WO2022033577A1

WO2022033577A1 - Communication method and apparatus

Info

Publication number: WO2022033577A1
Application number: PCT/CN2021/112454
Authority: WO
Inventors: 刘显达; 纪刘榴; 王明哲
Original assignee: 华为技术有限公司
Priority date: 2020-08-13
Filing date: 2021-08-13
Publication date: 2022-02-17
Also published as: CN114079490A

Abstract

A communication method and apparatus, which are used for solving the problem in the prior art of relatively high signaling overheads caused due to there being a large number of fields of a PRG for indicating a scheduling bandwidth of a PUSCH. In the present application, the method comprises: a terminal device receiving, from a network device, first information for indicating frequency hopping bandwidths of SRS resources, and second information for indicating indexes of some or all of the SRS resources; according to the first information and the second information, determining N PRGs corresponding to a scheduling bandwidth of a PUSCH; and sending the PUSCH according to the N PRGs, N being a positive integer. PRGs determined by means of frequency hopping bandwidths of SRS resources and indexes of the SRS resources are relatively accurate, thereby facilitating the improvement of the accuracy of the determined PRGs, and as such facilitating the improvement of the transmission performance of a PUSCH and reducing signaling overheads.

Description

A communication method and device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number 202010811997.4 and the application title "a communication method and device" filed with the China Patent Office on August 13, 2020, the entire contents of which are incorporated into this application by reference.

technical field

The present application relates to the field of communication technologies, and in particular, to a communication method and apparatus.

Background technique

The physical uplink shared channel (PUSCH) transmission modes supported in the new radio interface (NR) include a codebook-based transmission mode and a non-codebook-based transmission mode. The codebook-based transmission mode means that the base station indicates the transmission precoding indicator (transmmit precoding Matrix indicator, TPMI) of the PUSCH from a predefined codebook, and the UE sends the PUSCH according to the indicated TPMI. The non-codebook-based transmission mode utilizes the reciprocity of the uplink and downlink channels, and the terminal device determines the beamforming mode, such as precoding, used to transmit the uplink signal (eg, PUSCH) according to the downlink channel measurement result.

At present, taking the beamforming method as precoding as an example, the specific process of the non-codebook-based transmission mode is as follows: the base station sends a downlink reference signal or downlink channel to a user equipment (UE), and the UE can receive a downlink reference signal or a downlink channel according to the received data. The obtained downlink signal or downlink channel obtains the channel covariance matrix, and the channel covariance matrix is used to obtain the precoding of the adapted channel (for example, it may be an eigenvalue vector obtained by singular value decomposition (SVD)). The UE transmits a sounding reference signal (SRS) using corresponding precoding on different SRS resources respectively. The base station measures the SRS sent on different SRS resources, selects some SRS resources from multiple SRS resources, and indicates the selected SRS resources to the UE, and the UE sends the PUSCH to the base station according to the precoding corresponding to the indicated SRS resources.

In the prior art, for PUSCH transmission channel conditions with severe frequency selectivity, it may be defined that PUSCH corresponds to multiple precoding resource groups (precoding resource groups, PRGs), and one PRG uses one precoding. The precoding of each PRG can be indicated by an SRI field. As shown in Figure 1, the scheduling indication of PUSCH 1 includes two SRS resource indication (SRS resource indication, SRI) fields, that is, PUSCH corresponds to two PRGs, the SRI-1 field is used to indicate the precoding of PRG 1, and the SRI-2 field is used to indicate the precoding of PRG 1. The field is used to indicate the precoding of PRG 2; the scheduling indication DCI of PUSCH 2 includes four SRI fields, that is, the PUSCH corresponds to four PRGs, the SRI-1 field corresponds to PRG1, the SRI-2 field corresponds to PRG2, and the SRI-3 field corresponds to PRG3 , the SRI-4 field corresponds to PRG4, that is, the SRI-1 field is used to indicate the precoding of PRG1, the SRI-2 field is used to indicate the precoding of PRG2, the SRI-3 field is used to indicate the precoding of PRG3, and the SRI-4 field is used to indicate the precoding of PRG3. to indicate precoding of PRG4. However, when the scheduling bandwidth of the PUSCH is large, in order to ensure better transmission performance of the PUSCH, more SRI fields are required for indication, which increases signaling overhead. Usually, the SRI field is carried in downlink control information (downlink control information, DCI), and increasing the DCI overhead will seriously affect the downlink coverage performance of the network.

SUMMARY OF THE INVENTION

The present application provides a communication method and apparatus for improving PUSCH transmission performance and reducing signaling overhead.

In a first aspect, the present application provides a communication method. The method includes a first communication device receiving first information and second information from a second communication device, and determining a PUSCH according to the first information and the second information. N PRGs corresponding to the scheduling bandwidth, the PUSCH is sent according to the N PRGs, where the N is a positive integer, the first information is used to indicate the frequency hopping bandwidth of the SRS resource, and the second information is used to An index indicating part or all of the SRS resources in the SRS resources.

The first communication device in the method may be a terminal device, or a module in the terminal device, such as a chip.

Based on the above solution, the N PRGs corresponding to the scheduling bandwidth of the PUSCH are determined according to the frequency hopping bandwidth of the SRS resource and the index of the SRS resource indicated by the second information. In this way, the determined PRG can be more accurate, so that the DCI overhead can be reduced. Under the premise of not increasing, it is ensured that the beamforming mode of each PRG is as optimal as possible, thereby improving the transmission performance of PUSCH.

In a possible implementation manner, each PRG in the N PRGs corresponds to a frequency hopping bandwidth of the SRS resource.

In a possible implementation manner, the following relation 1 and/or relation 2 is satisfied between two PRGs in the N PRGs.

Relation 1, taking two PRGs that are adjacent in the frequency domain among the N PRGs as the first PRG and the second PRG as an example, the PRB with the lowest frequency in the first PRG and the PRB with the highest frequency in the second PRG respectively correspond to the SRS resources different frequency hopping bandwidths, the PRB with the lowest frequency in the first PRG and the PRB with the highest frequency in the second PRG are two adjacent PRBs on the scheduling bandwidth of the PUSCH.

Alternatively, the PRB with the highest frequency in the first PRG and the PRB with the lowest frequency in the second PRG respectively correspond to different frequency hopping bandwidths of the SRS resource, and the PRB with the highest frequency in the first PRG and the PRB with the lowest frequency in the second PRG respectively correspond to different frequency hopping bandwidths of the SRS resource. The PRBs are two adjacent PRBs on the scheduling bandwidth of the PUSCH.

Relation 2, taking any two PRGs of the N PRGs corresponding to the frequency hopping bandwidth of the same SRS resource as the third PRG and the fourth PRG as an example, the third PRG and the fourth PRG correspond to the same one of the SRS resources A frequency hopping bandwidth, and the indexes of the third PRG and the fourth PRG corresponding to the SRS resources indicated by the second information are different.

Taking any one of the N PRGs as a fifth PRG as an example, the first communication device determines a first frequency hopping bandwidth of the SRS resource corresponding to the fifth PRG, and sends the fifth PRG on the fifth PRG. The beamforming mode of the PUSCH is the beamforming mode for sending the first SRS, and the beamforming mode for sending the first SRS is the beamforming mode used for sending the SRS on the first frequency hopping bandwidth of the first SRS resource, wherein, The first SRS is carried on the first frequency hopping bandwidth of the first SRS resource, and the index of the first SRS resource is the resource index of part or all of the SRS indicated by the second information.

Through the above method, the beamforming mode for sending PUSCH on different PRGs is determined according to the beamforming mode used for sending SRS on the corresponding SRS resources and the corresponding frequency hopping bandwidth. In this way, the beamforming mode of different PRGs can be ensured. The methods are different, and are more suitable for the channel of uplink transmission, so that the transmission performance of the PUSCH can be improved.

In a possible implementation manner, the transmission of the first SRS is an SRS transmission with the smallest time domain interval from sending the second information.

In the above manner, the determined beamforming manner of each PRG is as optimal as possible.

In a possible implementation manner, the second information includes a sounding reference signal indication (sounding reference signal indication, SRI).

In a possible implementation manner, when the number of transmission layers of the PUSCH is equal to L, the N satisfies H×K/L, the H is the number of the SRS resources indicated by the second indication information, and the The K is the number of frequency hopping bandwidths of the SRS resources corresponding to the scheduling bandwidth of the PUSCH, and the H, K and L are all positive integers.

In a second aspect, the present application provides a communication method. The method includes a first communication device receiving third information from a second communication device, and determining M PRGs corresponding to the scheduling bandwidth of the PUSCH according to the third information, The PUSCH is sent according to the M PRGs, where M is a positive integer, and the third information is used to indicate the frequency hopping bandwidth and frequency hopping times of the PUSCH.

Based on the above solution, M PRGs corresponding to the scheduling bandwidth of the PUSCH can be determined according to the third information. In this way, the beamforming mode of each PRG can be ensured to be optimal, and the PUSCH can obtain frequency diversity gain.

In a possible implementation manner, each PRG in the M PRGs corresponds to a frequency hopping bandwidth of the PUSCH.

When one frequency hopping bandwidth of the PUSCH corresponds to multiple frequency hopping bandwidths of the SRS resources, the first communication device may further receive first information from the second communication device, where the first information is used for hopping the SRS resources frequency bandwidth;

Further, optionally, the first communication apparatus determines M PRGs corresponding to the scheduling bandwidth of the PUSCH according to the third information and the first information, wherein each PRG in the M PRGs A frequency hopping bandwidth corresponding to the SRS resource.

In a possible implementation manner, the first communication device may further receive first information and second information from the second communication device, where the first information is used to indicate the frequency hopping bandwidth of the SRS resource, so The second information is used to indicate the index of some or all of the SRS resources in the SRS resources;

Further, optionally, the first communication apparatus determines M PRGs corresponding to the scheduling bandwidth of the PUSCH according to the third information, the first information and the second information, wherein the M PRGs Each PRG in the PRG corresponds to a frequency hopping bandwidth of the SRS resource.

In a possible implementation manner, the PRB with the lowest frequency in the first PRG and the PRB with the highest frequency in the second PRG respectively correspond to different frequency hopping bandwidths of the SRS resource; wherein, the first PRG and the second PRG PRGs are two adjacent PRGs in the frequency domain among the M PRGs, and the PRB with the lowest frequency in the first PRG and the PRB with the highest frequency in the second PRG are the same frequency hopping of the scheduling bandwidth of the PUSCH Two PRBs that are adjacent in bandwidth.

In a possible implementation manner, the PRB with the highest frequency in the first PRG and the PRB with the lowest frequency in the second PRG respectively correspond to different frequency hopping bandwidths of the SRS resource; PRGs are two adjacent PRGs in the frequency domain among the M PRGs, and the PRB with the highest frequency in the first PRG and the PRB with the lowest frequency in the second PRG are the same frequency hopping of the scheduling bandwidth of the PUSCH Two PRBs that are adjacent in bandwidth.

In a possible implementation manner, the third PRG and the fourth PRG correspond to the same frequency hopping bandwidth of the SRS resource, and the third PRG and the fourth PRG correspond to the SRS resource indicated by the second information The indexes of are different; wherein, the third PRG and the fourth PRG are any two PRGs in the M PRGs.

In a possible implementation manner, the first communication apparatus determines a first frequency hopping bandwidth of the SRS resource corresponding to the fifth PRG, and the beamforming manner for sending the PUSCH on the fifth PRG is to send The beamforming mode of the first SRS, wherein the fifth PRG is any one of the M PRGs; the first SRS is carried on the first frequency hopping bandwidth of the first SRS resource, and the first The resource index of the SRS is the resource index of part or all of the SRS indicated by the second information.

In a possible implementation manner, the second information includes SRI.

In a possible implementation manner, when the number of transmission layers of the PUSCH is equal to L, the number of PRGs corresponding to the frequency hopping bandwidth of the PUSCH satisfies H×P/L, and the H is the indication of the second indication information The number of the SRS resources, the P is the number of frequency hopping bandwidths of the SRS resources corresponding to the frequency hopping bandwidth of the PUSCH, and the H, P and L are all positive integers.

In a third aspect, the present application provides a communication method. The method includes a second communication device determining first information and second information, and sending the first information and the second information to the first communication device, the first information and the second information being sent to the first communication device. The information is used to indicate the frequency hopping bandwidth of the SRS resource, and the second information is used to indicate the index of some or all of the SRS resources in the SRS resource; the first information and the second information are used to determine the scheduling bandwidth of the PUSCH The corresponding N PRGs, where N is a positive integer.

The second communication device in the method may be a network device, or a module in the network device, such as a chip.

In a possible implementation manner, the PRB with the lowest frequency in the first PRG and the PRB with the highest frequency in the second PRG respectively correspond to different frequency hopping bandwidths of the SRS resource; wherein, the first PRG and the second PRG PRGs are two adjacent PRGs in the frequency domain among the N PRGs, and the PRB with the lowest frequency in the first PRG and the PRB with the highest frequency in the second PRG are the two adjacent PRGs in the scheduling bandwidth of the PUSCH. PRBs.

In a possible implementation manner, the PRB with the highest frequency in the first PRG and the PRB with the lowest frequency in the second PRG respectively correspond to different frequency hopping bandwidths of the SRS resource; PRGs are two adjacent PRGs in the frequency domain in the N PRGs, and the PRB with the highest frequency in the first PRG and the PRB with the lowest frequency in the second PRG are the two adjacent PRGs in the scheduling bandwidth of the PUSCH PRBs.

In a possible implementation manner, the third PRG and the fourth PRG correspond to the same frequency hopping bandwidth of the SRS resource, and the third PRG and the fourth PRG correspond to the SRS resource indicated by the second information The indexes of are different; wherein, the third PRG and the fourth PRG are any two PRGs in the N PRGs.

In a possible implementation manner, the second information includes SRI.

In a possible implementation manner, the second communication apparatus sends the number of transmission layers L of the PUSCH to the first communication apparatus; wherein, the N satisfies H×K/L, and the H is the The number of the SRS resources indicated by the second indication information, the K is the number of frequency hopping bandwidths of the SRS resources corresponding to the scheduling bandwidth of the PUSCH, and the H, K and L are all positive integers.

For the beneficial effects of the third aspect, reference may be made to the description of the above-mentioned first aspect, which will not be repeated here.

In a fourth aspect, the present application provides a communication method, the method includes the second communication device determining third information, and sending the third information to the first communication device, where the third information is used to indicate the frequency hopping bandwidth of the PUSCH and the number of frequency hopping; the third information is used by the first communication apparatus to determine M PRGs corresponding to the scheduling bandwidth of the PUSCH, where M is a positive integer.

In a possible implementation manner, the second communication apparatus determines first information, where the first information is used to indicate the frequency hopping bandwidth of the sounding reference signal SRS resource; the second communication apparatus sends to the first communication apparatus The first information, the first information and the third information are used by the first communication apparatus to determine M PRGs corresponding to the scheduling bandwidth of the PUSCH, wherein each PRG in the M PRGs A frequency hopping bandwidth corresponding to the SRS resource.

In a possible implementation manner, the second communication apparatus determines first information and second information, where the first information is used to indicate a frequency hopping bandwidth of a sounding reference signal SRS resource, and the second information is used to indicate the The index of part or all of the SRS resources in the SRS resources; the second communication device sends the first information and the second information to the first communication device, the first information, the second information and the The third information is used by the first communication apparatus to determine M PRGs corresponding to the scheduling bandwidth of the PUSCH, wherein each PRG in the M PRGs corresponds to a frequency hopping bandwidth of the SRS resource.

In a possible implementation manner, the second information includes SRI.

In a possible implementation manner, the second communication apparatus sends the number of transmission layers L of the PUSCH to the first communication apparatus; wherein, the number of PRGs corresponding to the frequency hopping bandwidth of the PUSCH satisfies H×P /L, the H is the number of the SRS resources indicated by the second indication information, the P is the number of frequency hopping bandwidths of the SRS resources corresponding to the frequency hopping bandwidth of the PUSCH, the H, P and L is a positive integer.

For the beneficial effects of the fourth aspect, reference may be made to the description of the above-mentioned second aspect, which will not be repeated here.

In a fifth aspect, the present application provides a communication device, the communication device having the function of realizing the first communication device in the first aspect above, or being used to realize the function of the first communication device in the second aspect, or being used to realize The function of the second communication device in the above third aspect, or for implementing the function of the second communication device in the above fourth aspect. This function can be implemented by hardware or by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions.

In a possible implementation manner, the communication apparatus may be a terminal device, or a module usable in the terminal device, such as a chip or a chip system or a circuit. The communication apparatus may include a transceiver and a processor. The processor may be configured to support the communication apparatus to perform the corresponding functions of the terminal equipment shown above, and the transceiver is configured to support communication between the communication apparatus and network equipment, other terminal equipment, and the like. The transceiver may be an independent receiver, an independent transmitter, a transceiver with integrated transceiver functions, or an interface circuit. Optionally, the communication device may further include a memory, which may be coupled to the processor, and stores necessary program instructions and data for the communication device.

In a possible application, for the beneficial effects, reference may be made to the description of the above-mentioned first aspect, which will not be repeated here.

The transceiver is configured to receive first information and second information from the second communication device, where the first information is used to indicate the frequency hopping bandwidth of the sounding reference signal SRS resource, and the second information is used to indicate the The index of some or all of the SRS resources in the SRS resources; the processor is configured to determine, according to the first information and the second information, N precoding resource block groups PRG corresponding to the scheduling bandwidth of the physical uplink shared channel PUSCH, where the The N is a positive integer; the transceiver is further configured to send the PUSCH according to the N PRGs.

In a possible implementation manner, the processor is further configured to determine the first frequency hopping bandwidth of the SRS resource corresponding to the fifth PRG, and the beamforming manner for sending the PUSCH on the fifth PRG is to send the The beamforming mode of the first SRS, wherein the fifth PRG is any one of the N PRGs; the first SRS is carried on the first frequency hopping bandwidth of the first SRS resource, and the first The index of the SRS resource is the resource index of part or all of the SRS indicated by the second information.

In a possible implementation manner, the second information includes SRI.

In another possible application, for the beneficial effects, reference may be made to the description of the above-mentioned second aspect, which will not be repeated here.

The transceiver is configured to receive third information from the second communication device, where the third information is used to indicate the frequency hopping bandwidth and frequency hopping times of the physical uplink shared channel PUSCH; the processor is configured to information, determine M precoding resource block groups PRGs corresponding to the scheduling bandwidth of the PUSCH, and send the PUSCH according to the M PRGs, where M is a positive integer.

In a possible implementation manner, the transceiver is further configured to receive first information from the second communication apparatus, where the first information is used to indicate a frequency hopping bandwidth of the sounding reference signal SRS resource; the The processor is further configured to determine, according to the third information and the first information, M PRGs corresponding to the scheduling bandwidth of the PUSCH, wherein each PRG in the M PRGs corresponds to the SRS resource A frequency hopping bandwidth.

In a possible implementation manner, the transceiver is further configured to receive first information and second information from the second communication apparatus, where the first information is used to indicate frequency hopping of sounding reference signal SRS resources bandwidth, the second information is used to indicate indexes of some or all of the SRS resources in the SRS resources; the processor is further configured to, according to the third information, the first information and the second information, M PRGs corresponding to the scheduling bandwidth of the PUSCH are determined, wherein each PRG in the M PRGs corresponds to a frequency hopping bandwidth of the SRS resource.

In a possible implementation manner, the method processor is further configured to determine the first frequency hopping bandwidth of the SRS resource corresponding to the fifth PRG, and send the beamforming of the PUSCH on the fifth PRG The method is a beamforming method for sending the first SRS, wherein the fifth PRG is any one of the M PRGs; the first SRS is carried on the first frequency hopping bandwidth of the first SRS resource, so The resource index of the first SRS is the resource index of part or all of the SRS indicated by the second information.

In a possible implementation manner, the second information includes SRI.

In another possible implementation manner, the communication apparatus may be a network device, or a component usable in a network device, such as a chip or a system of chips or a circuit. The communication apparatus may include a transceiver and a processor. The processor may be configured to support the communication apparatus to perform the corresponding functions of the network equipment shown above, and the transceiver is configured to support communication between the communication apparatus and other network equipment, terminal equipment, and the like. The transceiver may be an independent receiver, an independent transmitter, a transceiver with integrated transceiver functions, or an interface circuit. Optionally, the communication device may further include a memory, which may be coupled to the processor, and stores necessary program instructions and data for the communication device.

In a possible application, for the beneficial effects, reference may be made to the description of the above-mentioned third aspect, which will not be repeated here.

The processor is configured to determine first information and second information, where the first information is used to indicate the frequency hopping bandwidth of the sounding reference signal SRS resources, and the second information is used to indicate part or all of the SRS resources An index of the SRS resource; a transceiver, configured to send the first information and the second information to the first communication apparatus, where the first information and the second information are used to determine N corresponding to the scheduling bandwidth of the PUSCH PRG, the N is a positive integer.

In a possible implementation manner, the second information includes SRI.

In a possible implementation manner, the transceiver is further configured to indicate the number of transmission layers L of the PUSCH to the first communication apparatus; wherein, the N satisfies H×K/L, and the H is the first 2. The number of the SRS resources indicated by the indication information, the K is the number of frequency hopping bandwidths of the SRS resources corresponding to the scheduling bandwidth of the PUSCH, and the H, K and L are all positive integers.

In another application, for the beneficial effects, reference may be made to the description of the above-mentioned fourth aspect, which will not be repeated here.

The processor is configured to determine third information, where the third information is used to indicate the frequency hopping bandwidth and frequency hopping times of the physical uplink shared channel PUSCH; the transceiver is configured to send the third information to the first communication device , the third information is used by the first communication apparatus to determine M precoding resource block groups PRG corresponding to the scheduling bandwidth of the physical uplink shared channel PUSCH, where M is a positive integer.

In a possible implementation manner, the processor is further configured to determine first information, where the first information is used to indicate a frequency hopping bandwidth of the sounding reference signal SRS resource; the transceiver is further configured to communicate with the first The device sends the first information, and the first information and the third information are used by the first communication device to determine M PRGs corresponding to the scheduling bandwidth of the PUSCH, wherein each of the M PRGs Each PRG corresponds to one frequency hopping bandwidth of the SRS resource.

In a possible implementation manner, the processor is further configured to determine first information and second information, where the first information is used to indicate a frequency hopping bandwidth of the sounding reference signal SRS resource, and the second information is used to indicate an index of some or all of the SRS resources in the SRS resources;

In a possible implementation manner, the transceiver is further configured to send the first information and the second information to the first communication apparatus, the first information, the second information and the first information The third information is used by the first communication apparatus to determine M PRGs corresponding to the scheduling bandwidth of the PUSCH, wherein each PRG in the M PRGs corresponds to a frequency hopping bandwidth of the SRS resource.

In a possible implementation manner, the second information includes SRI.

In a possible implementation manner, the transceiver is further configured to indicate the number of transmission layers L of the PUSCH to the first communication device; wherein, the number of PRGs corresponding to the frequency hopping bandwidth of the PUSCH satisfies H×P /L, the H is the number of the SRS resources indicated by the second indication information, the P is the number of frequency hopping bandwidths of the SRS resources corresponding to the frequency hopping bandwidth of the PUSCH, the H, P and L is a positive integer.

In a sixth aspect, the present application provides a communication device for implementing the first aspect or any method in the first aspect, or for implementing any one in the second aspect or the second aspect. The method, or used to implement any one of the third aspect or the third aspect, or used to implement any one of the fourth aspect or the fourth aspect, including corresponding functional modules, respectively used to implement steps in the above method. The functions can be implemented by hardware, or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions.

In a possible implementation manner, the communication device may be a terminal device, and the communication device may include a processing module and a transceiver module, and these modules may perform the corresponding functions of the terminal device in the above method example. For details, please refer to the detailed description in the method example. , will not be repeated here.

In another possible implementation manner, the communication apparatus may also be a network device, and the communication apparatus may include a transceiver module and a processing module, and these modules may perform the corresponding functions of the network device in the above method examples. For details, please refer to the method examples. The detailed description will not be repeated here.

In a seventh aspect, the present application provides a communication system, where the communication system includes a terminal device and a network device. Wherein, the terminal device can be used to execute any method in the first aspect or the first aspect, and the network device can be used to execute any method in the third aspect or the third aspect; or, the terminal device can use In order to perform the above second aspect or any one of the methods in the second aspect, the network device may be used to perform any one of the above fourth aspect or the method in the fourth aspect.

In an eighth aspect, the present application provides a computer-readable storage medium, in which a computer program or instruction is stored, and when the computer program or instruction is executed by a communication device, the communication device is made to perform the above-mentioned first aspect or the first aspect. The method in any possible implementation of the one aspect, or the communication device is caused to perform the method in the second aspect or any possible implementation of the second aspect, or the communication device is caused to perform the third aspect or the third aspect. The method in any possible implementation, or causing the communication apparatus to perform the fourth aspect or the method in any possible implementation of the fourth aspect.

In a ninth aspect, the present application provides a computer program product, the computer program product includes a computer program or an instruction, when the computer program or instruction is executed by a communication device, the communication device is made to perform the above-mentioned first aspect or any of the first aspects. The method in a possible implementation, or the communication device is caused to perform the method in the second aspect or any possible implementation of the second aspect, or the communication device is caused to perform the third aspect or any possible implementation of the third aspect. The method in the implementation manner, or the communication apparatus is caused to perform the method in the fourth aspect or any possible implementation manner of the fourth aspect.

Description of drawings

1 is a schematic diagram of a manner of indicating a PRG of a PUSCH in the prior art;

FIG. 2 is a schematic diagram of a frequency hopping mode provided by a kind of SRS resource for this application;

3 is a schematic diagram of the architecture of a communication system provided by the present application;

4 is a schematic diagram of a multi-TRP scenario provided by the present application;

5 is a schematic diagram of the relationship between the number of PRBs included in a PRG provided by the application and the corresponding DCI transmission performance;

6 is a schematic flowchart of a method of a communication method provided by the present application;

7a is a schematic diagram of the relationship between a scheduling bandwidth of a PUSCH and a frequency hopping bandwidth of an SRS resource provided by the present application;

7b is a schematic diagram of the relationship between the scheduling bandwidth of another PUSCH and the frequency hopping bandwidth of the SRS resource provided by the application;

8 is a schematic diagram of the relationship between the frequency hopping bandwidth and the actual frequency hopping bandwidth of a kind of SRS resource provided by the present application;

9 is a schematic diagram of the relationship between the scheduling bandwidth of another PUSCH and the frequency hopping bandwidth of the SRS resource provided by the present application;

10 is a schematic flowchart of another communication method provided by the application;

11 is a schematic structural diagram of a communication device provided by the application;

12 is a schematic structural diagram of a communication device provided by the application;

13 is a schematic structural diagram of a terminal device provided by the application;

FIG. 14 is a schematic structural diagram of a network device provided by this application.

detailed description

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Hereinafter, some terms used in this application will be explained. It should be noted that these explanations are for the convenience of those skilled in the art to understand, and do not limit the scope of protection required by the present application.

1) Coherent joint reception

Coherent joint reception refers to a technique in uplink coordinated multi-point transmission (CoMP). In order to improve the reliability of uplink signal reception, multiple receiving nodes with a certain degree of spatial isolation will simultaneously exist on the network device side to receive the same uplink signal. Among them, multiple receiving nodes can coherently combine the received signals to improve the antenna gain. For example, multiple receiving nodes can perform fast Fourier transform (fast Fourier transformation, FFT) transformation on the received signals, splicing them into a higher-dimensional signal matrix, and perform a minimum mean square error (minimum square error) on the signal matrix. mean square error, MMSE), or maximum ratio combining (maximum ratio combining, MRC) processing, which equivalently improves the signal-to-noise ratio of the received signal.

2) Beamforming (beamforming)

The beamforming operation at the transmitting end refers to the use of the multi-antenna concurrent capability of the transmitting end to form a directional transmit signal in the transmission space by superimposing different phases on each transmit antenna to improve the signal transmission quality. One way of operating beamforming is to use a precoding matrix W to map transmission layers or modulation symbols to individual transmit antennas or transmit antenna ports. For example, the beamforming operation is:

where W is the precoding matrix, [y ⁽⁰⁾ (i)...y ^(υ-1) (i)] ^T is the modulation symbol on each transmission layer, {p ₀ ...p _ρ-1 } Corresponding to the transmit antenna port, z is the modulation symbol sent on each transmit antenna port. The dimension of the precoding matrix may be P*R, where R is the number of transmission layers, and the number of transmission layers refers to the number of streams of orthogonal signals formed by a transport block (transport block, TB) or a code word (code word) in space; P is the number of antenna ports. Another way of operating beamforming is by adjusting the analog phase shifter on each transmit antenna port to form a directional beam, thereby improving the quality of the signal transmission.

3) Precoding resource block group (precoding resource group, PRG)

A PRG refers to a group of PRBs using the same beamforming method (eg, a precoding matrix). The PRG in this application is a frequency domain concept, that is, each PRG includes at least one PRB. The PRGs are defined based on the scheduling bandwidth of the PUSCH, and each PRG includes a part of the PRBs in the scheduling bandwidth of the PUSCH. The scheduling bandwidth of the PUSCH refers to the bandwidth occupied by the PUSCH indicated by the network device through signaling. Usually, the PRBs in a PRG are consecutive. The so-called PRBs being consecutive means that the numbers of the PRBs are consecutive. For example, the scheduling bandwidth of the PUSCH includes PRB ₀ , PRB ₁ , PRB ₂ . . . PRB ₀ and PRB ₁ are two consecutive PRBs, and PRB ₁ and PRB ₂ are two consecutive PRBs. For another example, the scheduling bandwidth of PUSCH includes PRB ₀ , PRB ₂ , PRB ₅ . . ., then PRB ₀ and PRB ₂ are two consecutive PRBs, and PRB ₂ and PRB ₅ are also two consecutive PRBs. The physical resource block (physical resource block, PRB) includes 12 consecutive subcarriers. By defining PRGs, the PUSCH can be sent in a frequency-selective beamforming manner, and the PRBs in the same PRG can be used for joint channel estimation, which can take into account the performance of channel estimation.

4) Frequency hopping mode of SRS resources

The terminal device will send the SRS on the SRS resource. The configuration of an SRS resource includes time-frequency resources occupied by the resource. The SRS resource can be configured with a frequency hopping mode, which usually means that one SRS resource does not occupy the entire system bandwidth within one orthogonal frequency division multiplexing (OFDM) symbol, that is, it is filled by multiple OFDM symbols. The system bandwidth refers to the bandwidth that the terminal device can communicate with the network device, and the system bandwidth can be understood as a carrier (component carrier), or a bandwidth part (BWP). It can also be understood that one OFDM symbol can sound a part of the system bandwidth, and multiple OFDM symbols, or even multiple slots (slots composed of multiple OFDM symbols) are required to sound the entire system bandwidth. That is, for the same SRS resource, the bandwidth occupied by the SRS resource on different OFDM symbols is different.

As shown in FIG. 2 , a schematic diagram of a SRS resource provided by the present application is a frequency hopping mode. The configured 4 SRS resources (SRS resource 0, SRS resource 1, SRS resource 2, and SRS resource 3) occupy the same bandwidth on the same symbol, and each SRS resource occupies 4 symbols in the time domain. occupy different bandwidth. For the SRS on each SRS resource, one OFDM symbol can detect 1/4 of the system bandwidth, and 4 OFDM symbols are required to detect the entire system bandwidth. Correspondingly, the network device can receive the SRS on the 4 symbols respectively, so as to obtain a complete uplink channel according to the SRS received on the 4 symbols.

It should be noted that, in this application, the SRS resource and the scheduling bandwidth of the PUSCH are located in the same carrier (component carrier, CC), or in the same partial bandwidth (bandwidth part, BWP). It can also be understood that the SRS resource and the scheduling bandwidth of the PUSCH are located within the same system bandwidth.

5) Uplink transmission mechanism based on non-codebook

In the existing non-codebook uplink transmission mechanism, the terminal device transmits the SRS in different beamforming manners on multiple SRS resources respectively. The network device will indicate at least one SRS resource or SRS port (one SRS resource may include one SRS port) when scheduling the PUSCH, and the terminal device determines the beamforming mode adopted by the transmission layer of the PUSCH according to the indicated SRS resource. There is a correspondence between SRS resources or SRS ports and a PUSCH transmission layer. For example, one SRS resource corresponds to one PUSCH transmission layer; for another example, multiple SRS resources correspond to one PUSCH transmission layer.

Some terms involved in this application are introduced above, and a communication system architecture applicable to this application is introduced below. FIG. 3 is a schematic diagram of the architecture of a communication system to which the present application can be applied. As shown in FIG. 3 , the communication system may include a network device 101 and a terminal device 102 . Terminal devices can communicate with network devices wirelessly. Terminal equipment can be fixed or movable. FIG. 3 is only a schematic diagram, the communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG. 3 . This application does not limit the number of network devices and terminal devices included in the communication system.

A network device is an access device that a terminal device wirelessly accesses to the communication system, and can provide a wireless communication function for the terminal device. It can be a base station (base station), an evolved base station (evolved NodeB, eNodeB), a transmission (transmission and reception) point (transmission reception point, TRP), the next generation base station (next generation NodeB, gNB) in the 5G communication system, future communication A base station in the system or an access node in a wireless-fidelity (WiFi) system, etc.; it can also be a module or unit that completes some functions of the base station, for example, it can be a centralized unit (central unit, CU), or It can be a distributed unit (DU). The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

A terminal device may also be referred to as a terminal, user equipment (UE), a mobile station, a mobile terminal, and the like. The terminal equipment can be mobile phone, tablet computer, computer with wireless transceiver function, virtual reality terminal equipment, augmented reality terminal equipment, wireless terminal in industrial control, wireless terminal in unmanned driving, wireless terminal in remote surgery, smart grid wireless terminals in transportation security, wireless terminals in smart cities, wireless terminals in smart homes, etc. This application does not limit the specific technology and specific device form adopted by the terminal device.

Network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle; can also be deployed on water; can also be deployed in the air on aircraft, balloons and satellites. This application does not limit the application scenarios of network devices and terminal devices.

The network device and the terminal device can communicate through the licensed spectrum, the unlicensed spectrum, or the licensed spectrum and the unlicensed spectrum at the same time. The network device and the terminal device can communicate through the frequency spectrum below 6 GHz (gigahertz, GHz), and can also communicate through the frequency spectrum above 6 GHz, and can also use the frequency spectrum below 6 GHz and the frequency spectrum above 6 GHz for communication at the same time. This application does not limit the spectrum resources used between the network device and the terminal device.

The communication system in this application may be a fourth generation (4th generation, 4G) mobile communication system, or a fifth generation (5th generation, 5G) mobile communication system, or may be other communication systems, such as a public land mobile network (public land mobile network). land mobile network, PLMN) system, or other mobile communication systems that may appear in the future, etc., are not limited in this application.

This application applies to scenarios with single-TRP or multi-TRP, as well as scenarios derived from any of them. Referring to FIG. 4 , a multi-TRP scenario is provided for this application. Multiple TRPs 302 can be connected to the same baseband unit (baseband unit, BBU) 301, or can be connected to different BBUs 301, which are not limited in this application. The BBU in FIG. 4 takes the base station as an example, and the TRP takes the terminal device as an example for example. . An implementation form of the multi-TRP scenario in 4G is a single frequency network cell (single frequency network cell, SFN cell), and an implementation form in 5G is a hyper cell (hyper cell). It should be noted that when PUSCH adopts frequency selective precoding in this application, it is found through simulation that the gain obtained in the multi-transmission reception point (multi-transmission reception point, multi-TRP) scenario is higher than that of a single-transmission reception The gain in the node (single-transmission reception point, single-TRP) scenario. It should be understood that the present application is also applicable to scenarios of homogeneous networks and heterogeneous networks.

It should be noted that the system architecture and application scenarios described in this application are for the purpose of illustrating the technical solutions of this application more clearly, and do not constitute a limitation on the technical solutions provided in this application. The evolution of new scenarios and the emergence of new scenarios, the technical solutions provided in this application are also applicable to similar technical problems.

Referring to FIG. 3 or FIG. 4 above, the network device needs to acquire channel information before scheduling uplink data (eg, PUSCH used to carry uplink control information and service data). Here, the terminal equipment is required to send the SRS to the network equipment on the SRS resource, and the network equipment measures the SRS sent by the terminal equipment, and then according to the measurement result, can select the SRS resource with better performance to be allocated to the terminal equipment, so that the terminal equipment can send the uplink data. That is, the network device can measure the SRS to determine the uplink channel quality, so as to perform uplink frequency selective scheduling.

In practical applications, after the terminal device accesses the network, the network device will send a downlink reference signal or a downlink channel to the terminal device, and the network device will configure SRS resources for the terminal device. The terminal device can obtain the beamforming mode of the adapted channel based on the downlink reference signal or the downlink channel, and the terminal device can use the acquired beamforming mode on the SRS resources configured by the network device to weight the transmit antennas to transmit the SRS. Correspondingly, the network device may receive and measure the SRS on the corresponding SRS resource to obtain uplink channel information. It should be understood that there are usually multiple SRS resources configured by the network device for the terminal device, and the network device may select some SRS resources from the multiple SRS resources based on the obtained uplink channel information (for example, the network device may The power or strength of the received SRS or signal noise rate (signal noise rate, SNR), etc., select the SRS resource corresponding to the SRS with better signal quality), and indicate the selected SRS resource to the terminal equipment through DCI. Specifically: the network device may respectively indicate the index of the selected SRS resource to the terminal device. The selected SRS resource can be indicated by the SRI field, and different SRI field indication values correspond to different SRS resources. One SRI field can indicate one SRS resource or multiple SRS resources. The SRI field can be carried in DCI or wireless In resource control (radio resource control, RRC); the terminal device can determine the SRS resources indicated by the network device and the number of SRS resources according to the received SRI field in the DCI or RRC, and determine the PUSCH according to the number of the indicated SRS resources. The number of transmission layers, and the beamforming method adopted by each transmission layer. It can also be understood that the network device selects one or more beamforming modes from multiple candidate beamforming modes determined by the terminal device, and indicates to the terminal device through the SRI field. The network device can also select one or more beamforming modes from multiple beamforming modes by itself, and indicate to the terminal device through the SRI field. It should be understood that the number of transmission layers of the PUSCH may change dynamically with the indicated number of SRS resources.

In order to improve the spectral efficiency and reliability of the uplink transmission, the terminal device usually transmits the PUSCH by using frequency selective precoding, that is, the scheduling bandwidth of the PUSCH is divided into PRGs. The network device may indicate multiple SRI fields, each SRI field corresponds to a PRG, and the terminal device determines, according to the SRI field in the received DCI, the beamforming mode used when sending data on the PRG corresponding to the scheduling bandwidth of the PUSCH. With reference to the above FIG. 1 , the scheduling indication of PUSCH1 includes two SRI fields, and one SRI field corresponds to one PRG. Therefore, the scheduling bandwidth of PUSCH1 can be divided into two PRGs. Specifically, the indication value of SRI field 1 = 0 and the indication value of SRI field 2 = 1, the indication value of SRI field 1 = 0 corresponds to the beamforming mode used to transmit data on PRG1, and the indication value of SRI field 2 = The field of 1 corresponds to the beamforming mode used to transmit data on PRG2. Further, optionally, the terminal device may determine that the SRI field indication value=0 corresponds to the corresponding relationship between the SRI field indication value and the SRS resource (refer to the following introduction about Table 1 to Table 5, which will not be repeated here). (for the convenience of description, the SRS resource corresponding to the SRI field indication value=0 may be referred to as SRS resource 0), the SRI field indication value=1 corresponding to the SRS resource (for the convenience of description, the SRI field indication value=1 corresponding to The SRS resource may be referred to as SRS resource 1); then determine the beamforming method used to send data on SRS resource 0 and the beamforming method used to send data on SRS resource 1, and according to the data sent on SRS resource 0 The beamforming mode adopted and the beamforming mode adopted to transmit data on SRS resource 1 are used to transmit the PUSCH.

Generally, the smaller the granularity of the PRG (that is, the smaller the number of PRBs included in the PRG), the finer the beamforming mode corresponding to the PRG, and the better the beamforming mode can match the transmission channel, so that the transmission performance of the PUSCH can be better. However, for the same scheduling bandwidth of PUSCH, the smaller the granularity of the PRG, the more the number of PRGs included in the scheduling bandwidth of PUSCH, and since a PRG needs an SRI field indication, the number of SRI fields will be larger, which will increase The overhead of the DCI carrying the SRI field will reduce the transmission performance of the DCI. Referring to FIG. 5 , when one PRG includes 8 PRBs, the corresponding DCI transmission performance is higher than the corresponding DCI transmission performance when one PRG includes 16 PRBs. Especially in the scenario where the scheduling bandwidth of PUSCH is large, if more PRGs are included, the transmission performance of DCI will be lower.

In view of this, the present application proposes a communication method, through which the PRG determined has high accuracy, thereby helping to improve the transmission performance of the PUSCH and reducing signaling overhead.

Before introducing the communication method provided by the present application, the corresponding relationship between the indication value of the SRI field and the index of the SRS resource is first described.

In a possible implementation manner, the corresponding relationship between the indication value of the SRI field and the index of the SRS resource may refer to Table 1 to Table 4 below. The terminal device can obtain in advance the method of how to determine the index of the SRS resource corresponding to the value indicated by the SRI field. For example, the terminal device can obtain in advance the number of SRS resources configured for PUSCH channel state information measurement N _SRS (corresponding to Table 1). NSRS in -4), wherein the configured _NSRS _SRS resources can be used for the above-mentioned non-codebook-based transmission mode transmission, and the _NSRS can be configured through RRC signaling; and the information indicated by the SRI field can be obtained in advance The maximum number of SRS resources, and the indication information for interpreting the SRI field from one of Table 1 to Table 4 is determined according to the above information. In this application, in Tables 1 to 4, one indicated SRS resource may correspond to one PUSCH transmission layer, or multiple indicated SRS resources may correspond to one PUSCH transmission layer.

It should be noted that the corresponding relationship between the index value of the SRI field and the SRS resource obtained by the terminal device may be notified by the network device to the terminal device, or may be predetermined by the protocol, or may be predetermined by the network device and the terminal device. This is not limited.

Table 1 The maximum number of SRS resources that can be selected is 1, and the meaning of the value indicated by the SRI field

Table 2 When the maximum number of SRS resources that can be selected is 2, the meaning of the value indicated by the SRI field

Table 3 When the maximum number of SRS resources that can be selected is 3, the meaning of the value indicated by the SRI field

Table 4 When the maximum number of SRS resources that can be selected is 4, the meaning of the value indicated by the SRI field

It can be determined from the above Tables 1 to 4: when the maximum number of SRS resources that can be selected is 1, the index of the SRS resource indicated by the SRI field indication value can be determined from Table 1, and each SRI field indication value corresponds to The number of SRS resources is 1; when the maximum number of SRS resources that can be selected is 2, the index of the SRS resources indicated by the SRI field indication value can be determined from Table 2, and the number of SRS resources corresponding to each SRI field indication value can be is 1 to 2; when the maximum number of SRS resources that can be selected is 3, the index of the SRS resources indicated by the SRI field indication value can be determined from Table 3, and the number of SRS resources corresponding to each SRI field indication value can be 1 to 3; when the maximum number of SRS resources that can be selected is 4, the index of the SRS resource indicated by the SRI field indication value can be determined from Table 4, and the number of SRS resources corresponding to each SRI field indication value can be 1 to 4 . Tables 1 to 4 are schematic representations of the correspondences, and in the implementation process, they may be similar correspondences or sets of correspondences, or parts of the foregoing correspondences. In one embodiment, the network device or the terminal device may store the above-mentioned correspondence. In one embodiment, the corresponding relationships in Tables 1 to 4 are the same in some cases, for example, the same field indication value and the same N _srs are the same, and can also be combined into a corresponding relationship set.

It should be understood that the above-mentioned Tables 1 to 4 are only exemplary implementations showing the corresponding relationship between the SRI field indication value and the index of the SRS resource. In addition, the number of bits of the SRI field corresponding to different tables is different.

Further, when the maximum number of SRS resources that can be selected is 1 and the number of configured SRS resources N _SRS = 2, the index of the SRS resource indicated by the SRI field indication value can be determined according to the first two columns of Table 1. For example, when the indicated value of the SRI field = 0, the index of the indicated SRS resource is 0 (called SRS resource 0), that is, the SRI field indicates SRS resource 0; when the indicated value of the SRI field = 1, the indicated SRS resource has an index of 0. The index is 1 (called SRS resource 1), that is, the SRI field indicates SRS resource 1. When the maximum number of selectable SRS resources is 1 and the number of configured SRS resources N _SRS = 3, the index of the SRS resource of the value indicated by the SRI field can be determined according to the third and fourth columns of Table 1. For example, when the indicated value of the SRI field = 0, the index of the indicated SRS resource is 0 (called SRS resource 0), that is, the SRI field indicates SRS resource 0; when the indicated value of the SRI field = 1, the indicated SRS resource has an index of 0. The index is 1 (called SRS resource 1), that is, the SRI field indicates SRS resource 1; when the SRI field indicates the value = 2, the index of the indicated SRS resource is 2 (called SRS resource 2), that is, the SRI field indicates SRS resource 2; when the value indicated by the SRI field = 3, the index of the indicated SRS resource is 3 (referred to as SRS resource 3), that is, the SRI field indicates SRS resource 3.

In a possible implementation manner, the value indicated by the SRI field may also be represented by a binary number; for example, Table 4 may also be represented by the following Table 5. It should be understood that the specific representation of the value indicated by the SRI field may be agreed between the network device and the terminal device, or may be determined by the network device and notified to the terminal device, or may be specified by a protocol, which is not limited in this application.

Table 5 Meaning of the SRI field indication value when the maximum number of SRS resources that can be selected is 4

In this application, the multiple SRS resources indicated by the SRI field may each correspond to the transmission layer of one PUSCH, or some of the SRS resources in the multiple SRS resources may collectively correspond to the transmission layer of one PUSCH. Each of the SRS resources corresponds to different PRGs of the PUSCH.

Exemplarily, in Table 1, for any indicated value of the SRI field, the number of transmission layers of the PUSCH is 1.

In Table 2, for any indicated value of the SRI field, the number of transmission layers of the PUSCH is 1. When the indicated value of the SRI field is any one of 0 to 3, each PRG on the scheduling bandwidth of the PUSCH corresponds to the indication of the SRI field. The SRS resource indicated by the value, when the SRI field indicates that the value is any of 4-9, there are different PRGs corresponding to different SRS resources on the scheduling bandwidth of the PUSCH. For example, when the SRI field indicates that the value is 4, the SRS resource 0 corresponds to PRG 0, SRS resource 1 corresponds to PRG 1.

In Table 3, similar to Table 2, for any indicated value of the SRI field, the number of transmission layers of the PUSCH is 1. When the indicated value of the SRI field is any one of 0-3, each PRG on the scheduling bandwidth of the PUSCH is Corresponding to the SRS resource indicated by the indicated value of the SRI field, when the indicated value of the SRI field is any one of 4-13, there are different PRGs corresponding to different SRS resources on the scheduling bandwidth of the PUSCH, for example, when the indicated value of the SRI field is 10 , SRS resource 0 corresponds to PRG 0, SRS resource 1 corresponds to PRG 1, and SRS resource 2 corresponds to PRG2.

In Table 4, for the indicated value of the SRI field, the number of transmission layers of PUSCH is 1, and the indicated value of the SRI field is 14, and the number of transmission layers of PUSCH is 2. When the indicated value of the SRI field is any one of 0-13, the same as Table 1-3, when the indicated value of the SRI field is 14, the number of transmission layers of PUSCH is 2, and there are different PRGs corresponding to different SRSs in the scheduling bandwidth of PUSCH Resource, for example, SRS resource 0 and SRS resource 1 correspond to PUSCH transmission layer 1, SRS resource 2 and SRS resource 3 correspond to PUSCH transmission layer 2, for each PUSCH transmission layer, different SRS resources correspond to different PRGs, such as SRS Resource 0 and SRS resource 2 correspond to PUSCH transmission layer 1 and transmission layer 2 on PRG 0, respectively, and SRS resource 1 and SRS resource 3 correspond to PUSCH transmission layer 1 and transmission layer 2 on PRG 1, respectively.

It can be seen that only the field indication value 14 in Table 4 can be used to indicate the PUSCH transmission with more than one layer. In order to improve the flexibility of the network device to indicate the PUSCH beamforming mode, it can further be used for the case where the number of PUSCH transmission layers is greater than 1. Table 6 is designed. There are multiple field indication values in Table 6 to indicate the beamforming mode when the number of PUSCH transmission layers is greater than 1.

Table 6 When the number of transmission layers of PUSCH = 2, the meaning of the value indicated by the SRI field

It should be noted that the communication method provided by the present application may be applied to the communication system shown in FIG. 3 or the application scenario shown in FIG. 4 . In addition, the method may be performed by two communication devices, such as a first communication device and a second communication device, wherein the first communication device may be a terminal device or a module applicable to the terminal device, such as a chip. The second communication device may be a network device or a module applicable to the network device, such as a chip. The method provided by the present application will be described below by taking the example that the first communication device is a terminal device and the second communication device is a network device.

Referring to FIG. 6 below, it is a schematic flowchart of a method of a communication method provided by the present application. The method includes the following steps:

Step 601, the network device determines the first information and the second information.

Here, the first information is used to indicate the frequency hopping bandwidth of the SRS resources, and the second information is used to indicate indexes of some or all of the SRS resources in the SRS resources.

Among them, the frequency hopping bandwidth of the SRS resource refers to: for the same SRS resource, there are multiple transmissions in the time domain, the frequency domain resources occupied by each transmission are different, and the frequency domain resources occupied by one transmission (or called bandwidth or RB number) is the frequency hopping bandwidth.

2, the network device can configure 4 SRS resources for the terminal device, and the indexes of the 4 SRS resources are 0-3, which can be called SRS resource 0, SRS resource 1, SRS resource 2 and SRS resource 3; the first information It can be used to indicate that the frequency hopping bandwidth of each SRS resource (that is, SRS resource 0, SRS resource 1, SRS resource 2 and SRS resource 3) is 16 PRBs, and the PRB position occupied by each frequency hopping bandwidth is shown in Figure 2. Show.

It should be understood that the frequency hopping bandwidth of the SRS resource indicated by the first information can also be 4 PRBs, 8 PRBs, or 32 PRBs, etc. Generally, the size of the frequency hopping bandwidth is related to the uplink coverage performance of the terminal equipment. When the performance is poor, the number of PRBs included in the frequency hopping bandwidth is usually smaller; on the contrary, when the uplink coverage performance is better, the number of PRBs included in the frequency hopping bandwidth is usually larger. Each PRB includes 12 subcarriers, and the corresponding bandwidth of each subcarrier can be 15kHz or 30kHz or 60kHz or 120kHz; the total number of PRBs occupied by SRS resources can be the system bandwidth or BWP or the total number of PRBs occupied by the carrier, which can be smaller than the PRB Usually, in order to ensure the SRS transmission performance, the PRBs included in each frequency hopping bandwidth are configured to be continuous; the frequency hopping rule refers to the pre-defined position of the frequency hopping bandwidth on each OFDM symbol, different OFDM symbols The frequency hopping bandwidths are non-overlapping.

Further, optionally, the network device may select the SRS resource from the configured multiple SRS resources based on the strength or power of the SRS signal from the terminal device; the second information may be used to indicate the index of the selected SRS resource. It should be understood that the selected SRS resource may be part or all of the SRS resource set, the SRS resource set includes at least one SRS resource, and the SRS resource set is a resource set based on non-codebook uplink transmission, and the SRS resource in the resource set Configuration through RRC signaling includes configuring the index of each SRS resource, frequency hopping bandwidth configuration, power information configuration, sequence configuration, etc. For example, the second information may be an SRI field, and the meaning of the value indicated by the SRI field may refer to Tables 1-4 and Table 6 above.

In a possible implementation manner, the first information may include the frequency hopping bandwidth size configuration information of the SRS resources, the total number of PRBs occupied by the SRS resources, the location configuration information of each PRB, and the frequency hopping rules, and configure the SRS for the terminal device. The hopping bandwidth of the resource. It should be noted that the first information includes information that can indicate the position and number of PRBs occupied by the SRS resources in each transmission. It can include the information exemplified above, or other information, which this application does not do. limited.

Step 602, the network device sends the first information and the second information to the terminal device. Accordingly, the terminal device receives the first information and the second information from the network device.

Here, in a possible implementation manner, the first information may be carried in radio resource control (radio resource control, RRC) signaling, and the second information may be carried in DCI signaling. Generally, the network device may first send the RRC signaling to the terminal device, and then send the DCI signaling. In another possible manner, the first information and the second information may also be carried in the same message.

Step 603, the terminal device may determine N PRGs corresponding to the scheduling bandwidth of the PUSCH according to the first information and the second information, where N is a positive integer.

Here, determining the N PRGs corresponding to the scheduling bandwidth of the PUSCH by the terminal device refers to: determining the number N of PRGs corresponding to the scheduling bandwidth of the PUSCH, the number of PRBs included in each PRG in the N PRGs, and the number of PRBs included in each PRG. For the possible determination methods of the starting position and the ending position, reference may be made to the following implementation manners 1 and 2, which will not be repeated here.

It should be understood that the above-mentioned determination of the N PRGs corresponding to the scheduling bandwidth of the PUSCH may have various methods or other forms. For example, step 603 may also be that the terminal device may determine the scheduling bandwidth of the PUSCH according to the first information and the second information. A set of N PRBs that can be divided, and each PRB set includes the starting position and ending position of the PRB.

In step 603, the terminal device may determine, according to the first information and the second information, the frequency domain granularity of the beamforming manner adopted by the PUSCH. For example, the scheduling bandwidth of PUSCH is divided into N PRGs, and each PRG is used as the frequency domain granularity of the beamforming method. Within the PRG, the same beamforming method is used; different PRGs can use different beamforming methods. . Optionally, the beamforming mode adopted by each PRG is also determined according to the first information and the second information. In a possible implementation manner, each PRG in the above N PRGs corresponds to a frequency hopping bandwidth of the SRS resource. It should be understood that the frequency hopping bandwidth of one PRG corresponding to one SRS refers to: the bandwidth occupied by the PRG of the PUSCH is the same as the frequency hopping bandwidth of the SRS, or the bandwidth occupied by the PRG corresponding to the PUSCH is a subset of the frequency hopping bandwidth of the SRS (that is, the frequency hopping bandwidth of the SRS). The frequency hopping bandwidth contains the PRG of the corresponding PUSCH).

Next, the relationship satisfied by the determined N PRGs will be introduced in detail. In a possible implementation manner, the following relation 1 and/or relation 2 is satisfied between two PRGs in the N PRGs. Relation 1 (taking the adjacent first PRG and second PRG in the frequency domain as an example), the PRB with the lowest frequency in the first PRG and the PRB with the highest frequency in the second PRG respectively correspond to different frequency hopping bandwidths of the SRS resources; The PRG and the second PRG are two adjacent PRGs in the frequency domain in the N PRGs, and the PRB with the lowest frequency in the first PRG and the PRB with the highest frequency in the second PRG are two PRBs adjacent in the scheduling bandwidth of the PUSCH.

Or, the PRB with the highest frequency in the first PRG and the PRB with the lowest frequency in the second PRG respectively correspond to different frequency hopping bandwidths of the SRS resources; wherein the first PRG and the second PRG are two adjacent ones in the frequency domain among the N PRGs PRG, the PRB with the highest frequency in the first PRG and the PRB with the lowest frequency in the second PRG are two adjacent PRBs on the scheduling bandwidth of the PUSCH.

Exemplarily, take the scheduling bandwidth of PUSCH including PRB ₀ , PRB ₁ , PRB ₂ ...... PRB _m as an example, where PRB ₀ , PRB ₁ , PRB ₂ ...... PRB _m is from high to low or from low to low in frequency Arranged in high order. If PRB ₀ is the PRB with the lowest frequency in the scheduling bandwidth of PUSCH, then PRB _m is the PRB with the highest frequency in the scheduling bandwidth of PUSCH; if PRB ₀ is the PRB with the highest frequency in the scheduling bandwidth of PUSCH, then PRB _m is the scheduling bandwidth of PUSCH PRB with the lowest frequency in the middle. Usually, the numbers of PRBs included in the scheduling bandwidth of the PUSCH are consecutive, and two adjacent PRBs refer to two consecutive PRBs. For example, PRB ₀ and PRB ₁ are two adjacent PRBs, and PRB ₁ and PRB ₂ are two consecutive PRBs. two adjacent PRBs, etc. It should be noted that, the above two cases are only different in numbers, and there may be separate ways for the terminal to identify different PRBs. In one embodiment, the numbers of PRBs included in the scheduling bandwidth of PUSCH may also be discontinuous. For example, the scheduling bandwidth of PUSCH includes PRB ₀ , PRB ₂ , PRB ₅ , PRB ₆ . . . Refers to two adjacent PRBs numbered, for example, PRB ₀ and PRB ₂ are two adjacent PRBs, PRB ₂ and PRB ₅ are two adjacent PRBs, and so on.

In order to facilitate the description of the scheme, the scheduling bandwidth of PUSCH includes PRB ₀ , PRB ₁ , PRB ₂ ...... PRB ₇ , PRB ₀ , PRB ₁ , PRB ₂ ...... PRB ₇ is from high to low or from low to low in frequency as follows For example, the order of the highest. Referring to Figure 7a, the first PRG is PRG0, the second PRG is PRG1, the third PRG is PRG2, and the fourth PRG is PRG3, where PRG0 includes PRB ₀ and PRB ₁ , and PRG1 includes PRB ₂ and PRB ₃ , PRG2 includes PRB ₄ and PRB ₅ , and PRG3 includes PRB ₆ and PRB ₇ . If the PRB ₀ , PRB ₁ , PRB ₂ ...... PRB ₇ included in the scheduling bandwidth of the PUSCH are arranged in order of frequency from low to high, the first PRG is PRG1, the second PRG is PRG2, and the PRBs included in PRG1 correspond to The frequency hopping bandwidth 1 of the SRS resource does not correspond to the frequency hopping bandwidth 2 of the SRS resource, that is, the frequency domain of PRG1 overlaps with the frequency hopping bandwidth 1 of the SRS resource but does not overlap the frequency domain of the frequency hopping bandwidth 2 of the SRS resource; The included PRBs all correspond to the frequency hopping bandwidth 2 of the SRS resource but do not correspond to the frequency hopping bandwidth 1 of the SRS resource, that is to say, the PRG2 overlaps with the frequency hopping bandwidth 2 of the SRS resource and does not overlap with the frequency hopping bandwidth 1 of the SRS resource. Domain overlap. If the PRB ₀ , PRB ₁ , PRB ₂ , ... PRB ₇ included in the scheduling bandwidth of the PUSCH are arranged in the order of frequency from high to low, the first PRG is PRG2, the second PRG is PRG1, and PRG1 and PRG2 correspond to SRS resources. For different frequency hopping bandwidths, for the frequency hopping bandwidths of the SRS resources corresponding to PRG1 and PRG2, reference may be made to the foregoing related descriptions, which will not be repeated here.

Relationship 2 (taking the third PRG and the fourth PRG as an example), the third PRG and the fourth PRG correspond to the same frequency hopping bandwidth of the SRS resource, and the third PRG and the fourth PRG correspond to the index of the SRS resource indicated by the second information The third PRG and the fourth PRG are any two PRGs corresponding to the frequency hopping bandwidth of the same SRS resource among the N PRGs. It should be understood that the frequency hopping bandwidth of one SRS resource includes the third PRG and the fourth PRG.

7a, the second information indicates that the indices of the SRS resources are 0 (referred to as SRS resource 0) and 1 (referred to as SRS resource 1); within the frequency hopping bandwidth 1 of the SRS resource, PRG0 is the third PRG and PRG1 is The fourth PRG, PRG0 corresponds to SRS resource 0 indicated by the second information, and PRG1 corresponds to SRS resource 1 indicated by the second information. Within the frequency hopping bandwidth 2 of the SRS resource, PRG2 is the third PRG and PRG3 is the fourth PRG, PRG2 corresponds to SRS resource 0 indicated by the second information, and PRG3 corresponds to SRS resource 1 indicated by the second information. It should be understood that the index of one PRG corresponding to one SRS resource means that the beamforming manner used for transmitting the PUSCH on the PRG is determined according to the index of the corresponding SRS resource. The beamforming mode used by the terminal device to send the SRS on the SRS resource is used to send the PUSCH on the corresponding PRG.

It should be noted that, one of the third PRG and the fourth PRG may be the same as the first PRG or the same as the second PRG. For example, the third PRG is the same as the first PRG, and the fourth PRG is different from the second PRG; for another example, the third PRG is the same as the second PRG, and the fourth PRG is different from the first PRG.

It should be understood that among the four PRGs in the PUSCH shown in FIG. 7a, the first PRG and the second PRG that satisfy the relationship 1 between the two adjacent PRGs in the frequency domain also exist, and there are also the third PRG and the fourth PRG that satisfy the relationship 2. prg. Of course, among the N PRGs in the PUSCH, there may only be the first PRG and the second PRG that satisfy the above relationship 1 between two PRGs that are adjacent in the frequency domain. Please refer to PUSCH3 in Fig. 7b, where PRG0 is the first PRG , PRG1 is the second PRG; among the N PRGs in the PUSCH, there may only be a third PRG and a fourth PRG that satisfy the above relationship 2 between the two PRGs that are adjacent in the frequency domain. See PUSCH4 in FIG. 7b , where, PRG0 is the third PRG, and PRG1 is the fourth PRG. It should be noted that both PRG0 and PRG1 in PUSCH3 correspond to SRS resource 0 indicated by the second indication information, but the frequency hopping bandwidth of the SRS resource corresponding to PRG0 is different from the frequency hopping bandwidth of the SRS resource corresponding to PRG1. PRG0 and PRG1 correspond to different beamforming methods. The frequency hopping bandwidths of the SRS resources corresponding to PRG0 and PRG1 in PUSCH4 are the same, but the second information indicates SRS resource 0 and SRS resource 1. Therefore, PRG0 and PRG1 in PUSCH4 also correspond to different beamforming modes.

In a possible implementation manner, the second information may be SRI. Further, optionally, for the corresponding relationship satisfied between the SRI field indication value and the index of the SRS resource, reference may be made to the relevant descriptions in Table 1 to Table 4 and Table 6 above, which will not be repeated here. That is to say, the indication value of the SRI field may reuse the indication value of the existing SRI indication field (Tables 1 to 4), or a new corresponding relationship (such as Table 6) may be designed according to actual requirements. Taking the above Table 4 as an example, when the SRI field indicator value is 0 to 3, one SRI field indicator value indicates one SRS resource; when the SRI field indicator value is 4 to 14, one SRI field indicator value indicates multiple SRS resources.

Further, optionally, when the number of transmission layers of the PUSCH is limited to 1, the index of the SRS resource indicated by the SRI field indication value corresponds to the PRG one-to-one, and the index of the SRS resource indicated by the SRI field indication value is in descending order. Corresponding to the frequency domain from small to large or from large to small PRG in turn. The number of transmission layers limiting the PUSCH may be predefined by the protocol, or may be indicated by the network device explicitly through signaling or implicitly through other parameters, and the signaling may be RRC signaling or DCI signaling. For example, the network device indicates through RRC signaling that the number of PUSCH transmission layers is limited to 1, then when Table 2 is used and the SRI indication value is 4, SRS resource 0 and SRS resource 1 correspond to different PRGs respectively. Referring to FIG. 7a above, the first PRG and the second PRG correspond to the frequency hopping bandwidth of the same SRS resource. The indices of the SRS resource indicated by the indication value of the SRI field are 0 and 1, the index of the SRS resource being 0 corresponds to the first PRG, and the index of the SRS resource being 1 corresponds to the second PRG. That is, the first PRG corresponds to the first SRS resource indicated by the SRI field indication value, and the second PRG corresponds to the second SRS resource indicated by the SRI field indication value. Compared with the prior art, the index of each SRS resource corresponds to one PRG in sequence, which requires the network device to traverse all combinations and sequences of the indicated multiple SRS resources. For example, when N _SRS = 4, the number of states that the SRI needs to indicate is

kind. With the above method of the present application, there is no problem that the SRS resources indicated by the indication value of the SRI field are the same but in different sequences. Therefore, the SRI field may only indicate the combination of SRS resources without indicating the ordering of the SRS resources.

Step 604, the terminal device determines the beamforming mode of the PUSCH corresponding to each PRG in the N PRGs.

This step 604 is an optional step.

Here, the beamforming manner of the PUSCH corresponding to each PRG can also be understood as the beamforming manner of transmitting the PUSCH on each PRG.

Generally, the SRS resources indicated by the SRI field correspond to a group of candidate beamforming modes, and the number of candidate beamforming modes is the total number of SRS resources that can be indicated multiplied by the number of SRS frequency hopping bandwidths. For example, taking FIG. 7a as an example, a total of 4 SRS resources are configured, and each SRS resource is configured with 4 frequency hopping, then under this configuration, the number of candidate beamforming modes is 16. One SRS resource corresponds to one candidate beamforming mode on one frequency hopping bandwidth. In order to make the determined candidate beamforming mode suitable for uplink channels on different bandwidths, so as to ensure the transmission performance of SRS, for the same SRS The beamforming method used to transmit SRS on different symbols (different frequency hopping bandwidths) of resources, and the terminal equipment can adjust it according to the corresponding bandwidth. That is to say, the terminal device determines beamforming modes respectively on different frequency hopping bandwidths. For example, according to the channel information corresponding to different frequency hopping bandwidths, eigenvector extraction is performed respectively to form different beamforming modes. 2, the candidate beamforming modes corresponding to the same SRS resource on 4 symbols (symbol 1 to symbol 4) can be different, and the beamforming modes adopted by each SRS resource to transmit SRS on 4 symbols are different from each other. same. Exemplarily, the beamforming methods used for SRS resource 1 to transmit SRS on symbols 1 to 4 may be 4 different beamforming methods, and the beamforming methods used for SRS resource 2 to transmit SRS on symbols 1 to 4 The beamforming mode can be 4 different beamforming modes. It can also be understood that the beamforming manners used for the same SRS resource on the four subbands (or called frequency hopping) are different. For example, when the SRI field indicates SRS resource 0, both the first PRG and the second PRG correspond to SRS resource 0, but since the first PRG and the second PRG correspond to different frequency hopping bandwidths of the SRS resource, the first PRG and the second PRG The corresponding beamforming methods are different.

As to how to determine the beamforming mode used on each PRG, the fifth PRG is taken as an example to illustrate, and the fifth PRG is any one of the N PRGs. It should be understood that the fifth PRG may be the same as the first PRG, or the same as the second PRG, or the same as the third PRG, or the same as the fourth PRG.

In a possible implementation manner, the terminal device may determine the first frequency hopping bandwidth of the SRS resource corresponding to the fifth PRG, and further determine the index of the SRS resource corresponding to the fifth PRG according to the SRI field indication value (second information), For example, the SRS resource corresponding to the fifth PRG is called the first SRS resource, and the beamforming mode for sending the PUSCH on the fifth PRG is the beamforming mode for transmitting the first SRS, wherein the beamforming mode for transmitting the first SRS may be The beamforming mode adopted for transmitting the SRS on the first frequency hopping bandwidth of the first SRS resource, that is, the first SRS is carried on the first frequency hopping bandwidth of the first SRS resource. 7a, taking the fifth PRG as an example of PRG3, the first frequency hopping bandwidth corresponding to PRG3 is: the frequency hopping bandwidth of SRS resource 0, SRS resource 1, SRS resource 2 and SRS resource 3 in OFDM symbol 4, and further, The index of PRG3 corresponding to the SRS resource indicated by the second information is 1 (referred to as SRS resource 1), that is to say, the beamforming method for sending PUSCH on PRG3 is: on SRS resource 1 and at the hop corresponding to OFDM symbol 4 The beamforming mode for sending the first SRS over the frequency bandwidth.

Further, optionally, the time domain interval between the transmission of the first SRS and the transmission of the second information is the smallest, for example, the time domain interval between the transmission of the first SRS resource of the first SRS and the time domain of the transmission of the second information is the smallest. Alternatively, it can also be understood that the first SRS resource is an SRS resource corresponding to the time domain of the primary SRS resource with the smallest time domain interval for sending the second information. It should be understood that since the SRS resource configuration may be periodic, that is, SRS may be sent on the same frequency hopping bandwidth in different periods, at this time, for one PRG, it may correspond to multiple beamforming The beamforming modes correspond to the beamforming modes adopted for transmitting SRS on the same frequency hopping bandwidth of the same SRS resource in different periods. At this time, the present application further defines the beamforming mode adopted by the PRG, that is, the first SRS is determined as the SRS in the SRS transmission cycle with the smallest time interval from the time interval at which the SRI indication information is sent. The terminal device determines the beamforming mode adopted by the PRG of the PUSCH according to the beamforming mode adopted by the corresponding SRS in the period.

In the above manner, the beamforming mode for sending PUSCH in different PRGs is determined according to the beamforming mode used for sending SRS on the corresponding SRS resources and the corresponding frequency hopping bandwidth. In this way, the beamforming mode of different PRGs can be ensured. are different, and are more suitable for the channel of uplink transmission, which can improve the transmission performance of PUSCH.

Step 605, the terminal device sends the PUSCH according to the N PRGs. Correspondingly, the network device receives the PUSCH from the terminal device according to the N PRGs.

Here, the terminal device may send the PUSCH to the network device using a corresponding beamforming manner on each PRG determined. It should be understood that the beamforming manners used for transmitting PUSCH and DMRS on one PRG are the same.

It can be seen from the above steps 601 to 605 that the N PRGs corresponding to the scheduling bandwidth of the PUSCH are determined according to the frequency hopping bandwidth of the SRS resources and the index of the SRS resources indicated by the second information. In this way, the determined PRGs can be relatively This ensures that the beamforming mode of each PRG is as optimal as possible without increasing the DCI overhead, thereby improving the transmission performance of the PUSCH.

In the foregoing step 603, the terminal device may determine N PRGs corresponding to the scheduling bandwidth of the PUSCH according to the first information and the second information. The following exemplarily shows a possible implementation manner in which the terminal device determines N PRGs corresponding to the scheduling bandwidth of the PUSCH.

In a possible implementation manner, when the number of transmission layers of the PUSCH is equal to L, the number of the SRS resources indicated by the second indication information is H, and the frequency hopping of the SRS resources corresponding to the scheduling bandwidth of the PUSCH The number (or times) of the bandwidth is K, the N satisfies N=H×K/L, and the H, K and L are all positive integers. The number L of transmission layers of the PUSCH may be determined by the terminal device according to the second information sent by the network device, or may be determined according to other information, or pre-agreed by a protocol. Exemplarily, the protocol pre-agrees: when the number of SRS resources indicated by the second information is less than 4, the number of transmission layers L of PUSCH is equal to 1, and when the number of SRS resources indicated by the second information is equal to 4, the number of transmission layers of PUSCH L is equal to 2. For example, as shown in Table 7 below, when the indicated value of the SRI field is 14, the number of transmission layers of the PUSCH is L=2, otherwise L=1. Alternatively, the protocol pre-stipulates that the number of transmission layers of the current PUSCH is 1. The number of transmission layers L of the PUSCH determined by the terminal device according to the second information sent by the network device may specifically be: the second information additionally indicates the number of transmission layers of the PUSCH. The number of resources also indicates the number of transmission layers of the PUSCH. For example, when the SRI field indicates a value of 4, the network device selects

SRS resources

0 and 1, and indicates L=1. At this time, SRS resource 0 and SRS resource 1 correspond to For two PRGs corresponding to the frequency hopping bandwidth of the same SRS resource, when the SRI field indicates a value of 7, the network device selects

SRS resources

0 and 1, and indicates L=2. At this time, SRS resource 0 and SRS resource 1 are respectively Corresponding to the transmission layers of two PUSCHs corresponding to the frequency hopping bandwidth of the same SRS resource.

In a possible implementation manner, the SRS is sent on each PRB within the frequency hopping bandwidth of the SRS resource, or, within the frequency hopping bandwidth of the SRS resource, the SRS is only sent on some PRBs, and the SRS is not sent on the remaining PRBs. The actual occupied bandwidth can be called the actual frequency hopping bandwidth, see Figure 8. When the actual frequency hopping bandwidth is smaller than the frequency hopping bandwidth of the SRS resource, the beamforming mode for sending the PUSCH on any one of the N PRGs included in the PUSCH is: the beamforming mode for sending the first SRS, where the first SRS The actual frequency hopping bandwidth in the frequency hopping bandwidth of the SRS resource corresponding to the PRG is occupied. In this way, it is helpful to save the SRS resource overhead and improve the reception quality of the SRS.

It should be noted that the network device may configure a threshold value through RRC signaling. The terminal device determines the PRG of the PUSCH according to the relationship between the threshold value and the frequency hopping bandwidth of the SRS resource. Specifically, when the frequency hopping bandwidth of the SRS resource is greater than the threshold value, the PRG of the PUSCH may be determined according to the description of the above embodiment, and details are not repeated here. When the frequency hopping bandwidth of the SRS resource is less than the threshold value, the PRG of the PUSCH can be determined only according to the number of frequency hopping bandwidths of the SRS resource corresponding to the scheduling bandwidth of the PUSCH. At this time, the number of SRS resources indicated by the SRI field is no longer used for determination. PRG is used to indicate the number of transmission layers of PUSCH. For example, the number of SRS resources indicated by the SRI field is equal to the number of transmission layers of PUSCH. That is to say, when the frequency hopping bandwidth of the SRS resource is small (for example, there are only 4 PRBs), at this time, since the PRG of the PUSCH is only determined according to the frequency hopping bandwidth of the SRS resource corresponding to the scheduling bandwidth of the PUSCH, the PRG will also be small. The accuracy indicated by the beamforming method can be met; when the frequency hopping bandwidth of the SRS resource is large, if the PRG is determined only based on the frequency hopping bandwidth of the SRS resource corresponding to the scheduling bandwidth of the PUSCH, the larger PRG will not be able to satisfy the beamforming. Therefore, it is necessary to further divide the PRG according to the number of SRS resources indicated by the SRI, so as to obtain a relatively finer beamforming mode indication accuracy. It should be understood that the above-mentioned threshold value may be a parameter value, and may be the PRG of the PUSCH determined according to the relationship between the frequency modulation bandwidth and the parameter value.

Table 7 Meaning of the SRI field indication value when the maximum number of SRS resources that can be selected is 4

Table 8 Meaning of the SRI field indication value when the maximum number of SRS resources that can be selected is 4

It should be understood that if the protocol pre-agrees that each SRS resource indicated by the SRI field corresponds to a different PUSCH transmission layer, then N=K, at this time, the PRG of each PUSCH corresponds to a different frequency hopping bandwidth of the SRS resource; if The protocol pre-agrees that the number of PUSCH transmission layers=1, then when the SRI field indicates two SRS resources, and the two SRS resources both correspond to the same PUSCH transmission layer, then N=2K.

Referring to the above-mentioned FIG. 7 b, taking the indicated SRS resource corresponding to the transmission layer of one PUSCH as an example (i.e. L=1), the scheduling bandwidth of PUSCH4 overlaps with a frequency hopping bandwidth of the SRS resource, that is, the SRS resource included in the scheduling bandwidth of PUSCH4 The number of frequency hopping bandwidths of PUSCH3 is 1, then K=1; the SRI field indication value=0&1, then H=2; therefore, the number of PRGs included in the scheduling bandwidth of PUSCH3 N=H×K/L=2×1/1 = 2. The scheduling bandwidth of PUSCH3 overlaps with the two frequency hopping bandwidths of the SRS resources, that is, the number of frequency hopping bandwidths of the SRS resources included in the scheduling bandwidth of PUSCH3 is 2, then K=2, and the SRI field indication value=0, then H=1 ; Therefore, the number of PRGs included in the scheduling bandwidth of PUSCH3 is N=H×K/L=2×2/1=2.

With reference to the above Figure 7a, taking the indicated SRS resource corresponding to the transmission layer of one PUSCH as an example (ie L=1), the scheduling bandwidth of PUSCH includes PRB0, PRB1, PRB2, PRB3, PRB4, PRB5, PRB6 and PRB7. The scheduling of PUSCH The number of frequency hopping bandwidths of the SRS resources included in the bandwidth is 2, then K=2, the SRI field indication value=0&1, then H=2, the number of PRGs included in the PUSCH scheduling bandwidth N=H×K/L=2 ×2/1=4.

Further, optionally, the terminal device also needs to determine the starting position and ending position of the PRB included in each PRG in the N PRGs corresponding to the scheduling bandwidth of the PUSCH. Two possible implementations are shown exemplarily as follows.

Implementation manner 1: First determine the PRG set according to the frequency hopping bandwidth of the SRS resources, and then divide each PRG set according to the number H of SRS resources indicated by the second information.

In a possible implementation, it is assumed that the scheduling bandwidth of the PUSCH includes PRB ₀ , PRB ₁ , _{. . .} , PRB _m , which are sequentially arranged in a certain frequency order. The terminal device can sequentially determine whether the current PRB meets the limited conditions from the first PRB ₀ included in the scheduling bandwidth of the PUSCH: PRB _i-1 and PRB _i respectively correspond to frequency hopping bandwidths of different SRS resources. When PRB _i-1 satisfies this restriction, take PRB ₀ to PRB _i-1 as the first PRG set, that is, the first PRG set includes {PRB ₀ , PRB ₁ ,..., PRB _i-1 }; further , starting from PRB _i , judge whether the current PRB satisfies the restriction condition in turn. When PRB _k-1 satisfies the restriction condition, PRB _i to PRB _k-1 are the second PRG set, that is, the second PRG set={PRB _i ,PRB _i+1 ,...,PRB _k-1 }; and so on, until PRB _m is judged. The different frequency hopping bandwidths of the SRS resources corresponding to the last PRB _i-1 in the first PRG set and the first PRB _i in the second PRG set, that is, the last PRB _i in the first PRG set _-1 is the first PRB, and the first PRB _i in the second PRG set is the second PRB. That is to say, starting from the first PRB ₀ included in the scheduling bandwidth of PUSCH, the PRBs included in the scheduling bandwidth of PUSCH are traversed in turn. Divide into a PRG set, and continue to traverse the PRBs until the last PRB _m .

Further, optionally, for each PRG set, each PRG set is further divided according to H, that is, the terminal device can determine the starting position and the ending position of the PRB included in each PRG. In a possible implementation, each PRG set includes a PRBs, then the first PRGs in each PRG set are

PRBs belong to the first PRG, the same as the previous

PRBs next to each other

PRBs belong to the second PRG, and so on; or, the first PRG in each PRG set

PRBs belong to the first PRG, the same as the previous

PRBs next to each other

PRB is the second PRG, and so on, where,

means round up,

Indicates rounded down.

7a, when traversing from the first PRB ₀ to PRB ₃ in sequence, the different frequency hopping bandwidths of the SRS resources corresponding to PRB ₃ and PRB ₄ can be determined, so PRB ₀ to PRB ₃ can be determined as the first PRG Set; and so on, PRB ₄ to PRB ₇ can be determined as the second set of PRGs. Further, optionally, H=2, for the first PRG set, the first 4/2=2 PRBs may be determined as the first PRG, that is, PRG0 includes PRB ₀ and PRB ₁ , and the last two PRBs are determined as The _second PRG, PRG1, includes PRB2 and _PRB3 . For the second set of PRGs, the first 4/2=2 PRBs can be determined as the third PRG, that is, PRG2 includes PRB ₄ and PRB ₅ , and the last 2 PRBs are determined as the fourth PRG, that is, PRG3 includes PRB ₆ and PRB ₇ .

In the second implementation, the start position and the end position of the PRB included in each PRG are directly determined.

In a possible implementation manner, starting from the first PRB ₀ included in the scheduling bandwidth of the PUSCH, the

so far, then

is the first PRG;

is the second PRG, where,

and

Corresponding to different frequency hopping bandwidths of the SRS resources, and so on, until PRB _m , N PRGs corresponding to the scheduling bandwidth of the PUSCH can be determined. Or, starting from the first PRB ₀ of the scheduling bandwidth of PUSCH, accumulate to

so far, then

is the first PRG;

is the second PRG, and so on, until PRB _m , where,

and

Corresponds to different frequency hopping bandwidths of SRS resources.

It should be noted that the superscript of the PRB represents the PRG number, and the subscript represents the number of the PRB within the scheduling bandwidth of the PUSCH. E.g,

The superscript 0 indicates the first PRG, and the subscript 0 indicates the first PRB within the scheduling bandwidth of the PUSCH.

Through the above two implementation manners, each PRG in the N PRGs corresponding to the PUSCH determined by the terminal device only corresponds to the frequency hopping bandwidth of one SRS resource, and each PRG includes consecutively numbered frequency hopping bandwidths.

or

number of PRBs, N _hopping is the number of PRBs included in one frequency hopping bandwidth of the SRS resource, and H represents the number of SRS resources corresponding to one PUSCH transmission layer indicated by the SRI field.

It should be noted that the number of PRBs included in each of the PRG sets divided based on the first and second implementations above is not necessarily the same. The above is only for the convenience of the solution description. The number of PRBs included is the same for the example.

In this application, before the signaling of the DCI (used to carry the second information) for scheduling the PUSCH is issued, the SRS may not be sent on the frequency hopping bandwidth of some SRS resources. This is because when the frequency hopping bandwidth of the SRS resource configured by the network device is small and the system bandwidth is large, only a part of the system bandwidth detection is completed in one SRS transmission cycle, and the detection of the remaining part of the bandwidth is reserved for the subsequent (next) SRS cycle. probe. Alternatively, it may also be because the sounding bandwidth of the configured SRS resource is only a part of the system bandwidth, that is, the PUSCH may be scheduled outside the sounding bandwidth. For example, the PUSCH occupies the 1st to 10th PRBs in the system bandwidth, while the sounding bandwidth of the SRS occupies 5th-20th PRB. For such cases, the beamforming method adopted on the PRB of the PUSCH that does not correspond to the SRS sounding bandwidth, or the PRB of the PUSCH that does not correspond to the frequency hopping bandwidth of any SRS resource is: the beamforming method corresponding to the sixth PRB in the PUSCH The sixth PRB is the PRB of the PUSCH corresponding to the frequency hopping bandwidth of the SRS and adjacent to the PUSCH that does not correspond to the frequency hopping bandwidth of any SRS resource. For example, the 5th to 10th PRBs occupied by PUSCH correspond to the sounding bandwidth of SRS, while the 1st to 4th PRBs do not correspond to the sounding bandwidth of SRS, then the beamforming method adopted by the 1st to 4th PRBs occupied by PUSCH is the same as that of the 1st to 4th PRBs occupied by PUSCH. The 5 PRBs use the same beamforming method. In this way, it can be avoided that the beamforming mode cannot be determined on some PRBs occupied by the PUSCH. At the same time, considering the frequency domain correlation of the channel, the beamforming mode of the PRB occupied by the PUSCH that does not correspond to the frequency hopping bandwidth of the SRS resource is referred to the adjacent The PRB of the PUSCH can improve the performance of the beamforming mode of the PRB occupied by the PUSCH that does not correspond to the frequency hopping bandwidth of the SRS resource.

It should be noted that the network device may configure a threshold value through RRC signaling. The terminal device determines the PRG of the PUSCH according to the relationship between the threshold value and the frequency hopping bandwidth of the SRS resource. Specifically, when the frequency hopping bandwidth of the SRS resource is greater than the threshold value, the PRG of the PUSCH may be determined according to the description of the above embodiment, and details are not repeated here. When the frequency hopping bandwidth of the SRS resource is less than the threshold value, the PRG of the PUSCH can be determined only according to the number of frequency hopping bandwidths of the SRS resource corresponding to the scheduling bandwidth of the PUSCH. At this time, the number of SRS resources indicated by the SRI field is no longer used for determination. PRG is used to indicate the number of transmission layers of PUSCH. For example, the number of SRS resources indicated by the SRI field is equal to the number of transmission layers of PUSCH. That is to say, when the frequency hopping bandwidth of the SRS resource is small (for example, there are only 4 PRBs), at this time, since the PRG of the PUSCH is only determined according to the frequency hopping bandwidth of the SRS resource corresponding to the scheduling bandwidth of the PUSCH, the PRG will also be small. The accuracy indicated by the beamforming method can be met; when the frequency hopping bandwidth of the SRS resource is large, if the PRG is determined only based on the frequency hopping bandwidth of the SRS resource corresponding to the scheduling bandwidth of the PUSCH, the larger PRG will not be able to satisfy the beamforming. Therefore, it is necessary to further divide the PRG according to the number of SRS resources indicated by the SRI, so as to obtain a relatively finer beamforming mode indication accuracy.

In this application, the scheduling bandwidth of the PUSCH may also be configured in a frequency hopping mode. As shown in FIG. 9 , the PUSCH is scheduled by one DCI signaling, and it can also be considered that the PUSCH carries the same transport block. PUSCH may occupy multiple time units (each time unit may include multiple consecutive OFDM symbols), and each time unit corresponds to the same frequency hopping bandwidth of PUSCH, that is, each time unit corresponds to one frequency hopping (hop), which is located in the one PUSCHs on different OFDM symbols in a time unit all occupy the same bandwidth, and PUSCHs located in different time units occupy different bandwidths.

A method in which a network device schedules PUSCH in a frequency hopping mode is as follows: the DCI issued by the network device is used to indicate the PRB position and quantity occupied by the first PUSCH frequency hopping, and the PRB positions and quantity occupied by the remaining PUSCH frequency hopping are based on the pre- The configured offset is determined. For example, if the DCI indicates that the first PUSCH frequency hopping occupies PRB0-PRB10, and the pre-configured offset is 50, then the second PUSCH frequency hopping occupies PRB50-PRB60. In the frequency hopping mode of the PUSCH, the frequency hopping bandwidths of different PUSCHs may correspond to the frequency hopping bandwidths of different SRS resources. For example, in FIG. 9 , hop1 corresponds to the frequency hopping bandwidth of SRS resources in symbol 4, and hop2 corresponds to SRS resources in symbol 2. hopping bandwidth. It should be understood that each hop includes at least one OFDM symbol for carrying a demodulation reference signal (demodulation reference signal, DMRS).

In a possible implementation manner, the terminal device may jointly determine the PRG included in the scheduling bandwidth of the PUSCH according to the frequency hopping bandwidth of the PUSCH and the corresponding frequency hopping bandwidth of the SRS resource. Exemplarily, the terminal device first divides the scheduling bandwidth of the PUSCH into multiple PRG sets according to the frequency hopping bandwidth of the PUSCH, and each frequency hopping bandwidth of the PUSCH corresponds to one PRG set. On each PRG set, the terminal device then determines the PRG according to the frequency hopping bandwidth of the SRS resource, that is, on the frequency hopping of each PUSCH, the solution of the present application is used to determine the PRG independently.

In a possible implementation manner, in one PUSCH scheduling, different information bits of the same transmission block (transmission block, TB) may be carried on the frequency hopping of different PUSCHs. Specifically, the terminal device performs channel coding, modulation and layer mapping operations on the data bits according to the scheduling information to form coded and modulated data symbols, and maps the data symbols to the physical resources in the order of the frequency domain first and then the time domain. Including different PUSCH frequency hopping. In this way, it can be understood that the coded and modulated data symbols are uniformly mapped on multiple frequency hopping resources.

In another possible implementation manner, the frequency hopping of different PUSCH carries all the information bits of the same TB, that is, the same TB is repeatedly transmitted on the frequency hopping of different PUSCH. Specifically, the terminal device performs channel coding, modulation, and layer mapping operations on the data bits according to the scheduling information to form coded and modulated data symbols, and repeatedly maps the data symbols to each PUSCH frequency hopping resource in the order of frequency domain first and then time domain. . In this way, it can be understood that the coded and modulated data symbols are repeatedly mapped on the frequency hopping resources for multiple times.

As shown in FIG. 10 , it is a schematic flowchart of another communication method provided by the present application. In this method, the scheduling bandwidth of the PUSCH is configured as a frequency modulation mode as an example for description. The method includes the following steps:

Step 1001, the network device determines third information.

Here, the third information is used to indicate the frequency hopping bandwidth and frequency hopping times of the PUSCH.

In a possible implementation manner, the network device may configure the frequency hopping bandwidth of the PUSCH for the terminal device. With reference to the above FIG. 9 , the network device may configure multiple PUSCH frequency hopping bandwidths for the terminal device, and each frequency hopping bandwidth corresponds to different time domain resources and frequency domain resources. One implementation of the third information is: indicating the time-frequency resources occupied by the first PUSCH frequency hopping, and the time-frequency resources occupied by the remaining PUSCH frequency hopping according to the time-frequency resources occupied by the first PUSCH frequency hopping and The preset offset is determined.

Exemplarily, the time-frequency resources occupied by the first PUSCH frequency hopping may be indicated by DCI signaling, and the preset offset may be indicated by RRC signaling.

Step 1002, the network device sends third information to the terminal device. Accordingly, the terminal device receives the third information from the network device.

Step 1003, the terminal device may determine M PRGs corresponding to the scheduling bandwidth of the PUSCH according to the third information, where M is a positive integer.

In a possible implementation manner, when the frequency hopping bandwidths of the SRS resources corresponding to each of the M frequency hopping bandwidths included in the scheduling bandwidth of the PUSCH are different, each PRG in the M PRGs is a A frequency hopping bandwidth.

Further, optionally, the number of PRBs occupied by one frequency hopping bandwidth of the PUSCH is the number of PRBs included in the frequency hopping bandwidth of the PUSCH. That is to say, the position of a PRB of one frequency hopping bandwidth of the PUSCH is the position of the PRB of the frequency hopping bandwidth of the PUSCH. For example, one frequency hopping bandwidth of the PUSCH occupies PRB ₀ and PRB ₁ , then the starting PRB of the PRB of the frequency hopping bandwidth of the PUSCH is PRB ₁ , and the ending PRB is PRB ₂ .

When one frequency hopping bandwidth of PUSCH corresponds to multiple frequency hopping bandwidths of SRS resources (such as frequency hopping bandwidth 1 of PUSCH in FIG. 9 ), here, the terminal device needs to further follow the frequency hopping bandwidth of SRS resources indicated by the network device. Determine the PRG. That is, the terminal device can first divide the scheduling bandwidth of the PUSCH into multiple PRG sets according to the frequency hopping bandwidth of the PUSCH. With reference to FIG. 9 , the terminal device can divide the scheduling bandwidth of the PUSCH into two PRG sets, and for each PRG set , and further divide each PRG according to the frequency hopping bandwidth of the corresponding SRS resource. For the specific process, please refer to the above related introduction, that is, the scheduling frequency hopping bandwidth of the PUSCH in the relevant description can be replaced with the corresponding PUSCH frequency hopping bandwidth. It will not be repeated here. For example, when dividing each PRG according to the frequency hopping bandwidth of the SRS resource corresponding to the frequency hopping bandwidth 1 of the PUSCH, the scheduling frequency hopping bandwidth of the PUSCH in the above related description may be replaced by the frequency hopping bandwidth 1 of the PUSCH. That is, the terminal device may also receive first information from the network device, where the first information is used to indicate the frequency hopping bandwidth of the SRS resource.

Further, optionally, the terminal device may also determine the PRG according to the frequency hopping bandwidth of the SRS resource and the index of the SRS resource indicated by the network device. That is, the terminal device can first divide the scheduling bandwidth of the PUSCH into multiple PRG sets according to the frequency hopping bandwidth of the PUSCH. With reference to FIG. 9 , the terminal device can divide the scheduling bandwidth of the PUSCH into two PRG sets, and for each PRG set , and further divide each PRG according to the frequency hopping bandwidth of the corresponding SRS resource and the SRS resource indicated by the SRI field. For the specific process, please refer to the above related introduction, that is, the scheduling frequency hopping bandwidth of the PUSCH in the related description can be replaced with the corresponding PUSCH The frequency hopping bandwidth is sufficient, and details are not repeated here. For example, when dividing each PRG according to the frequency hopping bandwidth of the SRS resource corresponding to the frequency hopping bandwidth 1 of the PUSCH, the scheduling frequency hopping bandwidth of the PUSCH in the above related description can be replaced with the frequency hopping bandwidth 1 of the PUSCH; for another example, According to the same frequency hopping bandwidth of the SRS resource corresponding to the frequency hopping bandwidth 2 of the PUSCH, when each PRG can be further divided according to the SRS resource indicated by the SRI field, the scheduling frequency hopping bandwidth of the PUSCH in the above related description can be replaced The frequency hopping bandwidth 2 of the PUSCH can be used. That is, the terminal device may also receive first information and second information from the network device, where the first information is used to indicate the frequency hopping bandwidth of the SRS resource, and the second information is used to indicate a part of the SRS resource Or the index of all SRS resources.

It should be noted that, to determine the beamforming mode adopted by each PRG in the M PRGs, please refer to the above-mentioned related introduction respectively, and the scheduling frequency hopping bandwidth of PUSCH in the related description can be replaced with the frequency hopping bandwidth of PUSCH, which is not required here. Repeat again.

Step 1004, the terminal device determines the beamforming mode of the PUSCH corresponding to each PRG in the M PRGs according to the frequency hopping bandwidth of the SRS resource corresponding to each frequency hopping bandwidth.

This step 1004 is an optional step.

The seventh PRG is taken as an example to describe the beamforming mode adopted on each of the M PRGs, where the seventh PRG is any one of the M PRGs. In a possible implementation manner, the terminal device may determine the second frequency hopping bandwidth of the SRS resource corresponding to the seventh PRG, and the beamforming manner for sending the PUSCH on the seventh PRG is the beamforming manner for sending the second SRS, The beamforming manner for sending the second SRS is the beamforming manner used for transmitting the SRS on the second frequency hopping bandwidth of the SRS resource.

Further, optionally, the terminal device may determine the index of the SRS resource corresponding to the seventh PRG according to the SRI field indication value (second information), for example, the second SRS resource, and the terminal device may determine the second SRS resource corresponding to the seventh PRG Frequency hopping bandwidth, the beamforming mode for sending the PUSCH on the seventh PRG is the beamforming mode for sending the second SRS, wherein the beamforming mode for sending the second SRS is the second frequency hopping bandwidth of the second SRS resource The beamforming method used to transmit SRS on the

9 , the seventh PRG takes PRG1 in frequency hopping bandwidth 1 of PUSCH as an example, and the second frequency hopping bandwidth corresponding to PRG1 is: SRS resource 0, SRS resource 1, SRS resource 2 and SRS resource 3 in OFDM symbol 4 Frequency hopping bandwidth, further, the index of PRG1 corresponding to the SRS resource indicated by the second information is 0 (referred to as SRS resource 0), that is to say, the beamforming mode for sending PUSCH on PRG0 is: on SRS resource 0 and on A beamforming manner for sending the second SRS on the frequency hopping bandwidth corresponding to OFDM symbol 4.

It should be noted that since the SRS resource configuration can be periodic, that is, SRS may be sent on the same frequency hopping bandwidth in different periods. There are several beamforming modes, and each beamforming mode corresponds to the beamforming mode adopted for sending SRS on the same frequency hopping bandwidth of the same SRS resource in different periods. At this time, the present application further defines the beamforming mode adopted by the PRG, that is, the second SRS is determined as the SRS in the first SRS transmission period with the smallest time interval from the transmission moment of the SRI indication information carried in the second information. The terminal device determines the beamforming mode adopted by the PRG of the PUSCH according to the beamforming mode adopted by the corresponding SRS in the period.

Step 1005, the terminal device sends the PUSCH according to the M PRGs.

For this step 1005, reference may be made to the introduction of the above-mentioned step 1105, which will not be repeated here.

It can be seen from the above steps 1001 to 1005 that the terminal device can determine the M PRGs corresponding to the scheduling bandwidth of the PUSCH according to the third information. In this way, it can ensure that the beamforming mode of each PRG is better, and the PUSCH can obtain frequency diversity gain.

In a possible implementation manner, when the number of transmission layers of the PUSCH is equal to L, the number of the SRS resources indicated by the second indication information is H, and the hopping frequency of the SRS resources corresponding to the frequency hopping bandwidth of the PUSCH is H. The number of frequency bandwidths is P, the number of PRGs corresponding to one frequency hopping bandwidth of the PUSCH satisfies H×P/L, and the H, P and L are all positive integers. The number of transmission layers L of PUSCH may be determined by the terminal device according to the second information sent by the network device, or pre-agreed by the protocol. For details, please refer to the introduction of the number of transmission layers of PUSCH, that is, to replace the scheduling bandwidth of PUSCH with PUSCH The frequency hopping bandwidth is not repeated here.

With reference to the above FIG. 9 , taking the indicated SRS resource corresponding to the transmission layer of one PUSCH as an example (that is, L=1), the frequency hopping bandwidth 1 of the PUSCH overlaps with the two frequency hopping bandwidths of the SRS resource, that is, the frequency hopping bandwidth 1 of the PUSCH If the number of frequency hopping bandwidths of the SRS resources included is 2, then P=2; the SRI field indication value=0, then H=1; therefore, the number of PRGs included in the frequency hopping bandwidth 1 of the PUSCH satisfies H×P/L =1×2/1=2. Frequency hopping bandwidth 2 of PUSCH overlaps with a frequency hopping bandwidth of SRS resources, that is, the number of frequency hopping bandwidths of SRS resources included in frequency hopping bandwidth 2 of PUSCH is 1, then P=1; SRI field indication value=0&1, then H=2, therefore, the number of PRGs included in the frequency hopping bandwidth 2 of the PUSCH satisfies H×P/L=2×1/1=2.

It can be understood that, in order to implement the functions in the foregoing embodiments, the network device and the terminal device include corresponding hardware structures and/or software modules for performing each function. Those skilled in the art should easily realize that the modules and method steps of each example described in conjunction with the embodiments disclosed in the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software-driven hardware depends on the specific application scenarios and design constraints of the technical solution.

Based on the above content and the same concept, FIG. 11 and FIG. 12 are schematic structural diagrams of possible communication apparatuses provided by the present application. These communication apparatuses can be used to implement the functions of the terminal equipment or the network equipment in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments. In this application, the communication device may be the terminal device 102 as shown in FIG. 1 , the network device 101 as shown in FIG. 1 , or a module (such as a chip) applied to the terminal device or the network device.

As shown in FIG. 11 , the communication device 1100 includes a processing module 1101 and a transceiver module 1102 . The communication apparatus 1100 is configured to implement the functions of the terminal device or the network device in the method embodiment shown in FIG. 6 or FIG. 10 .

When the communication apparatus 1100 is used to implement the function of the terminal device in the method embodiment shown in FIG. 6 : the transceiver module 1102 is used to receive first information and second information from the second communication apparatus, where the first information is used to indicate The frequency hopping bandwidth of the sounding reference signal SRS resource, and the second information is used to indicate the index of some or all of the SRS resources in the SRS resource; the processing module 1101 is configured to determine according to the first information and the second information. N PRGs corresponding to the scheduling bandwidth of the physical uplink shared channel PUSCH, where N is a positive integer; the transceiver module 1102 is further configured to send the PUSCH according to the N PRGs.

When the communication apparatus 1100 is used to implement the function of the network device in the method embodiment shown in FIG. 6 : the processing module 1101 is used to determine first information and second information, where the first information is used to indicate a sounding reference signal SRS resource frequency hopping bandwidth, the second information is used to indicate the index of some or all of the SRS resources in the SRS resources; the transceiver module 1102 is used to send the first information and the second information, the first information and the The second information is used to determine N PRGs corresponding to the scheduling bandwidth of the physical uplink shared channel PUSCH, where N is a positive integer.

More detailed descriptions of the above-mentioned processing module 1101 and the transceiver module 1102 can be obtained directly by referring to the relevant descriptions in the method embodiment shown in FIG. 6 , and details are not repeated here.

It should be understood that the processing module 1101 in this embodiment of the present application may be implemented by a processor or a circuit component related to the processor, and the transceiver module 1102 may be implemented by a transceiver or a circuit component related to the transceiver.

Based on the above content and the same concept, as shown in FIG. 12 , the present application further provides a communication apparatus 1200 . The communication device 1200 may include a processor 1201 and a transceiver 1202 . The processor 1201 and the transceiver 1202 are coupled to each other. It can be understood that the transceiver 1202 can be an interface circuit or an input-output interface. Optionally, the communication apparatus 1200 may further include a memory 1203 for storing instructions executed by the processor 1201 or input data required by the processor 1201 to execute the instructions or data generated after the processor 1201 executes the instructions.

When the communication apparatus 1200 is used to implement the method shown in FIG. 6 , the processor 1201 is used to execute the function of the above-mentioned processing module 1101 , and the transceiver 1202 is used to execute the function of the above-mentioned transceiver module 1102 .

When the above communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiments. The terminal device chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal device, and the information is sent by the network device to the terminal device; or, the terminal device chip sends information to other modules (such as a radio frequency module or an antenna) in the terminal device antenna) to send information, the information is sent by the terminal equipment to the network equipment.

When the above communication device is a chip applied to a network device, the network device chip implements the functions of the network device in the above method embodiments. The network device chip receives information from other modules (such as a radio frequency module or an antenna) in the network device, and the information is sent by the terminal device to the network device; or, the network device chip sends information to other modules in the network device (such as a radio frequency module or an antenna). antenna) to send information, the information is sent by the network equipment to the terminal equipment.

When the communication device is a terminal device, FIG. 13 shows a schematic structural diagram of a simplified terminal device. For the convenience of understanding and illustration, in FIG. 13 , the terminal device is a mobile phone as an example. As shown in FIG. 13 , the terminal device 1300 includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is mainly used to process the communication protocol and communication data, control the entire terminal device, execute software programs, and process data of the software programs, for example, to support the terminal device 1300 to execute any of the above-mentioned embodiments by the terminal device. Methods. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal equipment may not have input and output devices.

When the terminal device is powered on, the processor can read the software program in the memory, interpret and execute the instructions of the software program, and process the data of the software program. When it is necessary to send data, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves. When data is sent to the terminal device 1300, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data .

As an optional implementation manner, the processor may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data, and the central processing unit is mainly used to control the entire terminal device 1300. The software program is executed, and the data of the software program is processed. The processor in FIG. 13 integrates the functions of the baseband processor and the central processing unit. It should be noted that the baseband processor and the central processing unit may also be independent processors, which are interconnected through technologies such as a bus. In addition, the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device 1300 may include multiple central processors to enhance its processing capability, and various components of the terminal device 1300 may be connected through various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and communication data may be built in the processor, or may be stored in the storage module in the form of a software program, and the processor executes the software program to realize the baseband processing function.

In this application, the antenna and radio frequency circuit with a transceiver function can be regarded as the transceiver module of the terminal equipment, and the processor with the processing function can be regarded as the processing module of the terminal equipment. As shown in FIG. 13 , the terminal device includes a processing module 1301 and a transceiver module 1302 . The transceiver module may also be referred to as a transceiver, a transceiver, a transceiver device, and the like, and the processing module may also be referred to as a processor, a processing board, a processing unit, a processing device, and the like. Optionally, the device used for implementing the receiving function in the transceiver module may be regarded as a receiving module, and the device used for implementing the transmitting function in the transceiver module may be regarded as a transmitting module, that is, the transceiver module includes a receiving module and a transmitting module. Exemplary, The receiving module may also be called a receiver, a receiver, a receiving circuit, and the like, and the sending module may be called a transmitter, a transmitter, or a transmitting circuit, and the like.

On the downlink, the downlink signal (including data and/or control information) sent by the network device is received through the antenna, and on the uplink, the uplink signal (including data) is sent to the network device or other terminal equipment through the antenna. and/or control information), in the processor, the service data and signaling messages are processed, and these modules are based on the radio access technology adopted by the radio access network (for example, LTE, NR and other evolved system access technologies) to be processed. The processor is further configured to control and manage the actions of the terminal device, and to execute the processing performed by the terminal device in the above-mentioned embodiment. The processor is further configured to support the terminal device to execute the execution method involving the terminal device in FIG. 6 .

It should be noted that FIG. 13 only shows one memory, one processor and one antenna. In an actual terminal device, the terminal device may contain any number of antennas, memories, processors, and the like. The memory may also be referred to as a storage medium or a storage device or the like. In addition, the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.

It should be understood that the transceiver module 1302 is configured to perform the sending and receiving operations on the terminal device side in the method embodiment shown in FIG. 6 above, and the processing module 1301 is configured to perform the sending and receiving operations on the terminal device side in the method embodiment shown in FIG. 6 above. operations other than operations. For example, the transceiving module 1302 is configured to perform the transceiving steps on the terminal device side in the embodiment shown in FIG. 6 , such as step 605 . The processing module 1301 is configured to perform other operations on the side of the terminal device in the embodiment shown in FIG. 6 except for the transceiving operation, such as step 603 and step 604 .

When the communication device is a chip-type device or circuit, the communication device may include a transceiver module and a processing module. Wherein, the transceiver module may be an input/output circuit and/or an interface circuit; the processing module may be a processor, a microprocessor or an integrated circuit integrated on the chip.

When the communication apparatus is a network device, FIG. 14 exemplarily shows a schematic structural diagram of a network device provided by the present application. As shown in FIG. 14 , the network device 1400 may include one or more radio frequency units, such as a remote radio unit (remote radio unit, RRU) 1402 and one or more baseband units (baseband unit, BBU) 1401. The RRU 1402 may be referred to as a transceiver module, a transceiver, a transceiver circuit, or a transceiver, etc., and may include at least one antenna 14021 and a radio frequency unit 14022 . The RRU1402 part is mainly used for the transceiver of radio frequency signals and the conversion of radio frequency signals and baseband signals. The BBU1401 part can be called a processing module, a processor, etc. It is mainly used for baseband processing, such as channel coding, multiplexing, modulation, spread spectrum, etc., and is also used to control network equipment. The RRU 1402 and the BBU 1401 may be physically set together; they may also be physically separated, that is, a distributed network device.

The BBU 1401 is the control center of the base station, and can also be called a processing module, which can correspond to the processing module 1201 in FIG. 12 , and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum, and the like. For example, the BBU (processing module) may be used to control the base station to perform the operation procedure of the network device in the above method embodiments, for example, to determine the first information and the second information.

As an optional implementation, the BBU1401 can be composed of one or more boards. Multiple boards can jointly support a wireless access network (such as LTE network) of a single access standard, or can support different access standards respectively. wireless access network (such as LTE network, 5G network or other networks). The BBU 1401 also includes a memory 14012 and a processor 14011. Memory 14012 is used to store necessary instructions and data. The processor 14011 is configured to control the network device to perform necessary actions, for example, to control the network device to perform the method performed by the network device in any of the foregoing embodiments. Memory 14012 and processor 14011 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits are also provided on each single board.

On the uplink, the uplink signal (including data, etc.) sent by the terminal device is received through the antenna 14021, and on the downlink, the downlink signal (including data and/or control information) is sent to the terminal device through the antenna 14021. , in the processor 14011, the service data and signaling messages are processed, and these modules are processed according to the radio access technology adopted by the radio access network (eg, LTE, NR, and other access technologies of evolved systems). The processor 14011 is further configured to control and manage the actions of the network device, and is configured to execute the processing performed by the network device in the foregoing embodiments. The processor 14011 is further configured to support the network device to perform the method performed by the network device in FIG. 6 .

It should be noted that FIG. 14 only shows a simplified design of the network device. In practical applications, a network device may include any number of antennas, memories, processors, radio frequency units, RRUs, BBUs, etc., and all network devices that can implement the present application are within the protection scope of the present application.

It should be understood that the transceiver module 1402 is configured to perform the sending and receiving operations on the network device side in the method embodiment shown in FIG. 6 above, and the processing module 1401 is configured to perform the network device side in the method embodiment shown in FIG. 6 above. operations other than operations. For example, the transceiving module 1402 is configured to perform transceiving steps on the network device side in the embodiment shown in FIG. 6 , such as step 602 . The processing module 1401 is configured to perform other operations on the network device side in the embodiment shown in FIG. 6 except for the transceiving operation, for example, step 601 .

It can be understood that the processor in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), application-specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. A general-purpose processor may be a microprocessor or any conventional processor.

The method steps in the embodiments of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions. Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (programmable ROM) , PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically erasable programmable read-only memory (electrically EPROM, EEPROM), registers, hard disks, removable hard disks, CD-ROMs or known in the art in any other form of storage medium. An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage medium may reside in an ASIC. Alternatively, the ASIC may be located in a network device or in an end device. Of course, the processor and the storage medium may also exist in the network device or the terminal device as discrete components.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable apparatus. The computer program or instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions may be downloaded from a website site, computer, A server or data center transmits by wire or wireless to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server, data center, or the like that integrates one or more available media. The usable medium can be a magnetic medium, such as a floppy disk, a hard disk, and a magnetic tape; it can also be an optical medium, such as a digital video disc (DVD); it can also be a semiconductor medium, such as a solid state drive (solid state drive). , SSD).

In the various embodiments of the present application, if there is no special description or logical conflict, the terms and/or descriptions between different embodiments are consistent and can be referred to each other, and the technical features in different embodiments are based on their inherent Logical relationships can be combined to form new embodiments.

In this application, "at least one" means one or more, and "plurality" means two or more. "And/or", which describes the association relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, which can indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural. In the text description of this application, the character "/" generally indicates that the related objects are a kind of "or" relationship; in the formula of this application, the character "/" indicates that the related objects are a kind of "division" Relationship. Also, in this application, the word "exemplary" is used to mean serving as an example, illustration, or illustration. Any embodiment or design described in this application as "exemplary" should not be construed as preferred or advantageous over other embodiments or designs. Alternatively, it can be understood that the use of the word example is intended to present concepts in a specific manner, and not to limit the application.

It can be understood that, various numbers and numbers involved in the embodiments of the present application are only used to distinguish for convenience of description, and are not used to limit the scope of the embodiments of the present application. The size of the sequence numbers of the above processes does not imply the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic. The terms "first", "second" and similar expressions are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion, eg, comprising a series of steps or modules. A method, system, product or device is not necessarily limited to those steps or modules expressly listed, but may include other steps or modules not expressly listed or inherent to the process, method, product or device.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the protection scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

A communication method, comprising:

The first communication device receives first information and second information from the second communication device, where the first information is used to indicate the frequency hopping bandwidth of the sounding reference signal SRS resource, and the second information is used to indicate that the SRS resource is in the SRS resource. an index of some or all of the SRS resources;

The first communication device determines, according to the first information and the second information, N precoding resource block groups PRG corresponding to the scheduling bandwidth of the physical uplink shared channel PUSCH, where N is a positive integer;

The first communication apparatus transmits the PUSCH according to the N PRGs.
The method of claim 1, wherein each PRG in the N PRGs corresponds to a frequency hopping bandwidth of the SRS resource.
The method according to claim 1 or 2, wherein the PRB with the lowest frequency in the first PRG and the PRB with the highest frequency in the second PRG respectively correspond to different frequency hopping bandwidths of the SRS resource;

The first PRG and the second PRG are two adjacent PRGs in the frequency domain among the N PRGs, the PRB with the lowest frequency in the first PRG and the PRB with the highest frequency in the second PRG are two adjacent PRBs on the scheduling bandwidth of the PUSCH.
The method according to claim 1 or 2, wherein the PRB with the highest frequency in the first PRG and the PRB with the lowest frequency in the second PRG respectively correspond to different frequency hopping bandwidths of the SRS resource;

The first PRG and the second PRG are two adjacent PRGs in the frequency domain among the N PRGs, and the PRB with the highest frequency in the first PRG and the PRB with the lowest frequency in the second PRG are two adjacent PRBs on the scheduling bandwidth of the PUSCH.
The method according to any one of claims 1 to 4, wherein the third PRG and the fourth PRG correspond to the same frequency hopping bandwidth of the SRS resource, and the third PRG and the fourth PRG correspond to The indices of the SRS resources indicated by the second information are different;

Wherein, the third PRG and the fourth PRG are any two PRGs among the N PRGs.
The method according to any one of claims 1 to 5, wherein the method further comprises:

The first communication device determines the first frequency hopping bandwidth of the SRS resource corresponding to the fifth PRG, and the beamforming mode for transmitting the PUSCH on the fifth PRG is the beamforming mode for transmitting the first SRS, Wherein, the fifth PRG is any one of the N PRGs;

The first SRS is carried on the first frequency hopping bandwidth of the first SRS resource, and the index of the first SRS resource is the resource index of part or all of the SRS indicated by the second information.
The method according to claim 6, wherein the transmission of the first SRS is an SRS transmission with the smallest time domain interval from sending the second information.
The method according to any one of claims 1 to 7, wherein the second information comprises a sounding reference signal indication SRI.
The method according to any one of claims 1 to 8, wherein when the number of transmission layers of the PUSCH is equal to L, the N satisfies H×K/L, and the H is an indication of the second indication information The number of the SRS resources, the K is the number of frequency hopping bandwidths of the SRS resources corresponding to the scheduling bandwidth of the PUSCH, and the H, K and L are all positive integers.
A communication device, comprising:

a transceiver module, configured to receive first information and second information from a second communication device, where the first information is used to indicate a frequency hopping bandwidth of a sounding reference signal SRS resource, and the second information is used to indicate the SRS resource The index of some or all of the SRS resources in the middle;

a processing module, configured to determine, according to the first information and the second information, N precoding resource block groups PRG corresponding to the scheduling bandwidth of the physical uplink shared channel PUSCH, where N is a positive integer

The transceiver module is further configured to send the PUSCH according to the N PRGs.
The communication apparatus according to claim 10, wherein each PRG in the N PRGs corresponds to a frequency hopping bandwidth of the SRS resource.
The communication device according to claim 10 or 11, wherein the PRB with the lowest frequency in the first PRG and the PRB with the highest frequency in the second PRG respectively correspond to different frequency hopping bandwidths of the SRS resource;

The first PRG and the second PRG are two adjacent PRGs in the frequency domain among the N PRGs, the PRB with the lowest frequency in the first PRG and the PRB with the highest frequency in the second PRG are two adjacent PRBs on the scheduling bandwidth of the PUSCH.
The communication device according to claim 10 or 11, wherein the PRB with the highest frequency in the first PRG and the PRB with the lowest frequency in the second PRG respectively correspond to different frequency hopping bandwidths of the SRS resource;

The first PRG and the second PRG are two adjacent PRGs in the frequency domain among the N PRGs, and the PRB with the highest frequency in the first PRG and the PRB with the lowest frequency in the second PRG are two adjacent PRBs on the scheduling bandwidth of the PUSCH.
The communication device according to any one of claims 10 to 13, wherein the third PRG and the fourth PRG correspond to the same frequency hopping bandwidth of the SRS resource, and the third PRG and the fourth PRG The indices corresponding to the SRS resources indicated by the second information are different;

Wherein, the third PRG and the fourth PRG are any two PRGs among the N PRGs.
The communication device according to any one of claims 10 to 14, wherein the communication device processing module is further configured to:

Determine the first frequency hopping bandwidth of the SRS resource corresponding to the fifth PRG, and the beamforming mode for sending the PUSCH on the fifth PRG is the beamforming mode for sending the first SRS, wherein the fifth PRG PRG is any one of the N PRGs;

The first SRS is carried on the first frequency hopping bandwidth of the first SRS resource, and the index of the first SRS resource is the resource index of part or all of the SRS indicated by the second information.
The communication apparatus according to claim 15, wherein the transmission of the first SRS is an SRS transmission with the smallest time domain interval from sending the second information.
The communication apparatus according to any one of claims 10 to 16, wherein the second information comprises a sounding reference signal indication SRI.
The communication device according to any one of claims 10 to 17, wherein when the number of transmission layers of the PUSCH is equal to L, the N satisfies H×K/L, and the H is the second indication information The indicated number of the SRS resources, the K is the number of frequency hopping bandwidths of the SRS resources corresponding to the scheduling bandwidth of the PUSCH, and the H, K and L are all positive integers.
A communication device, characterized in that it includes a processor and a transceiver, and the transceiver is configured to receive signals from other communication devices other than the communication device and transmit to the processor or transmit signals from the processor. The signal is sent to other communication devices than the communication device, and the processor is used to implement the method according to any one of claims 1 to 9 by means of logic circuits or executing code instructions.
A computer-readable storage medium, characterized in that, the computer-readable storage medium stores a computer program or instruction, and when the computer program or instruction is executed by a communication device, the communication device is made to perform as claimed in claim 1. The method of any one of to 9.
A computer program product, characterized in that the computer program product includes a computer program or instruction, which, when the computer program or instruction is executed by a communication device, causes the communication device to execute any one of claims 1 to 9 the method described.