CN117651343A

CN117651343A - Method and device for reporting frequency domain components

Info

Publication number: CN117651343A
Application number: CN202210970004.7A
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: 2022-08-12
Filing date: 2022-08-12
Publication date: 2024-03-05
Also published as: WO2024032241A1

Abstract

The embodiment of the application provides a method and a device for reporting frequency domain components, which are used for reducing feedback overhead of an air interface. The method comprises the following steps: the terminal equipment acquires the number of Transmission and Reception Points (TRPs), first information and second information, wherein the number of TRPs is used for indicating the number of cooperative TRPs, the first information is used for indicating the number of frequency domain components, and the second information is used for indicating the number of candidate frequency domain components. The terminal equipment generates third information for indicating the frequency domain component selected by the terminal equipment, wherein the third information occupies log ₂ (X ^K )]A number of bits, wherein X is used to indicate a frequency domain component combination number, which is obtained according to the first information and the second information; k is used to indicate the number of TRPs. The terminal device sends third information to the network device.

Description

Method and device for reporting frequency domain components

Technical Field

The present disclosure relates to the field of wireless communications technologies, and in particular, to a method and apparatus for reporting a frequency domain component.

Background

The fifth generation (5th generation,5G) of communication systems has higher demands on system capacity, spectral efficiency, etc. In a 5G communication system, massive multiple-input multiple-output (multiple input multiple output, MIMO) technology plays a vital role in the spectral efficiency of the system. When the network equipment adopts the MIMO technology to send data to the terminal equipment, the specific precoding codebook is used for precoding downlink data. For this purpose, the network device needs to determine a specific precoding codebook according to the channel state information (channel state information, CSI) of the downlink channel reported by the terminal device.

In a communication scenario of multiple transmission reception points (transmission and reception point, TRP), a plurality of TRPs form a TRP cooperation set, the plurality of TRPs in the cooperation set cooperating as terminal devices transmitting data. For this, the network device needs to acquire CSI of a downlink channel between the terminal device and each TRP in the TRP cooperation set. When MIMO technology is used for communication between a terminal device and multiple TRPs, CSI reported by the terminal device needs to include indication information of frequency domain components selected by the terminal device for each TRP, so that the network device can determine a precoding codebook (i.e., a precoding matrix) used by each TRP to transmit downlink data. In the related art, a terminal device reports indication information of frequency domain components selected by the terminal device for each TRP. How to report the indication information of the frequency domain components corresponding to the TRPs more effectively by the terminal equipment, and reduce the air interface overhead is a technical problem to be solved.

Disclosure of Invention

The application provides a method and a device for reporting frequency domain components, which are used for reducing feedback overhead of an air interface.

The present application is described below in terms of various aspects, as will be readily appreciated, the following aspects may be implemented with reference to each other.

In a first aspect, the present application provides a method for reporting a frequency domain component, including: the terminal equipment acquires the number of TRPs, first information and second information, wherein the number of TRPs is used for indicating the number of cooperative TRPs, the first information is used for indicating the number of frequency domain components, and the second information is used for indicating the number of candidate frequency domain components; the terminal equipment generates third information, wherein the third information is used for indicating the frequency domain components selected by the terminal equipment, and the third information occupiesA number of bits, wherein X is used to indicateThe frequency domain component combination number is obtained according to the first information and the second information, and X is an integer greater than or equal to 1; k is used to indicate the TRP number, K is an integer greater than 1; the terminal device sends the third information to the network device.

Therefore, the method provided by the embodiment of the application effectively reduces the overhead of the air interface, so that the terminal equipment can report the frequency domain component in the TRP cooperation scene more effectively.

In an alternative manner, the terminal device acquires the number of TRPs, including: the terminal device receives fourth information from the network device, where the fourth information is used to indicate K reference signal resources or K antenna port groups, where the K reference signal resources or the K antenna port groups are in one-to-one correspondence with the K cooperative TRPs.

Thus, the terminal device can directly acquire the number of cooperative TRPs from the network device, enabling the terminal device to select the frequency domain component.

In an alternative manner, the terminal device acquires the number of TRPs, including: the terminal equipment receives fifth information from the network equipment, wherein the fifth information is used for indicating K 'reference signal resources or K' antenna port groups, K 'is an integer greater than 1, and the K' reference signal resources or the K 'antenna port groups are in one-to-one correspondence with K' TRPs; the terminal device determines K cooperative TRPs according to K 'TRPs, wherein K is less than or equal to K'.

Thus, the terminal device can determine the number of cooperative TRPs from the number of candidate cooperative TRPs acquired by the network device, enabling the terminal device to select the frequency domain component.

In an alternative manner, the terminal acquires the first information and the second information, including: the terminal device receives the first information and the second information from the network device.

Therefore, the terminal equipment can directly acquire the indication information of the number of the selected frequency domain components and the number of the candidate frequency domain components from the network equipment, so that the terminal equipment can select the frequency domain components.

In an alternative way, the first and second modules,or->Wherein the first information is used for indicating N, and the second information is used for indicating M.

In an alternative, n=4, m=2.

In an alternative, where N3. Ltoreq.19,alternatively, in the case of N3 > 19,wherein the first information is used for indicating M, and the second information is used for indicating N3.

In an optional manner, the third information is included in precoding matrix indicator PMI information, where the PMI information is carried in uplink control information UCI.

In an alternative way, at least one of the first information, the second information, the fourth information and the fifth information carries at least one of the following signaling: radio resource management, RRC, signaling, medium access control, control element, MAC-CE, signaling and downlink control information, DCI.

In a second aspect, the present application provides a method for reporting a frequency domain component, including: the network equipment receives third information from the terminal equipment, wherein the third information is used for indicating the frequency domain components selected by the terminal equipment, and the third information occupiesA number of bits, wherein X is an integer greater than or equal to 1, for indicating a frequency domain component combination number; k is used for indicating the number of cooperative TRPs, and K is an integer greater than 1; the network device determines frequency domain components for use in cooperative transmission based on the third information.

Therefore, the method provided by the embodiment of the application effectively reduces the overhead of the air interface, so that the network equipment can more effectively acquire the frequency domain component selected by the terminal equipment in the TRP cooperation scene, and the frequency domain component used for cooperation transmission is determined.

In an alternative, the method further comprises: the network device sends fourth information to the terminal device, where the fourth information is used to indicate K reference signal resources or K antenna port groups, where the K reference signal resources or the K antenna port groups are in one-to-one correspondence with the K cooperative TRPs.

Thus, the network device can directly inform the terminal device of the number of cooperative TRPs, enabling the terminal device to select the frequency domain component.

In an alternative, the method further comprises: the network equipment sends fifth information to the terminal equipment, wherein the fifth information is used for indicating K 'reference signal resources or K' antenna port groups, K 'is an integer greater than 1, and the K' reference signal resources or the K 'antenna port groups are in one-to-one correspondence with K' TRPs; the K 'TRPs are used to determine K of the collaborative TRPs, where K.ltoreq.K'.

Thus, the network device can directly inform the terminal device of the number of candidate cooperative TRPs, enabling the terminal device to determine the number of cooperative TRPs.

In an alternative, the method further comprises: the network device sends first information and second information to the terminal device, wherein the first information is used for indicating the number of frequency domain components, the second information is used for indicating the number of candidate frequency domain components, and the number of frequency domain component combinations is obtained according to the first information and the second information.

Therefore, the network equipment can directly inform the indication information of the frequency domain component number required to be selected by the terminal equipment and the candidate frequency domain component number, so that the terminal equipment can select the frequency domain component.

In an alternative, n=4, m=2.

In a third aspect, the present application provides a method for reporting spatial components, including: the terminal equipment acquires the number of TRPs, sixth information and seventh information, wherein the number of TRPs is used for indicating the number of cooperative TRPs, the sixth information is used for indicating the number of spatial components, and the seventh information is used for indicating the number of candidate spatial components; the terminal equipment generates eighth information, the eighth information is used for indicating the airspace component selected by the terminal equipment, and the eighth information occupiesA bit, wherein Y is used to indicate a spatial component combination number, the spatial component combination number is obtained according to the sixth information and the seventh information, and Y is an integer greater than or equal to 1; k is used to indicate the TRP number, K is an integer greater than 1; the terminal device sends the eighth information to the network device.

Therefore, the method provided by the embodiment of the application effectively reduces the air interface overhead, so that the terminal equipment can report the space domain component in the TRP cooperation scene more effectively.

Thus, the terminal device can directly acquire the number of cooperative TRPs from the network device, so that the terminal device can select the spatial component.

Thus, the terminal device can determine the number of cooperative TRPs from the number of candidate cooperative TRPs acquired by the network device, and enable the terminal device to select the spatial component.

In an alternative manner, the terminal obtains the sixth information and the seventh information, including: the terminal device receives the sixth information and the seventh information from the network device.

Therefore, the terminal equipment can directly acquire the indication information of the selected airspace component number and the candidate airspace component number from the network equipment, so that the terminal equipment can select airspace components.

In an optional manner, the eighth information is included in precoding matrix indicator PMI information, where the PMI information is carried in uplink control information UCI.

In an alternative way, at least one of the sixth information, the seventh information, the fourth information and the fifth information carries at least one of the following signaling: radio resource management, RRC, signaling, medium access control, control element, MAC-CE, signaling and downlink control information, DCI.

In a fourth aspect, the present application provides a method for reporting spatial components, including: the network device receives the eighth signal from the terminal deviceInformation indicating the spatial component selected by the terminal equipment, the eighth information occupyingA number of bits, wherein Y is used to indicate the number of spatial component combinations, Y is an integer greater than or equal to 1; k is used for indicating the number of cooperative TRPs, and K is an integer greater than 1; the network device determines spatial components used for cooperative transmission based on the eighth information.

Therefore, the method provided by the embodiment of the application effectively reduces the air interface overhead, so that the network equipment can more effectively acquire the airspace component selected by the terminal equipment in the TRP cooperation scene, and the airspace component used for cooperation transmission is determined.

Thus, the network device can directly inform the terminal device of the number of cooperative TRPs, so that the terminal device can select the spatial component.

In an alternative, the method further comprises: the network device sends sixth information and seventh information to the terminal device, wherein the sixth information is used for indicating the number of spatial components, the seventh information is used for indicating the number of candidate spatial components, and the number of spatial component combinations is obtained according to the sixth information and the seventh information.

Therefore, the network equipment can directly inform the terminal equipment of indicating information of the number of the spatial components required to be selected and the number of the candidate spatial components, and enables the terminal equipment to select the spatial components.

In a fifth aspect, the present application provides a method for reporting a frequency domain component and a spatial domain component, including: the terminal equipment acquires the number of TRPs, first information, second information, sixth information and seventh information, wherein the number of TRPs is used for indicating the number of cooperative TRPs, the first information is used for indicating the number of frequency domain components, the second information is used for indicating the number of candidate frequency domain components, the sixth information is used for indicating the number of spatial domain components, and the seventh information is used for indicating the number of candidate spatial domain components; the terminal equipment generates third information, which is used for indicating the frequency domain component and the space domain component selected by the terminal equipment, and occupiesThe individual bits indicate the frequency domain component and +.>The number of bits indicates a spatial component, wherein X is used for indicating a frequency domain component combination number, the frequency domain component combination number is obtained according to the first information and the second information, and X is an integer greater than or equal to 1; y is used for indicating the number of spatial component combinations, the number of spatial component combinations is obtained according to the sixth information and the seventh information, and Y is an integer greater than or equal to 1; k is used to indicate the TRP number, K is an integer greater than 1; the terminal device sends the third information to the network device.

Therefore, the method provided by the embodiment of the application effectively reduces the air interface overhead, so that the terminal equipment can report the frequency domain component and the space domain component in the TRP cooperation scene more effectively.

In an alternative, n=4, m=2.

In an alternative way, at least one of the first information, the second information, the fourth information, the fifth information, the sixth information and the seventh information carries at least one of the following signaling: radio resource management, RRC, signaling, medium access control, control element, MAC-CE, signaling and downlink control information, DCI.

In a sixth aspect, the present application provides a method for reporting a frequency domain component and a spatial domain component, including: the network equipment receives third information from the terminal equipment, wherein the third information is used for indicating the frequency domain component and the space domain component selected by the terminal equipment, and the third information occupiesThe individual bits indicate the frequency domain component and +.>The bits indicate spatial components, where X is used to indicate frequency domain componentsThe number of the combination of the quantity, X is an integer greater than or equal to 1; y is used for indicating the number of spatial component combinations, the number of spatial component combinations is obtained according to the sixth information and the seventh information, and Y is an integer greater than or equal to 1; k is used for indicating the number of cooperative TRPs, and K is an integer greater than 1; the network device determines frequency domain components for use in cooperative transmission based on the third information.

Therefore, the method provided by the embodiment of the application effectively reduces the air interface overhead, so that the network equipment can more effectively acquire the frequency domain component and the space domain component selected by the terminal equipment in the TRP cooperation scene, and the frequency domain component and the space domain component used for cooperation transmission are determined.

In an alternative, n=4, m=2.

A seventh aspect provides a terminal device for performing the method of the first aspect or any of the possible implementations of the third aspect or any of the possible implementations of the fifth aspect or any of the fifth aspect, in particular the terminal device may comprise means for performing the method of the first aspect or any of the possible implementations of the third aspect or any of the possible implementations of the fifth aspect.

In an eighth aspect, a network device is provided for performing the second aspect or any of the possible implementations of the fourth aspect or any of the possible implementations of the sixth aspect, in particular the network device may comprise means for performing the second aspect or any of the possible implementations of the fourth aspect or any of the possible implementations of the sixth aspect.

A ninth aspect provides a terminal device comprising: a processor, a transceiver, and a memory. Wherein the memory is configured to store computer-executable instructions that, when the terminal device is operating, the processor executes the computer-executable instructions stored by the memory to cause the terminal device to perform the method of the first aspect or any one of the possible implementations of the third aspect or any one of the possible implementations of the fifth aspect.

In a tenth aspect, there is provided a network device comprising: a processor, a transceiver, and a memory. Wherein the memory is configured to store computer-executable instructions that, when executed by the network device, cause the network device to perform the method of the second aspect or any one of the possible implementations of the fourth aspect or any one of the possible implementations of the sixth aspect.

In an eleventh aspect, a communication device is provided that includes a processor. The processor is coupled to the memory and operable to execute instructions in the memory to implement the method of the first aspect or any one of the possible implementations of the third aspect or any one of the possible implementations of the fifth aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, and the processor is coupled to the communication interface.

In one implementation, the communication device is a terminal device, and the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in the terminal device. When the communication means is a chip arranged in the terminal device, the communication interface may be an input/output interface.

Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.

In a twelfth aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and operable to execute instructions in the memory to implement the method of the second aspect or any one of the possible implementations of the fourth aspect or any one of the possible implementations of the sixth aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, and the processor is coupled to the communication interface.

In one implementation, the communication device is a network device, and the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in a network device. When the communication means is a chip configured in a network device, the communication interface may be an input/output interface.

In a thirteenth aspect, there is provided a processing apparatus comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal via the input circuit and transmit a signal via the output circuit, such that the processor performs the method of the first aspect or any one of the possible implementations of the third aspect or any one of the possible implementations of the fifth aspect.

In a fourteenth aspect, there is provided a processing apparatus comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal via the input circuit and transmit a signal via the output circuit, such that the processor performs the method of the second aspect or any one of the possible implementations of the fourth aspect or any one of the possible implementations of the sixth aspect.

In a fifteenth aspect, a processing apparatus is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory and is configured to receive a signal via the receiver and to transmit a signal via the transmitter to perform the method of the first aspect or any one of the possible implementations of the third aspect or any one of the possible implementations of the fifth aspect.

Optionally, the processor is one or more, and the memory is one or more.

Alternatively, the memory may be integrated with the processor or the memory may be separate from the processor.

In a sixteenth aspect, a processing device is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory and to receive a signal via the receiver and to transmit a signal via the transmitter to perform the method of the second aspect or any one of the possible implementations of the fourth aspect or any one of the possible implementations of the sixth aspect.

Optionally, the processor is one or more, and the memory is one or more.

In a specific implementation process, the processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the output signal may be output by, for example and without limitation, a transmitter and transmitted by a transmitter, and the input circuit and the output circuit may be the same circuit, which functions as the input circuit and the output circuit, respectively, at different times. The embodiments of the present application do not limit the specific implementation manner of the processor and the various circuits.

In a specific implementation process, the memory may be a non-transient (non-transitory) memory, for example, a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips.

It should be appreciated that the related data interaction process, for example, transmitting the indication information, may be a process of outputting the indication information from the processor, and the receiving the capability information may be a process of receiving the input capability information by the processor. Specifically, the data output by the processor may be output to the transmitter, and the input data received by the processor may be from the receiver. Wherein the transmitter and receiver may be collectively referred to as a transceiver.

The processing apparatus in the thirteenth aspect, the fourteenth aspect, the fifteenth aspect, or the sixteenth aspect described above may be one chip, the processing apparatus may be implemented by hardware or software, and when implemented by hardware, the processing apparatus may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processing means may be a general purpose processor implemented by reading software code stored in a memory, which may be integrated in the processing means, or may be external to the processing means, and may exist separately.

A seventeenth aspect provides a computer readable storage medium storing a program for causing a computer to perform the method of the first aspect or any one of the possible implementations of the second aspect or any one of the possible implementations of the third aspect or any one of the possible implementations of the fourth aspect or any one of the possible implementations of the fifth aspect or any one of the possible implementations of the sixth aspect.

In an eighteenth aspect, there is provided a computer program product comprising: computer program code which, when run by a communication unit, a processing unit or a transceiver, a processor of a communication device, causes the communication device to perform the method of the first aspect or any one of the possible implementations of the second aspect or any one of the possible implementations of the third aspect or any one of the possible implementations of the fourth aspect or any one of the possible implementations of the fifth aspect or any one of the possible implementations of the sixth aspect.

These and other aspects of the invention will be apparent from and elucidated with reference to the embodiment(s) described hereinafter.

Drawings

Fig. 1a is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 1b is a schematic diagram of another communication system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a network device and a terminal device provided in an embodiment of the present application;

fig. 3 is a schematic diagram of a protocol stack structure of a communication device according to an embodiment of the present application;

Fig. 4 is a schematic diagram of a reporting flow of downlink channel CSI provided in an embodiment of the present application;

fig. 5 is a schematic diagram of a reporting flow of another downlink channel CSI provided in an embodiment of the present application;

fig. 6 is a flow chart of a method for reporting a frequency domain component according to an embodiment of the present application;

fig. 7 is a flow chart of a method for reporting spatial components according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a chip according to an embodiment of the present application.

Detailed Description

For a better understanding of the embodiments of the present application, the following description is made before the embodiments of the present application are presented.

First, in this application, "for indicating" may include for direct indication and for indirect indication. When describing a certain "indication information" for indicating a, the indication information may be included to directly indicate a or indirectly indicate a, and does not necessarily represent that the indication information carries a.

The information indicated by the indication information is referred to as information to be indicated, and in a specific implementation process, there are various ways of indicating the information to be indicated, for example, but not limited to, the information to be indicated may be directly indicated, such as the information to be indicated itself or an index of the information to be indicated. The information to be indicated can also be indicated indirectly by indicating other information, wherein the other information and the information to be indicated have an association relation. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance. For example, the indication of the specific information may also be achieved by means of a pre-agreed (e.g., protocol-specified) arrangement sequence of the respective information, thereby reducing the indication overhead to some extent. And meanwhile, the universal part of each information can be identified and indicated uniformly, so that the indication cost caused by independently indicating the same information is reduced.

The specific indication means may be any of various existing indication means, such as, but not limited to, the above indication means, various combinations thereof, and the like. Specific details of various indications may be referred to the prior art and are not described herein. As can be seen from the above, for example, when multiple pieces of information of the same type need to be indicated, different manners of indication of different pieces of information may occur. In a specific implementation process, a required indication mode can be selected according to specific needs, and in this embodiment of the present application, the selected indication mode is not limited, so that the indication mode according to the embodiment of the present application should be understood to cover various methods that can enable a party to be indicated to learn information to be indicated.

The information to be indicated can be sent together as a whole or can be divided into a plurality of pieces of sub-information to be sent separately, and the sending periods and/or sending occasions of the sub-information can be the same or different. The specific transmission method is not limited in this application. The transmission period and/or the transmission timing of the sub-information may be predefined, for example, predefined according to a protocol, or may be configured by the transmitting end device by transmitting configuration information to the receiving end device. The configuration information may include, for example, but not limited to, one or a combination of at least two of radio resource control (radio resource control, RRC) signaling, medium access control (medium access control, MAC) layer signaling, and physical layer signaling. Wherein the MAC layer signaling includes, for example, a MAC Control Element (CE); physical (PHY) layer signaling includes, for example, downlink control information (downlink control information, DCI).

Second, the first, second and various numerical numbers in the embodiments shown below are merely for convenience of description and are not intended to limit the scope of the embodiments of the present application. For example, different indication information is distinguished.

Third, "predefined" or "preconfiguration" may be implemented by pre-storing corresponding codes, tables, or other manners in devices (e.g., including terminal devices and network devices) that may be used to indicate relevant information, and the specific implementation of the present application is not limited. Where "save" may refer to saving in one or more memories. The one or more memories may be provided separately or may be integrated in an encoder or decoder, processor, or communication device. The one or more memories may also be provided separately as part of a decoder, processor, or communication device. The type of memory may be any form of storage medium, and this application is not limited in this regard.

Fourth, the "protocol" referred to in the embodiments of the present application may refer to a standard protocol in the field of communications, and may include, for example, a long term evolution (long term evolution, LTE) protocol, a new radio access technology (new radio access technology, NR) protocol, and related protocols applied in future communication systems, which are not limited in this application.

Fifth, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, 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, and c may represent: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c. Wherein a, b and c can be single or multiple respectively.

Sixth, in the embodiments of the present application, the descriptions of "when … …", "in the case of … …", "if" and the like all refer to that the device (e.g., the terminal device or the network device) will make a corresponding process under some objective condition, and are not limited in time, nor do the devices (e.g., the terminal device or the network device) require an action of determining when implemented, nor do other limitations mean that there are any other limitations.

In the description of the present application, "/" means "or" unless otherwise indicated, for example, a/B may mean a or B. "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. Furthermore, "at least one" means one or more, and "a plurality" means two or more. The terms "first," "second," and the like do not limit the number and order of execution, and the terms "first," "second," and the like do not necessarily differ.

Seventh, in the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

The technical scheme provided by the application can be applied to various communication systems, such as: LTE system, LTE frequency division duplex (frequency division duplex, FDD) system, fifth generation (5th Generation,5G) mobile communication system or NR, future mobile communication system or multiple communication convergence system (e.g., sixth generation mobile communication system), etc. The 5G mobile communication system may include a non-independent Networking (NSA) system and an independent networking (SA) system.

The application scenarios of the technical solution provided in the present application may include various scenarios such as machine-type communication (machine type communication, MTC), inter-machine communication long term evolution technology (long term evolution-machine, LTE-M), device-to-device (D2D), machine-to-machine (machine to machine, M2M), internet of things (internet of things, ioT), macro-micro communication, enhanced mobile broadband (enhanced mobile broadband, eMBB), ultra-high reliability and ultra-low latency communication (ultra-relay & low latency communication, ul lc), and mass internet of things communication (massive machine type communication, mctc). Among other things, ioT scenarios may include, for example, the internet of vehicles, where the communication means in the internet of vehicles system are collectively referred to as vehicle-to-other devices (V2X, X may represent anything), e.g., the V2X may include: vehicle-to-vehicle (vehicle to vehicle, V2V) communication, vehicle-to-infrastructure (vehicle to infrastructure, V2I) communication, vehicle-to-pedestrian communication (vehicle to pedestrian, V2P) or vehicle-to-network (vehicle to network, V2N) communication, etc. These scenarios may include, but are not limited to: a communication scenario between terminals, a communication scenario between a network device and a network device, a communication scenario between a network device and a terminal, etc. The following description will take the application of the technical solution of the present application to the scenario where the network device and the terminal communicate as an example.

In addition, the network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided in the embodiments of the present application, and as a person of ordinary skill in the art can know, with evolution of the network architecture and appearance of a new service scenario, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems.

For easy understanding of the embodiments of the present application, a communication system suitable for the frequency domain component reporting method provided in the embodiments of the present application will be described in detail with reference to fig. 1a and 1 b. The communication system comprises a plurality of network devices and at least one terminal device. As shown in fig. 1a, the communication system comprises three network devices, TRP ₁ 、TRP ₂ And TRP ₃ And a terminal device, i.e., a User Equipment (UE). TRP (TRP) ₁ 、TRP ₂ And TRP ₃ Cooperate to communicate with the UE in common. TRP (TRP) ₁ 、TRP ₂ And TRP ₃ A coordinated multipoint (Coordinated multipoint, coMP) technique may be employed to provide communication services to UEs. Alternatively, the CoMP techniques may include coherent joint transmission (coherent joint transmission, CJT) and incoherent joint transmission (non-coherent joint transmission, NCJT). TRP (TRP) ₁ 、TRP ₂ And TRP ₃ A TRP cooperation set of the UE is constructed. For example, the TRP collaboration set may include a control node, e.g., TRP ₁ . The control node may determine and send configuration information to the UE and receive reported information from the UE. Optionally, the control node may also send the information to other TRPs (e.g., TRPs ₂ Or TRP ₃ ) And sending configuration information and forwarding part or all of information reported by the UE. Fig. 1b is a schematic diagram of yet another communication system provided in an embodiment of the present application, the communication system including at least one base station, at least one UE, and a plurality of TRPs. As shown in fig. 1b, the TRP cooperation set of the UE includes TRPs ₁ 、TRP ₂ And TRP ₃ . Illustratively, a base station may be used to control (or schedule) TRPs ₁ 、TRP ₂ And TRP ₃ . TRP is indicated by dotted line in FIG. 1b ₁ 、TRP ₂ And TRP ₃ These three TRPs may be controlled by the base station. Illustratively, the base station may determine configuration information and determine the configuration information to the TRP (e.g., TPR ₁ 、TRP ₂ Or TRP ₃ Etc.) transmits the configuration information. For example, after TRP1 receives the configuration information, the configuration information may be sent to the UE. For another example, the base station may directly transmit configuration information or the like to the UE. TRP (e.g. TPR ₁ 、TRP ₂ Or TRP ₃ Etc.) may receive the reported information from the UE. For another example, the base station may receive the reported information from the UE, and may also transmit the information to the TRP (e.g., TPR ₁ 、TRP ₂ Or TRP ₃ Etc.) forwards some or all of the information reported by the UE. It should be noted that in fig. 1a and fig. 1b, a plurality of TRPs may cooperate to communicate with a UE, which may be referred to as a multi-site communication scenario, where one TRP may be understood as one site. If only one TRP is in communication with the UE, it is referred to as a single site communication scenario. It should be understood that the communication systems shown in fig. 1a and 1b are only examples, for eachReference is also made to the following for a specific description of the communication means.

The above-mentioned respective communication devices, such as TRPs in FIGS. 1a and 1b ₁ 、TRP ₂ 、TRP ₃ And a terminal device UE, a plurality of antennas may be configured. The plurality of antennas may include at least one transmitting antenna for transmitting signals and at least one receiving antenna for receiving signals. In addition, each communication device may additionally include a transmitter chain and a receiver chain, each of which may include a plurality of components (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.) associated with the transmission and reception of signals, as will be appreciated by one skilled in the art. Thus, communication between the network device and the terminal device may be via multiple antenna technology.

Optionally, the communication system may further include a network controller, a mobility management entity, and other network entities, where embodiments of the present application are not limited.

It should be understood that fig. 1a and fig. 1b are only schematic diagrams, and do not constitute a limitation on the applicable scenario of the technical solution provided in the present application.

In this embodiment of the present application, the network device may be any device having a wireless transceiver function. The apparatus includes, but is not limited to: an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a micro base station (also referred to as a small station), a macro base station, a relay station, an access point, an eNB in an IoT or a narrowband IoT (NB-internet of things, NB-IoT), an access point (wireless fidelity, wiFi) in a wireless fidelity (access point, AP), a wireless relay Node, a wireless backhaul Node, a transmission point (transmission point, TP), or a transmission reception point (transmission and reception point, TRP), etc., may also be 5G, e.g., NR, a gNB in a system, or a transmission point (TRP or TP), one or a group of base stations (including multiple antenna panels) in a 5G system, or may also be a network Node constituting a gNB or a transmission point, etc., without limitation to this application.

The network device, e.g. a base station, as referred to in the present application typically comprises a baseband unit (BBU), a remote radio unit (remote radio unit, RRU) or an active antenna processing unit (active antenna unit, AAU), an antenna, and a feeder for connecting the RRU/AAU and the antenna. Wherein the BBU is responsible for signal modulation. The RRU is used for being responsible for radio frequency processing. The antenna is used for converting between the cable uplink traveling wave and the space wave in the air. On the one hand, the distributed base station greatly shortens the length of the feeder line between the RRU/AAU and the antenna, can reduce signal loss and can also reduce the cost of the feeder line. On the other hand, the RRU/AAU and the antenna are smaller, and can be installed in a random manner, so that the network planning is more flexible. Besides RRU/AAU remote, BBU can be centralized and placed in a Central Office (CO), and the quantity of base station rooms can be greatly reduced, the energy consumption of matched equipment, particularly air conditioner can be reduced, and a large amount of carbon emission can be reduced by the centralized mode. In addition, after the scattered BBUs are concentrated to become a BBU baseband pool, unified management and scheduling can be realized, and resource allocation is more flexible. In this mode, all physical base stations evolve into virtual base stations. And all the virtual base stations share information such as data receiving and transmitting, channel quality and the like of users in the BBU baseband pool and cooperate with each other so that joint scheduling is realized.

In some deployments, a base station may include a Centralized Unit (CU) and a Distributed Unit (DU). The base station may also include an active antenna unit (active antenna unit, AAU). CU realizes part of the functions of the base station and DU realizes part of the functions of the base station. For example, the CU is responsible for handling non-real-time protocols and services, implementing radio resource control, and functions of the packet data convergence layer protocol (packet data convergence protocol, PDCP) layer. The DU is 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 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 is eventually changed into the information of the PHY layer or is converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling or PDCP layer signaling, may also be considered as being 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 the RAN, or may be divided into network devices in a Core Network (CN), which is not limited in this application.

The network device provides services for the cell, and the terminal device communicates with the cell through transmission resources (e.g., frequency domain resources, or spectrum resources) allocated by the network device, where the cell may belong to a macro base station (e.g., macro eNB or macro gNB, etc.), or may belong to a base station corresponding to a small cell (small cell), where the small cell may include: urban cells (metro cells), micro cells (micro cells), pico cells (pico cells), femto cells (femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services.

In the embodiments of the present application, the terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment.

The terminal device may be a device providing voice/data connectivity to a user, e.g., a handheld device with wireless connectivity, an in-vehicle device, etc. Currently, some examples of terminals may be: a mobile phone (mobile phone), a tablet (pad), a computer with wireless transceiver function (e.g., a notebook, a palm, etc.), a mobile internet device (mobile internet device, MID), a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in an industrial control (industrial control), a wireless terminal in an unmanned-drive (self-drive), a wireless terminal in a telemedicine (telemedia), a wireless terminal in a smart grid (smart grid), a wireless terminal in a transportation security (transportation safety), a wireless terminal in a smart city (smart city), a wireless terminal in a smart home (smart home), a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a wireless terminal in a wearable device, a future-Public land mobile Network (Public Network) or a Public land mobile Network (35G, a Public Network, a Public land mobile Network (Public land mobile Network) or the like.

The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wearing and developing wearable devices by applying a wearable technology, 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.

Furthermore, the terminal device may also be a terminal device in an IoT system. IoT is an important component of future information technology development, and its main technical feature is to connect an item with a network through a communication technology, so as to implement man-machine interconnection and an intelligent network for object interconnection. IoT technology may enable massive connectivity, deep coverage, and terminal power saving through, for example, narrowband (NB) technology.

In addition, the terminal device may further include sensors such as an intelligent printer, a train detector, and a gas station, and the main functions include collecting data (part of the terminal device), receiving control information and downlink data of the network device, and transmitting electromagnetic waves to transmit uplink data to the network device.

The terminal is used for providing voice and/or data connectivity services to the user. The terminals may be variously named, for example, user Equipment (UE), access terminals, terminal units, terminal stations, mobile stations, remote terminals, mobile devices, wireless communication devices, terminal agents or terminal apparatuses, etc. Alternatively, the terminal 20 may be a handheld device, an in-vehicle device, a wearable device, or a computer with a communication function, which is not limited in this application. For example, the handheld device may be a smart phone. The in-vehicle device may be an in-vehicle navigation system. The wearable device may be a smart bracelet or VR device. The computer may be a PDA computer, a tablet computer, or a laptop computer (laptop computer).

Fig. 2 is a schematic hardware structure of a network device and a terminal device according to an embodiment of the present application.

The terminal device 100 comprises a processor 101 and a transceiver 103. Optionally, the terminal device 100 may further comprise an output device 104, an input device 105 and a memory 102. Wherein the processor 101, the memory 102 and the transceiver 103 communicate with each other through an internal connection path, the memory 102 is used for storing instructions, and the processor 101 is used for executing the instructions stored in the memory 102 to control the transceiver 103 to transmit signals and/or receive signals.

The processor 101 has signal processing capabilities and may be a general purpose central processing unit (central processing unit, CPU), microprocessor, digital signal processor (digital signal processor, DSP), application specific integrated circuit (application-specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA), neural network processing unit (neural processing unit, NPU), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. Processor 101 may also include multiple CPUs, and processor 101 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor 101 may refer to one or more devices, circuits, or processing cores for processing data (e.g., computer program instructions).

The memory 102 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a compact disc read-only memory (compact disc read-only memory) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, without limitation of this application. The memory 102 may be independent and connected to the processor 101 through an internal connection path; memory 102 may also be integrated with processor 101. The memory 102 is used for storing application program codes for executing the scheme of the application, and the execution is controlled by the processor 101. The processor 101 is configured to execute computer program code stored in the memory 102, thereby implementing the methods provided in the embodiments of the present application.

The transceiver 103 may use any transceiver-like device for communicating with other devices or communication networks, such as ethernet, radio access network (radio access network, RAN), wireless local area network (wireless local area networks, WLAN), etc. The transceiver 103 may include a transmitter Tx and/or a receiver Rx. The transceiver 103 may further include antennas, the number of which may be one or more. The processor 101 and memory 102 and transceiver 103 may be devices integrated on different chips. For example, the processor 101 and the memory 102 may be integrated in a baseband chip and the transceiver 103 may be integrated in a radio frequency chip. The processor 101 and memory 102 may also be devices integrated on the same chip as the transceiver 103. The present application is not limited in this regard. The transceiver 103 may also be a communication interface such as an input/output interface, circuitry, etc. The transceiver 103 may be integrated in the same chip as the processor 101 and the memory 102, e.g. in a baseband chip.

The output device 104 communicates with the processor 101 and may display information in a variety of ways. For example, the output device 104 may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a Cathode Ray Tube (CRT) display device, or a projector (projector), or the like. The input device 105 is in communication with the processor 101 and may receive user input in a variety of ways. For example, the input device 105 may be a mouse, a keyboard, a touch screen device, a sensing device, or the like.

The network device 200 comprises a processor 201 and a transceiver 203. Optionally, the network device 200 may also include a memory 202 and a network interface 204. The processor 201, the memory 202, the transceiver 203, and the network interface 204 are connected by a bus. The network interface 204 is used to connect with a core network device through a link (such as an S1 interface), or connect with a network interface of another network device through a wired or wireless link (such as an X2/Xn interface) (not shown in the figure), which is not limited in this application. In addition, the description of the processor 201, the memory 202 and the transceiver 203 may refer to the description of the processor 101, the memory 102 and the transceiver 103 in the terminal device 100, which is not repeated herein.

For example, as shown in fig. 3, a part of control plane and data plane protocol stack structures of a communication apparatus (including a network device and a terminal device) related to the present application may be provided with the following modules:

RRC signaling interaction module: and the network equipment and the terminal equipment are used for sending and receiving the RRC signaling, for example, the network equipment sends the RRC signaling to the terminal equipment, and the terminal equipment receives the RRC signaling from the network equipment.

MAC signaling interaction module: and the network equipment and the terminal equipment are used for sending and receiving the modules of the MAC-CE signaling, such as the network equipment sends the MAC-CE signaling to the terminal equipment, and the terminal equipment receives the MAC-CE signaling from the network equipment.

PHY signaling and data interaction module: and the network equipment and the terminal equipment are used for sending and receiving uplink/downlink control signaling and uplink/downlink data. For example, the network device transmits a physical downlink control channel (physical downlink control channel, PDCCH), such as DCI in PDCCH, to the terminal device, and the network device transmits a physical downlink shared channel (physical downlink shared channel, PDSCH), such as downlink data in PDSCH, to the terminal device. The terminal device sends a physical uplink control channel (physical uplink control channel, PUCCH), such as uplink control information (uplink control information, UCI) in the PUCCH, to the network device, and the terminal device sends a physical uplink shared channel (physical uplink shared channel, PUSCH), such as uplink data in the PUSCH, to the network device.

It should be understood that the modules shown in fig. 3 are only exemplary, and the network device and the terminal device may further include other communication modules, such as a radio link control (radio link control, RLC) module, a packet data convergence layer protocol (packet data convergence protocol, PDCP) module, or a service data adaptation protocol (service data adaptation protocol, SDAP) module, etc., which are not limited in this application.

In order to facilitate understanding of the embodiments of the present application, the terms referred to in the embodiments of the present application are briefly described below.

1) Precoding technology: the transmitting device may process the signal to be transmitted by means of the precoding matrix matched with the channel resource under the condition of known CSI, so that the precoded signal to be transmitted is adapted to the channel, thereby improving the quality of the signal received by the receiving device (such as signal to interference plus noise ratio (signal to interference plus noise ratio, SINR) and the like), and reducing the complexity of the receiving device in eliminating the influence between channels. By adopting the precoding technology, the sending device can send a plurality of parallel data streams occupying the same time-frequency resource to one receiving device, namely single-user multiple-input multiple-output (SU-MIMO), and can also transmit data on the same time-frequency resource with a plurality of receiving devices, namely multi-user multiple-input multiple-output (multiple user multiple input multiple output, MU-MIMO). It should be noted that the related descriptions about the precoding technology are only examples for easy understanding, and are not intended to limit the protection scope of the embodiments of the present application. In a specific implementation process, the sending device may also perform precoding in other manners. For example, when the channel state information is not known, precoding is performed using a pre-set precoding matrix or a weighting method. For brevity, the details thereof are not described in detail herein.

2) Precoding matrix indication (precoding matrix indicator, PMI): the method can be used for indicating the precoding matrix, and the transmitting equipment restores the precoding matrix based on the PMI. In general, a receiving device determines a precoding matrix through channel measurement, and reports a PMI corresponding to the precoding matrix to a transmitting device, and the transmitting device determines precoding for transmitting data to the receiving device according to the received PMI. Wherein the precoding matrix may be a precoding matrix determined by the receiving device based on the channel matrix of each frequency domain unit. The frequency domain units, i.e. units of frequency domain resources, may represent different granularity of frequency domain resources. The frequency domain unit may be, but is not limited to, a subband (subband), a Resource Block (RB), a subcarrier, a resource block group (resource block group, RBG), or a precoding resource block group (precoding resource block group, PRG), etc. Wherein, one or more parts of the sub-band can be composed of one or more RBs, RGB; illustratively, 1 RB corresponds to 12 consecutive subcarriers in the frequency domain, and 1 RBG corresponds to {2,4,8, 16} RBs in the frequency domain; PRG is a precoding granularity to indicate how many RBs can use the same precoding. The channel matrix may be determined by the receiving device by way of channel estimation or the like or based on reciprocity of the channel. It should be understood that the specific method for determining the precoding matrix by the receiving device is not limited to the foregoing, and the specific implementation may refer to the prior art, and is not listed here for brevity. For example, the precoding matrix may be obtained by performing singular value decomposition (singular value decomposition, SVD) on a channel matrix or a covariance matrix of the channel matrix, or may be obtained by performing eigenvalue decomposition (eigenvalue decopomsition, EVD) on a covariance matrix of the channel matrix. It should be understood that the above-listed determination of the precoding matrix is merely an example and should not constitute any limitation to the present application. The manner in which the precoding matrix is determined may be referred to in the art and is not listed here for brevity.

3) Antenna port: or port, may be understood as a transmitting antenna identified by the receiving device or a spatially distinguishable transmitting antenna. One antenna port may be preconfigured for one virtual antenna, which may be one physical antenna or a weighted combination of multiple physical antennas. One antenna port may correspond to one reference signal, and thus, one antenna port may be referred to as a port of one reference signal, for example, a CSI reference signal (CSI reference signal, CSI-RS) port, a demodulation reference signal (demodulation reference signal, DMRS) port, a channel sounding reference signal (sounding reference signal, SRS) port, and the like. Further, one antenna port may be referred to as one transceiver unit (TxRU).

4) Spatial components: the beam vector, the spatial beam basis vector (spatial beam basis vector), and the spatial basis vector may also be referred to as "spatial beam basis vector". The length of the spatial component may be the number of transmit antenna ports B in one polarization direction, B being a positive integer greater than 1. For example, the spatial component is a column vector or a row vector with a length B, and then the B column vectors or row vectors respectively correspond to the B transmitting antenna ports, which is not limited in this application. Each element in the spatial component may represent a weight of each antenna port. Based on the weight of each antenna port represented by each element in the spatial component, the signals of each antenna port are linearly overlapped, so that a region with stronger signals can be formed in a certain direction or certain directions in space.

Alternatively, the spatial components may be determined based on discrete fourier transform (discrete Fourier transform, DFT) vectors. In other words, the spatial component may be a DFT vector. The spatial component may be, for example, a DFT vector defined in an enhanced type II (eType II) codebook in technical Specification TS 38.214 of third Generation partnership project (3rd generation partnership project,3GPP) Release 16 (Release 16, R16), or a DFT vector defined in a further enhanced type II (further enhanced type II, feType II) codebook in TS 38.214 of R17.

5) Frequency domain components: which may also be referred to as a frequency domain basis vector, is a vector representing the law of variation of the channel in the frequency domain. A frequency domain component may represent a law of variation. Since signals may travel multiple paths from the transmit antenna to the receive antenna as they travel through the wireless channel. Multipath delays cause frequency selective fading, i.e., variations in the frequency domain channel. Therefore, the change rule of the channel in the frequency domain caused by time delay on different transmission paths can be represented by different frequency domain components.

The length of the frequency domain component can be determined by the number of frequency domain units to be reported configured by the network side in the reporting bandwidth, and can also be a protocol predefined value. The present application is not limited in this regard. The reporting bandwidth may be indicated by, for example, a CSI reporting bandwidth (CSI-reporting band) carried in a CSI reporting configuration in a higher layer signaling (e.g., RRC message).

In the FDD system, since the frequency point used by the terminal device to transmit the uplink data is different from the frequency point used by the network device to transmit the downlink data, there is no complete channel reciprocity between the uplink channel and the downlink channel. There are generally two ways for a network device to acquire CSI for a downlink channel. In the first mode, CSI of the downlink channel is determined by the terminal device through measurement of a downlink reference signal sent by the network device, and is reported to the network device. In the second mode, by using the partial reciprocity information of the uplink channel and the downlink channel, for example, the angle and the time delay of the uplink channel and the downlink channel have reciprocity, the terminal device determines the CSI of the downlink channel and reports the CSI to the network device through the measurement of the uplink reference signal sent by the terminal device by the network device and the measurement of the pre-coded downlink reference signal sent by the terminal device by the network device.

Fig. 4 provides a schematic diagram of a reporting flow of the downlink channel CSI, which corresponds to the first mode, and includes the following steps:

s401: the network device sends channel measurement configuration information to the terminal device.

For example, the channel measurement configuration information includes time-frequency resources for channel measurement, and the like.

S402: the network device sends a downlink reference signal for channel measurement to the terminal device.

For example, the downlink reference signal may be a downlink channel state information reference signal (channel state information reference signal, CSI-RS) or a demodulation reference signal (demodulation reference signal, DMRS), which is not limited in this application.

The terminal equipment receives downlink reference signals based on the channel measurement configuration information.

S403: and the terminal equipment determines downlink channel CSI based on the received downlink reference signal and reports the downlink channel CSI to the network equipment.

Wherein the CSI of the downlink channel comprises any combination of: precoding matrix indicator (precoding matrix indicator, PMI), rank Indicator (RI), channel quality indicator (channel quality indicator, CQI), channel state information reference signal (channel state information reference signal, CSI-RS), resource indicator (CSI-RS resource indicator, CRI), and Layer Indicator (LI). The PMI may include indication information of a frequency domain component selected by the terminal device, indication information of a spatial domain component, indication information of a non-zero combining coefficient, and the like.

In downlink data transmission, a network device determines a precoding matrix corresponding to downlink data transmission based on downlink channel CSI reported by a terminal device, and performs precoding processing on downlink data based on the precoding matrix and then sends the downlink data. It should be appreciated that the mechanism by which the network device determines the precoding matrix in such CSI reporting mode may be referred to as a non-precoding (NP) codebook mechanism.

Fig. 5 provides a schematic diagram of a reporting flow of downlink channel CSI based on FDD partial reciprocity, which corresponds to the second mode, and includes the following steps:

s501: and the terminal equipment transmits the uplink reference signal to the network equipment.

For example, the uplink reference signal is a sounding reference signal (sounding reference signal, SRS).

S502: and the network equipment carries out channel estimation on the uplink channel and acquires partial prior information of the downlink channel.

For example, the partial a priori information of the downlink channel includes angle and delay information of the downlink channel. By means of FDD partial reciprocity, the angle and time delay information of the downlink channel can be equivalent to the angle and time delay information of the uplink channel obtained by the network equipment for carrying out channel estimation on the uplink channel.

S503: the network device transmits a precoded downlink reference signal.

The network device generates precoding according to partial prior information, such as angle and delay information, of the downlink channel. And the network equipment performs precoding processing on the downlink reference signals and then sends the downlink reference signals to the terminal equipment.

And the terminal equipment receives the pre-coded downlink reference signal and performs channel measurement.

S504: and the terminal equipment determines downlink channel CSI based on the received pre-coded downlink reference signal and reports the downlink channel CSI to the network equipment.

It should be noted that, the downlink channel CSI reported by the terminal device in S504 may be only the nonreciprocal information of the uplink and downlink channels. For the reciprocal information of the uplink and downlink channels, such as part of the prior information of the downlink channel, the network device has already acquired in S502, so that the terminal device does not need to feed back in this step, thereby saving the feedback overhead.

In the downlink data transmission, the network device determines a precoding matrix corresponding to the downlink data transmission according to the partial prior information of the downlink channel and the downlink channel CSI reported by the terminal device in S504, and performs precoding processing on the downlink data based on the precoding matrix and then sends the downlink data. It should be appreciated that the mechanism by which the network device determines the precoding codebook in such CSI reporting mode may be referred to as a Port Selection (PS) codebook mechanism.

In the codebook technical specifications of R16TypeII and R17TypeII of 3GPP, a precoding codebook (may also be referred to as a precoding matrix) may be expressed as follows:

wherein the upper corner mark H represents the conjugate transpose. For the precoding codebook of R16TypeII,for the spatial selection matrix, 2L beams are selected from B spatial beams, and +.>Is a frequency domain compression matrix, which represents that R columns are selected from a DFT matrix set, N3 is the frequency domain RB resource number or subband number, < >>Is a combined coefficient quantized according to a quantization criterion. Precoding codebook for R17TypeII,>selecting a matrix for the ports, representing selecting K from B ports ₁ Ports (I)>Is a frequency domain compression matrix, which represents that R columns are selected from a DFT matrix set, N3 is the frequency domain RB resource number or subband number, < >>Is a combined coefficient quantized according to a quantization criterion. After the terminal equipment completes channel measurement, measurement information needs to be reported in UCI, specifically including a selected airspace/port (W ₁ ) Indication of frequency domain component (W _f ) Corresponding airspace/portWeighting coefficients of frequency domain components (W ₂ ) And the position of the weighting coefficient in the codebook.

In a multi-TRP transmission system, a network device needs to acquire CSI of a downlink channel between a terminal device and each TRP in a TRP cooperation set so as to enable the multi-TRP cooperation to perform downlink data transmission. When MIMO technology is used for communication, the downlink channel CSI reported by the terminal device needs to include indication information of the frequency domain component selected by the terminal device for each TRP, so that the network device can determine a precoding codebook used by each TRP to transmit downlink data. In the prior art, the terminal device may report the indication information of the frequency domain component corresponding to each TRP respectively. When the multiple TRPs perform CJT cooperative transmission, the multiple TRPs jointly transmit data to the terminal equipment by using the same time-frequency resource. In this case, the number of frequency domain components selected by the terminal device is the same for each TRP. When the multiple TRPs perform NCJT cooperative transmission, the multiple TRPs may use orthogonal time-frequency resources to jointly transmit data to the terminal device, in which case the number of frequency domain components selected by the terminal device may be the same or different for each TRP. For the case where each TRP uses the same number of frequency domain components, for example, for a TRP cooperation set containing K TRPs, assuming that the terminal device needs to use M bits to represent its frequency domain component selected for each TRP in the TRP cooperation set, the terminal device needs to use k×m bits to report the frequency domain component corresponding to the TRP cooperation set selected by the terminal device. Such a reporting manner may be referred to as a manner in which frequency domain components are respectively indicated, that is, the terminal device reports the frequency domain components selected for each TRP, respectively. As the number of TRPs included in the TRP cooperation set increases, the overhead of reporting the corresponding frequency domain component by the terminal device increases linearly. How to enable the terminal equipment to report the corresponding frequency domain components more effectively and reduce the overhead of the air interface is a technical problem to be solved.

In view of this, the embodiments of the present application provide a method for reporting a frequency domain component, so as to reduce overhead as much as possible and improve efficiency of reporting the frequency domain component in a TRP collaboration scenario. In the reporting method, for the frequency domain components of the plurality of TRPs selected by the terminal equipment, the terminal equipment adopts a mode of jointly indicating the frequency domain components, and compared with a mode of respectively indicating the frequency domain components adopted in the prior art, the air interface overhead can be saved.

The method for reporting the frequency domain component provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

It should be understood that the following details of the method provided in the embodiments of the present application are given only for convenience of explanation and understanding, taking interaction between a network device and a terminal device as an example. This should not be construed as limiting the subject matter of the methods provided herein. For example, the terminal device shown in the following embodiments may be replaced with a component (such as a circuit, a chip system, or other functional modules capable of calling and executing a program) configured in the terminal device; the network device shown in the following embodiments may be replaced with a component (such as a circuit, a chip system, or other functional modules capable of calling a program and executing the program) configured in the network device. As long as channel information feedback can be achieved by the method provided according to the embodiment of the present application by running a program recorded with codes of the method provided according to the embodiment of the present application.

The following describes the technical solution of the present application in detail with reference to fig. 6 and fig. 7 by using specific method embodiments. It should be noted that fig. 6 and 7 are schematic flowcharts of the method embodiments of the present application, and show detailed communication steps or operations of the method, but these steps or operations are only examples, and other operations or variations of the various operations in fig. 6 and 7 may also be performed by the embodiments of the present application. Further, the individual steps in fig. 6 and 7 may be performed in a different order than presented in fig. 6 and 7, respectively, and it is possible that not all of the operations in fig. 6 and 7 are to be performed.

Fig. 6 shows a flowchart of a method for reporting a frequency domain component according to an embodiment of the present application. The method 600 is applied to interactions between a network device and a terminal device. In this embodiment, the network device may be one TRP in the TRP coordination set of the terminal device, or may be a device outside the TRP coordination set and having the capability of controlling each TRP in the TRP coordination set, which is not limited in this application. The network device may communicate with any one of the TRP's in the collaborative set of TRPs. The flow shown in fig. 6 includes the following steps:

S601, terminal equipment acquires the number of TRPs, first information and second information.

The number of TRPs is used to indicate the number of TRPs comprised by the TRP cooperation set of the terminal device, i.e. the number of cooperation TRPs. In the practice of the present application, it is assumed that the number of TRPs in the TRP cooperating set is K, which is an integer greater than 1.

Optionally, the terminal device receives information configured by the network device to measure downlink reference signals sent by the plurality of TRPs. And the terminal equipment acquires the number of the cooperative TRPs according to the configuration information.

In one possible implementation, the terminal device receives configuration information from the network device, where the configuration information is used to indicate K reference signal resources or K antenna port groups. The K reference signal resources are in one-to-one correspondence with the K TRPs, and the K antenna port groups are in one-to-one correspondence with the K TRPs. It should be appreciated that one of the K antenna port groups includes at least one antenna port. Thereby, the terminal device acquires the number K of cooperative TRPs through the configuration information. The terminal device receives fourth information from the network device, wherein the fourth information is used to indicate K reference signal resources or K antenna port groups. And the terminal equipment acquires the number K of the cooperative TRPs according to the fourth information.

In another possible implementation, the terminal device receives configuration information from the network device, where the configuration information is used to indicate K 'reference signal resources or K' antenna port groups. The K 'reference signal resources are in one-to-one correspondence with the K' TRPs, and the K 'antenna port groups are in one-to-one correspondence with the K' TRPs. The terminal equipment determines K cooperative TRPs from K 'candidate cooperative TRPs, wherein K is less than or equal to K'. In other words, the network device configures the candidate cooperative TRP for the terminal device, and the terminal device determines the number K of cooperative TRPs participating in the cooperation from among the candidate cooperative TRPs. The terminal device receives fifth information from the network device, wherein the fifth information is used to indicate K 'reference signal resources or K' antenna port groups. The terminal equipment determines the number K of the cooperative TRPs according to the number K' of the candidate cooperative TRPs indicated by the fifth information.

In yet another possible implementation manner, the terminal device is explicitly notified of the number K of cooperative TRPs in the configuration information sent by the network device.

The configuration information may be sent by the network device to the terminal device via a signaling message. The signaling message may be at least one of the following signaling: RRC signaling, MAC-CE signaling, and DCI. It should be noted that, the configuration information may be carried in an existing signaling message of the 3GPP protocol, or may be carried in a newly defined signaling message.

The first information is used to indicate the number of frequency domain components. It should be understood that the frequency domain component number is the frequency domain component number corresponding to one TRP. In the embodiment of the application, each TRP in the TRP cooperative set corresponds to the same frequency domain component number. The frequency domain component number is the number of frequency domain components selected by the terminal device for one TRP. Illustratively, one TRP cooperation set contains 3 TRPs, and the number of frequency domain components is 2, which means that for each TRP of the 3 TRPs, the number of frequency domain components selected by the terminal device is 2.

In one possible implementation, the first information is predefined by the protocol.

In another possible implementation, the first information is configured by the network device to the terminal device. In other words, the network device determines the number of frequency domain components selected by the terminal device for one TRP and transmits to the terminal device through the configuration information.

In a further possible implementation, the first information is determined by negotiation between the network device and the terminal device. For example, the terminal device reports auxiliary information (such as capability information of the terminal device) to the network device, and the network device determines first information according to the auxiliary information and sends the first information to the terminal device.

Optionally, the first information is sent by the network device to the terminal device via a signaling message. The signaling message may be at least one of the following signaling: RRC signaling, MAC-CE signaling, and DCI. It should be noted that, the first information may be carried in an existing signaling message of the 3GPP protocol, or may be carried in a newly defined signaling message.

It should be understood that, after the terminal device obtains the number of frequency domain components, it is required to select a frequency domain component corresponding to the number of frequency domain components from the plurality of candidate frequency domain components, and report the indication information of the selected frequency domain components to the network device. In one possible implementation, the terminal device selects a specific number of frequency domain components directly from the plurality of candidate frequency domain components, the specific number being the same as the number of frequency domain components. For example, if the terminal device needs to select 3 frequency domain components from the 5 candidate frequency domain components, the terminal device selects 3 frequency domain components and transmits indication information of the 3 frequency domain components to the network device. In another possible implementation, the protocol presets or the network device configures the terminal device to default to select one or more specific frequency domain components, e.g. the terminal device defaults to an initial frequency domain component and/or a terminating frequency domain component of the plurality of candidate frequency domain components, in which case the specific number of frequency domain components selected by the terminal device is the number of frequency domain components minus the one or more specific frequency domain components. For example, the terminal device needs to select 3 frequency domain components among 5 candidate frequency domain components, and the terminal device is configured to select a first frequency domain component (i.e., an initial frequency domain component) of the 5 frequency domain components by default, the terminal device needs to select 2 frequency domain components among the remaining 4 candidate frequency domain components and transmit indication information of the 2 frequency domain components to the network device.

The first information may directly or indirectly indicate the number of frequency domain components. In other words, the terminal device may directly acquire the number of frequency domain components from the first information, or determine the number of frequency domain components according to the first information.

The second information is used to indicate the number of candidate frequency domain components. It should be understood that the number of candidate frequency domain components is the number of candidate frequency domain components corresponding to one TRP. In the embodiment of the application, each TRP in the TRP collaborative set corresponds to the same number of candidate frequency domain components. The candidate frequency domain component set corresponding to the number of candidate frequency domain components is a candidate set of frequency domain components for one TRP selected by the terminal device, that is, the terminal device selects the frequency domain component corresponding to the number of frequency domain components from the candidate frequency domain component set. Illustratively, one TRP cooperation set contains 3 TRPs, the number of frequency domain components is 2, and the number of candidate frequency domain components is 8, which means that for each of the 3 TRPs, the terminal device selects 2 frequency domain components from the 8 candidate frequency domain components.

In one possible implementation, the second information is predefined by the protocol.

In another possible implementation, the second information is configured to the terminal device by the network device. In other words, the network device determines the number of candidate frequency domain components for one TRP by the terminal device and transmits the same to the terminal device through the configuration information.

In a further possible implementation, the second information is determined by negotiation between the network device and the terminal device. For example, the terminal device reports auxiliary information (such as capability information of the terminal device) to the network device, and the network device determines second information according to the auxiliary information and sends the second information to the terminal device.

Optionally, the second information is sent by the network device to the terminal device via a signaling message. The signaling message may be at least one of the following signaling: RRC signaling, MAC-CE signaling, and DCI. It should be noted that the second information may be carried in an existing signaling message of the 3GPP protocol, or may be carried in a newly defined signaling message.

Illustratively, in the R16 technical specification of 3GPP, the protocol defines that, in a single site scenario, for the NP codebook and the PS codebook, the number of candidate frequency domain components is N3 and the number of frequency domain components is M1. When N3 is less than or equal to 19, the terminal equipment needs to select M1 frequency domain components from N3 candidate frequency domain components to report; when N3 > 19, the terminal device needs to select M1 frequency domain components from 2×m1 candidate frequency domain components for reporting. It should be understood that the above-mentioned value 19 is only an example, and that in practical applications the value may be another value, for example a value predefined by a protocol or configured by a network device.

For example, in the R17 technical specification of 3GPP, the protocol defines that in a single-site scenario, for a PS codebook, the window length of the frequency domain component is n=2 or n=4, that is, the number of candidate frequency domain components described above may be corresponding to n=2 or n=4; the number of frequency domain components is m2=1 or m2=2. Further, the R17 protocol specifies that the initial frequency-domain component of the candidate frequency-domain components is selected by default, i.e., whether n=2 or n=4, wherein the initial frequency-domain component is selected by default and does not need to be reported. In other words, for n=2 or n=4, if m2=1, the terminal device defaults to select the initial frequency domain component, so the terminal device does not need to report the selected frequency domain component; for n=2 and m2=2, the terminal device defaults to select all frequency domain components, so the terminal device does not need to report the selected frequency domain components; for n=4 and m2=2, the terminal device needs to select one frequency domain component from the other three candidate frequency domain components for reporting in addition to the default starting frequency domain component, so the terminal device needs to report the selected one frequency domain component.

The second information may directly or indirectly indicate the number of candidate frequency domain components. In other words, the terminal device may directly acquire the number of candidate frequency domain components from the second information, or determine the number of candidate frequency domain components according to the second information. For example, the second information may directly indicate the number of candidate frequency domain components N, corresponding to the R17 technical specification of 3 GPP. For another example, the second information may indirectly indicate the candidate frequency domain component number N3, corresponding to the R16 technical specification of 3 GPP. That is, N3 is determined by the terminal device according to the second information.

S602, the terminal equipment generates third information, wherein the third information is used for indicating the frequency domain component selected by the terminal equipment.

Wherein the third information is occupiedA number of bits; />Representing an upward rounding function; x is used for indicating the frequency domain component combination number, and X is an integer greater than or equal to 1.

The frequency domain component combination number is the frequency domain component combination number corresponding to the frequency domain component selected by the terminal device. It should be understood that the frequency domain component combination number is the frequency domain component combination number corresponding to one TRP in the TRP cooperation set. Assume that for one TRP, the number of candidate frequency domain components is Q, the number of frequency domain components is P, the number of frequency domain component combinations is X, wherein Q is an integer greater than 1, P is a positive integer, and P is 1.ltoreq.P.ltoreq.Q. It should be understood that in the case where there is a frequency domain component selected by default, the frequency domain component combination number is the frequency domain component combination number corresponding to the frequency domain component selected by the terminal device in addition to the frequency domain component selected by default. The frequency domain components that the terminal device needs to report are also selected frequency domain components in addition to the frequency domain components selected by default.

In one possible way of doing so,wherein C represents a combination formula. This means that the number of frequency domain component combinations determined by the terminal device is a number of combinations formed by arbitrarily selecting P frequency domain components from the Q candidate frequency domain components as one combination. It should be understood that- >Can also be written as +.>Or a form of C (Q, P). In this manner, the terminal device determines the number of combinations it needs to choose P frequency domain components from the Q candidate frequency domain components indicated to the network device.

In another possible way of doing so,this means that the number of frequency domain component combinations determined by the terminal device is the number of combinations formed by arbitrarily selecting P-1 frequency domain components from Q-1 candidate frequency domain components as one combination. In this manner, the terminal device determines the number of combinations it needs to choose P-1 frequency domain components from the Q-1 candidate frequency domain components indicated to the network device.For example, when the start frequency-domain component or the end frequency-domain component of the Q candidate frequency-domain components is selected as the reported frequency-domain component by default, the terminal device selects P-1 frequency-domain components other than the default frequency-domain component from the Q-1 candidate frequency-domain components.

In yet another possible way, the device comprises,wherein r is a positive integer and r is more than or equal to 2 and less than P. This means that the number of frequency domain component combinations determined by the terminal device is the number of combinations formed by arbitrarily selecting P-r frequency domain components from Q-r candidate frequency domain components as one combination. In this manner, the terminal device determines the number of combinations it needs to choose P-r frequency domain components from among the Q-r candidate frequency domain components indicated to the network device. For example, the protocol predefines that the terminal device selects P-r frequency domain components from the Q-r candidate frequency domain components when r frequency domain components of the Q candidate frequency domain components are frequency domain components reported by default.

For example, for reporting frequency domain components of R16 protocol, in the related art, in a single station scenario, the terminal device needs to indicate to the network device that the number of frequency domain components reported by the terminal device isNeed to adopt->A number of bits. When expanding to K TRP cooperation scenes, the terminal equipment adopts a mode of indicating frequency domain components respectively, and needs to indicate K times of the number of reported frequency domains to the network equipment>I.e. < ->In contrast, in the mode of frequency domain component joint indication of the embodiment of the present application, +.>The number of bits occupied by the third information generated by the terminal device isFor example, k=3, n3=8, m1=4, and if the frequency domain components are indicated separately, the terminal device needs to pass +.>The bits indicate the number of reported frequency domain components. By adopting the mode of frequency domain component joint indication provided by the embodiment of the application, the terminal equipment needs to pass through +.>A bit indicates the reported frequency domain component.

Table 1 shows a comparison of the number of bits occupied by the third information using the frequency domain component separate indication scheme and the frequency domain component joint indication scheme when n3=8, m1=4, and k has values of 3, 4, and 5, respectively. Therefore, the frequency domain component joint indication mode provided by the embodiment of the application can effectively reduce the overhead of the feedback air interface.

TABLE 1

K	Frequency domain component indication mode	Frequency domain component joint indication mode
			3	21 bits	19 bits
4	28 bits	25 bits
			5	35 bits	31 bits

For example, for reporting frequency domain components of R17 protocol, in the related art, in a single station scenario, the terminal device needs to indicate to the network device that the number of frequency domain components reported by the terminal device isNeed to adopt->A number of bits. When expanding to K TRP cooperation scenes, the terminal equipment adopts a mode of indicating frequency domain components respectively, and needs to indicate K times of the number of reported frequency domains to the network equipment>I.e. < ->In contrast, in the mode of frequency domain component joint indication of the embodiment of the present application, +.>The third information generated by the terminal device occupies a bit number of +.>

For example, k=3, n=4, m2=2, and if the frequency domain components are indicated separately, the terminal device needs to pass throughA bit indicates the reported frequency domain component. By adopting the mode of frequency domain component joint indication provided by the embodiment of the application, the terminal equipment needs to pass through +.>A bit indicates the reported frequency domain component. Illustratively, assume TRP ₁ The corresponding candidate frequency domain components are f respectively ₁₁ 、f ₁₂ 、f ₁₃ And f ₁₄ ；TRP ₂ The corresponding candidate frequency domain components are f respectively ₂₁ 、f ₂₂ 、f ₂₃ And f ₂₄ ；TRP ₃ The corresponding candidate frequency domain components are f respectively ₃₁ 、f ₃₂ 、f ₃₃ And f ₃₄ . For m2=2, since the terminal device reports the initial frequency domain transmission amount by default, the terminal device needs to select one frequency domain component from the remaining three candidate frequency domain components for reporting, i.e. at f ₁₂ 、f ₁₃ And f ₁₄ Is selected to be a frequency domain component, at f ₂₂ 、f ₂₃ And f ₂₄ Selecting a frequency domain component, and at f ₃₂ 、f ₃₃ And f ₃₄ Selecting one frequency domain component for reporting. In other words, for one TRP, the terminal device needs toBits to report its selected frequency domain component. In the mode of indicating the frequency domain components respectively, the terminal equipment uses 2 bits to indicate the frequency domain components at f ₁₂ 、f ₁₃ And f ₁₄ In a frequency domain, using 2 bits to indicate at f ₂₂ 、f ₂₃ And f ₂₄ In a frequency domain, using 2 bits to indicate at f ₃₂ 、f ₃₃ And f ₃₄ Therefore, the terminal device needs 6 bits in total to indicate the selected frequency domain component. In the frequency domain component joint indication mode, since the terminal equipment needs to be in f ₁₂ 、f ₁₃ And f ₁₄ In a frequency domain component selected from the plurality, at f ₂₂ 、f ₂₃ And f ₂₄ In a frequency domain component selected from the plurality, at f ₃₂ 、f ₃₃ And f ₃₄ The number of combinations of frequency domain components selected by the terminal device is +. >The total number of combinations of frequency domain components selected by the terminal device in the TRP set is therefore +.>The terminal device needs +.>Bits to indicate the selected frequency domain components.

Table 2 shows a comparison of the number of bits occupied by the third information using the frequency domain component separate indication scheme and the frequency domain component joint indication scheme when n=4 and m2= 2,K have values of 3, 4, and 5, respectively. Therefore, the frequency domain component joint indication mode provided by the embodiment of the application can effectively reduce the overhead of the feedback air interface.

TABLE 2

K	Frequency domain component indication mode	Frequency domain component joint indication mode
			3	6 bits	5 bits
4	8 bits of	7 bits
			5	10 bits	8 bits of

And S603, the terminal equipment sends third information to the network equipment. Accordingly, the network device receives the third information from the terminal device.

Optionally, the third information is included in PMI information, where the PMI information may be carried by UCI, where UCI may be used for the terminal device to feed back CSI of the downlink channel.

Optionally, the third information is sent to the network device as part of the information in the downlink channel CSI by other 3GPP protocol existing messages or newly defined messages.

And S604, the network equipment determines frequency domain components used for cooperative transmission according to the third information.

In this step, the network device determines, from the third information, the frequency domain component selected by the terminal device for each TRP in the TRP cooperation set. The frequency domain components of the respective TRPs constitute frequency domain components used for cooperative transmission.

In one possible implementation, the frequency domain components indicated by the third information are all frequency domain components selected by the terminal device. In this case, the network device determines that the frequency domain component used for cooperative transmission is the frequency domain component indicated by the third information.

For example, k=3, n=4, m2=2, trp ₁ The corresponding candidate frequency domain components are f respectively ₁₁ 、f ₁₂ 、f ₁₃ And f ₁₄ ，TRP ₂ The corresponding candidate frequency domain components are f respectively ₂₁ 、f ₂₂ 、f ₂₃ And f ₂₄ ，TRP ₃ The corresponding candidate frequency domain components are f respectively ₃₁ 、f ₃₂ 、f ₃₃ And f ₃₄ . Assume that the terminal device is directed to TRP ₁ Select 2 frequency domain components f ₁₁ And f ₁₄ For TRP ₂ Select 2 frequency domain components f ₂₂ And f ₂₃ For TRP ₃ Selection of2 frequency domain components f ₃₃ And f ₃₄ The network device determines that the frequency domain components for cooperative transmission are: TRP (TRP) ₁ Using the frequency domain component f ₁₁ And f ₁₄ Transmitting downlink data, TRP ₂ Using f ₂₂ And f ₂₃ Transmitting downlink data, TRP ₃ Using the frequency domain component f ₃₃ And f ₃₄ And sending downlink data.

In another possible implementation, the protocol presets or the network device configures the terminal device to default to select one or more specific frequency domain components, e.g., the terminal device defaults to an initial frequency domain component and/or a terminating frequency domain component of the plurality of candidate frequency domain components. In this case, the frequency domain component indicated by the third information may be a frequency domain component selected by the terminal device other than the initial frequency domain component and/or the termination frequency domain component selected by the terminal device by default. Thus, the frequency domain component used by the cooperative transmission determined by the network device may be the frequency domain component indicated by the third information, and the initial frequency domain component and/or the termination frequency domain component selected by default by the terminal device. For example, k=3, n=4, m2=2, trp ₁ The corresponding candidate frequency domain components are f respectively ₁₁ 、f ₁₂ 、f ₁₃ And f ₁₄ ，TRP ₂ The corresponding candidate frequency domain components are f respectively ₂₁ 、f ₂₂ 、f ₂₃ And f ₂₄ ，TRP ₃ The corresponding candidate frequency domain components are f respectively ₃₁ 、f ₃₂ 、f ₃₃ And f ₃₄ . Let f ₁₁ 、f ₂₁ 、f ₃₁ And f ₄₁ Frequency domain components selected by default for the terminal device, then the terminal device targets the TRP ₁ 1 frequency domain component f is selected ₁₄ For TRP ₂ 1 frequency domain component f is selected ₂₃ For TRP ₃ 1 frequency domain component f is selected ₃₄ The network device determines that the frequency domain components for cooperative transmission are: TRP (TRP) ₁ Using the frequency domain component f ₁₁ And f ₁₄ Transmitting downlink data, TRP ₂ Using f ₂₁ And f ₂₃ Transmitting downlink data, TRP ₃ Using the frequency domain component f ₃₁ And f ₃₄ And sending downlink data.

Optionally, the network device performs downlink precoding according to the determined frequency domain component. For example, for any one of the TRP in the TRP cooperation set, the network device generates a precoding matrix for the TRP according to the determined frequency domain component and transmits the precoding matrix to the TRP. The TRP uses the determined precoding matrix to perform precoding processing on downlink data and then sends the downlink data to the terminal equipment.

In the embodiment of the application, the terminal equipment reports the selected frequency domain components in a mode of frequency domain component joint indication, so that the air interface overhead is effectively reduced, and the terminal equipment reports the frequency domain components in the TRP cooperation scene more effectively.

The above embodiments describe a method for reporting frequency domain components by a terminal device in a scenario of multi-TRP cooperation when the number of frequency domain components used by each TRP is the same. In an actual system, each TRP may also use the same number of spatial components, e.g., each TRP may use the same number of beams to transmit downlink data. For this reason, the embodiment of the application also provides a method for reporting the spatial component by the terminal equipment. Similar to the method for reporting the frequency domain component by the terminal equipment, the method for reporting the spatial domain component by the terminal equipment in the embodiment of the application also achieves the effect of saving air interface overhead.

Fig. 7 is a flow chart illustrating a method for reporting spatial components according to an embodiment of the present application. The method 700 is applied to interactions between a network device and a terminal device. In this embodiment, the network device may be one TRP in the TRP coordination set of the terminal device, or may be a device outside the TRP coordination set and having the capability of controlling each TRP in the TRP coordination set, which is not limited in this application. The network device may communicate with any one of the TRP's in the collaborative set of TRPs. The flow shown in fig. 7 includes the following steps:

S701, the terminal device acquires the TRP number, the sixth information, and the seventh information.

The number of TRPs is used to indicate the number of cooperative TRPs.

The sixth information is used to indicate the number of spatial components. It should be understood that the number of spatial components is the number of spatial components corresponding to one TRP. In the embodiment of the application, each TRP in the TRP collaborative set corresponds to the same number of spatial components. The number of spatial components is the number of spatial components selected by the terminal device for one TRP. Illustratively, one TRP cooperation set contains 3 TRPs, and the number of spatial components is 2, which means that for each TRP of the 3 TRPs, the number of spatial components selected by the terminal device is 2.

It should be understood that, after the terminal device obtains the number of spatial components, it is required to select a spatial component corresponding to the number of spatial components from the plurality of candidate spatial components, and report the indication information of the selected spatial components to the network device.

The seventh information is used to indicate the number of candidate spatial components. It should be understood that the number of candidate spatial components is the number of candidate spatial components corresponding to one TRP. In the embodiment of the application, each TRP in the TRP collaborative set corresponds to the same number of candidate spatial components. The candidate airspace component set corresponding to the number of candidate airspace components is a candidate set of airspace components for one TRP selected by the terminal equipment, namely the terminal equipment selects airspace components corresponding to the number of airspace components from the candidate airspace component set. Illustratively, one TRP cooperation set contains 3 TRPs, the number of spatial components is 2, and the number of candidate spatial components is 8, which means that for each TRP of the 3 TRPs, the terminal device selects 2 spatial components from the 8 candidate spatial components.

Optionally, the seventh information indicates a reference signal port number, such as a CSI-RS port number.

In this step, the manner in which the terminal device acquires the number of TRPs is similar to the manner in which the terminal device acquires the number of TRPs described in the foregoing embodiment S601, the manner in which the terminal device acquires the sixth information is similar to the manner in which the terminal device acquires the first information described in the foregoing embodiment S601, and the manner in which the terminal device acquires the seventh information is similar to the manner in which the terminal device acquires the second information described in the foregoing embodiment S601, and will not be described again.

S702, the terminal equipment generates eighth information, wherein the eighth information is used for indicating the spatial components selected by the terminal equipment.

Wherein the eighth information is occupiedA number of bits; />Representing an upward rounding function; y is used for indicating the number of combinations of spatial components, and Y is an integer greater than or equal to 1.

The number of spatial component combinations is the number of spatial component combinations corresponding to the spatial component selected by the terminal device. It should be understood that the number of spatial component combinations is the number of spatial component combinations corresponding to one TRP in the TRP cooperation set. Assuming that for one TRP, the number of candidate spatial components is T, the number of spatial components is S, and the number of spatial component combinations is Y, wherein T is an integer greater than 1, S is a positive integer, and S is equal to or greater than 1 and equal to or less than T. It should be understood that, in the case where there is a default selected airspace component, the airspace component combination number is the airspace component combination number corresponding to the airspace component selected by the terminal device other than the default selected airspace component. The spatial components that the terminal device needs to report are also selected in addition to the default selected spatial components.

By way of example only, and in an illustrative,this means that the number of spatial component combinations determined by the terminal device is a number of combinations formed by arbitrarily selecting S spatial components from T candidate spatial components as one combination. In this manner, the terminal device determines the number of combinations of S spatial components selected from the T candidate spatial components that it needs to instruct to the network device.

S703, the terminal device sends eighth information to the network device. Accordingly, the network device receives eighth information from the terminal device.

Optionally, the eighth information is included in PMI information, where the PMI information may be carried by UCI, where UCI may be used for the terminal device to feed back CSI of the downlink channel.

Optionally, the eighth information is sent to the network device as part of the information in the downlink channel CSI by other 3GPP protocol existing messages or newly defined messages.

And S704, the network equipment determines spatial components used for cooperative transmission according to the eighth information.

In this step, the network device determines, from the eighth information, spatial components selected by the terminal device for each TRP in the TRP cooperation set. The spatial components of the various TRPs constitute the spatial frequency emissions used for cooperative transmission.

Optionally, the network device performs downlink precoding according to the determined spatial component. For example, for any one TRP in the TRP cooperation set, the network device generates a precoding matrix for the TRP according to the determined spatial component and sends the precoding matrix to the TRP. The TRP uses the determined precoding matrix to perform precoding processing on downlink data and then sends the downlink data to the terminal equipment.

In the scheme of the embodiment of the application, the terminal equipment reports the selected airspace component in a airspace component joint indication mode, so that the air interface overhead is effectively reduced, and the terminal equipment reports the airspace component in the TRP cooperation scene more effectively.

It should be noted that, the method for reporting the frequency domain component by the terminal device and the method for reporting the airspace component by the terminal device may be implemented independently, that is, the terminal device only reports the frequency domain component, or the terminal device only reports the airspace component; or may be implemented jointly, i.e. the terminal device reports both frequency domain components and spatial domain components. In the case of joint implementation, the first information and the sixth information may be respectively carried in different signaling messages, or may be carried in the same signaling message; the second information and the seventh information may be respectively carried in different signaling messages, or may be carried in the same signaling message; the third information and the eighth information may be carried in different signaling messages, or may be carried in the same signaling message.

The above description has been presented mainly from the point of interaction between each network element. It will be understood that each network element, such as a network device and a terminal device, in order to implement the above-described functions, comprises a corresponding hardware structure or software module, or a combination of both, that performs each function. Those of skill in the art will readily appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the present application may divide the functional modules of the network device and the terminal device according to the above method example, for example, each functional module/unit may be divided corresponding to each function, or two or more functions may be integrated in one processing module/unit. The integrated modules/units described above may be implemented either in hardware or in software functional modules. It should be noted that the division of the modules/units in the embodiments of the present application is merely a logic function division, and other division manners may be implemented in practice. The following description will take as an example the division of each functional module/unit into corresponding functions:

fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application. The terminal device 800 may correspond to the terminal device in the above method embodiment, for example, may be a terminal device, or a component (such as a circuit, a chip, or a chip system) configured in the terminal device, and the terminal device 800 may include a module/unit for performing the method performed by the terminal device in the method 600 in fig. 6, and/or a module/unit for performing the method performed by the terminal device in the method 700 in fig. 7. And, each module/unit in the terminal device 800 is respectively configured to implement the corresponding flow of the method 600 in fig. 6 and/or implement the corresponding flow of the method 700 in fig. 7.

As shown in fig. 8, the terminal device 800 includes a communication unit 801 and a processing unit 802. Wherein the communication unit 801 is configured to support the terminal device to perform S603 in fig. 6, and/or S703 in fig. 7, and/or to support other procedures of the technical solution described herein. The processing unit 802 is configured to support the terminal device to perform S602 in fig. 6, and/or S702 in fig. 7, and/or to support other processes of the technical solution described herein. S601 in fig. 6 and/or S701 in fig. 7 may be supported by the communication unit 801 and/or the processing unit 802. 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 communication unit 801 in the terminal device 800 may be implemented by a transceiver, e.g. may correspond to the transceiver 103 in the terminal device 100 shown in fig. 2, and the processing unit 702 in the terminal device 700 may be implemented by at least one processor, e.g. may correspond to the processor 101 in the terminal device 100 shown in fig. 2.

It should also be understood that when the terminal device is a chip or a chip system configured in the terminal device, the communication unit 801 in the terminal device may be implemented by an input/output interface, a circuit, etc., and the processing unit 802 in the terminal device may be implemented by a processor, a microprocessor, an integrated circuit, etc. integrated on the chip or the chip system.

Fig. 9 is a schematic structural diagram of a network device according to an embodiment of the present application. The network device 900 may correspond to the network device in the above method embodiment, for example, may be a network device, or a component (such as a circuit, a chip, or a chip system) configured in a network device, where the network device 900 may include a module/unit for performing the method performed by the network device in the method 600 in fig. 6, and/or a module/unit for performing the method performed by the network device in the method 700 in fig. 7. And, each module/unit in the network device 900 is configured to implement a corresponding flow of the method 600 in fig. 6 and/or implement a corresponding flow of the method 700 in fig. 7, respectively.

As shown in fig. 9, the network device 900 includes a communication unit 901 and a processing unit 902. Wherein the communication unit 901 is configured to support the network device to perform S603 in fig. 6, and/or S703 in fig. 7, and/or to support other procedures of the technical solution described herein. The processing unit 902 is configured to support the network device to perform S604 in fig. 6, and/or S704 in fig. 7, and/or to support other processes of the technical solutions described herein. Optionally, S601 in fig. 6 and/or S701 in fig. 7 are supported by the communication unit 901. 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 communication unit 901 in the network device 900 may be implemented by a transceiver, e.g. may correspond to the transceiver 203 in the network device 200 shown in fig. 2, and the processing unit 902 in the network device 900 may be implemented by at least one processor, e.g. may correspond to the processor 201 in the network device 200 shown in fig. 2.

It should also be understood that when the network device is a chip or a chip system configured in the network device, the communication unit 901 in the network device may be implemented by an input/output interface, a circuit, or the like, and the processing unit 902 in the network device may be implemented by a processor, a microprocessor, an integrated circuit, or the like integrated on the chip or the chip system.

The embodiment of the application also provides a processing device which comprises a processor and a communication interface. The communication interface is coupled with the processor. The communication interface is used for inputting and/or outputting information. The information includes at least one of instructions and data. The processor is configured to execute the computer program, so that the processing apparatus executes the method executed by the terminal device or the network device in the above method embodiment.

The embodiment of the application also provides a processing device, which comprises a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program from the memory, so that the processing device executes the method executed by the terminal device or the network device in the method embodiment.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method. To avoid repetition, a detailed description is not provided herein.

Fig. 10 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip shown in fig. 10 may be a general-purpose processor or a special-purpose processor. The chip includes a processor 1001. The processor 1001 is configured to support the terminal device and the network device to execute the technical solutions shown in fig. 6 and fig. 7.

Optionally, the chip further includes a transceiver pin 1002, where the transceiver pin 1002 is configured to be controlled by the processor 1001 and is configured to support the communication device to perform the technical solutions shown in fig. 6 and fig. 7.

Optionally, the chip shown in fig. 10 may further include: a storage medium 1003.

It should be noted that the chip shown in fig. 10 may be implemented using the following circuits or devices: one or more FPGAs, programmable logic devices (programmable logic device, PLDs), system on chip (SoC) chips, controllers, state machines, logic circuits, discrete hardware components, any other suitable circuit, or any combination of circuits capable of performing the various functions described throughout this application.

The terminal device, the network device, the computer storage medium, the computer program product, and the chip provided in the embodiments of the present application are all configured to execute the method provided above, so that the beneficial effects that can be achieved by the method provided above can refer to the beneficial effects corresponding to the method provided above, and are not described herein again.

Embodiments of the present application also provide a computer-readable storage medium having computer instructions stored therein; the computer readable storage medium, when executed on a communication device, causes the communication device to perform the method as shown in fig. 4. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (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 including one or more servers, data centers, etc. that can be integrated with the medium. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium, or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

The present application also provides a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method performed by the terminal device or the method performed by the network device in the embodiment shown in fig. 4.

The embodiment of the application also provides a system which comprises the one or more terminal devices and one or more network devices.

The network device in the above-mentioned respective apparatus embodiments corresponds entirely to the network device or the terminal device in the terminal device and method embodiments, the respective steps are performed by respective modules/units, for example, the steps of receiving or transmitting in the method embodiments are performed by the communication unit (transceiver), and other steps than transmitting and receiving may be performed by the processing unit (processor). Reference may be made to corresponding method embodiments for the function of a specific unit. Wherein the processor may be one or more.

The terms "component," "unit," "module," "system," and the like are used in this specification to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components may reside within a process and/or thread of execution and a component may be localized on one computer and/or distributed between 2 or more computers. Furthermore, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with one another in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. 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. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

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. The method for reporting the frequency domain component is characterized by comprising the following steps:

the method comprises the steps that terminal equipment obtains the number of Transmission and Reception Points (TRPs), first information and second information, wherein the number of TRPs is used for indicating the number of cooperative TRPs, the first information is used for indicating the number of frequency domain components, and the second information is used for indicating the number of candidate frequency domain components;

the terminal equipment generates third information, wherein the third information is used for indicating the frequency domain component selected by the terminal equipment, and the third information occupiesThe frequency domain component combination number is obtained according to the first information and the second information, and X is an integer greater than or equal to 1; k is used for indicating the number of TRPs, and K is an integer greater than 1;

and the terminal equipment sends the third information to network equipment.

2. The method of claim 1, wherein the terminal device obtains the number of TRPs, comprising:

the terminal equipment receives fourth information from the network equipment, wherein the fourth information is used for indicating K reference signal resources or K antenna port groups, and the K reference signal resources or the K antenna port groups are in one-to-one correspondence with K cooperative TRPs.

3. The method of claim 1, wherein the terminal device obtains the number of TRPs, comprising:

the terminal equipment receives fifth information from the network equipment, wherein the fifth information is used for indicating K ^′ Reference signal resource or K ^′ Antenna port group, K ^′ Is an integer greater than 1, said K ^′ Reference signal resources or the K ^′ Antenna port group and K ^′ One-to-one correspondence of the TRPs;

the terminal equipment is according to K ^′ Determining K of said cooperative TRPs by using said TRPs, wherein K.ltoreq.K ^′ 。

4. A method according to any one of claims 1 to 3, wherein the terminal obtaining the first information and the second information comprises: the terminal device receives the first information and the second information from the network device.

5. The method according to any one of claim 1 to 4, wherein, Or->Wherein the first information is used for indicating N, and the second information is used for indicating M.

6. The method of claim 5, wherein n=4 and m=2.

7. The method according to any one of claim 1 to 4, wherein,

in the case where N3 is less than or equal to 19,or,

in the case where N3 > 19 is used,

wherein the first information is used for indicating M, and the second information is used for indicating N3.

8. The method according to any of claims 1 to 7, characterized in that the third information is contained in precoding matrix indicator, PMI, information carried in uplink control information, UCI.

9. The method according to any of claims 1 to 8, wherein at least one of the first information, second information, fourth information and fifth information is carried in at least one of the following signaling: radio resource management, RRC, signaling, medium access control, control element, MAC-CE, signaling and downlink control information, DCI.

10. The method for reporting the frequency domain component is characterized by comprising the following steps:

the network equipment receives third information from the terminal equipment, wherein the third information is used for indicating the frequency domain component selected by the terminal equipment, and the third information occupies A number of bits, wherein X is an integer greater than or equal to 1, for indicating a frequency domain component combination number; k is used for indicating the number of cooperative TRPs, and K is an integer greater than 1;

the network device determines frequency domain components used for cooperative transmission according to the third information.

11. The method according to claim 10, wherein the method further comprises:

the network device sends fourth information to the terminal device, where the fourth information is used to indicate K reference signal resources or K antenna port groups, and the K reference signal resources or the K antenna port groups are in one-to-one correspondence with K cooperative TRPs.

12. The method according to claim 10, wherein the method further comprises:

the network device sends fifth information to the terminal device, wherein the fifth information is used for indicating K ^′ Reference signal resource or K ^′ Antenna port group, K ^′ Is an integer greater than 1, said K ^′ Reference signal resources or the K ^′ Antenna port group and K ^′ One-to-one correspondence of the TRPs;

the K is ^′ The TRP is used for determining K cooperative TRPs, wherein K is less than or equal to K ^′ 。

13. The method according to any one of claims 10 to 12, further comprising:

The network device sends first information and second information to the terminal device, wherein the first information is used for indicating the number of frequency domain components, the second information is used for indicating the number of candidate frequency domain components, and the frequency domain component combination number is obtained according to the first information and the second information.

14. The method of claim 13, wherein the step of determining the position of the probe is performed,or->Wherein the first information is used for indicating N, and the second information is used for indicating M.

15. The method of claim 14, wherein n=4 and m=2.

16. The method of claim 13, wherein the step of determining the position of the probe is performed,

in the case where N3 is less than or equal to 19,or,

in the case where N3 > 19 is used,

17. The method according to any of the claims 10 to 16, characterized in that the third information is contained in precoding matrix indicator, PMI, information carried in uplink control information, UCI.

18. The method according to any of claims 10 to 17, wherein at least one of the first information, second information, fourth information and fifth information is carried in at least one of the following signaling: radio resource management, RRC, signaling, medium access control, control element, MAC-CE, signaling and downlink control information, DCI.

19. A communication device, comprising:

a processing unit, configured to obtain a number of transmission and reception points TRP, first information and second information, where the number of TRPs is used to indicate a number of cooperative TRPs, the first information is used to indicate a number of frequency domain components, and the second information is used to indicate a number of candidate frequency domain components;

the processing unit is further configured to generate third information, where the third information is used to indicate a frequency domain component selected by the terminal device, and the third information occupiesThe frequency domain component combination number is obtained according to the first information and the second information, and X is an integer greater than or equal to 1; k is used for indicating the number of TRPs, and K is an integer greater than 1;

and the communication unit is used for sending the third information to the network equipment.

20. The communication device of claim 19, wherein the communication device is configured to,

the communication unit is further configured to receive fourth information from the network device, where the fourth information is used to indicate K reference signal resources or K antenna port groups, and the K reference signal resources or the K antenna port groups are in one-to-one correspondence with K cooperative TRPs.

21. The communication device of claim 19, wherein the communication device is configured to,

the communication unit is further configured to receive fifth information from the network device, where the fifth information is used to indicate K ^′ Reference signal resource or K ^′ Antenna port group, K ^′ Is an integer greater than 1, said K ^′ Reference signal resources or the K ^′ Antenna port group and K ^′ One-to-one correspondence of the TRPs;

the processing unit is also used for processing the data according to K ^′ Determining K of said cooperative TRPs by using said TRPs, wherein K.ltoreq.K ^′ 。

22. The communication device according to any one of claims 19 to 21, wherein,

the communication unit is further configured to receive the first information and the second information from the network device.

23. The communication device according to any one of claims 19 to 22, wherein,or->Wherein the first information is used for indicating N, and the second information is used for indicating M.

24. The communication device of claim 23, wherein n=4 and m=2.

25. The communication device according to any one of claims 19 to 22, wherein,

in the case where N3 is less than or equal to 19,or,

in the case where N3 > 19 is used,

26. The communication apparatus according to any one of claims 19 to 25, wherein the third information is contained in precoding matrix indicator, PMI, information carried in uplink control information, UCI.

27. The communication apparatus according to any of claims 19 to 26, wherein at least one of the first information, second information, fourth information and fifth information is carried in at least one of the following signaling: radio resource management, RRC, signaling, medium access control, control element, MAC-CE, signaling and downlink control information, DCI.

28. A communication device, comprising:

a communication unit, configured to receive third information from a terminal device, where the third information is used to indicate a frequency domain component selected by the terminal device, and the third information occupiesA number of bits, wherein X is an integer greater than or equal to 1, for indicating a frequency domain component combination number; k is used for indicating the number of cooperative TRPs, and K is an integer greater than 1;

and the processing unit is used for determining frequency domain components used for cooperative transmission according to the third information.

29. The communication device of claim 28, wherein the communication device is configured to,

the communication unit is further configured to send fourth information to the terminal device, where the fourth information is used to indicate K reference signal resources or K antenna port groups, and the K reference signal resources or the K antenna port groups are in one-to-one correspondence with the K cooperative TRPs.

30. The communication device of claim 28, wherein the communication device is configured to,

the communication unit is further configured to send fifth information to the terminal device, where the fifth information is used to indicate K ^′ Reference signal resource or K ^′ Antenna port group, K ^′ Is an integer greater than 1, said K ^′ Reference signal resources or the K ^′ Antenna port group and K ^′ One-to-one correspondence of the TRPs;

31. The communication device according to any one of claims 28 to 30, wherein,

the communication unit is further configured to send first information and second information to the terminal device, where the first information is used to indicate the number of frequency domain components, the second information is used to indicate the number of candidate frequency domain components, and the number of frequency domain component combinations is obtained according to the first information and the second information.

32. The communication device of claim 31, wherein the communication device is configured to,or->Wherein the first information is used for indicating N, and the second information is used for indicating M.

33. The communication device of claim 32, wherein n=4 and m=2.

34. The communication device of claim 31, wherein the communication device is configured to,

In the case where N3 is less than or equal to 19The lower part of the upper part is provided with a lower part,or,

in the case where N3 > 19 is used,

35. The communication apparatus according to any one of claims 28 to 34, wherein the third information is contained in precoding matrix indicator, PMI, information carried in uplink control information, UCI.

36. The communication apparatus according to any of claims 28 to 35, wherein at least one of the first information, second information, fourth information and fifth information is carried in at least one of the following signaling: radio resource management, RRC, signaling, medium access control, control element, MAC-CE, signaling and downlink control information, DCI.

37. A communication device, comprising: at least one processor and interface circuitry;

the interface circuit is used for communicating with a module outside the communication device;

the at least one processor is configured to execute a computer program or instructions to cause the communication device to perform the method of any one of claims 1 to 18.

38. A communication device, comprising: at least one processor and memory;

The memory is used for storing a computer program or instructions;

the at least one processor configured to execute the computer program or instructions to cause the method of any one of claims 1 to 18 to be performed.

39. A chip system, the chip system comprising: a processing circuit; the processing circuit is coupled with a storage medium;

the processing circuitry being adapted to execute part or all of the computer program or instructions in the storage medium, which when executed, is adapted to carry out the method of any one of claims 1 to 18.

40. A computer readable storage medium storing instructions which, when executed by a computer, cause the method of any one of claims 1 to 18 to be performed.

41. A computer program product comprising a computer program or instructions which, when run on a computer, causes the method of any one of the preceding claims 1 to 18 to be performed.