to beam indication information; modulating the scrambled bit sequence, and then mapping same to a time-frequency resource; and sending, by means of a beam indicated by the beam indication information, the scrambled bit sequence, mapped to the time-frequency resource, to a terminal device.

Description

Information transmission method and device

Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to an information transmission method and apparatus.

Background technique

In a long term evolution (LTE) system, a physical layer processing procedure of a physical downlink control channel (PDCCH) of a base station includes: performing channel coding, rate matching, scrambling, and modulation on original data bits by a base station. , cyclic shift, and resource mapping and other operations are sent out. This technical solution is no longer suitable for the needs of New Radio (NR) NR.

Summary of the invention

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.

In order to improve the effect of randomization, and reduce the interference caused by the multi-beam base station to the neighboring area. The application provides the following technical solutions:

In a first aspect, the present application provides a scrambling method and apparatus.

In one design, the scrambling method includes obtaining a scrambled bit sequence based on the beam indication information. The scrambled bit sequence may be a bit sequence obtained by scrambling any channel or data, which is not limited in this application. In the technical solution, the beam is considered in the process of performing the scrambling operation, so that the PDCCH transmitted on different beams can be scrambled using different scrambling sequences, so that different beams can use different randomization techniques, so that The effect of randomization is improved, and the interference caused by the multi-beam base station to the neighboring area can be reduced.

And obtaining, according to the beam indication information, the scrambled bit sequence, comprising: acquiring an initialization factor of the scrambling sequence according to the beam indication information. The scrambling sequence is then determined based on the initialization factor of the scrambling sequence. Then, according to the scrambling sequence, the scrambled bit sequence is scrambled to obtain a scrambled bit sequence. The optional implementation provides a manner of performing a scrambling operation according to the beam indication information, and the specific implementation is not limited thereto.

In another design, the scrambling method includes generating an initialization factor associated with beam indication information, obtaining a scrambling sequence based on the initialization factor, and scrambling the scrambling sequence based on the scrambling sequence. In this design, since the scrambling sequence is obtained based on the initialization factor and the initialization factor is associated with the beam indication information, the beam correlation information is fully considered in the process of scrambling using the scrambling sequence, so that different The beam can use different randomization techniques to improve the randomization effect and reduce the interference caused by the multi-beam base station to the neighboring area.

Correspondingly, the present application also provides a scrambling device, which can implement the above scrambling method. For example, the scrambling device may be a chip (such as a baseband chip, or a communication chip, etc.) or a transmitting device (such as a base station, or a terminal, etc.). The above method can be implemented by software, hardware, or by executing corresponding software by hardware.

In a possible implementation, the scrambling device comprises a processor and a memory. The processor is configured to support the apparatus to perform the corresponding function of the scrambling method described above. The memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device. Optionally, the scrambling device may further comprise a communication interface for supporting communication between the device and other network elements. The communication interface can be a transceiver.

In another possible implementation manner, the apparatus may include: a scrambling unit, configured to acquire the scrambled bit sequence according to the beam indication information. Optionally, the scrambling unit is specifically configured to: obtain an initialization factor of the scrambling sequence according to the beam indication information. The scrambling sequence is then determined based on the initialization factor of the scrambling sequence. Then, according to the scrambling sequence, the scrambled bit sequence is scrambled to obtain a scrambled bit sequence.

In a second aspect, the present application provides a descrambling method and apparatus.

In one design, the method includes descrambling the scrambled bit sequence based on the beam indication information. The technical solution corresponds to the scrambling method provided by the first aspect, and therefore the beneficial effects that can be achieved can be referred to the above, and are not described herein again.

It can be understood that if the scrambled bit sequence is applied to the downlink transmission process, the execution body of the method may be a terminal device (such as a UE). If the scrambled bit sequence is applied to the uplink transmission process, the executor of the method may be a network device (e.g., a base station).

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.

In another design, the method includes generating an initialization factor associated with beam indication information, obtaining a scrambling sequence based on the initialization factor, and descrambling the sequence to be descrambled based on the scrambling sequence. Since the designation of the initialization factor makes the scrambling sequence consider the beam indication information, the randomization effect can be better improved and the interference can be reduced.

Correspondingly, the present application also provides a descrambling device, which can implement the above-described descrambling method. For example, the descrambling device may be a chip (such as a baseband chip, or a communication chip, etc.) or a transmitting device (such as a base station, or a terminal, etc.). The above method can be implemented by software, hardware, or by executing corresponding software by hardware.

In a possible implementation, the structure of the descrambling device includes a processor and a memory; the processor is configured to support the device to perform a corresponding function in the above scrambling method. The memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device. Optionally, the descrambling device may further comprise a communication interface for supporting communication between the device and other network elements. The communication interface can be a transceiver.

In another possible implementation manner, the descrambling device may include a descrambling unit, configured to descramble the scrambled bit sequence according to the beam indication information. Optionally, the descrambling unit may be specifically configured to: first, obtain an initialization factor of the scrambling sequence according to the beam indication information. The scrambling sequence is then determined based on the initialization factor of the scrambling sequence. Then, the scrambled bit sequence is descrambled according to the scrambling sequence.

Based on the above-described scrambling method and descrambling method, in the above-mentioned scrambling or descrambling scheme, the initialization factor of the scrambling sequence can be acquired according to the beam indication information, the cell information, and the slot number. The cell information may be a cell identifier (ID), or a cell index, information obtained based on a cell ID or a cell index, or information related to cell information. The slot number may be a slot number of a slot occupied when transmitting the scrambled bit sequence.

In an optional implementation manner, acquiring an initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number may include: according to a formula

Obtain the initialization factor c _{init of the} scrambling sequence; where

Indicates rounding down, n _s is the slot number,

Indicates a cell index, and offset represents a value associated with the beam indication information.

In a third aspect, the present application provides an information transmission method, and an execution body of the method may be a transmitting device. The method includes obtaining a scrambled bit sequence according to beam indication information. Then, the scrambled bit sequence is modulated and mapped to the time-frequency resource, and the scrambled bit sequence mapped to the time-frequency resource is transmitted through the beam indicated by the beam indication information. In the technical solution, the transmitting device considers the beam in the process of performing the scrambling operation, and the explanation of the related content, the specific implementation manner of the related steps, and the beneficial effects can all refer to the description in the above-mentioned scrambling scheme.

In a possible implementation, the beam indication information may be sent to the terminal device by using RRC signaling, MAC signaling, or DCI.

Correspondingly, an information transmission apparatus is further provided to implement the information transmission method of the third aspect. The device can be implemented by software, or hardware, or by hardware to execute corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In a possible implementation manner, the apparatus may include: a scrambling unit, a mapping unit, and a sending unit. The scrambling unit is configured to obtain the scrambled bit sequence according to the beam indication information. a mapping unit, configured to map the scrambled bit sequence to a time-frequency resource. The transmitting unit transmits the scrambled bit sequence mapped to the time-frequency resource by using the beam indicated by the beam indication information.

In another possible implementation, the apparatus includes a processor, a memory, and a communication interface; the processor is configured to support the apparatus to perform a corresponding function in the method of the third aspect described above. The communication interface is used to support communication between the device and other network elements. The memory is for coupling to a processor that holds the program instructions and data necessary for the device. The communication interface may specifically be a transceiver.

In a fourth aspect, the present application provides an information transmission method, where an execution body of the method may be a receiving device, and the method may include: first, receiving, by using a beam, a mapped bit sequence that is mapped to a time-frequency resource; The scrambled bit sequence is a bit sequence determined according to beam indication information, and the beam indication information is used to indicate a beam. Then, from the time-frequency resource, the scrambled bit sequence is obtained. Finally, the scrambled bit sequence is descrambled according to the beam indication information. In the technical solution, the terminal device considers the beam in the process of performing the descrambling operation, and the explanation of the related content, the specific implementation manner of the related steps, and the beneficial effects can refer to the descrambling method provided by the second aspect.

In a possible implementation manner, beam indication information may be received through RRC signaling, MAC signaling, or DCI.

In a possible implementation manner, the apparatus may include: a receiving unit, an acquiring unit, and a descrambling unit. The receiving unit is configured to receive the scrambled bit sequence mapped to the time-frequency resource by using the beam, where the scrambled bit sequence is a bit sequence determined according to the beam indication information, and the beam indication information is used to indicate Beam. And an obtaining unit, configured to obtain the scrambled bit sequence from the time-frequency resource. And a descrambling unit, configured to descramble the scrambled bit sequence according to the beam indication information.

In another possible implementation, the apparatus includes a processor, a memory, and a communication interface; the processor is configured to support the apparatus to perform a corresponding function in the method of the fourth aspect above. The communication interface is used to support communication between the device and other network elements. The memory is for coupling to a processor that holds the program instructions and data necessary for the device. The communication interface may specifically be a transceiver.

In order to improve the effect of randomization, and it is possible to reduce interference caused by the multi-beam base station to the neighboring area. Optionally, in order to solve the problem of self-interference between multiple beams, and the like. The application also provides the following technical solutions:

In a fifth aspect, the present application provides a cyclic shift method and apparatus.

In one design, the cyclic shifting method includes: cyclically shifting the first symbol group according to beam indication information to obtain a second symbol group; wherein the first symbol group is a symbol obtained by modulating original data bits group. In the technical solution, the base station considers the beam in the process of performing the cyclic shift operation, so that the symbol sequences obtained by cyclically shifting the PDCCHs transmitted on different beams may be different, so that PDCCHs transmitted on different beams may use different PDCCHs. The randomization technique can improve the effect of randomization and can reduce the interference caused by the multi-beam base station to the neighboring area. Optionally, since the technical solution can implement different scrambling sequences corresponding to any multiple beams, the scenario in which the base station uses the multiple beams to simultaneously transmit the PDCCH to the same terminal device may be used. Self-interference problem. Moreover, the problem that the base station uses multiple beams to sequentially transmit the PDCCH to the same terminal device may be solved, and the problem that the multiple beams are not fully utilized is caused.

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.

Correspondingly, the present application also provides a cyclic shifting device, which can implement the above cyclic shifting method. For example, the cyclic shifting device may be a chip (such as a baseband chip, or a communication chip, etc.) or a transmitting device (such as a base station, or a terminal, etc.). The above method can be implemented by software, hardware, or by executing corresponding software by hardware.

In a possible implementation, the cyclic shifting device comprises a processor and a memory. The processor is configured to support the apparatus to perform the corresponding functions in the cyclic shifting method described above. The memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device. Optionally, the cyclic shifting device may further comprise a communication interface for supporting communication between the device and other network elements. The communication interface can be a transceiver.

In another possible implementation, the cyclic shifting apparatus may include: a cyclic shifting unit, configured to cyclically shift the first symbol group according to the beam indication information to obtain a second symbol group; wherein, the first A symbol group is a symbol group obtained by modulating original data bits. In a possible implementation, the cyclic shift unit may be specifically configured to cyclically shift the first symbol group according to the beam indication information and the cell index to obtain a second symbol group. The cell index refers to a cell index of a cell where the terminal device is located.

In the solution provided by the fifth aspect, the cyclically shifting the first symbol group according to the beam indication information and the cell index to obtain the second symbol group may include: according to the formula

Obtaining a second symbol group; w(i) represents an ith element in the first symbol group,

Represents the ith element in the second symbol group,

Indicates a cell index, and offset represents a value associated with beam indication information.

In a sixth aspect, the present application provides a cyclic shift inverse operation method and apparatus.

In one design, the method may include: performing a cyclic shift inverse operation on the second symbol group according to the beam indication information to obtain a first symbol group. The second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information, and the first symbol group is a symbol group obtained by modulating the original data bits. The technical solution corresponds to the cyclic shift method provided by the fifth aspect, and therefore the beneficial effects that can be achieved can be referred to the above, and are not described herein again.

Correspondingly, the present application also provides a cyclic shift inverse operation device. The above cyclic shift inverse operation method can be implemented. For example, the cyclic shift inverse operation device may be a chip (such as a baseband chip, or a communication chip, etc.) or a receiving device (such as a base station, or a terminal, etc.). The above method can be implemented by software, hardware, or by executing corresponding software by hardware.

In a possible implementation, the cyclic shift inverse operation device includes a processor and a memory. The processor is configured to support the apparatus to perform the corresponding functions of the cyclic shift inverse operation method described above. The memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device. Optionally, the cyclic shift inverse operation device may further include a communication interface for supporting communication between the device and other network elements. The communication interface can be a transceiver.

In another possible implementation, the cyclic shift inverse operation unit may include: a cyclic shift inverse operation unit, configured to perform a cyclic shift inverse operation on the second symbol group according to the beam indication information, to obtain the first symbol group. The second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information, and the first symbol group is a symbol group obtained by modulating the original data bits.

In the solution provided by the sixth aspect, performing a cyclic shift inverse operation on the second symbol group according to the beam indication information, to obtain the first symbol group, may include: cyclically shifting the second symbol group according to the beam indication information and the cell index. Inverse operation, the first symbol group is obtained.

In a possible implementation manner, performing a cyclic shift inverse operation on the second symbol group according to the beam indication information and the cell index, to obtain the first symbol group, which may include: according to a formula

Obtaining a first symbol group; wherein

Representing the i-th element in the second symbol group, w(i) representing the i-th element in the first symbol group,

In a seventh aspect, the present application provides an information transmission method and apparatus, where an execution body of the method may be a transmitting device (for example, a base station), and the method may include the following steps: First, performing a first symbol group according to beam indication information Cycling shifts to obtain a second symbol group; wherein the first symbol group is a symbol group obtained by modulating original data bits. Second, the second symbol group is mapped to the time-frequency resource. Finally, the second symbol group mapped to the time-frequency resource is sent to the terminal device by using the beam indicated by the beam indication information. In the technical solution, the beam is considered in the process of performing the cyclic shift operation, and the explanation of the related content, the specific implementation manner of the related steps, and the beneficial effects can all refer to the above cyclic shift method.

In a possible implementation manner, the method may further include: sending, by using RRC signaling, MAC signaling, or DCI, beam indication information to the terminal device.

Correspondingly, an information transmission apparatus is further provided, which can implement the information transmission method described in the seventh aspect. For example, the device may be a transmitting device (such as a base station, or a terminal, etc.). The above method can be implemented by software, hardware, or by executing corresponding software by hardware.

In a possible implementation manner, the information transmission device includes a processor and a memory. The processor is configured to support the apparatus to perform the corresponding functions of the method of the seventh aspect described above. The memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device. Optionally, the information transmission device may further include a communication interface for supporting communication between the device and other network elements. The communication interface can be a transceiver.

In another possible implementation manner, the information transmission apparatus includes: a cyclic shift unit, a mapping unit, and a sending unit. The cyclic shift unit is configured to cyclically shift the first symbol group according to the beam indication information to obtain a second symbol group, where the first symbol group is a symbol group obtained by modulating the original data bits. a mapping unit, configured to map the second symbol group to the time-frequency resource. And a sending unit, configured to send, by using a beam indicated by the beam indication information, a second symbol group mapped to the time-frequency resource to the terminal device.

In an eighth aspect, the present application provides an information transmission method and apparatus, and an execution body of the method may be a receiving device (for example, a terminal), and the method may include the following steps: First, receiving a mapping sent by a beam to a time-frequency resource a second symbol group, wherein the second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information, where the first symbol group is a symbol group obtained by modulating the original data bits, and the beam group The indication information is used to indicate the beam. Obtain a second symbol group from the time-frequency resource. Performing a cyclic shift inverse operation on the second symbol group according to the beam indication information to obtain a first symbol group. In the technical solution, the terminal device considers the beam in the process of performing the cyclic shift inverse operation, and the explanation of the related content, the specific implementation manner of the related steps, and the beneficial effects can all refer to the cyclic shift inverse operation method.

Correspondingly, an information transmission apparatus is further provided, which can implement the information transmission method described in the eighth aspect. For example, the device can be a receiving device (such as a base station, or a terminal, etc.). The above method can be implemented by software, hardware, or by executing corresponding software by hardware.

In a possible implementation manner, the information transmission device includes a processor and a memory. The processor is configured to support the apparatus to perform the corresponding functions of the method of the above eighth aspect. The memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device. Optionally, the information transmission device may further include a communication interface for supporting communication between the device and other network elements. The communication interface can be a transceiver.

In another possible implementation manner, the information transmission apparatus includes a receiving unit, an acquiring unit, and a cyclic shift inverse operating unit. The receiving unit is configured to receive the second symbol group mapped to the time-frequency resource by using the beam, where the second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information, where The first symbol group is a symbol group obtained by modulating original data bits, and beam indication information is used to indicate a beam. An obtaining unit, configured to acquire a second symbol group from the time-frequency resource. And a cyclic shift inverse operation unit, configured to perform a cyclic shift inverse operation on the second symbol group according to the beam indication information, to obtain a first symbol group.

The optional receiving unit may be further configured to receive beam indication information by using RRC signaling, MAC signaling, or DCI.

In a ninth aspect, an information transmission apparatus is further provided, the apparatus comprising

a scrambling unit, 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;

And a sending unit, configured to send, by using the beam indicated by the beam indication information, the scrambled bit sequence mapped to the time-frequency resource to the terminal device.

In a possible design, the scrambling unit is specifically used to:

Obtain an initialization factor of the scrambling sequence according to the beam indication information;

Determining the scrambling sequence according to an initialization factor of the scrambling sequence;

The scrambling bit sequence is scrambled according to the scrambling sequence to obtain a scrambled bit sequence.

In another possible design, the scrambling unit is configured to: when acquiring an initialization factor of the scrambling sequence according to the beam indication information, specifically:

The initialization factor of the scrambling sequence is obtained according to the beam indication information, the cell index, and the slot number.

In another possible design, when the scrambling unit performs the initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number, it is specifically used to:

According to the formula

Obtain the initialization factor c _{init of the} scrambling sequence; where

Indicates rounding down, n _s is the slot number,

In another possible design, the sending unit is further configured to: send the beam indication information to the terminal device by using radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.

In a tenth aspect, an information transmission apparatus is further provided, the 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;

And a descrambling unit, configured to descramble the scrambled bit sequence according to the beam indication information.

In a possible design, the descrambling unit is specifically configured to:

Obtaining an initialization factor of the scrambling sequence according to the beam indication information;

Decoding the scrambled bit sequence according to the scrambling sequence.

In another possible design, the descrambling unit is configured to: when performing the initializing factor of the scrambling sequence according to the beam indication information, specifically:

An initialization factor of the scrambling sequence is obtained according to the beam indication information, the cell index, and the slot number.

In another possible design, the descrambling unit is configured to: when performing the initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number, specifically:

According to the formula

Obtain the initialization factor c _{init of the} scrambling sequence; where

Indicates rounding down, n _s is the slot number,

In another possible design, the receiving unit is further configured to: receive the beam indication information by using radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.

In an eleventh aspect, an information transmission apparatus is further provided, wherein the apparatus comprises:

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;

a mapping unit, configured to map the second symbol group to a time-frequency resource;

And a sending unit, configured to send, by using the beam indicated by the beam indication information, the second symbol group mapped to the time-frequency resource to the terminal device.

In a possible design, the cyclic shift unit is specifically configured to cyclically shift the first symbol group according to the beam indication information and the cell index to obtain a second symbol group.

In another possible design, the cyclic shift unit performs cyclic shifting on the first symbol group according to the beam indication information and the cell index to obtain a second symbol group, specifically for:

According to the formula

Obtaining a second symbol group; wherein w(i) represents an ith element in the first symbol group,

Representing the i-th element in the second symbol group,

Another possible design is characterized in that

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.

According to a twelfth aspect, an information transmission device is provided, 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;

And a cyclic shift inverse operation unit, configured to perform a cyclic shift inverse operation on the second symbol group according to the beam indication information, to obtain the first symbol group.

In a possible design, the cyclic shift inverse operation unit is specifically configured to perform a cyclic shift inverse operation on the second symbol group according to the beam indication information and a cell index, to obtain the first symbol group. .

In another possible design, the cyclic shift inverse operation unit performs a cyclic shift inverse operation on the second symbol group according to the beam indication information and the cell index, to obtain the first symbol. When used in groups, it is specifically used to:

According to the formula

Obtaining the first symbol group; wherein

Representing an i-th element in the second symbol group, w(i) representing an i-th element in the first symbol group,

The beam indication information may include at least one of the following information: the relative number of the beam, the logical number of the beam, the physical number of the beam, based on any of the possible implementations provided by any of the aspects or any of the aspects provided above. The port number, the quasi-co-located QCL information, the beam pair connection information, the terminal device group, the time domain symbol corresponding to the beam, and the number of the synchronization block SS block; wherein the terminal device corresponding to each beam is a terminal device group. For the manner of the correlation between the offset and the beam indication information, reference may be made to the specific implementation manner, and details are not described herein again.

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.

It can be understood that any of the devices or computer storage media or computer program provided above are used to perform the corresponding methods provided above, and therefore, the beneficial effects that can be achieved can be referred to the corresponding correspondence provided above. The beneficial effects of the method are not repeated here.

DRAWINGS

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;

2 is a schematic diagram of a process flow of a UE to a PDCCH in an LTE system according to the prior art;

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. 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.

detailed description

First of all, the related technologies and related terms involved in this application are briefly introduced to facilitate understanding:

1) Time domain resources for transmitting control channels

In the LTE system, channels are transmitted in units of radio frames. A radio frame includes 10 subframes, each of which has a length of 1 millisecond (ms), and each subframe includes two slots, each slot being 0.5 ms. The number of symbols included in each slot is related to the length of the cyclic prefix (CP) in the subframe. If the CP is a normal CP, each slot includes 7 symbols, and each subframe is composed of 14 symbols. For example, each subframe can be numbered by #0, #1, #2, #3,# 4, #5, #6, #7, #8, #9, #10, #11, #12, #13 symbol composition. If the CP is an extended CP, each slot includes 6 symbols, and each subframe is composed of 12 symbols. For example, each subframe can be numbered by #0, #1, #2, #3,# 4, #5, #6, #7, #8, #9, #10, #11 symbol composition. The "symbol" herein refers to an orthogonal frequency division multiplexing (OFDM) symbol.

In an LTE system, a PDCCH is typically transmitted on the first or first two or first three OFDM symbols of a subframe, which may be referred to as control symbols. For example, if the bandwidth of the LTE system is 1.4 megahertz (MHz), the PDCCH may be transmitted on the {2, 3, 4} OFDM symbols.

2) Time-frequency resources for transmitting control channels

In an LTE system, a resource element (RE) is a minimum time-frequency resource unit. The RE may be uniquely identified by an index pair (k, l), where k is the subcarrier index and l is the symbol index. Four consecutive REs (where the RE occupied by the reference signal are not counted) constitute one resource element group (REG). The REG can be identified by an index pair (k', l').

When the control channel is transmitted, the basic unit of the time-frequency resource carrying the control channel is a control channel element (CCE). A CCE contains 9 REGs. The PDCCH can be transmitted using different aggregation levels (AL). The aggregation level refers to how many CCEs the PDCCH carries. The aggregation level can be 1, 2, 4, 8. For example, the aggregation level is 2, which means that the PDCCH is carried on two CCEs.

3) Time-frequency resources that PDCCH can use

The time-frequency resource corresponding to the symbol in which the PDCCH is located (in the LTE system, the symbol generally refers to the first symbol) may also carry the following information: a reference signal (RS), and a physical control frame format indication channel ( Physical control formation indication channel (PCFICH), physical HARQ indication channel (PHICH); wherein HARQ is an abbreviation of hybrid automatic repeat request.

The PCFICH carries control format indication (CFI) information, and the CFI information is used to notify the user equipment (UE) of the number of symbols occupied by the control channel. The CFI information can be used by the UE to calculate the total number of resources occupied by the control channel. The CFI information can also be used by the UE to determine the starting position of the data channel in the time domain, i.e. from the first few symbols is the data channel. The PCFICH is a broadcast channel. The base station will send the PCFICH on the first symbol of a subframe. The configuration of the PCFICH itself is notified by other signaling.

If the UE sends uplink data, the UE may expect the base station to provide feedback on whether the uplink data is correctly received. The PHICH can be used to perform HARQ feedback of UE uplink data. PHICH is a multicast channel. The base station can transmit the PHICH on the first OFDM symbol of one subframe. The configuration of the PHICH itself is notified by a master information block (MIB) carried on a physical broadcast channel (PBCH).

The total number of REGs corresponding to the symbols occupied by the control channel is determined by the number of symbols and the bandwidth. The total REG number is subtracted from the time-frequency resource occupied by the PCFICH and the PHICH, that is, the time-frequency resource that the PDCCH can use.

4) Search space

In order to reduce the complexity of the UE, two search spaces are defined in the LTE system, which are a common search space and a UE-specific search space. In the common search space, the aggregation level of the PDCCH may be 4, 8. In the UE-specific search space, the PDCCH aggregation level may be 1, 2, 4, 8. In LTE, a PDCCH can only be composed of consecutive n CCEs, and only the i-th CCE can be used as a starting position, where i mod n=0.

5) Randomization

In mobile communication systems, interference between cells (or between base stations) is an important factor limiting performance. Among them, the interference between cells and the interference between base stations are no longer distinguished in the following. In particular, in an OFDM-based cellular communication system, such as LTE, 5G, etc., since the cell deployment is dense, the inter-cell interference strength is large, and the interference source is difficult to determine, thereby affecting the reception performance of the receiving end.

In order to solve this problem, in the LTE system, multiple interference randomization techniques are adopted between different cells to minimize interference white noise, so that better interference suppression can be achieved at the receiving end. Among them, interference randomization techniques include interleaving, scrambling, cyclic shifting, and the like. That is to say, randomization can be understood as: when the intensity of the interference is large and the interference source is difficult to determine, the statistical method is used to make the interference "white noise".

6) Symbol group

A symbol group refers to a collection of a plurality of modulation symbols. Wherein, the modulation symbol refers to a symbol obtained after modulation. The modulation mode is not limited in this application. For example, if the modulation mode is quadrature phase shift keying (QPSK) modulation, the modulation symbol refers to QPSK symbol; if the modulation mode is quadrature amplitude modulation (quadrature amplitude) Modulation, QAM), the modulation symbol refers to the QAM symbol.

It will be understood by those skilled in the art that, according to the description above, it should be clearly understood that the "symbol" in this application refers to an OFDM symbol or a modulation symbol. For example, "symbol" in "symbol sequence" refers to a modulation symbol, and "symbol" in a "symbol group" also refers to a modulation symbol. The "symbol" in "occupied symbol" refers to an OFDM symbol.

7) Beam and beam pair link

A beam is a communication resource. The beam can be a wide beam, or a narrow beam, or other type of beam. The beamforming technique can be beamforming techniques or other technical means. The beamforming technique may be specifically a digital beamforming technique, an analog beamforming technique, or a hybrid beamforming technique. Different beams can be considered as different resources. The same information or different information can be transmitted through different beams. Alternatively, multiple beams having the same or similar communication characteristics can be considered as one beam. One or more antenna ports may be included in one beam for transmitting data channels, control channels, sounding signals, and the like. For example, a transmit beam may refer to a distribution of signal strengths that are formed in different directions of space after the signal is transmitted through the antenna. The receive beam may refer to a signal strength distribution of wireless signals received from the antenna in different directions in space. It can be understood that one or more antenna ports forming one beam can also be regarded as one antenna port set.

The beam pair is built on the concept of the beam. A beam pair typically includes a transmit beam at the transmitter and a receive beam at the receiver. It should be noted that the “beam” in the following refers to the transmit beam of the base station, and the present invention does not limit the receive beam of the UE.

8) Other terms

The term "plurality" as used herein refers to two or more.

The terms "first", "second", etc. are used herein to distinguish different objects and are not intended to limit the order. For example, the first symbol group and the second symbol group are merely for distinguishing different symbol groups, and their order is not limited.

The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship; in the formula, the character "/" indicates that the contextual object is a "divide" relationship.

The following describes the processing flow of the PDCCH by the base station and the UE in the LTE system:

As shown in FIG. 1 , it is a schematic diagram of a process flow of a PDCCH by a base station in an LTE system, and specifically includes the following steps S101 to S113:

S101: The base station determines original data bits. In this embodiment, the base station sends the PDCCH as an example in which the base station sends downlink control information (DCI) to the UE in the kth subframe. In this case, the original data bits are the DCI.

S102: 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 . Where 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. In the LTE, the coding of the control channel may be a tail-biting convolutional coding (TBCC), and the encoding of the control channel in the 5G new radio (NR) may be a Polar code or the like. This application does not limit this.

S104: 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.

The total number of CCEs in the system is

among them,

Indicates rounding down. N _REG represents the total number of _REGs that the PDCCH can transmit, that is, the total number of REGs other than the REG occupied by the PHICH and the PCFICH. As can be seen from the above description, one PDCCH can be aggregated and transmitted in {1, 2, 4, 8} CCEs. 72 bits of information can be mapped on each CCE.

S106: 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.

For example, assume that the bit sequence length of the i th PDCCH is

And represent the bit sequence as

Then, the bit sequence obtained after the base station performs resource multiplexing on the n _PDCCH PDCCHs may be:

For the sake of brevity of expression, this sequence is defined in this application as b(i), and the total length of b(i) is

For example, CCEn, that is, the nth CCE, the mapped bit sequence may be: b(72*n), b(72*n+1), ..., b(72*n+71). If there is a CCE that is not occupied, add <NIL>.

S107: 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. In the LTE protocol, scrambling is performed according to the following formula:

among them,

Representing the bit sequence obtained after scrambling, b(i) represents the bit sequence to be scrambled, that is, b(i) described in the above example of S106, and c(i) represents the scrambling sequence. The scrambling sequence c(i) may be a sequence associated with a cell ID (cell ID) and a slot number n _s . The cell ID refers to the cell ID of the cell where the UE is located, and n _s refers to the code of the slot used when transmitting the PDCCH. Optionally, the initialization factor c _init of the scrambling sequence c(i) is a value associated with the cell ID and the slot number n _s . specific:

S108: The base station modulates the bit sequence obtained after the scrambling.

In the LTE system, the modulation of the PDCCH is generally performed by using a QPSK modulation scheme, that is, two bits are modulated into one QPSK symbol, and the specific modulation method is not limited in this application. Obtained in S107

After modulation, a symbol sequence d(m) is obtained.

S109: The base station performs layer mapping and precoding on the symbol sequence obtained after the modulation.

Among them, precoding is an optional step, and for the sake of simplicity of the description, the specific examples below are described on the basis of not considering this step. This application does not limit the specific implementation of S109. Taking an antenna port as an example, the symbol sequence obtained by performing layer mapping and precoding on the symbol sequence d(m) is marked as y(m).

S110: The base station interleaves and cyclically shifts the symbol sequence obtained after precoding.

In the LTE system, the interleaving and cyclic shifting operations are performed in units of quadruplets. Taking an antenna port as an example, a quadruple group z(i)=<y(4i), y(4i+1), y(4i+2), y(4i+3)>. The quadruple sequence can be expressed as z(0), z(1), z(2), z(3).... Interleaving and cyclic shifting are performed on a quadruple sequence. Assuming that the base station interleaves the quadruplet sequence, the information obtained by the element z(i) in the quadruplet sequence is marked as w(i), then the base station pairs the quadruplet sequence z(0), z( 1), z(2), z(3)... After performing the interleaving operation, the obtained information can be marked as w(0), w(1), w(2), w(3)...

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:

Wherein, M _quad represents the number of quadruplets, M _quad represent QPSK symbol number is divided by 4, _{_{i.e.: M quad = M symb / 4}} .

S111: 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)...

S112: The base station performs inverse fast fourier transform (IFFT) on the information mapped to the time-frequency resource.

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.

As shown in FIG. 2 , it is a schematic diagram of a process flow of a UE to a PDCCH in an LTE system, where the UE receives the PDCCH in the kth subframe (ie, subframe k), and the modulation mode is a QPSK modulation mode. The method may include the following steps S201 to S209:

S201: The UE listens to the control channel in the subframe k. The signal monitored by the UE (that is, the signal received by the UE) is a wireless signal carried by the OFDM waveform, that is, an OFDM time domain signal.

S202: The UE performs fast Fourier transform (FFT) on the monitored signal.

After the UE performs the FFT, 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.

After the UE performs demodulation, the symbol sequence can be changed to a bit sequence. The process of demodulation corresponds to S108 and can be considered as the inverse of S108.

S205: 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. For example, the mth candidate PDCCH obtained by blind detection may be composed of the following CCEs:

Where L is the aggregation level and can be {1, 2, 4, 8}. N _CCE,k represents the number of CCEs used in the subframe k for outgoing control channels. i=0,...,L-1. m=0,...,M ^(L) -1. M ^(L) indicates the number of candidate PDCCHs when the aggregation level is L, and LTE specifies a search space dedicated to the UE. When L={1, 2, 4, 8}, M ^(L) is {6, 6, 2, respectively. 2}, and for public search space, when L={4,8}, M ^(L) is {4,2}.

For the common search space, m'=m, Y _k =0.

For the UE-specific search space, m'=m+M ^(L) ·n _CI , Y _k =(A·Y _k-1 )modD, Y _-1 =n _RNTI ≠0, A=39827, D=65537,

The n _RNTI represents a UE ID and is used to identify a UE. n _CI is the carrier indication and is 0 in the case of a single carrier. n _s is a radio frame slot number.

S207: 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.

According to the discussion of the 5G NR, in order to ensure the robustness of the control channel, multiple beams can be used to transmit the PDCCH to one UE. Multiple beams may be used for communication between the UE and the base station simultaneously. Among them, robustness can be understood as stability or robustness and the like.

However, according to the above description, the technical solutions provided above have at least the following technical problems:

First, LTE itself does not consider the beam-related information processing flow.

Second, in a scenario where the base station uses multiple beams to transmit PDCCHs to the same UE, if the above processing flow is still used, multiple beams of the same base station use a similar randomization method when transmitting PDCCHs to the same UE. . Specifically, multiple beams of the same base station will transmit the same PDCCH at the same frequency position, using the same interleaving method, using the same scrambling sequence and cyclic shift mode. This will reduce the effect of randomization and will cause the interference strength of the multi-beam base station to the neighboring area to become large. Wherein, the interference intensity is proportional to the number of beams. A multi-beam base station refers to a base station that communicates with the same UE using multiple beams.

Third, in a scenario in which the base station uses multiple beams to transmit a PDCCH to the same UE, if the foregoing process flow is still used, and the base station simultaneously uses multiple beams to transmit the PDCCH to the same UE, the information sent by the multiple beams is the same. If the correlation between the beams is not low enough, the multiple beams will generate self-interference, which will reduce the channel capacity.

Fourth, in a scenario in which the base station uses multiple beams to transmit PDCCHs to the same UE, if the above process is still used, the base station sequentially uses multiple beams to transmit PDCCHs to the same UE, for example, one symbol is transmitted using one beam. . At this time, for the UE, the frequency domain resources corresponding to the two symbols are identical. In this way, only the diversity in the airspace brought by the multiple beams is obtained, and the conditions of the multiple beams are not fully utilized.

Based on this, the present application provides an information transmission method and apparatus. Specifically, the effect of the beam on the information processing process is considered, thereby improving the randomization effect and reducing the interference strength of the multi-beam base station to the neighboring area. This process takes full advantage of the multi-beam condition. Moreover, optionally, in a scenario in which a base station simultaneously uses multiple beams to transmit a PDCCH to the same UE, self-interference between the multiple beams may be reduced, thereby enhancing channel capacity.

The technical solutions in the present application will be described in detail below in conjunction with the drawings in the present application.

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. Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks, or terminal devices in future evolved PLMN networks, and the like. In this application, it is called a terminal device or a terminal, or a UE.

It should be noted that, in this document, the network device 100 is a base station, and the terminal device 200 is a UE as an example. For downlink transmission, the sending device may be a base station, and the receiving device is a terminal. For uplink transmission, the sending device is a terminal, and the receiving device is a base station.

Taking the network device 100 as a base station as an example, the general hardware architecture of the base station will be described. As shown in FIG. 4, the base station may include an indoor baseband unit (BBU) and a remote radio unit (RRU), and the RRU and the antenna feeder system (ie, an antenna) are connected. The BBU and the RRU may be as needed. Take it apart.

Taking the terminal device 200 as a mobile phone as an example, the general hardware architecture of the mobile phone will be described. As shown in FIG. 5, the mobile phone may include: a radio frequency (RF) circuit 110, a memory 120, other input devices 130, a display screen 140, a sensor 150, an audio circuit 160, an I/O subsystem 170, a processor 180, And components such as power supply 190. It will be understood by those skilled in the art that the structure of the mobile phone shown in FIG. 5 does not constitute a limitation on the mobile phone, and may include more or less components than those illustrated, or combine some components, or split some components, or Different parts are arranged. Those skilled in the art can understand that the display screen 140 belongs to a user interface (UI), and the display screen 140 can include a display panel 141 and a touch panel 142. And the handset can include more or fewer components than shown. Although not shown, the mobile phone may also include functional modules or devices such as a camera and a Bluetooth module, and details are not described herein.

Further, the processor 180 is connected to the RF circuit 110, the memory 120, the audio circuit 160, the I/O subsystem 170, and the power supply 190, respectively. The I/O subsystem 170 is connected to other input devices 130, display 140, and sensor 150, respectively. The RF circuit 110 can be used for receiving and transmitting signals during and after receiving or transmitting information, and in particular, receiving downlink information of the base station and processing it to the processor 180. The memory 120 can be used to store software programs as well as modules. The processor 180 executes various functional applications and data processing of the mobile phone by running software programs and modules stored in the memory 120. Other input devices 130 can be used to receive input numeric or character information, as well as to generate key signal inputs related to user settings and function controls of the handset. The display screen 140 can be used to display information input by the user or information provided to the user as well as various menus of the mobile phone, and can also accept user input. Sensor 150 can be a light sensor, a motion sensor, or other sensor. The audio circuit 160 can provide an audio interface between the user and the handset. The I/O subsystem 170 is used to control external devices for input and output, and the external devices may include other device input controllers, sensor controllers, and display controllers. The processor 180 is the control center of the handset 200, which connects various portions of the entire handset using various interfaces and lines, by running or executing software programs and/or modules stored in the memory 120, and recalling data stored in the memory 120, The various functions and processing data of the mobile phone 200 are executed to perform overall monitoring of the mobile phone. A power source 190 (such as a battery) is used to power the various components described above. Preferably, the power source can be logically coupled to the processor 180 through a power management system to manage functions such as charging, discharging, and power consumption through the power management system.

It should be noted that the technical solution provided by the present application is particularly applicable to a 5G NR system. According to the discussion of the 5G NR, in order to ensure the robustness of the control channel, multiple beams can be used to transmit the PDCCH to one UE. The technical solution provided by the present application is particularly applicable to a scenario based on multiple beams. There are two typical scenarios for transmitting one PDCCH using multiple beams.

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.

It can be understood that the foregoing FIG. 6 and FIG. 7 are only examples, which do not constitute a limitation of the scenario to which the technical solution provided by the present application is applicable. For example, a base station can transmit a PDCCH on three or more control symbols.

For convenience of description, the information transmission method performed by the base station and the UE in the embodiment of the present application is shown and described in detail below.

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.

S307: 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.

As shown in FIG. 9, 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.

The specific implementation process of T2 to T3 is not limited in the embodiment of the present application.

It can be understood that, in specific implementation, the base station and the UE may pre-agreed the correlation between the offset and the beam indication information. Specific examples thereof can be referred to below.

It can be understood that, as shown in S307, the scrambling operation provided by the present application is related to beam indication information, each beam indication information is used to indicate one beam, and different beam indication information indicates different beams. Each beam can be indicated by one or more beam indication information, and different beams can be indicated by different beam indication information. The specific implementation manner of the beam indication information is not limited in this application. Several alternative methods are listed below:

Mode 1: The beam indication information is the relative number of the beams.

It is assumed that the relative number of beams used by the base station to transmit the PDCCH to the UE is beam _idx = {0, 1, ...}, where each number represents a physical beam, as shown in FIG. 9a, then the offset is opposite to the beam. One possible way to correlate numbers is: offset=beam _idx . For example, as shown in FIG. 9a, the base station uses two beams to transmit a PDCCH to the UE. The relative numbers of the two beams may be 0 and 1, respectively, and the offset sequence corresponding to the beam 0 may be obtained by using offset=0, and the offset is used. =1 Acquire the scrambling sequence corresponding to beam 1.

Mode 2: The beam indication information is the logical number of the beam.

Suppose the logical number of the transmit beam of the base station is beam _idx = {0, 1, ...}, where each number represents a physical beam, as shown in Figure 9b, then one possibility of the offset and the logical number of the beam The relevant way is: offset=beam _idx . For example, as shown in FIG. 9b, the number of the transmit beams of the base station is 0, 1, 2, and 3 respectively. If the base station uses the beam 1 and the beam 2 to transmit the PDCCH to the UE, the offset 1 corresponding to the beam 1 can be acquired using offset=1. Sequence, using offset=2 to obtain the scrambling sequence indicator beam 2 corresponding to beam 2.

Mode 3: The beam indication information is the physical number of the beam.

Assuming that the physical number of the transmit beam of the base station is beam _idx = {0, 1, ...}, where each number represents a physical beam, then one possible correlation between the offset and the physical number of the beam is: offset =beam _idx mod N. Where N is a predefined or configurable integer. It is assumed that the base station uses a total of 8 beams to serve the entire cell, as shown in Figure 9c. Based on FIG. 9c, if N=2, the base station transmits the PDCCH to the UE using the beam 5 and the beam 6, the offset sequence corresponding to the beam 5 can be acquired using offset=1, and the scrambling sequence corresponding to the beam 6 can be acquired using offset=0.

Mode 4: 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. Optionally, the port number corresponding to one beam can be formed into a port group, and each port group is assigned a port group ID. Based on this, assuming that beam _idx = {0, 1, ...}, where each number represents a port group, then one possible correlation between offset and port number is: offset=beam _idx mod N. Where N is a predefined or configurable integer. For example, if N=2, the base station transmits the PDCCH to the UE using the beam 2 and the beam 3, then the scrambling sequence corresponding to the beam 2 can be acquired using offset=0, and the scrambling sequence corresponding to the beam 3 can be acquired using offset=1.

Mode 5: 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. For multiple resources with a parity relationship, the same or similar communication configuration may be adopted. For example, if two antenna ports have a parity relationship, the large-scale characteristics of the channel in which one port transmits one symbol can be inferred from the large-scale characteristics of the channel through which one symbol transmits one symbol. Among them, large-scale characteristics may include: delay spread, average delay, Doppler spread, Doppler shift, average gain, terminal equipment receive beam number, transmit/receive channel correlation, receive angle of arrival, receiver antenna space Relevance and so on.

Based on this, the resources of other signals transmitted on the beam transmitting the PDCCH can be used to indicate the beam. Alternatively, the signal may be a reference signal, such as a CSI-RS. The “resources” herein may include, but are not limited to, at least one of the following information: time-frequency resources, number of ports, periods, offsets, and the like.

It can be understood that if the base station sends a PDCCH to the UE using a certain beam, the base station transmits the CSI-RS using this beam. This is because the general base station needs to first send a CSI-RS to the UE to perform channel measurement; then, the channel measurement result is used to send the PDCCH to the UE. Based on this, the base station can know which beam or beams to use to transmit the PDCCH by the base station, as long as the base station notifies the UE of the port number and/or the resource number used by the CSI-RS.

As shown in FIG. 9d, it is a correspondence between CSI-RS resources and beams.

Optionally, the CSI-RS resource number may be a resource ID, or a resource ID+port ID. In this case, assuming that beam _idx = {0, 1, ...}, where each number represents a CSI-RS resource, then one possible correlation between offset and CSI-RS resources is: offset=beam _Idx mod N, where N is a predefined or configurable integer.

For example, as shown in FIG. 9d, if the CSI-RS resource numbers used by the base station to transmit the CSI-RS to the UE are #0 and #1, and the PDCCH is transmitted to the UE using the beam transmitting the CSI-RS, and N= 2, the offset sequence of the beam corresponding to the CSI-RS resource number #0 can be obtained by using offset=0, and the scrambling sequence of the beam corresponding to the CSI-RS resource number #1 can be obtained by using offset=1.

Mode 6: The beam indication information is beam pair link (BPL) information.

The BPL information may be a BPL number or the like. Suppose beam _idx = {0, 1, ...}, where each number represents a BPL, as shown in Figure 9e. Then, one possible correlation between offset and BPL information is offset=beam _idx . For example, as shown in FIG. 9e, the base station uses the beam pair 0 and the beam pair 1 to transmit the PDCCH to the UE. Then, offset=0 can be used to acquire the scrambling sequence corresponding to beam 0, and offset=1 is used to obtain the scrambling sequence corresponding to beam 1. .

Mode 7: The beam indication information is a UE group. The UEs in one beam coverage form one UE group, each UE group may include one or multiple UEs, and one UE may belong to one or multiple UE groups.

As shown in FIG. 9f, the UE group 1 corresponding to the beam 1 includes the UE1, the UE group 2 corresponding to the beam 2 includes the UE1 and the UE2, and the UE group 3 corresponding to the beam 3 includes the UE2. In this case, assuming that beam _idx = {0, 1, ...}, where each number refers to one UE group, then one possible correlation between offset and UE group is: offset=beam _idx . For example, as shown in FIG. 9f, the base station may acquire the scrambling sequence corresponding to beam 1 using offset=1, acquire the scrambling sequence corresponding to beam 2 using offset=2, and acquire the scrambling sequence corresponding to beam 3 using offset=3.

Mode 8: 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.

Suppose beam _idx = {0, 1, ...}, where each number refers to a symbol time. Then, one possible way to associate offset with time domain symbols is:

Where N is a predefined or configurable integer, such as N=9.

It is to be understood that the above-mentioned methods are mostly described by taking the beam indication information as a single information as an example. In specific implementation, the beam indication information may also be a combination of the at least two pieces of information, for example, in the foregoing manner 5 An example of this. Of course, it is not limited to the above information. This application is not listed one by one.

It should be noted that, in the technical solution provided by the present application, the base station considers the beam when performing the scrambling operation, but the scrambling sequence corresponding to different beams is not limited in the present application. That is to say, the scrambling sequences corresponding to different beams may be the same or different.

It can be understood that the beam of communication between the base station and the same UE may change with the movement of the UE. The present application does not limit the change rule of the used beam. In this case, therefore, the beam indication information is not a fixed value. Based on this, the base station can notify the UE of the beam indication information by signaling. The order of execution of the steps in FIG. 8 is not limited in the embodiment of the present application. Alternatively, the step may be performed before S301. It should be noted that the signaling used to send the beam indication information may be a newly designed signaling, or may reuse one signaling in the prior art.

Optionally, the base station may send the beam indication information to the UE by using radio resource control (RRC) signaling, medium access control (MAC) signaling, or DCI. For example, the base station sends the beam indication information to the UE through RRC signaling or MAC signaling, which can be applied to a scenario where the beam change is slow. The base station sends the beam indication information to the UE through the DCI, which can be applied to a scenario in which the beam change is fast.

S308 to S310: Reference may be made to the methods of S108 to S110 in the prior art, and other methods may be used. The present invention is not limited thereto.

S311: 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 technical solution provided by the embodiment of the present application is particularly applicable to a scenario based on multiple beam transmissions. In a scenario where multiple beams are transmitted, the mapping rule may be a pre-frequency domain post-time domain, thus avoiding occupying one beam in one beam. In a symbolic scenario, the UE in the beam direction cannot receive information transmitted on different beams due to the mapping rules in the frequency domain after the first time domain. It can be understood that if a beam occupies multiple symbols, the information transmitted by using the beam may be mapped according to the mapping rule of the time domain after the frequency domain, or may be mapped according to the mapping rule of the time domain after the frequency domain.

Taking an antenna port as an example, resource mapping refers to

Maps to the REG(k',l') corresponding to the port. Among them, about

For a description, refer to S111 above.

If multiple beams occupy one symbol, as shown in FIG. 6, the base station may perform resource mapping on the symbol sequences corresponding to the two beams:

Map to REG(0,0), will

Map to REG(1,0), will

Map to REG(2,0), will

Map to REG(3,0)....

If multiple beams occupy multiple symbols, as shown in Figure 7, then the base station will be at symbol 0.

Map to REG(0,0), will

Map to REG(1,0), will

Map to REG(2,0), will

Map to REG(3,0).... On symbol 1, will

Map to REG(0,1), will

Map to REG(1,1), will

Map to REG(2,1), will

Map to REG(3,1)....

S312: Step S112 may be referred to, and other methods may be used, which are not limited by the present invention.

S313: The base station sends an OFDM time domain signal to the UE by using a beam indicated by the beam indication information.

It should be noted that some of the steps S301 to S313 may be optional steps. In addition, the order of execution of any two steps in S301 to S313 is not limited in the embodiment of the present application.

The above S301 to S313 are examples of the processing procedure of the PDCCH transmitted by the base station on one beam. In the multi-beam scenario, the base station may perform the above process multiple times.

In this embodiment, the base station considers the beam in the process of performing the scrambling operation, so that the PDCCHs transmitted on different beams can be scrambled using different scrambling sequences, so that different beams can use different randomization techniques, thereby The effect of randomization can be improved, and the interference caused by the multi-beam base station to the neighboring area can be reduced.

FIG. 10 is a schematic flowchart diagram of an information transmission method provided by an embodiment of the present application. It should be noted that FIG. 10 is an example in which the UE processes the PDCCH transmitted on one beam as an example. The method may include the following steps S401 to S409:

S401: The UE monitors the PDCCH transmitted by the beam in the subframe k. The signal monitored by the UE (ie, the signal received by the UE) is a wireless signal carried by the OFDM waveform, that is, an OFDM time domain signal.

S402-S404: Steps S202-S204 may be referred to, and other methods may be used. The present invention does not limit this.

S405: The UE performs descrambling on the demodulated bit sequence according to the beam indication information, where the beam indication information is used to indicate the beam in S401.

As shown in FIG. 11, S405 may include the following steps M1 to M3:

M1: The UE acquires an initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number.

M2: 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. In addition, the related description of the beam indication information can also refer to the above.

In addition, the method may further include: the UE receiving the beam indication information by using RRC signaling, MAC signaling, or DCI. The UE specifically uses which signaling receiving beam indication information is related to which signaling the base station uses to transmit beam indication information. For example, if the base station transmits beam indication information using RRC signaling, the UE receives beam indication information using RRC signaling. Other examples are not listed one by one.

S406 to S409: Reference may be made to S206 to S209, and other methods may be used. The present invention is not limited thereto.

It should be noted that some of the steps S401 to S409 may be optional steps. In addition, the order of execution of any two steps in S401 to S409 is not limited in the embodiment of the present application.

It can be understood that if a plurality of beams occupy one symbol, as shown in FIG. 6, the processing flow of the PDCCH corresponding to each beam may be all the above S401 to S409.

If multiple beams occupy multiple symbols, as shown in FIG. 7, if the PDCCH decoded by the UE on the symbol occupied by the first beam is correctly decoded, the symbols occupied by the subsequent beams may not be monitored. If the PDCCH decoded on the symbol occupied by the first beam is incorrectly decoded, S401 to S409 are performed again, wherein in S401, the PDCCH is monitored on the second symbol; and so on, until a certain monitoring is obtained. The PDCCH is decoded correctly, or all PDCCHs are monitored and both are decoded incorrectly.

In this embodiment, the UE considers the beam in the process of performing the descrambling operation, and the process of the descrambling corresponds to the scrambling process in the embodiment shown in FIG. 8. Therefore, the explanation and related content of the related content are For the beneficial effects that can be achieved, reference may be made to the corresponding parts in the embodiment shown in FIG. 8, and details are not described herein again.

It is to be understood that, in the foregoing, the embodiment of the present application is not limited to the embodiment of the present application, for example, in the process of transmitting a PDCCH, in which a scrambling operation is performed or a method of performing descrambling is considered. The technical solution provided by the embodiment of the present application may also be applicable to a scenario for transmitting any of the following channels:

1) Physical downlink shared channel (PDSCH).

In this case, the initialization factor of the scrambling sequence

Where n _RNTI represents the UE ID, which is used to identify a UE, and q represents q codewords.

2) Physical multicast channel (PMCH).

In this case, the initialization factor of the scrambling sequence

among them,

Indicates a multicast broadcast single frequency network (MBSFN) area identifier.

3) PBCH.

In this case, the initialization factor of the scrambling sequence

4) PCFICH.

In this case, the initialization factor of the scrambling sequence

5) Enhanced physical downlink control channel (EPDCCH).

In this case, the initialization factor of the scrambling sequence

m represents the number of EPDCCH sets (or EPDCCH clusters),

Represents a high-level configuration ID associated with the EPDCCH setting.

6) Physical uplink shared channel (PUSCH).

In this case, the initialization factor of the scrambling sequence

7) Physical uplink control channel (PUCCH).

In this case, the initialization factor of the scrambling sequence

It is to be understood that the method for transmitting the above-mentioned extended channels, and the scrambling operation and the like may be determined according to the prior art and the method for transmitting the PDCCH provided herein, and are not described herein.

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.

S510: The base station performs interleaving and cyclic shifting on the pre-coded symbol sequence according to the beam indication information.

Specifically, the base station interleaves the symbol sequence obtained after precoding, and then cyclically shifts the symbol sequence obtained after the interleaving according to the beam indication information. The step of performing interleaving by the base station is an optional step.

As shown in FIG. 13, the base station performs cyclic shift according to the beam indication information, and may include the following step N1:

N1: 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

Indicates a cell index, and offset indicates beam indication information.

It can be understood that if the base station does not perform the step of interleaving, the first symbol group is a sequence of symbols output after precoding. If the base station performs the step of interleaving, the first symbol group is a sequence of symbols output after interleaving. The type and number of modulation symbols included in the first symbol group are related to the modulation scheme.

For example, if the base station performs a cyclic shift operation in units of quadruplets, taking one antenna port as an example, a quadruple group z(i)=<y(4i), y(4i+1), y(4i +2), y(4i+3)>. The quadruple sequence can be expressed as z(0), z(1), z(2), z(3).... Assuming that the base station interleaves the quadruplet sequence, the information obtained by the element z(i) in the quadruplet sequence is marked as w(i), then the element in the first symbol group may be w(i) The first symbol group may be: w(0), w(1), w(2), w(3).... The elements in the second symbol group can be

Optional, base station according to the formula

Where M _quad represents the number of quadruplets.

It can be understood that the example is described by taking the element in the first symbol group as a quadruple group as an example. The present application is not limited thereto, and may be, for example, an N-group, where N is an arbitrary integer greater than or equal to 1.

It can be understood that the specific implementation of the beam indication information, and the specific implementation manner of the base station transmitting the beam indication information to the UE, etc., may be referred to above, and details are not described herein again.

It should be noted that, in the technical solution provided by the present application, the base station considers the beam when performing the cyclic shift operation, but the symbol sequence obtained after the cyclic shift of the different beams is not limited in the present application. That is to say, the sequence of symbols obtained after cyclic shift corresponding to different beams may be the same or different.

S511: 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.

S513: The base station sends the information mapped to the time-frequency resource to the UE by using the beam indicated by the beam indication information.

It should be noted that some of the steps S501 to S513 may be optional steps. In addition, the execution sequence of any two of S501 to S513 is not limited in the embodiment of the present application.

It can be understood that if the PDCCH occupies only one symbol, as shown in FIG. 6, the processing flow of the PDCCH corresponding to each beam by the base station may be: S501 to S511 are performed independently for the two beams. After performing S511, the PDCCHs corresponding to the two beams are all mapped to time-frequency resources corresponding to the same symbol. Then, S512 is executed, that is, the information mapped to the time-frequency resource corresponding to the symbol is subjected to IFFT. Finally, S513 is performed, that is, an OFDM time domain signal is transmitted to the UE through the two beams on the symbol.

If the PDCCH occupies two symbols, as shown in FIG. 7, the processing flow of the PDCCH corresponding to each beam by the base station may be: S501 to S315 are performed independently for the two beams.

For a scenario in which the PDCCH occupies three or more symbols, the processing procedure of the PDCCH corresponding to each beam by the base station may refer to a processing procedure of the PDCCH corresponding to each beam by the base station in the scenario where the PDCCH occupies two symbols. I will not repeat them here.

In this embodiment, the base station considers the beam in the process of performing the cyclic shift operation, so that the symbol sequences obtained by cyclically shifting the PDCCHs transmitted on different beams may be different, so that PDCCHs transmitted on different beams may use different PDCCHs. The randomization technique can improve the effect of randomization and can reduce the interference caused by the multi-beam base station to the neighboring area. Optionally, since the technical solution can implement different scrambling sequences corresponding to any multiple beams, the scenario in which the base station uses the multiple beams to simultaneously send the PDCCH to the same UE may be used. The problem of interference. Moreover, the problem that the base station uses multiple beams to sequentially transmit PDCCHs to the same UE may be solved, and the problem that the multiple beams are not fully utilized is caused.

It can be understood that, in actual implementation, S507 can be replaced with S307. That is, the base station considers the beam in both the scrambling operation and the cyclic shift operation. In this way, the technical problems brought by the technical solutions provided in the LTE system can be better solved.

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.

S603: The UE performs deinterleaving and cyclic shift inverse operations on the symbol sequence obtained after the FFT according to the beam indication information.

Specifically, the UE deinterleaves the symbol sequence obtained after the FFT, and then performs a cyclic shift inverse operation on the symbol sequence obtained after the deinterleaving according to the beam indication information. The step of performing deinterleaving by the UE is an optional step, and whether the step is performed is related to a step of performing interleaving on the base station side. For example, if the base station performs the interleaving step, the UE needs to perform the step of deinterleaving.

As shown in FIG. 15, the UE performs a cyclic shift inverse operation according to the beam indication information, and may include the following step W1:

W1: 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. In addition, the related description of the beam indication information can also refer to the above. Example, UE according to the formula

Obtaining a second symbol group; wherein

Representing the ith symbol in the second symbol group, w(i) representing the ith symbol in the first symbol group,

Indicates a cell index, and offset indicates beam indication information. For the specific implementation process, reference may be made to the above step N1.

It can be understood that if the UE does not perform the step of deinterleaving, the second symbol group is a symbol sequence output after the FFT. If the UE performs the step of deinterleaving, the second symbol group is a sequence of symbols output after deinterleaving.

In addition, the method may further include: the UE receiving the beam indication information by using RRC signaling, MAC signaling, or DCI. Specifically, which signaling receiving beam indication information is related to which signaling information used by the base station to transmit beam indication information. For example, if the base station transmits beam indication information using RRC signaling, the UE receives beam indication information using RRC signaling. Other examples are not listed one by one.

S604 to S609: S204 to S209 may be referred to, and other methods may be used. The present invention does not limit this.

It should be noted that some of the steps S601 to S609 may be optional steps. In addition, the execution sequence of any two steps S601 to S609 is not limited in the embodiment of the present application.

In this embodiment, the UE considers a beam in the process of performing a cyclic shift inverse operation, and the process of the cyclic shift inverse operation corresponds to the cyclic shift process in the embodiment shown in FIG. 12, and therefore, For the beneficial effects that can be achieved, reference may be made to the embodiment shown in FIG. 12, and details are not described herein again.

It can be understood that if S507 is replaced with S307, S605 in this embodiment may be replaced with S405. The beneficial effects that can be achieved can be referred to the above, and will not be repeated here.

It can be understood that FIG. 13 and FIG. 14 are described as an example of "considering a beam when performing a cyclic shift operation or a cyclic shift inverse operation in the process of transmitting a PDCCH". In actual implementation, this embodiment of the present application For example, when the PUCCH format 3 is transmitted, the technical solution provided by the embodiment of the present application may also be applied to a scenario in which a PUCCH is transmitted.

among them,

a sequence of symbols representing the cyclic shift to be performed,

Represents the sequence of symbols obtained after cyclic shift, and n _s represents the slot number.

Indicates the number of subcarriers of a resource block (RB).

The solution provided by the embodiment of the present application is mainly introduced from the perspective of interaction between the network elements. It can be understood that each network element, such as a network device (such as a base station) or a terminal device (such as a UE). In order to implement the above functions, it includes hardware structures and/or software modules corresponding to the execution of the respective functions. Those skilled in the art will readily appreciate that the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

The embodiment of the present application may perform the division of the function module on the network device or the terminal device according to the foregoing method example. For example, each function module may be divided according to each function, or two or more functions may be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner. The following is an example of dividing each functional module by using corresponding functions:

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. Wherein, the cyclic shift unit 1801 can be used to perform S510 in FIG. 12, N1 in FIG. 13, and/or other processes for supporting the techniques described herein. Mapping unit 1802 can be used to perform S511 in FIG. 12, and/or other processes for supporting the techniques described herein. Transmitting unit 1803 can be used to perform S513 in FIG. 12, and/or other processes for supporting the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.

FIG. 19 shows a schematic structural diagram of an information transmission device 190. The information transmission device 190 may be the terminal device 200, such as a UE, referred to above. The information transmission device 190 may include a receiving unit 1901, an obtaining unit 1902, and a cyclic shift inverse operation unit 1903. Wherein, the receiving unit 1901 can be used to execute S601 in FIG. 14, and/or other processes for supporting the techniques described herein. The obtaining unit 1902 can be used to perform S602 in FIG. 14, and/or other processes for supporting the techniques described herein. The cyclic shift inverse operation unit 1903 can be used to perform S603 in FIG. 14, and/or other processes for supporting the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.

In the embodiment of the present application, the information transmission devices 160 to 190 are presented in a form in which each function is divided into individual functional modules, or are presented in an integrated manner to divide the functional modules. A "module" herein may refer to an application-specific integrated circuit (ASIC), a processor and memory that executes one or more software or firmware programs, integrated logic circuits, and/or other devices that provide the above functionality. The processor and the memory may be integrated or may be relatively independent.

In a simple embodiment, those skilled in the art will appreciate that any of the information transmission devices 160 to 190 can be realized by the structure shown in FIG.

As shown in FIG. 20, the information transmission device 210 may include a memory 2101, a processor 2102, and a communication interface 2103. The memory 2102 is configured to store computer execution instructions. When the information transmission device 210 is in operation, the processor 2101 executes the computer execution instructions stored in the memory 2102 to enable the information transmission device 210 to execute the information transmission method provided by the embodiment of the present application. For specific information transmission methods, refer to the related descriptions in the above and the drawings, and details are not described herein again. The communication interface 2103 can be a transceiver.

In one example, the transmitting unit 1603 can correspond to the communication interface 2103 in FIG. The scrambling unit 1601 and the mapping unit 1602 may be embedded in hardware or in a memory 2101 independent of the information transmission device 210.

In another example, receiving unit 1701 may correspond to communication interface 2103 in FIG. The obtaining unit 1702 and the descrambling unit 1703 may be embedded in hardware or in a memory 2101 independent of the information transmission device 210.

In another example, the transmitting unit 1803 can correspond to the communication interface 2103 in FIG. The cyclic shift unit 1801 and the mapping unit 1802 may be embedded in hardware or in a memory 2101 independent of the information transmission device 210.

In another example, receiving unit 1901 can correspond to communication interface 2103 in FIG. The acquisition unit 1902 and the cyclic shift inverse operation unit 1903 may be embedded in hardware or in a memory 2101 independent of the information transmission device 210.

Optionally, the information transmission device 210 may be a field-programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processing unit. (central processor unit, CPU), network processor (NP), digital signal processor (DSP), microcontroller (micro controller unit (MCU), can also use programmable controller (programmable Logic device, PLD) or other integrated chip.

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.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transmission to another website site, computer, server or data center via wired (eg coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device that includes one or more servers, data centers, etc. that can be integrated with the media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)) or the like.

Although the present application has been described herein in connection with the various embodiments, those skilled in the art can Other variations of the disclosed embodiments are achieved. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill several of the functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that the measures are not combined to produce a good effect.

While the present invention has been described in connection with the specific embodiments and embodiments thereof, various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the description and drawings are to be regarded as It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

Claims

An information transmission method, characterized in that the method comprises:

Obtaining the scrambled bit sequence according to the beam indication information;

And the modulated bit sequence is modulated and mapped to a time-frequency resource;

And transmitting, by the beam indicated by the beam indication information, the scrambled bit sequence mapped to the time-frequency resource to the terminal device.
The method according to claim 1, wherein the obtaining the scrambled bit sequence according to the beam indication information comprises:

Obtain an initialization factor of the scrambling sequence according to the beam indication information;

Determining the scrambling sequence according to an initialization factor of the scrambling sequence;

The scrambling bit sequence is scrambled according to the scrambling sequence to obtain a scrambled bit sequence.
The method according to claim 2, wherein the acquiring an initialization factor of the scrambling sequence according to the beam indication information comprises:

The initialization factor of the scrambling sequence is obtained according to the beam indication information, the cell index, and the slot number.
The method according to claim 3, wherein the obtaining an initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number includes:

According to the formula
Obtain the initialization factor c init of the scrambling sequence; where
Indicates rounding down, n s is the slot number,
Indicates a cell index, and offset represents a value associated with the beam indication information.
The method according to any one of claims 1 to 4, further comprising:

The beam indication information is sent to the terminal device by radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
An information transmission method, characterized in that the method comprises:

Receiving, by the base station, a signal transmitted by a beam, demodulating the signal number, and acquiring a bit sequence;

Decoding the bit sequence according to the beam indication information associated with the beam.
The method according to claim 8, wherein the descrambling the bit sequence according to the beam indication information comprises:

Obtaining an initialization factor of the scrambling sequence according to the beam indication information;

Determining the scrambling sequence according to an initialization factor of the scrambling sequence;

The bit sequence is descrambled according to the scrambling sequence.
The method according to claim 7, wherein the obtaining an initialization factor of the scrambling sequence according to the beam indication information comprises:

An initialization factor of the scrambling sequence is obtained according to the beam indication information, the cell index, and the slot number.
The method according to claim 8, wherein the acquiring an initialization factor of the scrambling sequence according to the beam indication information, the cell index, and the slot number includes:

According to the formula
Obtain the initialization factor c init of the scrambling sequence; where
Indicates rounding down, n s is the slot number,
Indicates a cell index, and offset represents a value associated with the beam indication information.
The method according to any one of claims 6 to 9, wherein the method further comprises:

The beam indication information is received by radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
An information transmission method, characterized in that the method comprises:

And cyclically shifting the first symbol group according to the beam indication information to obtain a second symbol group; wherein the first symbol group is a symbol group obtained by modulating original data bits;

Mapping the second symbol group to a time-frequency resource;

And transmitting, by the beam indicated by the beam indication information, the second symbol group mapped to the time-frequency resource to the terminal device.
The method according to claim 11, wherein the cyclically shifting the first symbol group according to the beam indication to obtain a second symbol group;

The first symbol group is cyclically shifted according to the beam indication information and the cell index to obtain a second symbol group.
The method according to claim 12, wherein the cyclically shifting the first symbol group according to the beam indication information and the cell index to obtain the second symbol group comprises:

According to the formula
Obtaining a second symbol group; wherein w(i) represents an ith element in the first symbol group,
Representing the i-th element in the second symbol group,
Indicates a cell index, and offset represents a value associated with the beam indication information.
The method according to any one of claims 11 to 13, wherein the method further comprises:

The beam indication information is sent to the terminal device by radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
An information transmission method, characterized in that the method comprises:

And receiving, by the beam, a second symbol group mapped to the time-frequency resource, where the second symbol group is a symbol group obtained by cyclically shifting the first symbol group according to the beam indication information, where the first symbol The group is a symbol group obtained by modulating original data bits, and the beam indication information is used to indicate the beam;

Obtaining the 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 the first symbol group.
The method according to claim 15, wherein the performing a cyclic shift inverse operation on the second symbol group according to the beam indication information to obtain the first symbol group comprises:

And performing cyclic shift inverse operation on the second symbol group according to the beam indication information and the cell index, to obtain the first symbol group.
The method according to claim 16, wherein the performing the cyclic shift inverse operation on the second symbol group according to the beam indication information and the cell index, to obtain the first symbol group, comprising:

According to the formula
Obtaining the first symbol group; wherein
Representing an i-th element in the second symbol group, w(i) representing an i-th element in the first symbol group,
Indicates a cell index, and offset represents a value associated with the beam indication information.
The method according to any one of claims 1 to 17, wherein the beam indication information comprises at least one of the following: a relative number of beams, a logical number of a beam, a physical number of a beam, a port number, The quasi-co-located QCL information, the beam pair connection information, the terminal device group, and the time domain symbol corresponding to the beam; wherein, the terminal device corresponding to each beam is a terminal device group.
The method according to any one of claims 15 to 18, wherein the method further comprises:

The beam indication information is received by radio resource control RRC signaling, media access control MAC signaling, or downlink control information DCI.
An information transmission device for performing the method according to any one of claims 1 to 19.
A computer readable storage medium having stored thereon a computer program, wherein the program is executed by a processor to implement the method of any one of claims 1 to 19.