WO2024041212A1 - Communication method and apparatus - Google Patents

Abstract

A communication method and apparatus. The method comprises: a terminal device receiving first indication information from a network device, wherein the first indication information is used for indicating the total number of space-domain bases respectively corresponding to a plurality of transmitting and receiving points (TRPs) participating in cooperation; the terminal device determining a first group of numerical values, wherein each numerical value in the first group of numerical values is the number of space-domain bases corresponding to each TRP among the plurality of TRPs, and the sum of the numerical values in the first group of numerical values is equal to the total number of space-domain bases; and the terminal device sending second indication information to the network device, wherein the second indication information is used for indicating the first group of numerical values. By means of the method, when a terminal device reports, to a network device, the number of space-domain bases corresponding to each TRP among a plurality of TRPs participating in cooperation, a first group of numerical values may be reported, and it is unnecessary to separately report, to the network device, the number of space-domain bases corresponding to each TRP among the plurality of TRPs participating in cooperation, such that the reporting overhead of the terminal device can be reduced.

Description

A communication method and device

This application claims priority to the Chinese patent application filed with the China Patent Office on August 22, 2022, with the application number 202211008186.6 and the application title "A communication method and device", the entire content of which is incorporated into this application by reference.

Technical field

The present application relates to the field of communication, and more specifically, to a communication method and device.

Background technique

The 5th generation (5G) communication system has higher requirements for system capacity, spectrum efficiency, etc. In this scenario, network equipment often needs to obtain channel state information (channel state information) of uplink channels and downlink channels. , CSI) to further ensure the performance of the system.

In a frequency-division duplexing (FDD) system, there is a large frequency interval between the uplink channel and the downlink channel, and the uplink channel and the downlink channel are not completely reciprocal, and the network equipment cannot pass the uplink channel. Channel estimation is used to obtain the complete downlink channel. At this time, the terminal device needs to report the CSI of the downlink channel to the network device, so that the network device can reconstruct the downlink channel based on the CSI of the downlink channel. The CSI of the downlink channel includes transmission and reception. The number of airspace bases corresponding to points (transmitting and receiving points, TRP). However, in the coherent joint transmission (CJT) cooperation mode, the terminal device needs to separately report to the network device the number of airspace bases corresponding to each of the multiple TRPs participating in the collaboration, thus increasing the reporting overhead of the terminal device .

Contents of the invention

This application provides a communication method and device that eliminates the need to separately report to the network device the number of airspace bases corresponding to each TRP in multiple TRPs participating in the collaboration, thereby reducing the reporting overhead of the terminal device.

In the first aspect, this application provides a communication method. The execution subject of the method may be a terminal device or a chip applied in the terminal device. The following description takes the execution subject being a terminal device as an example.

The method may include: the terminal device receives first indication information from the network device, the first indication information is used to indicate the total number of airspace bases corresponding to each of the multiple transmission reception points TRP participating in the cooperation; the terminal device determines the first set of values, Each value in a set of values is the number of airspace bases corresponding to each TRP in the plurality of TRPs. The sum of each value in the first set of values is equal to the total number of airspace bases; the terminal device sends the second instruction information to the network device, and the second The indication information is used to indicate the first set of values.

Based on the above technical solution, the terminal device can send second indication information to the network device. The second indication information is used to indicate the first set of values. Therefore, after receiving the second indication information, the network device can determine which of the multiple TRPs participating in the collaboration. The number of airspace bases corresponding to each TRP. Through this method, when the terminal device reports to the network device the number of airspace bases corresponding to each TRP in the multiple TRPs participating in the collaboration, it can report the first set of values, and there is no need to separately report to the network device the number of airspace bases in the multiple TRPs participating in the collaboration. The number of airspace bases corresponding to each TRP can reduce the reporting overhead of terminal equipment.

In conjunction with the first aspect, in some implementations of the first aspect, the terminal device determines the first set of values, including: the terminal device determines the first set of values based on at least one set of codebook parameters, and the at least one set of codebook parameters Each set of codebook parameters includes the number of spatial bases.

In this way, the first set of values can be determined based on at least one set of codebook parameters (such as the codebook parameters in the R18 CJT codebook), thereby reducing the airspace corresponding to each TRP among the multiple TRPs that the terminal device can freely choose to participate in collaboration. Possible ways to determine the number of bases to further control the reporting overhead of terminal devices.

In conjunction with the first aspect, in some implementations of the first aspect, the second indication information includes a first index, and the first index is associated with the first set of numerical values.

Based on the above technical solution, the terminal device sends the first index to the network device, so that the network device determines the number of airspace bases corresponding to each of the multiple TRPs participating in the cooperation. Through this method, when the terminal device reports to the network device the number of airspace bases corresponding to each TRP among the multiple TRPs participating in the collaboration, it can report the first index associated with the first set of values, and there is no need to report the number of airspace bases to the network device. The network device independently reports the number of airspace bases corresponding to each TRP in the multiple TRPs participating in the collaboration, thereby reducing the reporting overhead of the terminal device.

In conjunction with the first aspect, in some implementations of the first aspect, the second indication information includes a bitmap, and the bitmap is associated with an index corresponding to each value in the first set of values.

Based on the above technical solution, the terminal device sends a bitmap to the network device, so that the network device determines the number of airspace bases corresponding to each of the multiple TRPs participating in the cooperation. Through this method, when the terminal device reports to the network device the number of airspace bases corresponding to each TRP in the multiple TRPs participating in the collaboration, it can report the bitmap associated with the index corresponding to each value in the first group of values, and there is no need to The number of airspace bases corresponding to each TRP among the multiple TRPs participating in the collaboration is independently reported to the network device, thereby reducing the reporting overhead of the terminal device.

In conjunction with the first aspect, in some implementations of the first aspect, the number of bitmaps is equal to the number of groups of at least one set of codebook parameters, and each set of codebook parameters in the at least one set of codebook parameters includes the number of spatial bases. .

With reference to the first aspect, in some implementations of the first aspect, the second indication information includes a combination number, and the combination number is associated with an index corresponding to each value in the first set of values.

Based on the above technical solution, the terminal device sends the combination number to the network device, so that the network device determines the number of airspace bases corresponding to each of the multiple TRPs participating in the cooperation. Through this method, when the terminal device reports to the network device the number of airspace bases corresponding to each TRP in the multiple TRPs participating in the collaboration, it can report the number of combinations associated with the index corresponding to each value in the first set of values, and there is no need to The number of airspace bases corresponding to each TRP among the multiple TRPs participating in the collaboration is independently reported to the network device, thereby reducing the reporting overhead of the terminal device.

In conjunction with the first aspect, in some implementations of the first aspect, the number of digits of the combination number is determined based on the number of groups of at least one set of codebook parameters and the number of multiple TRPs, and each group of at least one set of codebook parameters Codebook parameters include the number of spatial bases.

In connection with the first aspect, in some implementations of the first aspect, the first indication information is also used to indicate the number of frequency domain bases corresponding to each TRP in the plurality of TRPs, where the number of frequency domain bases corresponding to each TRP in the plurality of TRPs is The number of frequency domain bases is the same.

In the second aspect, this application provides a communication method. The execution subject of the method may be a terminal device or a chip applied in the terminal device. The following description takes the execution subject being a terminal device as an example.

The method may include: the terminal device receives a second index from the network device, the second index is used to indicate a combination of indexes of codebook parameters corresponding to each TRP of the N transmission reception points TRP; the terminal device determines according to the second index The index of the codebook parameter corresponding to each TRP among the Q TRPs participating in the collaboration. The N TRPs include Q TRPs. The index of the codebook parameter corresponding to each TRP among the Q TRPs is the first Q codes included in the second index. The index of this parameter, where N and Q are positive integers.

Based on the above technical solution, the terminal device can determine the codebook parameters corresponding to each of the Q TRPs participating in the collaboration according to the second index, thereby reducing the processing complexity of the terminal device.

In the third aspect, this application provides a communication method. The execution subject of the method may be a terminal device or a chip applied in the terminal device. The following description takes the execution subject being a terminal device as an example.

The method may include: the terminal device receives third indication information from the network device, and the third indication information is used to indicate the proportion of all non-zero combination coefficients corresponding to the multiple transmission reception points TRP participating in the cooperation to all combination coefficients; the terminal device determines The second set of values. Each value in the second set of values is the proportion of the non-zero combination coefficient corresponding to each TRP in multiple TRPs to the combination coefficient. The sum of each value in the second set of values is equal to the proportion of all non-zero combination coefficients to all The proportion of the combination coefficient; the terminal device sends fourth indication information to the network device, and the fourth indication information is used to indicate the second set of values.

Based on the above technical solution, the terminal device can send fourth indication information to the network device. The fourth indication information is used to indicate the second set of values. Therefore, after receiving the fourth indication information, the network device can determine which of the multiple TRPs participating in the collaboration. The non-zero combination coefficient corresponding to each TRP accounts for the proportion of the combination coefficient. Through this method, when the terminal device reports to the network device the proportion of the non-zero combination coefficient corresponding to each TRP in the multiple TRPs participating in the collaboration, it can report the second set of values, and there is no need to separately report the collaboration to the network device. The non-zero combination coefficient corresponding to each TRP in multiple TRPs accounts for the proportion of the combination coefficient, thereby reducing the reporting overhead of the terminal device.

Combined with the third aspect, in some implementations of the third aspect, the terminal device determines the second set of values, including: the terminal device determines the second set of values based on at least one set of codebook parameters, and the terminal device determines the second set of values in the at least one set of codebook parameters. Each set of codebook parameters includes the proportion of non-zero combination coefficients to combination coefficients.

In this way, the second set of values can be determined based on at least one set of codebook parameters (such as the codebook parameters in the R18 CJT codebook), from Possible ways to reduce the number of airspace bases corresponding to each TRP among multiple TRPs participating in collaboration can be reduced by the terminal device, thereby further controlling the reporting overhead of the terminal device.

In conjunction with the third aspect, in some implementations of the third aspect, the fourth indication information includes a bitmap, and the bitmap is associated with an index corresponding to each value in the second set of values.

Based on the above technical solution, the terminal device can send a bitmap to the network device, and the bitmap is associated with the index corresponding to each value in the second set of values, so that after the network device receives the bitmap, it can determine participation based on the bitmap. The proportion of the non-zero combination coefficient corresponding to each TRP in the multiple coordinated TRPs to the combination coefficient. Through this method, when the terminal device reports to the network device the proportion of the non-zero combination coefficient corresponding to each TRP in the multiple TRPs participating in the collaboration, it can report the bitmap, and there is no need to separately report the collaboration to the network device. The non-zero combination coefficient corresponding to each TRP in the multiple TRPs accounts for the proportion of the combination coefficient, thereby reducing the reporting overhead of the terminal device.

In conjunction with the third aspect, in some implementations of the third aspect, the number of bitmaps is equal to the number of groups of at least one set of codebook parameters, and each set of codebook parameters in the at least one set of codebook parameters includes a non-zero combination coefficient. Proportion of the combination coefficient.

Combined with the third aspect, in some implementations of the third aspect, the fourth indication information includes a combination number, and the combination number is associated with an index corresponding to each value in the second set of values.

Based on the above technical solution, the terminal device can send a combination number to the network device, and the combination number is associated with the index corresponding to each value in the second set of values. Therefore, after the network device receives the combination number, it can determine the participation based on the combination number. The proportion of the non-zero combination coefficient corresponding to each TRP in the multiple coordinated TRPs to the combination coefficient. Through this method, when the terminal device reports to the network device the proportion of the non-zero combination coefficient corresponding to each TRP in the multiple TRPs participating in the collaboration, it can report the number of combinations, and there is no need to separately report to the network device the number of combinations participating in the collaboration. The non-zero combination coefficient corresponding to each TRP in the multiple TRPs accounts for the proportion of the combination coefficient, thereby reducing the reporting overhead of the terminal device.

Combined with the third aspect, in some implementations of the third aspect, the number of digits of the combination number is determined based on the number of groups of at least one set of codebook parameters and the number of multiple TRPs, and each group of at least one set of codebook parameters The codebook parameters include the ratio of non-zero combination coefficients to combination coefficients.

In conjunction with the third aspect, in some implementations of the third aspect, the third indication information is also used to indicate the number of frequency domain bases corresponding to each TRP in the plurality of TRPs, where the number of frequency domain bases corresponding to each TRP in the plurality of TRPs is The number of frequency domain bases is the same.

In the fourth aspect, this application provides a communication method. The execution subject of the method may be a terminal device or a chip applied in the terminal device. The following description takes the execution subject being a terminal device as an example.

The method may include: the terminal device receives fifth indication information from the network device, the fifth indication information is used to indicate the total number of airspace bases and the total number of airspace bases corresponding to each of the multiple transmission reception points TRP participating in the cooperation, where, , is Positive integer; when the terminal device determines the number of airspace bases corresponding to each TRP in multiple TRPs, the number of bits used is; the number of bits the terminal device sends to the network device.

Based on the above technical solution, the terminal device can send a number of bits to the network device, so that after the network device receives the number of bits, it can determine the number of airspace bases corresponding to each of the multiple TRPs participating in the cooperation based on the number of bits. Through this method, when the terminal device reports the number of airspace bases corresponding to each TRP in multiple TRPs to the network device, it can report the number of bits, and there is no need to separately report the number of airspace bases corresponding to each TRP in multiple TRPs to the network device. , thereby reducing the reporting overhead of the terminal device.

In a fifth aspect, this application provides a communication method. The execution subject of the method may be a network device or a chip applied in the network device. The following description takes the execution subject being a network device as an example.

The method may include: the network device determines a first set of values, where each value in the first set of values is the number of airspace bases corresponding to each TRP of multiple transmission reception points TRP participating in the collaboration; the network device sends a second set of values to the terminal device. Indication information, the second indication information is used to indicate the first set of values.

Based on the above technical solution, the network device can determine the first set of values and send the first set of values to the terminal device. Through this method, it can be ensured that the reserved overhead of the network device will not be wasted, and the terminal device can determine the partners participating in the collaboration based on the first set of values after obtaining the first set of values without sending the first set of values to the network device. The number of airspace bases corresponding to each TRP in multiple TRPs can report codebook structure information to the network device, such as indication information corresponding to the airspace selection matrix, indication information corresponding to the frequency domain compression matrix, and non-zero combinations in the combination coefficients. Coefficients and other parameters further reduce the complexity of terminal device processing and reporting overhead.

Combined with the fifth aspect, in some implementations of the fifth aspect, the network device determines the first set of values, including: the network device determines the first set of values based on at least one set of codebook parameters, and the network device determines the first set of values in the at least one set of codebook parameters. Each set of codebook parameters includes the number of spatial bases.

Combined with the fifth aspect, in some implementations of the fifth aspect, the second indication information includes a first index, the first index and the first group Numerical values are associated.

In conjunction with the fifth aspect, in some implementations of the fifth aspect, the second indication information includes a bitmap, and the bitmap is associated with an index corresponding to each value in the first set of values.

Combined with the fifth aspect, in some implementations of the fifth aspect, the number of bitmaps is equal to the number of sets of at least one set of codebook parameters, and each set of codebook parameters in the at least one set of codebook parameters includes the number of spatial bases. .

In conjunction with the fifth aspect, in some implementations of the fifth aspect, the second indication information includes a combination number, and the combination number is associated with an index corresponding to each value in the first set of values.

Combined with the fifth aspect, in some implementations of the fifth aspect, the number of digits of the combination number is determined based on the number of groups of at least one set of codebook parameters and the number of multiple TRPs, and each group of at least one set of codebook parameters Codebook parameters include the number of spatial bases.

In a sixth aspect, the present application provides a communication method. The execution subject of the method may be a network device or a chip applied in the network device. The following description takes the execution subject being a network device as an example.

The method may include: the network device determines a second index according to the indexes of M groups of codebook parameters, and the second index is used to indicate a combination of indexes of codebook parameters corresponding to each TRP of the N transmission reception points TRP, where M , N is a positive integer, and N is less than or equal to M; the network device sends the second index to the terminal device.

Based on the above technical solution, the network device can send a second index to the terminal device. The second index is used to indicate a combination of indexes of the codebook parameters corresponding to each TRP in the N TRPs, so that the terminal device receives the second index. Finally, the codebook parameters corresponding to each TRP in the N TRPs can be obtained. Through this method, when the network device indicates to the terminal device the codebook parameters corresponding to each TRP in the N TRPs, it can send the second index to the terminal device. The network device does not need to separately indicate to the terminal device the codebook parameters in the N TRPs. Each TRP has its own corresponding codebook parameters, thereby reducing the instruction overhead of the network device.

Combined with the sixth aspect, in some implementations of the sixth aspect, the N TRPs include Q TRPs participating in the collaboration, and the index of the codebook parameter corresponding to each of the Q TRPs participating in the collaboration is included in the second index. Index of the first Q codebook parameters, Q is a positive integer.

In a seventh aspect, the present application provides a communication method. The execution subject of the method may be a network device or a chip applied in the network device. The following description takes the execution subject being a network device as an example.

The method may include: the network device determines a second set of values, each value in the second set of values being the proportion of the non-zero combination coefficient corresponding to each TRP in the plurality of TRPs to the combination coefficient; the network device sends a fourth instruction to the terminal device information, the fourth indication information is used to indicate the second set of values.

Based on the above technical solution, the network device can determine the second set of values and send the second set of values to the terminal device. Through this method, it can be ensured that the reserved overhead of the network device will not be wasted, and the terminal device can determine the partners participating in the collaboration based on the second set of values after obtaining the second set of values without sending the second set of values to the network device. The non-zero combination coefficient corresponding to each TRP in multiple TRP accounts for the proportion of the combination coefficient, so that the codebook structure information can be reported to the network device, such as the indication information corresponding to the port selection matrix, the indication information corresponding to the frequency domain compression matrix, and the combination coefficient The non-zero combination coefficient and other parameters further reduce the processing complexity of the terminal device and the reporting overhead.

In conjunction with the seventh aspect, in some implementations of the seventh aspect, the network device determines the second set of values, including: the network device determines the second set of values based on at least one set of codebook parameters, and the network device determines the second set of values in the at least one set of codebook parameters. Each set of codebook parameters includes the proportion of non-zero combination coefficients to combination coefficients.

In conjunction with the seventh aspect, in some implementations of the seventh aspect, the fourth indication information includes a bitmap, and the bitmap is associated with an index corresponding to each value in the second set of values.

In combination with the seventh aspect, in some implementations of the seventh aspect, the number of bitmaps is equal to the number of groups of at least one set of codebook parameters, and each set of codebook parameters in the at least one set of codebook parameters includes a non-zero combination coefficient. Proportion of the combination coefficient.

In conjunction with the seventh aspect, in some implementations of the seventh aspect, the fourth indication information includes a combination number, and the combination number is associated with an index corresponding to each value in the second set of values.

Combined with the seventh aspect, in some implementations of the seventh aspect, the number of digits of the combination number is determined based on the number of groups of at least one set of codebook parameters and the number of multiple TRPs, and each group of at least one set of codebook parameters The codebook parameters include the ratio of non-zero combination coefficients to combination coefficients.

An eighth aspect provides a communication device, which is used to perform the method in any of the possible implementation modes of the first to seventh aspects. Specifically, the device may include units and/or modules for performing the method in any possible implementation of the first to seventh aspects, such as a processing unit and/or a communication unit.

In conjunction with the eighth aspect, in some implementations of the eighth aspect, the device is a terminal device or a network device. When the device is a terminal device or a network device, the communication unit may be a transceiver, or an input/output interface; the processing unit may be at least one processor. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.

In conjunction with the eighth aspect, in some implementations of the eighth aspect, the device is a chip, chip system or circuit used for terminal equipment or network equipment. When the device is a chip, chip system or circuit used for terminal equipment or network equipment, the communication unit may be an input/output interface, interface circuit, output circuit, input circuit, pin or circuit on the chip, chip system or circuit. Related circuits, etc.; the processing unit may be at least one processor, processing circuit or logic circuit, etc.

A ninth aspect provides a communication device, which includes at least one processor for executing computer programs or instructions stored in a memory to perform the method in any of the possible implementations of the first to seventh aspects. Optionally, the device further includes a memory for storing computer programs or instructions. Optionally, the device further includes a communication interface, through which the processor reads the computer program or instructions stored in the memory.

In conjunction with the ninth aspect, in some implementations of the ninth aspect, the device is a terminal device or a network device.

In conjunction with the ninth aspect, in some implementations of the ninth aspect, the device is a chip, chip system or circuit used for terminal equipment or network equipment.

In a tenth aspect, this application provides a processor for executing the methods provided in the above aspects.

For operations such as sending and getting/receiving involved in the processor, if there is no special explanation, or if it does not conflict with its actual role or internal logic in the relevant description, it can be understood as processor output, reception, input and other operations. , can also be understood as the transmitting and receiving operations performed by the radio frequency circuit and the antenna, which is not limited in this application.

In an eleventh aspect, a computer-readable storage medium is provided. The computer-readable medium stores a program code for device execution. The program code includes a program code for executing any of the possible implementations of the above-mentioned first to seventh aspects. Methods.

In a twelfth aspect, a computer program product containing instructions is provided. When the computer program product is run on a computer, it causes the computer to execute the method in any of the possible implementation modes of the above-mentioned first to seventh aspects.

In a thirteenth aspect, the present application also provides a system, which system includes a terminal device, and the terminal device can be used to perform the steps performed by the terminal device in any of the methods of the first to fourth aspects.

In conjunction with the thirteenth aspect, in some implementations of the thirteenth aspect, the system may further include a network device, and the network device may be configured to perform the steps performed by the network device in the above fifth to seventh aspects.

In some possible implementations, the system may also include other devices that interact with one or more of the terminal device and network device in the solutions provided by the embodiments of this application, and so on.

Description of drawings

Figure 1 shows a schematic diagram of a communication scenario suitable for embodiments of the present application.

Figure 2 shows a schematic diagram of a communication method 200 provided by an embodiment of the present application.

Figure 3 shows a schematic diagram of a communication method 300 provided by an embodiment of the present application.

Figure 4 shows a schematic diagram of a communication method 400 provided by an embodiment of the present application.

Figure 5 shows a schematic diagram of a communication method 500 provided by an embodiment of the present application.

FIG. 6 shows a schematic block diagram of a communication device 600 provided by an embodiment of the present application.

Figure 7 shows a schematic block diagram of another communication device 700 provided by an embodiment of the present application.

FIG. 8 shows a schematic diagram of a chip system 800 provided by an embodiment of the present application.

Detailed ways

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

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5th generation, 5G) or new radio (NR) systems, long term evolution (long term evolution, LTE) systems, LTE frequency Frequency division duplex (FDD) system, LTE time division duplex (TDD) system, etc. The technical solution provided by this application can also be applied to future communication systems, such as the sixth generation mobile communication system. The technical solution provided by this application can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine type Communication (machine type communication, MTC), and the Internet of Things (internet of things, IoT) communication systems or other communication systems.

The terminal device in the embodiment of the present application may be a device that provides voice/data to users, for example, a handheld device with a wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminals are: mobile phones, tablets, laptops, PDAs, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, and smart grids Wireless terminals, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocols , SIP) telephone, wireless local loop (WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, which can Wearable devices, terminal devices in the 5G network or terminal devices in the future evolved public land mobile communication network (public land mobile network, PLMN), etc., are not limited in the embodiments of this application.

As an example and not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices. It is a general term for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes, etc. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly defined wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones. Use, such as various types of smart bracelets, smart jewelry, etc. for physical sign monitoring.

In addition, in the embodiment of this application, the terminal device may also be a terminal device in the IoT system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing human-machine Interconnection, an intelligent network that interconnects things.

In the embodiment of the present application, the device used to implement the functions of the terminal device may be a terminal device, or may be a device capable of supporting the terminal device to implement the function, such as a chip system or a chip, and the device may be installed in the terminal device. In the embodiments of this application, the chip system may be composed of chips, or may include chips and other discrete devices.

The network device in the embodiment of the present application may be a device used to communicate with a terminal device, and the network device may be a global system for mobile communications (GSM) system or code division multiple access (CDMA) The base station (base transceiver station, BTS) in the wideband code division multiple access (wideband code division multiple access, WCDMA) system can also be the base station (NodeB, NB) in the LTE system. It can also be the evolved base station (evoled) in the LTE system. NodeB, eNB or eNodeB), or a wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, access point, vehicle-mounted device, wearable device, and 5G Network equipment in the network or network equipment in the future evolved PLMN network, one or a group (including multiple antenna panels) of antenna panels of the base station in the 5G system, or it can also be a network node that constitutes a gNB or transmission point, Such as baseband unit (BBU), distributed unit (distributed unit, DU), etc., which are not limited by the embodiments of this application.

In some deployments, gNB may include centralized units (CUs) and DUs. The gNB may also include an active antenna unit (AAU). CU implements some functions of gNB, and DU implements some functions of gNB. For example, CU is responsible for processing non-real-time protocols and services, implementing radio resource control (RRC), and packet data convergence protocol (PDCP) layer functions. DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, media access control (MAC) layer and physical (physical, PHY) layer. AAU implements some physical layer processing functions, radio frequency processing and active antenna related functions. Since RRC layer information will eventually become PHY layer information, or transformed from PHY layer information, in this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by DU , or sent by DU+AAU. It can be understood that the network device may be a device including one or more of a CU node, a DU node, and an AAU node. In addition, the CU can be divided into network equipment in the access network (radio access network, RAN), or the CU can be divided into network equipment in the core network (core network, CN), which is not limited in this application.

In this embodiment of the present application, the terminal device or network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes central processing unit (CPU), memory management unit Hardware such as memory management unit (MMU) and memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through processes, such as Linux operating system, Unix operating system, Android operating system, iOS operating system or windows operating system, etc. This application layer includes applications such as browsers, address books, word processing software, and instant messaging software. Moreover, the embodiments of the present application do not specifically limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the present application can be run to provide according to the embodiment of the present application. For example, the execution subject of the method provided by the embodiment of the present application can be a terminal device or a network device, or a functional module in the terminal device or network device that can call a program and execute the program.

Figure 1 shows a schematic diagram of a communication scenario suitable for embodiments of the present application. The communication system in FIG. 1 may include at least one terminal device (eg, terminal device 110, terminal device 120, terminal device 130, terminal device 140, terminal device 150, and terminal device 160) and a network device 170. The network device 170 is used to provide communication services for terminal devices and access the core network. The terminal devices can access the network by searching for synchronization signals, broadcast signals, etc. sent by the network device 170, thereby establishing communication with the network device. The terminal device 110, the terminal device 120, the terminal device 130, the terminal device 140 and the terminal device 160 in Figure 1 can perform uplink and downlink transmission with the network device 170. For example, the network device 170 can send downlink data to the terminal device 110, the terminal device 120, the terminal device 130, the terminal device 140 and the terminal device 160, and can also receive the terminal device 110, the terminal device 120, the terminal device 130, the terminal device 140 and the terminal device 170. Uplink data sent by device 160.

In addition, the terminal device 140, the terminal device 150 and the terminal device 160 can also be regarded as a communication system. The terminal device 160 can send downlink data to the terminal device 140 and the terminal device 150, and can also receive uplink data sent by the terminal device 140 and the terminal device 150. data.

It should be understood that the network device included in the communication system may be one or more. A network device can send data to one or more end devices. Multiple network devices can also send data to one or more terminal devices at the same time.

The 5G communication system has higher requirements for system capacity, spectrum efficiency, etc. In this scenario, network equipment often needs to obtain channel state information (CSI) of the uplink channel and downlink channel to ensure system performance.

In the FDD system, there is a large frequency interval between the uplink channel and the downlink channel, and the uplink channel and the downlink channel are not completely reciprocal. The network equipment cannot obtain the complete downlink channel by estimating the uplink channel. This The terminal device is required to report the CSI of the downlink channel to the network device, so that the network device can reconstruct the downlink channel based on the CSI of the downlink channel. The basic process for the terminal device to report the CSI of the downlink channel to the network device may include the following steps:

In the first step, the network device sends configuration information to the terminal device.

The configuration information is used for the measurement configuration of the downlink channel, such as the measurement time of the downlink channel, the measurement behavior of the downlink channel, etc.

In the second step, the network device sends pilot (reference signaling, RS) information to the terminal device.

The RS information is used for downlink channel measurement.

In the third step, the terminal device measures the downlink channel based on the configuration information and RS information to obtain the CSI of the downlink channel.

In the fourth step, the terminal device reports the CSI of the downlink channel to the network device.

In the fifth step, the network device reconstructs the downlink channel based on the CSI of the downlink channel.

In the FDD system, although the uplink channel and the downlink channel are not completely reciprocal, some information between the uplink channel and the downlink channel has reciprocity, such as angle reciprocity and delay reciprocity. Based on this, the terminal device can obtain the CSI of the downlink channel based on the reciprocity of part of the information between the uplink channel and the downlink channel, and report the CSI of the downlink channel to the network device, so that the network device can perform downlink processing based on the CSI of the downlink channel. The channel is reconstructed. The basic process for the terminal device to report the CSI of the downlink channel to the network device based on the reciprocity of partial information between the uplink channel and the downlink channel may include the following steps:

In the first step, the network device performs channel estimation on the uplink channel and obtains partial information of the downlink channel based on the estimated uplink channel information, such as the angle information and delay information of the downlink channel;

In the second step, the network device sends RS information to the terminal device.

The RS information includes angle information and delay information of the downlink channel.

In the third step, the terminal device measures the downlink channel based on the RS information to obtain the CSI of the downlink channel.

In the fourth step, the terminal device reports the CSI of the downlink channel to the network device.

In the fifth step, the network device reconstructs the downlink channel based on the CSI of the downlink channel, the angle information and the delay information of the downlink channel.

In this embodiment of the present application, the CSI of the downlink channel includes some indication information for codebook reconstruction, and the network can complete the reconstruction of the precoding matrix or channel matrix based on the indication information fed back by the terminal. The three-level codebook structure corresponding to R16 eTypeII and R17 FeTypeII For the R16 eTypeII codebook, W ₁ ∈N ^P×2L is the spatial domain selection matrix, which means that 2L beams are selected from P spatial domain beams; is the frequency domain compression matrix, which means selecting M columns from the discrete Fourier transform (DFT) matrix set, N ₃ is the number of resources or sub-bands of the frequency domain resource block (RB); W ₂ ∈C ^2L×M is the combination coefficient quantized according to the quantization criterion. For the R17FeTypeII codebook, is the port selection matrix, which means selecting K ₁ ports from P ports; is the frequency domain compression matrix, which means selecting M columns from the DFT matrix set, and N ₃ is the number of resources or subbands of the frequency domain RB; is the combination coefficient quantified according to the quantization criterion.

When the terminal device reports the CSI of the downlink channel to the network device, it may report the codebook structure information in the uplink control information (UCI). For example, for the R16 eTypeII NP codebook, the terminal device can report the indication information corresponding to the air domain selection matrix W ₁ , the indication information corresponding to the frequency domain compression matrix W _f , the non-zero combination coefficient in the combination coefficient W ₂ and other parameters in the UCI; For another example, for the R17 FeTypeII PS codebook, the terminal device can report the indication information corresponding to the port selection matrix W ₁ , the indication information corresponding to the frequency domain compression matrix W _f , the non-zero combination coefficient in the combination coefficient W ₂ and other parameters in the UCI .

In order to further improve the performance of the system, the terminal device can report the CSI of the downlink channel to the network device in a multi-station cooperation manner. The CSI of the downlink channel includes the airspace base number corresponding to the transmitting and receiving point (TRP). number. There are many methods of multi-station cooperation, such as coherent cooperative transmission (coherent joint transmission, CJT), non-coherent joint transmission (NCJT), etc. For the R18 CJT codebook, the distance difference between the participating TRPs and the end device may result in a large difference in the channel between the participating TRPs and the end device. When the end device chooses to participate in the cooperating TRP, each TRP of its own When determining the number of corresponding airspace bases, there may be a large difference between the number of corresponding airspace bases for different TRPs. In this case, the terminal device needs to separately report to the network device the number of airspace bases corresponding to each TRP in all TRPs participating in the collaboration. , thus increasing the reporting overhead of the terminal device.

In view of the above technical problems, this application provides a communication method. Through this method, the terminal device does not need to separately report to the network device the number of airspace bases corresponding to each TRP in all TRPs participating in the collaboration, thereby reducing the reporting time of the terminal device. overhead.

Various embodiments provided by this application will be described in detail below with reference to the accompanying drawings.

It should be understood that TRP is mentioned many times in the embodiments of this application. It can be understood that when there are multiple pilot (channel state information-reference signaling, CSI-RS) resources used to measure CSI, the multiple CSI-RS There is a one-to-one correspondence between resources and multiple TRPs; when there is one CSI-RS resource, the one CSI-RS resource has multiple antenna ports, and the multiple antenna ports can be evenly allocated to each TRP. Each TRP The obtained number of antenna ports forms an antenna port group, and the number of antenna ports obtained by multiple TRPs forms multiple antenna port groups. There is a one-to-one correspondence between the multiple antenna port groups and multiple TRPs.

Figure 2 shows a schematic diagram of a communication method 200 provided by an embodiment of the present application. As shown in Figure 2, method 200 may include the following steps.

210. The terminal device receives first indication information from the network device. The first indication information is used to indicate the total number of airspace bases corresponding to each of the multiple transmission reception points TRP participating in the cooperation.

For example, assuming that there are three multiple TRPs participating in cooperation, denoted as TRP1, TRP2, and TRP3 respectively, the terminal device may receive first indication information from the network device, and the first indication information is used to indicate that TRP1, TRP2, and TRP3 correspond to The total number of bases in their respective airspace.

It should be understood that the total number of airspace bases corresponding to each of the multiple TRPs participating in the cooperation is the total number of airspace bases selected by the multiple TRPs participating in the cooperation.

Based on step 210, the way for the terminal device to obtain the total number of airspace bases corresponding to the multiple TRPs participating in the collaboration may also include: the terminal device may also receive first indication information from the network device, and the first indication information is used to indicate the TRPs participating in the collaboration. The average number of airspace bases corresponding to each TRP in multiple TRPs; the terminal device determines the total number of airspace bases corresponding to each of the multiple TRPs participating in the cooperation based on the average number of airspace bases.

Based on step 210, the way for the terminal device to obtain the total number of airspace bases corresponding to the multiple TRPs participating in the collaboration may also include: the terminal device may also receive first indication information from the network device, and the first indication information is used to indicate the TRPs participating in the collaboration. The number of airspace bases corresponding to each TRP in multiple TRPs; the terminal device determines the total number of airspace bases corresponding to each of the multiple TRPs participating in the cooperation based on the number of airspace bases corresponding to each TRP in the multiple TRPs participating in the cooperation.

220. The terminal device determines a first set of values. Each value in the first set of values is the number of airspace bases corresponding to each TRP in the plurality of TRPs. The sum of each value in the first set of values is equal to the total number of airspace bases.

It should be understood that the number of airspace bases corresponding to each TRP among multiple TRPs participating in cooperation may be the same or different, and this is not limited in the embodiment of the present application.

The terminal device can determine the first set of values in the following ways.

Method #A: The terminal device allocates the corresponding number of airspace bases to each TRP among the multiple TRPs participating in the cooperation based on the total number of airspace bases.

When the terminal device allocates the corresponding number of airspace bases to each TRP among the multiple TRPs participating in the cooperation, it may be allocated randomly or according to a certain rule, which is not limited in the embodiment of the present application.

For example, assuming that there are three TRPs participating in the cooperation, recorded as TRP1, TRP2, and TRP3 respectively, and the first indication information indicates that the total number of airspace bases corresponding to TRP1, TRP2, and TRP3 is 16, then the terminal device can use TRP1, TRP2, and TRP3 The corresponding number of airspace bases is allocated as 5, 6, and 5.

For example, assuming that there are two TRPs participating in the cooperation, recorded as TRP1 and TRP2 respectively, and the first indication information indicates that the total number of airspace bases corresponding to TRP1 and TRP2 is 10, then the terminal device can use the airspace bases corresponding to TRP1 and TRP2 respectively. The numbers are assigned to 3 and 7.

Method #B: The terminal device allocates a corresponding number of airspace bases to each TRP among the multiple TRPs participating in the cooperation based on the total number of airspace bases and the channel quality of the multiple TRPs participating in the cooperation.

For example, it is assumed that there are three TRPs participating in the cooperation, recorded as TRP1, TRP2, and TRP3 respectively. The first indication information indicates that the total number of airspace bases corresponding to TRP1, TRP2, and TRP3 is 16. Assuming that the channel quality of TRP1 is better, the terminal The equipment can allocate the number of airspace bases corresponding to TRP1, TRP2, and TRP3 to 10, 3, and 3 respectively.

In this way, TRPs with better channel quality can allocate more airspace bases, thereby improving system performance.

Method #C: The terminal device allocates the corresponding number of airspace bases to each TRP among the multiple TRPs participating in the cooperation based on the total number of airspace bases and the combined coefficient power of the multiple TRPs participating in the cooperation.

For example, assuming that there are three TRPs participating in cooperation, recorded as TRP1, TRP2, and TRP3 respectively, the first indication information indicates that the total number of airspace bases corresponding to TRP1, TRP2, and TRP3 is 16, and assuming that the combined coefficient power of TRP1 is larger, then The terminal equipment can allocate the number of airspace bases corresponding to TRP1, TRP2, and TRP3 to 10, 3, and 3 respectively.

In this way, TRPs with larger combined coefficient power can occupy more airspace bases, thereby improving system performance.

In method #D, the terminal device determines the first set of values based on at least one set of codebook parameters, and each set of codebook parameters in the at least one set of codebook parameters includes the number of airspace bases.

Among them, at least one set of codebook parameters may be codebook parameters in the R18 CJT codebook.

It should be understood that the R18 CJT codebook can be obtained by enhancing the existing R16 eTypeII NP codebook, or the existing R16 eTypeII NP codebook can be directly used as the R18 CJT codebook. This is not limited in the embodiment of the present application.

It should also be understood that the R16 eTypeII NP codebook is enhanced to obtain the R18 CJT codebook. It can be understood that for TRPs with better channel status among TRPs participating in collaboration, this type of TRP often has a greater impact on collaboration performance. , thus a larger number of airspace bases can be allocated to this type of TRP. At this time, the R16 eTypeII NP codebook can be enhanced to obtain the R18 CJT codebook. At least one set of codebook parameters in the R18 CJT codebook can include a larger number of airspace bases.

The following embodiments take the enhancement of the existing R16 eTypeII NP codebook to obtain the R18 CJT codebook as an example for illustrative explanation. The exemplary description of using the existing R16 eTypeII NP codebook as the R18 CJT codebook is similar to the exemplary description of enhancing the existing R16 eTypeII NP codebook to obtain the R18 CJT codebook, and will not be described again here.

Table 1 shows the R18 CJT single station codebook parameter combination. The R18 CJT single TRP codebook parameters can be obtained by adding part of the codebook parameter list to the codebook parameters in the R16 eTypeII NP codebook. For example, add a larger or The codebook parameter combination corresponding to the smaller airspace base number L=8 or L=1. Here, the codebook parameter combination list after adding L=8 is used as an example to illustrate the codebook parameter indication method.

Table 1 R18 CJT single TRP codebook parameter combination list

As shown in Table 1, L is the number of airspace bases; is the number of frequency domain bases, where v is the number of layers, N ₃ is the number of precoding matrix indicator (PMI) sub-bands, and R is each channel quality indicator (CQI) sub-band. The number of PMI subbands included; β is the proportion of the non-zero combination coefficient of a single TRP to the combination coefficient.

Table 1 shows 10 sets of codebook parameters. The 10 sets of codebook parameters can be recorded as index 1 to index 10 respectively. Among them, the number of airspace bases included in index 1 to index 10 are 2, 2, 4, 4, respectively. 4, 4, 6, 6, 8, 8, index 9 and index 10 are two sets of codebook parameters added to the codebook parameters in the R16 eTypeII NP codebook.

For example, assuming that there are three TRPs participating in the cooperation, recorded as TRP1, TRP2, and TRP3 respectively, and the first indication information indicates that the total number of airspace bases corresponding to TRP1, TRP2, and TRP3 is 16, then the terminal device can use index 1, index 8 , the codebook parameters corresponding to index 9 respectively determine the number of airspace bases corresponding to TRP1, TRP2, and TRP3 to be 2, 6, and 8.

In this way, the first set of values can be determined based on at least one set of codebook parameters (such as the codebook parameters in the R18 CJT codebook), thereby reducing the airspace corresponding to each TRP among the multiple TRPs that the terminal device can freely choose to participate in collaboration. Possible ways to determine the number of bases to further control the reporting overhead of terminal devices.

230. The terminal device sends second indication information to the network device, where the second indication information is used to indicate the first set of values.

Based on the above technical solution, the terminal device can send second indication information to the network device. The second indication information is used to indicate the first set of values. Therefore, after receiving the second indication information, the network device can determine which of the multiple TRPs participating in the collaboration. The number of airspace bases corresponding to each TRP. Through this method, when the terminal device reports to the network device the number of airspace bases corresponding to each TRP in the multiple TRPs participating in the collaboration, it can report the first set of values, and there is no need to separately report to the network device the number of airspace bases in the multiple TRPs participating in the collaboration. The number of airspace bases corresponding to each TRP can reduce the reporting overhead of terminal equipment.

Based on step 230, when the second indication information indicates the first set of values, the following methods may be used.

In manner #E, the second indication information includes a first index, and the first index is associated with the first set of numerical values.

Example 1, assuming that there are four TRPs participating in the cooperation, recorded as TRP1, TRP2, TRP3, and TRP4 respectively. The first indication information indicates that the total number of airspace bases corresponding to TRP1, TRP2, TRP3, and TRP4 is 16, then TRP1, TRP2, and TRP3 The possible ways for TRP4 to allocate the number of corresponding airspace bases are as shown in Table 2, and the sum of the number of corresponding airspace bases for TRP1, TRP2, TRP3, and TRP4 is equal to 16.

Table 2 Possible ways for TRP1, TRP2, TRP3, and TRP4 to allocate the number of corresponding airspace bases

As shown in Table 2, L1, L2, L3, and L4 can be the indices of the corresponding airspace base numbers of TRP1, TRP2, TRP3, and TRP4 respectively. The index of the base number of the airspace can correspond to the index in Table 1. Through the correspondence between the index of the number of airspace bases and the index in Table 1, we can get the possibility of TRP1, TRP2, TRP3, and TRP4 allocating the corresponding number of airspace bases. Way. For example, for index 0 in Table 2, the index of the number of airspace bases corresponding to TRP1 is 9. Then the index of the number of airspace bases corresponding to TRP1 corresponds to index 9 in Table 1. From index 9 in Table 1 It can be obtained that the number of airspace bases corresponding to TRP1 is 8; the index of the number of airspace bases corresponding to TRP2 is 5, then the index of the number of airspace bases corresponding to TRP2 corresponds to the index 5 in Table 1, from the index 5 in Table 1 It can be obtained that the number of airspace bases corresponding to TRP2 is 4; the index of the number of airspace bases corresponding to TRP3 is 2, then the index of the number of airspace bases corresponding to TRP3 corresponds to the index 2 in Table 1, from the index 2 in Table 1 It can be obtained that the number of airspace bases corresponding to TRP3 is 2; the index of the number of airspace bases corresponding to TRP4 is 2, then the index of the number of airspace bases corresponding to TRP4 corresponds to the index 2 in Table 1, from the index 2 in Table 1 It can be obtained that the number of airspace bases corresponding to TRP4 is 2. That is to say, for index 0 in Table 2, the possible ways for TRP1, TRP2, TRP3, and TRP4 to allocate the corresponding number of airspace bases are: The corresponding number of airspace bases for TRP1, TRP2, TRP3, and TRP4 are respectively 8, 4, 2, 2, thus making the sum of the number of airspace bases corresponding to TRP1, TRP2, TRP3, and TRP4 equal to 16. Through at least one of index 1 to index 5 in Table 2, other possible ways for TRP1, TRP2, TRP3, and TRP4 to allocate the corresponding number of airspace bases can also be obtained. For specific methods, please refer to index 0 in Table 2. No further details will be given here.

For example, the first index may be one of index 0 to index 5 in Table 2. For example, when the first group of values is 9, 5, 2, 2, the first index may be index 0; for another example, when the first group of values is 7, 4, 4, 2, the first index may be index 1 .

Example 2: Assume that there are three TRPs participating in the cooperation, recorded as TRP1, TRP2, and TRP3 respectively. The first indication information indicates that the total number of airspace bases corresponding to TRP1, TRP2, and TRP3 is 12, then TRP1, TRP2, and TRP3 allocate their corresponding airspaces. Possible methods for the number of bases are as shown in Table 3, and the sum of the number of bases in the airspace corresponding to TRP1, TRP2, and TRP3 is equal to 12.

Table 3 Possible ways for TRP1, TRP2, and TRP3 to allocate the number of corresponding airspace bases

As shown in Table 3, L1, L2, and L3 may be the indexes of the number of airspace bases corresponding to TRP1, TRP2, and TRP3 respectively. The index of the number of airspace bases may correspond to the index in Table 1. Through the correspondence between the index of the number of airspace bases and the index in Table 1, the possible ways for TRP1, TRP2, and TRP3 to allocate the corresponding number of airspace bases can be obtained. For example, for index 0 in Table 3, the index of the number of airspace bases corresponding to TRP1 is 9. Then the index of the number of airspace bases corresponding to TRP1 corresponds to index 9 in Table 1. From index 9 in Table 1 It can be obtained that the number of airspace bases corresponding to TRP1 is 8; the index of the number of airspace bases corresponding to TRP2 is 2, then the index of the number of airspace bases corresponding to TRP2 corresponds to the index 2 in Table 1, from the index 2 in Table 1 It can be obtained that the number of airspace bases corresponding to TRP2 is 2; the index of the number of airspace bases corresponding to TRP3 is 2, then the index of the number of airspace bases corresponding to TRP3 corresponds to the index 2 in Table 1, from the index 2 in Table 1 It can be obtained that the number of airspace bases corresponding to TRP3 is 2. That is to say, for index 0 in Table 3, the possible ways for TRP1, TRP2, and TRP3 to allocate the number of corresponding airspace bases are: the number of corresponding airspace bases for TRP1, TRP2, and TRP3 are 8, 2, and 2, so that the sum of the number of airspace bases corresponding to TRP1, TRP2, and TRP3 is equal to 12. Through at least one of index 1 to index 4 in Table 3, other possible ways for TRP1, TRP2, and TRP3 to allocate the number of corresponding airspace bases can also be obtained. For specific methods, please refer to index 0 in Table 3, here No further details will be given.

For example, the first index may be one of index 0 to index 4 in Table 3. For example, when the first group of values is 9, 2, and 2, the first index may be index 0; for another example, when the first group of values is 7, 4, and 2, the first index may be index 1.

Example 3: Assume that there are three TRPs participating in the cooperation, recorded as TRP1, TRP2, and TRP3 respectively. The first indication information indicates that the total number of airspace bases corresponding to TRP1, TRP2, and TRP3 is 8, then TRP1, TRP2, and TRP3 allocate their corresponding airspaces. Possible ways when the number of bases are determined are as shown in Table 4, and the sum of the number of bases in the airspace corresponding to TRP1, TRP2, and TRP3 is equal to 8.

Table 4 Possible ways for TRP1, TRP2, and TRP3 to allocate the number of corresponding airspace bases

As shown in Table 4, L1, L2, and L3 may be the indexes of the number of airspace bases corresponding to TRP1, TRP2, and TRP3 respectively. The index of the number of airspace bases may correspond to the index in Table 1. Through the correspondence between the index of the number of airspace bases and the index in Table 1, the possible ways for TRP1, TRP2, and TRP3 to allocate the corresponding number of airspace bases can be obtained. For example, for index 0 in Table 4, the index of the number of airspace bases corresponding to TRP1 is 4, then the index of the number of airspace bases corresponding to TRP1 corresponds to index 4 in Table 1, from index 4 in Table 1 It can be obtained that the number of airspace bases corresponding to TRP1 is 4; the index of the number of airspace bases corresponding to TRP2 is 2, then the index of the number of airspace bases corresponding to TRP2 corresponds to the index 2 in Table 1, from the index 2 in Table 1 It can be obtained that the number of airspace bases corresponding to TRP2 is 2; the index of the number of airspace bases corresponding to TRP3 is 2, then the index of the number of airspace bases corresponding to TRP3 corresponds to the index 2 in Table 1, from the index 2 in Table 1 It can be obtained that the number of airspace bases corresponding to TRP3 is 2. That is to say, for index 0 in Table 4, the possible ways for TRP1, TRP2, and TRP3 to allocate the number of corresponding airspace bases are: The corresponding numbers of airspace bases for TRP1, TRP2, and TRP3 are 4, 2, and 2, so that the sum of the number of airspace bases corresponding to TRP1, TRP2, and TRP3 is equal to 8. Through index 1 in Table 4, we can also obtain other possible ways for TRP1, TRP2, and TRP3 to allocate the corresponding number of airspace bases. For specific methods, please refer to index 0 in Table 4, which will not be described again here.

For example, the first index may be index 0 or index 1 in Table 4. For example, when the first group of values is 4, 2, and 2, the first index may be index 0; for another example, when the first group of values is 3, 1, and 1, the first index may be index 1.

Example 3: Assume that there are two TRPs participating in the cooperation, recorded as TRP1 and TRP2 respectively. The first indication information indicates that the total number of airspace bases corresponding to TRP1 and TRP2 is 8, then TRP1 and TRP2 allocate the number of corresponding airspace bases. Possible ways can be shown in Table 5, and the sum of the number of airspace bases corresponding to TRP1 and TRP2 is equal to 8.

Table 5 Possible ways for TRP1 and TRP2 to allocate the number of corresponding airspace bases

As shown in Table 5, L1 and L2 can be the indexes of the number of airspace bases corresponding to TRP1 and TRP2 respectively, and the index of the number of airspace bases can correspond to the index in Table 1. Through the correspondence between the index of the number of airspace bases and the index in Table 1, the possible ways for TRP1 and TRP2 to allocate the corresponding number of airspace bases can be obtained. For example, for index 0 in Table 5, the index of the number of airspace bases corresponding to TRP1 is 3, then the index of the number of airspace bases corresponding to TRP1 corresponds to index 3 in Table 1, from index 3 in Table 1 It can be obtained that the number of airspace bases corresponding to TRP1 is 4; the index of the number of airspace bases corresponding to TRP2 is 3, then the index of the number of airspace bases corresponding to TRP2 corresponds to the index 3 in Table 1, from the index 3 in Table 1 It can be obtained that the number of airspace bases corresponding to TRP2 is 4. That is to say, for index 0 in Table 5, the possible ways for TRP1 and TRP2 to allocate the number of corresponding airspace bases are: the number of corresponding airspace bases for TRP1 and TRP2 are 4 and 4 respectively, so that TRP1 The sum of the number of airspace bases corresponding to , TRP2 and TRP2 is equal to 8. Through at least one of index 1 to index 3 in Table 5, other possible ways for TRP1 and TRP2 to allocate the corresponding number of airspace bases can also be obtained. For specific methods, please refer to index 0 in Table 5, which will not be discussed here. Elaborate.

For example, the first index may be one of index 0 to index 3 in Table 5. For example, when the first group of values is 3, 3, the first index may be index 0; for another example, when the first group of values is 4, 4, the first index may be index 1.

Tables 2 to 5 give possible ways for multiple TRPs to allocate the corresponding number of airspace bases. It should be understood that there is no one-to-one correspondence between multiple TRPs and the number of airspace bases corresponding to multiple TRPs. For example, in Table 5, L1 and L2 can be the indexes of the number of airspace bases corresponding to TRP1 and TRP2 respectively, and L1 and L2 can also be the indexes of the number of airspace bases corresponding to TRP2 and TRP1 respectively. Table 2~Table The illustrative description of Table 4 is similar to Table 5 and will not be repeated here.

Optionally, when the first set of values is determined according to method #C, the total number of possible values of the first index will not exceed a certain value When corresponding to the number of airspace bases, the terminal device can report the first index, and the required number of bits can be For example, as shown in Table 2, the total number of possible values of the first index is 6, then the number of bits required when the terminal device reports to the network device the number of airspace bases corresponding to each of the multiple TRPs participating in the collaboration is 3; for another example, as shown in Table 3, the total number of possible values of the first index is 5, then when the terminal device reports to the network device the number of airspace bases corresponding to each of the multiple TRPs participating in the collaboration, so The required number of bits is 3; for another example, as shown in Table 4, the first index The total number of possible values is 2, then when the terminal device reports to the network device the number of airspace bases corresponding to each TRP in the multiple TRPs participating in the collaboration, the number of bits required is 1; for another example, as shown in Table 5, The total number of possible values of the first index is 4, so when the terminal device reports to the network device the number of airspace bases corresponding to each of the multiple TRPs participating in the collaboration, the number of bits required is 2.

Based on method #E, the terminal device sends the first index to the network device, so that the network device determines the number of airspace bases corresponding to each of the multiple TRPs participating in the collaboration. Through this method, when the terminal device reports to the network device the number of airspace bases corresponding to each TRP among the multiple TRPs participating in the collaboration, it can report the first index associated with the first set of values, and there is no need to separately report the participation to the network device. The number of airspace bases corresponding to each TRP in multiple coordinated TRPs can reduce the reporting overhead of terminal equipment.

In manner #F, the second indication information includes a bitmap, and the bitmap is associated with an index corresponding to each value in the first set of values.

Wherein, the number of bits in the bitmap is equal to the number of groups of at least one group of codebook parameters, and each group of codebook parameters in the at least one group of codebook parameters includes the number of spatial bases.

For example, at least one set of codebook parameters may be codebook parameters in the R18 CJT codebook. As shown in Table 1, there are 10 sets of codebook parameters in the R18 CJT codebook, so the number of bits in the bitmap is equal to 10.

For example, assuming that the second indication information indicates that there are two TRPs participating in the cooperation, recorded as TRP1 and TRP2 respectively, and the total number of airspace bases corresponding to TRP1 and TRP2 is 8, then the terminal device can use the R18 CJT codebook (as shown in Table 1 ), determine that the indexes corresponding to each value in the first group of values are index 2 and index 7. At this time, index 2 can be the index of the airspace base number 2 corresponding to TRP1, and index 7 can be TRP2. The index of the corresponding airspace base number 6, in this case the bitmap can be 0001000010, where "1" from right to left indicates that the corresponding index in Table 1 is the index corresponding to each value in the first group of values.

Based on method #F, the terminal device sends a bitmap to the network device, so that the network device determines the number of airspace bases corresponding to each of the multiple TRPs participating in the collaboration. Through this method, when the terminal device reports to the network device the number of airspace bases corresponding to each TRP in the multiple TRPs participating in the collaboration, it can report the bitmap associated with the index corresponding to each value in the first group of values, and there is no need to The number of airspace bases corresponding to each TRP among the multiple TRPs participating in the collaboration is independently reported to the network device, thereby reducing the reporting overhead of the terminal device.

In manner #G, the second indication information includes a combination number, and the combination number is associated with the index corresponding to each value in the first set of values.

The number of digits in the combination number is determined based on the number of groups of at least one set of codebook parameters and the number of multiple TRPs. Each set of codebook parameters in the at least one set of codebook parameters includes the number of spatial bases.

For example, at least one set of codebook parameters may be codebook parameters in the R18 CJT codebook. Assume that the number of groups of at least one set of codebook parameters is K, and the number of TRPs participating in cooperation is N, then the number of combinations is The number is

For example, assuming that the second indication information indicates that there are two TRPs participating in the cooperation, recorded as TRP1 and TRP2 respectively, and the total number of airspace bases corresponding to TRP1 and TRP2 is 8, then the terminal device can use the R18 CJT codebook (as shown in Table 1 ), determine that the indexes corresponding to each value in the first group of values are index 2 and index 7. At this time, index 2 can be the index of the airspace base number 2 corresponding to TRP1, and index 7 can be TRP2. The index of the corresponding airspace base number 6. At this time, the number of digits in the combination number is equal to 6. For example, the combination number could be 000001. In other words, the number of combinations is 000001, which means that the indexes corresponding to each value in the first group of values are index 2 and index 7.

Based on method #G, the terminal device sends the combination number to the network device, so that the network device determines the number of airspace bases corresponding to each TRP among the multiple TRPs participating in the cooperation. Through this method, when the terminal device reports to the network device the number of airspace bases corresponding to each TRP in the multiple TRPs participating in the collaboration, it can report the number of combinations associated with the index corresponding to each value in the first set of values, and there is no need to The number of airspace bases corresponding to each TRP among the multiple TRPs participating in the collaboration is independently reported to the network device, thereby reducing the reporting overhead of the terminal device.

Optionally, the first indication information is also used to indicate the number of frequency domain bases corresponding to each TRP in the plurality of TRPs, where the number of frequency domain bases corresponding to each TRP in the plurality of TRPs is the same.

Optionally, the first indication information is also used to indicate the ratio of all non-zero combination coefficients corresponding to the multiple TRPs to all combination coefficients. The ratio of all non-zero combination coefficients to all combination coefficients is greater than or equal to the first threshold. The first threshold It is the sum of the proportion of non-zero combination coefficients corresponding to each TRP in multiple TRPs to the combination coefficients.

For example, assuming that the number of airspace bases is L _s , there are N TRPs participating in cooperation, and N is a positive integer. The proportion of all non-zero combination coefficients corresponding to the N TRPs to all combination coefficients is β _s . The N Each TRP in the TRP corresponds to the non-zero combination system The proportions of the numbers to the combination coefficients are β _s1 , β _s2 ,..., β _sN respectively, then the relationship between β _s and β _s1 , β _s2 ,..., β _sN satisfies formula (1):

L _s β _s =L ₁ β _s1 +L ₂ β _s2 +…+L _N β _sN or,

Optionally, the first indication information is also used to indicate the average proportion of the non-zero combination coefficients corresponding to each TRP in the multiple TRPs to the combination coefficients; the terminal device determines the multiple TRPs based on the average proportion of the non-zero combination coefficients to the combination coefficients. The proportion of all corresponding non-zero combination coefficients to all combination coefficients. The proportion of all non-zero combination coefficients to all combination coefficients is greater than or equal to the first threshold. The first threshold is the proportion of non-zero combination coefficients corresponding to each TRP in multiple TRPs. The sum of proportions of combination coefficients.

For example, assuming that the number of airspace bases is L' _s , there are N TRPs participating in cooperation, N is a positive integer, and the average proportion of the corresponding non-zero combination coefficients of each TRP in the N TRPs to the combination coefficients is β' _s , the terminal device determines the proportion of all non-zero combination coefficients corresponding to N TRPs to all combination coefficients Nβ' _s based on the average proportion of non-zero combination coefficients to combination coefficients β' _s , each of the N TRPs The proportions of the corresponding non-zero combination coefficients of TRP in the combination coefficients are β' _s1 , β' _s2 ,..., β' _sN respectively, then the relationship between Nβ' _s and β' _s1 , β' _s2 ,..., β' _sN satisfies Formula (2):

NL' _s β' _s =L' ₁ β' _s1 +L' ₂ β' _s2 +…+L' _N β' _sN or,

Based on method 200, after the terminal device sends the first set of values to the network device, it can also report codebook structure information, such as the indication information corresponding to the air domain selection matrix W ₁ , the indication information corresponding to the frequency domain compression matrix W _f , and the combination coefficient W ₂ Non-zero combination coefficients and other parameters in . In order to further reduce the processing complexity and reporting overhead of the terminal device, the network device may also send the first set of values to the terminal device, so that the step of determining the first set of values can be performed on the network device side.

The network device sends the first set of values to the terminal device, which may include: the network device determines the first set of values, and each value in the first set of values is the number of airspace bases corresponding to each of the multiple TRPs participating in the collaboration; the network device Send second indication information to the terminal device, where the second indication information is used to indicate the first set of values.

Wherein, the network device determines the first set of values, including: the network device determines the first set of values based on at least one set of codebook parameters, and each set of codebook parameters in the at least one set of codebook parameters includes the number of airspace bases.

Through this method, the first set of values can be determined based on at least one set of codebook parameters (such as the codebook parameters in the R18 CJT codebook), thereby reducing the network equipment's free choice of the airspace corresponding to each TRP in the TRPs participating in the collaboration. Possible ways to base the number to further control the processing overhead of network devices.

Based on the above technical solution, the network device can determine the first set of values and send the first set of values to the terminal device. Through this method, it can be ensured that the reserved overhead of the network device will not be wasted, and the terminal device can determine the partners participating in the collaboration based on the first set of values after obtaining the first set of values without sending the first set of values to the network device. The number of airspace bases corresponding to each TRP in multiple TRPs can report codebook structure information to the network device, such as the indication information corresponding to the airspace selection matrix W ₁ , the indication information corresponding to the frequency domain compression matrix W _f , and the combination coefficient W The non-zero combination coefficient and other parameters in ₂ further reduce the processing complexity of the terminal device and the reporting overhead.

Optionally, the second indication information includes a first index, and the first index is associated with the first set of numerical values.

Based on the above technical solution, the network device can send the first index to the terminal device. Through this method, it can be ensured that the reserved overhead of the network device will not be wasted, and the terminal device can determine multiple TRPs participating in the collaboration based on the first index after obtaining the first index without sending the first index to the network device. The number of airspace bases corresponding to each TRP in , so that codebook structure information can be reported to the network device, such as the indication information corresponding to the airspace selection matrix W ₁ , the indication information corresponding to the frequency domain compression matrix W _f , and the indication information corresponding to the combination coefficient W ₂ Parameters such as non-zero combination coefficients further reduce the complexity of terminal device processing and reporting overhead.

Optionally, the second indication information includes a bitmap, and the bitmap is associated with an index corresponding to each value in the first set of values.

Based on the above technical solution, the network device can send the bitmap to the terminal device. Through this method, it can be ensured that the reserved overhead of the network device will not be wasted, and the terminal device can determine each TRP among the multiple TRPs participating in the collaboration based on the bitmap after obtaining the bitmap without sending a bitmap to the network device. The corresponding number of airspace bases allows the codebook structure information to be reported to the network device, such as the indication information corresponding to the airspace selection matrix W ₁ , the indication information corresponding to the frequency domain compression matrix W _f , and the non-zero combination coefficient in the combination coefficient W ₂ and other parameters, further reducing the complexity of terminal device processing and reporting overhead.

Optionally, the number of bits of the bitmap is equal to the number of sets of at least one set of codebook parameters, and each set of codebook parameters in the at least one set of codebook parameters includes the number of spatial bases.

Optionally, the second indication information includes a combination number, and the combination number is associated with an index corresponding to each value in the first set of values.

Based on the above technical solution, the network device can send the combination number to the terminal device. Through this method, the network equipment can be guaranteed to be pre- The remaining overhead will not be wasted, and the terminal device does not need to send the combination number to the network device. After obtaining the combination number, it can determine the number of airspace bases corresponding to each of the multiple TRPs participating in the collaboration based on the combination number, so that it can Report codebook structure information to the network device, such as the indication information corresponding to the air domain selection matrix W ₁ , the indication information corresponding to the frequency domain compression matrix W _f , the non-zero combination coefficient in the combination coefficient W ₂ and other parameters, further reducing the processing time of the terminal equipment The complexity and reported overhead.

Optionally, the number of bits in the combination number is determined based on the number of groups of at least one set of codebook parameters and the number of multiple TRPs, and each group of codebook parameters in the at least one set of codebook parameters includes the number of spatial bases.

The description of determining the first set of values on the network device side and sending the first set of values to the terminal device is similar to that on the terminal device side, and will not be described again here.

Based on the method 200, the terminal device may send a first set of values to the network device, so that the network device determines the number of airspace bases corresponding to each of the multiple TRPs participating in the cooperation. Method 300 shows that the terminal device can send bit numbers to the network device so that the network device determines the number of airspace bases corresponding to each of the multiple TRPs participating in the cooperation.

Figure 3 shows a schematic diagram of yet another communication method 300 provided by an embodiment of the present application. As shown in Figure 3, method 300 may include the following steps.

310. The terminal device receives the fifth indication information from the network device. The fifth indication information is used to indicate the total number of airspace bases P and the total number of airspace bases L corresponding to each of the multiple TRPs participating in the cooperation.

Among them, P and L are positive integers.

The total number of airspace bases P may include the total number L of airspace bases corresponding to each of the multiple TRPs participating in the cooperation.

It should be understood that the total number of airspace bases corresponding to multiple TRPs participating in cooperation is the total number of airspace bases selected by the TRPs participating in cooperation.

320. When the terminal device determines the number of airspace bases corresponding to each TRP among the multiple TRPs participating in the cooperation, the number of bits used is

It should be understood that the number of airspace bases corresponding to each TRP among multiple TRPs participating in cooperation may be the same or different, and this is not limited in the embodiment of the present application.

For example, assuming that there are three TRPs participating in the cooperation, recorded as TRP1, TRP2, and TRP3 respectively, the total number of airspace bases is 12, and the total number of airspace bases corresponding to the TRPs participating in the cooperation is 6, then the terminal device determines that among the TRPs participating in the cooperation When each TRP corresponds to the number of spatial bases, the number of bits used is 7.

For example, the terminal device determines that the number of airspace bases corresponding to each TRP in the TRPs participating in the cooperation can be expressed as a combination number as 110010011010, and "1" in each four-digit combination number from left to right represents the number of airspace bases participating in the cooperation. The number of airspace bases corresponding to each TRP in the TRP. For example, the "1" in "1100" represents the number of airspace bases corresponding to TRP1, the "1" in "1001" represents the number of airspace bases corresponding to TRP2, and the "1" in "1010" represents the number of airspace bases corresponding to TRP3. number. The terminal device can use the bit number 1000000 to represent the combination number 110010011010, so that the bit number 1000000 corresponds to the combination number 110010011010.

330, the terminal device sends the number of bits to the network device.

For example, the terminal device can send the bit number 1000000 to the network device. After the network device receives the bit number 1000000, it can determine the combination number 110010011010 corresponding to the bit number 1000000, and then can determine the number of combinations among the multiple TRPs participating in the collaboration. The number of airspace bases corresponding to each TRP.

Based on the above technical solution, the terminal device can send a number of bits to the network device, and the number of bits corresponds to the number of combinations. Therefore, after the network device receives the number of bits, it can determine the number of combinations based on the number of bits, and then determine the number of combinations participating in the collaboration. The number of airspace bases corresponding to each TRP in the TRP. Through this method, when the terminal device reports to the network device the number of airspace bases corresponding to each TRP in the TRP participating in the collaboration, it can report the number of bits, and there is no need to separately report to the network device the number of each TRP in the TRP participating in the collaboration. The corresponding number of airspace bases can reduce the reporting overhead of terminal equipment.

Optionally, based on methods 200 to 300, when there are multiple TRPs participating in cooperation and the number of airspace bases corresponding to some TRPs is 0, the terminal device may not report the codebooks corresponding to these TRPs to the network device. Structural information, such as the indication information corresponding to the spatial domain selection matrix W ₁ , the indication information corresponding to the frequency domain compression matrix W _f , the non-zero combination coefficient in the combination coefficient W ₂ and other parameters, can further reduce the reporting overhead of the terminal device.

Based on methods 200 to 300, the terminal device can send a first set of values or bit numbers to the network device, so that the network device determines the number of airspace bases corresponding to each TRP in multiple TRPs participating in the collaboration. The terminal device No need to connect to the network The device independently reports the number of airspace bases corresponding to each TRP in the multiple TRPs participating in the collaboration, thereby reducing the reporting overhead of the terminal device. Based on this, the terminal device can also send a second set of values to the network device, so that the network device determines the proportion of the non-zero combination coefficient corresponding to each TRP in the multiple TRPs participating in the collaboration to the combination coefficient. The terminal device can There is no need to separately report to the network device the proportion of the non-zero combination coefficient corresponding to each TRP in the multiple TRPs participating in the cooperation, thus reducing the reporting overhead of the terminal device.

Figure 4 shows a schematic diagram of yet another communication method 400 provided by an embodiment of the present application. As shown in Figure 4, method 400 may include the following steps.

410. The terminal device receives third indication information from the network device. The third indication information is used to indicate the proportion of all non-zero combination coefficients corresponding to the multiple transmission reception points TRP participating in the cooperation to all combination coefficients.

For example, assuming that there are three multiple TRPs participating in cooperation, denoted as TRP1, TRP2, and TRP3 respectively, the terminal device may receive third indication information from the network device. The third indication information is used to indicate that TRP1, TRP2, and TRP3 correspond to The proportion of all non-zero combination coefficients to all combination coefficients.

Based on step 410, the method for the terminal device to obtain the proportion of all non-zero combination coefficients corresponding to multiple TRPs participating in the collaboration to all combination coefficients may also include: the terminal device may also receive third indication information from the network device. The third indication information Used to indicate the average proportion of non-zero combination coefficients to the combination coefficients of each TRP in multiple TRPs participating in the collaboration; the terminal device determines all the corresponding non-zero combination coefficients of the TRPs participating in the collaboration based on the average proportion of the non-zero combination coefficients to the combination coefficients. The ratio of non-zero combination coefficients to all combination coefficients.

420. The terminal device determines a second set of values. Each value in the second set of values is the proportion of the non-zero combination coefficient corresponding to each TRP in the multiple TRPs to the combination coefficient. The sum of each value in the second set of values is equal to all non-zero combination coefficients. The proportion of zero combination coefficients to all combination coefficients.

It should be understood that the proportion of non-zero combination coefficients corresponding to each TRP in the multiple TRPs participating in the cooperation may be the same or different, and this is not limited in the embodiments of the present application.

Among them, the sum of the proportion of non-zero combination coefficients to the combination coefficients corresponding to each TRP in the multiple TRPs participating in the collaboration is equal to the ratio of all non-zero combination coefficients to all combination coefficients.

Optionally, the terminal device determines the second set of values, including: the terminal device determines the second set of values based on at least one set of codebook parameters, each set of codebook parameters in the at least one set of codebook parameters including a non-zero combination coefficient accounting for a combination The ratio of coefficients.

Among them, at least one set of codebook parameters may be codebook parameters in the R18 CJT codebook.

It should be understood that the R18 CJT codebook can be obtained by enhancing the existing R17 FeTypeII PS codebook, or the existing R17 FeTypeII PS codebook can be directly used as the R18 CJT codebook. This is not limited in the embodiment of the present application.

It should be understood that the R17 FeTypeII PS codebook is enhanced to obtain the R18 CJT codebook. It can be understood that for TRPs with better channel status among TRPs participating in collaboration, this type of TRP often has a greater impact on collaboration performance. Therefore, this type of TRP can be assigned a larger ratio of non-zero combination coefficients to combination coefficients. At this time, the R17 FeTypeII PS codebook can be enhanced to obtain the R18 CJT codebook. At least one set of codebook parameters in the R18 CJT codebook can include a larger ratio of non-zero combination coefficients to combination coefficients.

The following embodiments take the enhancement of the existing R17 FeTypeII PS codebook to obtain the R18 CJT codebook as an example for illustrative explanation. The exemplary description of using the existing R17 FeTypeII PS codebook as the R18 CJT codebook is similar to the exemplary description of enhancing the existing R17 FeTypeII PS codebook to obtain the R18 CJT codebook, and will not be described again here.

Table 6 shows the R18 CJT single station codebook parameter combination. The R18 CJT single TRP codebook parameters can be obtained by adding a partial codebook parameter list to the codebook parameters in the R17 FeTypeII PS codebook.

Table 6 R18 CJT single TRP codebook parameter combination list

As shown in Table 6, M is the number of frequency domain bases; α is the port selection proportion coefficient; β is the proportion of the non-zero combination coefficient of a single TRP in the combination coefficient.

Among them, the index of at least one set of codebook parameters can be the index of the codebook parameters in the R18 CJT codebook. As shown in Table 6, the number of sets of codebook parameters in the R18 CJT codebook is 12, corresponding to the codebook. The 12 indexes of the parameters, namely index 1, index 2, index 3, index 3, index 4, index 5, index 6, index 7, index 8, index 9, index 10, index 11, index 12, where index 1 , Index 2, Index 11, and Index 12 are the four sets of codebook parameters added to the codebook parameters in the R17 FeTypeII PS codebook.

For example, assuming that the third indication information indicates that there are three TRPs participating in the collaboration, recorded as TRP1, TRP2, and TRP3 respectively, and the proportion of all non-zero combination coefficients corresponding to TRP1, TRP2, and TRP3 to all combination coefficients is 9/4, then The terminal device can determine that the second set of values can include index 4, index 5 and index 6 in Table 6 based on the index of the codebook parameters in the R18 CJT codebook. At this time, index 4 can be the non-zero combination coefficient corresponding to TRP1. The index of the ratio of 1/2 of the combination coefficient. The index 5 can be the index of the non-zero combination coefficient corresponding to TRP2 accounting for 3/4 of the combination coefficient. The index 6 can be the index of the non-zero combination coefficient corresponding to TRP3 accounting for the ratio 1 of the combination coefficient. index, and the sum of the proportions of the corresponding non-zero combination coefficients of TRP1, TRP2, and TRP3 in the combination coefficients is equal to 9/4.

430. The terminal device sends fourth indication information to the network device, where the fourth indication information is used to indicate the second set of values.

Based on the above technical solution, the terminal device can send fourth indication information to the network device. The fourth indication information is used to indicate the second set of values. Therefore, after receiving the fourth indication information, the network device can determine which of the multiple TRPs participating in the collaboration. The non-zero combination coefficient corresponding to each TRP accounts for the proportion of the combination coefficient. Through this method, when the terminal device reports to the network device the proportion of the non-zero combination coefficient corresponding to each TRP in the multiple TRPs participating in the collaboration, it can report the second set of values, and there is no need to separately report the collaboration to the network device. The non-zero combination coefficient corresponding to each TRP in multiple TRPs accounts for the proportion of the combination coefficient, thereby reducing the reporting overhead of the terminal device.

Based on step 430, when the fourth indication information indicates the second set of values, the following methods may be used.

In manner #H, the fourth indication information includes a bitmap, and the bitmap is associated with an index corresponding to each value in the second group of values.

Wherein, the number of bits in the bitmap is equal to the number of groups of at least one group of codebook parameters, and each group of codebook parameters in the at least one group of codebook parameters includes a proportion of non-zero combination coefficients to combination coefficients.

For example, at least one set of codebook parameters may be codebook parameters in the R18 CJT codebook. As shown in Table 6, there are 12 sets of codebook parameters in the R18 CJT codebook, so the number of bits in the bitmap is equal to 12. When the index corresponding to each value in the second group of values includes index 4, index 5 and index 6 in Table 6, the bitmap may be 000000111000, where "1" from right to left represents the corresponding index in Table 6 is the index corresponding to each value in the second set of values.

Based on the above technical solution, the terminal device can send a bitmap to the network device, and the bitmap is associated with the index corresponding to each value in the second set of values, so that after the network device receives the bitmap, it can determine participation based on the bitmap. The proportion of the non-zero combination coefficient corresponding to each TRP in the multiple coordinated TRPs to the combination coefficient. Through this method, when the terminal device reports to the network device the proportion of the non-zero combination coefficient corresponding to each TRP in the multiple TRPs participating in the collaboration, it can report the bitmap, and there is no need to separately report the collaboration to the network device. The non-zero combination coefficient corresponding to each TRP in the multiple TRPs accounts for the proportion of the combination coefficient, thereby reducing the reporting overhead of the terminal device.

In manner #I, the fourth indication information includes a combination number, and the combination number is associated with the index corresponding to each value in the second set of values.

The number of digits in the combination number is determined based on the number of groups of at least one set of codebook parameters and the number of multiple TRPs. Each set of codebook parameters in the at least one set of codebook parameters includes a proportion of non-zero combination coefficients to combination coefficients.

For example, assuming that the number of groups of at least one set of codebook parameters is K and the number of TRPs participating in cooperation is N, then the number of digits in the number of combinations is

Exemplarily, at least one set of codebook parameters may be codebook parameters in the R18 CJT codebook. As shown in Table 6, there are 12 groups of codebook parameters in the R18 CJT codebook. When there are three TRPs participating in the collaboration, the number of digits in the combination is equal to 8. When the index corresponding to each value in the second group of values includes index 4, index 5 and index 6 in Table 6, the combination number may be 00000001. That is to say, the number of combinations is 00000001, which means that the index corresponding to each value in the second group of values includes index 4, index 5 and index 6 in Table 6.

Based on the above technical solution, the terminal device can send a combination number to the network device, and the combination number is associated with the index corresponding to each value in the second set of values. Therefore, after the network device receives the combination number, it can determine the participation based on the combination number. The proportion of the non-zero combination coefficient corresponding to each TRP in the multiple coordinated TRPs to the combination coefficient. Through this method, when the terminal device reports to the network device the proportion of the non-zero combination coefficient corresponding to each TRP in the multiple TRPs participating in the collaboration, it can report the number of combinations, and there is no need to separately report to the network device the number of combinations participating in the collaboration. The non-zero combination coefficient corresponding to each TRP in the multiple TRPs accounts for the proportion of the combination coefficient, thereby reducing the reporting overhead of the terminal device.

Optionally, the third indication information is also used to indicate the number of frequency domain bases corresponding to each TRP in the plurality of TRPs, where the number of frequency domain bases corresponding to each TRP in the plurality of TRPs is the same.

Optionally, the third indication information is also used to indicate the port selection proportion coefficient corresponding to each TRP in the multiple TRPs participating in the cooperation, and the frequency domain base number corresponding to each TRP in the multiple TRPs participating in the cooperation. The numbers are the same.

For example, the port selection proportion coefficient corresponding to each TRP among the multiple TRPs participating in the cooperation is α, and the number of frequency domain bases corresponding to each TRP among the multiple TRPs participating in the cooperation is M, then α is =M.

Optionally, the third indication information is also used to indicate a fourth threshold. The fourth threshold is the ratio of all non-zero combination coefficients corresponding to multiple TRPs participating in collaboration to all combination coefficients, and the port corresponding to multiple TRPs participating in collaboration. Select the product of the total proportional coefficients. The fourth threshold is greater than or equal to the fifth threshold. The fifth threshold is the proportion of the non-zero combination coefficient corresponding to each TRP in the multiple TRPs participating in the collaboration to the combination coefficient, which is the same as the TRP participating in the collaboration. The sum of the products of the port selection proportional coefficients corresponding to each TRP in the TRP.

For example, assuming that there are N TRPs participating in cooperation, N is a positive integer, the total proportion of all non-zero combination coefficients corresponding to the N TRPs to all combination coefficients is β _t , and each TRP in the N TRPs has its own The corresponding proportions of non-zero combination coefficients to combination coefficients are β _t1 , β _t2 ,..., β _tN respectively. The total proportional coefficient of port selection corresponding to the N TRPs is α _t , and each TRP in the N TRPs corresponds to The port selection proportional coefficients are α _t1 , α _t2 ,..., α _tN , then α _t , β _t and β _t1 , β _t2 ,..., β _tN , α _t1 , α _t2 ,..., α _tN satisfy the formula ( 3):
α _t β _t ≥α _t1 β _t1 +α _t2 β _t2 +…+α _tN β _tN (3)

Optionally, the third indication information is also used to indicate an eighth threshold. The eighth threshold is the average proportion of the non-zero combination coefficients corresponding to each TRP of the multiple TRPs participating in the collaboration to the combination coefficient, and the The product of the average port selection proportion coefficient corresponding to each TRP in the TRP; the terminal device determines the fourth threshold based on the eighth threshold, and the fourth threshold is the non-zero corresponding corresponding to each TRP in the multiple TRPs participating in the collaboration. The average proportion of the combination coefficient to the combination coefficient, the average port selection proportion coefficient corresponding to each TRP in the multiple TRPs participating in the collaboration, and the product of the number of multiple TRPs participating in the collaboration, the fourth threshold is greater than or equal to the Five thresholds. The fifth threshold is the proportion of the non-zero combination coefficient corresponding to each TRP in the multiple TRPs participating in the collaboration to the combination coefficient, and the port selection proportion coefficient corresponding to each TRP in the multiple TRPs participating in the collaboration. The sum of the products.

For example, assuming that there are N TRPs participating in cooperation, N is a positive integer, the average proportion of the non-zero combination coefficients corresponding to each TRP in the N TRPs to the combination coefficients is β' _t , among the N TRPs The proportion of the non-zero combination coefficient corresponding to each TRP in the combination coefficient is β' _t1 , β' _t2 ,..., β' _tN respectively. The corresponding average port selection proportion coefficient of each TRP in the N TRP is α′ _t , the corresponding port selection proportion coefficients of each TRP in the N TRPs are α′ _t1 , α′ _t2 ,..., α′ _tN , then α′ _t , β' _t and β' _t1 , β' _t2 ,...,β' _tN ,α' _t1 ,α' _t2 ,...,α' _tN satisfy formula (4):
Nα' _t β' _t ≥α' _t1 β' _t1 +α' _t2 β' _t2 +…+α' _tN β' _tN (4)

Based on method 400, after the terminal device sends the second set of values to the network device, it can also report codebook structure information, such as the indication information corresponding to the port selection matrix W ₁ , the indication information corresponding to the frequency domain compression matrix W _f , and the combination coefficient W ₂ Non-zero combination coefficients and other parameters in . In order to further reduce the processing complexity and reporting overhead of the terminal device, the network device may also send the second set of values to the terminal device, so that the step of determining the second set of values can be performed on the network device side.

The network device sends the second set of values to the terminal device, which may include: the network device determines the second set of values, and each value in the second set of values is the proportion of the non-zero combination coefficient corresponding to each TRP in the plurality of TRPs to the combination coefficient; The network device sends fourth indication information to the terminal device, and the fourth indication information is used to indicate the second set of values.

Wherein, the network device determines the second set of values, including: the network device determines the second set of values based on at least one set of codebook parameters, each set of codebook parameters in the at least one set of codebook parameters includes a non-zero combination coefficient accounting for 0.5% of the combination coefficient. Proportion.

Through this method, the second set of values can be determined based on at least one set of codebook parameters (such as the codebook parameters in the R18 CJT codebook), thereby reducing the need for network equipment to freely choose to participate in the collaboration of multiple TRPs corresponding to each TRP. Possible ways to determine the number of airspace bases to further control the processing overhead of network devices.

Based on the above technical solution, the network device can determine the second set of values and send the second set of values to the terminal device. Through this method, it can be ensured that the reserved overhead of the network device will not be wasted, and the terminal device can determine the partners participating in the collaboration based on the second set of values after obtaining the second set of values without sending the second set of values to the network device. The non-zero combination coefficient corresponding to each TRP in multiple TRP accounts for the proportion of the combination coefficient, so that the codebook structure information can be reported to the network device, such as the indication information corresponding to the port selection matrix W ₁ and the indication corresponding to the frequency domain compression matrix W _f Information, non-zero combination coefficients in the combination coefficient W ₂ and other parameters further reduce the processing complexity of the terminal device and the reporting overhead.

Optionally, the fourth indication information includes a bitmap, and the bitmap is associated with an index corresponding to each value in the second set of values.

Based on the above technical solution, the network device can send the bitmap to the terminal device. Through this method, it can be ensured that the reserved overhead of the network device will not be wasted, and the terminal device can determine the non-standard TRP corresponding to each of the multiple TRPs participating in the collaboration without sending a bitmap to the network device after obtaining the bitmap. The proportion of zero combination coefficients in the combination coefficients allows the codebook structure information to be reported to the network device, such as the indication information corresponding to the port selection matrix W ₁ , the indication information corresponding to the frequency domain compression matrix W _f , and the non-zero value in the combination coefficient W ₂ Parameters such as combination coefficients further reduce the complexity of terminal device processing and reporting overhead.

Optionally, the number of bits in the bitmap is equal to the number of groups of at least one group of codebook parameters, and each group of codebook parameters in the at least one group of codebook parameters includes a proportion of non-zero combination coefficients to combination coefficients.

Optionally, the fourth indication information includes a combination number, and the combination number is associated with an index corresponding to each value in the second set of values.

Based on the above technical solution, the network device can send the combination number to the terminal device. Through this method, it can be ensured that the reserved overhead of the network device will not be wasted, and the terminal device can determine the TRP corresponding to each of the multiple TRPs participating in the collaboration without sending the combination number to the network device. The ratio of non-zero combination coefficients to combination coefficients allows the codebook structure information to be reported to the network device, such as the indication information corresponding to the port selection matrix W ₁ , the indication information corresponding to the frequency domain compression matrix W _f , and the non-zero combination coefficient W ₂ Parameters such as zero combination coefficient further reduce the complexity of terminal device processing and reporting overhead.

Optionally, the number of digits of the combination number is determined based on the number of groups of at least one set of codebook parameters and the number of multiple TRPs. Each set of codebook parameters in the at least one set of codebook parameters includes non-zero combination coefficients accounting for 0.0% of the combination coefficients. Proportion.

The description of determining the second set of values on the network device side and sending the second set of values to the terminal device is similar to that on the terminal device side, and will not be described again here.

Based on methods 200 to 400, the terminal device can determine the number of airspace bases corresponding to each TRP in the multiple TRPs participating in the cooperation, and the non-zero combination coefficient corresponding to each TRP in the multiple TRPs participating in the cooperation. The proportion of the combination coefficient, and by sending the first set of values, the second set of values or the number of bits to the network device, the network device can obtain the number of airspace bases corresponding to each TRP in the multiple TRPs participating in the collaboration, And the proportion of the non-zero combination coefficient corresponding to each TRP in the multiple TRPs participating in the collaboration to the combination coefficient. Based on this, the method 500 shown in Figure 5 can be used by the network device to send the codebook parameters corresponding to each TRP in multiple TRPs to the terminal device, so that the terminal device can perform its own codebook parameters according to each TRP in the multiple TRPs. The corresponding codebook parameters determine the codebook parameters corresponding to each TRP among the multiple TRPs participating in the collaboration, thereby reducing the complexity of processing by the terminal device. The multiple TRPs may include multiple TRPs participating in the collaboration. The codebook parameters corresponding to each TRP may include the number of spatial bases, or the proportion of non-zero combination coefficients in the combination coefficients.

Figure 5 shows a schematic diagram of yet another communication method 500 provided by an embodiment of the present application. As shown in Figure 5, method 500 may include the following steps.

510. The network device determines a second index based on the indexes of M groups of codebook parameters. The second index is used to indicate a combination of indexes of codebook parameters corresponding to each TRP in the N TRPs.

Among them, M and N are positive integers, and N is less than or equal to M.

Each set of codebook parameters in M sets of codebook parameters may include the number of spatial bases, and each set of codebook parameters in M sets of codebook parameters may also include the proportion of non-zero combination coefficients in combination coefficients.

The network device determines the second index according to the index of the M group of codebook parameters. There are two examples below.

As an example, each set of codebook parameters in the M sets of codebook parameters may include the number of airspace bases, and the network device determines index, determine the second index.

Among them, the M group of codebook parameters can be the codebook parameters in the R18 CJT codebook.

It should be understood that the R18 CJT codebook can be obtained by enhancing the existing R16 eTypeII NP codebook, or the existing R16 eTypeII NP codebook can be directly used as the R18 CJT codebook. This is not limited in the embodiment of the present application.

It should also be understood that the R16 eTypeII NP codebook is enhanced to obtain the R18 CJT codebook. It can be understood that since the reporting overhead of the terminal device is related to the codebook parameters corresponding to each TRP in the multiple TRPs participating in the collaboration, therefore, In order to control the reporting overhead of terminal equipment, a smaller number of airspace bases can be allocated to some TRPs among multiple TRPs participating in cooperation. At this time, the R16 eTypeII NP codebook can be enhanced to obtain the R18 CJT codebook. At least one set of codebook parameters in the R18 CJT codebook can include a smaller number of airspace bases.

The following embodiments take the enhancement of the existing R16 eTypeII NP codebook to obtain the R18 CJT codebook as an example for illustrative explanation. The exemplary description of using the existing R16 eTypeII NP codebook as the R18 CJT codebook is similar to the exemplary description of enhancing the existing R16 eTypeII NP codebook to obtain the R18 CJT codebook, and will not be described again here.

Table 7 shows the R18 CJT single station codebook parameter combination. The R18 CJT single TRP codebook parameters can be obtained by adding part of the codebook parameter list to the codebook parameters in the R16 eTypeII NP codebook. For example, adding a smaller The codebook parameter combination corresponding to the spatial base number L=1.

Table 7 R18 CJT single TRP codebook parameter combination list

For descriptions of the parameters L, v, and β in Table 7, please refer to the description in Table 1, and will not be described again here.

Table 7 shows 12 groups of codebook parameters. The 12 groups of codebook parameters can be recorded as index 1, index 2, index 3, index 4, index 5, index 6, index 7, index 8, index 9, and index 10 respectively. , Index 11, Index 12, where Index 1 to Index 4 are the four sets of codebook parameters added to the codebook parameters in the R16 eTypeII NP codebook.

It can be concluded from Table 7 that the parameter M in step 810 is 12. Assume that the parameter N in step 810 is 4, that is, the number of TRPs is 4. The four TRPs are recorded as TRP1, TRP2, TRP3, and TRP4 respectively. , then the possible ways for TRP1, TRP2, TRP3, and TRP4 to allocate their corresponding codebook parameters can be shown in Table 8.

Table 8 Possible ways for TRP1, TRP2, TRP3, and TRP4 to allocate their corresponding codebook parameters

As shown in Table 8, R1, R2, R3, and R4 may be the indexes of the codebook parameters corresponding to TRP1, TRP2, TRP3, and TRP4 respectively. The indexes of the codebook parameters may correspond to the indexes in Table 7. Through the correspondence between the indexes of the codebook parameters and the indexes in Table 7, the possible ways for TRP1, TRP2, TRP3, and TRP4 to allocate their corresponding codebook parameters can be obtained. For example, for index 1 in Table 8, the index of the codebook parameter corresponding to TRP1 is 1, then the index of the codebook parameter corresponding to TRP1 corresponds to the index 1 in Table 7; the index of the codebook parameter corresponding to TRP2 is 2, then the index of the codebook parameter corresponding to TRP2 corresponds to index 2 in Table 7; the index of the codebook parameter corresponding to TRP3 is 3, then the index of the codebook parameter corresponding to TRP3 corresponds to index 3 in Table 7; TRP4 The index of the corresponding codebook parameter is 4, so the index of the codebook parameter corresponding to TRP4 corresponds to the index 4 in Table 7. Through at least one of index 2 to index 8 in Table 8, other possible ways for TRP1, TRP2, TRP3, and TRP4 to allocate their corresponding codebook parameters can also be obtained. For specific methods, please refer to Index 1 in Table 8. This will not be described again.

Based on Table 7 and Table 8, the network device can determine the second index according to the indexes of the 12 sets of codebook parameters in Table 7, where the second index is one of index 1 to index 8 in Table 8.

In another example, each group of codebook parameters in the M groups of codebook parameters may include a ratio of non-zero combination coefficients to combination coefficients, and the network device determines the second index according to the index of the M groups of codebook parameters.

Among them, the M group of codebook parameters can be the codebook parameters in the R18 CJT codebook.

It should be understood that the R18 CJT codebook can be obtained by enhancing the existing R17 FeTypeII PS codebook, or the existing R17 FeTypeII PS codebook can be directly used as the R18 CJT codebook. This is not limited in the embodiment of the present application.

It should also be understood that the R17 FeTypeII PS codebook is enhanced to obtain the R18 CJT codebook. It can be understood that since the reporting overhead of the terminal device is related to the codebook parameters corresponding to each TRP in the TRP participating in the collaboration, in order to control The reported overhead of the terminal device can allocate a lower proportion of non-zero combination coefficients to the combination coefficients for some TRPs in the TRPs participating in the collaboration. At this time, the R17 FeTypeII PS codebook can be enhanced to obtain the R18 CJT codebook. At least one set of codebook parameters in the R18 CJT codebook can include a lower ratio of non-zero combination coefficients to combination coefficients.

The following embodiments take the enhancement of the existing R17 FeTypeII PS codebook to obtain the R18 CJT codebook as an example for illustrative explanation. The exemplary description of using the existing R17 FeTypeII PS codebook as the R18 CJT codebook is similar to the exemplary description of enhancing the existing R17 FeTypeII PS codebook to obtain the R18 CJT codebook, and will not be described again here.

Table 9 shows the R18 CJT single station codebook parameter combination. The R18 CJT single TRP codebook parameters can be obtained by adding a partial codebook parameter list to the codebook parameters in the R17 FeTypeII PS codebook.

Table 9 R18 CJT single TRP codebook parameter combination list

For descriptions of parameters M, α, and β in Table 9, please refer to the description in Table 6, and will not be described again here.

Table 9 shows 16 groups of codebook parameters. The 16 groups of codebook parameters can be recorded as index 1 to index 16 respectively. Among them, index 1 to index 4 and index 9 to index 12 are the codes in the R17 FeTypeII PS codebook. Eight sets of codebook parameters added to this parameter.

It can be seen from Table 9 that the parameter M in step 810 is 16. Assume that the parameter N in step 810 is 4, that is, the number of TRPs is 4. The four TRPs are recorded as TRP1, TRP2, TRP3, and TRP4 respectively. , then the possible ways for TRP1, TRP2, TRP3, and TRP4 to allocate their corresponding codebook parameters can be shown in Table 10.

Table 10 Possible ways for TRP1, TRP2, TRP3, and TRP4 to allocate their corresponding codebook parameters

As shown in Table 10, R1, R2, R3, and R4 may be the indexes of the codebook parameters corresponding to TRP1, TRP2, TRP3, and TRP4 respectively. The indexes of the codebook parameters may correspond to the indexes in Table 9. Through the correspondence between the indexes of the codebook parameters and the indexes in Table 9, the possible ways for TRP1, TRP2, TRP3, and TRP4 to allocate their corresponding codebook parameters can be obtained. For example, for index 1 in Table 10, the index of the codebook parameter corresponding to TRP1 is 1, then the index of the codebook parameter corresponding to TRP1 corresponds to the index 1 in Table 9; the index of the codebook parameter corresponding to TRP2 is 2, then the index of the codebook parameter corresponding to TRP2 corresponds to index 2 in Table 9; the index of the codebook parameter corresponding to TRP3 is 3, then the index of the codebook parameter corresponding to TRP3 corresponds to index 3 in Table 9; TRP4 The index of the corresponding codebook parameter is 4, so the index of the codebook parameter corresponding to TRP4 corresponds to the index 4 in Table 9. Through at least one of index 2 to index 8 in Table 10, other possible ways for TRP1, TRP2, TRP3, and TRP4 to allocate their corresponding codebook parameters can also be obtained. For specific methods, please refer to Index 1 in Table 10. This will not be described again.

Based on Table 9 and Table 10, the network device can determine the second index according to the indexes of the 16 groups of codebook parameters in Table 9, where the second index is one of index 1 to index 8 in Table 10.

It should be understood that the above two examples are illustrated by taking the number N of TRPs equal to 4 as an example. It can be understood that the number of TRPs can also be other values. For example, the number of TRPs can be 2, and the number of TRPs can be 2. The number can also be 3.

520. The network device sends the second index to the terminal device.

Correspondingly, the terminal device may receive the second index from the network device.

For example, the second index may be one of index 1 to index 8 in table 8, and the second index may also be one of index 1 to index 8 in table 10. For example, the second index may be index 1 in Table 8. When the network device sends index 1 in Table 8 to the terminal device, it may send the bit number 001 corresponding to index 1 in Table 8 to the terminal device, and the terminal device receives After index 1 in Table 8, the codebook parameters corresponding to each TRP in the four TRPs can be obtained.

Based on the above technical solution, the network device can send a second index to the terminal device. The second index is used to indicate a combination of indexes of the codebook parameters corresponding to each TRP in the N TRPs, so that the terminal device receives the second index. Finally, the codebook parameters corresponding to each TRP in the N TRPs can be obtained. Through this method, when the network device indicates to the terminal device the codebook parameters corresponding to each TRP in the N TRPs, it can send the second index to the terminal device. The network device does not need to separately indicate to the terminal device the codebook parameters in the N TRPs. Each TRP has its own corresponding codebook parameters, thereby reducing the instruction overhead of the network device.

Optionally, the total number of indexes that may be selected by the second index will not exceed a certain value K. For example, when the second index is one of index 1 to index 8 in table 8, the total number of indexes that the second index may select will not exceed 8.

Based on step 520, after receiving the second index from the network device, the terminal device can determine the index of the codebook parameter corresponding to each of the Q TRPs participating in the collaboration based on the second index. The N TRPs include Q TRPs, the index of the codebook parameter corresponding to each TRP among the Q TRPs participating in the collaboration is the index of the first Q codebook parameters included in the second index, where N and Q are positive integers.

For example, assuming that the second index is one of index 1 to index 8 in Table 8, at this time the second index includes four TRPs The index of the codebook parameter corresponding to each TRP in . Assuming that the number of TRPs participating in collaboration is three, the index of the codebook parameter corresponding to each TRP in the three TRPs participating in collaboration is the second index. Index of the first three codebook parameters included. For example, assuming that the four TRPs are respectively recorded as TRP1, TRP2, TRP3, and TRP4, the index of the codebook parameter corresponding to each TRP in the three TRPs participating in the collaboration can be the codebook parameter corresponding to TRP1, TRP2, and TRP3. index of.

Based on the above technical solution, the terminal device can determine the codebook parameters corresponding to each of the Q TRPs participating in the collaboration according to the second index, thereby reducing the processing complexity of the terminal device.

It should be understood that Table 8 and Table 10 provide possible ways for multiple TRPs to allocate corresponding codebook parameters. It can be understood that there is not a one-to-one correspondence between multiple TRPs and the codebook parameters corresponding to multiple TRPs. For example, in Table 8, R1, R2, R3, and R4 can be the indexes of the corresponding codebook parameters of TRP1, TRP2, TRP3, and TRP4 respectively. R1, R2, R3, and R4 can also be respectively TRP2, TRP1, TRP3, The indexes of the codebook parameters corresponding to TRP4. R1, R2, R3, and R4 can also be the indexes of the codebook parameters corresponding to TRP1, TRP2, TRP4, and TRP3 respectively. R1, R2, R3, and R4 can also be the indexes of TRP1, R2, R3, and R4 respectively. Indexes of codebook parameters corresponding to other combinations of TRP2, TRP3, and TRP4. The exemplary description in Table 10 is similar to Table 8, and will not be described again here.

It can be understood that the examples in Figures 2 to 5 in the embodiments of the present application are only to facilitate those skilled in the art to understand the embodiments of the present application, and are not intended to limit the embodiments of the present application to the specific illustrated scenarios. Those skilled in the art can obviously make various equivalent modifications or changes based on the examples in FIGS. 2 to 5 , and such modifications or changes also fall within the scope of the embodiments of the present application. For example, "the number of airspace bases corresponding to each TRP among multiple TRPs participating in cooperation" in Figure 2 can be replaced by "the number of airspace bases corresponding to each TRP among multiple TRPs participating in cooperation."

It can also be understood that some optional features in the embodiments of the present application may not depend on other features in certain scenarios, or may be combined with other features in certain scenarios without limitation.

It can also be understood that the solutions in the various embodiments of the present application can be used in reasonable combinations, and the explanations or descriptions of various terms appearing in the embodiments can be referred to or interpreted in each embodiment, without limitation.

It can also be understood that the sizes of various numerical serial numbers in the embodiments of the present application do not mean the order of execution, but are only distinctions for convenience of description, and should not constitute any limitation on the implementation process of the embodiments of the present application.

It can also be understood that in this application, "at least one (item)" refers to one or more, and "plurality" refers to two or more. "And/or" is used to describe the relationship between associated objects, indicating that there can be three relationships. For example, "A and/or B" can mean: only A exists, only B exists, and A and B exist simultaneously. , where A and B can be singular or plural. The character "/" generally indicates that the related objects are in an "or" relationship. “At least one of the following” or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items). For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c" ”, where a, b, c can be single or multiple.

It can also be understood that each embodiment of the present application involves some information names, such as first instruction information, second instruction information, etc. It should be understood that the naming does not limit the protection scope of the embodiments of the present application.

It can also be understood that in the above method embodiments, the methods and operations implemented by the terminal device or network device can also be implemented by components (such as chips or circuits) of the terminal device or network device.

Corresponding to the methods provided in the above method embodiments, embodiments of the present application also provide corresponding devices, and the devices include modules for executing corresponding modules in each of the above method embodiments. The module can be software, hardware, or a combination of software and hardware. It can be understood that the technical features described in the above method embodiments are also applicable to the following device embodiments.

In the above-mentioned embodiments provided by the present application, the methods provided by the embodiments of the present application are introduced from the perspectives of network equipment, terminal equipment, and interaction between network equipment and terminal equipment. In order to implement each function in the method provided by the above embodiments of the present application, network equipment and terminal equipment may include hardware structures and/or software modules to implement the above functions in the form of hardware structures, software modules, or hardware structures plus software modules. . Whether one of the above functions is performed as a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

Above, the communication method provided by the embodiment of the present application is described in detail with reference to FIGS. 2 to 5 . The communication device provided by the embodiment of the present application will be described in detail below with reference to FIGS. 6 to 8 .

Figure 6 is a schematic block diagram of a communication device provided by an embodiment of the present application. The device 600 includes a processing unit 620 and a transceiver unit 610. The processing unit 620 can be used to implement corresponding processing functions, such as determining a first set of values. The transceiver unit 610 can be used to implement Corresponding communication functions. The transceiver unit 610 may also be called a communication interface or a communication unit.

Optionally, the device 600 also includes a storage unit, which can be used to store instructions and/or data, and the processing unit 620 can read the instructions and/or data in the storage unit, so that the device implements each of the foregoing method embodiments. The actions of terminal equipment or network equipment in .

The device 600 can be used to perform the actions performed by the terminal device or the network device in the above method embodiments. In this case, the device 600 can be a terminal device or a component of the terminal device, or a network device or a component of the network device. As a component, the transceiver unit 610 is used to perform operations related to the transceiver of the terminal device or the network device in the above method embodiment, and the processing unit 620 is used to perform the operations related to the processing of the terminal device or the network device in the above method embodiment.

As a design, the device 600 is used to perform the actions performed by the terminal device in each of the above method embodiments.

In one possible implementation, the transceiver unit 610 is configured to receive the first indication information from the network device. The first indication information is used to indicate the total number of airspace bases corresponding to each of the multiple transmission reception points TRP participating in the cooperation; the processing unit 620 , used to determine the first set of values. Each value in the first set of values is the number of airspace bases corresponding to each TRP in the plurality of TRPs. The sum of each value in the first set of values is equal to the total number of airspace bases; the transceiver unit 610 , used to send second indication information to the network device, and the second indication information is used to indicate the first set of values.

Optionally, the processing unit 620 is configured to determine a first set of values based on at least one set of codebook parameters, where each set of codebook parameters in the at least one set of codebook parameters includes the number of spatial bases.

Optionally, the second indication information includes a first index, and the first index is associated with the first set of numerical values.

Optionally, the second indication information includes a bitmap, and the bitmap is associated with an index corresponding to each value in the first set of values.

Optionally, the number of bits of the bitmap is equal to the number of sets of at least one set of codebook parameters, and each set of codebook parameters in the at least one set of codebook parameters includes the number of spatial bases.

Optionally, the second indication information includes a combination number, and the combination number is associated with an index corresponding to each value in the first set of values.

Optionally, the number of bits in the combination number is determined based on the number of groups of at least one set of codebook parameters and the number of multiple TRPs, and each group of codebook parameters in the at least one set of codebook parameters includes the number of spatial bases.

Optionally, the first indication information is also used to indicate the number of frequency domain bases corresponding to each TRP in the plurality of TRPs, where the number of frequency domain bases corresponding to each TRP in the plurality of TRPs is the same.

In another possible implementation, the transceiver unit 610 is configured to receive a second index from the network device. The second index is used to indicate a combination of indexes of the codebook parameters corresponding to each TRP of the N transmission reception points TRP; processing Unit 620 is configured to determine, based on the second index, the index of the codebook parameter corresponding to each of the Q TRPs participating in the collaboration. The N TRPs include Q TRPs, and the codebook parameters corresponding to each of the Q TRPs are The index is the index of the first Q codebook parameters included in the second index, where N and Q are positive integers.

In another possible implementation, the transceiver unit 610 is used to receive the third indication information from the network device. The third indication information is used to indicate that all non-zero combination coefficients corresponding to the multiple transmission reception points TRP participating in the cooperation account for all combinations. The proportion of coefficients; the processing unit 620 is used to determine a second set of values. Each value in the second set of values is the proportion of the non-zero combination coefficient corresponding to each TRP in the plurality of TRPs to the combination coefficient. Each value in the second set of values The sum of the values is equal to the ratio of all non-zero combination coefficients to all combination coefficients; the transceiver unit 610 is configured to send fourth indication information to the network device, and the fourth indication information is used to indicate the second set of values.

Optionally, the processing unit 620 is configured to determine a second set of values based on at least one set of codebook parameters, where each set of codebook parameters in the at least one set of codebook parameters includes a ratio of non-zero combination coefficients to combination coefficients.

Optionally, the fourth indication information includes a bitmap, and the bitmap is associated with an index corresponding to each value in the second set of values.

Optionally, the number of bits in the bitmap is equal to the number of groups of at least one group of codebook parameters, and each group of codebook parameters in the at least one group of codebook parameters includes a proportion of non-zero combination coefficients to combination coefficients.

Optionally, the fourth indication information includes a combination number, and the combination number is associated with an index corresponding to each value in the second set of values.

Optionally, the number of digits of the combination number is determined based on the number of groups of at least one set of codebook parameters and the number of multiple TRPs. Each set of codebook parameters in the at least one set of codebook parameters includes non-zero combination coefficients accounting for 0.0% of the combination coefficients. Proportion.

Optionally, the third indication information is also used to indicate the number of frequency domain bases corresponding to each TRP in the plurality of TRPs, where the number of frequency domain bases corresponding to each TRP in the plurality of TRPs is the same.

Another possible implementation, the transceiver unit 610 is used to receive the fifth indication information from the network device. The fifth indication information is used to indicate the total number of airspace bases P and the airspace corresponding to each of the multiple transmission reception points TRP participating in the cooperation. The total number of bases L, where, P, L is a positive integer; the processing unit is used to determine the number of air domain bases corresponding to each TRP in multiple TRPs. The number of bits used is Transceiver unit, used to send bits to network equipment.

The device 600 can implement steps or processes corresponding to the execution of the terminal device in the method embodiments according to the embodiments of the present application. The device 600 can include a step for executing the execution of the terminal device in any one of the embodiments shown in Figures 2 to 5. method unit.

As another design, the device 600 is used to perform the actions performed by the network device in each of the above method embodiments.

In one possible implementation, the processing unit 620 is used to determine a first set of values, where each value in the first set of values is the number of airspace bases corresponding to each TRP of multiple transmission and reception points TRP participating in the collaboration; the transceiver unit 610, used to send second indication information to the terminal device, where the second indication information is used to indicate the first set of values.

Optionally, the processing unit 620 is configured to determine a first set of values based on at least one set of codebook parameters, where each set of codebook parameters in the at least one set of codebook parameters includes the number of spatial bases.

Optionally, the second indication information includes a first index, and the first index is associated with the first set of numerical values.

Optionally, the second indication information includes a bitmap, and the bitmap is associated with an index corresponding to each value in the first set of values.

Optionally, the number of bits of the bitmap is equal to the number of sets of at least one set of codebook parameters, and each set of codebook parameters in the at least one set of codebook parameters includes the number of spatial bases.

Optionally, the second indication information includes a combination number, and the combination number is associated with an index corresponding to each value in the first set of values.

Optionally, the number of bits in the combination number is determined based on the number of groups of at least one set of codebook parameters and the number of multiple TRPs, and each group of codebook parameters in the at least one set of codebook parameters includes the number of spatial bases.

In another possible implementation, the processing unit 620 is configured to determine a second index according to the indexes of the M groups of codebook parameters. The second index is used to indicate the codebook parameters corresponding to each TRP of the N transmission reception points TRP. A combination of indexes, where M and N are positive integers, and N is less than or equal to M; a transceiver unit configured to send the second index to the terminal device.

Optionally, N TRPs include Q TRPs participating in collaboration. The index of the codebook parameter corresponding to each TRP in the Q TRPs participating in collaboration is the index of the first Q codebook parameters included in the second index, and Q is positive. integer.

In another possible implementation, the processing unit 620 is used to determine a second set of values. Each value in the second set of values is the proportion of the non-zero combination coefficient corresponding to each TRP in the plurality of TRPs to the combination coefficient; the transceiver unit 610, used to send fourth indication information to the terminal device, where the fourth indication information is used to indicate the second set of values.

Optionally, the processing unit 620 is configured to determine a second set of values based on at least one set of codebook parameters, where each set of codebook parameters in the at least one set of codebook parameters includes a ratio of non-zero combination coefficients to combination coefficients.

Optionally, the fourth indication information includes a bitmap, and the bitmap is associated with an index corresponding to each value in the second set of values.

Optionally, the number of bits in the bitmap is equal to the number of groups of at least one group of codebook parameters, and each group of codebook parameters in the at least one group of codebook parameters includes a proportion of non-zero combination coefficients to combination coefficients.

Optionally, the fourth indication information includes a combination number, and the combination number is associated with an index corresponding to each value in the second set of values.

Optionally, the number of digits of the combination number is determined based on the number of groups of at least one set of codebook parameters and the number of multiple TRPs. Each set of codebook parameters in the at least one set of codebook parameters includes non-zero combination coefficients accounting for 0.0% of the combination coefficients. Proportion.

The device 600 can implement steps or processes corresponding to the execution of the network device in the method embodiment according to the embodiment of the present application. The device 600 can include a method for executing the execution of the network device in any one of the embodiments shown in Figures 2 to 5. method unit.

It should be understood that the specific process of each unit performing the above corresponding steps has been described in detail in each of the above method embodiments, and will not be described again for the sake of brevity.

It should also be understood that the device 600 here is embodied in the form of a functional unit. The term "unit" as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor, or a group of processors) used to execute one or more software or firmware programs. processor, etc.) and memory, merged logic circuitry, and/or other suitable components to support the described functionality. In an optional example, those skilled in the art can understand that the apparatus 600 can be specifically a terminal device or a network device in the above embodiments, and can be used to execute various processes corresponding to the terminal device or network device in the above method embodiments. and/or steps, to avoid repetition, will not be repeated here.

The apparatus 600 of each of the above solutions has the function of implementing the corresponding steps performed by the terminal device or network device in the above method. The functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more Modules corresponding to the above functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), other units, such as processing units, etc. The processor may be used instead to perform the sending and receiving operations and related processing operations in each method embodiment respectively.

In addition, the above-mentioned transceiver unit 610 may also be a transceiver circuit (for example, it may include a receiving circuit and a transmitting circuit), and the processing unit may be a processing circuit.

It should be pointed out that the device in Figure 6 can be the device in the aforementioned embodiment, or it can be a chip or a chip system, such as a system on chip (SoC). The transceiver unit may be an input-output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip. No limitation is made here.

As shown in Figure 7, an embodiment of the present application provides another communication device 700. The device 700 includes a processor 710 coupled to a memory 720 for storing computer programs or instructions and/or data. The processor 710 is used for executing computer programs or instructions stored in the memory 720, or reading the memory 720. The stored data is used to execute the methods in the above method embodiments.

Optionally, there are one or more processors 710 .

Optionally, there are one or more memories 720 .

Optionally, the memory 720 is integrated with the processor 710, or is provided separately.

Optionally, as shown in Figure 7, the device 700 also includes a transceiver 730, which is used for receiving and/or transmitting signals. For example, the processor 710 is used to control the transceiver 730 to receive and/or transmit signals.

As a solution, the device 700 is used to implement the operations performed by the terminal device or network device in each of the above method embodiments.

For example, the processor 710 is used to execute computer programs or instructions stored in the memory 720 to implement related operations of the terminal device in each of the above method embodiments. For example, the method executed by the terminal device in any one of the embodiments shown in Figures 2 to 5.

It should be understood that the processor mentioned in the embodiments of this application may be a central processing unit (CPU), or other general-purpose processor, digital signal processor (DSP), or application-specific integrated circuit (ASIC). application specific integrated circuit (ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory and/or a non-volatile memory. Among them, non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM includes the following forms: static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), Double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) and direct Memory bus random access memory (direct rambus RAM, DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) can be integrated in the processor.

It should also be noted that the memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.

As shown in Figure 8, an embodiment of the present application provides a chip system 800. The chip system 800 (or can also be called a processing system) includes a logic circuit 810 and an input/output interface 820.

The logic circuit 810 may be a processing circuit in the chip system 800 . The logic circuit 810 can be coupled to the storage unit and call instructions in the storage unit, so that the chip system 800 can implement the methods and functions of various embodiments of the present application. The input/output interface 820 can be an input/output circuit in the chip system 800, which outputs information processed by the chip system 800, or inputs data or signaling information to be processed into the chip system 800 for processing.

As a solution, the chip system 800 is used to implement the operations performed by the terminal device or network device in each of the above method embodiments.

For example, the logic circuit 810 is used to implement the processing-related operations performed by the terminal device in the above method embodiment, such as the processing-related operations performed by the terminal device in any of the embodiments shown in Figures 2 to 5; input / The output interface 820 is used to implement the above method The sending and/or receiving related operations performed by the terminal device in the embodiment are the sending and/or receiving related operations performed by the terminal device in any of the embodiments shown in FIG. 2 to FIG. 5 .

Embodiments of the present application also provide a computer-readable storage medium on which are stored computer instructions for implementing the methods executed by terminal devices or network devices in each of the above method embodiments.

For example, when the computer program is executed by a computer, the computer can implement the method executed by the terminal device in each embodiment of the above method.

Embodiments of the present application also provide a computer program product, which includes instructions. When the instructions are executed by a computer, the methods executed by terminal devices or network devices in each of the above method embodiments are implemented.

For explanations of relevant content and beneficial effects of any of the devices provided above, please refer to the corresponding method embodiments provided above, and will not be described again here.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. In addition, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. For example, the computer may be a personal computer, a server, or a network device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means. 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, etc. that contains one or more available media integrated. The available media may be magnetic media (such as floppy disks, hard disks, magnetic tapes), optical media (such as DVDs), or semiconductor media (such as solid state disks (SSD)), etc. For example, the aforementioned available media include but Not limited to: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (22)

1. A communication method, characterized by including:

   The terminal device receives first indication information from the network device, where the first indication information is used to indicate the total number of airspace bases corresponding to each of the multiple transmission reception points TRP participating in the cooperation;

   The terminal device determines a first set of values, each value in the first set of values is the number of airspace bases corresponding to each TRP in the plurality of TRPs, and the sum of each value in the first set of values is equal to The total number of bases in the airspace mentioned above;

   The terminal device sends second indication information to the network device, where the second indication information is used to indicate the first set of values.
2. The method of claim 1, wherein the terminal device determines the first set of values, including:

   The terminal device determines the first set of values based on at least one set of codebook parameters, and each set of codebook parameters in the at least one set of codebook parameters includes a number of spatial bases.
3. The method according to claim 1 or 2, characterized in that the second indication information includes a first index, and the first index is associated with the first set of numerical values.
4. The method according to claim 1 or 2, characterized in that the second indication information includes a bitmap, and the bitmap is associated with an index corresponding to each value in the first set of values.
5. The method according to claim 4, characterized in that the number of bits in the bitmap is equal to the number of groups of at least one group of codebook parameters, and each group of codebook parameters in the at least one group of codebook parameters includes a spatial base number. number.
6. The method according to claim 1 or 2, characterized in that the second indication information includes a combination number, and the combination number is associated with an index corresponding to each value in the first set of values.
7. The method according to claim 6, wherein the number of digits of the combination number is determined based on the number of groups of at least one set of codebook parameters and the number of the plurality of TRPs. Each set of codebook parameters includes the number of spatial bases.
8. The method according to any one of claims 1 to 7, characterized in that the first indication information is also used to indicate the number of frequency domain bases corresponding to each TRP in the plurality of TRPs, wherein the Each TRP in multiple TRPs corresponds to the same number of frequency domain bases.
9. A communication method, characterized by including:

   The terminal device receives a second index from the network device, where the second index is used to indicate a combination of indexes of codebook parameters corresponding to each TRP of the N transmission reception points TRP;

   The terminal device determines the index of the codebook parameter corresponding to each of the Q TRPs participating in the collaboration according to the second index, the N TRPs include the Q TRPs, and each of the Q TRPs The index of the codebook parameter corresponding to the TRP is the index of the first Q codebook parameters included in the second index, where N and Q are positive integers.
10. A communication method, characterized by including:

    The network device determines a first set of values, where each value in the first set of values is the number of airspace bases corresponding to each TRP of the multiple transmission and reception points TRP participating in the cooperation;

    The network device sends second indication information to the terminal device, where the second indication information is used to indicate the first set of values.
11. The method of claim 10, wherein the network device determines the first set of values, including:

    The network device determines the first set of values based on at least one set of codebook parameters, and each set of codebook parameters in the at least one set of codebook parameters includes a number of spatial bases.
12. The method according to claim 10 or 11, characterized in that the second indication information includes a first index, and the first index is associated with the first set of numerical values.
13. The method according to claim 10 or 11, characterized in that the second indication information includes a bitmap, and the bitmap is associated with an index corresponding to each value in the first set of values.
14. The method according to claim 13, wherein the number of bitmaps is equal to the number of groups of at least one group of codebook parameters, and each group of codebook parameters in the at least one group of codebook parameters includes a spatial base number. number.
15. The method according to claim 10 or 11, characterized in that the second indication information includes a combination number, and the combination number is associated with an index corresponding to each value in the first set of values.
16. The method according to claim 15, characterized in that the number of digits of the combination number is based on the number of groups of at least one set of codebook parameters. Determined by the number of the plurality of TRPs, each set of codebook parameters in the at least one set of codebook parameters includes a number of spatial bases.
17. A communication method, characterized by including:

    The network device determines a second index based on the indexes of M groups of codebook parameters. The second index is used to indicate a combination of indexes of codebook parameters corresponding to each TRP of the N transmission reception points TRP, where M and N are A positive integer, and N is less than or equal to M;

    The network device sends the second index to the terminal device.
18. The method according to claim 17, characterized in that:

    The N TRPs include Q TRPs participating in collaboration, and the index of the codebook parameter corresponding to each TRP in the Q TRPs participating in collaboration is the index of the first Q codebook parameters included in the second index, Q is a positive integer.
19. A communication device, characterized by including:

    Processor, configured to execute a computer program stored in the memory, so that the device performs the method as claimed in any one of claims 1 to 8, or so that the device performs the method as claimed in claim 9 , or, so that the device performs the method as described in any one of claims 10 to 16, or, so that the device performs the method as described in claim 17 or 18.
20. The device of claim 19, further comprising the memory.
21. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium. When the computer program is run on a computer, the device is caused to execute any one of claims 1 to 8. The method of claim 9, or causing the device to perform the method of claim 9, or causing the device to perform the method of any one of claims 10 to 16, or causing the device to The method as claimed in claim 17 or 18 is performed.
22. A computer program product, characterized in that the computer program product includes instructions for executing the method as claimed in any one of claims 1 to 8, or the computer program product includes instructions for executing the method as claimed in any one of claims 1 to 8. 9, or the computer program product includes instructions for performing the method of any one of claims 10 to 16, or the computer program product includes instructions for performing the method of any one of claims 10 to 16. Instructions for the method described in 17 or 18.