Communication method and apparatus, and terminal device and network device

Abstract

Provided in the embodiments of the present application are a communication method and apparatus, and a terminal device and a network device. The method comprises: on N reference signal resources from among K reference signal resources configured by a network device, measuring a reference signal sent by the network device, so as to obtain precoding information corresponding to M reference signal resources from among the K reference signal resources, wherein one or more of the M reference signal resources is / are not included in the N reference signal resources, K being an integer greater than 1, N and M both being integers greater than 0, and N being less than K.

Description

Communication method and device, terminal equipment, and network equipment Technical Field

[0001] The embodiments of the present application relate to the field of mobile communication technology, and specifically to a communication method and apparatus, terminal equipment, and network equipment. Background Art

[0002] In the 5G communication system, the channel state information (CSI) feedback corresponding to the multi-transmit reception point (TRP) transmission scheme can be supported. This CSI feedback is based on a specific codebook, and the network device can perform downlink multi-TRP transmission based on the CSI feedback from the terminal device. For example, the CSI feedback corresponding to the non-coherent joint transmission (NC-JT) of multiple TRPs can be supported, as well as the CSI feedback corresponding to the coherent joint transmission (CJT) of multiple TRPs can be supported.

[0003] However, in existing CSI feedback schemes corresponding to multiple TRP transmissions, each TRP requires independent reference signal resources for CSI measurement. As the number of TRPs increases, or as the number of ports supported by each TRP increases, the actual reference signal resources used also increase linearly. Furthermore, terminal devices need to perform CSI measurements and calculations on the reference signals on these reference signal resources, significantly increasing computational complexity.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a communication method and apparatus, a terminal device, and a network device.

[0006] In a first aspect, the communication method provided by the embodiments of the present application includes:

[0007] Measuring, on N reference signal resources among the K reference signal resources configured by the network device, a reference signal sent by the network device to obtain precoding information corresponding to M reference signal resources among the K reference signal resources;

[0008] One or more reference signal resources among the M reference signal resources are not included in the N reference signal resources, K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K.

[0009] In a second aspect, the communication method provided by the embodiments of the present application includes:

[0010] Sending a reference signal to the terminal device on N reference signal resources among the K reference signal resources configured for the terminal device;

[0011] Receiving precoding information corresponding to M reference signal resources among K reference signal resources sent by a terminal device;

[0012] One or more reference signal resources among the M reference signal resources are not included in the N reference signal resources, K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K.

[0013] In a third aspect, an embodiment of the present application provides a communication device, which is applied to a terminal device and includes:

[0014] A first processing unit is configured to measure, on N reference signal resources among the K reference signal resources configured by the network device, a reference signal sent by the network device, and obtain precoding information corresponding to M reference signal resources among the K reference signal resources;

[0015] One or more reference signal resources among the M reference signal resources are not included in the N reference signal resources, K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K.

[0016] In a fourth aspect, an embodiment of the present application provides a communication device, which is applied to a network device and includes:

[0017] A second sending unit is configured to send a reference signal to the terminal device on N reference signal resources among the K reference signal resources configured for the terminal device;

[0018] A second receiving unit is configured to receive precoding information corresponding to M reference signal resources among the K reference signal resources sent by the terminal device;

[0019] One or more reference signal resources among the M reference signal resources are not included in the N reference signal resources, K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K.

[0020] In a fifth aspect, an embodiment of the present application provides a terminal device, the terminal device including a processor and a memory. The memory is used to store computer-executable instructions, and the processor is connected to the memory and is used to implement the communication method of the first aspect by executing the computer-executable instructions.

[0021] In a sixth aspect, an embodiment of the present application provides a network device, comprising a processor and a memory. The memory is configured to store computer-executable instructions, and the processor is connected to the memory and configured to implement the communication method of the second aspect by executing the computer-executable instructions.

[0022] In the seventh aspect, the chip provided in the embodiment of the present application is used to implement the communication method of the first aspect or the second aspect mentioned above.

[0023] Specifically, the chip includes: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes the communication method of the first aspect or the second aspect mentioned above.

[0024] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by at least one processor, implements the communication method of the first aspect or the second aspect mentioned above.

[0025] In the ninth aspect, an embodiment of the present application provides a computer program product, which includes a computer storage medium, which stores a computer program, and the computer program includes instructions that can be executed by at least one processor. When the instructions are executed by at least one processor, the communication method of the first aspect or the second aspect mentioned above is implemented.

[0026] In the tenth aspect, the computer program provided in the embodiment of the present application, when running on a computer, enables the computer to execute the communication method of the first aspect or the second aspect mentioned above.

[0027] An embodiment of the present application provides a communication method in which a terminal device can measure reference signals sent by a network device on N of K reference signal resources configured by the network device, and obtain precoding information corresponding to M of the K reference signal resources; wherein one or more of the M reference signal resources are not included in the N reference signal resources, and K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K. In this way, the terminal device can obtain precoding information corresponding to the M reference signal resources by measuring reference signals on the N reference signal resources, thereby reducing the number of reference signal resources actually used by the terminal device and improving the transmission rate, and reducing the computational complexity of measuring reference signals on the reference signal resources actually used by the terminal device, thereby reducing the power consumption of the terminal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0029] FIG1 is a schematic diagram of a communication architecture;

[0030] FIG2 is a schematic diagram of a scenario of downlink coherent transmission of multiple TRPs;

[0031] FIG3A is a schematic diagram of a scenario 1 of downlink non-coherent transmission of multiple PDCCHs;

[0032] FIG3B is a second schematic diagram of a scenario of downlink non-coherent transmission of multiple PDCCHs;

[0033] FIG4 is a schematic diagram of a scenario of downlink non-coherent transmission of a single PDCCH;

[0034] Figure 5 is a schematic diagram of a neuron structure;

[0035] FIG6 is a schematic diagram of a neural network structure;

[0036] FIG7 is a schematic diagram of a neural network for CSI feedback;

[0037] FIG8 is a flow chart of a communication method provided in an embodiment of the present application;

[0038] FIG9 is a schematic diagram of the structure of a communication device 900 provided in an embodiment of the present application;

[0039] FIG10 is a schematic diagram of the structure of a communication device 1000 provided in an embodiment of the present application;

[0040] FIG11 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0041] FIG12 is a schematic structural diagram of a chip provided in an embodiment of the present application;

[0042] FIG13 is a schematic block diagram of a communication system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0044] FIG1 is a schematic diagram of an application scenario of an embodiment of the present application.

[0045] As shown in Figure 1, a communication system 100 may include a terminal device 110 and a network device 120. The network device 120 may communicate with the terminal device 110 via an air interface. The terminal device 110 and the network device 120 support multi-service transmission.

[0046] It should be understood that the embodiments of the present application are only illustrative of the communication system 100, but the embodiments of the present application are not limited thereto. That is, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Internet of Things (IoT) system, Narrow Band Internet of Things (NB-IoT) system, enhanced Machine-Type Communications (eMTC) system, 5G communication system (also known as New Radio (NR) communication system), or future communication systems.

[0047] In the communication system 100 shown in Figure 1, the network device 120 may be an access network device that communicates with the terminal device 110. The access network device may provide communication coverage for a specific geographical area and may communicate with the terminal device 110 located in the coverage area.

[0048] The network device 120 may be an evolved Node B (eNB or eNodeB) in an LTE system, or a Next Generation Radio Access Network (NG RAN) device, or a base station (gNB) in an NR system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the network device 120 may be a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved Public Land Mobile Network (PLMN), etc.

[0049] The terminal device 110 may be any terminal device, including but not limited to a terminal device connected to the network device 120 or other terminal devices by wire or wireless connection.

[0050] For example, the terminal device 110 may refer to an access terminal, user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handheld terminal, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolution network, etc.

[0051] The terminal device 110 can be used for device-to-device (D2D) communication.

[0052] FIG1 exemplarily shows a network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited in this embodiment of the present application.

[0053] It should be noted that FIG1 is only an example of a system to which this application is applicable. Of course, the method shown in the embodiment of this application can also be applied to other systems. In addition, the terms "system" and "network" are often used interchangeably in this article.

[0054] It should be understood that the term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0055] It should also be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0056] It should also be understood that the "correspondence" mentioned in the embodiments of the present application may indicate a direct or indirect correspondence between the two, or an association between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0057] It should also be understood that the “predefined” or “predefined rules” mentioned in the embodiments of the present application can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices), and the present application does not limit its specific implementation method. For example, predefined can refer to what is defined in the protocol. It should also be understood that in the embodiments of the present application, the “protocol” may refer to a standard protocol in the field of communications, for example, it may include LTE protocols, NR protocols, and related protocols used in future communication systems, and the present application does not limit this.

[0058] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0059] Downlink CJT based on multiple Transmission Relays (TRPs) has been introduced in NR communication systems. Downlink CJT is generally based on an ideal backhaul link. Multiple TRPs use different beams and / or precoding matrices to send the same data on the same physical resources. By adjusting the precoding matrix, the data sent by different TRPs is coherently superimposed on the terminal device side, thereby improving data transmission performance.

[0060] In order to enable the coherent superposition of data sent by different TRPs on the terminal device side, the terminal device needs to feedback the CSI of different TRPs based on the CJT assumption.

[0061] It should be noted that the terminal device can feedback a rank indicator (RI), one or more precoding matrix indicators (PMIs), and a channel quality indicator (CQI) in the CSI. Among them, the PMI can contain the precoding information of multiple TRPs. The terminal device can feedback the precoding information of multiple TRPs in one PMI or in multiple PMIs respectively, so that when the network device uses this precoding information for precoding, the effect of coherent transmission can be achieved.

[0062] It should be noted that CSI can be measured based on the Channel State Information-Reference Signal (CSI-RS) resources configured by the network device. The network device can be configured with multiple CSI-RS resources, each resource corresponding to a TRP. The terminal device performs CSI measurement based on the channel information obtained from multiple CSI-RS resources and the assumption of coherent transmission.

[0063] Furthermore, the terminal device can select one or more CSI-RS resources from multiple CSI-RS resources configured by the network device, and feedback the CSI corresponding to the one or more CSI-RS resources, thereby realizing the TRP selection function on the terminal device side and reducing feedback overhead.

[0064] Figure 2 is a schematic diagram of a scenario of downlink coherent transmission of multiple TRPs. As shown in Figure 2, it is assumed that there are two TRPs, denoted as TRP210 and TRP220, and TRP210 and TRP220 can cooperate with each other. TRP210 and TRP220 can use different beams and / or precoding matrices to send physical downlink control channels (Physical Downlink Shared Channel, PDSCH) to terminal device 230 on the same physical resources. By adjusting the precoding matrix, the PDSCHs sent by TRP210 and TRP220 are coherently superimposed on the terminal device 230 side; the terminal device 230 can feedback positive acknowledgment (ACK) / negative acknowledgment (NACK) and CSI to TRP210. Among them, the downlink control information (DCI) transmitted by TRP210 for scheduling PDSCH can be carried by the control resource set (CORESET).

[0065] Downlink NC-JT based on multiple TRPs is also introduced in the NR communication system. Among them, the backhaul connection between TRPs can be ideal or non-ideal. Under ideal backhaul, TRPs can exchange information quickly and dynamically. Under non-ideal backhaul, due to the large delay, TRPs can exchange information quasi-statically. Among them, multiple TRPs can use different control channels to independently schedule multiple PDSCH transmissions of a terminal device; multiple TRPs can also use the same control channel to schedule the transmission of different TRPs, where the data of different TRPs use different transport layers. The following describes two implementation methods of scheduling multiple TRPs using control channels.

[0066] In one possible implementation, for downlink transmissions scheduled by multiple physical downlink control channels (PDCCHs), the scheduled PDSCHs can be transmitted in the same time slot or in different time slots. The terminal device needs to support simultaneous reception of PDCCHs and PDSCHs from different TRPs.

[0067] It should be noted that the terminal device can feed back the ACK / NACK and CSI to different TRPs that transmit the corresponding PDSCH. This scenario is applicable to both ideal backhaul and non-ideal backhaul. The terminal device can also combine the ACK / NACK and CSI and feed them back to a single TRP. This scenario is applicable to ideal backhaul.

[0068] It should also be noted that the DCI for scheduling PDSCH transmitted by different TRPs can be carried by different CORESETs. In other words, the network device side can be configured with multiple CORESETs, and each TRP uses its own CORESET to carry DCI. In this case, the CORESET can be used to distinguish different TRPs. For example, the network device can configure a CORESET index for each CORESET, and different CORESET indices correspond to different TRPs.

[0069] It should also be noted that when the terminal device feeds back CSI, it needs to feed back the CSI corresponding to each TRP separately. The CSI may include RI, PMI, CQI, etc. Each TRP can use the CSI obtained to schedule downlink transmission.

[0070] Figure 3A is a schematic diagram of a scenario of downlink non-coherent transmission of multiple PDCCHs. As shown in Figure 3A, it is assumed that there are two TRPs, denoted as TRP310 and TRP320, and TRP310 and TRP320 can cooperate with each other. TRP310 can send PDCCH1 and PDSCH1 to the terminal device 330, and TRP320 can send PDCCH2 and PDSCH2 to the terminal device 330. The terminal device 330 can feed back ACK / NACK and CSI to different TRPs (i.e., TRP310 and TRP320) that transmit the corresponding PDSCH. Among them, the DCI transmitted by TRP310 for scheduling PDSCH1 can be carried by CORESET1, and the DCI transmitted by TRP320 for scheduling PDSCH2 can be carried by CORESET2.

[0071] Figure 3B is a schematic diagram of a scenario of downlink non-coherent transmission of multiple PDCCHs. As shown in Figure 3B, it is assumed that there are two TRPs, denoted as TRP340 and TRP350, and TRP340 and TRP350 can cooperate with each other. TRP340 can send PDCCH3 and PDSCH3 to terminal device 360, and TRP350 can send PDCCH4 and PDSCH4 to terminal device 360. Terminal device 360 ​​can combine ACK / NACK and CSI and feed them back to one TRP (i.e., TRP340). Among them, the DCI transmitted by TRP340 for scheduling PDSCH3 can be carried by CORESET3, and the DCI transmitted by TRP350 for scheduling PDSCH4 can be carried by CORESET4.

[0072] Another possible implementation method is that for downlink transmission scheduled by a single PDCCH, the same DCI can schedule multiple transmission layers from different TRPs. Among them, multiple transmission layers from different TRPs use demodulation reference signal (DMRS) ports in different command data module (CDM) groups and different transmission configuration indication (TCI) states. The network equipment needs to indicate the DMRS ports from different CDM groups and the TCI states corresponding to different CDM groups in one DCI, so as to support different DMRS ports to use different beams for transmission. In this case, HARQ-ACK feedback can reuse the mechanism in the existing protocol. This scenario is suitable for ideal backhaul situations.

[0073] It should be noted that the terminal device needs to report the RI and PMI corresponding to different TRPs in one CSI, as well as a joint CQI, which can be used to determine the modulation and coding scheme (MCS). The network device can configure the terminal device to report the CSI corresponding to multiple different transmission hypotheses, such as simultaneously reporting the CSI based on a single TRP transmission hypothesis and the CSI based on the NC-JT transmission hypothesis of multiple TRPs. In addition, the network device can also configure the terminal device to report the best performance of multiple different transmission hypotheses and the corresponding CSI, thereby saving feedback signaling overhead.

[0074] Figure 4 is a schematic diagram of a scenario of downlink non-coherent transmission of a single PDCCH. As shown in Figure 4, it is assumed that there are two TRPs, denoted as TRP410 and TRP420, and TRP410 and TRP420 can cooperate with each other. The DCI transmitted by TRP410 can be carried by CORESET, and the DCI can schedule both the transport layer from TRP410 (i.e., Layer 1) and the transport layer from TRP420 (i.e., Layer 2). The terminal device 430 can combine the ACK / NACK and CSI and feed them back to one TRP (i.e., TRP410).

[0075] Artificial Intelligence (AI) models are capable of handling a variety of tasks. They possess the ability to self-learn and adapt, dynamically adjusting and making decisions based on environmental changes. AI models can also be referred to as Machine Learning (ML) models; the two are equivalent or interchangeable.

[0076] In practical applications, AI models can be constructed using neural networks. A neural network is a computational model consisting of multiple interconnected neuron nodes. The connections between nodes represent weighted values ​​from input signals to output signals, called weights. Each node performs a weighted summation of different input signals and outputs the result through a specific activation function. Refer to the neuron structure diagram shown in Figure 5, where a1, a2, ..., an, and 1 are neuron inputs, w1, w2, ..., wn, and b represent weights, Sum represents the summation function, f represents the activation function, and t represents the output result.

[0077] A simple neural network, shown in Figure 6, consists of an input layer, hidden layers, and an output layer. By varying the connections, weights, and activation functions of multiple neurons, different outputs can be generated, thereby fitting the mapping from input to output. Each node in the previous level is connected to all of its next-level nodes. This fully connected model is also called a deep neural network (DNN).

[0078] An AI model can be trained and obtained through the process of dataset construction, training, verification, and testing. Training can be divided into offline and online training. Network devices can obtain static training results through offline training of datasets, which is referred to as offline training. As network devices or terminal devices use AI models, as terminal devices further measure and / or report, the network devices can continue to collect more data and conduct real-time online training to optimize the AI ​​model parameters and achieve better inference and prediction results. After obtaining the AI ​​model, the current information is input into the AI ​​model to infer the corresponding model output.

[0079] For example, when using an AI model for CSI feedback, the obtained channel information (such as eigenvectors, beam information, and delay information) can be used as input to the AI ​​model to infer the corresponding CSI quantization bits. On the network side, there will be a corresponding AI model that uses the CSI quantization bits as input to infer the corresponding channel information.

[0080] When AI models are used in wireless communications, they can be categorized as single-ended or dual-ended AI models. Single-ended AI models are deployed on one side of a terminal device or network device, allowing for immediate use and training on that side. Dual-ended AI models require pairing on both the terminal device and the network device, with both models trained together. This means the AI ​​models deployed on both sides correspond to each other and cannot be used or updated independently.

[0081] It should be noted that the AI ​​model used in the embodiment of the present application can be used for CSI feedback, and therefore the AI ​​model used in the embodiment of the present application is a typical two-end model.

[0082] For example, referring to a neural network diagram for CSI feedback shown in FIG7 , the neural network adopts a dual-end AI model structure. Among them, an AI model for encoding (Encoder) is deployed on the terminal device side, and a corresponding AI model for decoding (Decoder) is deployed on the network device side. The terminal device can embed the input channel information and use the embedded channel information as the input of the encoded AI model. The output of the encoded AI model needs to be quantized to obtain CSI quantization bits, typically such as PMI bits, and then fed back to the network device through an uplink channel (such as a physical uplink shared channel (PUSCH) / physical uplink control channel (PUCCH)). The network device uses the CSI quantization bits (such as PMI) fed back by the terminal as the input of the decoding AI model after dequantization, thereby outputting the channel information corresponding to the input on the terminal device side (such as the eigenvectors of each subband, etc., for downlink precoding), and outputs the channel information through a fiber channel (FC).

[0083] It should be noted that the terminal device can monitor the performance of the AI ​​model and report poor performance to the network device, allowing the network device to update the AI ​​model (for example, update the model structure or model parameters). Since the AI ​​models on both sides are matched, if the network device updates the AI ​​model, it needs to notify the terminal device via signaling, so that the terminal device can also update to the corresponding AI model.

[0084] It should also be noted that the above-mentioned AI model based on dual-end deployment can not only be used for CSI feedback, but also for other processing methods with corresponding operations / structures on the terminal device and network device side, such as channel coding-channel decoding, modulation-demodulation, pilot generation-channel estimation, transceiver RF signal processing, etc. It is only necessary to train a set of AI models on the corresponding terminal device side and network device side.

[0085] In related technologies, CSI feedback corresponding to codebook-based multi-TRP transmission schemes such as NC-JT and CJT can be supported. Among them, the CSI feedback for NC-JT is based on the NR eType1 codebook, and the CSI feedback for CJT is based on the NR eType2 codebook.

[0086] However, in the CSI feedback corresponding to the codebook-based multi-TRP transmission scheme, on the one hand, since each TRP requires independent CSI-RS resources, as the number of TRPs increases, or the number of ports supported by each TRP increases, the CSI-RS resources actually used will also increase linearly, thereby affecting the transmission rate; on the other hand, as the number of TRPs increases, or the number of ports supported by each TRP increases, since the terminal device needs to measure the CSI-RS on all CSI-RS resources configured on the network device, the corresponding calculation complexity will also increase, thereby increasing the power consumption of the terminal device.

[0087] Based on this, an embodiment of the present application provides a communication method, in which a terminal device can measure a reference signal sent by a network device on N of the K reference signal resources configured by the network device, and obtain precoding information corresponding to M of the K reference signal resources; wherein one or more of the M reference signal resources are not included in the N reference signal resources, and K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K. In this way, the terminal device can obtain precoding information corresponding to the M reference signal resources by measuring the reference signals on the N reference signal resources, thereby not only reducing the reference signal resources actually used by the terminal device and improving the transmission rate, but also reducing the computational complexity of the terminal device's measurement of the reference signal on the reference signal resources actually used, and reducing the power consumption of the terminal device.

[0088] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and all of them fall within the scope of protection of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0089] FIG8 shows a flow chart of a communication method provided in an embodiment of the present application. As shown in FIG8 , the method may include the following steps.

[0090] S810. The terminal device measures a reference signal sent by the network device on N reference signal resources among the K reference signal resources configured by the network device, and obtains precoding information corresponding to M reference signal resources among the K reference signal resources.

[0091] One or more reference signal resources among the M reference signal resources are not included in the N reference signal resources, K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K.

[0092] It should be noted that the network device can configure K reference signal resources for the terminal device.

[0093] Accordingly, the terminal device can receive K reference signal resources configured by the network device.

[0094] Furthermore, among the K reference signal resources configured by the network device, each reference signal resource corresponds to a collaborative TRP of the terminal device, that is, the K reference signal resources are reference signal resources configured by the network device for the collaborative K TRPs respectively.

[0095] Exemplarily, K reference signal resources may be configured in one reference signal resource set. For example, K reference signal resources may be configured in one CSI-RS resource set for CSI measurement.

[0096] Exemplarily, the reference signal resource may be a CSI-RS resource, a synchronization signal block (Synchronization Signal / PBCH Block, SSB) resource, an interference measurement resource (CSI Interference Measurement, CSI-IM) resource, etc., which is not limited in the embodiments of the present application.

[0097] It should be noted that the network device sending the reference signal to the terminal device can be understood as the network device sending the reference signal to the terminal device on N reference signal resources among the K reference signal resources configured for the terminal device.

[0098] Accordingly, the terminal device may receive the reference signal sent by the network device on N reference signal resources among the K reference signal resources.

[0099] Exemplarily, the reference signal may be CSI-RS, SSB, CSI-IM, etc., which is not limited in the embodiments of the present application.

[0100] It should be understood that, among the K TRPs corresponding to the K reference signal resources, N TRPs send reference signals to the terminal device on their respective reference signal resources, and the terminal device measures the reference signals on the N reference signal resources. The remaining KN TRPs may not send reference signals to the terminal device; alternatively, the remaining KN TRPs may also send reference signals to the terminal device on their respective reference signal resources, but the terminal device does not need to measure the reference signals, and the reference signal measurement can be performed on the side of other terminal devices.

[0101] It should be noted that one or more of the M reference signal resources are not included in the N reference signal resources. It can be understood that since the M reference signal resources are obtained by the terminal device based on the measurement and calculation of the reference signal, the M reference signal resources and the N reference signal resources can be two independent resource sets or two partially overlapping resource sets. In other words, the M reference signal resources and the N reference signal resources can be completely unrelated or include each other. The relationship between the M reference signal resources and the N reference signal resources depends on the results obtained by the terminal device from measuring and calculating the reference signal, and the network device may not impose any restrictions on this.

[0102] Therefore, one or more reference signal resources among the M reference signal resources are not included in the N reference signal resources, which may include the following two possible implementation manners.

[0103] In one possible implementation, the M reference signal resources include N reference signal resources, and M is greater than N.

[0104] For example, assuming that the value of K is 5, the value of M is 3, and the value of N is 2, then when the M reference signal resources are respectively recorded as reference signal resource 1, reference signal resource 2, and reference signal resource 3, the N reference signal resources can be reference signal resource 1 and reference signal resource 2. At this time, reference signal resource 3 among the M reference signal resources is not included in the N reference signal resources.

[0105] In traditional methods, when a terminal device measures reference signals on N reference signal resources, it can only obtain precoding information corresponding to the N reference signal resources. With this method, when a terminal device measures reference signals on N reference signal resources, it can obtain not only precoding information corresponding to the N reference signal resources, but also precoding information corresponding to reference signal resources other than the N reference signal resources. This reduces the number of reference signal resources actually used when the terminal device measures the reference signals, thereby increasing the transmission rate. This also reduces the computational complexity of the terminal device's reference signal measurements on the reference signal resources, thereby reducing the terminal device's power consumption.

[0106] In another possible implementation, the M reference signal resources do not completely include the N reference signal resources.

[0107] For example, assuming that the value of K is 5, the value of M is 3, and the value of N is 3, the M reference signal resources can be respectively recorded as reference signal resource 1, reference signal resource 2, and reference signal resource 3, and the N reference signal resources can be respectively recorded as reference signal resource 2, reference signal resource 3, and reference signal resource 4. At this time, reference signal resource 1 in the M reference signal resources is not included in the N reference signal resources, and reference signal resource 2 and reference signal resource 3 in the M reference signal resources are both included in the N reference signal resources.

[0108] Through this method, when a terminal device measures reference signals on N reference signal resources, it can obtain precoding information corresponding to reference signal resources other than the N reference signal resources. Thus, when the terminal device obtains precoding information by measuring reference signals, it can reduce the reference signal resources actually used by the terminal device, thereby increasing the transmission rate. It also reduces the computational complexity of measuring reference signals on the reference signal resources actually used by the terminal device, thereby reducing the power consumption of the terminal device.

[0109] In some embodiments, the number of CSI processing units (CPUs) occupied by the measurement is determined according to the values ​​of N and / or K.

[0110] Exemplarily, the number of CSI processing units occupied by the measurement is equal to N. That is, the number of CSI processing units is equal to the number of reference signal resources actually measured by the terminal device.

[0111] Exemplarily, the number of CSI processing units occupied by the measurement is equal to K. That is, the number of CSI processing units is equal to the total number of reference signal resources.

[0112] Exemplarily, the number of CSI processing units occupied by the measurement is equal to N + K. That is, the number of CSI processing units is equal to the sum of the number of reference signal resources actually measured by the terminal device and the total number of reference signal resources.

[0113] In some embodiments, the CSI processing delay required for measurement is determined according to the values ​​of N and / or K.

[0114] Exemplarily, the CSI processing delay required for measurement may be based on the first threshold plus an offset value calculated based on N and / or K.

[0115] It should be noted that the first threshold value may be a predefined parameter value or a parameter value set in other ways, which is not limited in the present embodiment. For example, the first threshold value may be a fixed value defined in the protocol.

[0116] In some embodiments, the method may further include: the network device sends first indication information to the terminal device, where the first indication information is used to indicate N reference signal resources from the K reference signal resources.

[0117] Correspondingly, the terminal device can receive the first indication information sent by the network device.

[0118] Through this method, after the terminal device receives the first indication information sent by the network device, it can subsequently measure the reference signal sent by the network device on the N reference signal resources indicated by the first indication information, thereby obtaining precoding information corresponding to the M reference signal resources.

[0119] The first indication information may be implemented in the following several possible ways to indicate N reference signal resources from K reference signal resources.

[0120] In a possible implementation, the first indication information indicates N reference signal resources from K reference signal resources through a first bitmap.

[0121] Exemplarily, the first indication information includes a K-bit bitmap, where each bit corresponds to one of the reference signal resources. When the bit value corresponding to a reference signal resource is 1, it indicates that the reference signal resource is included in the N reference signal resources; when the bit value corresponding to another reference signal resource is 0, it indicates that the other reference signal resource is not included in the N reference signal resources.

[0122] Through this method, the first indication information can indicate N reference signal resources from K reference signal resources in the form of a first bit map, so that the N reference signal resources can be subsequently determined through the first bit map, so as to measure the reference signal sent by the network device on the N reference signal resources and obtain the precoding information corresponding to the M reference signal resources.

[0123] In another possible implementation, the first indication information indicates sampling rates corresponding to the N reference signal resources in the K reference signal resources.

[0124] It should be noted that the sampling rate corresponding to the N reference signal resources in the K reference signal resources can be understood as the ratio between the N reference signal resources and the K reference signal resources.

[0125] It should also be noted that, based on the sampling rates corresponding to the N reference signal resources in the K reference signal resources, the terminal device can sample from the K reference signal resources in a predefined manner, thereby obtaining N reference signal resources.

[0126] Exemplarily, when the sampling rate corresponding to the N reference signal resources in the K reference signal resources is 1 / 2 or 2, it represents N=K / 2. At this time, the N reference signal resources are the 2kth (k>0, i.e., 2, 4, 6, 8, ...) or 2k+1th (k>=0, i.e., 1, 3, 5, 7, ...) reference signal resources among the K reference signal resources.

[0127] Exemplarily, when the sampling rate corresponding to the N reference signal resources in the K reference signal resources is 1 / 4 or 4, it represents N=K / 4. At this time, the N reference signal resources are the 4kth (k>0, i.e., 4, 8, 12, ...), 4k+1th (k>=0, i.e., 1, 5, 9, ...), 4k+2th (k>=0, i.e., 2, 6, 10, ...) or 4k+3th (k>=0, i.e., 3, 7, 11, ...) reference signal resources in the K reference signal resources.

[0128] Through this method, the first indication information can indicate the sampling rates corresponding to N reference signal resources in K reference signal resources, so that N reference signal resources can be subsequently determined through the sampling rates corresponding to N reference signal resources in K reference signal resources, so as to measure the reference signal sent by the network device on the N reference signal resources and obtain the precoding information corresponding to the M reference signal resources.

[0129] In another possible implementation manner, the first indication information indicates indexes of the N reference signal resources in the K reference signal resources.

[0130] Exemplarily, the first indication information may indicate any N index values, each of which corresponds to a reference signal resource. In other words, each index value indicates the index of one of the N reference signal resources in the K reference signal resources.

[0131] Exemplarily, the first indication information may indicate an index value. The N reference signal resources may be N consecutive reference signal resources after the index value; or, the N reference signal resources may be N consecutive reference signal resources before the index value. Further, the N reference signal resources may be determined in a predefined manner as the N consecutive reference signal resources after the index value; or, the N reference signal resources may be determined in a predefined manner as the N consecutive reference signal resources before the index value.

[0132] Through this method, the first indication information can indicate the indexes of N reference signal resources in K reference signal resources, so that the N reference signal resources can be subsequently determined by the indexes of the N reference signal resources in the K reference signal resources, so as to measure the reference signals sent by the network device on the N reference signal resources and obtain the precoding information corresponding to the M reference signal resources.

[0133] In another possible implementation, the first indication information indicates a value of N, and the N reference signal resources are first N reference signal resources among the K reference signal resources.

[0134] Exemplarily, the first N reference signal resources may be sorted according to the order of configuration of the network device, and the first N reference signal resources may be the first N reference signal resources in the reference signal resource set configured by the network device.

[0135] Exemplarily, the first N reference signal resources may be sorted according to reference signal resource IDs, and the first N reference signal resources may be the N reference signal resources with the lowest reference signal resource IDs in the reference signal resource set.

[0136] Through this method, the first indication information can indicate that the N reference signal resources are the first N reference signal resources among the K reference signal resources, so that the N reference signal resources can be directly determined subsequently, so as to measure the reference signal sent by the network device on the N reference signal resources and obtain the precoding information corresponding to the M reference signal resources.

[0137] In some embodiments, the method may further include: the network device sends second indication information to the terminal device, the second indication information is used to indicate the value of M; or, the second indication information is used to indicate whether M is allowed to be less than K.

[0138] Correspondingly, the terminal device can receive the second indication information sent by the network device.

[0139] Through this method, after the terminal device receives the second indication information sent by the network device, when the second indication information indicates that M is less than K, the terminal device measures the reference signal on N reference signal resources and can obtain precoding information corresponding to the M reference signal resources, that is, the terminal device can select M reference signal resources from the K reference signal resources; when the second indication information indicates that M is equal to K, the terminal device measures the reference signal on N reference signal resources and can obtain precoding information corresponding to K reference signal resources, that is, the terminal device is not allowed to select reference signal resources.

[0140] Based on S810, the terminal device measures the reference signal on N reference signal resources to obtain precoding information corresponding to M reference signal resources, which may include the following two methods.

[0141] Method #A: The terminal device measures the reference signal on N reference signal resources to obtain precoding information corresponding to the M reference signal resources, which may include: the terminal device measures the reference signal on N reference signal resources to obtain channel information corresponding to the N reference signal resources; inputting the channel information corresponding to the N reference signal resources into the first model to obtain precoding information corresponding to the M reference signal resources.

[0142] The channel information corresponding to the N reference signal resources may include the following possible implementations.

[0143] In a possible implementation, the channel information corresponding to the N reference signal resources may include N channel matrices corresponding to the N reference signal resources respectively.

[0144] It should be noted that a terminal device can measure a reference signal on a reference signal resource to obtain a corresponding channel matrix H. The dimension of the channel matrix H is the number of receive ports multiplied by the number of transmit ports. After measuring the reference signal on N reference signal resources, the terminal device can obtain N channel matrices H corresponding to the N reference signal resources.

[0145] In another possible implementation, the channel information corresponding to the N reference signal resources may include N eigenvector matrices corresponding to the N reference signal resources respectively.

[0146] It should be noted that a terminal device can measure a reference signal on a reference signal resource to obtain the corresponding channel covariance matrix R. By performing eigenvalue decomposition on the channel covariance matrix R, an eigenvector matrix W can be obtained. Each column vector of the eigenvector matrix W is an eigenvector. After the terminal device measures the reference signal on N reference signal resources, it can obtain N eigenvector matrices W corresponding to the N reference signal resources.

[0147] In another possible implementation, the channel information corresponding to the N reference signal resources may include a joint eigenvector matrix corresponding to the N reference signal resources, where the joint eigenvector matrix is ​​an eigenvector matrix corresponding to the merged N channel matrices.

[0148] It should be noted that the terminal device can measure reference signals on N reference signal resources, thereby obtaining N channel matrices H corresponding to the N reference signal resources respectively; after the terminal device merges the N channel matrices H, it can obtain a joint channel matrix H', and the dimension of the joint channel matrix H' is the number of receiving ports * (N * the number of transmitting ports). The eigenvector matrix corresponding to the joint channel matrix H' is the joint eigenvector matrix W', and the dimension of the joint eigenvector matrix W' is (N * the number of transmitting ports) * R, where R is the number of columns of the truncated joint channel matrix H'.

[0149] It should be noted that the channel information corresponding to the N reference signal resources may include one or more of the above possible implementations. In other words, the channel information corresponding to the N reference signal resources may include one or more of N channel matrices corresponding to the N reference signal resources, N eigenvector matrices corresponding to the N reference signal resources, and a joint eigenvector matrix corresponding to the N reference signal resources.

[0150] Through this method, the terminal device measures the reference signal and can obtain one or more of N channel matrices corresponding to N reference signal resources, N eigenvector matrices corresponding to N reference signal resources, and a joint eigenvector matrix corresponding to N reference signal resources. Subsequently, one or more of the N channel matrices, N eigenvector matrices, and a joint eigenvector matrix can be input into the first model to obtain precoding information corresponding to M reference signal resources.

[0151] Exemplarily, the channel information may be sub-band or wideband. For example, each sub-band may have N channel matrices H as channel information.

[0152] It should be noted that the first model can be configured by the terminal device itself or by the network device, and this embodiment of the present application does not limit this.

[0153] Exemplarily, the first model may be a first AI model.

[0154] Taking the example of a network device configuring a first model for a terminal device, the network device can configure a first model for the terminal device, where the first model is used to input channel information corresponding to N reference signal resources obtained by the terminal device measuring the reference signal, and output precoding information corresponding to M reference signal resources.

[0155] Furthermore, the network device configures the first model for the terminal device, which may include the following two possible implementation methods.

[0156] In a possible implementation, the first model may be determined according to one or more values ​​of K, N, and M. That is, the network device may configure the first model for the terminal device according to one or more values ​​of K, N, and M.

[0157] It should be noted that, when one or more values ​​of K, N, and M are different, the first model of the network device configuration is also different.

[0158] Exemplarily, when M is less than K, the network device may configure a first model for the terminal device based on the values ​​of N and / or M. Furthermore, the network device may pre-configure models corresponding to different values ​​of N and / or M, so that the terminal device can determine the first model based on the values ​​of N and / or M.

[0159] Furthermore, when M is less than K, different values ​​of N correspond to different first AI models; or, different values ​​of M correspond to different first AI models; or, different combinations of N and M correspond to different first AI models.

[0160] For example, when M is equal to K, the network device may configure a first model for the terminal device according to the values ​​of N and / or K. Furthermore, the network device may pre-configure models corresponding to different values ​​of N and / or K, so that the terminal device can determine the first model according to the values ​​of N and / or K.

[0161] Furthermore, when M is equal to K, different values ​​of N correspond to different first models; or, different values ​​of K correspond to different first models; or, different combinations of N and K correspond to different first models.

[0162] Through this method, the network device can configure a first model for the terminal device based on one or more values ​​of K, N, and M, so that the terminal device can subsequently obtain precoding information corresponding to M reference signal resources based on the first model.

[0163] In another possible implementation, the first model may be associated with the resource set where the K reference signal resources are located. That is, the network device may configure the first model for the terminal device based on the resource set where the K reference signal resources are located.

[0164] It should be noted that different resource sets may be associated with different models. That is, when the resource sets in which the K reference signal resources are located are different, the models configured by the network device are also different.

[0165] Exemplarily, the network device may pre-configure models corresponding to different resource sets, so that the terminal device may determine the first model according to the resource set where the K reference signal resources are located.

[0166] It should be noted that the first model is associated with the resource set where the K reference signal resources are located. It can be understood that the model information of the first model (such as model ID or model function) can be configured in the configuration information of the resource set where the K reference signal resources are located.

[0167] Through this method, the network device can configure a first model for the terminal device according to the resource set where the K reference signal resources are located, so that the terminal device can subsequently obtain precoding information corresponding to the M reference signal resources based on the first model.

[0168] Based on approach #A, the terminal device can input the obtained channel information corresponding to the N reference signal resources into the first model to obtain precoding information corresponding to the M reference signal resources. This reduces the number of reference signal resources actually used by the terminal device when obtaining the precoding information, thereby increasing the transmission rate. This also reduces the terminal device's computational complexity and power consumption.

[0169] Method #B: The terminal device measures the reference signal on N reference signal resources to obtain precoding information corresponding to the M reference signal resources, which may include: the terminal device measures the reference signal on N reference signal resources to obtain channel information corresponding to the N reference signal resources; inputting the channel information corresponding to the N reference signal resources into the second model to obtain channel information or precoding information corresponding to K reference signal resources; inputting the channel information or precoding information corresponding to the K reference signal resources into the third model to obtain precoding information corresponding to M reference signal resources; wherein M is less than K.

[0170] It should be noted that, by measuring the reference signal, the terminal device can obtain one or more of N channel matrices corresponding to the N reference signal resources, N eigenvector matrices corresponding to the N reference signal resources, and a joint eigenvector matrix corresponding to the N reference signal resources. Subsequently, one or more of the N channel matrices, the N eigenvector matrices, and the joint eigenvector matrix can be input into the second model to obtain channel information or precoding information corresponding to the K reference signal resources.

[0171] It should also be noted that the channel information corresponding to the K reference signal resources and the channel information corresponding to the N reference signal resources may be of the same type or may be different types, and this embodiment of the present application does not limit this.

[0172] Exemplarily, the channel information corresponding to N reference signal resources may be N channel matrices corresponding to the N reference signal resources respectively, and the channel information corresponding to K reference signal resources may be K channel matrices corresponding to the K reference signal resources respectively.

[0173] Exemplarily, the channel information corresponding to N reference signal resources may be N eigenvector matrices corresponding to the N reference signal resources respectively, and the channel information corresponding to K reference signal resources may be a joint eigenvector matrix corresponding to the K reference signal resources.

[0174] Exemplarily, the channel information may be sub-band or wideband. For example, each sub-band may have N channel matrices as channel information.

[0175] It should be noted that the second model can be configured by the terminal device itself or by the network device, and this embodiment of the present application does not limit this.

[0176] It should also be noted that the third model can be configured by the terminal device itself or by the network device, and this embodiment of the present application does not limit this.

[0177] Exemplarily, the second model may be a second AI model.

[0178] Exemplarily, the third model may be a third AI model.

[0179] Taking the example of a network device configuring the second model and the third model for a terminal device, the network device can configure the second model and the third model for the terminal device, where the second model is used to input the channel information corresponding to N reference signal resources obtained by the terminal device measuring the reference signal, and output the channel information or precoding information corresponding to K reference signal resources, that is, the second model is used to infer the channel information or precoding information corresponding to K reference signal resources from the channel information corresponding to N reference signal resources; the third model is used to input the channel information or precoding information corresponding to K reference signal resources, and output the precoding information corresponding to M reference signal resources; wherein M is less than K, that is, the third model is used to select M reference signal resources from the K reference signal resources.

[0180] Furthermore, the network device configures the second model and the third model for the terminal device, which may include the following two possible implementation methods.

[0181] In one possible implementation, the second model may be determined based on one or more values ​​of N and K; and / or the third model may be determined based on one or more values ​​of K and M. In other words, the network device may configure the second model for the terminal device based on one or more values ​​of N and K; and / or the network device may configure the third model for the terminal device based on one or more values ​​of K and M.

[0182] It should be noted that, when one or more values ​​of N and K are different, the second model of the network device configuration is also different.

[0183] Exemplarily, the network device may pre-configure models corresponding to different values ​​of N and / or K, so that the terminal device may determine the second model according to the values ​​of N and / or K.

[0184] Furthermore, different values ​​of N correspond to different second models; or, different values ​​of K correspond to different second models; or, different combinations of N and K correspond to different second models.

[0185] It should be noted that, when one or more values ​​of K and M are different, the third model of the network device configuration is also different.

[0186] Exemplarily, the network device may pre-configure models corresponding to different values ​​of K and / or M, so that the terminal device may determine the third model according to the values ​​of K and / or M.

[0187] Furthermore, different values ​​of K correspond to different third models; or, different values ​​of M correspond to different third models; or, different combinations of K and M correspond to different third models.

[0188] Through this method, the network device can configure a second model for the terminal device based on one or more values ​​of N and K; and / or, the network device can configure a third model for the terminal device based on one or more values ​​of K and M, so that the subsequent terminal device can obtain the precoding information corresponding to M reference signal resources based on the second model and the third model.

[0189] In another possible implementation, the second model and / or the third model is associated with the resource set where the K reference signal resources are located. That is, the network device can configure the second model and / or the third model for the terminal device based on the resource set where the K reference signal resources are located.

[0190] It should be noted that different resource sets may be associated with different models. That is, when the resource sets in which the K reference signal resources are located are different, the models configured by the network device are also different.

[0191] Exemplarily, the network device may pre-configure models corresponding to different resource sets, so that the terminal device may determine the second model and / or the third model according to the resource set where the K reference signal resources are located.

[0192] It should be noted that the second model is associated with the resource set where the K reference signal resources are located. It can be understood that the model information of the second model (such as model ID or model function) can be configured in the configuration information of the resource set where the K reference signal resources are located.

[0193] It should also be noted that the third model is associated with the resource set where the K reference signal resources are located. It can be understood that the model information of the third model (such as model ID or model function) can be configured in the configuration information of the resource set where the K reference signal resources are located.

[0194] Through this method, the network device can configure the second model and / or the third model for the terminal device based on the resource set where the K reference signal resources are located, so that the subsequent terminal device can obtain the precoding information corresponding to the M reference signal resources based on the second model and / or the third model.

[0195] It should be noted that the manner in which the network device configures the second model and the third model for the terminal device may include one or more of the above possible implementation manners.

[0196] Exemplarily, the network device may configure the second model for the terminal device based on one or more values ​​of N and K; the network device may configure the third model for the terminal device based on the resource set where the K reference signal resources are located.

[0197] Exemplarily, the network device may configure the third model for the terminal device based on one or more values ​​of K and M; the network device may configure the second model for the terminal device based on the resource set where the K reference signal resources are located.

[0198] Based on approach #B, the terminal device can input the obtained channel information corresponding to the N reference signal resources into the second model to obtain channel information or precoding information corresponding to the K reference signal resources. The channel information or precoding information corresponding to the K reference signal resources can then be input into the third model to obtain precoding information corresponding to the M reference signal resources. This reduces the number of reference signal resources actually used by the terminal device when obtaining the precoding information, thereby increasing the transmission rate. This also reduces the terminal device's computational complexity and power consumption.

[0199] In related technologies, since the terminal device needs to feedback the CSI of multiple TRPs, the CSI feedback overhead is large; if the CSI feedback overhead is limited, the accuracy of the CSI feedback will be reduced, affecting the performance of downlink multi-TRP transmission.

[0200] Based on this, in an embodiment of the present application, when the network device configures K reference signal resources for the terminal device, the terminal device can only measure the reference signals on N of the reference signal resources, and at the same time send precoding information corresponding to M reference signal resources to the network device.

[0201] Correspondingly, the network device can receive precoding information corresponding to the M reference signal resources sent by the terminal device.

[0202] It should be noted that the terminal device can put the precoding information corresponding to the M reference signal resources into one PMI for feedback, or can put it into multiple PMIs for feedback respectively, which is not limited in the embodiment of the present application.

[0203] This method, when the precoding information corresponding to the M reference signal resources is obtained based on a model (such as the first model, the second model, and the third model), can reduce the feedback signaling overhead without affecting performance. In addition, when M is less than K, the terminal device can feedback the precoding information corresponding to the selected portion of the TRP to the network device, further reducing the feedback signaling overhead.

[0204] In some embodiments, the precoding information corresponding to the M reference signal resources can be used by the network device to determine the precoding matrix used to transmit data on the antenna ports (or TRPs) corresponding to the M reference signal resources.

[0205] It should be noted that the precoding information corresponding to the M reference signal resources may be the concatenated information of the precoding information corresponding to each of the M reference signal resources, or may be the precoding information corresponding to the M jointly coded reference signal resources.

[0206] It should also be noted that the precoding information corresponding to some of the M reference signal resources can be 0. At this time, the network device does not send data on the antenna port (or TRP) corresponding to the reference signal resource.

[0207] In some embodiments, after receiving the precoding information corresponding to the M reference signal resources, the network device may determine a precoding matrix used for downlink transmission according to the precoding information corresponding to the M reference signal resources.

[0208] Exemplarily, after the network device receives the precoding information corresponding to M reference signal resources, it can use the fourth model corresponding to the first model to decode the precoding information, thereby obtaining the precoding matrix used to transmit data on the antenna ports corresponding to the M reference signal resources (i.e., the corresponding M TRPs).

[0209] Exemplarily, after the network device receives the precoding information corresponding to M reference signal resources, it can use the fifth model corresponding to the second model and the sixth model corresponding to the third model to decode the precoding information, thereby obtaining the precoding matrix used to transmit data on the antenna ports corresponding to the M reference signal resources (i.e., the corresponding M TRPs); or, the network device can use the seventh model corresponding to the second model and the third model to decode the precoding information, thereby obtaining the precoding matrix used to transmit data on the antenna ports corresponding to the M reference signal resources (i.e., the corresponding M TRPs).

[0210] Furthermore, in some embodiments, the precoding matrix corresponding to some of the M reference signal resources may be an all-0 matrix, in which case the network device does not send data on the antenna port (or TRP) corresponding to the reference signal resource.

[0211] It should be noted that the first model and the fourth model are dual-end models, which need to be deployed in pairs on the terminal device side and the network device side, and the first model and the fourth model need to be trained together.

[0212] It should also be noted that the second model, the third model, the fifth model and the sixth model are dual-end models, which need to be deployed in pairs on the terminal device side and the network device side, and the second model, the third model, the fifth model and the sixth model need to be trained together.

[0213] It should also be noted that the second model, the third model and the seventh model are dual-end models, which need to be deployed in pairs on the terminal device side and the network device side, and the second model, the third model and the seventh model need to be trained together.

[0214] Based on Method #A and Method #B, the terminal device measures the reference signal on N reference signal resources and can obtain precoding information corresponding to the M reference signal resources. Furthermore, the terminal device measures the reference signal on N reference signal resources and can also obtain third indication information. The third indication information may include one or more of the following:

[0215] The value of M;

[0216] Index indication information of M reference signal resources;

[0217] RI information corresponding to M reference signal resources;

[0218] CQI information corresponding to M reference signal resources.

[0219] The terminal device measures the reference signal on N reference signal resources to obtain the third indication information. There are two possible implementation methods.

[0220] In one possible implementation, the terminal device measures the reference signal on N reference signal resources to obtain channel information corresponding to the N reference signal resources; inputs the channel information corresponding to the N reference signal resources into the first model to obtain third indication information.

[0221] Another possible implementation method is that the terminal device measures the reference signal on N reference signal resources to obtain channel information corresponding to the N reference signal resources; inputs the channel information corresponding to the N reference signal resources into the second model to obtain channel information or precoding information corresponding to K reference signal resources; inputs the channel information or precoding information corresponding to the K reference signal resources into the third model to obtain third indication information.

[0222] Based on the first two possible implementations, the third indication information can be obtained using the same method as the precoding information.

[0223] In another possible implementation, the third indication information may also be obtained by a traditional method, without relying on an AI model. For example, the third indication information is calculated based on a predefined codebook.

[0224] It should be noted that the value of M can be the number of reference signal resources corresponding to the precoding information obtained through the model (i.e., the number of TRPs); the value of M can be the number of reference signal resources selected by the terminal device from K reference signal resources, thereby realizing the TRP selection function.

[0225] It should also be noted that the index indication information of the M reference signal resources may be information indicating M reference signal resources from the K reference signal resources.

[0226] Further, in some embodiments, the index indication information of the M reference signal resources is used to indicate the M reference signal resources from the K reference signal resources through a second bit map; or, the index indication information of the M reference signal resources is used to indicate the index of the M reference signal resources in the K reference signal resources.

[0227] Exemplarily, the index indication information of the M reference signal resources includes a K-bit bitmap, where each bit corresponds to one of the reference signal resources. When the bit value corresponding to a reference signal resource is 1, it indicates that the reference signal resource is included in the M reference signal resources; when the bit value corresponding to another reference signal resource is 0, it indicates that the other reference signal resource is not included in the M reference signal resources.

[0228] Exemplarily, the index indication information of the M reference signal resources may indicate any M index values, each of which corresponds to a reference signal resource. In other words, each index value indicates the index of one of the M reference signal resources in the K reference signal resources.

[0229] Exemplarily, the index indication information of the M reference signal resources may indicate an index value. The M reference signal resources may be the M consecutive reference signal resources after the index value; or the M reference signal resources may be the M consecutive reference signal resources before the index value. Further, the M reference signal resources may be determined in a predefined manner as the M consecutive reference signal resources after the index value; or the M reference signal resources may be determined in a predefined manner as the M consecutive reference signal resources before the index value.

[0230] It should be noted that the RI information corresponding to the M reference signal resources is the transmission layer number information corresponding to the M TRPs.

[0231] It should also be noted that the CQI information corresponding to the M reference signal resources is CQI information calculated based on precoding information corresponding to the M reference signal resources, or CQI information calculated based on a predefined precoding matrix.

[0232] In some embodiments, the terminal device may send third indication information to the network device.

[0233] Correspondingly, the network device can receive the third indication information sent by the terminal device.

[0234] It should be noted that the terminal device may receive the value of M indicated by the network device; and / or the terminal device may send the value of M to the network device. Furthermore, the network device may configure the terminal device with respect to which method is used. For example, the network device may indicate to the terminal device via RRC signaling whether the value of M needs to be reported; if reporting is not required, the network device may indicate the value of M; or the terminal device may directly assume that M = K.

[0235] It should be noted that the value of M can serve as the input of the first model or the third model, thereby affecting the output of the first model or the third model. For example, different values ​​of M can correspond to different output bit lengths.

[0236] An embodiment of the present application provides a communication method in which a terminal device can measure reference signals sent by a network device on N of K reference signal resources configured by the network device to obtain precoding information corresponding to M of the K reference signal resources; wherein one or more of the M reference signal resources are not included in the N reference signal resources, and K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K. In this way, the terminal device can obtain precoding information corresponding to the M reference signal resources by measuring reference signals on some of the reference signal resources, thereby reducing the number of reference signal resources actually used by the terminal device and improving the transmission rate, and reducing the computational complexity of measuring reference signals on the reference signal resources actually used by the terminal device and reducing the power consumption of the terminal device.

[0237] The communication method provided in the embodiment of the present application is described in detail below in conjunction with specific application scenarios.

[0238] This embodiment of the present application provides a CSI reporting method in which a terminal device can obtain channel information corresponding to N TRPs based on N reference signal resources, and use AI model reasoning to obtain precoding information corresponding to M reference signal resources (corresponding to M TRPs), where at least one of the M reference signal resources is not included in the N reference signal resources. In addition, this embodiment of the present application also takes into account the impact of model configuration, CSI discarding, CSI processing unit occupancy, CSI processing delay, and other aspects.

[0239] The embodiment of the present application uses an AI model to implement multi-TRP CSI feedback based on partial channel information, which can support different transmission schemes such as CJT and NC-JT, and achieve higher feedback accuracy or lower feedback overhead than the existing codebook feedback. At the same time, it can also reduce the overhead of the reference signal used for measurement and reduce the measurement complexity of the terminal device.

[0240] Example 1

[0241] In this embodiment, the terminal device may use a single model to determine precoding information, where M = K. This embodiment may specifically include the following steps:

[0242] S1. The network device may configure K reference signal resources for the terminal device, where K is an integer greater than 1.

[0243] Among them, among the K reference signal resources, each reference signal resource corresponds to a collaborative TRP of the terminal device, that is, the K reference signal resources are reference signal resources configured by the network device for the collaborative K TRPs respectively.

[0244] S2. The terminal device can receive K reference signal resources configured by the network device.

[0245] Exemplarily, K reference signal resources may be configured in a reference signal resource set, for example, a CSI-RS resource set for CSI measurement.

[0246] S3. The network device may send a reference signal based on N reference signal resources among the K reference signal resources; N is less than K.

[0247] That is to say, among the K TRPs corresponding to the K reference signal resources, only N TRPs actually send reference signals on the N reference signal resources, and the other KN TRPs do not send reference signals.

[0248] Furthermore, the network device may indicate first indication information to the terminal device, where the first indication information is used to indicate N reference signal resources from K reference signal resources.

[0249] S4. The terminal device may receive a reference signal sent by the network device based on N reference signal resources among the K reference signal resources.

[0250] Furthermore, the terminal device may receive first indication information sent by the network device, where the first indication information is used to indicate N reference signal resources from K reference signal resources.

[0251] In some embodiments, the first indication information indicates N reference signal resources from K reference signal resources in a Bitmap manner.

[0252] Exemplarily, the first indication information includes a K-bit bitmap, where each bit corresponds to a reference signal resource. When the bit value corresponding to a reference signal resource is 1, it indicates that the reference signal resource is included in the N reference signal resources; when the bit value corresponding to a reference signal resource is 0, it indicates that the reference signal resource is not included in the N reference signal resources.

[0253] In some other embodiments, the first indication information indicates the sampling rates corresponding to the N reference signal resources in the K reference signal resources.

[0254] It should be noted that the sampling rate can also be understood as the ratio between N and K, that is, the first indication information indicates the ratio between N and K.

[0255] It should also be noted that, based on the ratio or the sampling rate, the terminal device can perform sampling from the K reference signal resources in a predefined manner, thereby obtaining N reference signal resources. For example, when the sampling rate is 1, it represents N=K, and the N reference signal resources are K reference signal resources; when the sampling rate is 1 / 2 or 2, it represents N=K / 2, and the N reference signal resources are the 2kth (k>0, i.e., 2, 4, 6, 8, ...) or 2k+1th (k>=0, i.e., 1, 3, 5, 7, ...) reference signal resources among the K reference signal resources; when the sampling rate is 1 / 4 or 4, it represents N=K / 4, and the N reference signal resources are the 4kth (k>0, i.e., 4, 8, 12, ...), 4k+1th (k>=0, i.e., 1, 5, 9, ...), 4k+2th (k>=0, i.e., 2, 6, 10, ...), or 4k+3th (k>=0, i.e., 3, 7, 11, ...) reference signal resources among the K reference signal resources.

[0256] In some other embodiments, the first indication information indicates a value of N, and the N reference signal resources are the first N reference signal resources among the K reference signal resources.

[0257] It should be noted that the first N reference signal resources may be sorted according to the order of configuration, or may be sorted according to the reference signal resource ID (ie, the N reference signal resources with the lowest reference signal resource ID).

[0258] S5. The terminal device performs CSI measurement on the reference signal on N reference signal resources to obtain precoding information corresponding to K reference signal resources.

[0259] In some embodiments, the terminal device performs CSI measurement on the reference signal on N reference signal resources to obtain channel information corresponding to the N reference signal resources; the channel information corresponding to the N reference signal resources is used as the input of the first AI model (i.e., the first model) to infer the precoding information corresponding to the K reference signal resources.

[0260] It should be noted that different values ​​of N correspond to different first AI models; or, different values ​​of K correspond to different first AI models; or, different combinations of N and K correspond to different first AI models. The network device can pre-configure the AI ​​models corresponding to different values ​​of N and / or K, so that the terminal device can determine the first AI model based on the values ​​of N and / or K.

[0261] It should also be noted that the first AI model is associated with the resource set where the K reference signal resources are located. For example, model information (such as a model ID or model function) of the first AI model can be configured in the configuration information of the resource set, and different resource sets can be associated with different AI models.

[0262] In some embodiments, the channel information corresponding to the N reference signal resources may include one or more of the following:

[0263] (1) N channel matrices corresponding to N reference signal resources. The terminal device can perform CSI measurement based on each reference signal resource to obtain the corresponding channel matrix H, where the dimension of the matrix is ​​the number of transmit ports multiplied by the number of receive ports. The terminal device can use these N channel matrices H as input to the first AI model.

[0264] (2) N eigenvector matrices corresponding to the N reference signal resources. The terminal device can perform CSI measurement based on each reference signal resource to obtain the corresponding channel covariance matrix R. The eigenvector matrix W is obtained by performing eigenvalue decomposition on the channel covariance matrix R, where each column vector of the matrix is ​​an eigenvector. The terminal device uses these N eigenvector matrices W as the input of the first AI model.

[0265] (3) A joint eigenvector matrix corresponding to N reference signal resources. The terminal device can perform CSI measurements based on the N reference signal resources respectively to obtain N channel matrices H, and merge these N channel matrices H to obtain a joint channel matrix H', with a dimension of (N*number of transmitting ports)*number of receiving ports. The eigenvector matrix corresponding to the joint channel matrix H' is the joint eigenvector matrix W', with a dimension of (N*number of transmitting ports)*R, where R is the number of columns of the truncated joint channel matrix H'. The terminal device uses the joint eigenvector matrix W' as the input of the first AI model.

[0266] Exemplarily, the channel information may be sub-band or wideband. For example, each sub-band may have N channel matrices H as channel information.

[0267] Furthermore, the terminal device performs CSI measurement on the reference signal on N reference signal resources and can also obtain RI information and CQI information corresponding to the precoding information (i.e., third indication information). The RI information and CQI information also correspond to the K reference signal resources. The terminal device can report the RI information, CQI information, and precoding information to the network device together.

[0268] In some embodiments, the number of CSI processing units occupied by CSI measurement can be determined according to the values ​​of N and / or K.

[0269] Exemplarily, the number of CSI processing units is equal to N (i.e., the number of reference signal resources actually measured by the terminal device), or, the number of CSI processing units is equal to K (i.e., the number of reference signal resources for which the terminal device needs to estimate precoding information), or, the number of CSI processing units is equal to N+K (the sum of the number of reference signal resources actually measured by the terminal device and the number of reference signal resources for which the terminal device needs to estimate precoding information).

[0270] In some embodiments, the CSI processing delay required for CSI measurement may be determined according to the values ​​of N and / or K.

[0271] Exemplarily, the CSI processing delay required for CSI measurement may be based on an existing value plus an offset value calculated based on N and / or K.

[0272] In some embodiments, the precoding information corresponding to the K reference signal resources can be used by the network device to determine the precoding matrix used to transmit data on the antenna ports (or TRPs) corresponding to the K reference signal resources.

[0273] Among them, the antenna ports (or TRPs) corresponding to the K reference signal resources are the antenna ports (or TRPs) assumed by the terminal device to be used for sending reference signals on the K reference signal resources.

[0274] It should be noted that the precoding information can be the information obtained by concatenating the precoding information corresponding to each of the K reference signal resources, or the precoding information corresponding to the K reference signal resources jointly encoded.

[0275] It should also be noted that the precoding information corresponding to some of the K reference signal resources can be 0. In this case, the network device does not transmit data on the antenna port (or TRP) corresponding to this reference signal resource.

[0276] S6. The terminal device can report the precoding information corresponding to the K reference signal resources to the network device.

[0277] S7. The network device can receive the precoding information corresponding to the K reference signal resources reported by the terminal device, and determine the precoding matrix used for downlink transmission according to the precoding information corresponding to the K reference signal resources.

[0278] It should be noted that after receiving the precoding information corresponding to the K reference signal resources, the terminal device uses the fourth AI model (i.e., the fourth model) corresponding to the first AI model to decode the precoding information, so as to obtain the precoding matrix used for transmitting data on the antenna ports (or K TRPs) corresponding to the K reference signal resources.

[0279] It should also be noted that the precoding matrix corresponding to some of the K reference signal resources can be an all-zero matrix. In this case, the network device does not transmit data on the antenna port (or TRP) corresponding to this reference signal resource.

[0280] The embodiment of the present application provides a communication method. The terminal device can perform CSI measurement on the reference signal based on some reference signal resources, and use the first AI model to obtain the complete precoding information corresponding to the K reference signal resources. This not only reduces the actually used reference signal resources, but also reduces the complexity required for the terminal device to perform CSI measurement, and the precoding information obtained based on the first AI model can further reduce the overhead of the feedback signaling.

[0281] Embodiment 2

[0282] In this embodiment, the terminal device can use multiple models to determine the precoding information, where M < K. This embodiment can specifically include the following steps:

[0283] S1. The network device can configure K reference signal resources for the terminal device, where K is an integer greater than 1.

[0284] Among them, among the K reference signal resources, each reference signal resource corresponds to a collaborative TRP of the terminal device, that is, the K reference signal resources are reference signal resources configured by the network device for the collaborative K TRPs respectively.

[0285] S2. The terminal device can receive K reference signal resources configured by the network device.

[0286] Exemplarily, K reference signal resources may be configured in a reference signal resource set, for example, a CSI-RS resource set for CSI measurement.

[0287] S3. The network device may send a reference signal based on N reference signal resources among the K reference signal resources; N is less than L.

[0288] That is to say, among the K TRPs corresponding to the K reference signal resources, only N TRPs actually send reference signals on the N reference signal resources, and the other KN TRPs do not send reference signals.

[0289] Furthermore, the network device may indicate first indication information to the terminal device, where the first indication information is used to indicate N reference signal resources from the K reference signal resources. For specific indication methods, refer to the description in the first embodiment.

[0290] S4. The terminal device may receive a reference signal sent by the network device based on N reference signal resources among the K reference signal resources.

[0291] Furthermore, the terminal device may receive first indication information sent by the network device, where the first indication information is used to indicate N reference signal resources from the K reference signal resources. For a specific indication method, refer to the description in the first embodiment.

[0292] S5. The terminal device performs CSI measurement on the reference signal on N reference signal resources to obtain precoding information corresponding to M reference signal resources among the K reference signal resources; wherein, at least one resource among the M reference signal resources is not included in the N reference signal resources.

[0293] In some embodiments, the terminal device performs CSI measurement on the reference signal on N reference signal resources to obtain channel information corresponding to the N reference signal resources; uses the channel information corresponding to the N reference signal resources as input to the second AI model (i.e., the second model) to infer channel information or precoding information corresponding to K reference signal resources; uses the channel information or precoding information corresponding to the K reference signal resources as input to the third AI model (i.e., the third model) to infer precoding information corresponding to M reference signal resources.

[0294] It should be noted that different values ​​of N correspond to different second AI models; or, different values ​​of K correspond to different second AI models; or, different values ​​of K correspond to different third AI models; or, different values ​​of M correspond to different third AI models; or, different combinations of N and K correspond to different second AI models; or, different combinations of M and K correspond to different third AI models. The network device can pre-configure one or more of N, M, and K with different values ​​corresponding to the AI ​​model, so that the terminal device can determine the second / third AI model based on one or more of N, M, and K.

[0295] It should also be noted that the second and third AI models are associated with the resource set containing the K reference signal resources. For example, model information (such as model ID or model function) of the second and third AI models can be configured in the configuration information of the resource set, and different resource sets can be associated with different AI models.

[0296] It should also be noted that the channel information corresponding to the N reference signal resources may refer to the description in Embodiment 1. The channel information corresponding to the K reference signal resources may be of the same type as or different from the channel information corresponding to the N reference signal resources.

[0297] Exemplarily, the channel information corresponding to N reference signal resources may be N channel matrices corresponding to the N reference signal resources respectively, and the channel information corresponding to K reference signal resources may be K channel matrices corresponding to the K reference signal resources respectively.

[0298] Exemplarily, the channel information corresponding to N reference signal resources may be N eigenvector matrices corresponding to the N reference signal resources respectively, and the channel information corresponding to K reference signal resources may be a joint eigenvector matrix corresponding to the K reference signal resources.

[0299] Exemplarily, the channel information may be sub-band or wideband. For example, each sub-band may have N channel matrices as channel information.

[0300] In other embodiments, a terminal device performs CSI measurements on a reference signal on N reference signal resources to obtain channel information corresponding to the N reference signal resources. The channel information corresponding to the N reference signal resources is used as input to a first AI model to infer precoding information corresponding to M of the K reference signal resources. The specific method is similar to the method for obtaining precoding information corresponding to K reference signal resources in Example 1 and is not further described in detail in this embodiment of the present application.

[0301] Furthermore, the terminal device performs CSI measurement on the reference signal on the N reference signal resources and may also obtain third indication information, where the third indication information includes one or more of the following:

[0302] (1) The value of M, that is, the number of reference signal resources corresponding to the precoding information output by the AI ​​model (that is, the number of TRPs). The value of M can be the number of reference signal resources selected by the terminal device from K reference signal resources, thereby realizing the TRP selection function.

[0303] (2) Index indication information of M reference signal resources, i.e., information indicating M reference signal resources from K reference signal resources. This index indication information may be in the form of a bitmap of length K, or may directly indicate M resource index values, where each index value indicates the index of one of the M reference signal resources within the K reference signal resources.

[0304] (3) RI information corresponding to M reference signal resources, that is, the number of transmission layers corresponding to M TRPs.

[0305] (4) CQI information corresponding to the M reference signal resources, that is, the CQI calculated based on the precoding information corresponding to the M reference signal resources, or the CQI calculated based on a predefined precoding matrix.

[0306] It should be noted that since the M reference signal resources are selected by the terminal device based on measurements, the M reference signal resources and the N reference signal resources can be two independent resource sets or two mutually inclusive resource sets. In other words, whether the M reference signal resources and the N reference signal resources are completely disjoint or partially overlapping depends on the measurement selection results of the terminal device, and the network device does not impose any restrictions on this.

[0307] Exemplarily, the M reference signal resources include N reference signal resources and M>N, that is, more complete precoding information corresponding to the M reference signal resources can be obtained through the N reference signal resources.

[0308] In some embodiments, the terminal device may receive second indication information from the network device, where the second indication information is used to indicate the value of M, or the second indication information is used to indicate whether M is allowed to be less than K (if not allowed, then M=K). That is, the second indication information is used to indicate that the terminal device may select and report the precoding information corresponding to M reference signal resources. If the network device indicates that M=K, the specific process may refer to the description in Example 1; if the network device indicates that M may be less than K, the terminal device may report the precoding information corresponding to the selected M reference signal resources, that is, adopt the solution of this embodiment. The value of M may be used as the input of the above-mentioned third AI model or the first AI model, thereby affecting the output of the third AI model or the first AI model. For example, different values ​​of M may correspond to different output bit lengths.

[0309] In some embodiments, the number of CSI processing units occupied by CSI measurement can be determined according to the values ​​of N and / or K.

[0310] In some embodiments, the CSI processing delay required for CSI measurement may be determined according to the values ​​of N and / or K.

[0311] In some embodiments, the precoding information corresponding to the M reference signal resources can be used by the network device to determine the precoding matrix used to transmit data on the antenna ports (or TRPs) corresponding to the M reference signal resources.

[0312] It should be noted that the precoding information may be the concatenation of precoding information corresponding to each of the M reference signal resources, or may be the precoding information corresponding to the M jointly coded reference signal resources.

[0313] It should also be noted that the precoding information corresponding to some of the M reference signal resources can be 0. At this time, the network device does not send data on the antenna port (or TRP) corresponding to the reference signal resource.

[0314] S6. The terminal device may report the precoding information corresponding to the M reference signal resources to the network device.

[0315] S7. The network device may receive precoding information corresponding to the M reference signal resources reported by the terminal device, and determine a precoding matrix used for downlink transmission based on the precoding information corresponding to the M reference signal resources.

[0316] It should be noted that after the terminal device receives the precoding information corresponding to the M reference signal resources, it can use the fourth AI model corresponding to the first AI model to decode the precoding information; alternatively, it can use the fifth AI model corresponding to the second AI model (i.e., the fifth model) and the sixth AI model corresponding to the third AI model (i.e., the sixth model) to decode the precoding information; alternatively, it can use the seventh AI model (i.e., the seventh model) corresponding to the second AI model and the third AI model to decode the precoding information, thereby obtaining the precoding matrix used for transmitting data on the antenna ports (or M TRPs) corresponding to the M reference signal resources.

[0317] It should also be noted that the precoding matrix corresponding to some of the M reference signal resources can be an all-0 matrix. In this case, the network device does not send data on the antenna port (or TRP) corresponding to the reference signal resource.

[0318] An embodiment of the present application provides a communication method, in which a terminal device performs CSI measurement based on part of the reference signal resources. The precoding information corresponding to the selected M reference signal resources can be obtained by using an AI model. This not only reduces the reference signal resources actually used, but also reduces the complexity required for the terminal device to perform CSI measurement. In addition, since the precoding information corresponding to the selected part of the TRP is fed back, the feedback signaling overhead is reduced.

[0319] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, the technical solution of the present application can be subjected to a variety of simple modifications, and these simple modifications all fall within the scope of protection of the present application. For example, the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will not further explain the various possible combinations. For another example, the various different embodiments of the present application can also be arbitrarily combined, as long as they do not violate the idea of ​​the present application, they should also be regarded as the contents disclosed in the present application. For another example, under the premise of no conflict, the various embodiments and / or the technical features in each embodiment described in the present application can be arbitrarily combined with the prior art, and the technical solution obtained after the combination should also fall within the scope of protection of the present application.

[0320] It should also be understood that in the various method embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0321] FIG9 is a schematic diagram of the structure of a communication device 900 provided in an embodiment of the present application, which is applied to a terminal device. As shown in FIG9 , the communication device 900 may include:

[0322] The first processing unit 910 is configured to measure, on N reference signal resources among the K reference signal resources configured by the network device, a reference signal sent by the network device, and obtain precoding information corresponding to M reference signal resources among the K reference signal resources;

[0323] One or more reference signal resources among the M reference signal resources are not included in the N reference signal resources, K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K.

[0324] In some embodiments, the first processing unit 910 is further configured to measure the reference signal to obtain channel information corresponding to N reference signal resources; input the channel information corresponding to the N reference signal resources into the first model to obtain precoding information corresponding to M reference signal resources.

[0325] In some embodiments, the first model is determined according to one or more values ​​of K, N, and M.

[0326] In some embodiments, the first model is associated with a resource set where the K reference signal resources are located.

[0327] In some embodiments, the first processing unit 910 is further configured to measure the reference signal to obtain channel information corresponding to N reference signal resources; input the channel information corresponding to the N reference signal resources into the second model to obtain channel information or precoding information corresponding to K reference signal resources; input the channel information or precoding information corresponding to the K reference signal resources into the third model to obtain precoding information corresponding to M reference signal resources; wherein M is less than K.

[0328] In some embodiments, the second model is determined based on one or more values ​​of N and K; and / or the third model is determined based on one or more values ​​of K and M.

[0329] In some embodiments, the second model and / or the third model is associated with a resource set where the K reference signal resources are located.

[0330] In some embodiments, the channel information corresponding to the N reference signal resources includes one or more of the following:

[0331] N channel matrices corresponding to the N reference signal resources;

[0332] N eigenvector matrices corresponding to the N reference signal resources; and

[0333] A joint eigenvector matrix corresponding to the N reference signal resources is an eigenvector matrix corresponding to the merged N channel matrices.

[0334] In some embodiments, as shown in FIG9 , the communication device 900 may further include:

[0335] The first receiving unit 920 is configured to receive first indication information sent by a network device, where the first indication information is used to indicate N reference signal resources from the K reference signal resources.

[0336] In some embodiments, the first indication information indicates N reference signal resources from K reference signal resources through a first bitmap; or,

[0337] The first indication information indicates the sampling rates corresponding to the N reference signal resources in the K reference signal resources; or,

[0338] The first indication information indicates the indexes of the N reference signal resources in the K reference signal resources; or,

[0339] The first indication information indicates a value of N, where the N reference signal resources are the first N reference signal resources among the K reference signal resources.

[0340] In some embodiments, the first receiving unit 920 is further configured to receive second indication information sent by the network device, where the second indication information is used to indicate the value of M; or, the second indication information is used to indicate whether M is allowed to be less than K.

[0341] In some embodiments, as shown in FIG9 , the communication device 900 may further include:

[0342] The first sending unit 930 is configured to send precoding information corresponding to M reference signal resources to the network device.

[0343] In some embodiments, the first sending unit 930 is further configured to send third indication information to the network device, where the third indication information includes one or more of the following:

[0344] The value of M;

[0345] Index indication information of M reference signal resources;

[0346] Rank indication RI information corresponding to M reference signal resources;

[0347] Channel quality indicator CQI information corresponding to M reference signal resources.

[0348] In some embodiments, the index indication information is used to indicate M reference signal resources from K reference signal resources through a second bitmap; or,

[0349] The index indication information is used to indicate the indexes of the M reference signal resources in the K reference signal resources.

[0350] In some embodiments, the M reference signal resources include N reference signal resources, and M is greater than N.

[0351] In some embodiments, the number of channel state information (CSI) processing units used for measuring occupancy is determined according to the values ​​of N and / or K.

[0352] In some embodiments, the CSI processing delay required for measurement is determined according to the values ​​of N and / or K.

[0353] An embodiment of the present application provides a communications device in which a terminal device can measure reference signals sent by a network device on N of K reference signal resources configured by the network device, and obtain precoding information corresponding to M of the K reference signal resources; wherein one or more of the M reference signal resources are not included in the N reference signal resources, and K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K. In this way, the terminal device can obtain precoding information corresponding to the M reference signal resources by measuring reference signals on the N reference signal resources, thereby reducing the number of reference signal resources actually used by the terminal device and improving the transmission rate, and reducing the computational complexity of measuring reference signals on the reference signal resources actually used by the terminal device, thereby reducing the power consumption of the terminal device.

[0354] Those skilled in the art should understand that the relevant description of the above-mentioned communication device in the embodiment of the present application can be understood with reference to the relevant description of the communication method in the embodiment of the present application.

[0355] FIG10 is a schematic diagram of the structure of a communication device 1000 provided in an embodiment of the present application, which is applied to a network device. As shown in FIG10 , the communication device 1000 may include:

[0356] The second sending unit 1010 is configured to send a reference signal to the terminal device on N reference signal resources among the K reference signal resources configured for the terminal device;

[0357] The second receiving unit 1020 is configured to receive precoding information corresponding to M reference signal resources among the K reference signal resources sent by the terminal device;

[0358] One or more reference signal resources among the M reference signal resources are not included in the N reference signal resources, K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K.

[0359] In some embodiments, as shown in FIG10 , the communication device 1000 may include:

[0360] The second processing unit 1030 is configured to configure a first model for the terminal device, where the first model is used to input channel information corresponding to N reference signal resources obtained by the terminal device measuring the reference signal, and output precoding information corresponding to M reference signal resources.

[0361] In some embodiments, the first model is determined according to one or more values ​​of K, N, and M.

[0362] In some embodiments, the first model is associated with a resource set where the K reference signal resources are located.

[0363] In some embodiments, the second processing unit 1030 is further configured to configure a second model and a third model for the terminal device, the second model being used to input channel information corresponding to N reference signal resources obtained by the terminal device measuring the reference signal, and output channel information or precoding information corresponding to K reference signal resources; the third model being used to input channel information or precoding information corresponding to K reference signal resources, and output precoding information corresponding to M reference signal resources; wherein M is less than K.

[0364] In some embodiments, the second model is determined based on one or more values ​​of N and K; and / or,

[0365] The third model is determined according to one or more values ​​of K and M.

[0366] In some embodiments, the second model and / or the third model is associated with a resource set where the K reference signal resources are located.

[0367] In some embodiments, the channel information corresponding to the N reference signal resources includes one or more of the following:

[0368] N channel matrices corresponding to the N reference signal resources;

[0369] N eigenvector matrices corresponding to the N reference signal resources; and

[0370] A joint eigenvector matrix corresponding to the N reference signal resources is an eigenvector matrix corresponding to the merged N channel matrices.

[0371] In some embodiments, the second sending unit 1010 is further configured to send first indication information to the terminal device, where the first indication information is used to indicate N reference signal resources from the K reference signal resources.

[0372] In some embodiments, the first indication information indicates N reference signal resources from K reference signal resources through a first bitmap; or,

[0373] The first indication information indicates the sampling rates corresponding to the N reference signal resources in the K reference signal resources; or,

[0374] The first indication information indicates the indexes of the N reference signal resources in the K reference signal resources; or,

[0375] The first indication information indicates a value of N, where the N reference signal resources are the first N reference signal resources among the K reference signal resources.

[0376] In some embodiments, the second sending unit 1010 is further configured to send second indication information to the terminal device, where the second indication information is used to indicate the value of M; or, the second indication information is used to indicate whether M is allowed to be less than K.

[0377] In some embodiments, the second receiving unit 1020 is further configured to receive third indication information sent by the terminal device, where the third indication information includes one or more of the following:

[0378] The value of M;

[0379] Index indication information of M reference signal resources;

[0380] Rank indication RI information corresponding to M reference signal resources;

[0381] Channel quality indicator CQI information corresponding to M reference signal resources.

[0382] In some embodiments, the index indication information indicates M reference signal resources from the K reference signal resources through a second bitmap; or,

[0383] The index indication information indicates the indexes of the M reference signal resources among the K reference signal resources.

[0384] In some embodiments, the M reference signal resources include N reference signal resources, and M is greater than N.

[0385] In some embodiments, the number of channel state information (CSI) processing units used for measuring occupancy is determined according to the values ​​of N and / or K.

[0386] In some embodiments, the CSI processing delay required for measurement is determined according to the values ​​of N and / or K.

[0387] An embodiment of the present application provides a communication device that sends a reference signal to a terminal device on N reference signal resources out of the K reference signal resources configured for the terminal device; and receives precoding information corresponding to M reference signal resources out of the K reference signal resources sent by the terminal device; wherein one or more reference signal resources out of the M reference signal resources are not included in the N reference signal resources, and K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K. In this way, the terminal device measures the reference signal on the N reference signal resources and can obtain the precoding information corresponding to the M reference signal resources, thereby not only reducing the reference signal resources actually used by the terminal device and improving the transmission rate, but also reducing the computational complexity of the terminal device measuring the reference signal on the reference signal resources actually used, and reducing the power consumption of the terminal device. In addition, when M is less than K, the network device can receive the precoding information corresponding to part of the TRP sent by the terminal device, thereby reducing the feedback signaling overhead.

[0388] Those skilled in the art should understand that the relevant description of the above-mentioned communication device in the embodiment of the present application can be understood with reference to the relevant description of the communication method in the embodiment of the present application.

[0389] FIG11 is a schematic structural diagram of a communication device provided in an embodiment of the present application. The communication device 1100 may be a terminal device or a network device. The communication device 1100 shown in FIG11 may include a processor 1110 and a memory 1120, wherein:

[0390] The memory 1120 may be used to store computer-executable instructions;

[0391] The processor 1110 is connected to the memory 1120 and is configured to implement the method in the embodiment of the present application by executing computer-executable instructions.

[0392] The memory 1120 may be a separate device from the processor 1110 , or may be integrated into the processor 1110 .

[0393] In some embodiments, as shown in FIG11 , the communication device 1100 may further include a transceiver 1130 , and the processor 1110 may control the transceiver 1130 to communicate with other devices. Specifically, the transceiver 1130 may send information or data to other devices, or receive information or data sent by other devices.

[0394] The transceiver 1130 may include a transmitter and a receiver. The transceiver 1130 may further include an antenna, and the number of antennas may be one or more.

[0395] In some embodiments, the communication device 1100 may be a terminal device of an embodiment of the present application, and the communication device 1100 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0396] In some embodiments, the communication device 1100 may be a network device of an embodiment of the present application, and the communication device 1100 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0397] FIG12 is a schematic structural diagram of a chip provided in an embodiment of the present application. The chip 1200 shown in FIG12 includes a processor 1210 and a memory 1220, wherein:

[0398] The processor 1210 can call and run a computer program from the memory 1220, so that the device equipped with the chip executes the method in the embodiment of the present application.

[0399] The memory 1220 may be a separate device independent of the processor 1210 , or may be integrated into the processor 1210 .

[0400] In some embodiments, the chip 1200 may further include an input interface 1230. The processor 1210 may control the input interface 1230 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0401] In some embodiments, the chip 1200 may further include an output interface 1240. The processor 1210 may control the output interface 1240 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0402] In some embodiments, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0403] In some embodiments, the chip can be applied to the terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0404] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0405] FIG13 is a schematic block diagram of a communication system provided in an embodiment of the present application. As shown in FIG13 , the communication system 1300 includes a terminal device 1310 and a network device 1320 .

[0406] Among them, the terminal device 1310 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1320 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they will not be repeated here.

[0407] It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by hardware integrated logic circuits in the processor or software instructions. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0408] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0409] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0410] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by at least one processor, the method in the embodiment of the present application is implemented.

[0411] In some embodiments, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0412] In some embodiments, the computer-readable storage medium can be applied to the terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0413] An embodiment of the present application also provides a computer program product, which includes a computer storage medium, the computer storage medium storing a computer program, and the computer program including instructions that can be executed by at least one processor. When the instructions are executed by at least one processor, the method in the embodiment of the present application is implemented.

[0414] In some embodiments, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0415] In some embodiments, the computer program product can be applied to the terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0416] The embodiments of the present application also provide a computer program, which enables a computer to execute the method in the embodiments of the present application.

[0417] In some embodiments, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0418] In some embodiments, the computer program can be applied to the terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0419] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0420] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0421] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0422] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0423] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0424] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0425] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A communication method, the method comprising: On N reference signal resources among K reference signal resources configured by the network device, measuring a reference signal sent by the network device to obtain precoding information corresponding to M reference signal resources among the K reference signal resources; One or more reference signal resources among the M reference signal resources are not included in the N reference signal resources, and K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K.

2. The method according to claim 1, wherein: The measuring the reference signal sent by the network device to obtain precoding information corresponding to M reference signal resources among the K reference signal resources includes: Measuring the reference signal to obtain channel information corresponding to the N reference signal resources; Channel information corresponding to the N reference signal resources is input into a first model to obtain precoding information corresponding to the M reference signal resources.

3. The method according to claim 2, wherein: The first model is determined according to one or more values ​​of K, N, and M.

4. The method according to claim 2, wherein: The first model is associated with a resource set where the K reference signal resources are located.

5. The method according to claim 1, wherein: The measuring the reference signal sent by the network device to obtain precoding information corresponding to M reference signal resources among the K reference signal resources includes: Measuring the reference signal to obtain channel information corresponding to the N reference signal resources; Inputting the channel information corresponding to the N reference signal resources into a second model to obtain the channel information or precoding information corresponding to the K reference signal resources; The channel information or precoding information corresponding to the K reference signal resources is input into a third model to obtain the precoding information corresponding to the M reference signal resources; wherein M is less than K.

6. The method according to claim 5, wherein: The second model is determined according to one or more values ​​of N and K; and / or, The third model is determined according to one or more values ​​of K and M.

7. The method according to claim 5, wherein: The second model and / or the third model is associated with a resource set where the K reference signal resources are located.

8. The method according to any one of claims 2 to 7, wherein: The channel information corresponding to the N reference signal resources includes one or more of the following: N channel matrices corresponding to the N reference signal resources respectively; N eigenvector matrices corresponding to the N reference signal resources respectively; as well as, A joint eigenvector matrix corresponding to the N reference signal resources, wherein the joint eigenvector matrix is ​​an eigenvector matrix corresponding to the merged N channel matrices.

9. The method according to any one of claims 1 to 8, wherein: The method further comprises: First indication information sent by the network device is received, where the first indication information is used to indicate the N reference signal resources from the K reference signal resources.

10. The method according to claim 9, wherein: The first indication information indicates the N reference signal resources from the K reference signal resources through a first bitmap; or, The first indication information indicates a sampling rate corresponding to the N reference signal resources in the K reference signal resources; or, The first indication information indicates the indexes of the N reference signal resources in the K reference signal resources; or, The first indication information indicates a value of N, and the N reference signal resources are first N reference signal resources among the K reference signal resources.

11. The method according to any one of claims 1 to 10, wherein: The method further comprises: Receive second indication information sent by the network device, where the second indication information is used to indicate a value of M; or, the second indication information is used to indicate whether M is allowed to be less than K.

12. The method according to any one of claims 1 to 11, wherein: The method further comprises: Send precoding information corresponding to the M reference signal resources to the network device.

13. The method according to any one of claims 1 to 12, wherein: The method further comprises: Sending third indication information to the network device, where the third indication information includes one or more of the following: The value of M; Index indication information of the M reference signal resources; Rank indication RI information corresponding to the M reference signal resources; Channel quality indicator CQI information corresponding to the M reference signal resources.

14. The method according to claim 13, wherein: The index indication information is used to indicate the M reference signal resources from the K reference signal resources through a second bit map; or, The index indication information is used to indicate indexes of the M reference signal resources in the K reference signal resources.

15. The method according to any one of claims 1 to 14, wherein: The M reference signal resources include the N reference signal resources, and M is greater than N.

16. The method according to any one of claims 1 to 15, wherein: The number of channel state information CSI processing units occupied by the measurement is determined according to the values ​​of N and / or K.

17. The method according to any one of claims 1 to 16, wherein: The CSI processing delay required for the measurement is determined according to the values ​​of N and / or K.

18. A communication method, the method comprising: Sending a reference signal to the terminal device on N reference signal resources among the K reference signal resources configured for the terminal device; Receiving precoding information corresponding to M reference signal resources among the K reference signal resources sent by the terminal device; One or more reference signal resources among the M reference signal resources are not included in the N reference signal resources, and K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K.

19. The method according to claim 18, wherein: The method further comprises: A first model is configured for the terminal device, wherein the first model is used to input channel information corresponding to the N reference signal resources obtained by the terminal device measuring the reference signal, and output precoding information corresponding to the M reference signal resources.

20. The method according to claim 19, wherein: The first model is determined according to one or more values ​​of K, N, and M.

21. The method according to claim 19, wherein: The first model is associated with a resource set where the K reference signal resources are located.

22. The method according to claim 18, wherein: The method further comprises: A second model and a third model are configured for the terminal device, wherein the second model is used to input channel information corresponding to the N reference signal resources obtained by the terminal device measuring the reference signal, and output channel information or precoding information corresponding to the K reference signal resources; the third model is used to input channel information or precoding information corresponding to the K reference signal resources, and output precoding information corresponding to the M reference signal resources; wherein M is less than K.

23. The method according to claim 22, wherein: The second model is determined according to one or more values ​​of N and K; and / or, The third model is determined according to one or more values ​​of K and M.

24. The method according to claim 22, wherein: The second model and / or the third model is associated with a resource set where the K reference signal resources are located.

25. The method according to any one of claims 19 to 24, wherein: The channel information corresponding to the N reference signal resources includes one or more of the following: N channel matrices corresponding to the N reference signal resources respectively; N eigenvector matrices corresponding to the N reference signal resources respectively; as well as, A joint eigenvector matrix corresponding to the N reference signal resources, wherein the joint eigenvector matrix is ​​an eigenvector matrix corresponding to the merged N channel matrices.

26. The method according to any one of claims 18 to 25, wherein: The method further comprises: Sending first indication information to the terminal device, where the first indication information is used to indicate the N reference signal resources from the K reference signal resources.

27. The method according to claim 26, wherein: The first indication information indicates the N reference signal resources from the K reference signal resources through a first bitmap; or, The first indication information indicates a sampling rate corresponding to the N reference signal resources in the K reference signal resources; or, The first indication information indicates the indexes of the N reference signal resources in the K reference signal resources; or, The first indication information indicates a value of N, and the N reference signal resources are first N reference signal resources among the K reference signal resources.

28. The method according to any one of claims 18 to 27, wherein: The method further comprises: Sending second indication information to the terminal device, where the second indication information is used to indicate the value of M; or, the second indication information is used to indicate whether M is allowed to be less than K.

29. The method according to any one of claims 18 to 28, wherein: The method further comprises: Receive third indication information sent by the terminal device, where the third indication information includes one or more of the following: The value of M; Index indication information of the M reference signal resources; Rank indication RI information corresponding to the M reference signal resources; Channel quality indicator CQI information corresponding to the M reference signal resources.

30. The method of claim 29, wherein: The index indication information indicates the M reference signal resources from the K reference signal resources through a second bit map; or, The index indication information indicates indexes of the M reference signal resources among the K reference signal resources.

31. The method according to any one of claims 18 to 30, wherein: The M reference signal resources include the N reference signal resources, and M is greater than N.

32. The method according to any one of claims 18 to 31, wherein: The number of channel state information CSI processing units occupied by the measurement is determined according to the values ​​of N and / or K.

33. A method according to any one of claims 18 to 32, wherein: The CSI processing delay required for the measurement is determined according to the values ​​of N and / or K.

34. A communication device, applied to a terminal device, comprising: A first processing unit is configured to measure, on N reference signal resources among K reference signal resources configured by the network device, a reference signal sent by the network device, and obtain precoding information corresponding to M reference signal resources among the K reference signal resources; One or more reference signal resources among the M reference signal resources are not included in the N reference signal resources, and K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K.

35. A communication device, applied to a network device, comprising: A second sending unit, configured to send a reference signal to the terminal device on N reference signal resources among the K reference signal resources configured for the terminal device; A second receiving unit, configured to receive precoding information corresponding to M reference signal resources among the K reference signal resources sent by the terminal device; One or more reference signal resources among the M reference signal resources are not included in the N reference signal resources, and K is an integer greater than 1, N and M are both integers greater than 0, and N is less than K.

36. A terminal device, comprising: A memory for storing computer executable instructions; A processor, connected to the memory, configured to implement the method of any one of claims 1 to 17 by executing the computer executable instructions.

37. A network device comprising: A memory for storing computer executable instructions; A processor, connected to the memory, configured to implement the method of any one of claims 18 to 33 by executing the computer executable instructions.

38. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 17, or executes a method as claimed in any one of claims 18 to 33.

39. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by at least one processor, implements the method according to any one of claims 1 to 17, or implements the method according to any one of claims 18 to 33.

40. A computer program product, comprising a computer storage medium storing a computer program, wherein the computer program comprises instructions executable by at least one processor, and when the instructions are executed by the at least one processor, the method of any one of claims 1 to 17 is implemented, or the method of any one of claims 18 to 33 is implemented.

41. A computer program, wherein the computer program enables a computer to execute the method according to any one of claims 1 to 17, or implement the method according to any one of claims 18 to 33.

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