Communication method and communication apparatus

Abstract

The present application provides a communication method and a communication apparatus. The method can comprise: determining a first channel state information (CSI) report on the basis of M reference signal resources, the M reference signal resources comprising a first resource and a second resource, a first codebook parameter of a codebook used by the first resource being different from that of a codebook used by the second resource, and the first resource and the second resource comprising one or more resources, respectively, wherein the first CSI report comprises a parameter corresponding to the first resource and a parameter corresponding to the second resource, and the parameter corresponding to the first resource is arranged before the parameter corresponding to the second resource. By means of the method, an arrangement order of CSI fields can be optimized, and the priorities of multiple sets of CSI measurement results reported in a same CSI report are defined, so that when an uplink resource is limited, a terminal device can report CSI measurement results corresponding to beams of high codebook precision, thereby improving CSI feedback quality.

Description

Communication methods and communication devices

[0001] This application claims priority to Chinese Patent Application No. 202410932773.7, filed on July 11, 2024, entitled "Communication Method and Communication Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and more specifically, to a communication method and a communication device. Background Technology

[0003] In higher frequency communication systems, hybrid beamforming (HBF) technology can confine the energy of transmitted signals within a specific beam direction, thereby achieving higher antenna array gain.

[0004] For example, HBF technology ensures that analog beams are aligned with the communication target through beam scanning. One beam scanning process is as follows: the base station sends reference signals to the terminal through different analog beams, and each reference signal corresponds one-to-one with an analog beam. The terminal measures the reference signal to determine the channel state information (CSI) of its corresponding channel. The CSI reflects the beam quality of the analog beam corresponding to the reference signal. Based on the CSI, a matching analog beam can be determined for the terminal device, thus achieving beam alignment.

[0005] However, with the increase in the number of beams, how to balance the feedback overhead of channel state information and system performance is a problem that needs to be considered. Summary of the Invention

[0006] This application provides a communication method and a communication device to ensure the quality of CSI feedback in the event of reporting resource shortages or reporting conflicts.

[0007] Firstly, a communication method is provided. This method can be executed by a terminal side, or by other entities, and this application does not limit the scope of execution. The terminal side includes a terminal device, or chips or circuits within the terminal device (such as a modem chip, also known as a baseband chip, or a system-on-a-chip (SoC) chip or system-in-package (SIP) chip including a modem core), or functional modules within the terminal device capable of calling and executing programs. For ease of description, the following explanation uses a terminal device as an example.

[0008] The method includes: determining a first channel state information (CSI) report based on M reference signal resources, wherein the M reference signal resources include a first resource and a second resource, the first codebook parameters of the codebook used by the first resource and the codebook used by the second resource are different, and the first resource and the second resource each include one or more resources, wherein the first CSI report includes a first parameter and a second parameter, the first parameter being the parameter corresponding to the first resource, the second parameter being the parameter corresponding to the second resource, the first parameter being arranged before the second parameter, and the first parameter including at least one of the following parameters: Channel State Information Reference Signal Resource Indicator (CRI), Rank Indicator (RI), Wideband Channel Quality Indicator (CQI) of the first transport block (TB), Subband Differential CQI of the first TB, and selected L n Value indication, selected L n Indicator of value combination and indicator of the sum of all non-zero coefficients of all layers, K NZ The second parameter includes at least one of the following parameters: CRI, RI, broadband CQI of the first TB, subband differential CQI of the first TB, and selected L. n Value indication, selected L n Indicator of value combination and indicator of the sum of all non-zero coefficients of all layers, K NZ ; and / or, the first CSI report includes a third parameter and a fourth parameter, wherein the third parameter is a parameter corresponding to the first resource, and the fourth parameter is a parameter corresponding to the second resource, the third parameter being arranged before the fourth parameter, and the third parameter including at least one of the following parameters: layer indicator LI, wideband precoding matrix indicator PMI, wideband CQI of the second TB, subband differential PMI, subband differential CQI of the second TB, PMI field X1, the first part of PMI field X2, and the second part of PMI field X2; the fourth parameter including at least one of the following parameters: layer indicator LI, wideband precoding matrix indicator PMI, wideband CQI of the second TB, subband differential PMI, subband differential CQI of the second TB, PMI field X1, the first part of PMI field X2, and the second part of PMI field X2; and the first CSI report is sent.

[0009] Based on the above scheme, the arrangement order of CSI fields is optimized, and the priority of multiple sets of CSI measurement results reported in the same CSI report is defined. The CSI measurement results corresponding to resources with higher codebook priority are placed at the beginning of the CSI report. In the event of resource shortage or reporting conflict, the CSI parameter fields corresponding to the second resource are discarded first, and the CSI parameters corresponding to the first resource are retained as much as possible, thereby ensuring the quality of CSI feedback.

[0010] In some implementations, the first codebook parameter is used to characterize the codebook precision.

[0011] Based on the above scheme, feedback can be provided through codebook types with different precisions, and the order of CSI information for resources with different codebook precisions can be defined to improve the quality of CSI feedback.

[0012] The first CSI report comprises four sets of parameters in two parts. Part 1 includes the first set of parameters, and Part 2 includes the second set, the third set, and the fourth set. Specifically, the first set of parameters corresponds to Part 1 of the first CSI report and includes the first and second parameters; the second set of parameters corresponds to the broadband form of Part 2 of the first CSI report and / or Group 0 of Part 2 of the first CSI report, including the fifth and sixth parameters; the third set of parameters corresponds to the even-numbered subband form of Part 2 of the first CSI report and / or Group 1 of Part 2 of the first CSI report, including the seventh and eighth parameters; and the fourth set of parameters corresponds to the odd-numbered subband form of Part 2 of the first CSI report and / or Group 2 of Part 2 of the first CSI report, including the ninth and tenth parameters.

[0013] In some implementations, the third parameter includes a fifth parameter, the fourth parameter includes a sixth parameter, the fifth parameter is arranged before the sixth parameter, and the fifth parameter includes at least one of the following parameters: layer indicator LI, wideband precoding matrix indicator PMI, wideband CQI of the second TB and PMI field X1, and the sixth parameter includes at least one of the following parameters: layer indicator LI, wideband precoding matrix indicator PMI, wideband CQI of the second TB and PMI field X1.

[0014] In some implementations, the third parameter includes a seventh parameter, the fourth parameter includes an eighth parameter, and the seventh parameter is arranged before the eighth parameter. The seventh parameter includes at least one of the following parameters: the PMI subband information field X2 corresponding to the even-numbered subband, the subband differential CQI of the second TB corresponding to the even-numbered subband, and the first part of the PMI field X2. The eighth parameter includes at least one of the following parameters: the PMI subband information field X2 corresponding to the even-numbered subband, the subband differential CQI of the second TB corresponding to the even-numbered subband, and the first part of the PMI field X2.

[0015] In some implementations, the third parameter includes a ninth parameter. The fourth parameter includes a tenth parameter, and the ninth parameter is arranged before the tenth parameter. The ninth parameter includes at least one of the following parameters: the PMI subband information field X2 corresponding to the odd-numbered subband, the subband differential CQI of the second TB corresponding to the odd-numbered subband, and the second part of the PMI field X2. The tenth parameter includes at least one of the following parameters: the PMI subband information field X2 corresponding to the odd-numbered subband, the subband differential CQI of the second TB corresponding to the odd-numbered subband, and the second part of the PMI field X2.

[0016] In some implementations, the first parameter may also include at least one of the third parameters.

[0017] Based on the above scheme, the terminal device moves the third parameter, which was originally included in the second part (part 2), to the first part (part 1), thereby avoiding the loss of the CSI parameter of the first resource in the second part (part 2) in broadband form.

[0018] In some implementations, the third parameter may also include at least one of the second parameters.

[0019] Based on the above scheme, the terminal device will move the second parameter, which was originally included in the first part (part 1), to the second part (part 2), thereby ensuring that the CSI parameter corresponding to the first resource in the first part (part 1) is reported first.

[0020] In some implementations, the first codebook parameters of the codebook used by the first resource and the codebook used by the second resource are different, including: the codebook types of the codebook used by the first resource and the codebook used by the second resource are different.

[0021] In some implementations, the PMI corresponding to the first resource uses a codebook of the first codebook type as the first codebook, and the PMI corresponding to the second resource uses a codebook of the second codebook. When the codebook types of the first codebook and the second codebook are the same, the method further includes: determining a first reporting parameter based on the codebook types of the first codebook and the second codebook. The first reporting parameter includes one or more of the following: the number of Channel State Information Reference Signal (CSI-RS) resources, the number of ports of the CSI-RS resources, and the size of the Rank Indicator (RI).

[0022] In some implementations, the PMI corresponding to the first resource uses a codebook of the first codebook type as the first codebook, and the PMI corresponding to the second resource uses a codebook of the second codebook. When the codebook types of the first codebook and the second codebook are different, the method further includes: determining a first reporting parameter based on a first condition. The first reporting parameter includes one or more of the following: the number of Channel State Information Reference Signal (CSI-RS) resources, the number of ports of the CSI-RS resources, and the size of the Rank Indicator (RI).

[0023] Secondly, a communication method is provided. This method can be executed by the network side, or by other entities, and this application does not limit this. The network side includes a network device, a chip or circuit within the network device, a central unit (CU) or distributed unit (DU) within the network device, or a functional module within the network device capable of calling and executing a program. For ease of description, the following explanation uses execution by a network device as an example.

[0024] The method includes: receiving a first Channel State Information (CSI) report, the first CSI report being determined based on M reference signal resources, the M reference signal resources including a first resource and a second resource, wherein the first codebook parameters of the codebook used by the first resource and the codebook used by the second resource are different, wherein...

[0025] The first CSI report includes a first parameter and a second parameter. The first parameter corresponds to a first resource, and the second parameter corresponds to a second resource. The first parameter is listed before the second parameter. The first parameter includes at least one of the following parameters: Channel State Information Reference Signal Resource Indicator (CRI), Rank Indicator (RI), Wideband Channel Quality Indicator (CQI) for the first transport block (TB), Subband Differential CQI for the first TB, and Selected L n Value indication, selected L n Indicator of value combination and indicator of the sum of all non-zero coefficients of all layers, K NZ The second parameter includes at least one of the following parameters: CRI, RI, broadband CQI of the first TB, subband differential CQI of the first TB, and selected L. n Value indication, selected L n Indicator of value combination and indicator of the sum of all non-zero coefficients of all layers, K NZ ; and / or,

[0026] The first CSI report includes a third parameter and a fourth parameter. The third parameter is a parameter corresponding to the first resource, and the fourth parameter is a parameter corresponding to the second resource. The third parameter is listed before the fourth parameter. The third parameter includes at least one of the following parameters: Layer Indicator (LI), Wideband Precoding Matrix Indicator (PMI), Wideband CQI of the second TB, Subband Differential PMI, Subband Differential CQI of the second TB, PMI field X1, the first part of PMI field X2, and the second part of PMI field X2. The fourth parameter includes at least one of the following parameters: Layer Indicator (LI), Wideband Precoding Matrix Indicator (PMI), Wideband CQI of the second TB, Subband Differential PMI, Subband Differential CQI of the second TB, PMI field X1, the first part of PMI field X2, and the second part of PMI field X2.

[0027] In some implementations, the first codebook parameter is used to characterize the codebook precision.

[0028] The first CSI report comprises four sets of parameters in two parts. Part 1 includes the first set of parameters, and Part 2 includes the second set, the third set, and the fourth set. Specifically, the first set of parameters corresponds to Part 1 of the first CSI report and includes the first and second parameters; the second set of parameters corresponds to the broadband form of Part 2 of the first CSI report and / or Group 0 of Part 2 of the first CSI report, including the fifth and sixth parameters; the third set of parameters corresponds to the even-numbered subband form of Part 2 of the first CSI report and / or Group 1 of Part 2 of the first CSI report, including the seventh and eighth parameters; and the fourth set of parameters corresponds to the odd-numbered subband form of Part 2 of the first CSI report and / or Group 2 of Part 2 of the first CSI report, including the ninth and tenth parameters.

[0029] In some implementations, the third parameter includes a fifth parameter, the fourth parameter includes a sixth parameter, the fifth parameter is arranged before the sixth parameter, and the fifth parameter includes at least one of the following parameters: layer indicator LI, wideband precoding matrix indicator PMI, wideband CQI of the second TB and PMI field X1, and the sixth parameter includes at least one of the following parameters: layer indicator LI, wideband precoding matrix indicator PMI, wideband CQI of the second TB and PMI field X1.

[0030] In some implementations, the third parameter includes a seventh parameter, the fourth parameter includes an eighth parameter, and the seventh parameter is arranged before the eighth parameter. The seventh parameter includes at least one of the following parameters: the PMI subband information field X2 corresponding to the even-numbered subband, the subband differential CQI of the second TB corresponding to the even-numbered subband, and the first part of the PMI field X2. The eighth parameter includes at least one of the following parameters: the PMI subband information field X2 corresponding to the even-numbered subband, the subband differential CQI of the second TB corresponding to the even-numbered subband, and the first part of the PMI field X2.

[0031] In some implementations, the third parameter includes a ninth parameter. The fourth parameter includes a tenth parameter, and the ninth parameter is arranged before the tenth parameter. The ninth parameter includes at least one of the following parameters: the PMI subband information field X2 corresponding to the odd-numbered subband, the subband differential CQI of the second TB corresponding to the odd-numbered subband, and the second part of the PMI field X2. The tenth parameter includes at least one of the following parameters: the PMI subband information field X2 corresponding to the odd-numbered subband, the subband differential CQI of the second TB corresponding to the odd-numbered subband, and the second part of the PMI field X2.

[0032] In some implementations, the first parameter may also include at least one of the third parameters.

[0033] In some implementations, the third parameter may also include at least one of the second parameters.

[0034] In some implementations, the first codebook parameters of the codebook used by the first resource and the codebook used by the second resource are different, including: the codebook types of the codebook used by the first resource and the codebook used by the second resource are different.

[0035] In some implementations, the PMI corresponding to the first resource uses a codebook of the first codebook type as the first codebook, and the PMI corresponding to the second resource uses a codebook of the second codebook. When the codebook types of the first codebook and the second codebook are the same, the method further includes: determining a first reporting parameter based on the codebook types of the first codebook and the second codebook. The first reporting parameter includes one or more of the following: the number of Channel State Information Reference Signal (CSI-RS) resources, the number of ports of the CSI-RS resources, and the size of the Rank Indicator (RI).

[0036] Thirdly, a communication device is provided, which may be a terminal device, or a module or unit (e.g., a chip, a chip system, or a circuit) in the terminal device that corresponds to each of the methods, operations, steps, or actions described in the first aspect above, or a device that can be matched with the terminal.

[0037] In one possible implementation, the communication device includes a transceiver unit (or communication module) and a processing unit (or processing module) connected to the transceiver unit.

[0038] The transceiver unit can perform the receiving and transmitting processes in the first aspect described above, and the processing unit can perform other processes in the first aspect described above besides receiving and transmitting.

[0039] Fourthly, a communication device is provided, which may be a network device, or a module or unit (e.g., a chip, a chip system, or a circuit) in the network device that corresponds to each of the methods, operations, steps, or actions described in the second aspect above, or a device that can be used in conjunction with the network device.

[0040] In one possible implementation, the communication device includes a transceiver unit (or communication module) and a processing unit (or processing module) connected to the transceiver unit.

[0041] The transceiver unit can perform the receiving and sending processes in the second aspect described above, and the processing unit of the communication device can perform other processes in the second aspect described above besides receiving and sending.

[0042] Fifthly, a communication device is provided. This communication device can be either the receiving device or the transmitting device described above. The communication device includes a transceiver, a processor, and a memory. The processor controls the transceiver to transmit and receive signals, the memory stores a computer program, and the processor retrieves and runs the computer program from the memory, causing the communication device to perform the method in any possible implementation of the first or second aspect described above.

[0043] Optionally, there may be one or more processors and one or more memories.

[0044] Alternatively, the memory can be integrated with the processor, or the memory can be set up separately from the processor.

[0045] Optionally, the communication device may also include a transmitter and a receiver.

[0046] Sixthly, a communication system is provided. The communication system includes a terminal side and / or a network side, wherein the terminal side is used to execute the method in any possible implementation of the first aspect described above, and the network side is used to execute the method in any possible implementation of the second aspect described above.

[0047] For example, the terminal side can be a terminal device, or a chip or circuit in the terminal device, or a functional module in the terminal device that can call and execute a program.

[0048] For example, the network side can be a network device, or a chip or circuit in the network device, or a CU or DU in the network device, or a functional module in the network device that can call and execute a program.

[0049] In a seventh aspect, a computer-readable storage medium is provided. This computer-readable storage medium stores computer program code or instructions that, when executed, cause the method in any of the possible implementations of the first or second aspect to be implemented.

[0050] Eighthly, a chip or chip system is provided. The chip or chip system includes at least one processor coupled to a memory for storing a computer program that, when executed, causes the methods in any of the possible implementations of the first or second aspect to be implemented.

[0051] For example, the chip may include input circuitry or interface for transmitting information or data, and output circuitry or interface for receiving information or data.

[0052] Ninthly, a computer program product is provided. The computer program product includes: computer program code or instructions that, when executed, cause the method in any possible implementation of the first or second aspect to be implemented.

[0053] In a tenth aspect, a computer program is provided. When the computer program is run, it causes the method in any of the possible implementations of the first or second aspect to be implemented.

[0054] It should be understood that the beneficial effects of the third to tenth aspects mentioned above can be referred to the first or second aspects mentioned above and any possible implementation thereof, which will not be elaborated here. Attached Figure Description

[0055] Figure 1 is a schematic diagram of the architecture of the communication system used in the embodiments of this application;

[0056] Figure 2 is a schematic diagram of the access network equipment used in the embodiments of this application;

[0057] Figure 3 is a schematic diagram of a hybrid beamforming method provided in this application;

[0058] Figure 4 is a schematic diagram of a spatial beam index with 16 CSI-RS ports;

[0059] Figure 5 is a schematic diagram of signaling transmission during channel measurement between network devices and terminal devices.

[0060] Figure 6 is a flowchart illustrating a communication method provided in one embodiment of this application;

[0061] Figure 7 is a schematic block diagram of a communication device provided in one embodiment of this application;

[0062] Figure 8 is a schematic diagram of the structure of a communication device provided in another embodiment of this application. Detailed Implementation

[0063] To facilitate understanding of the above embodiments provided in this application, the following points are made:

[0064] 1) In this application, unless otherwise specified or in case of logical conflict, the terms and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0065] 2) In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and c can mean: a, or, b, or, c, or, a and b, or, a and c, or, b and c, or, a, b, and c. Here, a, b, and c can each be single or multiple.

[0066] 3) In this application, the terms "first," "second," and various numerical designations (e.g., #1, #2, etc.) indicate distinctions made for ease of description and are not intended to limit the scope of the embodiments of this application. For example, they may distinguish different messages, rather than describing a specific order or sequence. It should be understood that such descriptions can be interchanged where appropriate to describe solutions other than those in the embodiments of this application.

[0067] 4) In this application, descriptions such as “when…”, “under the circumstances of…” and “if” all refer to the fact that the device will make corresponding processing under certain objective circumstances. They are not time limits, nor do they require the device to make a judgment action when it is implemented, nor do they mean that there are other limitations.

[0068] 5) In this application, "instruction" or "for instruction" can include both direct and indirect instruction. When describing an instruction as being used to instruct A, it may include whether the instruction directly instructs A or indirectly instructs A, but does not necessarily mean that the instruction carries A.

[0069] The indication methods involved in the embodiments of this application should be understood to cover various methods that enable the party to be indicated to obtain the information to be indicated. The information to be indicated can be sent as a whole or divided into multiple sub-information and sent separately. Moreover, the sending period and / or sending time of these sub-information can be the same or different. This application does not limit the sending method, for example.

[0070] The "instruction information" in the embodiments of this application can be an explicit instruction, that is, a direct instruction through signaling, or an instruction obtained by combining other rules or parameters with the parameters indicated by the signaling, or by deduction. It can also be an implicit instruction, that is, an instruction obtained based on rules or relationships, or based on other parameters, or by deduction. This application does not specifically limit it in this regard.

[0071] 6) In this application, "protocol" can refer to a standard protocol in the field of communications, such as 5th generation (5G) protocols, new radio (NR) protocols, and related protocols applied to future communication systems. This application does not limit this term. "Predefined" can include predefined terms, such as protocol definitions. "Preconfiguration" can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device. This application does not limit the implementation method, for example.

[0072] 7) In this application, "communication" can also be described as "data transmission", "information transmission", "data processing", etc. "Transmission" includes "sending" and "receiving". "Transmission" can be described as "output".

[0073] 8) In this application, "sending information to XX (device)" can be understood as the destination of the information being that device. This can include sending information directly or indirectly to that device. "Receiving information from XX (device), or receiving information from XX (device)" can be understood as the source of the information being that device, and can include receiving information directly or indirectly from that device. Information may undergo necessary processing between the source and destination, such as format changes, but the destination can understand the valid information from the source.

[0074] 9) In this application, when comparing A and B, the description "when A is greater than or equal to B, execute method A; when A is less than or equal to B, execute method B" can be implemented in a way that is either "when A is greater than or equal to B, execute method A; or when A is less than B, execute method B" or "when A is greater than B, execute method A; or when A is less than or equal to B, execute method B". This application does not limit the implementation in this way. For ease of description, the implementation methods provided in this application are all illustrated using "when A is greater than or equal to B, execute method A; or when A is less than B, execute method B" as an example.

[0075] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0076] The technical solutions provided in this application can be applied to various communication systems, such as: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, sidelink (SL) communication systems, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, 5th Generation (5G) mobile communication systems, or new radio access technology (NR). Among these, 5G mobile communication systems can include non-standalone (NSA) and / or standalone (SA) networking. The technical solutions provided in this application can also be applied to future communication systems, etc. This application does not limit these applications.

[0077] Figure 1 is a schematic diagram of the architecture of the communication system applied in the embodiments of this application. Figure 1 shows a schematic diagram of a possible, non-limiting system architecture. As shown in Figure 1, the communication system 1000 includes a radio access network (RAN) 100 and a core network (CN) 200. RAN 100 includes at least one RAN node (110a and 110b in Figure 1, collectively referred to as 110) and at least one terminal device (120a-120j in Figure 1, collectively referred to as 120). RAN 100 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in Figure 1). Terminal device 120 is wirelessly connected to RAN node 110. RAN node 110 is wirelessly or wired connected to core network 200. The core network device in core network 200 and RAN node 110 in RAN 100 may be different physical devices, or they may be the same physical device integrating core network logical functions and radio access network logical functions.

[0078] RAN 100 can be a cellular system related to the 3rd Generation Partnership Project (3GPP), such as 4G, 5G mobile communication systems, or future-oriented evolution systems. RAN 100 can also be an open RAN (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (Wi-Fi) system. RAN 100 can also be a communication system that integrates two or more of the above systems.

[0079] RAN node 110, sometimes also referred to as access network equipment, RAN entity, or access node, is part of the communication system used to help terminal devices achieve wireless access. Multiple RAN nodes 110 in communication system 1000 can be of the same type or different types. In some scenarios, the roles of RAN node 110 and terminal device 120 are relative. For example, network element 120i in Figure 1 can be a helicopter or drone, which can be configured as a mobile base station. For terminal devices 120j accessing RAN 100 through network element 120i, network element 120i is a base station; but for base station 110a, network element 120i is a terminal device. RAN node 110 and terminal device 120 are sometimes both referred to as communication devices. For example, network elements 110a and 110b in Figure 1 can be understood as communication devices with base station functions, and network elements 120a-120j can be understood as communication devices with terminal functions.

[0080] In one possible scenario, a RAN node can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next-generation NodeB (gNB), a base station in a future mobile communication system, or an access node in a Wi-Fi system. A RAN node can be a macro base station (as shown in Figure 1, 110a), a micro base station or indoor station (as shown in Figure 1, 110b), a relay node or donor node, or a radio controller in a CRAN scenario. Optionally, a RAN node can also be a server, wearable device, vehicle, or in-vehicle equipment. For example, the access network equipment in vehicle-to-everything (V2X) technology can be a roadside unit (RSU).

[0081] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, with each RAN node performing a portion of the base station's functions. For example, RAN nodes can be central units (CUs), distributed units (DUs), CU-control planes (CU-CPs), CU-user planes (CU-UPs), or radio units (RUs). CUs and DUs can be separate entities or included in the same network element, such as a baseband unit (BBU). RUs can be included in radio frequency equipment or radio frequency units, such as remote radio units (RRUs), active antenna units (AAUs), or remote radio heads (RRHs).

[0082] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called an open-CU (open-CU, O-CU), DU can also be called an open-DU (open-DU, O-DU), CU-CP can also be called an open-CU-CP (open-CU-CP, O-CU-CP), CU-UP can also be called an open-CU-UP (open-CU-UP, O-CU-UP), and RU can also be called an open-RU (open-RU, O-RU). For ease of description, this application uses CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules.

[0083] Terminal devices can also be called terminals, user equipment (UE), mobile stations, mobile terminals, etc. They can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), the Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, and smart cities. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc.

[0084] In this embodiment of the application, the network device may be, for example, the RAN node 110 shown in FIG1, and the terminal device may be, for example, the terminal device 120 shown in FIG1. ​​Multiple network devices may transmit data or control signaling to a single terminal device at the same time. This application does not specifically limit the types of network devices and terminal devices.

[0085] In addition, terminal devices and network devices can be hardware devices, software functions running on dedicated hardware, software functions running on general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., a cloud platform), or entities that include dedicated or general-purpose hardware devices and software functions. This application does not limit the specific form of terminal devices and network devices.

[0086] Figure 2 is a schematic diagram of the access network device used in the embodiments of this application. As shown in Figure 2, the access network device includes one or more CUs, one or more DUs, and one or more RUs. For clarity, only one CU, DU, and RU are shown in Figure 2. The CU is used to connect to the core network and one or more DUs. Optionally, the CU may have some of the functions of the core network. The CU may include CU-CP and CU-UP.

[0087] The CU and DU can be configured according to the protocol layer functions of the wireless network they implement: for example, the CU can be configured to implement the functions of the Packet Data Convergence Protocol (PDCP) layer and above (such as the Radio Resource Control (RRC) layer and / or the Service Data Adaptation Protocol (SDAP) layer); the DU can be configured to implement the functions of the protocol layers below the PDCP layer (such as the Radio Link Control (RLC) layer, the Medium Access Control (MAC) layer, and / or the Physical (PHY) layer). Alternatively, the CU can be configured to implement the functions of the protocol layers above the PDCP layer (such as the RRC and / or SDAP layers), and the DU can be configured to implement the functions of the protocol layers below the PDCP layer (such as the RLC, MAC, and / or PHY layers).

[0088] When a CU includes CU-CP and CU-UP, CU-CP is used to implement the control plane functions of the CU, and CU-UP is used to implement the user plane functions of the CU. For example, when a CU is configured to implement the functions of the PDCP layer, RRC layer, and SDAP layer, CU-CP is used to implement the RRC layer functions and the control plane functions of the PDCP layer, and CU-UP is used to implement the SDAP layer functions and the user plane functions of the PDCP layer.

[0089] The CU-CP can interact with network elements in the core network used to implement control plane functions. These network elements can be access and mobility function (AMF) network elements, such as the AMF network element in a 5G system. The AMF network element is responsible for mobility management in the mobile network, such as terminal device location updates, terminal device registration with the network, and terminal device handover.

[0090] CU-UP can interact with network elements in the core network used to implement user plane functions. These network elements, such as the user plane function (UPF) network elements in a 5G system, are responsible for forwarding and receiving data in terminal devices.

[0091] The above CU and DU configurations are merely examples; the functions of the CU and DU can be configured as needed. For instance, the CU or DU can be configured to have more protocol layer functions, or only some protocol layer processing functions. For example, some RLC layer functions and protocol layer functions above the RLC layer can be placed in the CU, while the remaining RLC layer functions and protocol layer functions below the RLC layer can be placed in the DU. Furthermore, the functions of the CU or DU can be divided according to service type or other system requirements, such as by latency. Functions that require low latency can be placed in the DU, while functions that do not require low latency can be placed in the CU.

[0092] DU and RU can cooperate to implement the functions of the PHY layer. A DU can be connected to one or more RUs. The functions of DU and RU can be configured in various ways depending on the design. For example, a DU can be configured to implement baseband functions, and an RU can be configured to implement mid-RF functions. Another example is that a DU can be configured to implement higher-level functions in the PHY layer, and an RU can be configured to implement lower-level functions in the PHY layer, or to implement both lower-level and RF functions. Higher-level functions in the physical layer can include a portion of the physical layer's functions that are closer to the MAC layer, while lower-level functions in the physical layer can include another portion of the physical layer's functions that are closer to the mid-RF side.

[0093] To facilitate understanding of the embodiments of this application, the technical terms related to this application are explained below.

[0094] 1. Antenna Port: An antenna port is a logical concept; there is no direct correspondence between an antenna port and a physical antenna. An antenna port is typically associated with a reference signal, and its meaning can be understood as a transmit / receive interface on the channel through which the reference signal passes. For low-frequency systems, an antenna port may correspond to one or more antenna elements that jointly transmit the reference signal. The receiver can treat them as a whole without distinguishing between individual elements. For high-frequency systems, an antenna port may correspond to a beam; similarly, the receiver only needs to treat this beam as an interface and does not need to distinguish between individual elements.

[0095] In this embodiment of the application, the antenna port that transmits the analog beam can be referred to as the analog antenna port, or simply as the antenna port.

[0096] The port group mentioned in the embodiments of this application can be multiple digital ports corresponding to the same analog beam, or a port group can be a set of multiple digital ports corresponding to multiple analog beams, or the digital ports corresponding to the same analog beam are divided into multiple subsets, each subset being a port group. This port group may also be called a digital-analog port group, etc.

[0097] 2. Beam: A beam is a communication resource. Beams can be wide beams, narrow beams, or other types of beams. The technology that forms beams is called beamforming technology. Beamforming technology refers to adjusting the amplitude and / or phase of a signal so that the radiated signal through an antenna array has a certain directionality, enabling higher antenna array gain. The main lobe of the antenna array's radiation pattern can be called the beam.

[0098] In beamforming technology, the amplitude and / or phase of a signal are adjusted after being filtered by a spatial domain transmission filter. Different spatial domain transmission filters using different spatial filtering parameters can achieve beams in different directions. In the embodiments of this application, the spatial filtering parameters can be replaced by beams, or the spatial filtering parameters can be replaced by spatial domain transmission filters. Spatial domain transmission filters can also be called spatial filters.

[0099] Specifically, beamforming technology includes digital beamforming (DBF), analog beamforming (ABF), and hybrid digital-analog beamforming (HBF). DBF technology features multiple digital processing channels, each adjusting the phase (or amplitude and phase) of the signal in the digital domain to give the radiated signal directionality. Therefore, DBF technology can achieve the function of a spatial transmission filter through multiple digital processing channels. ABF technology transmits signals simultaneously using an antenna array composed of multiple antenna elements, with each element corresponding to a phase shifter. By adjusting the phase of the phase shifter corresponding to each antenna element, the radiated signal directionality is achieved. Therefore, ABF technology can achieve the function of a spatial transmission filter through multiple phase shifters corresponding to multiple elements in the antenna array. HBF technology is a combination of ABF and DBF technologies, incorporating both multiple digital processing channels and multiple analog phase shifters. Therefore, for hybrid beamforming technology, the function of the aforementioned spatial transmission filter can be achieved through multiple phase shifters corresponding to multiple array elements in the antenna array and multiple digital processing channels. However, this application is not limited to this; the aforementioned spatial transmission filter can also be implemented through other technologies.

[0100] It is understandable that one or more antenna ports that form a beam can be regarded as a set of antenna ports or a group of antenna ports. For ease of description, the following text will uniformly refer to a beam as being formed by one antenna port, and one or more digital ports that form a beam as a group of ports.

[0101] In one implementation, multiple digital channels are digitally weighted in the same way across the entire frequency band, which has an effect similar to analog beamforming.

[0102] In another implementation, the digital channels (or digital weighting) can be divided into multiple levels. The first level performs digital weighting across the entire frequency band, and the second level performs weighting for sub-bands. The effect is equivalent to hybrid beamforming. For ease of understanding, Figure 3 shows a schematic diagram of hybrid beamforming (or digital beamforming). One approach, as shown in Figure 3, involves uniformly dividing the digital channels into K1 groups (K1 being a positive integer) (or, K1 subarrays, K1 port groups). Each group (or subarray, port group) contains the same number of digital channels, for example, K2 (K2 being a positive integer). Digital beamforming and analog beamforming can be considered as two-stage beamforming. The first-stage beamforming is analog beamforming, and the weights for the first-stage beamforming are W0 = [W 0,0 W 0,1 … W 0,K2-1 The K2 elements correspond to K2 digital channels. The weights for the first-stage beamforming are broadband, and all groups use the same first-stage weight, W0. The second-stage beamforming is digital beamforming, and its weights are W1 = [W 1,0 W 1,1 … W 0,K1-1 The K1 elements in this matrix correspond to K1 digital channels. The weights for the second-level beamforming are sub-band weights; the second-level weights differ between different groups (or subarrays, port groups), meaning the weight matrix corresponding to each digital channel is... or in, This represents the Kronecker product, as shown in Figure 3. This represents the weighting vector corresponding to the first-level weights. As can be seen, different weighting vectors result in different beam directions. Therefore, network devices can adjust the beam direction by adjusting the weighting vectors.

[0103] 3. Reference signal: can be used for channel measurement, channel estimation, or beam quality monitoring, etc. According to LTE or NR protocols, uplink reference signals may include, for example, a sounding reference signal (SRS), a physical uplink control channel (PUCCH)-demodulation reference signal (DMRS), a physical uplink share channel (PUSCH)-demodulation reference signal (PUSCH-DMRS), a phase tracking reference signal (PTRS), an uplink positioning signal, etc.; downlink reference signals may include, for example, a synchronization signal block (SSB), a physical downlink control channel (PDCCH)-demodulation reference signal (PDCCH-DMRS), a physical downlink share channel (PDSCH)-demodulation reference signal (PDSCH-DMRS), PTRS, a channel status information reference signal (CSI-RS), a cell reference signal (CRS) in LTE, and a time / frequency domain tracking synchronization signal (TRS) in NR. downlink positioning signal (TRS), downlink positioning signal (positioning RS), etc.

[0104] The reference signal in the embodiments of this application is mainly used for channel measurement. For example, it may refer to the CSI-RS used in downlink channel measurement, the SRS used in uplink channel measurement, or other reference signals that can be used for channel measurement. This application does not limit this.

[0105] A specific application scenario is illustrated below: In frequency division duplex (FDD) communication, since uplink and downlink channels lack reciprocity or cannot guarantee reciprocity, network devices typically send CSI-RS to terminal devices. The terminal devices measure the downlink channel CSI based on the received CSI-RS and feed it back to the network device. The network device can then use this CSI to determine the resources, modulation and coding scheme (MCS), and precoding configurations for scheduling the downlink data channel of the terminal device.

[0106] For example, CSI may include at least one of the following: precoding matrix indicator (PMI), channel quality indicator (CQI), rank indicator (RI), and channel state information reference signal resource indicator (CSI-RS resource indicator, CRI), layer indicator (LI), reference signal received power (RSRP), synchronization signal / physical broadcast channel block resource indicator (SSBRI), etc.

[0107] Where RI is the rank of the channel matrix, reflecting the maximum number of downlink data streams allowed under the current channel conditions. LI is the data transmission layer. The specific quantities in the CSI feedback from the terminal device can be determined according to the configuration, as shown in "CSI-ReportConfig" below.

[0108] Precoding and Codebook: In multiple-input multiple-output (MIMO) communication systems, the mathematical expression for communication is y = Hx + n, where y is the received signal, H is the MIMO channel, x is the transmitted signal, and n is noise. In communication systems with multiple antennas, signals from multiple transmit antennas can be superimposed on any one receive antenna. Therefore, the method of transmitting signals at the transmitter affects system performance, and recovering the transmitted signal at the receiver is often complex. In this context, precoding is used to reduce system overhead and maximize the system capacity of MIMO, while also reducing the complexity of eliminating inter-channel interference in the receiver. In this case, the mathematical expression is y = HPx + n, where P is the precoding matrix (or vector). To simplify implementation complexity, P can be selected from a predefined set of matrices (or vectors), called the codebook. This method is also known as the codebook-based transmission method.

[0109] The codebook includes PMI indices and precoding matrices, with each PMI corresponding to a precoding matrix. The corresponding precoding matrix can be determined based on the PMIs fed back from the CSI. For the 3GPP "Release 15" protocol, in type I codebook feedback, the precoding matrix corresponding to one transport layer and one subband to be fed back can be represented as W: W = W1W2, where the dimension of W is P. CSI-RS ×N3, W1 is a wideband precoding matrix with dimension P. CSI-RS ×2L, W2 is the subband precoding matrix with dimensions 2L×N3. P CSI-RS N3 represents the number of CSI-RS ports, N3 represents the number of subbands or PMIs, and L represents the number of transmitted data streams. PMIs can specifically include feedback to precoding matrices for different transport layers and subbands.

[0110] When the number of CSI-RS ports is less than or equal to 2, the codebook feedback parameters (including codebook index and layer / stream number) are as follows:

[0111] Table 1

[0112] When the number of CSI-RS ports is greater than 2, the number of precoding matrices, i.e. the number of weights, in the codebook will increase geometrically with the number of CSI-RS ports and layers. Therefore, the codebook is no longer suitable to be listed in the form of enumeration. Instead, it is generated according to certain rules based on the relevant parameter configuration. In other words, the codebook can be determined based on the relevant parameter configuration.

[0113] Taking a type I codebook as an example, when codebookmode=1, the codebook can be determined according to the following three steps: 1. Determine the spatial beam set, that is, the set of all values ​​in a codebook; 2. Select the wideband beam group, that is, determine the wideband precoding matrix W1; 3. Beam selection and phase quantization adjustment, that is, determine the subband precoding matrix W2.

[0114] The spatial beam set is determined by the parameter configuration in Table 2:

[0115] Table 2

[0116] In Table 2, N1 represents the number of logical antenna ports in a certain direction of the same polarization, generally referring to the horizontal direction; N2 represents the number of logical antenna ports in another direction of the same polarization, generally referring to the vertical direction; O1 represents the oversampling factor of the Discrete Fourier Transform (DFT) in the direction of N1 (horizontal direction); O2 represents the oversampling factor of the DFT in the direction of N2 (vertical direction).

[0117] As shown in Table 2, with P CSI-RS Taking 16 as an example, for the same level of logical antenna ports, the possible combinations in the horizontal and vertical directions are only (4, 2) and (8, 1) as shown in the table above. When N1 is 4 and N2 is 2, it means that during beamforming, a total of N1×N2 weight vectors with a horizontal dimension of 4 and a vertical dimension of 2 can be formed. These weight vectors are orthogonal to each other, meaning that the beams formed by weighting these weight vectors do not interfere with each other.

[0118] The physical significance of O1 and O2 lies in the fact that DFT oversampling increases the number of weight vectors in the horizontal and vertical directions, thus generating more weight vectors. The values ​​of O1 and O2 also determine the beam density in the horizontal and vertical directions when the antenna configuration is fixed, i.e., when N1 and N2 are determined. The larger the values ​​of O1 and O2, the smaller the beam step size and the higher the accuracy during beam scanning. However, the trade-off is that the weight vectors are no longer orthogonal, meaning that there is interference between the beams formed after weighting these weight vectors.

[0119] Figure 4 is a schematic diagram of a spatial beam index with 16 CSI-RS ports. As shown in Figure 4, (N1, N2) takes the value (4, 2), so the formed spatial beam has a horizontal dimension of 4 and a vertical dimension of 2. (O1, O2) takes the value (4, 4), and each dot corresponds to a DFT oversampled weight vector. Since beams in different directions can be formed by weighting with different weight vectors, each dot in Figure 4 corresponds to a different DFT beam. Among them, the weight vectors corresponding to the black dots are orthogonal to each other, that is, the DFT beams corresponding to the black dots do not interfere with each other; while the weight vectors corresponding to the black dots and the shaded dots are no longer orthogonal, that is, there is some interference between the DFT beams corresponding to the black dots and the shaded dots.

[0120] As shown in Figure 4, the oversampled DFT beam index can be determined based on the position of each dot in the horizontal and vertical directions. l represents the DFT beam index in the horizontal direction, and m represents the DFT beam index in the vertical direction. For example, (l, m) = (0, 0) is used to indicate the DFT beam corresponding to the dot marked "1" in the spatial beams shown in Figure 4.

[0121] The broadband precoding matrix W1 is formed by oversampling the DFT matrix, that is, the DFT matrix is ​​oversampled in space to obtain the beamforming weights of the required precision. The weight vectors of the l-th and m-th beams corresponding to the horizontal and vertical directions satisfy the following expression:

[0122] Among them, v l Let l be the weight vector in the horizontal direction, and its length is N1. The number of weight vectors in the horizontal direction is determined by the number of values ​​that l can take; that is, l also represents the weights selected in the horizontal direction.

[0123] u m Let m be the weight vector in the vertical direction, and its length is N². The number of vectors in the vertical direction is determined by the number of possible values ​​for m, meaning that m also represents the weights chosen in the vertical direction.

[0124] After confirming the weight sets in the horizontal and vertical directions, the selected weight set is determined. (This is achieved through v...) l and u m The Kronecker product represents only the weighting result for one set of polarized antennas. Typically, the other set of polarized antennas will have a certain phase deviation, determined by W2. Therefore, the final expression of W1 is v. l and u m The form of the second sub-block diagonal matrix in the Kronecker product.

[0125] The weight vector of the (l, m)th beam satisfies the following expression:

[0126] Based on the above expression, by calculating all possible values ​​of l and m, the beam corresponding to W1 can be determined. The beam corresponding to W1 may fall into two categories:

[0127] (1) Multiple oversampled DFT beams, and no two beams are orthogonal to each other, with the whole structure revolving around v. l,m express;

[0128] (2) Multiple orthogonal DFT beams, through v l,m v l′,m′ v l″,m″ ...to distinguish between multiple beams.

[0129] Accordingly, W1 satisfies the following expression:

[0130] Where N represents the number of CSI-RS ports and L represents the number of streams. This represents the power normalization coefficient, which ensures that the total power at the antenna ports remains constant before and after beamforming weighting. The number of ports in CSI-RS is the same as the number of rows in the wideband precoding matrix W1, and is v l,m Double the number of rows; the non-zero diagonal block in the top left corner of W1, i.e., v l,m v l′,m′ In the column vector group formed by ..., each column represents the beam in a specific direction of the same polarized antenna.

[0131] When the number of CSI-RS ports is greater than 2, the PMI index includes a wideband indicator i1 and a subband indicator i2. The wideband indicator i1 is a composite index, and its basic definition is as follows:

[0132] Among them, i 1,1 The horizontal coordinate position of the first DFT beam fed back by the terminal device in the spatial beam index diagram shown in Figure 4 is equivalent to the aforementioned horizontal index l; i 1,2 This represents the vertical coordinate position of the DFT beam in the spatial beam index diagram shown in Figure 4, equivalent to the aforementioned vertical index m; i 1,3 i is the offset of another DFT beam fed back by the terminal device relative to the first DFT beam. 1,3 This includes offsets in the horizontal and vertical directions; L represents the number of layers. It should be noted that in the codebook of type I, the number of streams and the number of layers correspond to the same value.

[0133] When the number of layers L is 2, i 1,3The offsets in the horizontal and vertical directions can be selected according to Table 3.

[0134] Table 3

[0135] In Table 3, the value corresponding to k1 is the horizontal offset of the other DFT beam relative to the first DFT beam, and the value corresponding to k2 is the vertical offset of the other DFT beam relative to the first DFT beam.

[0136] When the number of layers L is 3 or 4, and the number of CSI-RS ports is less than 16, i 1,3 The offsets in the horizontal and vertical directions can be selected according to Table 4.

[0137] Table 4

[0138] Understandably, for each CSI-RS resource, the terminal device needs to determine the autocorrelation covariance matrix R of its corresponding frequency domain channel coefficients. hh DFT beams are selected from the spatial beam set to determine the broadband precoding matrix W1.

[0139] The subband precoding matrix W2 is used to perform phase difference quantization and adjustment on the weights of another set of polarized antennas. The subband indicator i2 fed back by the terminal device corresponds to W2. With codebookmode=1, when the layer number L is 1, the PMI content fed back by the terminal device to the network device is shown in Table 5:

[0140] Table 5

[0141] in, That is, the precoding matrix determined based on the wideband precoding matrix W1 and the subband precoding matrix W2 when the number of layers L is 1. Specifically, P CSI-RS The number of CSI-RS ports, based on i1 fed back by the terminal device, includes i. 1,1 and i 1,2 The horizontal index l and vertical index m of the DFT beam in the spatial beam index diagram can be determined, thereby determining the weight vector of the (l, m)th beam. n represents the value corresponding to i2 fed back by the terminal device.

[0142] With codebookmode=1, when the layer number v is 2, the PMI content fed back by the terminal device to the network device is shown in Table 6:

[0143] Table 6

[0144] in, That is, the precoding matrix determined based on the wideband precoding matrix W1 and the subband precoding matrix W2 when the number of layers L is 2. k1 and k2 are i in Table 3. 1,3 Including the offsets in the horizontal and vertical directions, v l′,m′ Used to indicate a distinction from v l,m The orthogonal DFT beams are used, and the other parameters are the same as those in Table 5, so they will not be repeated here.

[0145] With codebookmode=1-2, when the number of layers L is 3 and the number of CSI-RS ports is less than 16, the PMI content fed back by the terminal device to the network device is shown in Table 7:

[0146] Table 7

[0147] in, That is, when the number of layers L is 3 and the number of CSI-RS ports is less than 16, the precoding matrix is ​​determined based on the wideband precoding matrix W1 and the subband precoding matrix W2. k1 and k2 are i in Table 4. 1,3 The parameters include the horizontal and vertical offsets, and the remaining parameters are the same as those in Tables 5 and 6, so they will not be repeated here.

[0148] When the number of layers L and the number of CSI-RS ports are other possible values, the specific method for determining the precoding matrix can be found in the relevant content of 3GPP technical specification (TS) 38.214, which will not be elaborated here.

[0149] The PMI matrix corresponding to Release 16 codebook can be equivalently represented as: The dimension of W is P CSI-RS ×N3, the dimension of W1 is P CSI-RS ×2L (or a wideband precoding matrix), The dimension is 2L×N3 (corresponding to W2 in Release 15, which is the precoding matrix of each subband). The dimension is 2L×M (or the compressed matrix). The dimension is M×N3 (which is the M row of the dimension N3×N3 inverse discrete fourier transform (IDFT) matrix, i.e., the dimension N3×N3 DFT matrix W). f (the conjugate of column M in the text), where P CSI-RS For the number of CSI-RS ports, The number of IDFT basis vectors is selected, and N3 is the number of subbands (or the number of PMIs) for PMI feedback. During final feedback, only the W1-related port or DFT codebook information needs to be fed back. Related IDFT substrate selection information, The non-zero element in the equation. For more details, please refer to 38.214, which will not be elaborated here.

[0150] In Release 16, with the DFT-based Enhanced Type II Codebook, the corresponding codebook parameter combinations are configured as shown in Table 8 below. Where L represents the number of bases selected for each polarization, and p... υ Choose a scale for each IDFT basis, where β is the non-zero scale and υ is the rank.

[0151] Table 8

[0152] In Release 16, based on the Enhanced Type II Port Selection Codebook, the corresponding codebook parameter combinations are configured as shown in Table 9 below. Where L represents the number of substrates selected for each polarization, p... υ Choose a scale for each IDFT basis, where β is the non-zero scale and υ is the rank.

[0153] Table 9

[0154] 4. Reference Signal Resources: These can be used to configure the transmission attributes of reference signals, such as time-frequency resource location, port mapping relationships, power factors, and scrambling codes. For details, refer to the relevant sections on reference signal resources in 3GPP TS 38.211 and 38.331. Transmitting devices can transmit reference signals based on reference signal resources, and receiving devices can receive reference signals based on reference signal resources.

[0155] It should be noted that when a simulated beam corresponds to the resources of multiple reference signals, for that simulated beam, the terminal device measures the resources of the multiple reference signals corresponding to it, and only selects the CSI corresponding to the resources of one of the reference signals to report.

[0156] For ease of explanation, the resources of the above reference signals will be referred to as resources in the following text.

[0157] 5. Reference Signal Configuration: Reference signal configuration can be divided into two parts: reference signal resource configuration and reference signal reporting configuration. The following section uses CSI-RS configuration as an example.

[0158] The two most important parts of the CSI-RS configuration are "CSI-ReportConfig" and "CSI-ResourceConfig". It is understood that "CSI-ReportConfig" and "CSI-ResourceConfig" are names used for ease of description only, and other names may be used; this application does not impose any restrictions on this.

[0159] The "CSI-ReportConfig" configuration allows you to set parameters related to CSI reporting, such as "Report Configuration Id," "Report Configuration Type," and "Report Quantity." "ReportConfigId" identifies a "CSI-ReportConfig," meaning one "ReportConfigId" corresponds to one "CSI-ReportConfig." "ReportConfigType" configures the reporting type, which can be periodic, semi-persistent, or aperiodic. "ReportQuantity" configures the reported information, including CRI, PMI, RI, LI, CQI, RSRP, reference signal received quality (RSRQ), signal-to-noise ratio (SNR), and signal-to-interference-plus-noise ratio (SINR). Different configurations allow you to report different information.

[0160] "CSI-ResourceConfig" can be used to configure information related to CSI-RS resources, such as the "CSI Resource Configuration Identifier (CSI-ResourceConfigId)" and the CSI-RS resources used for measurement. "CSI-ResourceConfigId" is the identifier for the "CSI Resource Configuration (CSI-ResourceConfig)," used to identify that "CSI-ResourceConfig," and this variable can be associated with "CSI-ReportConfig."

[0161] For example, through the three-level high-level parameters “CSI-ResourceConfig”-“CSI-RS Resource Set (CSI-RS-ResourceSet)”-“CSI-RS-Resource”, the network device can configure one or more CSI-RS resource sets for each terminal device, and each CSI-RS resource set includes one or more CSI-RS resources.

[0162] Each CSI-RS resource can be identified by a "CSI-RS Resource Id". The identifiers of CSI-RS resources within a CSI-RS resource set are not necessarily sequential. For example, if the identifiers (e.g., CSI-RS-ResourceIds) of resources in a CSI-RS resource set, ordered by beam index, include {002, 004, 008, 003, 005}, where 002 corresponds to resource index 0, 004 to resource index 1, 008 to resource index 2, 003 to resource index 3, and 005 to resource index 4, then the resource index is used to indicate the transmission order of the CSI-RS resources. It should be understood that the resource index is merely an exemplary naming convention.

[0163] When the terminal device reports measurements based on the above configuration, the CRI in the CSI is used to indicate the resources in the current measurement CSI-RS resource set. For example, if the CSI-RS resource set is configured with K... s >1 CSI-RS resource, where CRI k (k is greater than or equal to 0) corresponds to the (k+1)th CSI-RS resource in the CSI-RS resource set for channel measurement, where k can be the value of CRI, or k can be the index of the resource indicated by CRI.

[0164] Table 10 shows the format of some fields in the measurement report information.

[0165] Table 10

[0166] As shown in Table 10, the CRI field carries the CRI, which indicates the CSI-RS resource to be reported, and its length is [length missing]. This indicates the number of CSI-RS resources in resource set s. This indicates rounding up. The SSBRI field carries the SSBRI, which indicates the SSB resource to be reported (such as the resource identifier), and its length is [length missing]. This indicates the number of SSB resources in resource set s. Terminal devices can report one or more of the following: CRI or SSBRI.

[0167] RSRP can be reported differentially. For the maximum value of RSRP, its absolute value can be reported using 7-bit quantization, as shown in the RSRP field in the table. The RSRP indicated by this field corresponds to the reference signal resource corresponding to the reference signal with the highest received power. Other RSRPs can be reported using 4-bit quantization, as shown in the differential RSRP field in the table.

[0168] The above text uses reported quantities such as PMI, CRI, SSBRI, and RSRP as examples to provide a simple explanation of the measurement results, but this should not constitute any limitation on this application. This application does not limit the specific content included in the measurement results or their indication methods.

[0169] In the embodiments of this application, CSI can be carried in uplink control information (UCI) and transmitted through the physical uplink control channel (PUCCH) or the physical uplink shared channel (PUSCH).

[0170] In the HBF architecture, one analog beam corresponds to one or more reference signal resources (such as CSI-RS resources), and one reference signal resource is used to transmit one reference signal. Network devices can communicate with terminal devices through different analog beams. The quality of the communication signal is better only when the analog beams are aligned with the communication target. The process of selecting an analog beam from multiple different analog beams is called beam scanning or beam training. Considering that network devices can adjust the beam direction by adjusting the weighting vector, an exemplary beam scanning method is as follows: the network device sends multiple reference signals to the terminal device through analog beams in different directions. The terminal device measures the resources (such as CSI-RS resources) of the multiple reference signals and reports the corresponding CSI values. Based on the CSI feedback from the terminal device, the analog beam with the highest performance suitability can be determined from the multiple analog beams.

[0171] It should be noted that when a simulated beam corresponds to the resources of multiple reference signals, for that simulated beam, the terminal device measures the resources of the multiple reference signals corresponding to it, and only selects the CSI corresponding to the resources of one of the reference signals to report.

[0172] For ease of explanation, the resources of the above reference signals will be referred to as resources in the following text.

[0173] Figure 5 illustrates the signaling transmission between the network device and the terminal device during channel measurement. As shown in Figure 5, the network device sends Ks CSI-RS resources to the terminal device in a time-division multiplexing manner. After receiving multiple CSI-RS resources, the terminal device determines the CSI report CSI#0 based on CSI-RS resources #0 to #(M-1) among the Ks CSI-RS resources and sends the CSI report CSI#0 back to the network device. M and Ks are integers greater than 1, where 1 ≤ M ≤ Ks.

[0174] Besides CSI-RS shown in Figure 5, the types of the M reference signals mentioned above can also include SSB, PDCCH-DMRS, PDSCH-DMRS, PTRS, CRS in LTE, TRS in NR, downlink positioning signals, etc. For ease of understanding, CSI-RS will be used as an example of a reference signal in the following description.

[0175] In some implementations, M CSI-RS correspond one-to-one with M resources, and the terminal device can measure each CSI-RS to obtain the corresponding CSI parameters. As an example, when a network device transmits CSI-RS through the M CSI-RS resources, it first needs to configure the CSI-RS resources using reference signal resource configuration information. Based on this information, the terminal device can determine the CRI corresponding to each of the M CSI-RS resources.

[0176] In some implementations, after determining the RI corresponding to CSI-RS, the terminal device can calculate the PMI corresponding to CSI-RS based on the protocol, according to the description of PMI in the aforementioned codebook determination process. This will not be elaborated further here. It should be noted that, depending on the CSI reporting format, PMI can be divided into broadband PMI and / or subband PMI. Broadband PMI is the PMI for the entire bandwidth corresponding to the CSI-RS resource. Broadband PMI includes broadband information fields X1 and / or X2. Broadband information field X1 is the indicator i1 in the PMI index, and broadband information field X2 is the i2 corresponding to the entire bandwidth. Alternatively, the entire bandwidth corresponding to the CSI-RS resource can be divided into multiple subbands. The PMI corresponding to each subband is called the subband PMI. The subband PMI includes a subband information field X2, which is the i2 corresponding to each of the multiple subbands.

[0177] In some implementations, the terminal device can measure the SINR of the channel corresponding to CSI-RS by calculating the RI and PMI, and then quantize it to obtain the CQI sequence. Furthermore, according to 3GPP TS 38.211, the modulation and coding scheme (MCS) corresponding to the CQI sequence can be found.

[0178] In some implementations, based on the above CRI, RI, PMI, and CQI, the terminal device can calculate the LI corresponding to each of the M CSI-RS resources.

[0179] Correspondingly, the terminal device reports the CSI parameters corresponding to the above M CSI-RS resources. The CSI corresponding to the M resources may include one or more of the following fields: M CRI, RI, the wideband CQI of the first transport block (TB), the subband differential CQI of the first TB, the wideband CQI of the second TB, the subband differential CQI of the second TB, LI, the PMI wideband information field X1, the PMI wideband information field X2, and the PMI subband information field X2.

[0180] When the PMI in the CSI field uses a type I codebook, the format of the CSI corresponding to the M resources corresponds to the type I codebook, which can be specifically referred to as shown in Table 11 below.

[0181] Table 11

[0182] As shown in Table 11, the report number of the CSI corresponding to the M resources is #0. The CSI report #0 can be divided into two parts: part 1 and part 2. Among them, part 1 includes the following fields: M CRI, RI, the wideband CQI of the first TB, and the subband differential CQI of the first TB.

[0183] The M CRI in Table 11 are indicated in the form of CRI k0, CRI k1, …, CRI k m , …, CRI k M-1 where k m and m are integers. k m is used to indicate the index of the Ks resources configured for the CSI-RS resource set. The corresponding value of k m is 0 ≤ k m < Ks, and the corresponding value of m is 0 ≤ m < M.

[0184] Part 2 supports two forms of reporting: wideband reporting and subband reporting. Wideband reporting means measuring only one value on the entire configured bandwidth and reporting it. The reported value represents the entire frequency bandwidth. Subband reporting means dividing the entire configured bandwidth into multiple subbands, measuring one value on each subband and reporting it. Each reported value represents only a specific bandwidth segment.

[0185] The second part of the broadband format shown in Table 11 includes the following fields: the second TB broadband CQI, LI, PMI broadband information field X1, and PMI broadband information field X2. Among them, PMI broadband information field X1 and PMI broadband information field X2 correspond to broadband PMI.

[0186] The second part (part 2) of the subband format shown in Table 11 includes the following fields: subband differential CQI of the second TB, PMI subband information field X2, where PMI subband information field X2 corresponds to subband PMI.

[0187] It should be noted that when dividing the entire bandwidth configuration into multiple subbands and numbering them, the subbands can be classified according to the parity of their numerical numbers. Subbands with odd numerical numbers are called odd subbands, and subbands with even numerical numbers are called even subbands. Therefore, the subband differential CQI of the second TB in Table 11 can be divided into odd subbands and even subbands. The subband differential CQI of the second TB corresponding to the M even subbands corresponds one-to-one with the M CSI-RS resources, and the subband differential CQI of the second TB corresponding to the M odd subbands corresponds one-to-one with the M CSI-RS resources.

[0188] Similarly, the PMI subband information field X2 in Table 11 can also be divided into odd-numbered subbands and even-numbered subbands. The PMI subband information field X2 corresponding to the M even-numbered subbands corresponds one-to-one with the M CSI-RS resources, and the PMI subband information field X2 corresponding to the M odd-numbered subbands corresponds one-to-one with the M CSI-RS resources.

[0189] It should be noted that the top-to-bottom arrangement of the CSI fields in Table 11 represents the order of the CSI fields in CSI report #0. When one CSI parameter corresponding to M resources corresponds one-to-one with M CSI-RS resources, for the same CSI parameter, the order of the CSI fields corresponding to the M resources is arranged according to the CRI number order corresponding to each CSI-RS resource. For example, in the first part (part 1) of the first CSI report corresponding to the M resources shown in Table 11, when reporting M CRIs, the order of the corresponding CSI fields from front to back is CRI k0, CRI k1, CRI k2, ..., CRI k K-1 .

[0190] When the PMI in the CSI field adopts a Type II codebook (e.g., R16 Enhanced Type II Codebook), the format of the CSI corresponding to the M resources corresponds to the codebook of R16 Enhanced Type II Codebook, as shown in Table 12 below.

[0191] Table 12

[0192] As shown in Table 12, the report number of the CSI corresponding to the M resources is #n. The fields in the CSI report #n can be divided into a first part (part 1) and a second part (part 2). Or rather, each channel state information includes two parts. The first part (part 1) includes the following fields: CRI, RI, the wideband CQI of the first transport block (TB), the subband differential CQI of the first TB, the selected L value, the indication of the selected L n value combination, and the indicator K of the sum of non-zero coefficients of all layers corresponding to all CRIs NZ , and the indicator K of the sum of non-zero coefficients of all layers corresponding to a single CRI NZ .

[0193] The M CRIs in Table 11 are indicated in the form of CRI k0, CRI k1, …, CRI k m , …, CRI k M-1 , where k m and m are integers. k m is used to indicate the index of the Ks resources configured for the CSI-RS resource set, and the corresponding value of k m is 0 ≤ k m < Ks, and the corresponding value of m is 0 ≤ m < M.

[0194] The second part (part 2) supports two forms: wideband reporting and subband reporting. Wideband reporting means measuring only one value over the entire configured bandwidth and reporting it, and the reported value represents the entire frequency bandwidth. Subband reporting means dividing the entire configured bandwidth into multiple subbands, measuring one value on each subband and reporting it, and each reported value represents only a specific bandwidth segment.

[0195] The second part (part 2) in the wideband form shown in Table 12 can include one or more of the following 3 groups. Among them,

[0196] Group 0 includes the PMI field X1, specifically including one or more of the following fields: i 1,1 , i 1,2 , i 1,8,l , where l = 1, …, v.

[0197] Group 1 includes a part of the PMI field X2, specifically including one or more of the following fields: i 2,3,l , i 1,5 , i 1,6,l , i 1,9,{i 2,4,l} l＝1,…,υ ,{i 2,5,l} l＝1,…,υ ,{i 1,7,l} l＝1,…,υ , where l=1,…,v.

[0198] Group 2 includes a portion of the PMI field X2, specifically including one or more of the following fields {i 2,4,l} l＝1,…,υ ,{i 2,5,l} l＝1,…,υ ,{i 1,7,l} l＝1,…,υ , where l=1,…,v.

[0199] It should be noted that the top-to-bottom arrangement of the CSI fields in Table 12 represents the order of the CSI fields in CSI report #n. When one CSI parameter corresponding to M resources corresponds one-to-one with M CSI-RS resources, for the same CSI parameter, the order of the CSI fields corresponding to the M resources is arranged according to the CRI number order corresponding to each CSI-RS resource. For example, in the first part (part 1) of the first CSI report corresponding to M resources shown in Table 12, when reporting M CRIs, the order of the corresponding CSI fields from front to back is CRI k0, CRI k1, CRI k2, ..., CRI k K-1 .

[0200] When current terminal devices feed back multiple channel status information corresponding to multiple beams, they can use codebooks of various precisions. That is, some beams use high-precision codebooks and some beams use low-precision codebooks. Channel status information corresponding to different codebook precisions can be fed back in the same channel status information report. However, when the number of analog beams increases, there may be a shortage of reporting resources or reporting conflicts during the CSI reporting process, which will lead to a decrease in feedback quality.

[0201] To address the aforementioned technical issues, this application provides a communication method and apparatus designed to optimize the arrangement order of CSI fields and define the priority of multiple sets of CSI measurement results reported in the same CSI report. This enables terminal devices to report CSI measurement results corresponding to beams with high codebook accuracy even when uplink resources are limited, thereby improving the quality of CSI feedback.

[0202] The communication method provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings, and can be applied to the communication system shown in Figure 1 above.

[0203] It should be understood that the embodiments of this application can be applied to communication scenarios involving communication between the terminal side and the network side. For example, the network side may include network devices, CUs or DUs within the network devices, or modules (e.g., circuits, chips, or chip systems) within the network devices, or logical nodes, logical modules, or software capable of implementing all or part of the functions of the access network device. The terminal side may include terminal devices, communication modules within the terminal devices, or circuits or chips (such as modem chips, also known as baseband chips, or system-on-a-chip (SoC) chips including modem cores, or system-in-package (SIP) chips) within the terminal devices responsible for communication functions, or logical nodes, logical modules, or software capable of implementing all or part of the functions of the access network device. For ease of description, the following communication methods are described using network devices and terminal devices as the execution entities. When the terminal side is another node, chip, circuit, or entity, or when the network side is another node, chip, circuit, or entity, the corresponding specific implementation is similar and will not be repeated.

[0204] Figure 6 is a flowchart illustrating a channel state information feedback method provided in an embodiment of this application. As shown in Figure 6, the method 600 includes the following steps S601 to S603.

[0205] S601, the network device sends Ks reference signals to the terminal device, where Ks is an integer greater than 1. Correspondingly, the terminal device receives Ks reference signals from the network device.

[0206] In the HBF architecture, the network device sends Ks analog beams in different directions to the terminal device. Each analog beam corresponds to one or more resources. This application takes an example where each analog beam corresponds to one resource. Accordingly, the network device configures Ks resources in the resource set and sends reference signals on Ks resources. The reference signals correspond one-to-one with the resources.

[0207] In one possible implementation, the aforementioned Ks reference signals can be transmitted in a time-division manner, that is, Ks reference signals are transmitted on different time-domain resources (time slots or orthogonal frequency division multiplexing (OFDM) symbols). Different reference signals correspond to different antenna ports. As mentioned earlier, the antenna ports can be analog antenna ports or reference signal port groups, etc.

[0208] For example, step S601 can be implemented as follows: the DU corresponding to the network device sends the aforementioned Ks reference signals through the RU. In the O-RAN system, step 601 can be implemented as follows: the O-DU corresponding to the network device sends the aforementioned Ks reference signals through the O-RU.

[0209] S602, the terminal device determines the first channel state information (CSI) report based on M of the Ks reference signals, where 1 ≤ M ≤ Ks.

[0210] In this step, the terminal device can determine the channel based on the received reference signal and measure it to obtain CSI parameters.

[0211] For example, the terminal device reports the first CSI report corresponding to M resources (i.e., resources corresponding to M reference signals) out of Ks resources (i.e. resources corresponding to Ks reference signals) configured in the CSI-RS resource set, where M can be any value from 1, 2, ..., Ks. For example, if Ks is 8, then M can be any value from 1 to 8.

[0212] In some implementations, the value of M can be determined based on the network device's configuration information. As an example, before step S601, the network device sends reference signal configuration information to the terminal device. Correspondingly, the terminal device receives the reference signal configuration information from the network device. The reference signal configuration information can be carried in an RRC message and may include reference signal resource configuration information and reference signal reporting configuration information. The network device can directly indicate the values ​​of Ks and M through the reference signal resource configuration information. It is understood that CRI is used to indicate resources in the CSI-RS resource set; that is, CRI corresponds one-to-one with resources in the CSI-RS resource set. Therefore, determining the value of M based on the network device's configuration information is equivalent to determining the number of CRIs (and / or PMI / RI / CQI fields corresponding to the M resources) in the CSI reported by the terminal device.

[0213] As a possible example, the value of M indicated in the network device's configuration information is actually the maximum possible value M. max The terminal device is based on the maximum selectable value M. max Determine a value less than or equal to the maximum possible value M. max M, for example: the maximum selectable value M indicated in the configuration information of a network device. max If M = 8, then the terminal device can determine any value from 1, 2, ..., 7, 8 as the value of M.

[0214] In some implementations, M CSI-RS correspond one-to-one with M resources. The terminal device can measure each CSI-RS to obtain the CSI parameters corresponding to each CSI-RS. According to the calculation method mentioned above, the terminal device can calculate the RI, PMI, CQI and LI corresponding to each of the M CSI-RS, which will not be elaborated here.

[0215] In some implementations, the network device can indicate to the terminal device the highest priority M among Ks reference signals. R There are 1 reference signals, 1 ≤ M R ≤M, the codebook accuracy corresponding to high-priority reference signals is higher.

[0216] In this application, the CRI corresponding to high-priority reference signals may or may not be reported.

[0217] When no report is submitted, the network device reads the first field in the first CSI report and identifies it as the CSI field corresponding to the high-priority reference signal. R The CSI parameters corresponding to the highest priority reference signals are listed at the top of the first CSI report, meaning that M is not reported. R The CRI of a high-priority reference signal, at this time the first CSI report only includes the MM. R The CRI corresponding to a lower priority reference signal.

[0218] When reporting, the first CSI report includes M CRIs. In this case, the terminal device can... R The CSI parameters corresponding to the highest priority reference signals are listed at the beginning of the first CSI report. Alternatively, the CSI parameters for each reference signal in the first CSI report can be manually ordered. It should be understood that regardless of the ordering method, the first CSI report will include M. R The CSI parameters corresponding to each high-priority reference signal.

[0219] In some implementations, the network device does not indicate the highest priority reference signal (M) among the Ks reference signals to the terminal device. R =0. In this case, the CRI corresponding to all reference signals among the M reference signals is reported.

[0220] It should be understood that when the first CSI report feeds back channel state information for multiple beams, some beams use high-precision codebooks and some use low-precision codebooks. In other words, channel state information corresponding to different codebook accuracies is fed back in the same channel state information report.

[0221] Generally speaking, beams using high-precision codebooks are of higher importance. Therefore, this application sorts the CSI parameters corresponding to different reference signal resources based on the codebook precision (i.e., an example of the first codebook parameter) of the PMI corresponding to the reference signal resource, and puts the CSI parameters corresponding to the high-precision codebook first. Thus, when uplink resources are limited, the CSI measurement results corresponding to the beam with high codebook precision can be reported.

[0222] When the first CSI report includes CSI information corresponding to multiple reference signal resources, the reporting volume varies for different resources.

[0223] The reported quantity is set to 'cri-RI-PMI-CQI' or 'cri-RI-LI-PMI-CQI'. When reporting broadband and subband in type I codebooks, different pmi-FormatIndicators need to be configured. For example, when the same CSI report carries CSI information corresponding to two resources, the pmi-FormatIndicator of the first resource is set to 'widebandPMI' and the second resource is set to 'subbandPMI'. That is, the first resource reports the broadband part of the field and the second resource reports the subband part of the field.

[0224] The format of the first CSI report will be described in detail in three cases: Case 1 is that all PMIs in the first CSI report use the type I codebook; Case 2 is that all PMIs in the first CSI report use the type II codebook; and Case 3 is that some PMIs in the first CSI report use the type I codebook and some PMIs use the type II codebook.

[0225] Understandably, codebook types can include any of the following: Type I Single-Panel Codebook, Type I Multi-Panel Codebook, Type II Codebook, Type II Port Selection Codebook, Enhanced Type II Codebook, Enhanced Type II Port Selection Codebook, Further enhanced Type II port selection codebook, Enhanced Type II codebook for CJT, Further enhanced Type II port selection codebook for CJT, Enhanced Type II codebook for predicted PMI, and Further enhanced Type II port selection codebook for predicted PMI. For detailed descriptions, please refer to the relevant sections on PMI in 3GPP technical specification (TS) 38.214. For ease of description, the following embodiments use Type I Single-Panel Codebook as an example for Type I codebooks and R16 Enhanced Type II Codebook as an example for Type II codebooks. Other codebook types are not excluded.

[0226] Case 1

[0227] For example, when all PMIs in the first CSI report use the type I codebook, the format of the first CSI report corresponding to M resources corresponds to the type I codebook. The format of the first CSI report corresponding to M resources can be found in Tables 14 to 31.

[0228] The first CSI report corresponding to M resources may include one or more of the following fields: M CRIs, RI, the first TB of broadband CQI, the first TB of subband differential CQI, the second TB of broadband CQI, the second TB of subband differential CQI, LI, PMI broadband information field X1, PMI broadband information field X2, and PMI subband information field X2.

[0229] Among them, the M CRIs also have different indication forms. As an example, the M CRIs can be indicated in the form of CRI k0, CRI k1, ……, CRI k m in which k m and m are integers, k m is used to indicate the index of the Ks resources for CSI-RS resource set configuration, and the corresponding value of k m is 0 ≤ k m < Ks, and the corresponding value of m is 0 ≤ m < M.

[0230] Assume that the above M resources include a first resource and a second resource. The first codebook parameter of the codebook adopted by the first resource and the codebook adopted by the second resource is different, and the CSI parameters corresponding to the first resource can be arranged before the CSI parameters corresponding to the second resource.

[0231] In this application, the first codebook parameter is used to characterize the codebook accuracy. That is, one first codebook parameter corresponds to one codebook accuracy.

[0232] Among them, the first codebook parameter of the codebook adopted by the first resource and the codebook adopted by the second resource is different, which can be understood as: the codebook accuracies of the codebooks adopted by the first resource and the second resource are different.

[0233] It should be understood that in this application, the CSI parameters corresponding to the codebook with high accuracy are arranged in the front. Therefore, the codebook accuracy of the codebook adopted by the first resource is greater than the codebook accuracy of the codebook adopted by the second resource. Among them, the codebook accuracy of the codebook adopted by the resource can be understood as: the codebook accuracy of the codebook adopted by the PMI corresponding to the resource.

[0234] It should be understood that the codebook accuracies of the codebooks adopted by the first resource and the second resource are different, including: the codebooks adopted by the first resource and the second resource are of the same codebook type, but the adopted codebook accuracies are different; or, it can also be that the codebook types of the codebooks adopted by the first resource and the second resource are different, so the codebook accuracies are different.

[0235] The Type I codebook includes the description part in Table 13, and from top to bottom, the accuracy changes from low to high.

[0236] Table 13

[0237] For example, suppose the base station is configured with the first beam (corresponding to the first resource) as Codebookmode=1, Type I Single-Panel codebook SB, and the second beam (corresponding to the second resource) as Codebookmode=2, Type I Single-Panel codebook WB. Then the codebook precision of the first resource is greater than that of the second resource, and thus the CSI parameters corresponding to the first resource are listed before the CSI parameters corresponding to the second resource.

[0238] Furthermore, the fields in the first CSI report above can be divided into two parts: Part 1 and Part 2. Part 1 includes the first parameter and the second parameter. The first parameter is the CSI parameter corresponding to the first resource in Part 1, including one or more of the following fields: CRI, RI, the broadband CQI of the first TB, and the subband differential CQI of the first TB. The second parameter is the CSI parameter corresponding to the second resource in Part 1, including one or more of the following fields: CRI, RI, the broadband CQI of the first TB, and the subband differential CQI of the first TB.

[0239] Part 2 includes a third parameter and a fourth parameter. The third parameter is the CSI parameter corresponding to the first resource in Part 2, including one or more of the following fields: Layer Indicator (LI), Wideband Precoding Matrix Indicator (PMI), Wideband CQI of the second TB, Subband Differential PMI, and Subband Differential CQI of the second TB. The fourth parameter is the CSI parameter corresponding to the second resource in Part 2, including one or more of the following fields: Layer Indicator (LI), Wideband Precoding Matrix Indicator (PMI), Wideband CQI of the second TB, Subband Differential PMI, and Subband Differential CQI of the second TB.

[0240] Part 2 supports both wideband and subband reporting. It should be understood that in Part 2, the third parameter can be divided into the fifth, seventh, and ninth parameters, and the fourth parameter can be divided into the sixth, eighth, and tenth parameters. It should also be understood that the fifth, seventh, and ninth parameters are part of the third parameter, and the sixth, eighth, and tenth parameters are part of the fourth parameter.

[0241] The second part of the broadband reporting includes a fifth parameter and a sixth parameter. The fifth parameter is the CSI parameter corresponding to the first resource in the second part of the broadband reporting, including one or more of the following fields: broadband CQI, LI, PMI broadband information field X1, and PMI broadband information field X2 for the second TB. The sixth parameter is the CSI parameter corresponding to the second resource in the second part of the broadband reporting, including one or more of the following fields: broadband CQI, LI, PMI broadband information field X1, and PMI broadband information field X2 for the second TB. PMI broadband information field X1 and PMI broadband information field X2 correspond to broadband PMI.

[0242] The second part of the subband reporting includes the seventh and eighth parameters. The seventh parameter is the CSI parameter corresponding to the first resource in the second part of the subband reporting, including one or more of the following fields: the PMI subband information field X2 corresponding to the even-numbered subband, and the subband differential CQI of the second TB corresponding to the even-numbered subband. The eighth parameter is the CSI parameter corresponding to the second resource in the second part of the subband reporting, including one or more of the following fields: the PMI subband information field X2 corresponding to the even-numbered subband, and the subband differential CQI of the second TB corresponding to the even-numbered subband.

[0243] The second part of the subband reporting also includes the ninth and tenth parameters. The ninth parameter is the CSI parameter corresponding to the first resource in the second part of the subband reporting, including one or more of the following fields: the PMI subband information field X2 corresponding to the odd-numbered subbands, and the subband differential CQI of the second TB corresponding to the odd-numbered subbands. The tenth parameter is the CSI parameter corresponding to the second resource in the second part of the subband reporting, including one or more of the following fields: the PMI subband information field X2 corresponding to the odd-numbered subbands, and the subband differential CQI of the second TB corresponding to the odd-numbered subbands.

[0244] For example, the report number corresponding to the first CSI report is #1. Unless otherwise specified below, the first resource includes the resource corresponding to CRI k0 among M resources, and the second resource includes the resource corresponding to CRI k1 among M resources, where the resource corresponding to CRI k0 is the first resource among the M resources, and the resource corresponding to CRI k1 is the second resource among the M resources. The codebook precision of the first resource is greater than that of the second resource.

[0245] The first part of the first CSI report includes a first parameter and a second parameter. The first parameter includes one or more of the following fields corresponding to the first resource: CRI, RI, the broadband CQI of the first TB, and the subband differential CQI of the first TB. The second parameter includes one or more of the following fields corresponding to the second resource: CRI, RI, the broadband CQI of the first TB, and the subband differential CQI of the first TB. The format of the first part can be found in Tables 14 to 21 below.

[0246] As one possible implementation, the first parameter is arranged before the second parameter; that is, the CSI fields included in the first parameter are arranged before the CSI fields included in the second parameter. The format of the first part (part 1) can be referred to in Table 14 below. In the first part (part 1) of this CSI report #1, according to the priority order of CRIs, the part 1 of the channel state information corresponding to the reference signal resource indicated by CRI k0 is arranged first, and then the part 1 of the channel state information corresponding to the reference signal resource indicated by CRI k1 is arranged.

[0247] Table 14

[0248] As shown in Table 14, the first part (part 1) may include CRI, RI, the broadband CQI of the first TB and the subband differential CQI of the first TB. The subband differential CQI is a set of multiple subband CQIs. The subband differential CQI in the first TB is associated with the corresponding resources in the M CSI-RS resources in ascending order of subband number.

[0249] In this context, the fields in part1 of the channel state information corresponding to each reference signal resource indicated by CRI are arranged in the following order: RI, wideband CQI in the first TB, and subband differential CQI in the first TB in ascending order of subband number. Taking CRIk0 as an example, the field immediately following the CRI k0 field to the field immediately preceding the CRI k1 field is used to carry part1 of the channel state information corresponding to the reference signal resource indicated by CRIk0.

[0250] The first parameter in Table 14 includes CRI k0 and the channel state information corresponding to the first resource (including the RI corresponding to the first resource, the broadband CQI of the first TB, and the subband differential CQI of the first TB), and the second parameter includes CRI k1 and the channel state information corresponding to the second resource (RI, the broadband CQI of the first TB, and the subband differential CQI of the first TB).

[0251] Since the first resource is configured as Codebookmode=1, Type I Single-Panel codebook SB, and the second resource is configured as Codebookmode=2, Type I Single-Panel codebook WB, the codebook precision of the first resource is greater than that of the second resource. Therefore, the CSI parameters of the first resource are listed before the CSI parameters of the second resource.

[0252] The first resource corresponds to CRI k0, and the second resource corresponds to CRI k1. Therefore, for CRI, as shown in Table 14, CRI k0 corresponding to the first resource precedes CRI k1 corresponding to the second resource. For CSI parameters such as RI and the broadband CQI of the first TB, since CRI k0 corresponding to the first resource precedes CRI k1 corresponding to the second resource, the CSI parameters such as RI and the broadband CQI of the first TB associated with the first resource are arranged in the order of the CSI parameters such as RI and the broadband CQI of the first TB associated with the second resource.

[0253] It should be understood that this application uses the CSI parameters corresponding to the first and second resources (i.e., the resources corresponding to CRI k0 and CRI k1) as an example to introduce the scheme of this application, as shown in Table 14. The first CSI report also includes other resources (i.e., CRI k2 to CRI k1). M-1 The CSI parameters of the corresponding resource will be adjusted from CRI k2 to CRI k. M-1 The corresponding M-2 resources are called the third resources. It should be understood that the codebook precision of the third resources in Table 14 is lower than that of the first and second resources.

[0254] The arrangement of CSI parameters corresponding to the third resource can be referred to in Table 14 or Table 15 below. This application does not limit the arrangement.

[0255] For example, the third resource is CRI k2 to CRI k M-1 The CSI parameters of the corresponding resources can be arranged according to the arrangement of the CSI parameters of the first and second resources in Table 15. That is, first arrange part1 of the channel state information corresponding to CRI k2, and then arrange them in order to CRI k. M-1 The corresponding channel state information part 1 is shown in Table 15.

[0256] Table 15

[0257] This article mainly discusses the order of the first and second parameters corresponding to the first and second resources. For the CSI parameters corresponding to the third resource, the order in Table 14 or Table 15 can be used, and this article does not limit it.

[0258] In some implementations, the CSI fields in Part 1 can also follow existing protocols, arranged from top to bottom in the order of CRI, RI, the first TB of wideband CQI, and the first TB of subband differential CQI, as shown in Table 16 below. In this CSI report #1, Part 1, the parameters in the M channel state information are arranged as units according to the priority order of CRI, first arranging the indices of the M reference signal resources (CRI k0~CRI k). M-1 Then arrange M RIs, then arrange M broadband CQIs in the first TB, and then arrange M subband differential CQIs in the first TB.

[0259] Table 16

[0260] As shown in Table 16, Part 1 may include M CRIs, RIs, the first TB of wideband CQI, and the first TB of subband differential CQI. Since the first resource is configured as Codebookmode=1, Type I Single-Panel codebook SB, and the second resource is configured as Codebookmode=2, Type I Single-Panel codebook WB, the codebook precision of the first resource is higher than that of the second resource. Therefore, for the same CSI parameter, the CSI parameter corresponding to the first resource is listed before the CSI parameter corresponding to the second resource.

[0261] The first resource corresponds to CRI k0, and the second resource corresponds to CRI k1. Therefore, for CRIs, as shown in Table 16, CRI k0 corresponding to the first resource precedes CRI k1 corresponding to the second resource. For RIs, the RI associated with the first resource (i.e., the first resource) among the M CSI-RS resources is arranged before the RI associated with the second resource (i.e., the second resource) among the M CSI-RS resources.

[0262] Similarly, in Table 16, the broadband CQI of the first TB corresponding to the first resource is arranged before the broadband CQI of the first TB corresponding to the second resource, and the subband differential CQI of the first TB corresponding to the first resource is arranged before the subband differential CQI of the first TB corresponding to the second resource. The order of other CSI parameters can be obtained similarly.

[0263] In some implementations, the first resource is a high-priority resource designated by the network device. The CSI parameters corresponding to the first resource are listed before the CSI parameters corresponding to the second resource, so the first resource may not report CRI, meaning that the first CSI report may not include CRI k0. The network device reads the first field in the first CSI report and identifies it as the CSI field corresponding to the high-priority reference signal.

[0264] Correspondingly, based on Table 14, the first CSI report may not include CRI k0, and thus the format of the first CSI report is as shown in Table 17.

[0265] Table 17

[0266] Correspondingly, based on Table 15, the first CSI report may not include CRI k0, and thus the format of the first CSI report is as shown in Table 18.

[0267] Table 18

[0268] Tables 14 to 18 use the example of the first resource including the resource corresponding to CRI k0 and the second resource including the resource corresponding to CRI k1. It should be understood that the first resource can also include multiple resources, and the second resource can also include multiple resources. For example, the first resource includes the resources corresponding to CRI k0 and CRI k1, and the second resource includes CRI k2 to CRI k... M-1 The corresponding resources. In this case, Tables 14 to 18 can also be understood as the CSI parameters corresponding to the first resource (i.e., the first parameters) being arranged before the CSI parameters corresponding to the second resource (i.e., the second parameters).

[0269] In this scenario, the first resource is a high-priority resource designated by the network device. The CSI parameters corresponding to the first resource are listed before the CSI parameters corresponding to the second resource. Therefore, the first resource may not report CRIs; that is, CRI k0 and CRI k1 may not be included in the first CSI report. The network device reads the fields listed first in the first CSI report and identifies them as the CSI fields corresponding to the high-priority reference signals. Optionally, as shown in Table 19 or Table 20, the second resource (CRI k2 to CRI k...) in Tables 19 and 20... M-1 The CSI parameters for the corresponding resources are arranged differently.

[0270] Table 19

[0271] Table 20

[0272] Alternatively, the first CSI report can also be as shown in Table 21, that is, after omitting CRI k0 and CRI k1, first arrange the remaining M-2 CRIs, then arrange the M RIs, then arrange the M broadband CQIs in the first TB, and then arrange the M subband differential CQIs in the first TB.

[0273] Table 21

[0274] It should be understood that Tables 14 to 21 above are merely illustrative examples and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the contents of Tables 14 to 21 that result in new table contents are within the protection scope of the embodiments of this application.

[0275] The following describes the reporting format for Part 2. For CSI information corresponding to a resource, Part 2 can be reported in either broadband or subband format. Assuming that both the first and second resources report Part 2 in broadband format, the format of Part 2 reported in broadband format can be found in Tables 16 and 17 below.

[0276] The second part of the broadband form includes a fifth parameter and a sixth parameter. The fifth parameter includes one or more of the following fields corresponding to the first resource: the broadband CQI, LI, and broadband PMI of the second TB (PMI broadband information field X1 and PMI broadband information field X2). The sixth parameter includes one or more of the following fields corresponding to the second resource: the broadband CQI, LI, and PMI broadband information field X1 and PMI broadband information field X2 of the second TB.

[0277] In some implementations, the second part (part 2) of the broadband form can include the second TB of broadband CQI only when the RI value corresponding to the resources in the first part (part 1) of Tables 14 to 21 is greater than 4, and Tables 22 and 23 include the second TB of broadband CQI.

[0278] In some implementations, the fifth parameter precedes the sixth parameter; that is, the CSI fields included in the fifth parameter precede the CSI fields included in the sixth parameter. The format of the second part (part 2) in the broadband form can be referenced in Table 22 below. In the broadband CSI report #1, the second part (part 2) of the CSI is arranged according to the priority order of CRIs, first the part 2 of the channel state information corresponding to the reference signal resource indicated by CRI k0, and then the part 2 of the channel state information corresponding to the reference signal resource indicated by CRI k1.

[0279] Table 22

[0280] As shown in Table 22, the second part of the broadband form can include the second TB of broadband CQI, LI, PMI broadband information field X1, and PMI broadband information field X2. Among them, LI indicates the column with the strongest energy corresponding to the reported PMI. The second part of Table 22 includes M LIs, that is, the M LIs correspond one-to-one with the M CSI-RS resources.

[0281] In Table 22, the broadband CQI, LI, and PMI broadband information fields X1 and X2 of the second TB corresponding to the first resource are the fifth parameter, and the broadband CQI, LI, and PMI broadband information fields X1 and X2 of the second TB corresponding to the second resource are the sixth parameter. As shown in Table 22, since the first resource is configured as Codebookmode=1, Type I Single-Panel codebook SB, and the second resource is configured as Codebookmode=2, Type I Single-Panel codebook WB, the codebook precision of the first resource is greater than that of the second resource. Therefore, the CSI parameter corresponding to the first resource is listed before the CSI parameter corresponding to the second resource.

[0282] In some implementations, the CSI fields in the second part (part 2) of the broadband form can also follow existing protocols, arranged from top to bottom in the order of the second TB broadband CQI, LI, PMI broadband information field X1, and PMI broadband information field X2, as shown in Table 23 below. In the broadband of this CSI report #1 CSI second part (part 2), the parameters in the M channel state information are arranged as units according to the priority order of CRIs: first, the M second TB broadband CQIs are arranged, then the M LIs, then the M PMI broadband information fields X1, and then the M PMI broadband information fields X2.

[0283] Table 23

[0284] As shown in Table 23, the second part (part 2) of the broadband form may include the broadband CQI, LI, PMI broadband information field X1, and PMI broadband information field X2 of the second TB. Since the first resource is configured as Codebookmode=1, Type I Single-Panel codebook SB, and the second resource is configured as Codebookmode=2, Type I Single-Panel codebook WB, the codebook precision of the first resource is greater than that of the second resource. Therefore, the CSI parameters corresponding to the first resource are arranged before the CSI parameters corresponding to the second resource.

[0285] For example, the first resource corresponds to the first resource out of M resources, and the second resource corresponds to the second resource out of M resources. For the second TB of broadband CQI, as shown in Table 23, the broadband CQI of the second TB associated with the first resource is arranged before the broadband CQI of the second TB associated with the second resource. For LI, the LI associated with the first resource is arranged before the LI associated with the second resource.

[0286] Similarly, in Table 23, the PMI broadband information field X1 corresponding to the first resource is arranged before the PMI broadband information field X1 corresponding to the second resource, and the PMI broadband information field X2 corresponding to the first resource is arranged before the PMI broadband information field X2 corresponding to the second resource.

[0287] It should be understood that Tables 22 and 12 above are merely illustrative examples and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the contents of Tables 22 and 23 that result in new table contents are within the protection scope of the embodiments of this application.

[0288] The following assumes that both the first and second resources are reported in sub-band format for Part 2. The format of Part 2 in sub-band format can be found in Tables 24 and 25 below. Part 2 in sub-band format includes the seventh, eighth, ninth, and tenth parameters. The seventh parameter includes one or more of the following fields corresponding to the first resource: PMI sub-band information field X2 for even-numbered sub-bands, and sub-band differential CQI for the second TB for even-numbered sub-bands. The eighth parameter includes one or more of the following fields corresponding to the second resource: PMI sub-band information field X2 for even-numbered sub-bands, and sub-band differential CQI for the second TB for even-numbered sub-bands. The ninth parameter includes one or more of the following fields corresponding to the first resource: PMI sub-band information field X2 for odd-numbered sub-bands, and sub-band differential CQI for the second TB for odd-numbered sub-bands. The tenth parameter includes one or more of the following fields corresponding to the second resource: PMI sub-band information field X2 for odd-numbered sub-bands, and sub-band differential CQI for the second TB for odd-numbered sub-bands.

[0289] In some implementations, the second part (part 2) of the subband form can include the subband differential CQI of the second TB only when the RI value corresponding to the resource in the first part (part 1) of Tables 14 to 21 is greater than 4. Tables 24 and 25 include the subband differential CQI of the second TB.

[0290] In some implementations, the seventh parameter precedes the eighth parameter; that is, the CSI fields included in the seventh parameter precede the CSI fields included in the eighth parameter. Similarly, the ninth parameter precedes the tenth parameter; that is, the CSI fields included in the ninth parameter precede the CSI fields included in the tenth parameter. The format of the second part (part 2) of the sub-band can be referenced in Table 24 below. In the second part (part 2) of this CSI report #1, according to the priority order of CRIs, the part 2 of the channel state information corresponding to the reference signal resource indicated by CRI k0 is arranged first, followed by the part 2 of the channel state information corresponding to the reference signal resource indicated by CRI k1.

[0291] Table 24

[0292] As shown in Table 24, the second part of the subband format (part 2) may include the subband differential CQI and PMI subband information field X2 of the second TB.

[0293] In some implementations, when the entire bandwidth configuration is divided into multiple subbands and numbered, the subbands can be classified according to the parity of their numerical numbers. Subbands with odd numerical numbers are called odd subbands, and subbands with even numerical numbers are called even subbands. Therefore, the subband differential CQI of the second TB in Table 24 can be divided into odd subbands and even subbands. The subband differential CQI of the second TB corresponding to the M even subbands corresponds one-to-one with the M CSI-RS resources, and the subband differential CQI of the second TB corresponding to the M odd subbands corresponds one-to-one with the M CSI-RS resources.

[0294] Similarly, the PMI subband information field X2 in Table 24 can also be divided into odd-numbered subbands and even-numbered subbands. The PMI subband information field X2 corresponding to the M even-numbered subbands corresponds one-to-one with the M CSI-RS resources, and the PMI subband information field X2 corresponding to the M odd-numbered subbands corresponds one-to-one with the M CSI-RS resources.

[0295] In Table 24, the subband differential CQI (including odd and even subbands) and PMI subband information field X2 (including odd and even subbands) of the second TB corresponding to the first resource are the seventh parameter, and the subband differential CQI (including odd and even subbands) and PMI subband information field X2 (including odd and even subbands) of the second TB corresponding to the second resource are the eighth parameter. As shown in Table 24, since the first resource is configured as Codebookmode=1, Type I Single-Panel codebook SB, and the second resource is configured as Codebookmode=2, Type I Single-Panel codebook WB, the codebook precision of the first resource is greater than that of the second resource. Therefore, the CSI fields included in the seventh parameter are all arranged before the CSI fields included in the eighth parameter, and the CSI fields included in the ninth parameter are all arranged before the CSI fields included in the tenth parameter.

[0296] In some implementations, the CSI fields in the second part (part 2) of the subband format can also follow existing protocols, arranged from top to bottom in the order of even-numbered subbands in the second TB's subband differential CQI, even-numbered subbands in the PMI subband information field X2, odd-numbered subbands in the second TB's subband differential CQI, and odd-numbered subbands in the PMI subband information field X2, as shown in Table 25 below. In the first part (part 1) of this CSI report #1, the parameters in the M channel state information are arranged as units according to the priority order of CRI. First, the even-numbered subbands in the M second TB's subband differential CQI are arranged, then the even-numbered subbands in the M PMI subband information field X2 are arranged, then the odd-numbered subbands in the M second TB's subband differential CQI are arranged, and then the odd-numbered subbands in the M PMI subband information field X2 are arranged.

[0297] Table 25

[0298] As shown in Table 25, the second part (part 2) of the subband format may include the subband differential CQI and PMI subband information fields X2 of the second TB. Since the first resource is configured as Codebookmode=1, Type I Single-Panel codebook SB, and the second resource is configured as Codebookmode=2, Type I Single-Panel codebook WB, the codebook precision of the first resource is greater than that of the second resource. Therefore, for the same CSI parameter, the CSI parameter corresponding to the first resource is listed before the CSI parameter corresponding to the second resource.

[0299] For example, the first resource corresponds to the first resource out of M resources, and the second resource corresponds to the second resource out of M resources. For the broadband CQI of the second TB, as shown in Table 25, the broadband CQI of the second TB associated with the first resource is listed before the broadband CQI of the second TB associated with the second resource. For LI, the LI associated with the first resource is listed before the LI associated with the second resource. For the subband differential CQI of the second TB, as shown in Table 25, the subband differential CQI of the second TB associated with the first resource out of M CSI-RS resources and the subband differential CQI of the second TB associated with the second resource out of M CSI-RS resources are listed before the subband differential CQIs of other second TBs. According to Table 25, the subband differential CQI of the second TB here includes both odd-numbered and even-numbered subbands.

[0300] Similarly, in Table 25, the PMI subband information field X2 corresponding to the first resource is arranged before the PMI subband information field X2 corresponding to the second resource. Here, the PMI subband information field X2 includes odd-numbered subbands and even-numbered subbands.

[0301] It should be understood that Tables 24 and 25 above are merely illustrative examples and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the contents of Tables 24 and 25 that result in new table contents are within the protection scope of the embodiments of this application.

[0302] Assuming that the first resource reports the second part (part 2) in subband form and the second resource reports the second part (part 2) in broadband form, the format of the second part (part 2) can be seen in Table 26 below.

[0303] The second part (part 2) of the subband form corresponding to the first resource includes a third parameter, which includes one or more of the following fields corresponding to the first resource: PMI subband information field X2 corresponding to even subbands, subband differential CQI of the second TB corresponding to even subbands, PMI subband information field X2 corresponding to odd subbands, and subband differential CQI of the second TB corresponding to odd subbands.

[0304] The second part (part 2) of the broadband form corresponding to the second resource includes a fourth parameter, which includes one or more of the following fields corresponding to the second resource: the broadband CQI, LI, PMI broadband information field X1 and PMI broadband information field X2 of the second TB.

[0305] In some implementations, when the RI value corresponding to the resource in the first part (part 1) of Tables 14 and 15 is greater than 4, the second part (part 2) of the subband form corresponding to the first resource can include the subband differential CQI of the second TB, that is, the subband differential CQI of the second TB is included in Table 26.

[0306] In some implementations, when the RI value corresponding to the resource in the first part (part 1) of Tables 14 and 15 is greater than 4, the second part (part 2) of the broadband form corresponding to the second resource can include the second TB of broadband CQI, that is, the broadband CQI that includes the second TB in Table 26.

[0307] In some implementations, the third parameter precedes the fourth parameter. That is, the second part (part 2) of the subband form corresponding to the first resource precedes the second part (part 2) of the broadband form corresponding to the second resource. The format of the second part (part 2) can be seen in Table 26 below. In the second part (part 2) of this CSI report #1, according to the priority order of CRIs, the part 2 of the channel state information corresponding to the reference signal resource (first resource) indicated by CRIk0 is arranged first, followed by the part 2 of the channel state information corresponding to the reference signal resource indicated by CRIk1 (second resource).

[0308] Table 26

[0309] As shown in Table 26, since the first resource is configured as Codebookmode=1, Type I Single-Panel codebook SB, and the second resource is configured as Codebookmode=2, Type I Single-Panel codebook WB, the codebook precision of the first resource is greater than that of the second resource. Therefore, the second part (part 2) of the sub-band form corresponding to the first resource is arranged before the second part (part 2) of the wideband form corresponding to the second resource, that is, the third parameter is arranged before the fourth parameter.

[0310] It should be understood that Table 26 above is merely an illustrative example and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the contents of Table 26 that result in new table content fall within the protection scope of the embodiments of this application.

[0311] Optionally, the terminal device may move the third parameter, which was originally included in the second part (part 2), to the first part (part 1) to avoid the loss of the CSI parameter of the first resource in the second part (part 2) in broadband form. That is, the first parameter may also include at least one of the third parameters, namely, the first parameter may also include at least one of the following parameters: at least one of the fifth parameters, at least one of the seventh parameters, and at least one of the ninth parameters.

[0312] In some implementations, the first parameter may also include one or more of the following fields corresponding to the first resource: the broadband CQI, LI, PMI broadband information field X1, and PMI broadband information field X2 of the second TB. That is, the first parameter also includes at least one of the fifth parameters. In this implementation, the format of the first part (part 1) of the first CSI report can be referenced in Table 27 below.

[0313] Table 27

[0314] As shown in Table 27, the first part (part 1) may include CRI, RI, the broadband CQI of the first TB, the subband differential CQI of the first TB, and the broadband CQI of the second TB corresponding to the first resource, LI, PMI broadband information field X1 and PMI broadband information field X2.

[0315] In Table 27, the CRI k0, RI, the broadband CQI of the first TB, the subband differential CQI of the first TB, the broadband CQI of the second TB, LI, and PMI broadband information fields X1 and X2 corresponding to the first resource are the first parameters. The CRI k1, RI, the broadband CQI of the first TB, and the subband differential CQI of the first TB corresponding to the second resource are the second parameters. As shown in Table 27, since the codebook precision of the first resource is higher than that of the second resource, the CSI fields included in the first parameters are arranged before the CSI fields included in the second parameters.

[0316] It should be noted that the first parameter can include the broadband CQI of the second TB corresponding to the first resource only when the RI value corresponding to the first resource is greater than 4.

[0317] In 3GPP TS 38.212, the broadband CQI, LI, PMI broadband information fields X1 and X2 of the second TB are arranged in the second part (part 2) of the broadband form. The first parameter in Table 27 includes the broadband CQI, LI, PMI broadband information fields X1 and X2 of the second TB corresponding to the first resource. The first parameter is arranged in the first part (part 1), which is equivalent to moving the broadband CQI, LI, PMI broadband information fields X1 and X2 of the second TB corresponding to the first resource from the second part (part 2) of the broadband form to the first part (part 1).

[0318] Accordingly, when the first parameter includes the broadband CQI, LI, PMI broadband information field X1 and PMI broadband information field X2 of the second TB corresponding to the first resource, the format of the second part (part 2) of the broadband form of the first CSI report can be referred to as shown in Table 28.

[0319] Table 28

[0320] As shown in Table 28, since the broadband CQI, LI, PMI broadband information fields X1 and X2 of the second TB corresponding to the first resource are moved from the second part (part 2) of the broadband form to the first part (part 1), the second part (part 2) of the broadband form does not include the broadband CQI, LI, PMI broadband information fields X1 and X2 of the second TB corresponding to the first resource.

[0321] In the first CSI report, the top-to-bottom order is Part 1, Part 2 (broadband format), and Part 2 (subband format). Specifically, CSI fields in Part 1 precede those in Part 2 (broadband format). In cases of resource scarcity or reporting conflicts, later-ordered CSI fields are discarded. Since the codebook precision of the first resource is higher than that of the second resource, the terminal device moves the CSI fields corresponding to the first resource in Part 2 (broadband format) to Part 1 (broadband format) to avoid losing these fields and thus ensuring feedback quality.

[0322] It should be understood that Tables 27 and 28 above are merely illustrative examples and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the contents of Tables 27 and 28 that result in new table contents are within the protection scope of the embodiments of this application.

[0323] In some implementations, based on Table 27, the first parameter may also include one or more of the following fields corresponding to the first resource: PMI subband information field X2 and the subband differential CQI of the second TB. That is, the first parameter also includes at least one of the seventh and ninth parameters. In this implementation, the format of the first part (part 1) of the first CSI report can be referred to as shown in Table 29 below.

[0324] Table 29

[0325] As shown in Table 29, the first part (part 1) may include M CRIs, RI, the broadband CQI of the first TB, the subband differential CQI of the first TB, the broadband CQI of the second TB corresponding to the first resource, LI, PMI broadband information field X1 and PMI broadband information field X2, as well as the PMI subband information field X2 corresponding to the first resource and the subband differential CQI of the second TB.

[0326] In Table 29, the CRI k0, RI, the broadband CQI of the first TB, the subband differential CQI of the first TB, the broadband CQI of the second TB, LI, PMI broadband information field X1, PMI broadband information field X2, the subband differential CQI of the second TB (including odd and even subbands), and the PMI subband information field X2 (including odd and even subbands) corresponding to the first resource are the first parameters. The CRI k1, RI, the broadband CQI of the first TB, and the subband differential CQI of the first TB corresponding to the second resource are the second parameters. As shown in Table 29, since the codebook precision of the first resource is higher than that of the second resource, the CSI fields included in the first parameters are arranged before the CSI fields included in the second parameters.

[0327] In 3GPP TS 38.212, the PMI subband information field X2 and the subband differential CQI of the second TB are arranged in the second part (part 2) of the subband form. In Table 29, apart from the broadband CQI, LI, PMI broadband information field X1 and PMI broadband information field X2 corresponding to the first resource, the first parameter also includes the PMI subband information field X2 and the subband differential CQI of the second TB corresponding to the first resource. The first parameter is arranged in the first part (part 1), which is equivalent to moving the PMI subband information field X2 and the subband differential CQI of the second TB corresponding to the first resource from the second part (part 2) of the subband form to the first part (part 1).

[0328] Accordingly, when the first parameter also includes the broadband CQI, LI, PMI broadband information field X1, PMI broadband information field X2 of the second TB corresponding to the first resource, and the PMI subband information field X2 and the subband differential CQI of the second TB corresponding to the first resource, the format of the second part (part 2) of the broadband form in the first CSI report can be referred to Table 28, and will not be repeated here. The format of the second part (part 2) of the subband form in the first CSI report can be referred to Table 30.

[0329] Table 30

[0330] As shown in Table 30, since the PMI subband information field X2 corresponding to the first resource and the subband differential CQI of the second TB are moved to the first part (part 1), the second part (part 2) of the subband form does not include the PMI subband information field X2 corresponding to the first resource and the subband differential CQI of the second TB.

[0331] In the first CSI report, the CSI fields included in Part 1 are listed before the CSI fields included in Part 2 (subband format). In cases of resource scarcity or reporting conflicts, CSI fields listed later are discarded. Since the priority of the first resource is higher than that of the second resource, as shown in Table 30, except for Part 2 (broadband format), the CSI fields corresponding to the first resource in Part 2 (subband format) are moved to Part 1 (subband format) to avoid the loss of CSI fields corresponding to the first resource in Part 2 (subband format), thus ensuring feedback quality.

[0332] It should be understood that Tables 29 to 30 above are merely illustrative examples and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the contents of Tables 29 to 30 that result in new table contents are within the protection scope of the embodiments of this application.

[0333] Optionally, the terminal device can move the second parameter originally included in the first part (part 1) to the second part (part 2), thereby ensuring that the CSI parameter corresponding to the first resource in the broadband form of the second part (part 2) is reported first.

[0334] In some implementations, the fifth parameter (or third parameter) may also include one or more of the following fields corresponding to the second resource: CRI, RI, the broadband CQI of the first TB, and the subband differential CQI of the first TB. That is, the fifth parameter (or third parameter) also includes at least one of the second parameters. In this implementation, the format of the broadband in part 2 of the first CSI report can be referenced in Table 31 below.

[0335] Table 31

[0336] As shown in Table 31, the second parameter, which was originally included in the first part (part 1), is moved to the second part (part 2) in broadband form, thereby ensuring that the CSI parameter corresponding to the first resource in the first part (part 1) is reported first.

[0337] It should be understood that Table 14 - Table 31 above show the arrangement order of the CSI parameters of the resources corresponding to CRI k0 and the CSI parameters of the resources corresponding to CRI k1. For the CSI parameters corresponding to any one of the remaining M - 2 resources, they can be arranged before the CSI parameters of the resources corresponding to CRI k0, or after the CSI parameters of the resources corresponding to CRI k1, or between the CSI parameters of the resources corresponding to CRI k0 and the CSI parameters of the resources corresponding to CRI k1, which depends on the codebook precision of any one of the remaining M - 2 resources. It should be understood that for any two resources among the above M resources, if their codebook precisions are different, the CSI parameters corresponding to the resource with a higher codebook precision are arranged before the CSI parameters corresponding to the resource with a lower codebook precision. The specific arrangement method can refer to Table 14 - Table 31 above.

[0338] Case 2

[0339] Exemplarily, when the PMIs in the first CSI report all adopt the codebook of type II, the format of the first CSI report corresponding to the M resources corresponds to the codebook of type II. The format for reporting the first CSI report corresponding to the M resources can refer to Table 33 to Table 45.

[0340] The first CSI report corresponding to the M resources may include one or more of the following fields: CRI, RI, wideband CQI of the first transport block (TB), sub - band differential CQI of the first TB, selected L value, indication of the selected L value combination, indicator K of the sum of non - zero coefficients of all layers corresponding to all CRIs, indicator K of the sum of non - zero coefficients of all layers corresponding to a single CRI, PMI field X1, PMI field X2. n value combination, indicator K of the sum of non - zero coefficients of all layers corresponding to all CRIs NZ , indicator K of the sum of non - zero coefficients of all layers corresponding to a single CRI NZ , PMI field X1, PMI field X2.

[0341] Among them, there are also different indication forms for the M CRIs. As an example, the M CRIs can be indicated in the form of CRI k0, CRI k1, ……, CRI k m , where k m and m are integers, k m is used to indicate the index of the Ks resources of the CSI - RS resource set configuration, and the value of k m corresponds to 0 ≤ k m < P, and the value of m corresponds to 0 ≤ m < M.

[0342] Assume that the above M resources include a first resource and a second resource, and the first codebook parameters of the codebook adopted by the first resource and the codebook adopted by the second resource are different. The CSI parameters corresponding to the first resource can be arranged before the CSI parameters corresponding to the second resource.

[0343] In this application, the first codebook parameter is used to characterize the codebook precision. That is, one first codebook parameter corresponds to one codebook precision.

[0344] The codebook parameters used in the first resource and the codebook used in the second resource are different, which can be understood as the codebook precision of the first resource and the codebook used in the second resource being different.

[0345] It should be understood that this application prioritizes the CSI parameters corresponding to the high-precision codebook; therefore, the codebook precision of the codebook used in the first resource is greater than that of the codebook used in the second resource. The codebook precision of the resource can be understood as the codebook precision of the codebook used by the PMI corresponding to the resource.

[0346] It should be understood that the codebook used by the first resource and the codebook used by the second resource have different codebook precision, including: the codebook used by the first resource and the codebook used by the second resource are of the same codebook type, but the codebook precision is different; or, the codebook used by the first resource and the codebook used by the second resource are of different codebook types, and therefore the codebook precision is different.

[0347] The following example uses R16 EType II as the Type II codebook. The R16 EType II codebook includes the parts described in Table 32, and the precision increases from top to bottom.

[0348] Table 32

[0349] For example, suppose the base station configures the first beam (corresponding to the first resource) as eType II (paramCombination-r16=5) and the second beam (corresponding to the second resource) as eType II (paramCombination-r16=3). Then the codebook precision of the first resource is greater than the codebook precision of the second resource, so the CSI parameters corresponding to the first resource are arranged before the CSI parameters corresponding to the second resource.

[0350] Furthermore, the fields in the first CSI report above can be divided into two parts: Part 1 and Part 2. Part 1 includes the first parameter and the second parameter. The first parameter is the CSI parameter corresponding to the first resource in Part 1, including one or more of the following fields: CRI, RI, wideband CQI of the first transport block (TB), subband differential CQI of the first TB, selected L value, and selected L value. nThe indicator K is the sum of the non-zero coefficients of all layers corresponding to all CRIs, representing the combination of values. NZ The indicator K is the sum of the non-zero coefficients of all layers corresponding to a single CRI. NZ The second parameter is the CSI parameter corresponding to the second resource in Part 1, including one or more of the following fields: CRI, RI, wideband CQI of the first transport block (TB), subband differential CQI of the first TB, selected L value, selected L n The indicator K is the sum of the non-zero coefficients of all layers corresponding to all CRIs, representing the combination of values. NZ The indicator K is the sum of the non-zero coefficients of all layers corresponding to a single CRI. NZ .

[0351] Part 2 includes a third parameter and a fourth parameter. The third parameter is the CSI parameter corresponding to the first resource in Part 2, which includes one or more of the following fields: PMI field X1, a part of PMI field X2 (which may be referred to as the first part of PMI field X2), and a part of PMI field X2 (which may be referred to as the second part of PMI field X2). The fourth parameter is the CSI parameter corresponding to the second resource in Part 2, which includes one or more of the following fields: PMI field X1, a part of PMI field X2 (which may be referred to as the first part of PMI field X2), and a part of PMI field X2 (which may be referred to as the second part of PMI field X2).

[0352] It should be understood that in Part 2, the third parameter can be divided into the fifth, seventh, and ninth parameters, and the fourth parameter can be divided into the sixth, eighth, and tenth parameters. It should be understood that the fifth, seventh, and ninth parameters are part of the third parameter, and the sixth, eighth, and tenth parameters are part of the fourth parameter. Part 2 may include one or more of the following three groups, wherein...

[0353] Group 0 includes the fifth and sixth parameters. The fifth parameter is the CSI Part 2, the CSI parameter corresponding to the first resource in Group 0, which includes one or more of the following fields: PMI field X1, specifically including one or more of the following fields: i 1,1 i 1,2 i 1,8,l Where l = 1, ...,; the sixth parameter is the CSI second part (part 2), the CSI parameter corresponding to the second resource in group 0, including one or more of the following fields: PMI field X1, specifically including one or more of the following fields: i 1,1 i 1,2 i 1,8,l, where l=1,…,.

[0354] Group 1 includes the seventh and eighth parameters. The seventh parameter is CSI Part 2, the CSI parameter corresponding to the first resource in Group 1, which includes one or more of the following fields: a part of PMI field X2 (which may be referred to as Part 1), specifically including one or more of the following fields: i 2,3,l i 1,5 i 1,6,l i 1,9 ,{i 2,4,l} l＝1,…,υ ,{i 2,5,l} l＝1,…,υ ,{i 1,7,l} l＝1,…,υ Where l = 1, ..., v; the eighth parameter is the CSI second part (part 2), the CSI parameter corresponding to the second resource in group 1, including one or more of the following fields: a part of PMI field X2, specifically including one or more of the following fields: i 2,3,l i 1,5 i 1,6,l i 1,9 ,{i 2,4,l} l＝1,…,υ ,{i 2,5,l} l＝1,…,υ ,{i 1,7,l} l＝1,…,υ , where l=1,…,v.

[0355] Group 2 includes the ninth and tenth parameters. The ninth parameter is the second part of the CSI (part 2). The CSI parameters corresponding to the first resource in Group 2 include one or more of the following fields: a part of the PMI field X2 (which may be referred to as the second part), specifically including one or more of the following fields {i 2,4,l} l＝1,…,υ ,{i 2,5,l} l＝1,…,υ ,{i 1,7,l} l＝1,…,υ , where l = 1, ..., v; the tenth parameter is the CSI parameter corresponding to the second resource in group 2 of the second part (part 2), including one or more of the following fields: a part of the PMI field X2, specifically including one or more of the following fields {i 2,4,l} l＝1,…,υ ,{i 2,5,l} l＝1,…,υ ,{i 1,7,l} l＝1,…,υ , where l=1,…,v.

[0356] For example, the report number corresponding to the first CSI report is #n, the first resource includes the resource corresponding to CRI k0 among M resources, the second resource includes the resource corresponding to CRI k1 among M resources, the resource corresponding to CRI k0 is the first resource among M resources, and the resource corresponding to CRI k1 is the second resource among M resources. The codebook precision of the first resource is greater than the codebook precision of the second resource.

[0357] The first part of the first CSI report includes the first parameter and the second parameter. The format of the first part can be found in Tables 33 to 37 below.

[0358] As one possible implementation, the first parameter is arranged before the second parameter; that is, the CSI fields included in the first parameter are arranged before the CSI fields included in the second parameter. The format of the first part (part 1) can be seen in Table 33 below. In the first part (part 1) of this CSI report #1, according to the priority order of CRIs, the part 1 of the channel state information corresponding to the reference signal resource indicated by CRI k0 is arranged first, then the part 1 of the channel state information corresponding to the reference signal resource indicated by CRI k1 is arranged, and so on.

[0359] Table 33

[0360] As shown in Table 33, Part 1 may include CRI, RI, the broadband CQI of the first TB, the subband differential CQI of the first TB, an indicator of the selected L value, and an indicator K of the sum of non-zero coefficients of all layers. NZ .

[0361] In this context, the fields in part 1 of the channel state information corresponding to the reference signal resource indicated by each CRI are arranged in the following order: RI, wideband CQI in the first TB, subband differential CQI in the first TB in ascending order of subband number, indicator of the selected L value, and indicator K of the sum of non-zero coefficients of all layers. NZ Taking CRIk0 as an example, the field immediately following the CRIk0 field to the field immediately preceding the CRIk1 field is used to carry part1 of the channel state information corresponding to the reference signal resource indicated by CRIk0.

[0362] The first parameter in Table 33 includes CRI k0 and the channel state information corresponding to the first resource (including the RI corresponding to the first resource, the broadband CQI of the first TB and the subband differential CQI of the first TB, the indicator of the selected L value and the indicator K of the sum of the non-zero coefficients of all layers). NZThe second parameter includes CRI k1 and the channel state information corresponding to the second resource (RI, the wideband CQI of the first TB and the subband differential CQI of the first TB, an indicator of the selected L value, and an indicator K of the sum of the non-zero coefficients of all layers). NZ ).

[0363] In some implementations, the CSI field in Part 1 can also follow existing protocols, from top to bottom as CRI, RI, the broadband CQI of the first TB, the subband differential CQI of the first TB, an indicator of the selected L value, and an indicator K for the sum of non-zero coefficients of all layers. NZ The parameters are arranged in the following order, as shown in Table 34 below. In the first part of CSI report #1, the parameters in the M channel state information are arranged as units according to the priority order of CRI. First, the indices of the M reference signal resources (CRIk0~CRIk) are arranged. M-1 Then arrange the M RIs, then arrange the M broadband CQIs in the first TB, then arrange the M subband differential CQIs in the first TB, then arrange the indicators of the selected L values, and then arrange the indicators K of the sum of non-zero coefficients of all layers. NZ .

[0364] Table 34

[0365] As shown in Table 34, since the codebook precision of the first resource is higher than that of the second resource, for the same CSI parameter, the CSI parameter corresponding to the first resource is arranged before the CSI parameter corresponding to the second resource.

[0366] The first resource corresponds to CRI k0, and the second resource corresponds to CRI k1. Therefore, for CRIs, as shown in Table 34, CRI k0 corresponding to the first resource precedes CRI k1 corresponding to the second resource. For RIs, the RI associated with the first resource among the M CSI-RS resources is arranged before the RI associated with the second resource among the M CSI-RS resources.

[0367] Similarly, in Table 34, the broadband CQI of the first TB corresponding to the first resource is arranged before the broadband CQI of the first TB corresponding to the second resource; the subband differential CQI of the first TB corresponding to the first resource is arranged before the subband differential CQI of the first TB corresponding to the second resource; the indicator of the selected L value corresponding to the first resource is arranged before the indicator of the selected L value corresponding to the second resource; and the indicator K of the sum of non-zero coefficients of all layers corresponding to the first resource is arranged before the indicator of the selected L value corresponding to the second resource. NZ The indicator K is the sum of the non-zero coefficients of all layers corresponding to the second resource. NZ Before.

[0368] In some implementations, the first resource is a high-priority resource designated by the network device. The CSI parameters corresponding to the first resource are listed before the CSI parameters corresponding to the second resource, thus the first resource may not report CRI, meaning the first CSI report may not include CRI k0. The network device reads the first field listed in the first CSI report and identifies it as the CSI field corresponding to the high-priority reference signal.

[0369] Correspondingly, based on Table 33, the first CSI report may not include CRI k0, and thus the format of the first CSI report is as shown in Table 35.

[0370] Table 35

[0371] Correspondingly, based on Table 34, the first CSI report may not include CRI k0, and thus the format of the first CSI report is shown in Table 36.

[0372] Table 36

[0373] In Tables 35 and 36 above, the L value corresponding to each resource is indicated separately. It should be understood that the L value corresponding to all resources can also be indicated by combination. For example, if the codebook type of the first resource is eType II (paramCombination-r16=4) and the codebook type of the second resource is eType II (paramCombination-r16=5), then the L value corresponding to both the first and second resources is 4. In this case, only one L value needs to be reported, that is, the indication of the selected Ln value combination, as shown in Table 37.

[0374] Table 37

[0375] It should be understood that Tables 33 to 37 above are merely illustrative examples and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the contents of Tables 33 to 37 that result in new table contents are within the protection scope of the embodiments of this application.

[0376] The format of group 0 in part 2 can be found in Table 38 below. Group 0 in part 2 includes the fifth parameter and the sixth parameter. The fifth parameter includes one or more of the following fields corresponding to the first resource: PMI field X1; the sixth parameter includes one or more of the following fields corresponding to the second resource: PMI field X1.

[0377] In some implementations, the fifth parameter precedes the sixth parameter; that is, the CSI fields included in the fifth parameter precede the CSI fields included in the sixth parameter. The format of group 0 in part 2 can be referenced in Table 38 below. In this CSI report #n, in part 2, group 0 of CSI, according to the priority order of CRIs, group 0 of part 2 of the channel state information corresponding to the reference signal resource indicated by CRIk0 is arranged first, followed by group 0 of part 2 of the channel state information corresponding to the reference signal resource indicated by CRIk1.

[0378] Table 38

[0379] As shown in Table 38, group 0 of part 2 may include the PMI field X1.

[0380] In Table 38, the PMI field X1 corresponding to the first resource is the fifth parameter, and the PMI field X1 corresponding to the second resource is the sixth parameter. As shown in Table 38, since the codebook precision of the first resource is higher than that of the second resource, the CSI fields included in the fifth parameter are all arranged before the CSI fields included in the sixth parameter.

[0381] It should be understood that Table 38 above is merely an illustrative example and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the content of Table 38 that result in new table content fall within the protection scope of the embodiments of this application.

[0382] The format of Group 1 in Part 2 can be found in Table 39 below. Group 1 in Part 2 includes the seventh parameter and the eighth parameter. The seventh parameter includes one or more of the following fields corresponding to the first resource: a portion of the PMI field X2; the eighth parameter includes one or more of the following fields corresponding to the second resource: a portion of the PMI field X2.

[0383] In some implementations, the seventh parameter precedes the eighth parameter; that is, the CSI fields included in the seventh parameter precede the CSI fields included in the eighth parameter. The format of the second part (part 2) in subband form can be referenced in Table 39 below. In this CSI report #n CSI second part (part 2), group 1, according to the priority order of CRIs, group 1 of part 1 of the channel state information corresponding to the reference signal resource indicated by CRIk0 is arranged first, followed by group 1 of part 2 of the channel state information corresponding to the reference signal resource indicated by CRIk1.

[0384] Table 39

[0385] As shown in Table 39, Group 1 of Part 2 may include a portion of the PMI field X2.

[0386] In Table 39, a portion of the PMI field X2 corresponding to the first resource is the seventh parameter, and a portion of the PMI field X2 corresponding to the second resource is the eighth parameter. As shown in Table 39, since the codebook precision of the first resource is higher than that of the second resource, the CSI fields included in the seventh parameter are all arranged before the CSI fields included in the eighth parameter.

[0387] It should be understood that Table 39 above is merely an illustrative example and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the content of Table 39 that result in new table content fall within the protection scope of the embodiments of this application.

[0388] The format of Group 2 in Part 2 can be found in Table 30 below. Group 2 in Part 2 includes the ninth parameter and the tenth parameter. The ninth parameter includes one or more of the following fields corresponding to the first resource: a portion of the PMI field X2; the tenth parameter includes one or more of the following fields corresponding to the second resource: a portion of the PMI field X2.

[0389] In some implementations, the ninth parameter precedes the tenth parameter; that is, the CSI fields included in the ninth parameter precede the CSI fields included in the tenth parameter. The format of the second part (part 2) in subband form can be referenced in Table 40 below. In this CSI report #n CSI second part (part 2), group 2, according to the priority order of CRIs, the group 2 of part 1 of the channel state information corresponding to the reference signal resource indicated by CRIk0 is arranged first, and then the group 2 of part 2 of the channel state information corresponding to the reference signal resource indicated by CRIk1 is arranged.

[0390] Table 40

[0391] As shown in Table 40, group 2 of part 2 may include a portion of the PMI field X2.

[0392] In Table 40, a portion of the PMI field X2 corresponding to the first resource is the ninth parameter, and a portion of the PMI field X2 corresponding to the second resource is the tenth parameter. As shown in Table 40, since the codebook precision of the first resource is higher than that of the second resource, the CSI fields included in the ninth parameter are all arranged before the CSI fields included in the tenth parameter.

[0393] It should be understood that Table 40 above is merely an illustrative example and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the content of Table 40 that result in new table content fall within the protection scope of the embodiments of this application.

[0394] Optionally, the terminal device may move the third parameter, which was originally included in the second part (part 2), to the first part (part 1) to avoid the loss of the CSI parameter of the first resource in the second part (part 2) in broadband form. That is, the first parameter may also include at least one of the third parameters, namely, the first parameter may also include at least one of the following parameters: at least one of the fifth parameters, at least one of the seventh parameters, and at least one of the ninth parameters.

[0395] In some implementations, the first parameter may also include one or more of the following fields corresponding to the first resource: PMI field X1. That is, the first parameter also includes at least one of the fifth parameters. In this implementation, the format of the first part (part 1) of the first CSI report can be referred to in Table 41 below.

[0396] Table 41

[0397] As shown in Table 41, Part 1 may include CRI, RI, the broadband CQI of the first TB, the subband differential CQI of the first TB, an indicator of the selected L value, and an indicator K of the sum of non-zero coefficients of all layers. NZ And the PMI field X1 corresponding to the first resource.

[0398] Table 41 shows the CRI k0, RI, broadband CQI of the first TB, subband differential CQI of the first TB, indicator of the selected L value, and indicator K of the sum of non-zero coefficients of all layers corresponding to the first resource. NZ The PMI field X1 is the first parameter, and the second resource corresponds to CRI k1, RI, the broadband CQI of the first TB, the subband differential CQI of the first TB, the indicator of the selected L value, and the indicator K of the sum of non-zero coefficients of all layers. NZ This is the second parameter. As shown in Table 41, since the codebook precision of the first resource is higher than that of the second resource, the CSI fields included in the first parameter are arranged before the CSI fields included in the second parameter.

[0399] Arranging the fifth parameter in the first part (part 1) is equivalent to moving the PMI field X1 corresponding to the first resource from group 0 in the second part (part 2) to the first part (part 1).

[0400] Accordingly, as shown in Table 42, when the first parameter includes the PMI field X1 corresponding to the first resource, the format of the second part (part 2) group 0 of the first CSI report can be referenced as shown in Table 42.

[0401] Table 42

[0402] As shown in Table 42, since the PMI field X1 corresponding to the first resource is moved from group 0 of the second part (part 2) to the first part (part 1), the PMI field X1 corresponding to the first resource is not included in group 0 of the second part (part 2).

[0403] In the first CSI report, the order from top to bottom is Part 1, Part 2 (Group 0), Group 1, and Group 2. That is, the CSI fields included in Part 1 are listed before the CSI fields included in Group 0 of Part 2. In cases of resource scarcity or reporting conflicts, CSI fields listed later in the order are discarded. Because the codebook precision of the first resource is higher than that of the second resource, the terminal device moves the CSI fields corresponding to the first resource in Group 0 of Part 2 to Part 1. This avoids the loss of CSI fields corresponding to the first resource in Group 0 of Part 2, thus ensuring feedback quality.

[0404] It should be understood that Tables 41 and 42 above are merely illustrative examples and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the contents of Tables 41 and 42 that result in new table contents are within the protection scope of the embodiments of this application.

[0405] In some implementations, based on Table 41, the first parameter may also include one or more of the following fields corresponding to the first resource: a portion of the PMI field X2. That is, the first parameter may also include at least one of the seventh or ninth parameters. In this implementation, the format of the first part (part 1) of the first CSI report can be referenced as shown in Table 43 below.

[0406] Table 43

[0407] As shown in Table 43, Part 1 may include CRI, RI, the broadband CQI of the first TB, the subband differential CQI of the first TB, an indicator of the selected L value, and an indicator K for the sum of non-zero coefficients of all layers. NZ And a portion of the PMI fields X1 and X2 corresponding to the first resource.

[0408] Table 43 shows the CRI k0, RI, broadband CQI of the first TB, subband differential CQI of the first TB, indicator of the selected L value, and indicator K for the sum of non-zero coefficients of the layer. NZ The first parameter consists of a portion of PMI field X1 and PMI field X2, the second parameter consists of CRI k1, RI, the broadband CQI of the first TB, the subband differential CQI of the first TB, an indicator of the selected L value, and an indicator K for the sum of non-zero coefficients of the layer. NZ The PMI field X1 and a portion of the PMI field X2 constitute the second parameter. As shown in Table 43, since the codebook precision of the first resource is higher than that of the second resource, the CSI fields included in the first parameter are arranged before the CSI fields included in the second parameter.

[0409] Arranging the seventh parameter in the first part (part 1) is equivalent to moving a portion of the PMI field X2 corresponding to the first resource from group 1 of the second part (part 2) to the first part (part 1).

[0410] Accordingly, as shown in Table 44, when the first parameter includes a portion of the PMI field X2 corresponding to the first resource, the format of the second part (part 2) group 1 of the first CSI report can be referenced as shown in Table 44.

[0411] Table 44

[0412] As shown in Table 44, since a portion of the PMI field X2 corresponding to the first resource is moved from group 1 of the second part (part 2) to the first part (part 1), the second part (part 2) group 1 does not include a portion of the PMI field X2 corresponding to the first resource.

[0413] In the first CSI report, the order from top to bottom is Part 1, Part 2 (Group 0, Group 1, and Group 2). That is, the CSI fields included in Part 1 are listed before the CSI fields included in Group 1 of Part 2. In cases of resource scarcity or reporting conflicts, CSI fields listed later in the order are discarded. Because the codebook precision of the first resource is higher than that of the second resource, the terminal device moves the CSI fields corresponding to the first resource in Group 1 of Part 2 to Part 1. This avoids the loss of CSI fields corresponding to the first resource in Group 1 of Part 2, thus ensuring feedback quality.

[0414] It should be understood that Tables 43 and 44 above are merely illustrative examples and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the contents of Tables 43 and 44 that result in new table contents are within the protection scope of the embodiments of this application.

[0415] Optionally, the terminal device can move the second parameter originally included in the first part (part 1) to the second part (part 2), thereby ensuring that the CSI parameter corresponding to the first resource in the broadband form of the second part (part 2) is reported first.

[0416] In some implementations, the fifth parameter (or the third parameter) may also include one or more of the following fields corresponding to the second resource: CRI, RI, the broadband CQI of the first TB, the subband differential CQI of the first TB, an indicator of the selected L value, and an indicator K of the sum of non-zero coefficients of all layers. NZ In other words, the fifth parameter (or the third parameter) also includes at least one of the second parameters. In this implementation, the format of group 0 in the second part (part 2) of the first CSI report can be found in Table 45 below.

[0417] Table 45

[0418] As shown in Table 45, the second parameter, which was originally included in the first part (part 1), is moved to group 0 of the second part (part 2), thereby ensuring that the CSI parameter corresponding to the first resource in the first part (part 1) is reported first.

[0419] It should be understood that Tables 33-45 above show the order of the CSI parameters of the resource corresponding to CRI k0 and the resource corresponding to CRI k1. For the CSI parameters of any of the remaining K-2 resources, they can be placed before, after, or between the CSI parameters of the resource corresponding to CRI k0 and CRI k1, depending on the codebook precision of any of the remaining K-2 resources. It should also be understood that for any two resources among the M resources, if their codebook precision is different, the CSI parameters of the resource with higher codebook precision will be placed before the CSI parameters of the resource with lower codebook precision. The specific arrangement can be found in Tables 33-45 above.

[0420] Case 3

[0421] For example, when some PMIs in the first CSI report use the codebook of type I and some PMIs use the codebook of type II, the format of the first CSI report corresponding to M resources corresponds to the codebooks of type I and type II. The format of the first CSI report corresponding to M resources can be found in Tables 46 to 59.

[0422] In one implementation, the network device can indicate M out of M resources to the terminal device. R This resource is a high-priority resource, M. R High-priority resources use type II codebooks, while the remaining resources use type I codebooks.

[0423] In another implementation, the network device can indicate to the terminal device that M1 of the M resources use a codebook of type II, and M2 resources use a codebook of type I.

[0424] In another implementation, the first M1 of the pre-configured M resources use a codebook of type II, and the remaining M2 resources use a codebook of type I.

[0425] Assuming that the above M resources include a first resource and a second resource, and based on the above implementation method, it is determined that the first resource adopts a codebook of type II and the second resource adopts a codebook of type I. Then, the first codebook parameters of the codebooks adopted by the first resource and the codebooks adopted by the second resource are different, and the CSI parameters corresponding to the first resource can be arranged before the CSI parameters corresponding to the second resource.

[0426] In this application, the first codebook parameter is used to characterize the codebook precision. That is, one first codebook parameter corresponds to one codebook precision.

[0427] The codebook parameters used in the first resource and the codebook used in the second resource are different, which can be understood as the codebook precision of the first resource and the codebook used in the second resource being different.

[0428] It should be understood that this application prioritizes the CSI parameters corresponding to the high-precision codebook; therefore, the codebook precision of the codebook used in the first resource is greater than that of the codebook used in the second resource. The codebook precision of the resource can be understood as the codebook precision of the codebook used by the PMI corresponding to the resource.

[0429] It should be understood that the codebooks used in the first resource and the codebooks used in the second resource have different codebook precision, including: the codebooks used in the first resource and the codebooks used in the second resource are of the same codebook type, but the codebook precision is different; or, the codebooks used in the first resource and the codebooks used in the second resource are of different codebook types, and therefore the codebook precision is different.

[0430] It should be understood that the codebook types of the first resource and the second resource can also be opposite, i.e., the first resource uses a type I codebook and the second resource uses a type II codebook; this application does not limit this. It should be understood that when the first resource uses a type I codebook and the second resource uses a type II codebook, the codebook precision of the PMI corresponding to the first resource is less than the codebook precision of the PMI corresponding to the second resource. The CSI parameters corresponding to the first resource can be arranged after the CSI parameters corresponding to the second resource.

[0431] For ease of understanding and description, the method of this application will be introduced below using a codebook of type II for the first resource and a codebook of type I for the second resource as an example.

[0432] The following example, using the first CSI report including CSI parameters corresponding to the first and second resources, illustrates the format of the first CSI report. It should be understood that the first CSI report may also include CSI parameters corresponding to other resources among the M resources, which are not shown in this application.

[0433] For example, suppose the base station is configured with the first beam (corresponding to the first resource) as eType II (paramCombination-r16=5) and the second beam (corresponding to the second resource) as Codebookmode=2, Type I codebook WB. Then the codebook precision of the first resource is greater than that of the second resource, and thus the CSI parameters corresponding to the first resource are arranged before the CSI parameters corresponding to the second resource.

[0434] Furthermore, the fields in the first CSI report above can be divided into two parts: Part 1 and Part 2. Part 1 includes the first parameter and the second parameter. For the first resource, since the first resource uses a Type II codebook, the first parameter corresponding to the first resource can refer to the relevant description of the first or second parameter in Case 2. That is, the first parameter is the CSI parameter corresponding to the first resource in Part 1, including one or more of the following fields: CRI, RI, wideband CQI of the first transport block (TB), subband differential CQI of the first TB, selected L value, selected L value. n The indicator K is the sum of the non-zero coefficients of all layers corresponding to all CRIs, representing the combination of values. NZ The indicator K is the sum of the non-zero coefficients of all layers corresponding to a single CRI. NZ For the second resource, since the second resource adopts the codebook of type I, the second parameter corresponding to the second resource can refer to the relevant description of the first parameter or the second parameter in case 1. That is, the second parameter is the CSI parameter corresponding to the second resource in part 1, including one or more of the following fields: CRI, RI, the broadband CQI of the first TB, and the subband differential CQI of the first TB.

[0435] The second part of the first CSI report includes the CSI parameters for the first resource (i.e., an example of the third parameter) and the CSI parameters for the second resource (i.e., an example of the fourth parameter).

[0436] It should be understood that in Part 2, the third parameter can be divided into the fifth, seventh, and ninth parameters, and the fourth parameter can be divided into the sixth, eighth, and tenth parameters. It should also be understood that the fifth, seventh, and ninth parameters are part of the third parameter, and the sixth, eighth, and tenth parameters are part of the fourth parameter.

[0437] Specifically, for the CSI parameters corresponding to the first resource, since the first resource uses a type II codebook, the CSI parameters corresponding to the first resource in part 2 are reported in the following three groups:

[0438] Group 0 includes the fifth parameter, which is the second part of the CSI (Center for Information Security). The CSI parameter corresponding to the first resource in Group 0 includes one or more of the following fields: PMI field X1, specifically including one or more of the following fields: i 1,1 i 1,2 i 1,8,l , where l=1,…,.

[0439] Group 1 includes the seventh parameter, which is the second part of the CSI. The CSI parameter corresponding to the first resource in Group 1 includes one or more of the following fields: a part of PMI field X2 (i.e., the first part of PMI field X2), specifically including one or more of the following fields: i 2,3,l i 1,5 i 1,6,l i 1,9 ,{i 2,4,l} l＝1,…,υ ,{i 2,5,l} l＝1,…,υ ,{i 1,7,l} l＝1,…,υ , where l=1,…,v.

[0440] Group 2 includes the ninth parameter, which is the second part of the CSI. The CSI parameter corresponding to the first resource in Group 2 includes one or more of the following fields: a part of PMI field X2 (i.e., the second part of PMI field X2), specifically including one or more of the following fields {i 2,4,l} l＝1,…,υ ,{i 2,5,l} l＝1,…,υ ,{i 1,7,l} l＝1,…,υ , where l=1,…,v.

[0441] For the CSI parameters corresponding to the second resource, since the second resource uses a type I codebook, in part 2, the CSI parameters corresponding to the second resource are reported in both wideband and subband formats.

[0442] The broadband section includes a sixth parameter, which is the CSI parameter corresponding to the second resource in the second part of the broadband form (part 2), including one or more of the following fields: broadband CQI, LI, PMI broadband information field X1 and PMI broadband information field X2 of the second TB.

[0443] The subband section includes a sixth parameter and an eighth parameter. The sixth parameter is the CSI parameter corresponding to the second resource in the second part (part 2) of the subband form, including one or more of the following fields: the PMI subband information field X2 corresponding to even-numbered subbands, and the subband differential CQI of the second TB corresponding to even-numbered subbands. The eighth parameter is the CSI parameter corresponding to the second resource in the second part (part 2) of the subband form, including one or more of the following fields: the PMI subband information field X2 corresponding to odd-numbered subbands, and the subband differential CQI of the second TB corresponding to odd-numbered subbands.

[0444] For example, the report number corresponding to the first CSI report is #n, the first resource includes the resources corresponding to CRI k0 and CRI k1 among M resources, and the second resource includes CRI k2 to CRI k among M resources. M-1 The corresponding resources are as follows: CRI k0 corresponds to the first resource out of M resources, and CRI k1 corresponds to the second resource out of M resources. The codebook precision of the first resource is greater than that of the second resource.

[0445] The first part of the first CSI report includes the first parameter and the second parameter. The first parameter includes one or more of the following fields corresponding to the first resource: CRI, RI, broadband CQI of the first TB, subband differential CQI of the first TB, selected L value, and selected L. n The indicator K is the sum of the non-zero coefficients of all layers corresponding to all CRIs, representing the combination of values. NZ The indicator K is the sum of the non-zero coefficients of all layers corresponding to a single CRI. NZ The second parameter includes one or more of the following fields corresponding to the second resource: CRI, RI, the broadband CQI of the first TB, and the subband differential CQI of the first TB. The format of Part 1 can be found in Tables 46 to 49 below.

[0446] As one possible implementation, the first parameter is arranged before the second parameter; that is, the CSI fields included in the first parameter are arranged before the CSI fields included in the second parameter. The format of the first part (part 1) can be referred to in Table 46 below. In the first part (part 1) of this CSI report #1, according to the priority order of CRIs, the part 1 of the channel state information corresponding to the reference signal resource indicated by CRIk0 is arranged first, and then the part 1 of the channel state information corresponding to the reference signal resource indicated by CRIk1 is arranged.

[0447] Table 46

[0448] As shown in Table 46, Part 1 may include some CSI parameters corresponding to the first and second resources. The fields in Part 1 of the channel state information corresponding to each CRI-indicated reference signal resource are arranged in the following order: RI, wideband CQI in the first TB, subband differential CQI in the first TB in ascending order of subband number. For Type II codebook resources, the indicators of the selected L value and the indicator K of the sum of non-zero coefficients of all layers can also be arranged. NZFor example, taking CRIk0, the field immediately following the CRIk0 field to the field immediately preceding the CRIk1 field is used to carry part 1 of the channel state information corresponding to the reference signal resource indicated by CRIk0.

[0449] The first parameter in Table 46 includes CRI k0 and CRI k1, as well as the channel state information corresponding to the first resource (including the RI corresponding to the first resource, the broadband CQI of the first TB and the subband differential CQI of the first TB, the indicator of the selected L value, and the indicator K of the sum of non-zero coefficients of all layers). NZ The second parameter includes CRI k2 to CRI k. M-1 And the channel state information (RI, the first TB of broadband CQI and the first TB of subband differential CQI) corresponding to the second resource.

[0450] In some implementations, the CSI fields in Part 1 can also follow existing protocols, arranged from top to bottom in the order of CRI, RI, the wideband CQI of the first TB, and the subband differential CQI of the first TB, as shown in Table 47 below. In Part 1 of this CSI report #1, the parameters in the M channel state information are arranged as units according to the priority order of CRI. First, the indices of the M reference signal resources are arranged, then the M RIs are arranged, then the M wideband CQIs in the first TB are arranged, and then the M subband differential CQIs in the first TB are arranged. For Type II codebook resources, the indicators of the selected L value and the indicator K of the sum of non-zero coefficients of all layers can also be arranged. NZ wait.

[0451] Table 47

[0452] As shown in Table 47, since the codebook precision of the first resource is higher than that of the second resource, for the same CSI parameter, the CSI parameter corresponding to the first resource is arranged before the CSI parameter corresponding to the second resource.

[0453] The first resource corresponds to CRI k0 and CRI k1, and the second resource corresponds to CRI k2 to CRI k. M-1 Therefore, for CRIs, as shown in Table 47, the CRI corresponding to the first resource precedes the CRI corresponding to the second resource. For RIs, the RI corresponding to the first resource precedes the RI corresponding to the second resource.

[0454] Similarly, in Table 47, the broadband CQI of the first TB corresponding to the first resource is arranged before the broadband CQI of the first TB corresponding to the second resource, and the subband differential CQI of the first TB corresponding to the first resource is arranged before the subband differential CQI of the first TB corresponding to the second resource.

[0455] Optional, an indicator of the selected L value corresponding to the first resource, and an indicator K of the sum of non-zero coefficients of all layers. NZ It can be placed after or before the subband differential CQI of the first TB corresponding to the second resource; this application does not limit this.

[0456] In some implementations, the first resource is a high-priority resource designated by the network device. The CSI parameters corresponding to the first resource are listed before the CSI parameters corresponding to the second resource, thus the first resource may not report CRIs; that is, the first CSI report may not include CRI k0 and CRI k1. The network device reads the fields listed first in the first CSI report and identifies them as the CSI fields corresponding to high-priority reference signals.

[0457] Correspondingly, based on Table 46, the first CSI report may not include CRI k0 and CRI k1, so the format of the first CSI report is as shown in Table 48.

[0458] Table 48

[0459] Correspondingly, based on Table 47, the first CSI report may not include CRI k0, and thus the format of the first CSI report is as shown in Table 49.

[0460] Table 49

[0461] It should be understood that Tables 46 to 49 above are merely illustrative examples and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the contents of Tables 46 to 49 that result in new table contents are within the protection scope of the embodiments of this application.

[0462] The format of Part 2 can be referenced in Table 50 below. Since the codebook precision of the first resource is higher than that of the second resource, for parameters of the same type or with similar importance, the CSI parameter corresponding to the first resource is arranged before the CSI parameter corresponding to the second resource.

[0463] Optionally, part 2 includes a fifth parameter and a sixth parameter. The fifth parameter includes one or more of the following fields corresponding to the first resource: PMI field X1; the sixth parameter includes one or more of the following fields corresponding to the second resource: the second TB's broadband CQI, LI, PMI broadband information field X1 and PMI broadband information field X2.

[0464] Optionally, the second part also includes a seventh parameter and an eighth parameter. The seventh parameter includes one or more of the following fields corresponding to the first resource: the first part of the PMI field X2; the eighth parameter includes one or more of the following fields corresponding to the second resource: the PMI subband information field X2 corresponding to the even subband, and the subband differential CQI of the second TB corresponding to the even subband.

[0465] Optionally, part 2 also includes a ninth parameter and a tenth parameter. The ninth parameter includes one or more of the following fields corresponding to the first resource: the second part of the PMI field X2; the tenth parameter includes one or more of the following fields corresponding to the second resource: the PMI subband information field X2 corresponding to the odd subband, and the subband differential CQI of the second TB corresponding to the odd subband.

[0466] In some implementations, the fifth parameter precedes the sixth parameter, meaning the CSI fields included in the fifth parameter precede those included in the sixth parameter; the seventh parameter precedes the eighth parameter, meaning the CSI fields included in the seventh parameter precede those included in the eighth parameter; and the ninth parameter precedes the tenth parameter, meaning the CSI fields included in the ninth parameter precede those included in the tenth parameter. The format of Part 2 can be referenced in Table 50 below. In this CSI report #1, Part 2 of CSI is arranged according to the priority order of CRIs: first, Part 2 of the channel state information corresponding to the reference signal resource indicated by CRIk0 is arranged, then Part 2 of the channel state information corresponding to the reference signal resource indicated by CRIk1 is arranged.

[0467] Table 50

[0468] As shown in Table 50, the CSI fields of the first resource and the second resource are arranged in a cross-order manner. That is, first, some CSI parameters corresponding to the first resource are arranged, then some CSI parameters corresponding to the second resource are arranged, then another part of the CSI parameters corresponding to the first resource are arranged, then another part of the CSI parameters corresponding to the second resource are arranged, and so on.

[0469] Alternatively, based on Table 50, after sorting the fields of Group 2 corresponding to the first resource, the sub-band part corresponding to the second resource can be sorted, as shown in Table 51.

[0470] Table 51

[0471] It should be understood that all fields corresponding to a single resource can be sorted before sorting the fields of another resource, as shown in Table 52.

[0472] Table 52

[0473] It should be understood that Tables 50 to 52 above are merely illustrative examples and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the contents of Tables 50 to 52 that result in new table contents are within the protection scope of the embodiments of this application.

[0474] Optionally, the terminal device may move the third parameter, which was originally included in the second part (part 2), to the first part (part 1) to avoid the loss of the CSI parameter of the first resource in the second part (part 2) in broadband form. That is, the first parameter may also include at least one of the third parameters, namely, the first parameter may also include at least one of the following parameters: at least one of the fifth parameters, at least one of the seventh parameters, and at least one of the ninth parameters.

[0475] In some implementations, the first parameter may also include one or more of the following fields corresponding to the first resource: PMI field X1. That is, the first parameter also includes at least one of the fifth parameters. In this implementation, the format of the first part (part 1) of the first CSI report can be referred to Table 53 below.

[0476] Table 53

[0477] As shown in Table 53, the first part (part 1) may include CRI, RI, the broadband CQI of the first TB, the subband differential CQI of the first TB, and the PMI field X1 corresponding to the first resource.

[0478] Table 53 lists the CRI k0, CRI k1, RI, broadband CQI of the first TB, subband differential CQI of the first TB, broadband CQI of the second TB, indicator of the selected L value, and indicator K of the sum of non-zero coefficients of all layers for the first resource. NZ The PMI field X1 is the first parameter, and the second resource corresponds to CRI k2 to CRI k. M-1The RI, the broadband CQI of the first TB, and the subband differential CQI of the first TB constitute the second parameter. As shown in Table 53, since the codebook precision of the first resource is higher than that of the second resource, the CSI fields included in the first parameter are arranged before the CSI fields included in the second parameter.

[0479] The first parameter in Table 53 includes the PMI field X1 corresponding to the first resource. The first parameter is arranged in the first part (part 1), which is equivalent to moving the PMI field X1 corresponding to the first resource from group 0 in the second part (part 2) to the first part (part 1).

[0480] Accordingly, when the first parameter includes the PMI field X1 corresponding to the first resource, the format of the second part (part 2) of the first CSI report can be referenced as shown in Table 54.

[0481] Table 54

[0482] As shown in Table 54, since the PMI field X1 corresponding to the first resource is moved from group 0 of the second part (part 2) to the first part (part 1), the second part (part 2) does not include the PMI field X1 corresponding to the first resource.

[0483] In the first CSI report, the order from top to bottom is Part 1 and Part 2, meaning that the CSI fields included in Part 1 are listed before those included in Part 2. In cases of resource scarcity or reporting conflicts, CSI fields listed later in the order are discarded. Because the codebook precision of the first resource is higher than that of the second resource, the terminal device moves the CSI fields corresponding to the first resource in Group 0 of Part 2 to Part 1. This avoids the loss of CSI fields corresponding to the first resource in Group 0 of Part 2 in broadband form, thus ensuring feedback quality.

[0484] It should be understood that Tables 53 and 54 above are merely illustrative examples and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the contents of Tables 53 and 54 that result in new table contents are within the protection scope of the embodiments of this application.

[0485] In some implementations, based on Table 53, the first parameter may also include one or more of the following fields corresponding to the first resource: all or part of the PMI field X2. That is, the first parameter also includes at least one of the seventh and ninth parameters. In this implementation, the format of the first part (part 1) of the first CSI report can be referenced as shown in Table 55 below.

[0486] Table 55

[0487] As shown in Table 55, Part 1 may include CRI, RI, the broadband CQI of the first TB, the subband differential CQI of the first TB, an indicator of the selected L value, and an indicator K for the sum of the non-zero coefficients of all layers. NZ And the PMI fields X1 and X2 corresponding to the first resource.

[0488] Table 55 shows the CRI k0, RI, broadband CQI of the first TB, subband differential CQI of the first TB, indicator of the selected L value, and indicator K for the sum of non-zero coefficients of the layer. NZ The PMI fields X1 and X2 are the first parameters, and the CRI k1, RI, the broadband CQI of the first TB, and the subband differential CQI of the first TB corresponding to the second resource are the second parameters. As shown in Table 55, since the codebook precision of the first resource is higher than that of the second resource, the CSI fields included in the first parameters are arranged before the CSI fields included in the second parameters.

[0489] Arranging the seventh and / or ninth parameters in the first part (part 1) is equivalent to moving the PMI field X2 corresponding to the first resource from group 1 and / or group 2 in the second part (part 2) to the first part (part 1).

[0490] Accordingly, when the first parameter includes all or part of the PMI field X2 corresponding to the first resource, the format of the second part (part 2) of the first CSI report can be referenced as shown in Table 56.

[0491] Table 56

[0492] As shown in Table 56, since all or part of the PMI field X2 corresponding to the first resource is moved from the second part (part 2) to the first part (part 1), the PMI field X2 corresponding to the first resource is not included in group 1 of the second part (part 2).

[0493] In the first CSI report, the order from top to bottom is Part 1, Part 2 (Group 0, Group 1, and Group 2), meaning the CSI fields included in Part 1 are listed before those included in Part 2. In cases of resource scarcity or reporting conflicts, later CSI fields are discarded. Because the codebook precision of the first resource is higher than that of the second resource, the terminal device moves the CSI fields corresponding to the first resource in Part 2 to Part 1, thus preventing the loss of CSI fields corresponding to the first resource in Group 1 of Part 2 and ensuring feedback quality.

[0494] It should be understood that Tables 55 and 56 above are merely illustrative examples and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the contents of Tables 55 and 56 that result in new table contents are within the protection scope of the embodiments of this application.

[0495] Optionally, the terminal device can move the second parameter originally included in the first part (part 1) to the second part (part 2), thereby ensuring that the CSI parameter corresponding to the first resource in the broadband form of the second part (part 2) is reported first.

[0496] In some implementations, the fifth parameter (or the third parameter) may also include one or more of the following fields corresponding to the second resource: CRI, RI, the broadband CQI of the first TB, the subband differential CQI of the first TB, an indicator of the selected L value, and an indicator K of the sum of non-zero coefficients of all layers. NZ In other words, the fifth parameter (or the third parameter) also includes at least one of the second parameters. In this implementation, the format of the second part (part 2) of the first CSI report can be found in Table 57 below.

[0497] Table 57

[0498] As shown in Table 57, the second parameter, which was originally included in the first part (part 1), is moved to the second part (part 2), thereby ensuring that the CSI parameter corresponding to the first resource in the first part (part 1) is reported first.

[0499] S603, the terminal device sends a first CSI report to the network device. Correspondingly, the network device receives the first CSI report from the terminal device.

[0500] Understandably, the first CSI report is equivalent to the Kth resource set configuration of CSI-RS. S The terminal device receives the reference signals corresponding to the M resources. For each of the M resources, the terminal device can determine the CSI corresponding to the M resources using the CSI parameter calculation method described above, and determine the order of the CSI fields in the first CSI report, which is then fed back to the network device.

[0501] For example, in the access network device shown in Figure 2, the specific implementation of the network device receiving the first CSI report can be as follows: the RU corresponding to the network device receives the first CSI report, and the DU processes it. In the O-RAN system, the specific implementation of the network device receiving the first CSI report can be as follows: the O-RU corresponding to the network device receives the first CSI report, and the O-DU processes it.

[0502] In this embodiment, when the terminal device reports the first CSI report corresponding to M resources, based on the different codebook precision of the M resources, the CSI field corresponding to the first resource with higher precision is arranged before the CSI field corresponding to the second resource, so as to avoid the loss of the CSI field corresponding to the first resource and ensure the quality of CSI feedback.

[0503] In the above scheme, the CSI parameters corresponding to each of the M resources in Tables 14 to 31 and Tables 33 to 53 are reported one by one. This method is called independent reporting.

[0504] In another implementation, when each of the M resources has the same CSI parameter, the same CSI parameter can be reported as a common CSI parameter for the M resources. This method is called joint reporting.

[0505] For example, when the first resource includes multiple resources, the multiple resources in the first resource correspond to the same at least one first parameter; and / or, the multiple resources in the first resource correspond to the same at least one third parameter. Therefore, the multiple resources corresponding to the first resource have at least one first parameter and / or at least one third parameter that are the same, and can be jointly reported as common parameters.

[0506] For example, when the second resource includes multiple resources, the multiple resources in the second resource correspond to the same at least one second parameter; and / or, the multiple resources in the second resource correspond to the same at least one fourth parameter. Therefore, if the multiple resources corresponding to the second resource have at least one second parameter and / or at least one fourth parameter that are the same, they can be jointly reported as common parameters.

[0507] For example, when all PMIs in the first CSI report use the type I codebook, the format of the first CSI report corresponding to the M resources corresponds to the type I codebook. The format of the first CSI report can be found in Table 58.

[0508] For example, suppose the first resource contains two resources corresponding to CRI k0 and CRI k1 out of M resources. The resource corresponding to CRI k0 is the first resource out of the M resources, and the resource corresponding to CRI k1 is the second resource out of the M resources. The codebook precision of the first resource is higher than that of the second resource. The second resource contains the remaining M-2 resources. The codebook precision of the resource corresponding to CRI k2 is higher than that of the resource corresponding to CRI k3, the codebook precision of the resource corresponding to CRI k3 is higher than that of the resource corresponding to CRI k4, and so on. M-2 The codebook precision of the corresponding resource is higher than CRI k. M-1 The codebook precision of the corresponding resource. It should be understood that, in the case of joint reporting, the CSI parameters of resources with higher codebook precision are still ranked before the CSI parameters of resources with lower codebook precision.

[0509] The format of the first CSI report corresponding to M resources reported by the terminal device can be found in Table 58 below.

[0510] Table 58

[0511] As shown in Table 58, Part 1 may contain M CRIs, a joint RI, the broadband CQI of the first TB, and the subband differential CQI of the first TB. The joint RIs in Table 54 are joint CSI parameters. The joint RIs associated with the first resource are the common RIs of the first resource, and the RIs corresponding to each resource in the first resource are the joint RIs associated with the first resource in Table 54. Similarly, the joint RIs associated with the second resource are the common RIs of the second resource, and the RIs corresponding to each resource in the second resource are the joint RIs associated with the second resource in Table 54.

[0512] The first parameter corresponding to the first resource includes one or more of the following fields: CRI k0, CRI k1, joint RI, the first TB of broadband CQI, the first TB of subband differential CQI, and in the first parameter, the CSI field corresponding to the first resource among the M resources is arranged before the CSI field corresponding to the second resource. The joint RI associated with the first resource is the common RI corresponding to the first resource, and the terminal device arranges it as the first CSI field in the first parameter. Optionally, the joint RI associated with the first resource can also be arranged before CRI k0.

[0513] The second parameter corresponding to the second resource includes one or more of the following fields: CRI k2~CRI k M-1 The parameters are: a joint RI, the first TB of wideband CQI, and the first TB of subband differential CQI. Since the codebook precision of the first resource is higher than that of the second resource, all CSI fields in the first parameter are arranged before the CSI fields in the second parameter. In the second parameter, the order of CSI fields for the same CSI parameter corresponds to the order of codebook precision of the M-2 resources in the second resource. The joint RI associated with the second resource is the common RI corresponding to the second resource, and the terminal device arranges it first among the CSI fields in the second parameter. Optionally, the joint RI associated with the second resource can also be arranged before CRI k2.

[0514] Alternatively, the joint RI can be arranged before the CRI, as shown in Table 59.

[0515] Table 59

[0516] Considering the resource priority ordering within the first and second resources, apart from the joint RI, for the same CSI parameter, the CSI field ordering corresponding to the first resource corresponds to the priority ordering of the two resources in the first resource, and the CSI field ordering corresponding to the second resource corresponds to the priority ordering of the K-2 resources in the second resource.

[0517] It should be understood that Tables 58 and 59 are only examples of joint reporting of RI. It should be understood that when multiple resources in the first resource correspond to any one of the first or third parameters being the same, that parameter can be jointly reported. Similarly, when any one of the second and fourth parameters is the same, joint reporting can also be performed. For the CSI parameters of joint reporting, they are still sorted by codebook precision, as shown in Tables 58 and 59 above.

[0518] It should be understood that Tables 58 and 59 above are merely illustrative examples and should not be construed as limiting the embodiments of this application. Any reasonable modifications or additions to the contents of Tables 58 and 59 that result in new table contents fall within the protection scope of the embodiments of this application.

[0519] In the above scheme, the PMI corresponding to the first resource adopts a codebook of the first codebook type as the first codebook, and the PMI corresponding to the second resource adopts a codebook of the second codebook. This application also provides a method for determining the first reporting parameter, wherein the first reporting parameter includes one or more of the following: the number K of Channel State Information Reference Signal (CSI-RS) resources, the number P of CSI-RS resource ports, and the size of the Rank Indicator (RI). Specific interpretations are as follows.

[0520] (1) The number of CSI-RS resources;

[0521] In this application, the number of CSI-RS resources can be directly determined by the network device; or it can be determined by the network device based on historical information (or prior information); or it can be predefined or preconfigured. Optionally, if some beams cover fewer users, the network device may not configure CSI-RS resources for those beams to reduce overhead. For example, the number of CSI-RS resources can be 2, 4, or 8.

[0522] (2) Number of ports for CSI-RS resources;

[0523] In this application, the number of ports for CSI-RS resources can be directly determined by the network device; or it can be determined by the network device based on historical information (or prior information); or it can be predefined or preconfigured. Optionally, beams with good channel quality can use fewer ports, while beams with poor channel quality can use more ports. For example, the number of CSI-RS resources can be 8, 16, or 32.

[0524] It should be understood that when the number of CSI-RS resources in the CSI-RS resource set is less than or equal to 4, the maximum number of ports for each CSI-RS resource is 32; and / or, when the number of CSI-RS resources in the CSI-RS resource set is greater than 4 and less than or equal to 8, the maximum number of ports for each CSI-RS resource is 16.

[0525] Optionally, the terminal device can expand the number of ports of multiple CSI-RS resources by merging the ports of multiple CSI-RS resources according to communication needs. For example, if one CSI-RS resource has 32 ports, four CSI-RS resources can be expanded to 128 ports.

[0526] (3) The size of RI;

[0527] For example, the RI value can be 2, 4, or 8, representing the maximum number of streams transmitted. In this application, the RI value can be determined by the network device, for example, by historical information (or prior information) of the number of users covered by the simulated beam; or it can be predefined or preconfigured.

[0528] In the first implementation, when the codebook types of the first codebook and the second codebook are the same, the first reporting parameter can be determined based on the codebook types of the first codebook and the second codebook.

[0529] In general, for the size of RI, if the codebook type is Type I, 1 <= RI <= 8; if the codebook type is eType II, 1 ≤ RI ≤ 4. For the number of ports P of CSI-RS resources, if the codebook type is Type I, 1 ≤ P ≤ 32; if the codebook type is eType II, 1 ≤ P ≤ 16. For the number of CSI-RS resources K, if the codebook type is Type I, 1 ≤ K ≤ 8; if the codebook type is eType II, 1 ≤ K ≤ 4.

[0530] For example, for RI, if the codebook type is Type I, the value of RI can be 1, 2, 3, 4, ... 8; if the codebook type is eType II, the value of RI can be 1, 2, 3, 4. For the number of ports P of CSI-RS resources, if the codebook type is Type I, the value of P can be 1, 2, 3, 4, ... 32; if the codebook type is eType II, the value of P can be 1, 2, 3, 4, ... 16. For the number of CSI-RS resources K, if the codebook type is Type I, the value of K can be 1, 2, 3, ... 8; if the codebook type is eType II, the value of K can be 1, 2, 3, 4.

[0531] For example, the first reporting parameter can be determined with reference to Table 60. For instance, when the codebook type of the first resource is Type I, the number of CSI-RS resources corresponding to the first resource can be determined with reference to Table 60.

[0532] Table 60

[0533] As shown in Table 60, assuming the first reporting parameter includes the number of CSI-RS resources, then when the codebook type of the first resource is Type I Single-Panel Codebook and the first codebook parameter (i.e., the codebook precision of the first codebook type) is codebookMode = 1, WB, the number of CSI-RS resources K ≤ 2, or 2 < K ≤ 4, or 4 < K ≤ 8; or, when the codebook type of the first resource is Type I Single-Panel Codebook and the first codebook parameter is codebookMode = 2, WB, the number of CSI-RS resources K ≤ 2, or 2 < K ≤ 4, or 4 < K ≤ 8; or, when the codebook type of the first resource is Type I Single-Panel Codebook and the first codebook parameter is codebookMode = 1, SB, the number of CSI-RS resources K ≤ 2, or 2 < K ≤ 4, or 4 < K ≤ 8; or, when the codebook type of the first resource is Type I Single-Panel... When the first codebook parameter is codebookMode=1,SB, the number of CSI-RS resources K≤2, or 2<K≤4, or 4<K≤8.

[0534] In other words, the network device determines the number of CSI-RS resources corresponding to the beam sent to the terminal device based on the codebook type used when the configured terminal device provides feedback and the codebook precision corresponding to the first codebook parameter.

[0535] For example, if the codebook type of the first resource is Type I Single-Panel Codebook, when the corresponding first codebook parameter is codebookMode = 1,WB, the number of CSI-RS resources supported can be K ≤ 2; when the corresponding first codebook parameter is codebookMode = 1,SB, the number of CSI-RS resources supported can be 2 < K ≤ 4; when the corresponding first codebook parameter is codebookMode = 2,WB or codebookMode = 2,SB, the number of CSI-RS resources supported can be 4 < K ≤ 8. The codebook precision corresponding to codebookMode = 1,WB, codebookMode = 1,SB, codebookMode = 2,WB, and codebookMode = 2,SB increases sequentially.

[0536] It should be understood that high codebook accuracy results in a larger total number of CSI-RS resources transmitted by the corresponding network devices, or a larger number of CSI-RS resources associated with each analog beam, and a smaller number of CSI-RS resource ports corresponding to each CSI-RS resource; conversely, low codebook accuracy results in a smaller total number of CSI-RS resources transmitted by the corresponding network devices, or a larger number of CSI-RS resources associated with each analog beam, and a larger number of CSI-RS resource ports corresponding to each CSI-RS resource.

[0537] For example, when the codebook type of the first resource is Type I Single-Panel Codebook, and the first codebook parameter (i.e., the codebook precision of the first codebook type) is codebookMode = 1, WB, and the number of CSI-RS resources K ≤ 2, then the CSI report corresponding to the first resource can be as shown in Table 61. It should be understood that the first resource includes no more than 2 resources, and the first resource configured by the network device for the terminal device includes no more than 2 resources.

[0538] Table 61

[0539] For example, when the codebook type of the first resource is Type I Single-Panel Codebook, and the first codebook parameter is codebookMode = 2, WB, and the number of CSI-RS resources is 2 < K ≤ 4, then the CSI report corresponding to the first resource can be as shown in Table 62. It should be understood that the first resource includes 3 or 4 resources, and the first resource configured by the network device for the terminal device includes 3 or 4 resources. Table 62 uses an example where the first resource includes 3 resources.

[0540] Table 62

[0541] For example, when the codebook type of the first resource is eType II, the number of CSI-RS resources corresponding to the first resource is determined with reference to Table 63.

[0542] Table 63

[0543] As shown in Table 63, assuming the first reporting parameter includes the number of CSI-RS resources, when the codebook type of the first resource is eType II and the first codebook parameter is 1, the number of CSI-RS resources K≤2, or 2<K≤4; when the codebook type of the first resource is eType II and the first codebook parameter is 2, the number of CSI-RS resources K≤2, or 2<K≤4; similarly, when the codebook type of the first resource is eType II and the first codebook parameter is any one of 3-8, the number of CSI-RS resources K≤2, or 2<K≤4. In other words, the network device determines the number of CSI-RS resources corresponding to the beam sent to the terminal device based on the codebook type used by the configured terminal device when providing feedback and the codebook precision corresponding to the first codebook parameter.

[0544] In one implementation, when the first codebook type is eType II, the number of supported CSI-RS resources can be K≤2 or 2<K≤4. Generally, the larger the index value of paramCombination-r16 (e.g., the larger the value of L), the higher the codebook precision corresponding to the first codebook type.

[0545] It should be understood that high codebook accuracy results in a larger total number of CSI-RS resources transmitted by the corresponding network devices, or a larger number of CSI-RS resources associated with each analog beam, and a smaller number of CSI-RS resource ports corresponding to each CSI-RS resource; conversely, low codebook accuracy results in a smaller total number of CSI-RS resources transmitted by the corresponding network devices, or a larger number of CSI-RS resources associated with each analog beam, and a larger number of CSI-RS resource ports corresponding to each CSI-RS resource.

[0546] For example, when the codebook type of the first resource is eType II and the first codebook parameter is 1, and the number of CSI-RS resources K≤2, then the CSI report corresponding to the first resource can be as shown in Table 64. It should be understood that the first resource includes no more than 2 resources, and the first resource configured by the network device for the terminal device includes no more than 2 resources.

[0547] Table 64

[0548] For example, when the codebook type of the first resource is eType II and the first codebook parameter is 3, and the number of CSI-RS resources is 2 < K ≤ 4, then the CSI report corresponding to the first resource can be as shown in Table 65. It should be understood that the first resource includes 3 or 4 resources, and the first resource configured by the network device for the terminal device includes 3 or 4 resources. Table 65 takes an example where the first resource includes 3 resources.

[0549] Table 65

[0550] Exemplarily, when the codebook type of the first resource is Type I, determine the number of ports of the CSI-RS resource corresponding to the first resource according to Table 66.

[0551] Table 66

[0552] As shown in Table 66, assuming that the first reporting parameter includes the number of ports of the CSI-RS resource, when the codebook type of the first resource is Type I Single-Panel Codebook, regardless of what the first codebook parameter is, the number of ports of the CSI-RS resource is 2 < P ≤ 4, 4 < P ≤ 8, 8 < P ≤ 16, or 16 < P ≤ 32.

[0553] That is to say, the network device determines the number of ports of the CSI-RS resource according to the codebook type adopted by the configured terminal device for feedback and the codebook accuracy corresponding to what kind of first codebook parameter. [[ID=,14]]

[0554] In one implementation, when the first codebook type is Type I Single-Panel Codebook, when the corresponding first parameter is codebookMode = 1, WB, the number of ports of the CSI-RS resource supported can be 16 < P ≤ 32. When the corresponding first parameter is codebookMode = 1, SB, the number of ports of the CSI-RS resource supported can be 8 < P ≤ 16, or 4 < P ≤ 8. When the corresponding first parameter is codebookMode = 2, WB or codebookMode = 2, SB, the number of ports of the CSI-RS resource supported can be 2 < P <= 4. Among them, the codebook accuracies corresponding to codebookMode = 1, WB, codebookMode = 1, SB, codebookMode = 2, WB, and codebookMode = 2, SB increase in turn.

[0555] It should be understood that the lower the codebook accuracy of the first codebook type reported by the terminal device, the more the number of ports of the reported CSI-RS resource; on the contrary, the higher the codebook accuracy of the first codebook type reported, the fewer the number of ports of the reported CSI-RS resource.

[0556] Exemplarily, when the codebook type of the first resource is eType II, determine the number of ports of the CSI-RS resource corresponding to the first resource according to Table 67.

[0557] Table 67

[0558] As shown in Table 67, assuming that the first reporting parameter includes the number of ports of the CSI-RS resource, when the codebook type of the first resource is eType II, regardless of what the first codebook parameter is, the number of ports of the CSI-RS resource satisfies 2 < P ≤ 4, 4 < P ≤ 8, or 8 < P ≤ 16.

[0559] That is to say, the network device determines the number of ports of the CSI-RS resource according to the codebook type used for feedback by the configured terminal device and the codebook accuracy corresponding to what kind of first codebook parameter.

[0560] In one implementation, when the first codebook type is eType II, the supported number of ports of the CSI-RS resource can be 2 < P ≤ 4, 4 < P ≤ 8, or 8 < P ≤ 16. Generally, the larger the index value of paramCombination-r16 (for example, the larger the value of L), the higher the codebook accuracy corresponding to the first codebook type.

[0561] It should be understood that the lower the codebook accuracy of the first codebook type reported by the terminal device, the more ports of the CSI-RS resource are determined to be reported; conversely, the higher the codebook accuracy of the first codebook type reported, the fewer ports of the CSI-RS resource are determined to be reported.

[0562] Exemplarily, when the codebook type of the first resource is Type I, refer to Table 68 to determine the size of the RI corresponding to the first resource.

[0563] Table 68

[0564] As shown in Table 68, assuming that the first reporting parameter includes the size of the RI, when the codebook type of the first resource is Type I Single-Panel Codebook, regardless of what the first codebook parameter is, the size of the RI satisfies RI ≤ 2, or 2 < RI ≤ 4, or 4 < RI ≤ 8.

[0565] That is to say, the network device determines the size of the RI according to the codebook type used for feedback by the configured terminal device and the codebook accuracy corresponding to what kind of first codebook parameter.

[0566] In one implementation, when the first codebook type is Type I Single-Panel Codebook, the supported maximum RI can be 8 when the corresponding first codebook parameters are codebookMode=1,WB, codebookMode=1,SB, codebookMode=2,WB, or codebookMode=2,SB. For example, 2, 4, or 8. The codebook precision increases sequentially for codebookMode=1,WB, codebookMode=1,SB, codebookMode=2,WB, and codebookMode=2,SB. For example, if the first resource in Table 14 is CodebookMode=1, Type I Single-Panel codebook SB, then its corresponding RI can be 2 < RI ≤ 4.

[0567] It should be understood that the lower the precision of the codebook of the first codebook type reported by the terminal device, the larger the determined RI; conversely, the higher the precision of the codebook of the first codebook type reported, the smaller the determined RI.

[0568] For example, when the codebook type of the first resource is eType II, the size of the RI corresponding to the first resource is determined with reference to Table 69.

[0569] Table 69

[0570] As shown in Table 69, assuming that the first reporting parameter includes the size of RI, when the codebook type of the first resource is eType II, regardless of what the first codebook parameter is, the size of RI is RI≤2 or 2<RI≤4.

[0571] In other words, the network device determines the size of the RI based on the codebook type used by the configured terminal device when providing feedback and the codebook precision corresponding to the first codebook parameter.

[0572] In one implementation, when the first codebook type is eType II, the maximum supported RI can be 4, such as 1, 2, 3, or 4. Generally, the larger the index value of paramCombination-r16 (e.g., the larger the value of L), the higher the codebook precision corresponding to the first codebook type.

[0573] It should be understood that the lower the precision of the codebook of the first codebook type reported by the terminal device, the larger the determined RI; conversely, the higher the precision of the codebook of the first codebook type reported, the smaller the determined RI. For example, if the first resource in Table 33 is eType II (paramCombination-r16=5), then its corresponding RI can be 2<RI≤4.

[0574] It should be noted that Tables 60, 63, and 66 to 69 are merely examples for ease of understanding, and other solutions are not excluded. Optionally, this application does not limit the number (e.g., the number of rows in the table) of codebook types or the relationship between the first codebook parameter and the first reported parameter in any of Tables 60, 63, and 66 to 69. For example, the number of rows can be increased or decreased. Optionally, at least two of Tables 60, 63, and 66 to 69 can be merged into one table, or any of the above tables can be split into multiple independent tables for example. This application does not limit the splitting method.

[0575] In the second implementation, when the codebook types of the first codebook and the second codebook are different, the first reporting parameter can be determined based on a first condition. Specifically, the first condition may include one or more of the following conditions: 1≤RI≤4, 1≤P≤16, 1≤K≤4.

[0576] Based on the above scheme, the arrangement order of CSI fields is optimized, and the priority of multiple sets of CSI measurement results reported in the same CSI report is defined. This allows the terminal device to report CSI measurement results corresponding to beams with high codebook accuracy when uplink resources are limited, thereby improving the quality of CSI feedback.

[0577] Optionally, the parameters in Part 2 can be mapped to UCI bit sequences according to their order of arrangement. in, Mapped to CSI part 2 wideband corresponding to CSI report #1. Mapped to CSI part 2 wideband corresponding to CSI report #2. Mapped to CSI part 2 wideband corresponding to CSI report #3, ..., Mapped to CSI part 2 wideband corresponding to CSI report#n. Mapped to CSI part 2 subband corresponding to CSI report #1. Mapped to the CSI part 2 subband corresponding to CSI report#2, and so on.

[0578] Optionally, the parameters in Part 2 can be mapped to UCI bit sequences according to their order of arrangement. in, Mapped to CSI part 2 group 0 corresponding to CSI report#1 (i.e., group 0 contained in the second part of the CSI report). Mapped to CSI part 2 group 0 corresponding to CSI report #2. Mapped to CSI part 2 group 0, ..., corresponding to CSI report #3 Mapped to CSI part 2 group 0 corresponding to CSI report#n. Mapped to CSI Part 2 Group 1 and Group 2 corresponding to CSI report #1. Mapped to CSI part 2 group 1 and group 2 corresponding to CSI report #2, and so on.

[0579] Optionally, the parameters in Part 2 can be mapped to UCI bit sequences according to their order of arrangement. in, Mapped to CSI part 2 group 0 corresponding to CSI report#1 (i.e., group 0 contained in the second part of the CSI report). Mapped to CSI part 2 group 0 corresponding to CSI report #2. Mapped to CSI part 2 group 0, ..., corresponding to CSI report #3 Mapped to CSI part 2 group 0 corresponding to CSI report#n. Mapped to CSI part 2 wideband corresponding to CSI report #1. Mapped to CSI part 2 wideband corresponding to CSI report #2, ... Mapped to CSI part 2 group 0 corresponding to CSI report#n. Mapped to CSI part 2 wideband corresponding to CSI report #1. Mapped to CSI part2wideband corresponding to CSI report #2, ... Mapped to CSI part 2 wideband corresponding to CSI report#n. Mapped to CSI part 2 group 1 corresponding to CSI report #1. Mapped to CSI part 2 group 1, ..., corresponding to CSI report #2 Mapped to CSI part 2 group 1 corresponding to CSI report#n. Mapped to CSI part 2 subband corresponding to CSI report #1. Mapped to CSI part 2 subband corresponding to CSI report #2, ... Mapped to CSI part 2 subband corresponding to CSI report#n. Mapped to CSI part 2 group 2 corresponding to CSI report #1. Mapped to CSI part 2 group 2, ..., corresponding to CSI report #2 Mapped to CSI part 2 group 2 corresponding to CSI report#n. Mapped to CSI part 2 subband corresponding to CSI report #1. Mapped to CSI part2subband corresponding to CSI report#2, ..., and so on.

[0580] Optionally, the parameters in Part 2 can be mapped to UCI bit sequences according to their order of arrangement. in, Mapped to CSI part 2 group 0 corresponding to CSI report#1 (i.e., group 0 contained in the second part of the CSI report). Mapped to CSI part 2 group 0 corresponding to CSI report #2. Mapped to CSI part 2 group 0, ..., corresponding to CSI report #3 Mapped to CSI part 2 group 0 corresponding to CSI report#n. Mapped to CSI part 2 wideband corresponding to CSI report #1. Mapped to CSI part 2 wideband corresponding to CSI report #2, ... Mapped to CSI part 2 group 0 corresponding to CSI report#n. Mapped to CSI part 2 wideband corresponding to CSI report #1. Mapped to CSI part2wideband corresponding to CSI report #2, ... Mapped to CSI part 2 wideband corresponding to CSI report#n. Mapped to CSI part 2 group 1 corresponding to CSI report #1. Mapped to CSI part 2 group 1, ..., corresponding to CSI report #2 Mapped to CSI part 2 group 1 corresponding to CSI report#n. Mapped to CSI part 2 group 2 corresponding to CSI report #1. Mapped to CSI part 2 group 2, ..., corresponding to CSI report #2 Mapped to CSI part 2 group 2 corresponding to CSI report#n. Mapped to CSI part 2 subband corresponding to CSI report #1. Mapped to CSI part 2 subband corresponding to CSI report#2, and so on.

[0581] Optionally, the parameters in Part 2 can be mapped to UCI bit sequences according to their order of arrangement. in, Mapped to CSI part 2 group 0 corresponding to CSI report#1 (i.e., group 0 contained in the second part of the CSI report). Mapped to CSI part 2 group 0 corresponding to CSI report #2. Mapped to CSI part 2 group 0, ..., corresponding to CSI report #3 Mapped to CSI part 2 group 0 corresponding to CSI report#n. Mapped to CSI part 2 wideband corresponding to CSI report #1. Mapped to CSI part 2 wideband corresponding to CSI report #2, ... Mapped to CSI part 2 group 0 corresponding to CSI report#n. Mapped to CSI part 2 group 1 corresponding to CSI report #1. Mapped to CSI part 2 group 1, ..., corresponding to CSI report #2 Mapped to CSI part 2 group 1 corresponding to CSI report#n. Mapped to CSI part 2 group 2 corresponding to CSI report #1. Mapped to CSI part 2 group 2, ..., corresponding to CSI report #2 Mapped to CSI part 2 group 2 corresponding to CSI report#n. Mapped to CSI part 2 wideband corresponding to CSI report #1. Mapped to CSI part 2 wideband corresponding to CSI report #2, ... Mapped to CSI part 2 wideband corresponding to CSI report#n. Mapped to CSI part 2 subband corresponding to CSI report #1. Mapped to CSI part 2 subband corresponding to CSI report#2, and so on.

[0582] The communication method embodiments of this application have been described in detail above with reference to Figures 1 to 6. The communication device embodiments of this application will now be described in detail below with reference to Figures 7 and 8. It should be understood that the descriptions of the device embodiments correspond to the descriptions of the method embodiments; therefore, any parts not described in detail can be referred to the preceding method embodiments.

[0583] Figure 7 is a schematic block diagram of a communication device 1000 provided in an embodiment of this application. As shown in Figure 7, the communication device 1000 includes a processing module 1010 and a communication module 1020. The communication device 1000 can be a terminal-side device, or a communication device applied to or used in conjunction with a terminal-side device to implement a method executed on the terminal-side device, such as a chip, chip system, or circuit; or, the communication device 1000 can be a network-side device, or a communication device applied to or used in conjunction with a network-side device to implement a method executed on the network-side device, such as a chip, chip system, or circuit.

[0584] The communication module can also be called a transceiver module, transceiver, transceiver unit, or transceiver device. The processing module can also be called a processor, processing board, processing unit, or processing device. Optionally, the communication module is used to perform the sending and receiving operations on the terminal side and network side in the above method. The device in the communication module that implements the receiving function can be considered a receiving unit, and the device in the communication module that implements the sending function can be considered a sending unit; that is, the communication module includes a receiving unit and a sending unit.

[0585] Optionally, the communication device 1000 may further include a storage module 1001 for storing device program code and / or data.

[0586] In one example, when the communication device 1000 is applied to the terminal side, for example, it is a terminal or a communication module in the terminal, or a circuit or chip in the terminal that is responsible for communication functions.

[0587] The processing module 1010 can be used to implement the processing function on the terminal side in the above embodiments, and the communication module 1020 can be used to implement the sending and receiving function on the terminal side in the above embodiments.

[0588] The terminal side includes terminal devices, or chips or circuits in the terminal devices (such as modem chips, also known as baseband chips, or system-on-chip (SoC) chips or system-in-package (SIP) chips containing modem cores), or functional modules in the terminal devices that can call and execute programs.

[0589] In one possible design, when the communication device 1000 is a terminal or a communication module within a terminal, the functionality of the processing module 1010 can be implemented by one or more processors. Specifically, the processor may include a modem chip, or a system-on-a-chip (SoC) or SIP chip containing a modem core. The functionality of the communication module 1020 can be implemented by transceiver circuitry.

[0590] In one possible design, when the communication device 1000 is a circuit or chip in a terminal responsible for communication functions, such as a modem chip or a system-on-a-chip (SoC) or SIP chip containing a modem core, the function of the processing module 1210 can be implemented by a circuit system in the aforementioned chip that includes one or more processors or processor cores. The function of the communication module 1220 can be implemented by interface circuits or data transceiver circuits on the aforementioned chip.

[0591] In one example, when the communication device 1000 is applied to the network side, it is for example, a network device or a communication module in a network device, or a circuit or chip in a terminal responsible for communication functions. The processing module 1010 can be used to implement the network-side processing functions in the above embodiments, and the communication module 1020 can be used to implement the network-side transmit and receive functions in the above embodiments.

[0592] The network side includes network devices, or chips or circuits within network devices, or central units (CUs) or distributed units (DUs) within network devices, or functional modules within network devices that can call and execute programs.

[0593] Furthermore, it should be noted that the aforementioned communication module and / or processing module can be implemented through virtual modules. For example, the processing module can be implemented through software functional units or virtual devices, and the communication module can be implemented through software functions or virtual devices. Alternatively, the processing module or communication module can also be implemented through physical devices, such as chips / circuits (e.g., integrated circuits or logic circuits). The communication module can be an input / output circuit and / or a communication interface, performing input operations (corresponding to the aforementioned receiving operation) and output operations (corresponding to the aforementioned sending operation); the processing module is an integrated processor, microprocessor, or circuit (e.g., integrated circuits or logic circuits).

[0594] It is understood that the division of units in the above-described device is merely a logical functional division. Each function can correspond to a functional unit, or two or more functions can be integrated into one functional unit. In actual implementation, all or some units can be integrated into a single physical entity, or they can be distributed across different physical entities. Furthermore, the aforementioned functional units can be implemented in hardware, software, or a combination of both. Whether a function is executed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art 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.

[0595] The module division in this application is illustrative and represents only one logical functional division. In actual implementation, other division methods are possible. Furthermore, the functional modules in the various examples of this application can be integrated into a single processor, exist as separate physical entities, or be integrated into a single module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0596] Figure 8 is a schematic block diagram of a communication device 2000 provided in an embodiment of this application. Optionally, the communication device 2000 may be a chip or a chip system. Optionally, in this application, the chip system may be composed of chips or may include chips and other discrete devices.

[0597] As shown in Figure 7, the communication device 2000 can be used to implement the functions of any device (e.g., terminal device, network device) in the communication system described in the foregoing examples. The communication device 2000 may include at least one processor 2010. Optionally, the processor 2010 is coupled to a memory, which may be located within the device, integrated with the processor, or located outside the device. For example, the communication device 2000 may also include at least one memory 2020. The memory 2020 stores the computer programs, instructions, and / or data necessary for implementing any of the above examples; the processor 2010 may execute the computer programs stored in the memory 2020 to complete the methods in any of the above examples.

[0598] The communication device 2000 may also include a communication interface 2030, through which the communication device 2000 can interact with other devices. For example, the communication interface 2030 may be a transceiver, circuit, bus, module, pin, or other type of communication interface. When the communication device 2000 is a chip-based device or circuit, the communication interface 2030 in the device 2000 may also be an input / output circuit, capable of inputting information (or receiving information) and outputting information (or sending information). The processor 2010 may be an integrated processor, microprocessor, integrated circuit, or logic circuit, etc., and the processor can determine the output information based on the input information.

[0599] In one example, when the communication device 2000 is applied to the terminal side, the processor 2010 can be used to implement the processing functions of the terminal side in the above embodiments, and the communication interface 2030 can be used to implement the sending and receiving functions of the terminal side in the above embodiments.

[0600] The terminal side includes terminal devices, or chips or circuits in the terminal devices (such as modem chips, also known as baseband chips, or system-on-chip (SoC) chips or system-in-package (SIP) chips containing modem cores), or functional modules in the terminal devices that can call and execute programs.

[0601] In another example, when the communication device 2000 is applied to the network side, the processor 2010 can be used to implement the network side processing functions in the above embodiments, and the communication interface 2030 can be used to implement the network side sending and receiving functions in the above embodiments.

[0602] The network side includes network devices, or chips or circuits within network devices, or central units (CUs) or distributed units (DUs) within network devices, or functional modules within network devices that can call and execute programs.

[0603] The coupling in this application refers to indirect coupling or communication connection between devices, units, or modules, which can be electrical, mechanical, or other forms, used for information exchange between devices, units, or modules. The processor 2010 may operate in conjunction with the memory 2020 and the communication interface 2030. This application does not limit the specific connection medium between the processor 2010, the memory 2020, and the communication interface 2030.

[0604] Optionally, as shown in FIG8, the processor 2010, the memory 2020, and the communication interface 2030 are interconnected via a bus 2040. Optionally, the bus may include buses of the types such as address bus, data bus, and control bus. Furthermore, for ease of illustration, FIG8 shows one bus 2040, but does not indicate that there is only one bus or only one type of bus.

[0605] It should be understood that the processor mentioned in the embodiments of this application can be one of the following devices or a portion of the circuitry used for processing functions: a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0606] It should also be understood that the memory mentioned in the embodiments of this application can be volatile memory and / or non-volatile memory. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM includes the following forms: static random access memory (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 linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0607] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) can be integrated into the processor.

[0608] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0609] This application also provides a computer-readable storage medium storing computer instructions for implementing the methods executed by a communication device (such as a network side or a terminal side) in the above-described method embodiments.

[0610] This application also provides a computer program product comprising instructions which, when executed by a computer, implement the methods performed by a communication device (such as a network side or a terminal side) in the above-described method embodiments.

[0611] This application also provides a communication system, which includes the network side and / or terminal side described in the above embodiments.

[0612] The explanations and beneficial effects of the relevant contents in any of the devices provided above can be found in the corresponding method embodiments provided above, and will not be repeated here.

[0613] In the various embodiments of this application, the order of the above-mentioned processes does not imply 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 this application.

[0614] In this application, examples may reference each other without logical contradiction. For example, methods and / or terms between method embodiments may reference each other, functions and / or terms between device embodiments may reference each other, and functions and / or terms between device examples and method examples may reference each other.

[0615] It should be understood that the above embodiments are mainly illustrated using devices in existing network architectures as examples, and the specific form of the devices is not limited in the embodiments of this application. For example, any device that can achieve the same function in the future is applicable to the embodiments of this application.

[0616] Those skilled in the art will recognize that the units and algorithm steps of the various examples 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 implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art 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.

[0617] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

[0618] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0619] The units described as separate components may or may not be physically separate. 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 the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0620] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0621] If the aforementioned functions are implemented as 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 essential contributing part of the technical solution of this application, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, external hard drives, ROM, RAM, magnetic disks, or optical disks.

[0622] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A communication method, characterized in that, include: A first Channel State Information (CSI) report is determined based on M reference signal resources, wherein the M reference signal resources include a first resource and a second resource, the first codebook parameters of the codebook used by the first resource and the codebook used by the second resource are different, and the first resource and the second resource each include one or more resources, wherein... The first CSI report includes a first parameter and a second parameter. The first parameter corresponds to a first resource, and the second parameter corresponds to a second resource. The first parameter is listed before the second parameter. The first parameter includes at least one of the following parameters: Channel State Information Reference Signal Resource Indicator (CRI), Rank Indicator (RI), Wideband Channel Quality Indicator (CQI) for the first transport block (TB), Subband Differential CQI for the first TB, and Selected L n Value indication, selected L n Indicator of value combination and indicator of the sum of all non-zero coefficients of all layers, K NZ The second parameter includes at least one of the following parameters: CRI, RI, broadband CQI of the first TB, subband differential CQI of the first TB, and selected L. n Value indication, selected L n Indicator of value combination and indicator of the sum of all non-zero coefficients of all layers, K NZ ; and / or, The first CSI report includes a third parameter and a fourth parameter. The third parameter is a parameter corresponding to the first resource, and the fourth parameter is a parameter corresponding to the second resource. The third parameter is listed before the fourth parameter. The third parameter includes at least one of the following parameters: Layer Indicator (LI), Wideband Precoding Matrix Indicator (PMI), Wideband CQI of the second TB, Subband Differential PMI, Subband Differential CQI of the second TB, PMI field X1, the first part of PMI field X2, and the second part of PMI field X2. The fourth parameter includes at least one of the following parameters: Layer Indicator (LI), Wideband Precoding Matrix Indicator (PMI), Wideband CQI of the second TB, Subband Differential PMI, Subband Differential CQI of the second TB, PMI field X1, the first part of PMI field X2, and the second part of PMI field X2. Send the first CSI report.

2. A communication method, characterized in that, include: A first Channel State Information (CSI) report is received. This first CSI report is determined based on M reference signal resources, including a first resource and a second resource. The first codebook parameters used by the first resource and the second resource are different. The first CSI report includes a first parameter and a second parameter. The first parameter corresponds to a first resource, and the second parameter corresponds to a second resource. The first parameter is listed before the second parameter. The first parameter includes at least one of the following parameters: Channel State Information Reference Signal Resource Indicator (CRI), Rank Indicator (RI), Wideband Channel Quality Indicator (CQI) for the first transport block (TB), Subband Differential CQI for the first TB, and Selected L n Value indication, selected L n Indicator of value combination and indicator of the sum of all non-zero coefficients of all layers, K NZ The second parameter includes at least one of the following parameters: CRI, RI, broadband CQI of the first TB, subband differential CQI of the first TB, and selected L. n Value indication, selected L n Indicator of value combination and indicator of the sum of all non-zero coefficients of all layers, K NZ ; and / or, The first CSI report includes a third parameter and a fourth parameter. The third parameter is a parameter corresponding to the first resource, and the fourth parameter is a parameter corresponding to the second resource. The third parameter is listed before the fourth parameter. The third parameter includes at least one of the following parameters: Layer Indicator (LI), Wideband Precoding Matrix Indicator (PMI), Wideband CQI of the second TB, Subband Differential PMI, Subband Differential CQI of the second TB, PMI field X1, the first part of PMI field X2, and the second part of PMI field X2. The fourth parameter includes at least one of the following parameters: Layer Indicator (LI), Wideband Precoding Matrix Indicator (PMI), Wideband CQI of the second TB, Subband Differential PMI, Subband Differential CQI of the second TB, PMI field X1, the first part of PMI field X2, and the second part of PMI field X2.

3. The method according to claim 1 or 2, characterized in that, The first codebook parameter is used to characterize the codebook accuracy.

4. The method according to any one of claims 1 to 3, characterized in that, The third parameter includes a fifth parameter, the fourth parameter includes a sixth parameter, the fifth parameter is arranged before the sixth parameter, and the fifth parameter includes at least one of the following parameters: layer indicator LI, wideband precoding matrix indicator PMI, wideband CQI of the second TB and PMI field X1. The sixth parameter includes at least one of the following parameters: layer indicator LI, wideband precoding matrix indicator PMI, wideband CQI of the second TB and PMI field X1.

5. The method according to claim 4, characterized in that, The third parameter includes a seventh parameter, and the fourth parameter includes an eighth parameter. The seventh parameter is arranged before the eighth parameter. The seventh parameter includes at least one of the following parameters: the PMI subband information field X2 corresponding to the even-numbered subband, the subband differential CQI of the second TB corresponding to the even-numbered subband, and the first part of the PMI field X2. The eighth parameter includes at least one of the following parameters: the PMI subband information field X2 corresponding to the even-numbered subband, the subband differential CQI of the second TB corresponding to the even-numbered subband, and the first part of the PMI field X2.

6. The method according to claim 5, characterized in that, The third parameter includes the ninth parameter, and the fourth parameter includes the tenth parameter. The ninth parameter is arranged before the tenth parameter. The ninth parameter includes at least one of the following parameters: the PMI subband information field X2 corresponding to the odd-numbered subband, the subband differential CQI of the second TB corresponding to the odd-numbered subband, and the second part of the PMI field X2. The tenth parameter includes at least one of the following parameters: the PMI subband information field X2 corresponding to the odd-numbered subband, the subband differential CQI of the second TB corresponding to the odd-numbered subband, and the second part of the PMI field X2.

7. The method according to any one of claims 1 to 6, characterized in that, The first parameter also includes at least one of the third parameters.

8. The method according to any one of claims 1 to 7, characterized in that, The third parameter also includes at least one of the second parameters.

9. The method according to any one of claims 1 to 8, characterized in that, The first codebook parameters used by the first resource and the second resource are different, including: The codebooks used by the first resource and the codebooks used by the second resource are of different types.

10. The method according to any one of claims 1 to 9, characterized in that, The PMI corresponding to the first resource uses a codebook of the first codebook type as the first codebook, while the PMI corresponding to the second resource uses a codebook of the second codebook. When the first codebook and the second codebook have the same codebook type, the method further includes: A first reporting parameter is determined based on the codebook types of the first codebook and the second codebook, and the first reporting parameter includes one or more of the following: The number of Channel State Information Reference Signal (CSI-RS) resources, the number of ports of CSI-RS resources, and the size of the Rank Indicator (RI).

11. The method according to any one of claims 1 to 9, characterized in that, The PMI corresponding to the first resource uses a codebook of the first codebook type as the first codebook, while the PMI corresponding to the second resource uses a codebook of the second codebook. When the codebook types of the first codebook and the second codebook are different, the method further includes: A first reporting parameter is determined based on a first condition, and the first reporting parameter includes one or more of the following: The number of Channel State Information Reference Signal (CSI-RS) resources, the number of ports of CSI-RS resources, and the size of the Rank Indicator (RI).

12. A communication device, characterized in that, Includes modules or units for performing the method of any one of claims 1 to 11.

13. A communication device, characterized in that, It includes a processor coupled to a memory that stores instructions which, when executed by the processor, cause the communication device to perform the method as claimed in any one of claims 1 to 11.

14. A computer-readable storage medium, characterized in that, A computer-readable storage medium is used to store a computer program that, when run on a computer, causes the computer to perform the method as claimed in any one of claims 1 to 11.

15. A computer program product, characterized in that, When a computer program product is run on a computer, it causes the computer to perform the method as claimed in any one of claims 1 to 11.

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