CN117676867A

CN117676867A - Communication method and device

Info

Publication number: CN117676867A
Application number: CN202211008186.6A
Authority: CN
Inventors: 张笛笛; 王潇涵; 李婷; 金黄平
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-08-22
Filing date: 2022-08-22
Publication date: 2024-03-08
Also published as: WO2024041212A1

Abstract

A communication method and apparatus. The method comprises the following steps: the terminal equipment receives first indication information from the network equipment, wherein the first indication information is used for indicating the total number of the airspace substrates corresponding to each of a plurality of transmission and reception points TRPs participating in cooperation; the terminal equipment determines a first group of values, wherein each value in the first group of values is the number of airspace substrates corresponding to each TRP in the plurality of TRPs, and the sum of each value in the first group of values is equal to the total number of airspace substrates; the terminal device sends second indication information to the network device, wherein the second indication information is used for indicating the first group of numerical values. According to the method, when the terminal equipment reports the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation to the network equipment, the first group of values can be reported, and the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation can be not required to be reported to the network equipment independently, so that the reporting cost of the terminal equipment can be reduced.

Description

Communication method and device

Technical Field

The present application relates to the field of communications, and more particularly, to a communication method and apparatus.

Background

The fifth generation (the 5th generation,5G) communication system has higher requirements on system capacity, spectrum efficiency and other aspects, and in this scenario, network equipment often needs to acquire channel state information (channel state information, CSI) of an uplink channel and a downlink channel, so as to further ensure performance of the system.

In a frequency division duplex (frequency division duplex-division duplexing, FDD) system, a larger frequency point interval exists between an uplink channel and a downlink channel, and the uplink channel and the downlink channel are not completely reciprocal, so that a network device cannot acquire a complete downlink channel through estimation of the uplink channel, and at this time, a terminal device is required to report CSI of the downlink channel to the network device, so that the network device can reconstruct the downlink channel according to the CSI of the downlink channel, wherein the CSI of the downlink channel includes the number of spatial substrates corresponding to transmission receiving points (transmitting and receiving point, TRP). However, in the cooperative manner of coherent cooperative transmission (coherent joint transmission, cqt), the terminal device needs to report the number of spatial base corresponding to each TRP of the plurality of TRPs participating in the cooperation to the network device separately, thereby increasing the reporting overhead of the terminal device.

Disclosure of Invention

The application provides a communication method and a communication device, which can reduce the reporting cost of terminal equipment without independently reporting the number of airspace substrates corresponding to each TRP in a plurality of TRPs participating in cooperation to network equipment.

In a first aspect, the present application provides a communication method, where an execution body of the method may be a terminal device, or may be a chip applied in the terminal device. The following describes an example in which the execution subject is a terminal device.

The method may include: the terminal equipment receives first indication information from the network equipment, wherein the first indication information is used for indicating the total number of the airspace substrates corresponding to each of a plurality of transmission and reception points TRPs participating in cooperation; the terminal equipment determines a first group of values, wherein each value in the first group of values is the number of airspace substrates corresponding to each TRP in the plurality of TRPs, and the sum of each value in the first group of values is equal to the total number of airspace substrates; the terminal device sends second indication information to the network device, wherein the second indication information is used for indicating the first group of numerical values.

Based on the above technical solution, the terminal device may send second indication information to the network device, where the second indication information is used to indicate the first set of values, so that after the network device receives the second indication information, the number of airspace substrates corresponding to each of the multiple TRPs participating in the cooperation may be determined. According to the method, when the terminal equipment reports the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation to the network equipment, the first group of values can be reported, and the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation can be not required to be reported to the network equipment independently, so that the reporting cost of the terminal equipment can be reduced.

With reference to the first aspect, in certain implementations of the first aspect, the determining, by the terminal device, a first set of values includes: and the terminal equipment determines a first group of values according to at least one group of codebook parameters, wherein each group of codebook parameters in the at least one group of codebook parameters comprises the number of airspace substrates.

In this way, the first set of values may be determined according to at least one set of codebook parameters (e.g., codebook parameters in the R18 cqt codebook), so as to reduce the possible manner in which the terminal device freely selects the number of airspace substrates corresponding to each TRP in the plurality of TRPs participating in the cooperation, and further control the reporting overhead of the terminal device.

With reference to the first aspect, in certain implementations of the first aspect, the second indication information includes a first index, the first index being associated with a first set of values.

Based on the technical scheme, the terminal equipment enables the network equipment to determine the number of airspace substrates corresponding to each TRP in the plurality of TRPs participating in cooperation by sending the first index to the network equipment. According to the method, when the terminal equipment reports the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation to the network equipment, the first index associated with the first group of numerical values can be reported, and the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation can be not required to be reported to the network equipment independently, so that the reporting cost of the terminal equipment can be reduced.

With reference to the first aspect, in certain implementations of the first aspect, the second indication information includes a bitmap associated with an index corresponding to each value in the first set of values.

Based on the technical scheme, the terminal equipment enables the network equipment to determine the number of airspace substrates corresponding to each TRP in the plurality of TRPs participating in cooperation by sending the bitmap to the network equipment. According to the method, when the terminal equipment reports the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation to the network equipment, the bitmap associated with the index corresponding to each of the first group of numerical values can be reported, and the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation can be not required to be reported to the network equipment independently, so that the reporting cost of the terminal equipment can be reduced.

With reference to the first aspect, in certain implementations of the first aspect, the bit number of the bitmap is equal to the group number of the 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 domain bases.

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

Based on the technical scheme, the terminal equipment enables the network equipment to determine the number of airspace substrates corresponding to each TRP in the plurality of TRPs participating in cooperation by sending the combination number to the network equipment. According to the method, when the terminal equipment reports the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation to the network equipment, the number of combinations associated with the indexes corresponding to each of the first group of numerical values can be reported, and the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation does not need to be reported to the network equipment independently, so that the reporting cost of the terminal equipment can be reduced.

With reference to the first aspect, in certain implementations of the first aspect, the number of bits of the combined number is determined according to a number of groups of at least one group of codebook parameters and a number of the plurality of TRPs, each group of codebook parameters in the at least one group of codebook parameters including a number of spatial bases.

With reference to the first aspect, in certain implementation manners of the first aspect, the first indication information is further used to indicate a number of frequency domain substrates corresponding to each of the plurality of TRPs, where the number of frequency domain substrates corresponding to each of the plurality of TRPs is the same.

In a second aspect, the present application provides a communication method, where the execution body of the method may be a terminal device, or may be a chip applied in the terminal device. The following describes an example in which the execution subject is a terminal device.

The method may include: the terminal equipment receives a second index from the network equipment, wherein the second index is used for indicating the combination of indexes of codebook parameters corresponding to each TRP in N Transmission and Reception Points (TRPs); the terminal equipment determines the index of the codebook parameters corresponding to each TRP in the Q TRPs participating in cooperation according to the second index, wherein the N TRPs comprise the Q TRPs, the index of the codebook parameters corresponding to each TRP in the Q TRPs is the index of the first Q codebook parameters included in the second index, and N, Q is a positive integer.

Based on the technical scheme, the terminal equipment can determine the codebook parameters corresponding to each TRP in the Q TRPs participating in cooperation according to the second index, so that the processing complexity of the terminal equipment is reduced.

In a third aspect, the present application provides a communication method, where the execution body of the method may be a terminal device, or may be a chip applied in the terminal device. The following describes an example in which the execution subject is a terminal device.

The method may include: the terminal equipment receives third indication information from the network equipment, wherein the third indication information is used for indicating the proportion of all non-zero combination coefficients corresponding to a plurality of transmission receiving points TRP participating in cooperation to all the combination coefficients; the terminal equipment determines a second group of values, wherein each value in the second group of values is the proportion of a non-zero combination coefficient corresponding to each TRP in the plurality of TRPs to the combination coefficient, and the sum of each value in the second group of values is equal to the proportion of all non-zero combination coefficients to all combination coefficients; the terminal device sends fourth indication information to the network device, wherein the fourth indication information is used for indicating the second group of values.

Based on the above technical solution, the terminal device may send fourth indication information to the network device, where the fourth indication information is used to indicate the second set of values, so that after the network device receives the fourth indication information, it may determine a proportion of the non-zero combination coefficient corresponding to each TRP in the plurality of TRPs participating in the cooperation to the combination coefficient. According to the method, when the terminal equipment reports the proportion of the non-zero combination coefficient corresponding to each TRP in the plurality of TRPs participating in cooperation to the network equipment, the second group of numerical values can be reported, and the proportion of the non-zero combination coefficient corresponding to each TRP in the plurality of TRPs participating in cooperation to the network equipment can be not required to be reported independently, so that the reporting cost of the terminal equipment can be reduced.

With reference to the third aspect, in certain implementations of the third aspect, the terminal device determines a second set of values, including: and the terminal equipment determines a second group of values according to at least one group of codebook parameters, wherein each group of codebook parameters in the at least one group of codebook parameters comprises the proportion of non-zero combination coefficients to the combination coefficients.

In this way, the second set of values may be determined according to at least one set of codebook parameters (e.g., codebook parameters in the R18 cqt codebook), so as to reduce the possible manner in which the terminal device freely selects the number of airspace substrates corresponding to each TRP of the plurality of TRPs participating in the cooperation, and further control the reporting overhead of the terminal device.

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

Based on the above technical solution, the terminal device may send a bitmap to the network device, where the bitmap is associated with an index corresponding to each value in the second set of values, so that after the network device receives the bitmap, it may determine, according to the bitmap, a proportion of a non-zero combination coefficient corresponding to each of the plurality of TRPs participating in cooperation to the combination coefficient. According to the method, when the terminal equipment reports the proportion of the non-zero combination coefficient corresponding to each TRP in the plurality of TRPs participating in cooperation to the network equipment, the bitmap can be reported, and the proportion of the non-zero combination coefficient corresponding to each TRP in the plurality of TRPs participating in cooperation to the combination coefficient can be not required to be reported to the network equipment independently, so that the reporting cost of the terminal equipment can be reduced.

With reference to the third aspect, in certain implementations of the third aspect, the bit number of the bitmap is equal to the group number of the 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.

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

Based on the above technical solution, the terminal device may send a combination number to the network device, where the combination number is associated with an index corresponding to each value in the second set of values, so that after the network device receives the combination number, it may determine, according to the combination number, a proportion of a non-zero combination coefficient corresponding to each of the plurality of TRPs participating in cooperation to the combination coefficient. According to the method, when the terminal equipment reports the proportion of the non-zero combination coefficient corresponding to each of the plurality of TRPs participating in cooperation to the combination coefficient to the network equipment, the combination number can be reported, and the proportion of the non-zero combination coefficient corresponding to each of the plurality of TRPs participating in cooperation to the combination coefficient can be not required to be reported to the network equipment independently, so that the reporting cost of the terminal equipment can be reduced.

With reference to the third aspect, in certain implementations of the third aspect, the number of bits of the combination number is determined according to a number of groups of at least one group of codebook parameters and a number of the plurality of TRPs, 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.

With reference to the third aspect, in some implementations of the third aspect, the third indication information is further used to indicate a number of frequency domain substrates corresponding to each of the plurality of TRPs, where the number of frequency domain substrates corresponding to each of the plurality of TRPs is the same.

In a fourth aspect, the present application provides a communication method, where the execution body of the method may be a terminal device, or may be a chip applied in the terminal device. The following describes an example in which the execution subject is a terminal device.

The method may include: the terminal equipment receives fifth indication information from the network equipment, wherein the fifth indication information is used for indicating the total number P of the airspace substrates and the total number L of the airspace substrates corresponding to each of a plurality of transmission receiving points TRP participating in cooperation, and P, L is a positive integer; when the terminal equipment determines the number of spatial domain substrates corresponding to each TRP in the plurality of TRPs, the number of bits of the number of bits isThe terminal device transmits the number of bits to the network device.

Based on the above technical solution, the terminal device may send the number of bits to the network device, so that after the network device receives the number of bits, the number of spatial base corresponding to each of the plurality of TRPs participating in the cooperation may be determined according to the number of bits. According to the method, when the terminal equipment reports the number of the airspace substrates corresponding to each TRP in the plurality of TRPs to the network equipment, the number of bits can be reported, and the number of the airspace substrates corresponding to each TRP in the plurality of TRPs can be independently reported to the network equipment without the need of reporting the number of the airspace substrates corresponding to each TRP in the plurality of TRPs, so that the reporting cost of the terminal equipment can be reduced.

In a fifth aspect, the present application provides a communication method, where the method may be executed by a network device, or may be a chip applied in the network device. The following describes an example in which the execution subject is a network device.

The method may include: the network equipment determines a first group of values, wherein each value in the first group of values is the number of airspace substrates corresponding to each TRP in a plurality of Transmission and Reception Points (TRPs) participating in cooperation; the network device sends second indication information to the terminal device, wherein the second indication information is used for indicating the first group of values.

Based on the above technical solution, the network device may determine the firstAnd transmitting the first set of values to the terminal device. By the method, the reserved cost of the network equipment can be prevented from being wasted, the terminal equipment can determine the number of airspace substrates corresponding to each TRP in the plurality of TRPs participating in cooperation according to the first group of values after acquiring the first group of values without sending the first group of values to the network equipment, so that codebook structure information such as airspace selection matrix W can be reported to the network equipment ₁ Corresponding indication information, frequency domain compression matrix W _f Corresponding indication information, combination coefficient W ₂ The parameters such as non-zero combination coefficient in the method and the system further reduce the processing complexity of terminal equipment and the reporting cost.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the network device determining the first set of values includes: the network device determines a first 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 number of airspace substrates.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the second indication information includes a first index, the first index being associated with the first set of values.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the second indication information includes a bitmap associated with an index corresponding to each value in the first set of values.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the bit number of the bitmap is equal to the group number 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 domain bases.

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

With reference to the fifth aspect, in certain implementations of the fifth aspect, the number of bits of the combined number is determined according to a number of groups of at least one group of codebook parameters and a number of TRPs, each group of codebook parameters in the at least one group of codebook parameters including a number of spatial bases.

In a sixth aspect, the present application provides a communication method, where the method may be executed by a network device, or may be a chip applied to the network device. The following describes an example in which the execution subject is a network device.

The method may include: the network equipment determines a second index according to indexes of M groups of codebook parameters, wherein the second index is used for indicating the combination of indexes of codebook parameters corresponding to each TRP in N transmission and reception points TRP, M, N is a positive integer, and N is smaller 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 may send a second index to the terminal device, where the second index is used to indicate a combination of indexes of codebook parameters corresponding to each of the N TRPs, so that after the terminal device receives the second index, the terminal device may obtain the codebook parameters corresponding to each of the N TRPs. By the method, when the network equipment indicates the codebook parameters corresponding to each TRP in the N TRPs to the terminal equipment, the second index can be sent to the terminal equipment, and the network equipment does not need to independently indicate the codebook parameters corresponding to each TRP in the N TRPs to the terminal equipment, so that the indication overhead of the network equipment can be reduced.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the N TRPs include Q TRPs involved in cooperation, an index of codebook parameters corresponding to each of the Q TRPs involved in cooperation is an index of the first Q codebook parameters included in the second index, and Q is a positive integer.

In a seventh aspect, the present application provides a communication method, where the execution body of the method may be a network device, or may be a chip applied in the network device. The following describes an example in which the execution subject is a network device.

The method may include: the network equipment determines a second group of values, wherein each value in the second group of values is the proportion of a 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, wherein the fourth indication information is used for indicating the second group of values.

Based on the technical scheme, the netThe network device may determine a second set of values and send the second set of values to the terminal device. By the method, the reserved cost of the network equipment can be prevented from being wasted, the terminal equipment can determine the proportion of the non-zero combination coefficient corresponding to each TRP in the plurality of TRPs participating in cooperation to the combination coefficient according to the second group of values after acquiring the second group of values without sending the second group of values to the network equipment, so that codebook structure information such as a port selection matrix W can be reported to the network equipment ₁ Corresponding indication information, frequency domain compression matrix W _f Corresponding indication information, combination coefficient W ₂ The parameters such as non-zero combination coefficient in the method and the system further reduce the processing complexity of terminal equipment and the reporting cost.

With reference to the seventh aspect, in certain implementations of the seventh aspect, the network device determining the second set of values includes: the network device determines a 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 proportion of non-zero combining coefficients to the combining coefficients.

With reference to the seventh aspect, in certain implementations of the seventh aspect, the fourth indication information includes a bitmap, the bitmap being associated with an index corresponding to each value in the second set of values.

With reference to the seventh aspect, in certain implementations of the seventh aspect, the bit number of the bitmap is equal to the group number of the 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.

With reference to the seventh aspect, in certain implementations of the seventh aspect, the fourth indication information includes a combination number, the combination number being associated with an index corresponding to each value in the second set of values.

With reference to the seventh aspect, in certain implementations of the seventh aspect, the number of bits of the combination number is determined according to a number of groups of at least one group of codebook parameters and a number of TRPs, 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.

An eighth aspect provides a communication device for performing the method of any of the possible implementations of the first to seventh aspects. In particular, the apparatus may comprise means and/or modules, such as a processing unit and/or a communication unit, for performing the method in any of the possible implementations of the first to seventh aspects.

With reference to the eighth aspect, in certain implementations of the eighth aspect, the apparatus is a terminal device or a network device. When the apparatus 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.

With reference to the eighth aspect, in certain implementations of the eighth aspect, the apparatus is a chip, a system-on-chip, or a circuit for a terminal device or a network device. When the apparatus is a chip, a system-on-chip or a circuit for a terminal device or a network device, the communication unit may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit or the like on the chip, the system-on-chip or the circuit; the processing unit may be at least one processor, processing circuit or logic circuit, etc.

In a ninth aspect, there is provided a communication apparatus comprising: at least one processor configured to execute a computer program or instructions stored in a memory to perform a method according to any one of the possible implementations of the first to seventh aspects. Optionally, the apparatus further comprises a memory for storing a computer program or instructions. Optionally, the apparatus further comprises a communication interface through which the processor reads the computer program or instructions stored in the memory.

With reference to the ninth aspect, in some implementations of the ninth aspect, the apparatus is a terminal device or a network device.

With reference to the ninth aspect, in certain implementations of the ninth aspect, the apparatus is a chip, a system-on-chip, or a circuit for a terminal device or a network device.

In a tenth aspect, the present application provides a processor configured to perform the method provided in the above aspects.

The operations such as transmitting and acquiring/receiving, etc. related to the processor may be understood as operations such as outputting and receiving, inputting, etc. by the processor, or may be understood as operations such as transmitting and receiving by the radio frequency circuit and the antenna, if not specifically stated, or if not contradicted by actual function or inherent logic in the related description, which is not limited in this application.

In an eleventh aspect, a computer readable storage medium is provided, the computer readable storage medium storing program code for device execution, the program code comprising instructions for performing the method of any one of the possible implementations of the first to seventh aspects.

In a twelfth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of any one of the possible implementations of the first to seventh aspects described above.

In a thirteenth aspect, the present application also provides a system comprising a terminal device operable to perform the steps performed by the terminal device in any of the methods of the first to fourth aspects above.

With reference to the thirteenth aspect, in certain implementations of the thirteenth aspect, the system may further include a network device, where the network device is configured to perform the steps performed by the network device in the fifth to seventh aspects.

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

Drawings

Fig. 1 shows a schematic diagram of a communication scenario suitable for use in embodiments of the present application.

Fig. 2 shows a schematic diagram of a communication method 200 according to an embodiment of the present application.

Fig. 3 shows a schematic diagram of a communication method 300 according to an embodiment of the present application.

Fig. 4 shows a schematic diagram of a communication method 400 according to an embodiment of the present application.

Fig. 5 shows a schematic diagram of a communication method 500 according to an embodiment of the present application.

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

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

Fig. 8 shows a schematic diagram of a chip system 800 according to an embodiment of the present application.

Detailed Description

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

The technical solution of the embodiment of the application can be applied to various communication systems, for example: fifth generation (5th generation,5G) or New Radio (NR) systems, long term evolution (long term evolution, LTE) systems, LTE frequency division duplex (frequency division duplex, FDD) systems, LTE time division duplex (time division duplex, TDD) systems, and the like. The technical scheme provided by the application can also be applied to future communication systems, such as a sixth generation mobile communication system. The technical solutions provided herein may also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (machine to machine, M2M) communication, machine type communication (machine type communication, MTC), and 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 a user, for example, a handheld device having a wireless connection function, an in-vehicle device, or the like. Currently, some examples of terminals are: a mobile phone, tablet, laptop, palmtop, mobile internet device (mobile internet device, MID), wearable device, virtual Reality (VR) device, augmented reality (augmented reality, AR) device, wireless terminal in industrial control (industrial control), wireless terminal in unmanned (self driving), wireless terminal in teleoperation (remote medical surgery), wireless terminal in smart grid (smart grid), wireless terminal in transportation security (transportation safety), wireless terminal in smart city (smart city), wireless terminal in smart home (smart home), cellular phone, cordless phone, session initiation protocol (session initiation protocol, SIP) phone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication function, computing device or other processing device connected to wireless modem, wearable device, terminal device in 5G network or terminal in future evolved land mobile communication network (public land mobile network), and the like, without limiting the present application.

By way of example, and not limitation, in embodiments of the present application, the terminal device may also be a wearable device. The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wear by applying wearable technology and developing wearable devices, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.

In addition, in the embodiment of the application, the terminal device may also be a terminal device in an IoT system, where IoT is an important component of future information technology development, and the main technical feature is to connect the article with a network through a communication technology, so as to implement man-machine interconnection and an intelligent network for interconnecting the articles.

In the embodiment of the present application, the device for implementing the function of the terminal device may be the terminal device, or may be a device capable of supporting the terminal device to implement the function, for example, a chip system or a chip, and the device may be installed in the terminal device. In the embodiment of the application, the chip system may be formed by a chip, and may also include a chip and other discrete devices.

The network device in this embodiment of the present application may be a device for communicating with a terminal device, which may be a base station (base transceiver station, BTS) in a global system for mobile communications (global system for mobile communications, GSM) or code division multiple access (code division multiple access, CDMA), a base station (NodeB, NB) in a wideband code division multiple access (wideband code division multiple access, WCDMA) system, an evolved NodeB (eNB or eNodeB) in an LTE system, a wireless controller in a cloud wireless access network (cloud radio access network, CRAN) scenario, or a network device in a relay station, an access point, an in-vehicle device, a wearable device, and a 5G network, or a network device in a future evolution PLMN network, one or a group of base stations (including a plurality of antenna panels) in a 5G system, or a network node that forms a gNB or a transmission point, such as a baseband unit (BBU), or a Distributed Unit (DU), or the embodiment of the present application is not limited.

In some deployments, the gNB may include a Centralized Unit (CU) and DUs. The gNB may also include an active antenna unit (active antenna unit, AAU). The CU implements part of the functionality of the gNB and the DU implements part of the functionality of the gNB. For example, the CU is responsible for handling non-real time protocols and services, implementing the functions of the radio resource control (radio resource control, RRC), packet data convergence layer protocol (packet data convergence protocol, PDCP) layer. The DUs are responsible for handling physical layer protocols and real-time services, implementing the functions of the radio link control (radio link control, RLC), medium access control (media access control, MAC) and Physical (PHY) layers. The AAU realizes part of physical layer processing function, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer may eventually become information of the PHY layer or be converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the du+aau. It is understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (radio access network, RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

In the embodiment of the application, the terminal device or the network device includes a hardware layer, an operating system layer running above the hardware layer, and an application layer running above the operating system layer. The hardware layer includes hardware such as a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address book, word processing software, instant messaging software and the like. Further, the embodiment of the present application is not particularly limited to the specific structure of the execution body of the method provided in the embodiment of the present application, as long as the communication can be performed by the method provided in the embodiment of the present application by running the program recorded with the code of the method provided in the embodiment of the present application, and for example, the execution body of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call the program and execute the program.

Fig. 1 shows a schematic diagram of a communication scenario suitable for use in embodiments of the present application. The communication system in fig. 1 may include at least one terminal device (e.g., 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 configured to provide a communication service for a terminal device and access the core network, and the terminal device may access the network by searching for a synchronization signal, a broadcast signal, etc. transmitted by the network device 170, thereby establishing communication with the network device. Terminal device 110, terminal device 120, terminal device 130, terminal device 140, and terminal device 160 in fig. 1 may perform uplink and downlink transmission with network device 170. For example, the network device 170 may transmit 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 may also receive uplink data transmitted by the terminal device 110, the terminal device 120, the terminal device 130, the terminal device 140, and the terminal device 160.

In addition, the terminal device 140, the terminal device 150, and the terminal device 160 may be regarded as one communication system, and the terminal device 160 may transmit downlink data to the terminal device 140 and the terminal device 150, or may receive uplink data transmitted by the terminal device 140 and the terminal device 150.

It should be appreciated that the network devices included in the communication system may be one or more. A network device may transmit data to one or more terminal devices. Multiple network devices may also transmit data to one or more terminal devices simultaneously.

The 5G communication system has higher requirements on system capacity, spectrum efficiency, and the like, and in this scenario, the network device often needs to acquire channel state information (channel state information, CSI) of an uplink channel and a downlink channel to ensure performance of the system.

In an FDD system, a larger frequency point interval exists between an uplink channel and a downlink channel, the uplink channel and the downlink channel are not completely reciprocal, and a network device cannot acquire a complete downlink channel through estimation of the uplink channel, and at this time, a terminal device is required to report CSI of the downlink channel to the network device, so that the network device can reconstruct the downlink channel according to the CSI of the downlink channel. The basic flow of reporting the CSI of the downlink channel to the network device by the terminal device may include the following steps:

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

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

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

Wherein, the RS information is used for downlink channel measurement.

And thirdly, the terminal equipment measures the downlink channel according to the configuration information and the RS information, so that the CSI of the downlink channel is obtained.

And fourthly, reporting the CSI of the downlink channel to the network equipment by the terminal equipment.

Fifthly, the network equipment reconstructs the downlink channel according to the CSI of the downlink channel.

In the FDD system, although there is incomplete reciprocity between the uplink channel and the downlink channel, part of information between the uplink channel and the downlink channel has reciprocity, such as reciprocity of angle and reciprocity of delay. Based on the above, the terminal device may obtain the CSI of the downlink channel according to the reciprocity of the partial 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 may reconstruct the downlink channel according to the CSI of the downlink channel. The basic flow of reporting the CSI of the downlink channel to the network device by the terminal device according to the reciprocity of part of the information between the uplink channel and the downlink channel may include the following steps:

the method comprises the steps that firstly, network equipment carries out channel estimation on an uplink channel, and partial information of a downlink channel is obtained according to estimated uplink channel information, such as angle information and time delay information of the downlink channel;

And a second step, the network equipment sends RS information to the terminal equipment.

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

And thirdly, the terminal equipment measures the downlink channel according to the RS information, so that the CSI of the downlink channel is obtained.

Fifthly, the network equipment reconstructs the downlink channel according to the CSI of the downlink channel, the angle information and the time delay information of the downlink channel.

In the embodiment of the present application, the CSI of the downlink channel includes some indication information of codebook reconstruction, and the network may complete reconstruction of the precoding matrix or the channel matrix according to the indication information fed back by the terminal. Three-level codebook structure corresponding to R16 eTypeII and R17FeTypeIIFor the R16 eTypeII codebook, W ₁ ∈N ^P×2L Selecting a matrix for the airspace, namely selecting 2L beams from P airspace beams; />Is a frequency domain compressed matrix, i.e. representing the selection of M columns, N from a set of discrete Fourier transform (discrete fourier transform, DFT) matrices ₃ The number of resources or the number of sub-bands of a frequency domain Resource Block (RB); w (W) ₂ ∈C ^2L×M Is a combined coefficient quantized according to a quantization criterion. For the R17FeTypeII codebook, < > >Selecting a matrix for a port, i.e. representing the selection of K from P ports ₁ A plurality of ports;is a frequency domain compressed matrix, i.e. represents selecting M columns, N from a DFT matrix set ₃ The number of resources or the number of sub-bands of the frequency domain RB; />Is a combined coefficient quantized according to a quantization criterion.

When the terminal device reports CSI of the downlink channel to the network device, codebook structure information may be reported in uplink control information (uplink control information, UCI). For example, for the R16 ettypelii NP codebook, the terminal device may report the spatial selection matrix W in UCI ₁ Corresponding indication information, frequency domain compression matrix W _f Corresponding indication information, combination coefficient W ₂ Non-zero combination coefficient of the same parametersA number; for another example, for the R17 FeTypeII PS codebook, the terminal device may report the port selection matrix W in UCI ₁ Corresponding indication information, frequency domain compression matrix W _f Corresponding indication information, combination coefficient W ₂ Non-zero combination coefficients, etc.

In order to further improve the performance of the system, the terminal device may report CSI of the downlink channel to the network device in a multi-station cooperation manner, where the CSI of the downlink channel includes the number of spatial domain substrates corresponding to the transmission and reception points (transmitting and receiving point, TRP). There are various ways of multi-station cooperation, such as coherent cooperation transmission (coherent joint transmission, CJT), incoherent cooperation transmission (non-coherent joint transmission, NCJT), etc. For the R18 CJT codebook, the difference of the distance between the TRP participating in the cooperation and the terminal equipment may cause a larger difference of channels between the TRP participating in the cooperation and the terminal equipment, when the terminal equipment selects the number of the airspace substrates corresponding to each of the TRPs participating in the cooperation, the number of the airspace substrates corresponding to each of the different TRPs may have a larger difference, and at this time, the terminal equipment needs to report the number of the airspace substrates corresponding to each of all the TRPs participating in the cooperation to the network equipment independently, thereby increasing the reporting overhead of the terminal equipment.

In view of the above technical problems, the present application provides a communication method, by which a terminal device may not need to report, to a network device, the number of airspace substrates corresponding to each TRP in all TRPs participating in cooperation, so as to reduce reporting overhead of the terminal device.

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

It should be understood that TRP is mentioned multiple times in the embodiments of the present application, and it is understood that when there are multiple pilot (channel state information-reference signaling, CSI-RS) resources for measuring CSI, there is a one-to-one correspondence between the multiple CSI-RS resources and the multiple TRP; when there is one CSI-RS resource, the one CSI-RS resource has a plurality of antenna ports, the plurality of antenna ports may be equally allocated to each TRP, the number of antenna ports obtained by each TRP forms an antenna port group, the number of antenna ports obtained by the plurality of TRPs forms a plurality of antenna port groups, and the plurality of antenna port groups and the plurality of TRPs are in one-to-one correspondence.

Fig. 2 shows a schematic diagram of a communication method 200 according to an embodiment of the present application. As shown in fig. 2, method 200 may include the following steps.

210, the terminal device receives first indication information from the network device, where the first indication information is used to indicate a total number of spatial domain substrates corresponding to each of the multiple transmission and reception points TRP participating in the cooperation.

For example, assuming that there are three TRPs involved in the cooperation, denoted as TRP1, TRP2, TRP3, respectively, the terminal device may receive first indication information from the network device, the first indication information being used to indicate the total number of respective spatial domain substrates corresponding to TRP1, TRP2 and TRP 3.

It should be understood that the total number of spatial substrates corresponding to each of the plurality of TRPs involved in the cooperation is the total number of spatial substrates selected by the plurality of TRPs involved in the cooperation.

Based on step 210, the manner in which the terminal device obtains the total number of spatial domain substrates corresponding to each of the plurality of TRPs involved in the cooperation may further include: the terminal equipment can also receive first indication information from the network equipment, wherein the first indication information is used for indicating the average airspace base number corresponding to each TRP in a plurality of TRPs participating in cooperation; and the terminal equipment determines the total number of the spatial substrates corresponding to each of the plurality of TRPs participating in cooperation according to the average number of the spatial substrates.

Based on step 210, the manner in which the terminal device obtains the total number of spatial domain substrates corresponding to each of the plurality of TRPs involved in the cooperation may further include: the terminal equipment can also receive first indication information from the network equipment, wherein the first indication information is used for indicating the number of airspace substrates corresponding to each TRP in a plurality of TRPs participating in cooperation; the terminal equipment determines the total number of the airspace substrates corresponding to each of the TRPs participating in the cooperation according to the number of airspace substrates corresponding to each of the TRPs participating in the cooperation.

220, the terminal device determines a first set of values, where each value in the first set of values is a number of spatial substrates corresponding to each TRP in the plurality of TRPs, and a sum of each value in the first set of values is equal to a total number of spatial substrates.

It should be understood that the number of spatial domain substrates corresponding to each TRP of the plurality of TRPs participating in the cooperation may be the same or different, which is not limited in the embodiments of the present application.

The terminal device determines the first set of values in several ways.

In the mode #A, the terminal equipment allocates the corresponding number of the airspace substrates to each TRP in the plurality of TRPs participating in cooperation according to the total number of the airspace substrates.

The terminal device may be configured to allocate the corresponding number of spatial domain substrates to each of the plurality of TRPs participating in the cooperation, or may be configured according to a certain rule, which is not limited in the embodiment of the present application.

For example, assuming that there are three TRPs involved in the cooperation, which are respectively denoted as TRP1, TRP2 and TRP3, the first indication information indicates that the total number of spatial substrates corresponding to TRP1, TRP2 and TRP3 is 16, the terminal device may allocate the number of spatial substrates corresponding to TRP1, TRP2 and TRP3 to 5, 6 and 5.

For example, assuming that there are two TRPs involved in the cooperation, respectively denoted as TRP1 and TRP2, and the first indication information indicates that the total number of spatial substrates corresponding to TRP1 and TRP2 is 10, the terminal device may allocate the number of spatial substrates corresponding to TRP1 and TRP2 to 3 and 7, respectively.

In the mode #B, the terminal equipment allocates the corresponding number of the airspace substrates to each TRP in the plurality of TRPs participating in the cooperation according to the total number of the airspace substrates and the channel quality of the plurality of TRPs participating in the cooperation.

For example, assuming that three TRPs participating in the cooperation are respectively denoted as TRP1, TRP2 and TRP3, the first indication information indicates that the total number of spatial substrates corresponding to TRP1, TRP2 and TRP3 is 16, and assuming that the channel quality of TRP1 is good, the terminal device may allocate the number of spatial substrates corresponding to TRP1, TRP2 and TRP3 to be 10, 3 and 3.

In this way, the TRP with better channel quality can be separated into more airspace substrates, so that the performance of the system can be improved.

In the mode #C, the terminal equipment allocates the corresponding number of the airspace substrates to each TRP in the plurality of TRPs participating in the cooperation according to the total number of the airspace substrates and the combined coefficient power of the plurality of TRPs participating in the cooperation.

For example, assuming that three TRPs participating in the cooperation are respectively denoted as TRP1, TRP2 and TRP3, the first indication information indicates that the total number of spatial substrates corresponding to TRP1, TRP2 and TRP3 is 16, and assuming that the combined coefficient power of TRP1 is larger, the terminal device may allocate the number of spatial substrates corresponding to TRP1, TRP2 and TRP3 to be 10, 3 and 3.

In this way, more space domain substrates can be separated by the TRP with larger combined coefficient power, so that the performance of the system can be improved.

In mode #D, the terminal equipment determines a first group of values according to at least one group of codebook parameters, and each group of codebook parameters in the at least one group of codebook parameters comprises the number of airspace substrates.

Wherein, at least one group of codebook parameters may be codebook parameters in the R18 CJT codebook.

It should be understood that the R18 cqt codebook may be enhanced by an existing R16 eTypeII NP codebook, or the existing R16 eTypeII NP codebook may be directly used as the R18 cqt codebook, which is not limited in the embodiments of the present application.

It should also be understood that, when the R16 eTypeII NP codebook is enhanced to obtain the R18 cqt codebook, it may be understood that, for TRPs with better channel states among TRPs participating in cooperation, the TRPs of this type tend to have a greater influence on the cooperation performance, so that a greater number of airspace substrates may be allocated to the TRPs of this type. At this time, the R16 ettypelii NP codebook may be enhanced to obtain an R18 cqt codebook, where at least one set of codebook parameters in the R18 cqt codebook may include a larger number of airspace bases.

The following examples illustrate enhancement of the existing R16 eTypeII NP codebook to obtain the R18 CJT codebook. The description of the existing R16 eTypeII NP codebook as the R18 CJT codebook is similar to the description of the enhancement of the existing R16 eTypeII NP codebook to obtain the R18 CJT codebook, and will not be repeated here.

Table 1 shows an R18 cqt single-station codebook parameter combination, which may be obtained by adding a partial codebook parameter list to the codebook parameters in the R16eTypeII NP codebook, for example, adding a codebook parameter combination corresponding to a larger or smaller spatial base number l=8 or l=1, and herein, the codebook parameter indication method is illustrated by taking the codebook parameter combination list added with l=8 as an example.

Table 1R 18 CJT single TRP codebook parameter combination list

As shown in table 1, L is the number of airspace substrates;is the number of frequency domain substrates, wherein v is the number of layers, N ₃ Indicating (precoding matrix indicator, PMI) the number of sub-bands for a precoding matrix, wherein R is the number of PMI sub-bands contained in each channel state indication (channel quality indicator, CQI) sub-band; beta is the ratio of the non-zero combination coefficients of a single TRP to the combination coefficients.

Table 1 gives 10 sets of codebook parameters, which can be denoted as index 1 to index 10, respectively, where, the numbers of the airspace substrates included in the indexes 1 to 10 are respectively 2, 4, 6, 8 and 8, index 9 and index 10 are two sets of codebook parameters added to the codebook parameters in the R16eTypeII NP codebook.

For example, assuming that three TRPs involved in the cooperation are respectively denoted as TRP1, TRP2 and TRP3, and the first indication information indicates that the total number of spatial substrates corresponding to TRP1, TRP2 and TRP3 is 16, the terminal device may determine that the number of spatial substrates corresponding to TRP1, TRP2 and TRP3 is 2, 6 and 8 according to codebook parameters corresponding to index 1, index 8 and index 9, respectively.

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

Based on step 230, when the second indication information indicates the first set of values, there may be several ways as follows.

In mode #E, the second indication information includes a first index associated with the first set of values.

For example, assuming that there are four TRPs involved in the cooperation, which are respectively denoted as TRP1, TRP2, TRP3, and TRP4, and the first indication information indicates that the total number of the spatial substrates corresponding to TRP1, TRP2, TRP3, and TRP4 is 16, the possible manners in which TRP1, TRP2, TRP3, and TRP4 are allocated to the numbers of the spatial substrates corresponding to each may be as shown in table 2, and the sum of the numbers of the spatial substrates corresponding to each of TRP1, TRP2, TRP3, and TRP4 is equal to 16.

TABLE 2 possible modes when TRP1, TRP2, TRP3, TRP4 are allocated the number of spatial substrates corresponding to each other

Index	L1	L2	L3	L4
					0	9	5	2	2
1	7	4	4	2
					2	3	3	3	3
3	4	4	4	4
					4	5	5	5	5
5	7	7	2	2

As shown in table 2, L1, L2, L3, and L4 may be indexes of numbers of spatial substrates corresponding to TRP1, TRP2, TRP3, and TRP4, respectively. The index of the number of spatial bases may correspond to the index in table 1. By the correspondence between the index of the number of spatial substrates and the index in table 1, a possible way of allocating the respective corresponding number of spatial substrates to TRP1, TRP2, TRP3, TRP4 can be obtained. For example, for index 0 in table 2, if the index of the number of spatial base pairs corresponding to TRP1 is 9, the index of the number of spatial base pairs corresponding to TRP1 corresponds to index 9 in table 1, and from index 9 in table 1, the number of spatial base pairs corresponding to TRP1 is 8; if the index of the number of spatial substrates corresponding to TRP2 is 5, the index of the number of spatial substrates corresponding to TRP2 corresponds to index 5 in table 1, and the number of spatial substrates corresponding to TRP2 can be obtained from index 5 in table 1 as 4; if the index of the number of spatial substrates corresponding to TRP3 is 2, the index of the number of spatial substrates corresponding to TRP3 corresponds to index 2 in table 1, and the number of spatial substrates corresponding to TRP3 can be obtained from index 2 in table 1 as 2; when the index of the number of spatial base corresponding to TRP4 is 2, the index of the number of spatial base corresponding to TRP4 corresponds to index 2 in table 1, and the number of spatial base corresponding to TRP4 can be obtained from index 2 in table 1 as 2. That is, for index 0 in table 2, the possible ways to allocate the numbers of spatial substrates corresponding to TRP1, TRP2, TRP3, TRP4 are: the numbers of the spatial domain substrates corresponding to the TRP1, the TRP2, the TRP3 and the TRP4 are respectively 8, 4, 2 and 2, so that the sum of the numbers of the spatial domain substrates corresponding to the TRP1, the TRP2, the TRP3 and the TRP4 is equal to 16. Other possible ways when TRP1, TRP2, TRP3, TRP4 are allocated to the corresponding number of spatial substrates can be obtained by at least one of index 1 to index 5 in table 2, and specific methods can refer to index 0 in table 2, and will not be described here.

Illustratively, the first index may be one of index 0 through index 5 in table 2. For example, when the first set of values is 9, 5, 2, the first index may be index 0; for another example, when the first set of values is 7, 4, 2, the first index may be index 1.

For example, assuming that three TRPs involved in the cooperation are respectively designated as TRP1, TRP2 and TRP3, and the first indication information indicates that the total number of the spatial substrates corresponding to TRP1, TRP2 and TRP3 is 12, the possible ways in which TRP1, TRP2 and TRP3 are allocated to the numbers of the spatial substrates corresponding to each of TRP1, TRP2 and TRP3 may be as shown in table 3, and the sum of the numbers of the spatial substrates corresponding to each of TRP1, TRP2 and TRP3 is equal to 12.

TABLE 3 possible ways in which TRP1, TRP2, TRP3 assign the number of spatial substrates corresponding to each other

Index	L1	L2	L3
				0	9	2	2
1	7	4	2
				2	4	4	4
3	3	3	3
				4	5	5	5

As shown in table 3, L1, L2, L3 may be indexes of numbers of spatial substrates corresponding to TRP1, TRP2, TRP3, respectively, and the indexes of numbers of spatial substrates may correspond to the indexes in table 1. By the correspondence between the index of the number of spatial substrates and the index in table 1, a possible way of allocating the respective corresponding number of spatial substrates to TRP1, TRP2, TRP3 can be obtained. For example, for index 0 in table 3, if the index of the number of spatial base pairs corresponding to TRP1 is 9, the index of the number of spatial base pairs corresponding to TRP1 corresponds to index 9 in table 1, and from index 9 in table 1, the number of spatial base pairs corresponding to TRP1 is 8; if the index of the number of spatial substrates corresponding to TRP2 is 2, the index of the number of spatial substrates corresponding to TRP2 corresponds to index 2 in table 1, and the number of spatial substrates corresponding to TRP2 can be obtained from index 2 in table 1 as 2; when the index of the number of spatial base corresponding to TRP3 is 2, the index of the number of spatial base corresponding to TRP3 corresponds to index 2 in table 1, and the number of spatial base corresponding to TRP3 can be obtained from index 2 in table 1 as 2. That is, for index 0 in table 3, the possible ways to allocate the numbers of spatial substrates corresponding to TRP1, TRP2, TRP3 are: the numbers of the spatial domain substrates corresponding to the TRP1, the TRP2 and the TRP3 are 8, 2 and 2 respectively, so that the sum of the numbers of the spatial domain substrates corresponding to the TRP1, the TRP2 and the TRP3 is equal to 12. Other possible ways of allocating the corresponding space domain base numbers to TRP1, TRP2, TRP3 may also be obtained by at least one of index 1 to index 4 in table 3, and specific methods may refer to index 0 in table 3, which will not be described herein.

Illustratively, the first index may be one of index 0 through index 4 in table 3. For example, when the first set of values is 9, 2, the first index may be index 0; for another example, when the first set of values is 7, 4, 2, the first index may be index 1.

In example three, assuming that three TRPs involved in the cooperation are respectively designated as TRP1, TRP2 and TRP3, and the first indication information indicates that the total number of the spatial substrates corresponding to TRP1, TRP2 and TRP3 is 8, the possible manner in which TRP1, TRP2 and TRP3 are allocated to the numbers of the spatial substrates corresponding to each of them may be as shown in table 4, and the sum of the numbers of the spatial substrates corresponding to each of TRP1, TRP2 and TRP3 is equal to 8.

TABLE 4 possible ways in which TRP1, TRP2, TRP3 assign the number of spatial substrates corresponding to each other

Index	L1	L2	L3
				0	4	2	2
1	3	1	1

As shown in table 4, L1, L2, L3 may be indexes of numbers of spatial substrates corresponding to TRP1, TRP2, TRP3, respectively, and the indexes of numbers of spatial substrates may correspond to the indexes in table 1. By the correspondence between the index of the number of spatial substrates and the index in table 1, a possible way of allocating the respective corresponding number of spatial substrates to TRP1, TRP2, TRP3 can be obtained. For example, for index 0 in table 4, if the index of the number of spatial base pairs corresponding to TRP1 is 4, the index of the number of spatial base pairs corresponding to TRP1 corresponds to index 4 in table 1, and from index 4 in table 1, the number of spatial base pairs corresponding to TRP1 is 4; if the index of the number of spatial substrates corresponding to TRP2 is 2, the index of the number of spatial substrates corresponding to TRP2 corresponds to index 2 in table 1, and the number of spatial substrates corresponding to TRP2 can be obtained from index 2 in table 1 as 2; when the index of the number of spatial base corresponding to TRP3 is 2, the index of the number of spatial base corresponding to TRP3 corresponds to index 2 in table 1, and the number of spatial base corresponding to TRP3 can be obtained from index 2 in table 1 as 2. That is, for index 0 in table 4, the possible ways to allocate the numbers of spatial substrates corresponding to TRP1, TRP2, TRP3 are: the numbers of the spatial domain substrates corresponding to the TRP1, the TRP2 and the TRP3 are respectively 4, 2 and 2, so that the sum of the numbers of the spatial domain substrates corresponding to the TRP1, the TRP2 and the TRP3 is equal to 8. Other possible ways when TRP1, TRP2, TRP3 are allocated to the corresponding number of spatial domains can be obtained by the index 1 in table 4, and specific methods can refer to the index 0 in table 4, and will not be described here.

Illustratively, the first index may be index 0 or index 1 in table 4. For example, when the first set of values is 4, 2, the first index may be index 0; for another example, when the first set of values is 3, 1, the first index may be index 1.

In example three, assuming that there are two TRPs involved in the cooperation, respectively denoted as TRP1 and TRP2, and the first indication information indicates that the total number of spatial substrates corresponding to TRP1 and TRP2 is 8, a possible manner when TRP1 and TRP2 allocate the number of spatial substrates corresponding to each may be as shown in table 5, and the sum of the numbers of spatial substrates corresponding to TRP1 and TRP2 is equal to 8.

TABLE 5 possible modes for allocating TRP1 and TRP2 to the corresponding space domain base numbers

Index	L1	L2
			0	3	3
1	4	4
			2	5	5
3	7	2

As shown in table 5, L1 and L2 may be indexes of numbers of spatial base corresponding to TRP1 and TRP2, respectively, and the indexes of numbers of spatial base may correspond to the indexes in table 1. The possible ways of allocating the corresponding number of the airspace substrates to the TRP1 and the TRP2 can be obtained through the corresponding relation between the index of the airspace substrate number and the index in the table 1. For example, for index 0 in table 5, if the index of the number of spatial base pairs corresponding to TRP1 is 3, the index of the number of spatial base pairs corresponding to TRP1 corresponds to index 3 in table 1, and from index 3 in table 1, the number of spatial base pairs corresponding to TRP1 is 4; if the index of the number of spatial base corresponding to TRP2 is 3, the index of the number of spatial base corresponding to TRP2 corresponds to index 3 in table 1, and the number of spatial base corresponding to TRP2 is 4 from index 3 in table 1. That is, for index 0 in table 5, the possible ways to allocate the numbers of spatial bins corresponding to TRP1 and TRP2 are: the numbers of the spatial domain substrates corresponding to the TRP1 and the TRP2 are respectively 4 and 4, so that the sum of the numbers of the spatial domain substrates corresponding to the TRP1 and the TRP2 is equal to 8. Other possible ways of allocating the corresponding space domain base numbers to TRP1 and TRP2 can be obtained by at least one of the index 1 to index 3 in table 5, and specific methods can refer to the index 0 in table 5, and will not be described herein.

Illustratively, the first index may be one of index 0 through index 3 in table 5. For example, when the first set of values is 3, the first index may be index 0; for another example, when the first set of values is 4, the first index may be index 1.

Tables 2-5 present possible ways in which the plurality of TRPs may be assigned to the respective numbers of spatial substrates, and it should be understood that the plurality of TRPs may not be in one-to-one correspondence with the respective numbers of spatial substrates. For example, in table 5, L1 and L2 may be indexes of numbers of spatial substrates corresponding to TRP1 and TRP2, respectively, and L1 and L2 may be indexes of numbers of spatial substrates corresponding to TRP2 and TRP1, respectively, and the exemplary descriptions of tables 2 to 4 are similar to table 5, and will not be repeated here.

Optionally, when the first set of values is determined according to the mode #c, the total number of possible values of the first index does not exceed a certain value X, and when the terminal device reports the number of spatial base corresponding to each of the plurality of TRPs participating in the cooperation to the network device, the terminal device may report the first index, where the required number of bits may beFor example, as shown in table 2, if the total number of possible values of the first index is 6, when the terminal device reports the number of spatial base corresponding to each TRP of the multiple TRPs participating in the cooperation to the network device, it is required that The number of bits of (2) is 3; for another example, as shown in table 3, if the total number of possible values of the first index is 5, when the terminal device reports the number of spatial domain substrates corresponding to each TRP in the plurality of TRPs participating in the cooperation to the network device, the number of bits required is 3; for another example, as shown in table 4, if the total number of possible values of the first index is 2, when the terminal device reports the number of spatial domain substrates corresponding to each TRP in the plurality of TRPs participating in the cooperation to the network device, the number of bits required is 1; for another example, as shown in table 5, if the total number of possible values of the first index is 4, when the terminal device reports the number of spatial base corresponding to each TRP in the plurality of TRPs participating in the cooperation to the network device, the number of bits required is 2.

Based on the mode #E, the terminal equipment enables the network equipment to determine the number of airspace substrates corresponding to each TRP in the plurality of TRPs participating in cooperation by sending a first index to the network equipment. According to the method, when the terminal equipment reports the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation to the network equipment, the first index associated with the first group of numerical values can be reported, and the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation can be not required to be reported to the network equipment independently, so that the reporting cost of the terminal equipment can be reduced.

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

The bit number of the bitmap is equal to the group number of at least one group of codebook parameters, and each group of codebook parameters in the at least one group of codebook parameters comprises the number of airspace substrates.

Illustratively, the at least one set of codebook parameters may be codebook parameters in an R18 cqt codebook, and as shown in table 1, the number of bits of the bitmap is equal to 10 if there are 10 sets of codebook parameters in the R18 cqt codebook.

For example, assuming that the second indication information indicates that there are two TRPs involved in the cooperation, which are respectively denoted as TRP1, TRP2, and the total number of spatial substrates corresponding to TRP1 and TRP2 is 8, the terminal device may determine, according to the index of the codebook parameters in the R18 cqt codebook (e.g. table 1), that the index corresponding to each value in the first set of values is index 2 and index 7, where index 2 may be the index of the number 2 of spatial substrates corresponding to TRP1, index 7 may be the index of the number 6 of spatial substrates corresponding to TRP2, and the bitmap may 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 set of values.

Based on the mode #F, the terminal equipment enables the network equipment to determine the number of airspace substrates corresponding to each TRP in the plurality of TRPs participating in cooperation by sending a bitmap to the network equipment. According to the method, when the terminal equipment reports the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation to the network equipment, the bitmap associated with the index corresponding to each of the first group of numerical values can be reported, and the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation can be not required to be reported to the network equipment independently, so that the reporting cost of the terminal equipment can be reduced.

In the mode #g, the second instruction information includes a combination number associated with an index corresponding to each of the first group of values.

Wherein the number of bits of the combined number is determined according to the number of groups of at least one group of codebook parameters and the number of the plurality of TRPs, and each group of codebook parameters in the at least one group of codebook parameters comprises the number of spatial domain bases.

The at least one set of codebook parameters may be codebook parameters in the R18 CJT codebook, assuming that the number of sets of at least one set of codebook parameters is K and the number of TRPs involved in cooperation is N, the number of bits of the combined number is

For example, assuming that the second indication information indicates that there are two TRPs involved in the cooperation, which are respectively marked as TRP1, TRP2, and the total number of spatial substrates corresponding to TRP1 and TRP2 is 8, the terminal device may determine, according to the index of the codebook parameters in the R18 cqt codebook (e.g. table 1), that the index corresponding to each value in the first set of values is index 2 and index 7, where index 2 may be the index of the number 2 of spatial substrates corresponding to TRP1, index 7 may be the index of the number 6 of spatial substrates corresponding to TRP2, and the number of bits of the combined number is equal to 6. For example, the number of combinations may be 000001. That is, the combination number is 000001, that is, the index corresponding to each value in the first group of values is index 2 and index 7.

Based on the mode #G, the terminal equipment enables the network equipment to determine the number of airspace substrates corresponding to each TRP in the plurality of TRPs participating in cooperation by sending the combination number to the network equipment. According to the method, when the terminal equipment reports the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation to the network equipment, the number of combinations associated with the indexes corresponding to each of the first group of numerical values can be reported, and the number of the airspace substrates corresponding to each of the plurality of TRPs participating in cooperation does not need to be reported to the network equipment independently, so that the reporting cost of the terminal equipment can be reduced.

Optionally, the first indication information is further used for indicating the number of frequency domain substrates corresponding to each of the plurality of TRPs, wherein the number of frequency domain substrates corresponding to each of the plurality of TRPs is the same.

Optionally, the first indication information is further used for indicating the proportion of all non-zero combination coefficients corresponding to the plurality of TRPs to all combination coefficients, the proportion of all non-zero combination coefficients to all combination coefficients is greater than or equal to a first threshold, and the first threshold is the sum of the proportion of non-zero combination coefficients corresponding to each TRP in the plurality of TRPs to the combination coefficients.

Illustratively, assume that the number of airspace substrates is L _s The TRP participating in the cooperation has N, N is a positive integer, and the proportion of all non-zero combination coefficients corresponding to the N TRPs to all combination coefficients is beta _s The ratio of the non-zero combination coefficient corresponding to each TRP in the N TRPs to the combination coefficient is beta _s1 、β _s2 、…、β _sN Beta is then _s And beta _s1 、β _s2 、…、β _sN Satisfies the formula (1):

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

optionally, the first indication information is further used for indicating an average proportion of non-zero combination coefficients corresponding to each TRP in the plurality of TRPs to the combination coefficients; and the terminal equipment determines the proportion of all the non-zero combination coefficients corresponding to the TRPs to all the combination coefficients according to the average proportion of the non-zero combination coefficients to the combination coefficients, wherein the proportion of all the non-zero combination coefficients to all the combination coefficients is greater than or equal to a first threshold value, and the first threshold value is the sum of the proportion of the non-zero combination coefficients corresponding to each TRP in the TRPs to the combination coefficients.

Illustratively, assume that the number of airspace substrates is L' _s The TRP participating in the cooperation has N, N is a positive integer, and the average proportion of the non-zero combination coefficient corresponding to each TRP in the N TRPs to the combination coefficient is beta' _s The terminal equipment occupies the average proportion beta 'of the combination coefficients according to the non-zero combination coefficients' _s Determining the proportion Nbeta 'of all non-zero combination coefficients corresponding to N TRPs to all combination coefficients' _s The ratio of the non-zero combination coefficient corresponding to each TRP in the N TRPs to the combination coefficient is beta' _s1 、β' _s2 、…、β' _sN Then Nbeta' _s And beta' _s1 、β' _s2 、…、β' _sN Satisfies the formula (2):

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

based on the method 200, after the terminal device sends the first set of values to the network device, codebook structure information, such as the airspace selection matrix W, may also be reported ₁ Corresponding indication information, frequency domain compression matrix W _f Corresponding indication information, combination coefficient W ₂ Non-zero combination coefficients, etc. In order to further reduce the complexity of the processing of the terminal device and the overhead of the reporting, 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 at the network device side.

The network device sending a first set of values to the terminal device may include: the network equipment determines a first group of values, wherein each value in the first group of values is the number of airspace substrates corresponding to each TRP in a plurality of TRPs participating in cooperation; the network device sends second indication information to the terminal device, wherein the second indication information is used for indicating the first group of values.

Wherein the network device determines a first set of values comprising: the network device determines a first 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 number of airspace substrates.

According to the method, the first group of values can be determined according to at least one group of codebook parameters (such as codebook parameters in an R18 CJT codebook), so that the possible mode that the network equipment freely selects the number of airspace substrates corresponding to each TRP in the TRPs participating in cooperation can be reduced, and the processing overhead of the network equipment is further controlled.

Based on the above technical solution, the network device may determine the first set of values and send the first set of values to the terminal device. By the method, the reserved cost of the network equipment can be prevented from being wasted, the terminal equipment can determine the number of airspace substrates corresponding to each TRP in the plurality of TRPs participating in cooperation according to the first group of values after acquiring the first group of values without sending the first group of values to the network equipment, so that codebook structure information such as airspace selection matrix W can be reported to the network equipment ₁ Corresponding indication information, frequency domain compression matrix W _f Corresponding indication information, combination coefficient W ₂ The parameters such as non-zero combination coefficient in the method and the system further reduce the processing complexity of terminal equipment and the reporting cost.

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

Based on the above technical solution, the network device may send the first index to the terminal device. By the method, the reservation cost of the network equipment can be ensured not to be wasted, and the terminal equipment can determine participation according to the first index after acquiring the first index without sending the first index to the network equipmentThe number of airspace substrates corresponding to each TRP in the coordinated multiple TRPs can report codebook structure information, such as airspace selection matrix W, to network equipment ₁ Corresponding indication information, frequency domain compression matrix W _f Corresponding indication information, combination coefficient W ₂ The parameters such as non-zero combination coefficient in the method and the system further reduce the processing complexity of terminal equipment and the reporting cost.

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

Based on the above technical solution, the network device may send the bitmap to the terminal device. By the method, the reserved cost of the network equipment can be prevented from being wasted, the terminal equipment can determine the number of airspace substrates corresponding to each TRP in the plurality of TRPs participating in cooperation according to the bitmap after acquiring the bitmap without sending the bitmap to the network equipment, so that codebook structure information such as airspace selection matrix W can be reported to the network equipment ₁ Corresponding indication information, frequency domain compression matrix W _f Corresponding indication information, combination coefficient W ₂ The parameters such as non-zero combination coefficient in the method and the system further reduce the processing complexity of terminal equipment and the reporting cost.

Optionally, the bit number of 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.

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

Based on the above technical solution, the network device may send the combination number to the terminal device. By the method, the reserved cost of the network equipment can be prevented from being wasted, the terminal equipment can determine the number of airspace substrates corresponding to each TRP in a plurality of TRPs participating in cooperation according to the combination number after acquiring the combination number without sending the combination number to the network equipment, so that codebook structure information such as airspace selection matrix W can be reported to the network equipment ₁ Corresponding indication information, frequency domain compression matrix W _f Corresponding indication information,Combination coefficient W ₂ The parameters such as non-zero combination coefficient in the method and the system further reduce the processing complexity of terminal equipment and the reporting cost.

Optionally, the number of bits of the combined number is determined according to the number of groups of at least one group of codebook parameters and the number of the plurality of TRPs, and each group of codebook parameters in the at least one group of codebook parameters includes the number of spatial bases.

The description of determining the first set of values at the network device side and transmitting the first set of values to the terminal device is similar to that at the terminal device side, and will not be described in detail here.

Based on the method 200, the terminal device may cause the network device to determine a number of spatial base corresponding to each of the plurality of TRPs involved in the cooperation by sending the first set of values to the network device. The method 300 illustrates that the terminal device may cause the network device to determine the number of spatial base pairs corresponding to each of the plurality of TRPs involved in the cooperation by transmitting the number of bits to the network device.

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

The terminal device receives fifth indication information from the network device, where the fifth indication information is used to indicate a total number P of spatial substrates and a total number L of spatial substrates corresponding to each of the plurality of TRPs participating in the cooperation.

Wherein P, L is a positive integer.

Wherein, the total number P of the spatial substrates may include the total number L of the spatial substrates corresponding to each of the plurality of TRPs participating in the cooperation.

It should be understood that the total number of spatial substrates corresponding to the plurality of TRPs involved in the cooperation is the total number of spatial substrates selected by the TRPs involved in the cooperation.

320, when the terminal equipment determines the number of spatial domain substrates corresponding to each of the plurality of TRPs participating in the cooperation, the number of bits of the number of bits used is

For example, assuming that three TRPs involved in the cooperation are respectively designated as TRP1, TRP2 and TRP3, the total number of spatial substrates is 12, and the total number of spatial substrates corresponding to the TRPs involved in the cooperation is 6, the number of bits used when the terminal device determines the number of spatial substrates corresponding to each of the TRPs involved in the cooperation is 7.

For example, the number of spatial substrates corresponding to each of the TRPs involved in the cooperation determined by the terminal device may be denoted by a combination number 110010011010, and "1" in each four-digit combination number from left to right is the number of spatial substrates corresponding to each of the TRPs involved in the cooperation. For example, "1" in "1100" indicates the number of spatial substrates corresponding to TRP1, "1" in "1001" indicates the number of spatial substrates corresponding to TRP2, and "1" in "1010" indicates the number of spatial substrates corresponding to TRP 3. The terminal device may represent the combination number 110010011010 using the number of bits 1000000 such that the number of bits 1000000 corresponds to the combination number 110010011010.

And 330, the terminal device sends the bit number to the network device.

For example, the terminal device may send the number of bits 1000000 to the network device, and after the network device receives the number of bits 1000000, the network device may determine the number of combinations 110010011010 corresponding to the number of bits 1000000, so as to determine the number of spatial base corresponding to each of the plurality of TRPs participating in the cooperation.

Based on the above technical solution, the terminal device may send the number of bits to the network device, where the number of bits corresponds to the number of combinations, so that after the network device receives the number of bits, the number of combinations may be determined according to the number of bits, and further determine the number of spatial base corresponding to each of the plurality of TRPs participating in the cooperation. According to the method, when the terminal equipment reports the number of the airspace substrates corresponding to each of the TRPs participating in the cooperation to the network equipment, the bit number can be reported, and the number of the airspace substrates corresponding to each of the TRPs participating in the cooperation can be not required to be reported to the network equipment independently, so that the reporting cost of the terminal equipment can be reduced.

Optionally, based on the methods 200 to 300, when the number of spatial base corresponding to each part of TRP is 0 in the plurality of TRP participating in the cooperation, the terminal device may not report the codebook structure information corresponding to each part of TRP, such as the spatial selection matrix W, to the network device ₁ Corresponding indication information, frequency domain compression matrix W _f Corresponding indication information, combination coefficient W ₂ Parameters such as non-zero combination coefficients in the terminal equipment, so that the reporting cost of the terminal equipment can be further reduced.

Based on the methods 200-300, the terminal device may determine, by sending a first set of values or bits to the network device, the number of spatial substrates corresponding to each of the plurality of TRPs participating in the cooperation, and the terminal device may not need to report, to the network device, the number of spatial substrates corresponding to each of the plurality of TRPs participating in the cooperation separately, so as to reduce reporting overhead of the terminal device. Based on the above, the terminal device may also determine, by sending the second set of values to the network device, a proportion of the non-zero combination coefficient corresponding to each of the plurality of TRPs participating in the cooperation to the combination coefficient by the network device, and the terminal device may not need to report, to the network device, the proportion of the non-zero combination coefficient corresponding to each of the plurality of TRPs participating in the cooperation to the combination coefficient separately, thereby also reducing reporting overhead of the terminal device.

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

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

For example, assuming that there are three TRPs involved in the cooperation, respectively denoted as TRP1, TRP2, TRP3, the terminal device may receive third indication information from the network device, where the third indication information is used to indicate the proportion of all non-zero combination coefficients corresponding to TRP1, TRP2, and TRP3 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 the plurality of TRPs participating in the cooperation to all the combination coefficients may further include: the terminal device may also receive third indication information from the network device, where the third indication information is used to indicate an average proportion of the non-zero combination coefficient corresponding to each TRP in the plurality of TRPs participating in the cooperation to the combination coefficient; and the terminal equipment determines the proportion of all the non-zero combination coefficients corresponding to the TRPs participating in cooperation to all the combination coefficients according to the average proportion of the non-zero combination coefficients to the combination coefficients.

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

It should be understood that the proportion of the non-zero combination coefficient corresponding to each TRP in the plurality of TRPs participating in the cooperation to the combination coefficient may be the same or different, which is not limited in the embodiment of the present application.

Wherein, the sum of the proportion of the non-zero combination coefficient corresponding to each TRP in the plurality of TRPs participating in cooperation to the combination coefficient is equal to the proportion of all non-zero combination coefficients to all combination coefficients.

Optionally, the terminal device determines a second set of values, including: and the terminal equipment determines a second group of values according to at least one group of codebook parameters, wherein each group of codebook parameters in the at least one group of codebook parameters comprises the proportion of non-zero combination coefficients to the combination coefficients.

It should be understood that the R18 cqt codebook may be obtained by enhancing an existing R17 FeTypeII PS codebook, or the existing R17 FeTypeII PS codebook may be directly used as the R18 cqt codebook, which is not limited in the embodiments of the present application.

It should be understood that, when the R17 FeTypeII PS codebook is enhanced to obtain the R18 CJT codebook, it is understood that, for TRPs with better channel states among TRPs participating in cooperation, the TRP of this type tends to have a greater influence on the cooperation performance, so that a larger proportion of non-zero combination coefficients to combination coefficients may be allocated to the TRP of this type. At this time, the R17 FeTypeII PS codebook may be enhanced to obtain an R18 cqt codebook, where at least one set of codebook parameters in the R18 cqt codebook may include a larger proportion of non-zero combining coefficients to combining coefficients.

The following examples illustrate enhancement of the existing R17FeTypeII PS codebook to obtain the R18 CJT codebook. The description of the existing R17FeTypeII PS codebook as the R18 CJT codebook is similar to the description of the enhancement of the existing R17FeTypeII PS codebook to obtain the R18 CJT codebook, and will not be repeated here.

Table 6 gives R18 cqt single-station codebook parameter combinations that can be obtained by adding a partial codebook parameter list to the codebook parameters in the R17FeTypeII PS codebook.

Table 6R 18 CJT single TRP codebook parameter combination list

Index	M	α	β
				1	1	1/4	1/2
2	1	1/2	1/2
				3	1	3/4	1/2
4	1	1	1/2
				5	1	1	3/4
6	1	1	1
				7	2	1/2	1/2
8	2	3/4	1/2
				9	2	1	1/2
10	2	1	3/4
				11	2	1/4	1/2
12	2	1	1/4

As shown in table 6, M is the number of frequency domain substrates; alpha is the port selection proportionality coefficient; beta is the ratio of the non-zero combination coefficients of a single TRP to the combination coefficients.

The index of at least one group of codebook parameters may be an index of codebook parameters in the R18 cqt codebook, as shown in table 6, where the number of groups of codebook parameters in the R18 cqt codebook is 12, and the 12 indexes corresponding to codebook parameters respectively, that is, index 1, index 2, index 3, index 4, index 5, index 6, index 7, index 8, index 9, index 10, index 11, and index 12, where index 1, index 2, index 11, and index 12 are four groups of codebook parameters added in the codebook parameters in the R17FeTypeII PS codebook.

For example, assuming that the third indication information indicates that three TRPs involved in the cooperation are respectively denoted as TRP1, TRP2, TRP3, where the proportion of all non-zero combination coefficients corresponding to TRP1, TRP2 and TRP3 to all combination coefficients is 9/4, the terminal device may determine that the second set of values may include index 4, index 5 and index 6 in table 6 according to the index of codebook parameters in the R18 cqt codebook, where index 4 may be an index of the proportion of non-zero combination coefficients corresponding to TRP1 to 1/2, index 5 may be an index of the proportion of non-zero combination coefficients corresponding to TRP2 to 3/4 of combination coefficients, and index 6 may be an index of the proportion of non-zero combination coefficients corresponding to TRP3 to 1/4 of combination coefficients, and the sum of the proportion of the non-zero combination coefficients corresponding to TRP1, TRP2 and TRP3 to combination coefficients is equal to 9/4.

And 430, the terminal equipment sends fourth indication information to the network equipment, wherein the fourth indication information is used for indicating the second group of numerical values.

Based on step 430, when the fourth indication information indicates the second set of values, there may be several ways as follows.

In mode #h, the fourth indication information includes a bitmap associated with an index corresponding to each value in the second set of values.

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

Illustratively, the at least one set of codebook parameters may be codebook parameters in an R18 cqt codebook, and as shown in table 6, the number of bits of the bitmap is equal to 12 if there are 12 sets of codebook parameters in the R18 cqt codebook. When the index corresponding to each value in the second set of values includes index 4, index 5, and index 6 in table 6, the bitmap may be 000000111000, where a right-to-left "1" indicates that the corresponding index in table 6 is the index corresponding to each value in the second set of values.

In the mode #i, the fourth instruction information includes a combination number associated with an index corresponding to each value in the second group of values.

Wherein the number of bits of the combined number is determined based on the number of groups of at least one group of codebook parameters and the number of the plurality of TRPs, each group of codebook parameters in the at least one group of codebook parameters including a proportion of non-zero combined coefficients to the combined coefficients.

Illustratively, assuming that the number of groups of at least one group of codebook parameters is K and the number of TRPs involved in cooperation is N, the number of bits of the combined number is

Illustratively, the at least one set of codebook parameters may be codebook parameters in the R18 cqt codebook. As shown in table 6, there are 12 sets of codebook parameters in the R18 cqt codebook, and when there are three TRPs involved in cooperation, the number of bits of the combined number is equal to 8. When the index corresponding to each value in the second set of values includes index 4, index 5, and index 6 in table 6, the combined number may be 00000001. That is, the combination number is 00000001, that is, the index indicating that each value in the second set of values corresponds to includes index 4, index 5, and index 6 in table 6.

Optionally, the third indication information is further used for indicating the number of frequency domain substrates corresponding to each of the plurality of TRPs, wherein the number of frequency domain substrates corresponding to each of the plurality of TRPs is the same.

Optionally, the third indication information is further used for indicating a port selection scaling factor corresponding to each of the plurality of TRPs participating in the cooperation, and the number of frequency domain substrates corresponding to each of the plurality of TRPs participating in the cooperation is the same.

Illustratively, the port selection scaling factor corresponding to each of the plurality of TRPs participating in the cooperation is α, and the frequency domain base number corresponding to each of the plurality of TRPs participating in the cooperation is M, where α=m.

Optionally, the third indication information is further used for indicating a fourth threshold value, where the fourth threshold value is a product of all non-zero combination coefficients corresponding to the plurality of TRPs participating in the cooperation and all combination coefficients, the port corresponding to the plurality of TRPs participating in the cooperation selects a product of the total ratio coefficients, the fourth threshold value is greater than or equal to a fifth threshold value, the fifth threshold value is a sum of products of all non-zero combination coefficients corresponding to each of the plurality of TRPs participating in the cooperation and all port corresponding to each of the TRPs participating in the cooperation.

Illustratively, assuming that there are N TRPs involved in the cooperation, N being a positive integer, the total proportion of all non-zero combining coefficients corresponding to the N TRPs to all combining coefficients is β _t The ratio of the non-zero combination coefficient corresponding to each TRP in the N TRPs to the combination coefficient is beta _t1 、β _t2 、…、β _tN The port selection total proportionality coefficient corresponding to the N TRPs is alpha _t The port selection ratio corresponding to each TRP of the N TRPsExample coefficient is alpha _t1 、α _t2 、…、α _tN Alpha is then _t 、β _t And beta _t1 、β _t2 、…、β _tN ，α _t1 、α _t2 、…、α _tN Satisfies the formula (3):

α _t β _t ≥α _t1 β _t1 +α _t2 β _t2 +L+α _tN β _tN (3)

optionally, the third indication information is further used for indicating an eighth threshold value, where the eighth threshold value is a product of an average proportion of a non-zero combination coefficient corresponding to each of the plurality of TRPs participating in the cooperation to a combination coefficient and an average port selection proportion coefficient corresponding to each of the plurality of TRPs participating in the cooperation; the terminal equipment determines a fourth threshold according to the eighth threshold, wherein the fourth threshold is the average proportion of the non-zero combination coefficient corresponding to each of the plurality of TRPs participating in cooperation to the combination coefficient, the average port selection proportion coefficient corresponding to each of the plurality of TRPs participating in cooperation, the product of the number of the plurality of TRPs participating in cooperation, and the fourth threshold is greater than or equal to a fifth threshold, and the fifth threshold is the sum of the products of the port selection proportion coefficients corresponding to each of the plurality of TRPs participating in cooperation, the proportion of the non-zero combination coefficient corresponding to each of the plurality of TRPs participating in cooperation to the combination coefficient.

Illustratively, assuming that there are N TRPs involved in cooperation, where N is a positive integer, each TRP of the N TRPs has an average ratio of its respective non-zero combination coefficient to the combination coefficient of β' _t The ratio of the non-zero combination coefficient corresponding to each TRP in the N TRPs to the combination coefficient is beta' _t1 、β' _t2 、…、β' _tN The average port selection scaling factor corresponding to each TRP of the N TRPs is alpha' _t Each TRP of the N TRPs has a port selection scaling factor of alpha' _t1 、α' _t2 、…、α' _tN Alpha 'then' _t 、β' _t And beta' _t1 、β' _t2 、…、β' _tN ，α' _t1 、α' _t2 、…、α' _tN Between which are locatedSatisfy formula (4):

Nα' _t β' _t ≥α' _t1 β' _t1 +α' _t2 β' _t2 +L+α' _tN β' _tN (4)

based on the method 400, the terminal device may also report codebook structure information, such as the port selection matrix W, after sending the second set of values to the network device ₁ Corresponding indication information, frequency domain compression matrix W _f Corresponding indication information, combination coefficient W ₂ Non-zero combination coefficients, etc. In order to further reduce the complexity of the processing of the terminal device and the overhead of the reporting, 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 at the network device side.

The network device sending a second set of values to the terminal device may include: the network equipment determines a second group of values, wherein each value in the second group of values is the proportion of a 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, wherein the fourth indication information is used for indicating the second group of values.

Wherein the network device determines a second set of values comprising: the network device determines a 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 proportion of non-zero combining coefficients to the combining coefficients.

By the method, the second set of values can be determined according to at least one set of codebook parameters (such as codebook parameters in an R18 CJT codebook), so that the possible mode that the network equipment freely selects the number of airspace substrates corresponding to each TRP in the plurality of TRPs participating in cooperation can be reduced, and the processing overhead of the network equipment is further controlled.

Based on the above technical solution, the network device may determine the second set of values and send the second set of values to the terminal device. By the method, the reserved expenditure of the network equipment can be ensured not to be wasted, the terminal equipment can determine each of the plurality of TRPs participating in cooperation according to the second group of values after acquiring the second group of values without sending the second group of values to the network equipmentThe non-zero combination coefficients corresponding to the TRPs occupy the proportion of the combination coefficients, so that codebook structure information, such as a port selection matrix W, can be reported to the network equipment ₁ Corresponding indication information, frequency domain compression matrix W _f Corresponding indication information, combination coefficient W ₂ The parameters such as non-zero combination coefficient in the method and the system further reduce the processing complexity of terminal equipment and the reporting cost.

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

Based on the above technical solution, the network device may send the bitmap to the terminal device. By the method, the reserved cost of the network equipment can be prevented from being wasted, the terminal equipment can determine the proportion of the non-zero combination coefficient corresponding to each TRP in the plurality of TRPs participating in cooperation to the combination coefficient after acquiring the bitmap without sending the bitmap to the network equipment, so that codebook structure information such as a port selection matrix W can be reported to the network equipment ₁ Corresponding indication information, frequency domain compression matrix W _f Corresponding indication information, combination coefficient W ₂ The parameters such as non-zero combination coefficient in the method and the system further reduce the processing complexity of terminal equipment and the reporting cost.

Optionally, the bit number of the bitmap is equal to the number of groups of at least one group of codebook parameters, each group of codebook parameters in the at least one group of codebook parameters comprising a proportion of non-zero combined coefficients to combined coefficients.

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

Based on the above technical solution, the network device may send the combination number to the terminal device. By the method, the reserved cost of the network equipment can be prevented from being wasted, the terminal equipment can determine the proportion of the non-zero combination coefficient corresponding to each TRP in the plurality of TRPs participating in cooperation to the combination coefficient after acquiring the combination number without sending the combination number to the network equipment, so that codebook structure information such as a port selection matrix W can be reported to the network equipment ₁ Corresponding indication information, frequency domain compression momentArray W _f Corresponding indication information, combination coefficient W ₂ The parameters such as non-zero combination coefficient in the method and the system further reduce the processing complexity of terminal equipment and the reporting cost.

Optionally, the number of bits of the combination number is determined according to the number of groups of at least one group of codebook parameters and the number of the plurality of TRPs, 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.

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

Based on the methods 200-400, the terminal device may determine the number of spatial substrates corresponding to each of the plurality of TRPs involved in the cooperation and the proportion of the non-zero combination coefficient corresponding to each of the plurality of TRPs involved in the cooperation to the combination coefficient, and may enable the network device to obtain the number of spatial substrates corresponding to each of the plurality of TRPs involved in the cooperation and the proportion of the non-zero combination coefficient corresponding to each of the plurality of TRPs involved in the cooperation to the combination coefficient by transmitting the first set of values, the second set of values, or the number of bits to the network device. Based on this, the method 500 shown in fig. 5 may be used for the network device to send, to the terminal device, the codebook parameter corresponding to each TRP of the plurality of TRPs, so that the terminal device may determine, according to the codebook parameter corresponding to each TRP of the plurality of TRPs, the codebook parameter corresponding to each TRP of the plurality of TRPs involved in cooperation, so as to reduce the complexity of processing by the terminal device, where the plurality of TRPs may include a plurality of TRPs involved in cooperation, and each codebook parameter corresponding to each TRP may include the number of spatial domain substrates, and may also include the proportion of the non-zero combination coefficient to the combination coefficient.

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

510, the network device determines a second index according to the indexes of the M groups of codebook parameters, where the second index is used to indicate a combination of indexes of codebook parameters corresponding to each TRP of the N TRPs.

Wherein M, N is a positive integer and N is less than or equal to M.

Each of the M groups of codebook parameters may include the number of spatial domain bases, and each of the M groups of codebook parameters may also include a proportion of non-zero combination coefficients to combination coefficients.

The network device determines the second index according to the index of the M groups of codebook parameters, and there may be the following two examples.

In one example, each of the M sets of codebook parameters may include a number of spatial bases, and the network device determines the second index based on the indices of the M sets of codebook parameters.

The M groups of codebook parameters may be codebook parameters in the R18 cqt codebook.

It should be further understood that, when the R16 eTypeII NP codebook is enhanced to obtain the R18 cqt codebook, it may be understood that, because the reporting overhead of the terminal device is related to the codebook parameter corresponding to each of the plurality of TRPs participating in the cooperation, in order to control the reporting overhead of the terminal device, a smaller number of airspace substrates may be allocated to a part of the plurality of TRPs participating in the cooperation. At this time, the R16 eTypeII NP codebook may be enhanced to obtain an R18 cqt codebook, where at least one set of codebook parameters in the R18 cqt codebook may include a smaller number of airspace bases.

Table 7 shows the R18 cqt single-station codebook parameter combinations that can be obtained by adding a partial codebook parameter list to the codebook parameters in the R16 eTypeII NP codebook, for example, adding the codebook parameter combinations corresponding to the smaller spatial base number l=1.

Table 7R 18 CJT single TRP codebook parameter combination list

For the description of the parameters L, v, β in table 7, reference is made to the description in table 1, and no further description is given here.

Table 7 gives 12 sets of codebook parameters, which can be respectively noted as index 1, index 2, index 3, index 4, index 5, index 6, index 7, index 8, index 9, index 10, index 11, index 12, wherein index 1-index 4 are four sets of codebook parameters added in the codebook parameters in the R16 eTypeII NP codebook.

As can be seen from table 7, the parameter M in step 810 is 12, and assuming that the parameter N in step 810 is 4, i.e. the number of TRPs is 4, and the four TRPs are respectively denoted as TRP1, TRP2, TRP3, TRP4, the possible ways in which TRP1, TRP2, TRP3, TRP4 are allocated to the corresponding codebook parameters can be shown in table 8.

TABLE 8 possible ways in which TRP1, TRP2, TRP3, TRP4 allocate the respective codebook parameters

Index	R1	R2	R3	R4
					1	1	2	3	4
2	7	6	5	1
					3	7	6	5	2
4	8	7	6	5
					5	8	7	6	4
6	7	6	4	2
					7	12	11	3	1
8	10	9	3	2

As shown in table 8, R1, R2, R3, R4 may be indexes of codebook parameters corresponding to TRP1, TRP2, TRP3, TRP4, respectively, which may correspond to the indexes in table 7. By the correspondence between the index of the codebook parameters and the index in table 7, possible ways of allocating the respective codebook parameters to TRP1, TRP2, TRP3, TRP4 can be obtained. For example, for index 1 in table 8, if the index of the codebook parameter corresponding to TRP1 is 1, the index of the codebook parameter corresponding to TRP1 corresponds to index 1 in table 7; the index of the codebook parameter corresponding to TRP2 is 2, and 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, and the index of the codebook parameter corresponding to TRP3 corresponds to index 3 in table 7; the index of the codebook parameter corresponding to TRP4 is 4, and the index of the codebook parameter corresponding to TRP4 corresponds to index 4 in table 7. Other possible ways of allocating the corresponding codebook parameters to TRP1, TRP2, TRP3, TRP4 may also be obtained by at least one of index 2 to index 8 in table 8, and specific methods may refer to index 1 in table 8, which will not be described herein.

Based on tables 7 and 8, the network device may determine a second index from the index of the 12 sets of codebook parameters in table 7, the second index being one of index 1 to index 8 in table 8.

For another example, each of the M sets of codebook parameters may include a proportion of non-zero combining coefficients to combining coefficients, and the network device determines the second index from the indices of the M sets of codebook parameters.

It should be further understood that, when the R17 FeTypeII PS codebook is enhanced to obtain the R18 cqt codebook, it may be understood that, because the reporting overhead of the terminal device is related to the codebook parameter corresponding to each of the TRPs participating in the cooperation, in order to control the reporting overhead of the terminal device, a proportion of the lower non-zero combination coefficient to the combination coefficient may be allocated to a part of the TRPs participating in the cooperation. At this time, the R17 FeTypeII PS codebook may be enhanced to obtain an R18 cqt codebook, where at least one set of codebook parameters in the R18 cqt codebook may include a lower proportion of non-zero combining coefficients to combining coefficients.

The following examples illustrate enhancement of the existing R17 FeTypeII PS codebook to obtain the R18 CJT codebook. The description of the existing R17 FeTypeII PS codebook as the R18 CJT codebook is similar to the description of the enhancement of the existing R17 FeTypeII PS codebook to obtain the R18 CJT codebook, and will not be repeated here.

Table 9 gives the R18 cqt single-station codebook parameter combinations that can be obtained by adding a partial codebook parameter list to the codebook parameters in the R17 FeTypeII PS codebook.

Table 9R 18 CJT single TRP codebook parameter combination list

Index	M	α	β
				1	1	1/4	1/8
2	1	1/4	1/4
				3	1	1/2	1/8
4	1	1/2	1/4
				5	1	3/4	1/2
6	1	1	1/2
				7	1	1	3/4
8	1	1	1
				9	2	1/4	1/8
10	2	1/4	1/4
				11	2	1/2	1/8
12	2	1/2	1/4
				13	2	1/2	1/2
14	2	3/4	1/2
				15	2	1	1/2
16	2	1	3/4

For the description of the parameters M, α, β in table 9, reference may be made to the description in table 6, and no further description is given here.

Table 9 gives 16 sets of codebook parameters, which can be respectively denoted as index 1 to index 16, where index 1 to index 4, index 9 to index 12 are eight sets of codebook parameters added among the codebook parameters in the R17 FeTypeII PS codebook.

As can be seen from table 9, the parameter M in step 810 is 16, and assuming that the parameter N in step 810 is 4, i.e. the number of TRPs is 4, and the four TRPs are respectively denoted as TRP1, TRP2, TRP3, TRP4, the possible ways in which TRP1, TRP2, TRP3, TRP4 are allocated to the corresponding codebook parameters can be shown in table 10.

TABLE 10 possible ways in which TRP1, TRP2, TRP3, TRP4 allocate the respective codebook parameters

Index	R1	R2	R3	R4
					1	1	2	3	4
2	6	5	4	3
					3	7	6	5	4
4	8	7	6	5
					5	16	11	10	9
6	15	14	10	9
					7	12	11	10	9
8	13	12	10	9

As shown in table 10, R1, R2, R3, R4 may be indexes of codebook parameters corresponding to TRP1, TRP2, TRP3, TRP4, respectively, which may correspond to the indexes in table 9. By the correspondence between the index of the codebook parameters and the index in table 9, possible ways of allocating the respective codebook parameters to TRP1, TRP2, TRP3, TRP4 can be obtained. For example, for index 1 in table 10, if the index of the codebook parameter corresponding to TRP1 is 1, the index of the codebook parameter corresponding to TRP1 corresponds to index 1 in table 9; the index of the codebook parameter corresponding to TRP2 is 2, and 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, and the index of the codebook parameter corresponding to TRP3 corresponds to index 3 in table 9; the index of the codebook parameter corresponding to TRP4 is 4, and the index of the codebook parameter corresponding to TRP4 corresponds to index 4 in table 9. Other possible ways of allocating the corresponding codebook parameters to TRP1, TRP2, TRP3, TRP4 may also be obtained by at least one of index 2 to index 8 in table 10, and specific methods may refer to index 1 in table 10, and will not be described herein.

Based on tables 9 and 10, the network device may determine a second index from the index of the 16 sets of codebook parameters in table 9, the second index being one of index 1 to index 8 in table 10.

It should be understood that both the above examples are exemplified by the number N of TRP being equal to 4, and it is understood that the number of TRP may be other values, for example, the number of TRP may be 2, and the number of TRP may be 3.

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

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

Illustratively, 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, the bit number 001 corresponding to index 1 in table 8 may be sent to the terminal device, and after receiving index 1 in table 8, the terminal device may obtain the codebook parameters corresponding to each of the 4 TRPs.

Alternatively, the second index may choose not to have a total number of indexes exceeding 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 choose does not exceed 8.

Based on step 520, after receiving the second index from the network device, the terminal device may determine, according to the second index, an index of a codebook parameter corresponding to each of Q TRPs involved in the cooperation, where N TRPs include Q TRPs involved in the cooperation, and the index of the codebook parameter corresponding to each of Q TRPs involved in the cooperation is an index of a first Q codebook parameters included in the second index, where N, Q is a positive integer.

Illustratively, the second index is one of index 1 to index 8 in table 8, where the second index includes an index of codebook parameters corresponding to each of four TRPs, and the index of codebook parameters corresponding to each of three TRPs participating in cooperation is an index of the first three codebook parameters included in the second index, assuming that the number of TRPs participating in cooperation is three. For example, assuming that four TRPs are designated as TRP1, TRP2, TRP3, TRP4, respectively, the index of the codebook parameter corresponding to each of the three TRPs participating in the cooperation may be the index of the codebook parameter corresponding to each of TRP1, TRP2, TRP 3.

It should be appreciated that tables 8 and 10 give possible ways of assigning respective codebook parameters to a plurality of TRPs, and it should be understood that there is not a one-to-one correspondence between the plurality of TRPs and the respective codebook parameters of the plurality of TRPs. For example, in table 8, R1, R2, R3, and R4 may be the index of the codebook parameters corresponding to TRP1, TRP2, TRP3, and TRP4, R1, R2, R3, and R4 may be the index of the codebook parameters corresponding to TRP2, TRP1, TRP3, and TRP4, R1, R2, R3, and R4 may be the index of the codebook parameters corresponding to TRP1, TRP2, TRP4, and TRP3, and R1, R2, R3, and R4 may be the index of the codebook parameters corresponding to other combinations of TRP1, TRP2, TRP3, and TRP4, respectively, and the exemplary description of table 10 is similar to table 8, and will not be repeated here.

It will be appreciated that the examples in fig. 2-5 in the embodiments of the present application are merely for convenience of understanding the embodiments of the present application by those skilled in the art, and are not intended to limit the embodiments of the present application to the specific scenarios illustrated. It will be apparent to those skilled in the art from the examples of fig. 2-5 that various equivalent modifications or variations may be made, and such modifications or variations are intended to be within the scope of the embodiments of the present application. For example, "the number of spatial substrates corresponding to each of the plurality of TRPs involved in cooperation" in fig. 2 may be replaced with "the number of spatial substrates corresponding to each of the plurality of TRPs involved in cooperation".

It will also be appreciated that some optional features of the various embodiments of the application may, in some circumstances, be independent of other features, or may, in some circumstances, be combined with other features, without limitation.

It is also to be understood that the aspects of the embodiments of the present application may be used in any reasonable combination, and that the explanation or illustration of the terms presented in the embodiments may be referred to or explained in the various embodiments without limitation.

It should be further understood that the magnitude of the various numerical numbers in the embodiments of the present application do not imply any order of execution, but are merely convenient to distinguish between the embodiments, and should not be construed as limiting the implementation of the embodiments of the present application.

It is also understood that in this application, "at least one" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

It should be further understood that, in the embodiments of the present application, some information names, such as the first indication information, the second indication information, etc., are referred to, and the naming thereof should not limit the protection scope of the embodiments of the present application.

It should also be understood that in the foregoing embodiments of the method and operations implemented by the terminal device or the network device, the method and operations may also be implemented by component parts (e.g., chips or circuits) of the terminal device or the network device.

Corresponding to the methods given by the above method embodiments, the embodiments of the present application also provide corresponding apparatuses, where the apparatuses include corresponding modules for performing the above method embodiments. The module may be software, hardware, or a combination of software and hardware. It will be appreciated that the technical features described in the method embodiments described above are equally applicable to the device embodiments described below.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is described from the perspective of the network device, the terminal device, and the interaction between the network device and the terminal device, respectively. In order to implement the functions in the methods provided in the embodiments of the present application, the network device and the terminal device may include hardware structures and/or software modules, and implement the functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Some of the functions described above are performed in a hardware configuration, a software module, or a combination of hardware and software modules, depending on the specific application of the solution and design constraints.

The communication method provided in the embodiment of the present application is described in detail above with reference to fig. 2 to 5. The following describes in detail the communication device provided in the embodiment of the present application with reference to fig. 6 to 8.

Fig. 6 is a schematic block diagram of a communication device provided in an embodiment of the present application. The apparatus 600 comprises a processing unit 620 and a transceiver unit 610, the processing unit 620 being operable to implement respective processing functions, such as determining a first set of values, and the transceiver unit 610 being operable to implement respective communication functions. The transceiver unit 610 may also be referred to as a communication interface or a communication unit.

Optionally, the apparatus 600 further includes a storage unit, where the storage unit may be configured to store instructions and/or data, and the processing unit 620 may read the instructions and/or data in the storage unit, so that the apparatus implements the actions of the terminal device or the network device in the foregoing method embodiments.

The apparatus 600 may be configured to perform the actions performed by the terminal device or the network device in the above method embodiments, where the apparatus 600 may be a terminal device or a component of a terminal device, or may be a component of a network device or a component of a network device, the transceiver unit 610 is configured to perform operations related to transceiver of the terminal device or the network device in the above method embodiments, and the processing unit 620 is configured to perform operations related to processing of the terminal device or the network device in the above method embodiments.

As a design, the apparatus 600 is configured to perform the actions performed by the terminal device in the above method embodiments.

A possible implementation manner, the transceiver unit 610 is configured to receive first indication information from a network device, where the first indication information is used to indicate a total number of spatial domain substrates corresponding to each of a plurality of transmission and reception points TRP participating in cooperation; a processing unit 620, configured to determine a first set of values, where each value in the first set of values is a number of spatial substrates corresponding to each TRP in the plurality of TRPs, and a sum of each value in the first set of values is equal to a total number of spatial substrates; the transceiver unit 610 is configured to send second indication information to the network device, where the second indication information is used to indicate the first set of values.

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

In another possible implementation manner, the transceiver unit 610 is configured to receive 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 of the N transmission-reception points TRP; a processing unit 620, configured to determine, according to the second index, an index of a codebook parameter corresponding to each of Q TRPs involved in cooperation, where the N TRPs include Q TRPs, and the index of the codebook parameter corresponding to each of the Q TRPs is an index of a first Q codebook parameters included in the second index, and N, Q is a positive integer.

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

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

In another possible implementation manner, the transceiver unit 610 is configured to receive fifth indication information from the network device, where the fifth indication information is used to indicate a total number P of spatial substrates and a total number L of spatial substrates corresponding to each of the plurality of transmission receiving points TRP participating in the cooperation, and P, L is a positive integer; a processing unit for determining the number of spatial base corresponding to each TRP in the plurality of TRPs, wherein the number of bits is And the receiving and transmitting unit is used for transmitting the bit number to the network equipment.

The apparatus 600 may implement steps or processes corresponding to those performed by the terminal device in the method embodiment according to the embodiment of the present application, and the apparatus 600 may include a unit for performing the method performed by the terminal device in the embodiment shown in any of fig. 2 to 5.

As another design, the apparatus 600 is configured to perform the actions performed by the network device in the method embodiments above.

A possible implementation manner, the processing unit 620 is configured to determine a first set of values, where each value in the first set of values is a number of spatial domain substrates corresponding to each TRP in the multiple transmission and reception points TRP participating in the cooperation; the transceiver unit 610 is configured to send second indication information to the terminal device, where the second indication information is used to indicate the first set of values.

In another possible implementation manner, the processing unit 620 is configured to determine, according to the indexes of the M groups of codebook parameters, a second index, where the second index is used to indicate a combination of indexes of codebook parameters corresponding to each TRP of the N transmission and reception points TRP, where M, N is a positive integer, and N is less than or equal to M; and the receiving and transmitting unit is used for transmitting the second index to the terminal equipment.

Optionally, the N TRPs include Q TRPs involved in the cooperation, the index of the codebook parameters corresponding to each TRP of the Q TRPs involved in the cooperation is an index of the first Q codebook parameters included in the second index, and Q is a positive integer.

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

The apparatus 600 may implement steps or flows corresponding to those performed by the network device in the method embodiment according to the embodiment of the present application, and the apparatus 600 may include a unit for performing the method performed by the network device in the embodiment shown in any of fig. 2 to 5.

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

It should also be appreciated that the apparatus 600 herein is embodied in the form of functional units. The term "unit" herein may refer to an application specific integrated circuit (application specific integrated circuit, ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor, etc.) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an alternative example, it will be understood by those skilled in the art that the apparatus 600 may be specifically a terminal device or a network device in the foregoing embodiments, and may be used to perform each flow and/or step corresponding to the terminal device or the network device in the foregoing method embodiments, which are not repeated herein.

The apparatus 600 of each of the above embodiments has a function of implementing the corresponding steps performed by the terminal device or the network device in the above method. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions; for example, the transceiver unit may be replaced by a transceiver (e.g., a transmitting unit in the transceiver unit may be replaced by a transmitter, a receiving unit in the transceiver unit may be replaced by a receiver), and other units, such as a processing unit, etc., may be replaced by a processor, to perform the transceiver operations and related processing operations in the various method embodiments, respectively.

The transceiver unit 610 may be a transceiver circuit (e.g., may include a receiving circuit and a transmitting circuit), and the processing unit may be a processing circuit.

It should be noted that the apparatus in fig. 6 may be the device in the foregoing embodiment, or may be a chip or a chip system, for example: system on chip (SoC). The receiving and transmitting unit can be an input and output circuit and a communication interface; the processing unit is an integrated processor or microprocessor or integrated circuit on the chip. And are not limited herein.

As shown in fig. 7, another communication device 700 is provided in an embodiment of the present application. The apparatus 700 comprises a processor 710, the processor 710 being coupled to a memory 720, the memory 720 being for storing computer programs or instructions and/or data, the processor 710 being for executing the computer programs or instructions stored by the memory 720 or for reading the data stored by the memory 720 for performing the methods in the method embodiments above.

Optionally, the processor 710 is one or more.

Optionally, memory 720 is one or more.

Alternatively, the memory 720 may be integrated with the processor 710 or provided separately.

Optionally, as shown in fig. 7, the apparatus 700 further comprises a transceiver 730, the transceiver 730 being used for receiving and/or transmitting signals. For example, the processor 710 is configured to control the transceiver 730 to receive and/or transmit signals.

As an aspect, the apparatus 700 is configured to implement the operations performed by the terminal device or the network device in the above method embodiments.

For example, the processor 710 is configured to execute computer programs or instructions stored in the memory 720 to implement the relevant operations of the terminal device in the above respective method embodiments. For example, the method performed by the terminal device in any of the embodiments shown in fig. 2 to 5.

It should be appreciated that the processors referred to in the embodiments of the present application may be central processing units (central processing unit, CPU), but may also be other general purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), off-the-shelf programmable gate arrays (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memories mentioned in the embodiments of the present application may be volatile memories and/or nonvolatile memories. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM). For example, RAM may be used as an external cache. By way of example, and not limitation, RAM includes the following forms: static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and direct memory bus 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, discrete hardware components, the memory (storage module) may be integrated into the processor.

It should also be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Referring to fig. 8, an embodiment of the present application provides a chip system 800. The system-on-chip 800 (or may also be referred to as a processing system) includes logic 810 and an input/output interface 820.

Logic 810 may be, among other things, processing circuitry in system on chip 800. Logic 810 may be coupled to a memory unit to invoke instructions in the memory unit so that system-on-chip 800 may implement the methods and functions of embodiments of the present application. The input/output interface 820 may be an input/output circuit in the chip system 800, and 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 an aspect, the chip system 800 is configured to implement the operations performed by the terminal device or the network device in the above respective method embodiments.

For example, the logic 810 is configured 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 one of the embodiments shown in fig. 2 to 5; the input/output interface 820 is used to implement the transmission and/or reception related operations performed by the terminal device in the above method embodiments, such as those in the embodiments shown in any of fig. 2 to 5.

The embodiments of the present application also provide a computer readable storage medium, on which computer instructions for implementing the method performed by the terminal device or the network device in the above method embodiments are stored.

For example, the computer program, when executed by a computer, enables the computer to implement the methods performed by the terminal device in the above-described method embodiments.

The embodiments of the present application also provide a computer program product, which contains instructions that, when executed by a computer, implement the method performed by the terminal device or the network device in the above method embodiments.

The explanation and beneficial effects of the related content in any of the above-mentioned devices can refer to the corresponding method embodiments provided above, and are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Furthermore, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, 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 loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. For example, the computer may be a personal computer, a server, or a network device, etc. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). 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 an integration of one or more available media. For example, the aforementioned usable media include, but are not limited to, U disk, removable hard disk, read-only memory (ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other various media that can store program code.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

the method comprises the steps that a terminal device receives first indication information from a network device, wherein the first indication information is used for indicating the total number of spatial domain substrates corresponding to a plurality of transmission and reception points TRPs participating in cooperation;

the terminal equipment determines a first group of values, wherein each value in the first group of values is the number of airspace substrates corresponding to each TRP in the plurality of TRPs, and the sum of each value in the first group of values is equal to the total number of airspace substrates;

the terminal device sends second indication information to the network device, wherein the second indication information is used for indicating the first group of values.

2. The method of claim 1, wherein the terminal device determining the first set of values comprises:

And the terminal equipment determines the first group of values according to at least one group of codebook parameters, wherein each group of codebook parameters in the at least one group of codebook parameters comprises the number of airspace substrates.

3. The method of claim 1 or 2, wherein the second indication information comprises a first index, the first index being associated with the first set of values.

4. The method of claim 1 or 2, wherein the second indication information comprises a bitmap associated with an index corresponding to each value in the first set of values.

5. The method of claim 4, wherein the bit number of the bitmap is equal to the number of groups of at least one set of codebook parameters, each set of codebook parameters in the at least one set of codebook parameters comprising a spatial domain base number.

6. The method of claim 1 or 2, wherein the second indication information comprises a combined number associated with an index corresponding to each value in the first set of values.

7. The method of claim 6 wherein the number of bits of the combined number is determined based on a number of groups of at least one set of codebook parameters and a number of the plurality of TRPs, each of the at least one set of codebook parameters comprising a number of spatial bins.

8. The method according to any one of claims 1 to 7, wherein the first indication information is further used to indicate a number of frequency domain substrates corresponding to each of the plurality of TRPs, wherein the number of frequency domain substrates corresponding to each of the plurality of TRPs is the same.

9. A method of communication, comprising:

the terminal equipment receives a second index from the network equipment, wherein the second index is used for indicating the combination of indexes of codebook parameters corresponding to each TRP in N Transmission and Reception Points (TRPs);

the terminal equipment determines the index of the codebook parameters corresponding to each of Q TRPs participating in cooperation according to the second index, wherein the N TRPs comprise the Q TRPs, and the index of the codebook parameters corresponding to each of the Q TRPs is the index of the first Q codebook parameters included in the second index, and N, Q is a positive integer.

10. A method of communication, comprising:

the network equipment determines a first group of values, wherein each value in the first group of values is the number of airspace substrates corresponding to each TRP in a plurality of Transmission and Reception Points (TRPs) participating in cooperation;

the network device sends second indication information to the terminal device, wherein the second indication information is used for indicating the first group of values.

11. The method of claim 10, wherein the network device determining the first set of values comprises:

the network device determines the first set of values according to at least one set of codebook parameters, each set of codebook parameters in the at least one set of codebook parameters including a number of airspace substrates.

12. The method of claim 10 or 11, wherein the second indication information comprises a first index, the first index being associated with the first set of values.

13. The method of claim 10 or 11, wherein the second indication information comprises a bitmap associated with an index corresponding to each value in the first set of values.

14. The method of claim 13, wherein the bit number of the bitmap is equal to the number of groups of at least one set of codebook parameters, each set of codebook parameters in the at least one set of codebook parameters comprising a spatial domain base number.

15. The method of claim 10 or 11, wherein the second indication information comprises a combined number associated with an index corresponding to each value in the first set of values.

16. The method of claim 15 wherein the number of bits of the combined number is determined based on a number of groups of at least one set of codebook parameters and a number of the plurality of TRPs, each set of codebook parameters in the at least one set of codebook parameters including a number of spatial bins.

17. A method of communication, comprising:

the network equipment determines a second index according to indexes of M groups of codebook parameters, wherein the second index is used for indicating the combination of indexes of codebook parameters corresponding to each TRP in N transmission and reception points TRP, M, N is a positive integer, and N is smaller than or equal to M;

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

18. The method of claim 17, wherein the step of determining the position of the probe is performed,

the N TRPs comprise Q TRPs participating in cooperation, the index of codebook parameters corresponding to each TRP in the Q TRPs participating in cooperation is the index of the first Q codebook parameters included in the second index, and Q is a positive integer.

19. A communication device, comprising:

a processor for executing a computer program stored in a memory to cause the apparatus to perform the method of any one of claims 1 to 8, or to cause the apparatus to perform the method of claim 9, or to cause the apparatus to perform the method of any one of claims 10 to 16, or to cause the apparatus to perform the method of claim 17 or 18.

20. The apparatus of claim 19, further comprising the memory.

21. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when run on a computer, causes the apparatus to perform the method of any one of claims 1 to 8, or causes the apparatus to perform the method of claim 9, or causes the apparatus to perform the method of any one of claims 10 to 16, or causes the apparatus to perform the method of claim 17 or 18.

22. A computer program product comprising instructions for performing the method of any one of claims 1 to 8, or for performing the method of claim 9, or for performing the method of any one of claims 10 to 16, or for performing the method of claim 17 or 18.