WO2025208598A1 - Channel state information (csi) measurement and reporting method, and wireless communication device - Google Patents

Abstract

Provided in the present disclosure is a channel state information (CSI) measurement and reporting method. The method comprises: a user equipment receiving selected antenna ports in first indication information that correspond to several CSI reference signal (CSI-RS) resources, or the number of selected antenna ports in the first indication information that correspond to the several CSI-RS resources; on the basis of the first indication information and/or a predefined constraint, the user equipment determining an antenna port to be selected, wherein the antenna port can be selected in advance; then, on the basis of the first indication information and/or the predefined constraint, and received second indication information, which is used for indicating a supported codebook parameter or a combination of codebook parameters, the user equipment calculating CSI and reporting the CSI. In this way, overheads for selection and reporting by means of a user equipment are reduced.

Description

A method for measuring and reporting channel state information (CSI) and wireless communication equipment Technical Field

The present disclosure relates to the field of wireless communications, and in particular to a method for measuring and reporting channel state information (CSI) and a wireless communication device.

Background Art

With the continuous development of some emerging applications, the demand for communication capacity is becoming increasingly greater. MIMO technology is one of the key technologies for improving network capacity. To cope with the increasing network demand, MIMO technology tends to adopt larger-scale antenna arrays. Currently, antenna arrays in the mainstream market for 5G intermediate frequency bands are gradually expanding. More transmit and receive RF channels can provide more vertical degrees of freedom and greater antenna gain. However, in the application scenario of larger antenna arrays, the maximum number of 32 antenna ports supported by a single CSI-RS resource in the existing technology cannot meet the demand. Therefore, it is necessary to propose a channel state information measurement and reporting method and wireless communication device for more antenna ports to improve the problems of the existing technology and other issues.

Summary of the Invention

The technical problem to be solved by the present disclosure is to provide a method for measuring and reporting channel state information (CSI) in response to the above-mentioned defects of the prior art, aiming to solve the problem in the prior art that CSI measurement and reporting cannot support a larger number of antenna ports.

According to one aspect of the present disclosure, a method for measuring and reporting channel state information (CSI) is provided, which is executed on a user equipment and includes:

receiving first indication information and second indication information, wherein the first indication information indicates selected antenna ports corresponding to a number of channel state information reference signal (CSI-RS) resources or the number of selected antenna ports corresponding to a number of CSI-RS resources, and the total number of antenna ports corresponding to the number of CSI-RS resources is greater than a predefined threshold; and the second indication information is used to indicate supported codebook parameters or codebook parameter combinations;

Determining an antenna port to be selected based on the first indication information and/or predefined constraints;

Based on the first indication information and/or the predefined constraint and the second indication information, CSI is calculated and reported.

According to one aspect of the present disclosure, a method for measuring and reporting channel state information (CSI) is provided, which is executed on a user equipment. The method includes:

receiving channel state information reference signal (CSI-RS) resource configuration information for channel measurement and/or interference measurement, wherein the CSI-RS resource configuration information includes at least one CSI-RS resource set, the at least one CSI-RS resource set includes multiple CSI-RS resource groups, and the total number of antenna ports corresponding to each CSI-RS resource group is greater than a first predefined threshold; two consecutive CSI-RS resources are located in the same or adjacent time slots; and all CSI-RS resources are triggered based on the same trigger instance;

Based on the codebook parameter information or the codebook parameter combination information and the CSI-RS resource configuration information, channel state information CSI is calculated and reported.

According to one aspect of the present disclosure, a method for measuring and reporting channel state information (CSI) is provided, which is executed on a user equipment. The method includes:

receiving channel state information reference signal CSI-RS resource configuration information for channel measurement; wherein the CSI-RS resources corresponding to the CSI-RS resource configuration information are divided into a plurality of CSI-RS resource groups;

Based on the CSI-RS resource configuration information, at least one channel state information CSI reporting instance is reported, wherein one CSI reporting instance corresponds to one CSI-RS resource group, and a total number of antenna ports corresponding to the multiple CSI-RS resources is greater than a predefined threshold.

According to one aspect of the present disclosure, a method for measuring and reporting channel state information (CSI) is provided, which is executed by a base station. The method includes:

Sending first indication information and second indication information, wherein the first indication information indicates selected antenna ports corresponding to a number of channel state information reference signal (CSI-RS) resources or the number of selected antenna ports corresponding to a number of CSI-RS resources, and the total number of antenna ports corresponding to the number of CSI-RS resources is greater than a predefined threshold; and the second indication information is used to indicate supported codebook parameters or codebook parameter combinations;

The receiving terminal feeds back channel state information CSI, recovers precoding information according to the received CSI, and sends data or control information based on the precoding information.

According to one aspect of the present disclosure, a method for measuring and reporting channel state information (CSI) is provided, which is executed by a base station. The method includes:

Sending channel state information reference signal (CSI-RS) resource configuration information for channel measurement and/or interference measurement, wherein the CSI-RS resource configuration information includes at least one CSI-RS resource set, the at least one CSI-RS resource set includes multiple CSI-RS resource groups, and the total number of antenna ports corresponding to each CSI-RS resource group is greater than a predefined threshold; two consecutive CSI-RS resources are located in the same or adjacent time slots; all CSI-RS resources are triggered based on the same trigger instance; and the predefined threshold is 32;

The receiving terminal feeds back channel state information CSI, recovers precoding information according to the received CSI, and sends data or control information based on the precoding information.

According to one aspect of the present disclosure, a method for measuring and reporting channel state information (CSI) is provided, which is executed by a base station. The method includes:

Sending channel state information reference signal CSI-RS resource configuration information for channel measurement; wherein the CSI-RS resources corresponding to the CSI-RS resource configuration information are divided into multiple CSI-RS resource groups;

At least one channel state information (CSI) reporting instance is received, wherein one CSI reporting instance corresponds to one CSI-RS resource group, and a total number of antenna ports corresponding to the plurality of CSI-RS resources is greater than a predefined threshold.

The receiving terminal feeds back channel state information CSI, recovers precoding information according to the received CSI, and sends data or control information based on the precoding information.

According to one aspect of the present disclosure, a wireless communication device is provided, comprising a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the steps in the data processing method as described in any one of the above items.

The beneficial effects of the present disclosure are as follows: the user equipment receives the antenna ports corresponding to several channel state information reference signal CSI-RS resources or the number of antenna ports corresponding to several CSI-RS resources selected in the first indication information, and the user equipment determines the antenna port to be selected based on the first indication information and/or predefined constraints, and can select the antenna port in advance. Then, the user equipment calculates the CSI and reports the CSI based on the first indication information and/or predefined constraints, and receives the second indication information for indicating supported codebook parameters or codebook parameter combinations, thereby reducing the overhead of the user equipment in selecting and reporting, and reducing the computational complexity of the user equipment.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present disclosure or related technologies, the following drawings will be briefly introduced in the embodiments. Obviously, the drawings are only some embodiments of the present disclosure, and ordinary technicians in this field can derive other drawings based on these drawings without inventive work.

FIG1 is a schematic diagram illustrating a wireless communication system architecture provided by the present disclosure.

FIG2 illustrates one of the schematic diagrams of the method for measuring and reporting channel state information (CSI) provided in the present disclosure.

FIG3 illustrates a second schematic diagram of the method for measuring and reporting channel state information (CSI) provided in the present disclosure.

FIG4 illustrates a third schematic diagram of the method for measuring and reporting channel state information (CSI) provided in the present disclosure.

FIG5 illustrates a fourth schematic diagram of the method for measuring and reporting channel state information (CSI) provided in the present disclosure.

FIG6 is a schematic diagram illustrating a combination of antenna parameters used for channel state information interference measurement provided by the present disclosure.

FIG7 illustrates a fifth schematic diagram of the method for measuring and reporting channel state information (CSI) provided in the present disclosure.

FIG8 illustrates a sixth schematic diagram of the method for measuring and reporting channel state information (CSI) provided in the present disclosure.

FIG9 is a schematic diagram illustrating the mapping relationship between resources and ports provided by the present disclosure.

FIG10 illustrates an exemplary block diagram of a wireless communication system provided by the present disclosure.

DETAILED DESCRIPTION

The embodiments of the present disclosure describe technical matters, structural features, objectives and effects in detail with reference to the accompanying drawings, as described below. Specifically, the terms in the embodiments of the present disclosure are only used to describe the purpose of specific embodiments, rather than to limit the present disclosure.

The relevant technical terms in this article are explained as follows:

In this disclosure, "A or B" may mean "only A," "only B," or "both A and B."

In other words, in the present disclosure, "A or B" may be interpreted as "A and/or B." For example, in the present disclosure, "A, B or C" may mean "only A," "only B," "only C," or "any combination of A, B, and C."

As used in this disclosure, a slash (/) or a comma may mean "and/or". For example, "A/B" may mean "A and/or B". Thus, "A/B" may mean "only A", "only B", or "both A and B". For example, "A, B, C" may mean "A, B, or C".

In the present disclosure, “at least one of A and B” may mean “only A”, “only B”, or “both A and B”. In addition, in the present disclosure, the expression “at least one of A or B” or “at least one of A and/or B” may be interpreted as “at least one of A and B”.

In addition, in the present disclosure, “at least one of A, B, and C” may mean “only A,” “only B,” “only C,” or “any combination of A, B, and C.” In addition, “at least one of A, B, or C” or “at least one of A, B, and/or C” may mean “at least one of A, B, and C.”

Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

Those skilled in the art will recognize and appreciate that the details of the described examples are merely illustrative of some embodiments and that the teachings set forth herein are applicable to various alternative arrangements.

The technical method disclosed herein can be applied to various wireless communication systems, such as: Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, 5G communication system or future wireless communication systems, etc.

Exemplarily, a wireless communication system 100 applied in the present disclosure is shown in FIG1 . The wireless communication system 100 may include a base station 110, which may be a device that communicates with a user equipment 120 (User Equipment, UE). The base station 110 may provide communication coverage for a specific geographical area and may communicate with user equipment located within the coverage area. Optionally, the base station 110 may be an evolved base station (eNB or eNodeB) in an LTE system, or the base station may be a mobile switching center, a relay station, an access point, an in-vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a base station in a future communication system.

The wireless communication system 100 also includes at least one user equipment 120 located within the coverage area of the base station 110. As used herein, "user equipment" includes, but is not limited to, a device configured to receive/send communication signals via a wired connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection; and/or another data connection/network; and/or via a wireless interface, such as for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and/or another user equipment; and/or an Internet of Things (IoT) device. User equipment configured to communicate via a wireless interface may be referred to as a "wireless communication user equipment,""wireless user equipment," or "mobile user equipment." Examples of mobile user equipment include, but are not limited to, satellite or cellular phones; Personal Communications System (PCS) user equipment that may combine a cellular radio telephone with data processing, fax, and data communication capabilities; and mobile devices that may include radio telephones, search engines, and other similar devices. A PDA with a pager, Internet/intranet access, a web browser, a notepad, a calendar, and/or a Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers or other electronic devices including a radiotelephone transceiver. User equipment may refer to an access user device, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote user device, a mobile device, a wireless communication device, or a user agent. An access user device may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a user device in a 5G network, or a user device in a future evolved PLMN, etc.

Optionally, user devices 120 can perform direct user device communication (Device to Device, D2D) between each other.

Optionally, the 5G communication system or 5G network can also be referred to as a New Radio (NR) system or NR network.

The wireless communication system 100 also includes a core network 130. Core network 130 may be an IP mobile communication network operated by a mobile communication operator. For example, core network 130 may be a core network used by a mobile communication operator that operates and manages the wireless communication system 100, or may be a core network used by a virtual mobile communication operator such as an MVNO (Mobile Virtual Network Operator).

The core network 130 can be connected to the base station 110 and serve as a relay device for transmitting user data. The user equipment 120 transmits and receives user data via the core network 130. It should be noted that the communication of user data is not limited to IP communication and can also be non-IP communication.

FIG1 exemplarily shows a base station 110 , two user equipments 120 and a core network 130 . Optionally, the wireless communication system 100 may include multiple base stations and each base station may include other numbers of user equipments within its coverage area, which is not limited in the present disclosure.

Optionally, the wireless communication system 100 may further include other network entities such as a network controller, a mobility management entity, and a network element, which is not limited in this disclosure. For example, the core network 130 may include other network entities such as a network controller, a mobility management entity, and a network element, which is not limited in this disclosure.

It should be understood that in this disclosure, a device with wireless communication capabilities in a network/system may be referred to as a wireless communication device. Taking the wireless communication system 100 shown in Figure 1 as an example, the wireless communication device may include a base station 110 with communication capabilities, a user device 120, and a core network 130. The base station 110 and the user device 120 may be the specific devices described above and will not be described in detail here. The wireless communication device may also include other devices in the wireless communication system 100 (core network 130). For example, the core network 130 may include other network entities such as a network controller and a mobility management entity, but this disclosure does not limit this.

The information sending method provided by the embodiment of the present application is described in detail below through some embodiments and their application scenarios in combination with the accompanying drawings.

For the R17 port selection codebook, the existing technology has agreed to support the number of antenna ports of {48, 64}. So how to design a specific codebook method for Rel-17 codebook enhancement? The issues involved include: (1) indication of port selection; (2) configuration of codebook parameters; (3) adaptation of CPU occupancy rules. To solve the above problems, the present disclosure adopts the following method.

FIG2 illustrates one of the flow charts of the method for measuring and reporting channel state information (CSI) provided by the present disclosure. As shown in FIG2 , the method can be applied to user equipment 120. The method includes:

Step S100: Receive first indication information and second indication information, wherein the first indication information indicates selected antenna ports corresponding to a number of channel state information reference signal (CSI-RS) resources or the number of selected antenna ports corresponding to a number of CSI-RS resources, and the total number of antenna ports corresponding to the number of CSI-RS resources is greater than a predefined threshold; and the second indication information is used to indicate supported codebook parameters or codebook parameter combinations;

Step S200: Determine an antenna port to be selected based on the first indication information and/or predefined constraints;

Step S300: Calculate CSI based on the first indication information and/or predefined constraints and the second indication information and report the CSI.

FIG3 illustrates one of the flow charts of the method for measuring and reporting channel state information CSI provided by the present disclosure, as shown in FIG3 As shown, the method can be applied to the base station 110. The method includes:

Step H100: Send first indication information and second indication information, wherein the first indication information indicates selected antenna ports corresponding to a number of channel state information reference signal (CSI-RS) resources or the number of selected antenna ports corresponding to a number of CSI-RS resources, and the total number of antenna ports corresponding to the number of CSI-RS resources is greater than a predefined threshold; and the second indication information is used to indicate supported codebook parameters or codebook parameter combinations.

Step H200: Receive channel state information CSI fed back by the terminal, recover precoding information based on the received CSI, and send data or control information based on the precoding information.

Specifically, the user equipment 120 receives the selected antenna ports corresponding to several channel state information reference signal CSI-RS resources or the selected number of antenna ports corresponding to several CSI-RS resources in the first indication information of the base station 110. The user equipment 120 determines the antenna port to be selected based on the first indication information and/or predefined constraints, and can select the antenna port in advance. Then, the user equipment 120 calculates the CSI and reports the CSI to the base station 110 based on the first indication information and/or predefined constraints, and the second indication information of the base station 110 for indicating the supported codebook parameters or codebook parameter combinations, thereby reducing the processing complexity of the user equipment 120 and the reporting overhead of the user equipment 120.

Embodiments 1 to 3 are some specific implementations of Figures 2 and 3.

Example 1

This embodiment primarily addresses the antenna port selection issue when using a codebook method that combines a Rel-17 port selection codebook with multiple CSI-RS resources to support a maximum of 128 antenna ports. Since the Rel-17 port selection codebook primarily utilizes the angle delay reciprocity of uplink and downlink channels, when the Rel-17 port selection codebook combines multiple CSI-RS resources to support a maximum of 128 antenna ports, the base station 110 adds precoding information to the downlink CSI-RS signal based on the angle delay pair information obtained from uplink channel estimation when transmitting the downlink CSI-RS reference signal. This allows the base station 110 to obtain some angle delay pair information in advance relative to the user equipment 120. When a large number of antenna ports are supported, the quality of the channels corresponding to some angle delay pair information may be relatively poor. Therefore, when adding precoding to the downlink CSI-RS reference signal, the base station 110 can select some angle delay pairs or CSI-RS antenna ports in advance, thereby reducing the overhead of user equipment 120 in selecting and reporting. The method by which the base station 110 indicates the selected antenna port may be at least one of the following:

Method 1:

In some embodiments, the predefined threshold is 32. In some embodiments, when the first indication information indicates the selected antenna ports corresponding to a plurality of channel state information reference signal (CSI-RS) resources, the antenna ports are indicated using a bitmap, and different polarization directions corresponding to all CSI-RS resources share the same bitmap, thereby saving indication overhead. In some embodiments, when the first indication information indicates the selected antenna ports corresponding to a plurality of channel state information reference signal (CSI-RS) resources, the antenna ports are indicated using a combination number, and different polarization directions corresponding to all CSI-RS resources share the same combination number, thereby saving indication overhead.

Specifically, the base station 110 indicates to the user equipment 120 through downlink signaling (i.e., the first indication information) which antenna ports corresponding to the CSI-RS resources have been selected, and the user equipment 120 further selects the CSI-RS antenna port from the remaining ports to be selected based on the first indication information of the base station 110. The user equipment 120 may also not select the antenna port; for example, the total number of CSI-RS antenna ports corresponding to the K=4 CSI-RS resources for channel measurement configured by the base station 110 is P=128, and the base station 110 indicates to the user equipment 120 through the first indication information (RRC/DCI/MACCE signaling) which antenna ports corresponding to the CSI-RS resources have been selected. Based on the indication of the first indication information of the base station 110, the user equipment 120 can determine that the number of antenna ports to be further selected is P _csi-rs , P _csi-rs =48 or 64; the user equipment 120 selects the CSI-RS antenna port based on P The codebook parameter combination in _{the csi-rs} and the second indication information sent by the base station 110 determines the CSI that the user equipment 120 needs to feedback, where P represents the total number of CSI-RS antenna ports across multiple CSI-RS resources, and K represents the number of CSI-RS resources corresponding to the P antenna ports.

The base station 110 indicates to the user equipment 120 which CSI-RS antenna ports have been selected. The specific indication method may be at least one of the following methods:

Method 1: Using a bitmap, the number of bits contained in the bitmap is P, and each bit corresponds to an antenna port. A bit of 0 may indicate that the antenna port is selected, and a bit of 1 may indicate that the antenna port is not selected; or a bit of 0 may indicate that the antenna port is not selected, and a bit of 1 may indicate that the antenna port is selected.

Method 2: Use a bitmap, but the bitmap indicates which antenna ports are selected from the number of antenna ports corresponding to each CSI-RS resource. Multiple CSI-RS resources can share a set of bitmap indications. The number of bits contained in the bitmap is P/K, where K is the number of CSI-RS resources configured for channel measurement. This can greatly reduce indication overhead.

Method 3: Use the bitmap method, and different polarization directions share the bitmap indication. The number of bits contained in the bitmap is P/2. Each bit corresponds to two antenna ports in different polarization directions. The bit position can be 0 to indicate that the antenna port is selected, and the bit position can be 1 to indicate that the antenna port is not selected; or the bit position can be 0 to indicate that the antenna port is not selected, and the bit position can be 1 to indicate that the antenna port is selected.

Method 4: Using a bitmap method, and sharing a bitmap indication for different CSI-RS resources and different polarization directions. This can be a bitmap indication shared by different polarization directions corresponding to all CSI-RS resources, or a bitmap indication shared by different polarization directions corresponding to each CSI-RS resource. The number of bits contained in the bitmap is P/2K, and each bit corresponds to two antenna ports with different polarization directions. A bit of 0 can indicate that the antenna port is selected, and a bit of 1 can indicate that the antenna port is not selected. Alternatively, a bit of 0 can indicate that the antenna port is not selected, and a bit of 1 can indicate that the antenna port is selected.

Method 5: Indicate by the combination number, that is, select P _csi-rs antenna ports from P antenna ports. The mathematical formula can be expressed as The required bit indication overhead is

Method 6: Indicated by the combination number, and the antenna ports corresponding to multiple CSI-RS resources share a set of combination number selection methods, that is, P _csi-rs /K antenna ports are selected from P/K antenna ports. The mathematical formula can be expressed as The required bit indication overhead is

Method 7: Use the combination number method, and different polarization directions share the same selection instruction, that is, select P _csi-rs /2 antenna ports from P/2 antenna ports. The mathematical formula can be expressed as The required bit indication overhead is

Method 8: Indicated by the combination number, and different CSI-RS resources and different polarization directions share the same selection indication, that is, P _csi-rs /2K antenna ports in P/2K antenna ports, the mathematical formula can be expressed as The required bit indication overhead is

Method 2:

In some embodiments, when the first indication information indicates the number of antenna ports selected for a number of CSI-RS resources, the predefined constraints include constraining the antenna ports so that the number of antenna ports corresponding to different polarization directions for all CSI-RS resources is the same, thereby reducing indication overhead for base station 110 and reporting overhead for user equipment 120. In some embodiments, the number of antenna ports corresponding to different polarization directions for all CSI-RS resources may also be constrained. In this way, the first indication information indicated by base station 110 and the predefined constraints can indicate the number and positions of antenna ports selected by user equipment 120 and base station 110.

Specifically, the base station 110 indicates the number of CSI-RS antenna ports selected by the base station 110 through the first indication information, that is, the downlink signaling, and then the base station 110 and the user equipment 120 determine which antenna ports are selected through a predefined constraint method. The user equipment 120 determines which antenna ports are selected based on the indication of the first indication information of the base station 110 and the predefined constraints. The antenna port corresponding to the CSI-RS resource is further selected from the ports to be selected. The user equipment 120 may also not select the antenna port corresponding to the CSI-RS resource. For example, the total number of CSI-RS antenna ports corresponding to the K=4 CSI-RS resources for channel measurement configured by the base station 110 is P=128. The base station 110 indicates to the user equipment 120 through RRC/DCI/MACCE signaling that the number of antenna ports corresponding to the CSI-RS resources selected by the base station 110 is P _csi-rs , where P _csi-rs =48 or 64. The user equipment 120 determines the CSI that the user equipment 120 needs to feedback based on P _csi-rs indicated by the first indication information of the base station 110 and the codebook parameter or codebook parameter combination indicated by the second indication information, as well as the predefined constraints. The above P represents the total number of CSI-RS antenna ports corresponding to the multiple CSI-RS resources, and K represents the number of CSI-RS resources corresponding to the P antenna ports.

The predefined constraint method can be at least one of the following:

Method 1: Based on the number P _csi-rs of antenna ports corresponding to the selected CSI-RS resources indicated by the first indication information sent by the base station 110, the P _csi-rs antenna ports with smaller or larger antenna port numbers can be constrained to be the selected antenna ports. The antenna port numbers are smaller or larger, and the smaller P _{csi -rs} antenna ports can be selected incrementally starting from the smallest antenna port number until P _csi-rs are selected. Similarly, the larger P _csi-rs antenna ports can be selected incrementally starting from the largest antenna port number until P _csi-rs are selected.

Method 2: Based on the number of selected CSI-RS antenna ports P _csi-rs indicated by the first indication information sent by the base station 110, the number of antenna ports selected for different polarization directions can be constrained to be the same as P _csi-rs /2, and they can all correspond to P _csi-rs /2 with smaller/larger antenna port numbers in different polarization directions. The P _csi-rs /2 with smaller or larger antenna port numbers can refer to Method 1 and will not be repeated here.

Method 3: Based on the number of selected CSI-RS antenna ports P _csi-rs indicated by the base station 110, the standard can constrain the number of antenna ports selected for different CSI-RS resources to be the same, P _csi-rs /K, and they can all correspond to P _csi-rs /K with smaller/larger antenna port numbers corresponding to different CSI-RS resources. P _csi-rs /2 with smaller or larger antenna port numbers can refer to Method 1 and will not be repeated here.

Method 4: Based on the number of CSI-RS antenna ports P _csi-rs selected indicated by the base station 110, the standard can constrain the number of antenna ports corresponding to different CSI-RS resources and different polarization directions to be the same as P _{csi-rs /} 2K, and they can all correspond to different CSI-RS resources or different polarization directions. The P _csi-rs /2K with smaller/larger antenna port numbers can refer to Method 1 and will not be repeated here.

In some embodiments, the first indication information is indicated by at least one of the following methods: radio resource control (RRC), downlink control information (DCI), and media access control sublayer control element (MACCE). That is, the first indication information may be indicated by radio resource control (RRC), downlink control information (DCI), media access control sublayer control element (MACCE), a combination of RRC+MACCE, or a combination of RRC+DCI.

Specifically, the first indication information may further include at least one of the following:

Method 1: The base station 110 indicates to the user equipment 120 which antenna ports are selected or the number of selected antenna ports P _csi-rs through RRC signaling. For example, a new IE 'CodebookConfig-r19' is added to the RRC configuration and a new codebook type 'typeII-PortSelection-r19' is added to its following configuration. The newly added antenna port selection indication information 'AntennaPortSeletion' is configured under the codebook type to indicate which antenna ports are selected by the user equipment 120 through the bitmap or combination number shown above; or the number of selected antenna ports 'NumberOfAntenna' is configured under the 'typeII-PortSelection-r19' codebook type. In combination with the above possible predefined constraints, the user equipment 120 can determine the antenna port that the base station 110 has selected. Or configure the index information of the selected number of antenna ports under the codebook type, for example, 1 bit is used to indicate whether it is 48 antenna ports or 64 antenna ports, for example: 0 represents 48 antenna ports, 1 represents 64 antenna ports; Note that the above-mentioned RRC configuration method can be applicable to CSI periodic reporting, semi-continuous reporting or non-periodic reporting.

Method 2: The base station 110 indicates to the user equipment 120 via MACCE or DCI which antenna ports are selected or the number of selected antenna ports P _csi-rs . For example, the base station 110 indicates in the MACCE or DCI signaling of activating the CSI reporting configuration: New antenna port selection indication information, 'AntennaPortSeletion', is added to indicate which antenna ports the user equipment 120 has selected, using the bitmap or combination number method shown above. Alternatively, the number of antenna ports, 'NumberOfAntenna', is added to the MAC CE or DCI signaling that activates the CSI reporting configuration. Combined with the possible predefined constraints described above, the user equipment 120 can determine the antenna ports selected by the base station 110. Note that the configuration method described above using MAC CE or DCI can be applicable to both semi-continuous and aperiodic CSI reporting. Furthermore, for the method of indicating via MAC CE or DCI, the selected antenna ports may differ at different times, or the number of antenna ports may also differ at different times. For example, the number of antenna ports indicated by the base station 110 via MAC CE or DCI at time t1 is 48, and the number of antenna ports indicated at time t2 is 64.

Method 3: Base station 110 uses RRC signaling to indicate to user equipment 120 the maximum number of antenna ports selected or the maximum number of antenna ports to be selected, P _max . For example, a new IE 'CodebookConfig-r19' is added to the RRC configuration, and a new codebook type 'typeII-PortSelection-r19' is added to its configuration. Antenna port selection indication information 'AntennaPortSeletion' is configured under this codebook type. The maximum number of antenna ports selected is indicated to user equipment 120 using the bitmap or combination number method shown above. Alternatively, information 'NumberOfAntenna' is configured under the 'typeII-PortSelection-r19' codebook type. Combined with the possible predefined constraints described above, user equipment 120 can determine the antenna ports that base station 110 may select. Furthermore, base station 110 determines the antenna ports or number of antenna ports actually indicated to user equipment 120 based on changes in channel information at different times. For example, base station 110 can dynamically configure a certain number of antenna ports for user equipment 120 based on temporal channel changes through MAC CE or DCI. Then, based on the antenna port selection indication information 'AntennaPortSeletion', the antenna ports to be dynamically indicated are determined. The specific determination method may be to intercept some antenna ports according to a certain rule in the 'AntennaPortSeletion' configured by RRC. Specifically, the rule may be to intercept the first part of the bitmap or the second part of the bitmap information until the number of intercepted antenna ports equals the number of antenna ports dynamically configured by the MAC CE or DCI. The selected antenna ports may satisfy the requirement that the number of antenna ports corresponding to different polarization directions is the same, or the number of antenna ports corresponding to different CSI-RS resources is the same, or the number of antenna ports corresponding to different polarization directions of different CSI-RS resources is the same. For another example, the base station 110 may dynamically configure a certain number of antenna ports for the user equipment 120 based on the change of the channel over time through the MAC CE or DCI, and the specific corresponding antenna ports are determined based on the predetermined constraint method mentioned above.

Method 4: The base station 110 indicates the number of candidate antenna ports to the user equipment 120 through RRC, for example, P _csi-rs can be equal to 48 or equal to 64, and then indicates to the user equipment 120 through DCI or MAC CE instructions that the number of antenna ports P _csi-rs is 48 or 64; then, based on a predefined constraint method, it is determined which antenna ports in the CSI-RS resources the 48 or 64 antenna ports correspond to; the specific predefined constraint method can be determined by any one of methods 1 to 4 described above.

Method 5: Determine the antenna port selected by the base station 110 through a predefined constraint method. For example, the typeII-PortSelection-r19 codebook enhanced based on the Rel-17 FeType-II port selection codebook can be constrained. When the number of CSI antenna ports of the CSI-RS resources configured for channel measurement is 48 or 64, the user equipment 120 calculates PMI, CQI, RI and other information based on the number of antenna ports corresponding to the CSI-RS resources configured by the base station 110; or when the number of CSI antenna ports of the CSI-RS resources configured for channel measurement is 64, the user equipment 120 calculates PMI, CQI, RI and other information based on the number of antenna ports corresponding to the CSI-RS resources configured by the base station 110. The user equipment 120 defaults to the number of antenna ports selected by the base station 110 being 48 or 64, and the specific 48 ports can also be determined based on predefined constraints, for example, any one of the methods 1 to 4 described above can be used to determine it. If it is 64, no additional constraints and indications are required; or when the number of CSI antenna ports of the configured CSI-RS resources for channel measurement is 128, the user equipment 120 side defaults to the number of antenna ports selected by the base station 110 being 48 or 64, and the specific 48 or 64 ports can also be determined based on predefined constraints, for example, any one of the methods 1 to 4 described above can be used to determine it.

Optionally, the configuration information of the above MAC CE or DCI can be carried in the MAC CE signaling or DCI signaling that triggers CSI reporting. For example, for semi-persistent reporting, the configuration information of the MAC CE is carried in the MAC CE signaling that triggers semi-persistent CSI reporting; and for aperiodic reporting, the configuration information of the DCI is carried in the DCI signaling that triggers aperiodic CSI reporting. In addition, the above MAC CE or DCI configuration information may not be carried in the MAC CE or DCI signaling that triggers CSI reporting, and the base station 110 indicates it to the user equipment 120 through a new independent MAC CE or DCI signaling.

Example 2

This embodiment mainly solves the problem of codebook parameter configuration. First, the enhanced codebook (FetypeII-PortSelection-r19) based on the Rel-17 port selection codebook supports more than 32 antenna ports and less than 128 antenna ports across multiple CSI-RS resources. Considering that the base station 110 can add precoding to the CSI-RS information sent for channel measurement based on the partial reciprocity between the uplink and downlink channels, and the base station 110 can identify some angle delay pairs with good channel quality in advance, the FetypeII-PortSelection-r19 codebook has reached a consensus and supports the number of antenna ports P CSI _-RS as {48, 64}. However, considering the increase in processing complexity of the user equipment 120 and the increase in reporting overhead of the user equipment 120, in order to better reduce the processing complexity of the user equipment 120 and reduce the feedback overhead of the user equipment 120, at least one of the following methods can be used:

Method 1

In some embodiments, when the total number of antenna ports is a first value, the second indication information indicates a codebook parameter or codebook parameter combination supporting a number M of frequency domain bases of 1. Optionally, the first value may be any value in the set {48, 64}, or may be 48 or 64. In this way, the user equipment 120 does not need to report the frequency domain base selection indication information, thereby reducing the feedback overhead of the user equipment 120 and the computational complexity of the user equipment 120.

Specifically, the possible configurations of codebook parameters under different antenna ports are constrained. For the Rel-17 port selection codebook, the number of frequency domain bases supported for selection is M = 1 or 2. That is, each antenna port can load two angle delay pairs. Considering that the Rel-17 port selection codebook supports a maximum of 32 CSI-RS antenna ports, and the FetypeII-PortSelection-r19 codebook can support 48 or 64 antenna ports, this means that the FetypeII-PortSelection-r19 codebook can provide more antenna ports for loading angle delay pair information. Therefore, only one angle delay pair can be loaded on each antenna port. Therefore, for the FetypeII-PortSelection-r19 codebook, in order to reduce the feedback overhead of the user equipment 120, when the antenna port _PCSI-RS is {48,64}, only codebook parameter combinations with M = 1 can be considered; or when the antenna port _PCSI-RS is 64, only codebook parameter combinations with M = 1 can be considered.

Method 2

In some embodiments, when the total number of antenna ports is a second value, the second indication information indicates support for a codebook parameter or codebook parameter combination with a port selection coefficient of 1. Optionally, the second value is any value in the set {48, 64}, or may be 48 or 64. In this way, the user equipment 120 does not need to report the antenna port selection indication information, thereby helping to reduce the feedback overhead of the user equipment 120 and the computational complexity of the user equipment 120.

Specifically, considering that the base station 110 can select the antenna port in advance, for the FetypeII-PortSelection-r19 codebook, in order to reduce the overhead indicated by the user equipment 120, when the number of antenna ports is {48, 64}, only codebook parameters or codebook parameter combination configurations that only support the port selection coefficient α=1 in the codebook parameter configuration may be considered. Alternatively, when the number of antenna ports is 48, only codebook parameters or codebook parameter combinations that only support the port selection coefficient α=1 in the codebook parameter configuration may be considered.

Method 3

In some embodiments, when the total number of antenna ports is a third value, the second indication information indicates a codebook parameter or codebook parameter combination supporting a number M of frequency domain bases of 1 and a port selection coefficient of 1. Optionally, the third value is any value in the set {48, 64}, and may also be 48 or 64. In this way, the user equipment 120 does not need to report the antenna port selection indication information, thereby helping to reduce the feedback overhead of the user equipment 120 and the computational complexity of the user equipment 120.

Specifically, considering that the base station 110 can select antenna ports in advance and the number of selected antenna ports is already large enough, it is sufficient to load one angle delay pair for each antenna port. Therefore, for the FetypeII-PortSelection-r19 codebook, in order to reduce the overhead indicated by the user equipment 120, when the number of antenna ports is {48, 64}, only codebook parameters or codebook parameter combination configurations that only support the port selection coefficient α=1 and the number of frequency domain bases M=1 can be considered. Alternatively, when the number of antenna ports is 48/64, only codebook parameters or codebook parameter combination configurations that support the port selection coefficient α=1 and M=1 can be considered.

Method 4

In some embodiments, when M is 2, the second indication information indicates support for a non-zero coefficient selection factor that is smaller than a conventional non-zero coefficient selection factor. In some embodiments, when M is 2 and the total number of antenna ports is a fourth value, the second indication information indicates support for codebook parameters or codebook parameter combinations with port selection coefficients other than 1. Optionally, the fourth value is any value in the set {48, 64}, and may also be 48 or 64. This eliminates the need for user equipment 120 to report antenna port selection indication information, thereby helping to reduce feedback overhead and computational complexity of user equipment 120.

Specifically, considering that the base station 110 can select the antenna port in advance and the number of selected antenna ports is large enough, if each antenna port is loaded with two angle delay pairs, that is, M=2, and the user equipment 120 does not make further selection of the antenna port, it will inevitably lead to a further increase in non-zero coefficients. Therefore, in order to limit the overhead reported by the user equipment 120, on the one hand, a smaller non-zero coefficient selection factor β can be introduced, for example, β can be 1/4 or 3/8; on the other hand, it can be constrained that when the number of antenna ports is {48,64}, it can be considered that the codebook parameter combination that satisfies M=2 and α=1 at the same time is not supported. That is, when M is 2 and the total number of antenna ports is the fourth value, the second indication information indicates that the port selection coefficient α is non-1 and the codebook parameter or codebook parameter combination is supported.

Method 5

In some embodiments, considering that the base station 110 can select the antenna ports in advance and the number of selected antenna ports is large enough, the user equipment 120 does not need to make too many selections of antenna ports. Therefore, it is considered here that the codebook parameter or codebook parameter combination configuration of α=1/2 in Table 5.2.2.2.7-1 in the existing standard 38.214 is not supported.

It should be noted that the above methods 1 to 5 are applicable to the following two scenarios. In the first scenario, the total number of antenna ports corresponding to the multiple CSI-RS resources configured by the base station 110 is 64 or 128. In this scenario, the antenna ports mentioned in methods 1 to 5 refer to the antenna ports that the base station 110 selects and informs the user equipment 120. If the total number of antenna ports corresponding to the multiple CSI-RS resources configured by the base station 110 is 64, and the base station 110 does not make a selection, the base station 110 does not need to indicate the number of antenna ports selected by the UE; the other scenario is that the total number of antenna ports corresponding to the multiple CSI-RS resources configured by the base station 110 is P=48 or 64. In this scenario, the antenna port _PCSI- RS mentioned in the above methods 1 to 5 can be understood as the total number of antenna ports corresponding to the multiple CSI-RS resources, that is, P= _PCSI-RS , and the base station 110 does not need to select and indicate the UE.

Example 3

This embodiment primarily addresses the issue of CPU usage in CSI processing when using a codebook method that combines a Rel-17 port selection codebook with multiple CSI-RS resources to support a maximum of 128 antenna ports. Since the Rel-17 port selection codebook primarily utilizes the reciprocity of angle delays in uplink and downlink channels, when the Rel-17 port selection codebook combines multiple CSI-RS resources to support a maximum of 128 antenna ports, the base station 110 adds precoding information to the downlink CSI-RS signal based on angle delay pair information obtained from uplink channel estimation when transmitting the downlink CSI-RS reference signal. This allows the base station 110 to obtain some angle delay pair information in advance relative to the user equipment 120. When a large number of antenna ports are supported, the quality of the channels corresponding to some angle delay pair information may be relatively poor. Therefore, when adding precoding to the downlink CSI-RS reference signal, the base station 110 can select some angle delay pairs or CSI-RS antenna ports in advance. This helps reduce the processing complexity of the user equipment 120, thereby impacting the existing calculation method that reduces CPU usage in CSI processing. In this regard, this embodiment provides a method for determining the number of CPUs that may be occupied when selecting a codebook for a Rel-17 port in conjunction with multiple CSI-RS resources to support codebook parameters for a maximum of 128 antenna ports.

In some embodiments, the number of CSI processing unit CPUs occupied by the calculation process of the multiple CSIs corresponding to the multiple CSI-RS resources is determined based on the following method: the number of CPUs occupied is determined based on the coefficient X and the N, and the coefficient X is taken from the first set, wherein the N represents the number of CSI-RS resources configured for channel measurement. Optionally, the first set can be {0.375, 0.5, 0.75, 1}, or {0.375, 0.5, 0.75, 1}, or {1/4, 9/64, 9/16, 3/8, 1/2, 3/4, 1}. Through the above method, for the user equipment 120 based on the Rel-17 port selection codebook combined with multiple CSI-RS resources can support a codebook with a maximum of 128 antenna ports, effectively counting terminal calculations and content resource usage, thereby better controlling terminal resource usage and ensuring that effective features do not exceed terminal capability constraints.

Specifically, the method in which the user equipment 120 occupies the number of CPUs may be at least one of the following:

Method 1: Referring to the CPU calculation rules of the Rel-17 FeType II codebook, the number of CPUs corresponding to codebook measurement and CSI reporting for a single CSI-RS resource with a maximum of 32 antenna ports is 1. For a codebook method based on the Rel-17 FeType II codebook combined with multiple CSI-RS resources to support a maximum of 128 antenna ports, it is clear that the calculation complexity of the user equipment 120 is related to the number of configured CSI-RS resources. Therefore, the number of CPUs occupied by the user equipment 120 for CSI processing can be expressed as O _cpu =N, where 1≤N≤4 represents the number of CSI-RS resources configured for channel measurement.

Method 2: Refer to the CPU calculation rules of Rel-17 FeTypeII codebook. The number of CPUs corresponding to codebook measurement and CSI reporting for a single CSI-RS resource with a maximum of 32 antenna ports is 1. When the FeTypeII codebook is combined with multiple CSI-RS resources to support a codebook method with a maximum of 128 antenna ports, the number of CSI-RS antenna ports that may be supported by the multiple CSI-RSs configured by the user equipment 120 for channel measurement is {48, 64, 128}, and for 48 CSI-RS antenna ports, the user equipment 120 may configure 3 CSI-RS resources with 16 antenna ports, and for 64 CSI-RS antenna ports, the user equipment 120 may configure 2 CSI-RS resources with 32 antenna ports. Obviously, if the CPU occupancy is calculated based on the number of configured CSI-RS resources, it cannot well reflect the complexity of the processing of the user equipment 120. To this end, this embodiment comprehensively considers the CPU problem occupied by CSI processing through two factors: the number of CSI-RS resources and the number of antenna ports corresponding to all CSI-RS resources. Therefore, the number of CPUs occupied by the user equipment 120 for processing CSI can be expressed as O _cpu =XN, where 1≤N≤4 represents the number of CSI-RS resources configured for channel measurement. The value of X can be {0.375, 0.5, 0.75, 1}, and X∈{0.375, 0.5, 0.75, 1} can be reported based on the capabilities of the user equipment 120. For example, for 48 antenna ports, if the base station 110 configures two CSI-RS resources with 24 antenna ports for the user equipment 120, or if the base station 110 configures three CSI-RS resources with 16 antenna ports for the user equipment 120, according to the above rules, when N=2, the value of X can be 0.75, and when N=3, the value of X can be 0.5. According to the above rules, when the number of CSI-RS antenna ports is 48, regardless of whether two or three CSI-RS resources are configured for channel measurement, the CPU occupied by the user equipment 120 for processing CSI reports is the same.

Method 3: Referring to the CPU calculation rules of the Rel-17 FeTypeII codebook, when performing codebook measurement and CSI reporting for the maximum 32 antenna ports corresponding to a single CSI-RS resource, the corresponding number of CPUs is 1. For a codebook method based on the Rel-17 FeTypeII codebook combined with multiple CSI-RS resources to support a maximum of 128 antenna ports, the total number of CSI-RS antenna ports that may be supported by multiple CSI-RS resources configured by the user equipment 120 for channel measurement is {48, 64, 128}. Considering that the base station 110 can identify some angle delay pair information with better channel quality in advance based on the partial reciprocity of the uplink and downlink channels, that is, the reciprocity of the angle delays of the uplink and downlink channels, thereby using these angle delay pair information with better quality to precode the downlink CSI-RS signal, according to the prior art, when the user equipment 120 performs antenna port selection, the number of antenna ports that can be selected or the number of antenna ports selected by the base station 110 is P _csi-rs , where the value of P _csi-rs is P _csi-rs ={48,64}. When the total number of antenna ports P of CSI-RS resources configured by base station 110 for user equipment 120 for channel measurement is greater than P _csi-rs , base station 110 assumes some of the antenna port selection tasks. As a result, the processing complexity of user equipment 120 is reduced, which affects the number of CPUs occupied by user equipment 120 for CSI reporting. Based on this, this method is combined with the above-mentioned method 1 to provide the number of CPUs occupied by user equipment 120 for CSI processing, which can be expressed as O _cpu =XN, where the value of X can be {0.375, 0.5, 0.75, 1}, and X∈{0.375, 0.5, 0.75, 1} can be reported based on the capabilities of user equipment 120. Obviously, when the total number of antenna ports of the CSI-RS resources configured by the base station 110 for the user equipment 120 is P= _PCSI-rs , the value of X is 1; when P> _PCSI-rs , the value of X is less than 1. The specific value is related to the value of _PCSI-rs . For example, when N=2, P=64. If _PCSI-rs =48, the value of X is 0.75.

Method 4: Referring to the CPU calculation rules of the Rel-17 FeTypeII codebook, the number of CPUs corresponding to codebook measurement and CSI reporting for a single CSI-RS resource with a maximum of 32 antenna ports is 1. For a codebook method based on the Rel-17 FeTypeII codebook combined with multiple CSI-RS resources to support a maximum of 128 antenna ports, the total number of CSI-RS antenna ports that may be supported by multiple CSI-RSs configured by the user equipment 120 for channel measurement is {48, 64, 128}. Considering that the base station 110 can identify some angle delay pair information with better channel quality in advance based on the partial reciprocity of the uplink and downlink channels, that is, the reciprocity of the angle delays of the uplink and downlink channels, thereby using these angle delay pair information with better quality to precode the downlink CSI-RS signal, according to the progress of existing standard discussions, when the user equipment 120 selects the antenna port, the number of antenna ports that can be selected or the number of antenna ports selected by the base station 110 is P _csi-rs , where the value of P _csi-rs is P _csi-rs. ={48,64}. Obviously, when the total number of antenna ports P of CSI-RS resources configured by base station 110 for user equipment 120 for channel measurement is greater than P _csi-rs , base station 110 assumes some of the antenna port selection tasks, thereby reducing the processing complexity of user equipment 120. This has an impact on the number of CPUs occupied by user equipment 120 for CSI reporting. Furthermore, considering that different numbers of antenna ports may have multiple resource configuration methods, for example, for 48 antenna ports, if base station 110 configures user equipment 120 with two CSI-RS resources with 24 antenna ports, or if base station 110 configures user equipment 120 with three CSI-RS resources with 16 antenna ports, in order to ensure that the number of CPUs occupied by user equipment 120 is the same when the number of antenna ports is the same, the impact of the number of antenna ports on CPU usage needs to be considered. Based on the above two factors, the number of CPUs occupied by the user equipment 120 for processing CSI can be expressed as O _cpu =XN, where 1≤N≤4 represents the number of CSI-RS resources configured for channel measurement, and the value of X can be {1/4, 9/64, 9/16, 3/8, 1/2, 3/4, 1}, and X∈{1/4, 9/64, 9/16, 3/8, 1/2, 3/4, 1} can be reported through the capabilities of the user equipment 120.

The reason why X has the above values is mainly because, based on the maximum number of antenna ports for a single CSI-RS resource of 32, when the total number of antenna ports for CSI-RS resources configured by the base station 110 for the user equipment 120 is P=P _csi-rs , and the number of antenna ports corresponding to each CSI-RS resource is 32, the value of X is 1; when the total number of antenna ports for CSI-RS resources configured by the base station 110 for the user equipment 120 is P=P _csi-rs , if the number of antenna ports corresponding to the configured CSI-RS resources is less than 32, the value of X is less than 1, and the specific value is the ratio of the number of antenna ports corresponding to each CSI-RS resource to the maximum number of antenna ports for a single CSI-RS resource, which can be {3/8, 1/2, 3/4}; and when the number of antenna ports corresponding to each CSI-RS resource is 32, when P>P _csi-rs , according to method three, the value of X can be {3/8, 1/2, 3/4}; and when the number of antenna ports corresponding to each CSI-RS resource is less than 32, and P>P When using _CSI-RS , the value of X can be {1/4, 9/64, 9/16}.

For Type II codebook enhancements, which support up to 128 antenna ports, the existing technology for Type II codebook enhancements considers the Rel-18 Type-II Doppler codebook. The enhanced aperiodic CSI-RS resources for this codebook require consideration. To address the aforementioned issues, the present disclosure employs the following approach.

FIG4 illustrates one of the flow charts of the method for measuring and reporting channel state information (CSI) provided by the present disclosure. As shown in FIG4 , the method can be applied to user equipment 120. The method includes:

Step A100: Receive channel state information reference signal (CSI-RS) resource configuration information for channel measurement and/or interference measurement, wherein the CSI-RS resource configuration information includes at least one CSI-RS resource set, the at least one CSI-RS resource set includes multiple CSI-RS resource groups, and the total number of antenna ports corresponding to each CSI-RS resource group is greater than a predefined threshold; two consecutive CSI-RS resources are located in the same or adjacent time slots; all CSI-RS resources are triggered based on the same trigger instance; and the predefined threshold is 32;

Step A200: Calculate and report channel state information CSI based on the codebook parameter information or codebook parameter combination information and the CSI-RS resource configuration information.

FIG5 illustrates one of the flow charts of the method for measuring and reporting channel state information (CSI) provided in the present disclosure. As shown in FIG5 , the method can be applied to a base station 110. The method includes:

Step B100: Send channel state information reference signal CSI-RS resource configuration information for channel measurement and/or interference measurement, wherein the CSI-RS resource configuration information includes at least one CSI-RS resource set, the at least one CSI-RS resource set includes several CSI-RS resource groups, and the total number of antenna ports corresponding to each CSI-RS resource group is greater than Predefined threshold; two consecutive CSI-RS resources are located in the same or adjacent time slots; all CSI-RS resources are triggered based on the same trigger instance; the predefined threshold is 32;

Step B200: Receive channel state information CSI fed back by the terminal, recover precoding information according to the received CSI, and send data or control information based on the precoding information.

Specifically, the user equipment 120 receives the channel state information reference signal CSI-RS resource configuration information for channel measurement and/or interference measurement sent by the base station 110. Since the CSI-RS resource configuration information includes at least one CSI-RS resource set, the at least one CSI-RS resource set includes several CSI-RS resource groups, and the total number of antenna ports corresponding to each CSI-RS resource group is greater than a predefined threshold, each CSI-RS resource group in the CSI-RS resource configuration information can support a larger antenna port. The user equipment 120 calculates and reports the channel state information CSI based on the codebook parameter information or the codebook parameter combination information and the CSI-RS resource configuration information, which to a certain extent reduces the signaling configuration, and enables the base station 110 to provide better coverage and higher data transmission rate, thereby improving the reliability and stability of the network and reducing data transmission delay and packet loss rate.

It is worth noting that the channel state information CSI is calculated and reported based on the codebook parameter information or the codebook parameter combination information and the CSI-RS resource configuration information using existing technologies, which will not be described in detail here.

The fourth embodiment is some specific implementations of Figures 4 and 5.

Example 4

In some embodiments, the CSI-RS resources are used for channel measurement, and the CSI-RS resource configuration information includes a CSI-RS resource set, wherein the multiple CSI-RS resources in the CSI-RS resource set are divided into a plurality of CSI-RS resource groups, and the number of antenna ports corresponding to each CSI-RS resource in each CSI-RS resource group is the same; based on the grouping of CSI-RS resources and the constraint on the number of antenna ports corresponding to each CSI-RS resource in each CSI-RS resource group, signaling overhead can be saved.

The Rel-18 Type-II Doppler codebook is enhanced to support channel measurement and codebook design for more than 32 antenna ports across multiple Non-Zero Power CSI-RS (NZP CSI-RS) resources used for channel measurement. The specific CSI-RS resource configuration for channel measurement can be in at least one of the following ways:

Method 1: Configure X CSI-RS resource sets, where X may be at least one of {2, 3, 4}. The number of aperiodic CSI-RS resources that can be configured for channel measurement in each resource set is at least one of {4, 8, 12}. The multiple CSI-RS resource sets contain the same number of aperiodic CSI-RS resources for channel measurement, and the number of antenna ports for the aperiodic CSI-RS resources for channel measurement in each set is the same. The number of antenna ports corresponding to the multiple aperiodic CSI-RS resources for channel measurement in different CSI-RS resource sets is the same/different. From each CSI-RS resource set, one aperiodic CSI-RS resource for channel measurement is selected to form a CSI-RS resource group. The sum of the number of CSI-RS antenna ports in each CSI-RS resource group is greater than 32 and less than 128. The multiple CSI-RS resources in the same CSI-RS resource group are located in two or more identical or adjacent slots, for example, three or four. In addition, in the same CSI-RS resource set, two consecutive CSI-RS resources among multiple CSI-RS resources used for channel measurement are located in the same or adjacent slots. The term "continuous" here can refer to the continuity of CSI-RS resources in the time domain or the continuity of CSI-RS resource numbers. It should be noted that multiple CSI-RS resource sets and multiple non-periodic CSI-RS resources in the resource set are triggered based on the same trigger instance. In addition, the antenna port index corresponding to the total antenna port of multiple CSI-RS resources in the same resource group is the same.

Method 2: Configure X CSI-RS resource sets, where X may take at least one of {4, 8, 12}. The number of non-periodic CSI-RS resources that can be configured for channel measurement in each resource set is at least one of {2, 3, 4}. The number of non-periodic CSI-RS resources for channel measurement contained in multiple CSI-RS resource sets is the same, and the number of antenna ports contained in multiple non-periodic CSI-RS resources in the same resource set is also the same. The total number of antenna ports for non-periodic CSI-RS resources for channel measurement in multiple sets is the same, and the total number of antenna ports for CSI-RS resources for channel measurement in each resource set is greater than 32 and less than 128. Furthermore, multiple non-periodic CSI-RS resources in the same CSI-RS resource set are located in the same or adjacent two or more time slots, such as 3 or 4. In addition, consecutive CSI-RS resources in different CSI-RS resource sets are located in the same or adjacent slots. The consecutiveness here may refer to the CSI-RS resources being in the same time slot. Domain continuity can also refer to CSI-RS resources with the same number in different resource sets. It is important to note that multiple CSI-RS resource sets, and multiple CSI-RS resources within a resource set, are triggered by the same trigger signal. Furthermore, the antenna port index corresponding to the total antenna ports of multiple CSI-RS resources within the same resource set is the same.

Method 3: One CSI-RS resource set is configured. The number of aperiodic CSI-RS resources that can be configured in the resource set for channel measurement can be at least one of {8, 12, 16, 24, 32, 36, 48}. Multiple CSI-RS resources can be divided into 4/8/12 CSI-RS resource groups. The number of CSI-RS resources contained in the same resource group can be the same, which can be at least one of {2, 3, 4}. The multiple CSI-RS resources in the same resource group correspond to the same number of antenna ports. Consequently, the sum of the number of antenna ports corresponding to all CSI-RS resources in the multiple CSI-RS resource groups is the same, and the sum of the number of antenna ports is greater than 32 and less than 128. Furthermore, the antenna port index corresponding to the total antenna ports of the multiple CSI-RS resources in the multiple CSI-RS resource groups is the same. The multiple CSI-RS resource groups are used to measure the channel between base station 110 and user equipment 120 at different times. Furthermore, the multiple CSI-RS resources in the same CSI-RS resource group are located in two or more identical or adjacent slots, such as three or four. In addition, in different CSI-RS resource groups, two consecutive CSI-RS resources are located in the same or adjacent slots. The continuity here can refer to the continuity of CSI-RS resources in the time domain, or it can refer to CSI-RS resources with the same number in different CSI-RS resource groups. It should be noted here that in the above-mentioned CSI-RS resource set, all CSI-RS resources are triggered based on the same trigger instance. For example, 8 CSI-RS resources are configured in a CSI-RS resource set. These 8 CSI-RS resources can be divided into 4 CSI-RS resource groups, each CSI-RS resource group contains two CSI-RS resources, and the sum of the number of antenna ports of these two CSI-RS resources is greater than 32, and the sum of the number of antenna ports corresponding to the two CSI-RS resources in each CSI-RS resource group is the same.

Method 4: Configure one CSI-RS resource set. The number of non-periodic CSI-RS resources that can be configured in the resource set for channel measurement can be at least one of {8, 12, 16, 24, 32, 36, 48}. Multiple CSI-RS resources can be divided into 2/3/4 CSI-RS resource groups. The number of CSI-RS resources contained in the same resource group is the same, which can be at least one of {4, 8, 12}. The number of antenna ports corresponding to the multiple CSI-RS resources in the same resource group is the same. One CSI-RS resource is taken from each different CSI-RS resource group to form a CSI-RS resource pair. Each resource pair is used to measure the channel between the base station 110 and the user equipment 120 at different times. The total number of antenna ports corresponding to all CSI-RS resources in each resource pair is greater than 32 and less than 128, and the antenna port index corresponding to the total number of antenna ports of the multiple CSI-RS resources in each resource pair is the same. Furthermore, multiple CSI-RS resources in the same CSI-RS resource pair are located in the same or adjacent two or more slots, such as 3 or 4. In addition, in different CSI-RS resource groups, two consecutive CSI-RS resources are located in the same or adjacent slots. The continuity here can refer to the continuity of CSI-RS resources in the time domain, or it can refer to CSI-RS resources with the same number in different CSI-RS resource groups. It should be noted here that in the above-mentioned CSI-RS resource set, all CSI-RS resources are triggered based on the same triggering instance. For example, 8 CSI-RS resources are configured in a CSI-RS resource set. These 8 CSI-RS resources can be divided into 2 CSI-RS resource groups, each CSI-RS resource group contains 4 CSI-RS resources. Therefore, these 8 CSI-RS resources can form 4 CSI-RS resource pairs, and the sum of the total number of antenna ports of each CSI-RS resource pair is greater than 32. These 4 CSI-RS resource pairs are used to measure the channel between the base station 110 and the user equipment 120 at different times.

In some embodiments, the CSI-RS resource is used for interference measurement, the CSI-RS resource configuration information is channel state information interference measurement CSI-IM resource configuration information, the CSI-IM resource configuration information includes at least one CSI-IM resource set, and at least one CSI-IM resource is configured in each CSI-IM resource set for interference measurement.

Specifically, for interference measurement, one CSI-IM resource is configured in the interference measurement resource set csi-IM-ResourceSet for interference measurement; or multiple CSI-RS resources are configured in the interference measurement resource set csi-IM-ResourceSet for interference measurement. For example, 2/3/4 CSI-IM resources are configured for interference measurement, and multiple CSI-IMs use the same pattern, or the pattern is extended based on the existing pattern, so that the interference measurement is more accurate. The diagram of the time-frequency domain resources occupied by the specific extended pattern is shown in ((a), (b), (c), (d), and (e)) of Figure 6.

In addition, the existing technology still has the following problems: (1) For CRI-based codebook enhancement, a maximum of 128 antenna ports are supported. Based on the existing technology, support for Type I single panel codebook is considered, and support for Rel-16 is also possible. Type II codebook. For this standard, some constraints may need to be imposed to reduce the complexity of terminal processing. Specifically, which parameters and configurations need to be resolved? (2) For CRI-based codebook enhancement, it is mainly based on the expansion of Rel-15 single panel. Considering reporting multiple CRIs and their corresponding CSIs, the maximum possible reporting is K _S = 8. It may be necessary to report information through multiple CSIs. The current standard only supports semi-persistent PUCCH reporting for simultaneous multiple CSI reporting, and it is still for resource sets. Therefore, it may also be necessary to consider PUSCH-based reporting based on a single resource set and multiple resource sets? (3) For CRI-based codebook enhancement, a maximum of 128 antenna ports are supported. Based on existing technologies, support for the TypeIsinglepanel codebook is considered, and support for the Rel-16 TypeII codebook may also be considered. The user equipment 120 needs to report multiple CRIs and their corresponding CSIs. Considering that the channel characteristics corresponding to different beams vary greatly, in order to better characterize the CSI of each beam, the base station 110 may need to configure multiple sets of codebook parameters for the user equipment 120, or the Rel-15 TypeI codebook may need to be based on different codebook modes. Therefore, the main consideration here is the configuration of multiple sets of codebook parameters? (4) For Type II codebook enhancement, a maximum of 128 antenna ports are supported. Based on the existing technology for enhancing Type II codebooks, the Rel-16 eType-II codebook is considered. For the enhancement of this codebook, the base station 110 configures multiple CSI-RS resources for the user equipment 120. The current standard has reached an agreement to support 48, 64, and 128 antenna ports. However, different antenna ports may have multiple resource configuration methods. According to the existing CPU occupancy calculation rules, different resource configuration methods occupy different CPUs, and this rule may not be applicable. Secondly, the base station 110 may configure multiple sets of codebook parameter combination configurations for the user equipment 120, requiring the user equipment 120 to select one set from the multiple codebook parameter configurations. The selection process of the user equipment 120 increases the processing complexity of the user equipment 120, and the existing CPU calculation rules may no longer be applicable. Therefore, corresponding modifications are required. In order to solve the above problems, the present disclosure adopts the following method to solve them.

FIG7 illustrates one of the flow charts of the method for measuring and reporting channel state information (CSI) provided by the present disclosure. As shown in FIG7 , the method can be applied to user equipment 120. The method includes:

Step C100: receiving channel state information reference signal (CSI-RS) resource configuration information for channel measurement; wherein the CSI-RS resources corresponding to the CSI-RS resource configuration information are divided into multiple CSI-RS resource groups;

Step C200: Based on the CSI-RS resource configuration information, report at least one channel state information CSI reporting instance, wherein one CSI reporting instance corresponds to one CSI-RS resource group, and the total number of antenna ports corresponding to the several CSI-RS resources is greater than a predefined threshold.

FIG8 illustrates one of the flow charts of the method for measuring and reporting channel state information (CSI) provided in the present disclosure. As shown in FIG8 , the method can be applied to a base station 110. The method includes:

Step D100: Sending channel state information reference signal CSI-RS resource configuration information for channel measurement; wherein the CSI-RS resources corresponding to the CSI-RS resource configuration information are divided into multiple CSI-RS resource groups;

Step D200: Receive at least one channel state information (CSI) reporting instance, wherein one CSI reporting instance corresponds to one CSI-RS resource group, and the total number of antenna ports corresponding to the plurality of CSI-RS resources is greater than a predefined threshold.

Specifically, the user equipment 120 receives the channel state information reference signal CSI-RS resource configuration information for channel measurement sent by the base station 110; the CSI-RS resources corresponding to the CSI-RS resource configuration information are divided into multiple CSI-RS resource groups; the user equipment 120 calculates and reports the corresponding CSI based on the CSI-RS resource configuration information, thereby saving reporting signaling overhead.

Embodiments 5 to 8 are some specific implementations of Figures 7 and 8.

Example 5

In some embodiments, the predefined threshold is 32, and the plurality of CSI-RS resources are used for channel measurement.

In some embodiments, for each CSI reporting instance, at least one of the following information is constrained: the rank indicator (RI), the number of precoding matrix indicator (PMI) subbands, the number of CSI-RS resource indicators (CRI), and the number of spatial bases. In some embodiments, for each CSI reporting instance, at least one of the following information in the CSI-RS resource configuration information is constrained: the number of CSI-RS resources used for channel measurement and the number of antenna ports per CSI-RS resource. This method can reduce reporting overhead and processing complexity for user equipment 120.

Specifically, for CSI reporting enhancement based on CRI extension under the hybrid beamforming architecture, the user equipment 120 may report multiple CRIs and the corresponding CSI, and the CSI may include at least one of RI, PMI, and CQI. If the calculation of the CSI corresponding to each reported CRI is based on the Rel-16 eType II codebook, in order to control the reporting overhead of the user equipment 120 and the complexity of the processing of the user equipment 120, it is necessary to impose some constraints on the capabilities of the user equipment 120. Specifically, at least one of the following methods may be adopted:

Method 1: Constrain the CSI-RS resource indication (CRI) to the value of the rank indication (RI) supported by the CSI, with the RI value being 1≤RI≤4; and in order to reduce the processing complexity and reporting overhead of the user equipment 120, the calculation of the CSI corresponding to the CRI can be constrained to only support R=1, where R represents the number of PMI subbands included in the CQI subband; further, in order to further reduce the processing complexity and reporting overhead of the user equipment 120, it is also possible to constrain the number of codebook spatial bases to a maximum of 2 or 4 when the number of reported CRIs is greater than 1; note that the above-mentioned constraints on RI, the constraints on the number of spatial bases, and the constraints on the R value can be constrained independently, or multiple constraints can be effective simultaneously.

Method 2: The maximum value of the number _Ks of CSI-RS resources configured for channel measurement is constrained to 8, the maximum value of the number M of CRIs reported is 2/4/6/8, and the maximum number of antenna ports for each CSI-RS resource is 16 or 32. Furthermore, to further reduce the processing complexity and reporting overhead of the user equipment 120, the RI value supported by each CRI corresponding to the CSI, the value of R, and the number of codebook spatial bases can also be constrained. For example, the RI value can be constrained to 1≤RI≤4 or 1≤RI≤2, the R value can only support R=1, and the maximum number of codebook spatial bases when the CRI is greater than 1 is constrained to 2 or 4. Note that the above constraints on RI, the constraint on the number of spatial bases, and the constraint on the R value can be constrained independently, or multiple constraints can be effective simultaneously.

Method 3: The maximum value of the number _Ks of CSI-RS resources configured for channel measurement is constrained to be 4, the maximum value of the number M of CRIs reported is 2/4, and the maximum number of antenna ports for each CSI-RS resource is 16 or 32. Furthermore, to further reduce the processing complexity and reporting overhead of the user equipment 120, the RI value supported by each CRI corresponding to the CSI, the value of R, and the number of codebook spatial bases can also be constrained. For example, the RI value can be constrained to be 1≤RI≤4 or 1≤RI≤2, the R value can be constrained to only support R=1, and the maximum number of codebook spatial bases when the CRI is greater than 1 is constrained to be 4. Note that the above constraints on RI, the number of spatial bases, and the R value can be constrained independently, or multiple constraints can be effective simultaneously.

In some embodiments, for each CSI reporting instance, at least one of the following information is constrained: the number of RIs, CRIs, and the spatial beam for calculating the CSI corresponding to each CRI. In some embodiments, for each CSI reporting instance, at least one of the following information is constrained in the CSI-RS resource configuration information: the number of CSI-RS resources used for channel measurement and the number of antenna ports for each CSI-RS resource. This method can reduce the reporting overhead of user equipment 120 and the processing complexity of user equipment 120.

Specifically, for CSI reporting enhancement based on CRI extension under the hybrid beamforming architecture, the user equipment 120 may report multiple CRIs and the corresponding CSI, and the CSI may include at least one of RI, PMI, and CQI. If the calculation of the CSI corresponding to each reported CRI is based on the Rel-15 Type I codebook, in order to control the reporting overhead of the user equipment 120 and the complexity of the processing of the user equipment 120, it is necessary to impose some constraints on the capabilities of the user equipment 120. Specifically, at least one of the following methods may be adopted:

Method 1: When the number of antenna ports in the constrained CSI-RS resources used for channel measurement is less than 16, only 1≤RI≤4 is supported. When the number of antenna ports in the constrained CSI-RS resources used for channel measurement is greater than 16, 1≤RI≤8 is supported.

Method 2: The maximum value of the configured CSI-RS resources _Ks for channel measurement is constrained to 8, the maximum value of the reported CRI number M is 4, and the maximum number of antenna ports for each CSI-RS resource is 16 or 32. At the same time, the maximum RI value of the CSI corresponding to the reported CRI is constrained to be 1≤RI≤4, and the number of spatial domain beams L for calculating the CSI corresponding to each CRI may also be constrained to not exceed L=4.

Method 3: The maximum value of the number of CSI-RS resources _Ks used for channel measurement is constrained to be 4, and the number of reported CRIs _M≤Ks , and the maximum number of antenna ports for each CSI-RS resource is 32; at the same time, the reported CRI is constrained to The maximum RI value of the CSI should be 1≤RI≤4, and the number L of spatial domain beams for calculating the CSI corresponding to each CRI may also be constrained to not exceed L=4.

Example 6

In some embodiments, the CSI-RS resource configuration information is configured in at least one of the following ways: multiple CSI-RS resources are located in the same CSI-RS measurement resource set, and multiple Channel State Information Reference Signal (CSI-RS) resources are located in multiple CSI-RS measurement resource sets. In some embodiments, multiple CSI-RS resources are located in the same CSI-RS measurement resource set, and the multiple CSI-RS resources in the CSI-RS measurement resource set are divided into multiple CSI-RS resource groups. Through the above method, the flexibility of resource configuration of user equipment 120 by base station 110 is increased, and signaling configuration overhead is reduced to a certain extent.

Specifically, for CSI reporting enhancement based on CRI extension, the user equipment 120 may report multiple CRIs and the corresponding CSI, and the CSI may include at least one of RI, PMI, and CQI. For example, the number of CSI-RS resources supported by the user equipment 120 for channel measurement is K _s , where the maximum value of K _s is 8. Therefore, in principle, the user equipment 120 may report the CSI obtained by measuring up to 8 CSI-RS resources. When the user equipment 120 reports multiple CRIs and the corresponding CSIs, considering that the reporting overhead of the user equipment 120 is large, the base station 110 needs to allocate more reporting resources to the user equipment 120. In order to increase the flexibility of the base station 110 in allocating reporting resources to the user equipment 120, and to better distinguish the priority of the reporting content of the user equipment 120, this embodiment mainly considers that when the number of reported CRIs is greater than a certain threshold, it needs to be reported through multiple CSI groups. The CSI group reporting here indicates that the reported CSI group information contains multiple CRIs and the CSI corresponding to the multiple CRIs. For example, when the number of reported CRIs is greater than 4, it is necessary to report through multiple CSI groups, and the number of CRIs reported by the user equipment 120 can be used as a capability feature of the user equipment 120. For example, when the number of CRIs reported by the user equipment 120 is less than or equal to 4, it is a basic feature of the user equipment 120, and when the user equipment 120 reports more than 4 CRIs, it is a capability feature of the user equipment 120. Note that the number of CRIs greater than a certain threshold can also be other values, and 4 is just a specific example. Before designing a specific reporting method, this embodiment first determines a possible resource configuration method, because this resource configuration method may be related to the specific CSI reporting trigger. This embodiment is based on two possible resource configuration methods, which are as follows:

Method 1: All CSI-RS resources used for channel measurement are located in the same CSI-RS measurement resource set, and multiple CSI-RSs in the same CSI-RS measurement resource set can be split into two groups. The specific splitting method can be: if _Ks is an even number, the number of CSI-RS resources in the two groups is the same; if _Ks is an odd number, the first group of CSI-RS resources has one more CSI-RS resource than the second group of CSI-RS resources. Alternatively, when the total number of CSI-RS resources in the resource set is greater than X, the number of CSI-RS resources included in the first resource group is X, and the number of CSI-RS resources in the other CSI-RS resource group is _Ks -X.

Method 2: When the number of CSI-RS resources is less than or equal to X, all CSI-RS resources are located in the same CSI-RS measurement resource set. When the number of CSI-RS resources is greater than X, CSI-RS resources less than or equal to X are located in one CSI-RS measurement resource set, and CSI-RS resources greater than X are located in another CSI-RS measurement resource set.

Method 3: When the number of CSI-RS resources is less than or equal to X, all CSI-RS resources are located in the same CSI-RS measurement resource set. When the number of CSI-RS resources is greater than X, two CSI-RS resource sets are configured, each containing the same number of CSI-RS resources. That is, the CSI-RS resources configured for channel measurement can only be an even number.

Method 4: When the number of CSI-RS resources is less than or equal to X, all CSI-RS resources are located in the same CSI-RS measurement resource set. When the number of CSI-RS resources is greater than X, two CSI-RS resource sets are configured, each containing the same number of CSI-RS resources. If the total number of CSI-RS resources is an odd number, the CSI-RS resource set corresponding to the smaller or larger index is allocated one additional CSI-RS resource. The index is the index of the CSI-RS resource set.

In the above methods, the value of X can be at least one of the following sets: {2, 4, 6}.

In some embodiments, the CSI is reported in a semi-persistent manner, the CSI is carried in a physical uplink control channel (PUCCH), and the method further includes simultaneously activating CSI reporting corresponding to multiple CSI-RS resource groups via a media access control sublayer control element (MACCE). This reporting method can reduce signaling overhead for reporting.

In some embodiments, the CSI is reported semi-continuously or aperiodically, and the CSI is carried in a physical uplink shared channel (PUSCH). The method further includes simultaneously activating multiple CSI-RS resource groups or multiple CSI-RS resource sets via downlink control information (DCI). This reporting method effectively avoids the high overhead of a single CSI report, reduces the probability of conflicts, and reduces the computational complexity of the terminal over a period of time.

Specifically, the CSI reporting is triggered by a CSI reporting trigger message. The reporting method is divided into the following scenarios:

Scenario 1: Semi-persistent CSI reporting, CSI reporting is carried on PUCCH

For semi-persistent CSI reporting, the CSI reporting is carried on the PUCCH reporting method, and the CSI reporting is triggered by MAC CE. For the above-mentioned CSI-RS resource set configuration, if the CSI-RS resource set is configured as method 1, MACCE is required to simultaneously activate the CSI reporting corresponding to multiple CSI-RS resource groups. For example, when the existing MAC CE activates CSI reporting on PUCCH, it is indicated by the S _i field, where S ₀ represents the PUCCH-based semi-persistent CSI reporting configuration with the smallest CSI-ReportConfigId in csi-ReportConfigToAddModList. For the CSI-RS resource group in this embodiment, it can also be represented by S _i . For example, S ₀ represents the PUCCH-based semi-persistent CSI reporting configuration with the smallest CSI-ReportConfigId in csi-ReportConfigGroupToAddModList. S ₀ = 0 indicates deactivation of the CSI reporting corresponding to the CSI-RS resource group, and S ₀ = 1 indicates activation of the CSI reporting corresponding to the CSI-RS resource group. csi-ReportConfigGroupToAddModList is used to indicate whether the CSI-RS resource group is added to the activation list. The configuration of the CSI-RS resources in the above-mentioned methods 2, 3, and 4 can also be activated through MACCE.

Scenario 2: Semi-persistent CSI reporting, CSI reporting carried on PUSCH

For semi-persistent CSI reporting, the reporting method of the CSI carried on PUSCH, the CSI reporting is triggered by DCI, and is associated with the corresponding CSI-SemiPersistentOnPUSCH-TriggerState through the CSIrequest field in the DCI, and each TriggerState corresponds to a CSI-ReportConfig. In this embodiment, DCI is required to simultaneously activate the reporting of CSI corresponding to multiple CSI-RS resource groups. Therefore, a new CSIrequest field can be added to the DCI, such as CSIrequest1, which is associated with the same or different triggerstates through CSIrequest and CSIrequest1, and then associated with different CSI-ReportGroupConfigs, where CSI-ReportGroupConfig can configure the CSI reporting configuration corresponding to the CSI-RS resource group. At the same time, the DCI information may also support one or more ‘Timedomainresourceassignment’ configurations. When the DCI contains one ‘Timedomainresourceassignment’, the CSI corresponding to the two CSI-RS resource groups are reported in the same time slot. If the DCI contains multiple ‘Timedomainresourceassignment’s, for example, ‘Timedomainresourceassignment’ is used to indicate the CSI reporting time information corresponding to the first CSI-RS resource group, and ‘Timedomainresourceassignment1’ is used to indicate the CSI reporting time information corresponding to the second CSI-RS resource group, the two may be the same or different; furthermore, the CSI reporting corresponding to different CSI-RS resource groups can be configured with the same/different reporting periods; furthermore, for the above-mentioned CSI-RS resource configuration methods of method 2, method 3, and method 4, this method can also be used to trigger the reporting of CSI corresponding to multiple CSI-RS resource sets, except that the CSI reporting configuration information corresponding to one CSI-RS resource set is configured in CSI-ReportConfig.

Scenario 3: Aperiodic CSI reporting, CSI reporting carried on PUSCH

For non-periodic CSI reporting, the reporting method of CSI reporting carried on PUSCH, the CSI reporting is triggered by DCI, and is associated with the corresponding CSI-SemiPersistentOnPUSCH-TriggerState through the CSIrequest field in the DCI, and each trigger state (TriggerState) corresponds to a CSI-ReportConfig and its corresponding resource set; in this embodiment, DCI is required to simultaneously activate the CSI reporting corresponding to multiple CSI-RS resource groups, so here a new CSIrequest field can be added to the DCI, such as CSIrequest1, which is associated with the same or different triggerstate through CSIrequest and CSIrequest1, and then associated with different CSI-ReportGroupConfig, and the CSI-RS resource group corresponding to the CSI-ReportGroupConfig, where the CSI-ReportGroupConfig can configure the CSI reporting configuration corresponding to the CSI-RS resource group; and then through the CSI-RS resource group information and the corresponding CSI-ResourcetGroupConfigId determines the information of the resource group in nzp-CSI-RS-ResourceGroupList; at the same time, the DCI information may also support one or more 'Time domain resource assignment' configurations. When the DCI contains one 'Time domain resource assignment', the CSI corresponding to the two CSI-RS resource groups are reported in the same time slot. If the DCI contains multiple 'Time domain resource assignments', for example, 'Time domain resource assignment' is used to indicate the CSI reporting time information corresponding to the first CSI-RS resource group, and 'Time domain resource assignment1' is used to indicate the CSI reporting time information corresponding to the second CSI-RS resource group. The two may be the same or different.

In addition, for the configuration methods of CSI-RS resources in the above-mentioned methods 2, 3, and 4, this method can also be used to trigger the reporting of CSI corresponding to multiple CSI-RS resource sets. The base station 110 uses two CSI request fields through DCI, which are respectively associated with different trigger states. A resource set and its corresponding CSI-ReportSetConfigId are configured under each trigger state, so as to associate with the corresponding CSI-ReportSetConfig according to the CSI-ReportSetConfigId information, and then determine the resource set information in nzp-CSI-RS-ResourceSetList according to the resource set and CSI-ReportSetConfig configuration. At the same time, the DCI information may also support one or more ‘Time domain resource assignment’ configurations. When the DCI contains one ‘Time domain resource assignment’, the CSI corresponding to the two CSI-RS resource groups are reported in the same time slot. If the DCI contains multiple ‘Time domain resource assignments’, for example, ‘Time domain resource assignment’ is used to indicate the CSI reporting time information corresponding to the first CSI-RS resource group, and ‘Time domain resource assignment1’ is used to indicate the CSI reporting time information corresponding to the second CSI-RS resource group, the two may be the same or different.

In addition, for scenarios 2 and 3, the base station 110 can use a CSI request field through DCI to simultaneously associate with different trigger states, for example, to two consecutive trigger states, or to different trigger states based on a standard predefined method, such as a CSI request plus an offset method; secondly, a resource set and its corresponding CSI-ReportSetConfigId are configured under each trigger state, so as to associate with the corresponding CSI-ReportSetConfig according to the CSI-ReportSetConfigId information, and then determine the resource set information in the nzp-CSI-RS-ResourceSetList according to the resource set and the CSI-ReportSetConfig configuration, and the remaining steps reuse the above processing method; furthermore, for the configuration of the Time domain resource assignment in scenarios 2 and 3, it is also possible to support the CSI reporting corresponding to two CSI-RS resource groups or resource sets in different time slots by using a Time domain resource assignment plus an offset method.

It should be noted that for the CSI reporting enhancement with CRI extension, based on the CSI-RS resources configured in the above-mentioned methods 1 to 4, when reporting CRI, the specific CRIs to be reported may be determined by the base station 110, or by the user equipment 120, or jointly determined by the base station 110 and the user equipment 120. For example, the base station 110 instructs the user equipment 120 on the number of CRIs reported, and the user equipment 120 decides which CRIs to report and their corresponding CSIs. Therefore, for the different CSI-RS resource configurations mentioned above, the method of ultimately reporting the CRI information by the user equipment 120 will also vary. To this end, for the different CSI-RS resource configurations mentioned above, this embodiment provides possible CRI reporting methods:

For the case in method 1 where all CSI-RS resources are in one CSI-RS resource set, and in this resource set, the CSI-RS resources can be divided into multiple groups, first, if the CSI measured by all CSI-RS resources needs to be reported, the user equipment 120 does not need to report the CRI information; second, if the CSI measured by all CSI-RS resources in a certain CSI-RS resource group needs to be reported, then for the CSI-RS resource group, there is no need to report the corresponding CRI information; similarly, for methods 2 to 4, if the CSI measured by all CSI-RS resources in a certain CSI-RS resource set needs to be reported, then the CRI information does not need to be reported for the CSI-RS resource set; in addition, the indication of the above-mentioned CRI information, if the reported CSI is distinguished between part 1 and part 2, the CRI information is carried in part 1.

Example 7

In some embodiments, each CSI is determined based on different codebook parameters or codebook parameter combinations. In some embodiments, each CSI is determined based on different codebook parameters or codebook parameter combinations, wherein the codebook parameter combinations include: spatial basis, Frequency domain basis and non-zero coefficients, the CSI is determined based on different numbers of spatial basis, the same number of frequency domain basis and the same selection factor of non-zero coefficients. Through the above method, the reporting accuracy of CSI can be improved.

Specifically, for the reporting of the above-mentioned CSI, whether for a CSI-RS resource group or for a CSI-RS resource set, the acquisition of the CSI corresponding to the above-mentioned CRI can be based on the Rel-15 Type I single panel codebook or the Rel-16 eType II codebook. Considering that different beams may experience large differences in channels, in order to ensure the accuracy of the CSI reported by the user equipment 120, it is reasonable to configure different codebook parameter combinations/codebook parameters for the acquisition of the CSI corresponding to different CRIs. When the base station 110 configures the codebook parameter combination/codebook parameters for the user equipment 120, there may be multiple configuration methods, which may specifically include at least one of the following methods:

Method 1: For all CSI-RS resources used for CRI reporting enhancement, regardless of whether they are located in the same measurement resource set, the CSI corresponding to all CSI-RS resources is acquired based on the same set of codebook parameter combinations or codebook parameters. For example, if CSI acquisition is based on the Rel-16 eType II codebook, then the CSI corresponding to all CSI-RS resources is acquired based on the same codebook parameter combination. That is, the base station 110 only needs to configure one set of codebook parameter combinations for the user equipment 120. For further explanation, it can be assumed here that the codebook parameter combination indicated by the base station 110 is any row of codebook parameter combinations in 3GPP 38.214 Table 5.2.2.2.5-1, or other codebook parameter combinations. If CSI acquisition is based on the Rel-15 Type I single-panel codebook, then the CSI corresponding to all CSI-RS resources is acquired based on the same codebook parameter configuration, for example, all are based on mode 1/mode 2, and the value of the number L of spatial bases is the same.

Method 2: For all CSI-RS resources used for CRI reporting enhancement, regardless of whether they are located in the same measurement resource set, the CSI corresponding to all CSI-RS resources is obtained based on the same/different codebook parameter combinations or codebook parameters, or the CSI corresponding to some CSI-RS resources is obtained based on the same codebook parameter combination or codebook parameters. For example, when the CSI acquisition is based on the Rel-16 eType II codebook, the base station 110 may indicate multiple sets of codebook parameter combinations/codebook parameters when instructing the user equipment 120 to calculate the CSI. The specific set of parameters used for the calculation of the CSI corresponding to each CRI is determined by the user equipment 120, and the user equipment 120 needs to report the CSI when reporting the CSI. The selected codebook parameter combination/codebook parameter information is fed back to the base station 110, or the codebook parameter combination/codebook parameter used to calculate the CSI is distinguished by the order of reporting the CRI. It can be assumed here that the number of codebook parameter combinations/codebook parameters indicated by the base station 110 is equal to the number of reported CRIs and corresponding CSIs. It should be noted that the multiple sets of codebook parameter combinations/codebook parameters indicated by the base station 110 may have some of the same conditions, as follows: the indexes of the codebook parameters configured by the base station 110 are {2, 3, 2, 4}, where the first and third codebook parameter combinations/codebook parameter indexes are the same, and the first CRI reported by the user equipment 120 corresponds to a codebook parameter combination 2, the second CRI reported by the user equipment 120 corresponds to a codebook parameter combination 3, and so on. For CSI acquisition based on the Rel-15 Type I single-panel codebook, base station 110 may configure different codebook parameters for user equipment 120. It is assumed here that base station 110 configures multiple candidate spatial basis L values for user equipment 120, where L∈{1,4,6,8,10}. User equipment 120 selects the appropriate codebook parameter L when calculating the CSI corresponding to different CRIs and feeds back the selected codebook parameter combination/codebook parameter information to base station 110 when reporting CSI. Similar to CSI acquisition based on the Rel-16 eType II codebook, the multiple sets of codebook parameters indicated by base station 110 may have some overlap. For example, the multiple L values indicated by base station 110 may be {1, 4, 4, 6}, where the second and third L values are the same, 4. Note that the number of codebook parameter combinations or spatial basis L given above is the same as the number of CRIs that base station 110 indicates user equipment 120 needs to report.

In addition, if the CRI reported by the user equipment 120 and the number of corresponding CSIs are determined by the user equipment 120, then when the base station 110 instructs the user equipment 120 to calculate the codebook parameter combination/codebook parameter, the number of configured codebook parameter combinations/codebook parameters is the same as the number of CSI-RS resources configured by the user equipment 120. For example, if the base station 110 configures _Ks CSI-RS resources for the user equipment 120 for channel measurement, the number of codebook parameter combinations/codebook parameters indicated by the base station 110 to the user equipment 120 is also _Ks , but there may be multiple identical codebook parameter combinations/codebook parameters in these _Ks codebook parameter combinations. Furthermore, the user equipment 120 may also indicate N sets of configuration information including _Ks codebook parameter combinations/codebook parameters, and the user equipment 120 selects one of these N sets to calculate the CSI corresponding to the CSI-RS resource. For example, When _Ks =4, the N=2 codebook parameter combinations containing _Ks =4 indicated by the base station 110 are {1,2,2,1} and {2,1,1,2}. The base station 110 selects one of the two codebook parameter combinations to calculate the CSI and reports it.

Method 3: Similar to the method in Method 2, all CSI-RS resources used for CRI reporting enhancement, regardless of whether they are located in the same measurement resource set, are obtained based on the same/different number of spatial basis bases for all CSI-RS resources, or the CSI corresponding to some CSI-RS resources is obtained based on the same number of spatial basis bases, while the number of frequency domain basis bases is the same, and the selection factors of the non-zero coefficients can also be the same or different. For example, when CSI acquisition is based on the Rel-16 eType II codebook, the base station 110 may indicate multiple sets of codebook parameter combinations/codebook parameters when instructing the user equipment 120 to calculate the CSI. The number of frequency domain basis and the selection factor of non-zero coefficients corresponding to different codebook parameter combinations in the multiple sets of codebook parameter combinations/codebook parameters are the same. The specific set of parameters used for calculating the CSI corresponding to each CRI is determined by the user equipment 120, and the user equipment 120 needs to feedback the selected codebook parameter combination/codebook parameter information to the base station 110 when reporting the CSI, or distinguish its calculation of CSI by the order of reporting CRI. Which set of codebook parameter combinations/codebook parameters is used, or the user equipment 120 feeds back the selected number of spatial basis to the base station 110. It can be assumed here that the number of codebook parameter combinations/codebook parameters indicated by the base station 110 is equal to the number of reported CRIs and corresponding CSIs. It should be noted that the multiple sets of codebook parameter combinations/codebook parameters indicated by the base station 110 may have some of the same situations, as follows: the number of spatial basis configured by the base station 110 is {2, 4, 2, 6}, where the first and third spatial basis are the same, and the number of spatial basis corresponding to the first CRI reported by the user equipment 120 is 2, the number of spatial basis corresponding to the second CRI reported by the user equipment 120 is 4, and so on. For CSI acquisition based on the Rel-15 Type I single-panel codebook, base station 110 may configure different numbers of spatial bases for user equipment 120. Here, it is assumed that base station 110 configures multiple candidate spatial bases L for user equipment 120, with values L∈{1, 4, 6, 8, 10}. User equipment 120 selects an appropriate spatial base L when calculating the CSI corresponding to different CRIs and feeds back the selected spatial base information to base station 110 when reporting CSI. Similar to CSI acquisition based on the Rel-16 eType II codebook, the multiple sets of codebook parameters indicated by base station 110 may have some of the same parameters. For example, the multiple L values indicated by base station 110 are {1, 4, 4, 6}, where the second and third L values are the same, 4. It should be noted that the codebook parameter combinations or the number of spatial bases L given above are the same as the number of CRIs that base station 110 indicates that user equipment 120 needs to report.

In addition, if the CRI reported by the user equipment 120 and the number of corresponding CSIs are determined by the user equipment 120, then when the base station 110 instructs the user equipment 120 to calculate the codebook parameter combinations/codebook parameters, the number of configured codebook parameter combinations/codebook parameters is the same as the number of CSI-RS resources configured by the user equipment 120. For example, if the base station 110 configures _Ks CSI-RS resources for the user equipment 120 for channel measurement, the number of codebook parameter combinations/codebook parameters indicated by the base station 110 to the user equipment 120 is also _Ks , but there may be multiple identical spatial basis numbers in these _Ks codebook parameter combinations. Furthermore, the user equipment 120 may also indicate N sets of configuration information including _Ks codebook parameter combinations/codebook parameters, and the user equipment 120 selects one of these N sets to calculate the CSI corresponding to the CSI-RS resource. For example, when K _s = 4, the N = 2 sets indicated by base station 110 include K _s = 4 codebook parameters, where the number of spatial bases corresponding to the codebook parameters is {2, 2, 4, 4} and {2, 4, 4, 2}. Then, base station 110 selects one of the two codebook parameter combinations for calculating the CSI and reports it. Note that the multiple codebook parameter combinations configured above may also correspond to the same frequency domain base, but have different or partially identical spatial bases and non-zero coefficient selection factors.

Method 4: Based on the sixth embodiment, the reporting of multiple CRIs and the corresponding CSI may be implemented through multiple CSI reporting instances. Therefore, the codebook parameter configuration for different CSI reporting instances is considered here. This embodiment considers that the codebook parameter combination/codebook parameter configuration method of the above-mentioned methods 1, 2, and 3 are also applicable to the CSI-RS resource configuration method based on multiple CSI-RS resource groups or multiple CSI-RS resource sets mentioned in the sixth embodiment. For example, a CSI-RS resource group or a CSI-RS resource set can be regarded as a whole, and the specific configuration method can adopt the methods described in methods 1, 2, and 3, which will not be repeated here.

Example 8

This embodiment mainly solves the problem of CSI enhancement based on CRI to support a maximum of 128 antenna ports. If the acquisition of CSI corresponding to CRI is based on the Rel-16 eTypeII codebook and based on the configuration of different CSI-RS resource numbers, Rel-16 eTypeII The number of antenna ports that may be supported by the codebook may also vary. Therefore, the processing complexity requirements for the user equipment 120 may also vary. This embodiment mainly solves the CPU usage problem of CSI enhancement based on CRI when different resource configurations and codebook parameter combinations are configured.

In some embodiments, for each CSI reporting instance, the number of CPUs occupied by the CSI processing unit during the calculation process of each CSI reporting instance is not cumulative. This allows the user equipment 120 to obtain the number of CPUs occupied by the calculation process of each CSI reporting instance, preventing the user equipment 120 from consuming more CPUs in the same time period, thereby reducing the resource usage of the user equipment 120 in that time period.

Specifically, referring to the CPU calculation rule of the Rel-16 eTypeII codebook, the number of CPUs corresponding to codebook measurement and CSI reporting for a single CSI-RS resource with a maximum of 32 antenna ports is 1. For enhancement based on the Rel-16 eTypeII codebook, the base station 110 configures K _s CSI-RS resources for the user equipment 120 for channel measurement, and reports based on different CSI reporting instances according to the CSI-RS resource configuration method mentioned in Example 7 and the different CSI-RS resource groups or CSI-RS resource sets described in Example 6; if different CSI reporting time domains do not overlap, it is necessary to calculate the number of CPUs occupied by the user equipment 120 for different CSI reporting instances. The calculation method for the number of CPUs corresponding to each CSI reporting instance is the same as method one to method five, but it is necessary to consider the number of CSI-RS resources configured in each CSI-RS resource group or CSI-RS resource set. It is assumed here that the number of CSI-RS resources corresponding to the CSI-RS resource set/group one and the CSI-RS resource set/group two are K respectively. _s1 and _Ks2 , then when calculating the number of CPUs occupied by CSI reporting instance 1 and CSI reporting instance 2, it is only necessary to replace the number of CSI-RS resources _Ks in methods 1 to 5 with _Ks1 and _Ks2 . To better control the number of CPUs occupied by user equipment 120, user equipment 120 expects that the CSI processing of the two CSI reporting instances does not overlap in the time domain.

In some embodiments, for a case where there is only one CSI reporting instance (the number of CSI-RS resources is _Ks ) and for each CSI reporting instance in multiple reporting instances (the number of CSI-RS resources is _Ks1 or _Ks2 ), the number of CPUs occupied for reporting the multiple CSIs corresponding to the multiple CRIs is determined based on at least one of the following methods: the CSI-RS resource configuration information includes _Ks (or _Ks1 or _Ks2 ) CSI-RS resources for channel measurement, and the number of CPUs occupied is determined based on _Ks (or _Ks1 or _Ks2 ); at least one CSI reporting instance includes N CRIs; the number N is indicated by the base station 110 or determined by the user equipment 120; the number of CPUs occupied is determined based on N; the CSI-RS resource configuration information includes Ks CSI-RS resources for channel measurement, when the _Ks is less than or equal to a predefined threshold, the number of CPUs occupied is determined based on Ks; when the _Ks is less than or equal to a predefined threshold, the number of CPUs occupied is determined based on _Ks ; When _s is greater than a predefined threshold, the number of occupied CPUs is determined based on _X1 and _Ks , where _X1 is taken from a first set, which can be {0.25, 0.375, 0.5}; the CSI-RS resource configuration information includes _Ks CSI-RS resources for channel measurement, and at least one CSI reporting instance includes N CRIs. When _Ks is less than or equal to a predefined threshold, the number of occupied CPUs is determined based on N; when _Ks is greater than a predefined threshold, the number of occupied CPUs is determined based on _X1 and N, where _X1 is taken from the first set. Through the above method, user equipment 120 can determine the number of occupied CPUs.

Specifically, the method for determining the number of CPUs occupied by the user equipment 120 includes at least one of the following:

Method 1: Referring to the CPU calculation rules of the Rel-16 eType II codebook, the number of CPUs corresponding to codebook measurement and CSI reporting for a single CSI-RS resource with a maximum of 32 antenna ports is 1. For Rel-16 eType II codebook enhancement, the base station 110 configures _Ks CSI-RS resources for the user equipment 120 for channel measurement. The user equipment 120 may need to calculate the corresponding CSI for each CSI-RS resource. Therefore, the number of CPUs that the user equipment 120 may require is related to the number of CSI-RS resources. The specific number of CPUs occupied by the user equipment 120 can be expressed as O _cpu = _Ks .

Method 2: Referring to the CPU calculation rules of the Rel-16 eTypeII codebook, when performing codebook measurement and CSI reporting for a single CSI-RS resource with a maximum of 32 antenna ports, the corresponding number of CPUs is 1. For Rel-16 eTypeII codebook enhancement, the base station 110 configures K _s CSI-RS resources for the user equipment 120 for channel measurement, and the number of CSI reported by the user equipment 120 can be indicated by the base station 110 or determined by the user equipment 120 itself. When determining how many CRIs to report and their corresponding CSIs, the user equipment 120 may not need to calculate the specific CSI. Therefore, it is considered here that the number of CPUs required by the user equipment 120 and the number of CSIs corresponding to the CSI-RS measurement resources reported by the user equipment 120 are equal. The number of CPUs occupied by the user equipment 120 can be expressed as O _cpu =N, where N is the number of CSIs corresponding to the CSI-RS resources reported by the user equipment 120.

Method 3: Referring to the CPU calculation rules of the Rel-16 eType II codebook, the number of CPUs corresponding to codebook measurement and CSI reporting for a single CSI-RS resource with a maximum of 32 antenna ports is 1. For Rel-16 eType II codebook enhancement, the base station 110 configures K _s CSI-RS resources for the user equipment 120 for channel measurement. The base station 110 may restrict the number of antenna ports corresponding to the CSI-RS resources. For example, when K _s ≤ 4, the maximum number of antenna ports for the CSI-RS resources that the base station 110 can configure for the user equipment 120 is 32. When K _s > 4, the maximum number of antenna ports for the CSI-RS resources that the base station 110 can configure for the user equipment 120 is 16. Therefore, here, when K _s ≤ 4, the number of CPUs occupied by the user equipment 120 is O _cpu = K _s ; and when the number of CSI-RS resources configured by the base station 110 for the user equipment 120 is K _s >4, the number of CPUs occupied by the user equipment 120 is O _cpu =X ₁ K _s , where the value of X ₁ can be {0.25, 0.375, 0.5}, where X ₁ ∈ {0.25, 0.375, 0.5} is reported through the capabilities of the user equipment 120 .

Method 4: Referring to the CPU calculation rules of the Rel-16 eType II codebook, the number of CPUs corresponding to codebook measurement and CSI reporting for a single CSI-RS resource with a maximum of 32 antenna ports is 1. For Rel-16 eType II codebook enhancement, the base station 110 will configure K _s CSI-RS resources for the user equipment 120 for channel measurement, and the base station 110 may restrict the number of antenna ports corresponding to the CSI-RS resources. For example, when K _s ≤ 4, the maximum number of antenna ports for the CSI-RS resources that the base station 110 can configure for the user equipment 120 is 32, and when K _s > 4, the maximum number of antenna ports for the CSI-RS resources that the base station 110 can configure for the user equipment 120 is 16. Therefore, here, when K _s ≤ 4, if the number of CRIs and corresponding CSIs reported by the user equipment 120 is N, the number of CPUs occupied by the user equipment 120 is O _cpu. =N; and when the number of CSI-RS resources K _s configured by the base station 110 for the user equipment 120 is >4, if the number of CRIs and corresponding CSIs reported by the user equipment 120 is N, the number of CPUs occupied by the user equipment 120 is O _cpu =X ₁ N, where the value of X ₁ can be {0.25, 0.375, 0.5}, where X ₁ ∈ {0.25, 0.375, 0.5} is reported according to the capability of the user equipment 120.

Method 5: Referring to the CPU calculation rules of the Rel-16 eType II codebook, the number of CPUs corresponding to codebook measurement and CSI reporting for a single CSI-RS resource with a maximum of 32 antenna ports is 1. For Rel-16 eType II codebook enhancement, the base station 110 configures _Ks CSI-RS resources for the user equipment 120 for channel measurement. The base station 110 may also indicate multiple codebook parameter combinations to the user equipment 120 (for example, the codebook parameter configuration method mentioned in Example 7), and the user equipment 120 may select from the multiple codebook parameter combinations. This further increases the processing complexity of the user equipment 120, and the increase in the processing complexity of the user equipment 120 is related to the number of configured codebook parameter combinations. Therefore, the number of CPUs occupied by the user equipment 120 when multiple codebook parameter combinations are configured is given here as: O _cpu = X ₂ K _s , where X ₂ can be a value of {1, 1.5, 2, 2.5, 3, 3.5, 4}, where X ₂ ∈{1, 1.5, 2, 2.5, 3, 3.5, 4}, X ₂ is reported through the user equipment 120 capability.

Method 6: Referring to the CPU calculation rules of the Rel-16 eType II codebook, the number of CPUs corresponding to codebook measurement and CSI reporting for a single CSI-RS resource with a maximum of 32 antenna ports is 1. For Rel-16 eType II codebook enhancement, the base station 110 will configure K _s CSI-RS resources for the user equipment 120 for channel measurement, and the base station 110 may indicate multiple sets of codebook parameter combinations to the user equipment 120 (for example, the codebook parameter configuration method mentioned in Example 7), and the user equipment 120 may select from multiple sets of codebook parameter combinations, which further increases the processing complexity of the user equipment 120. The increase in the processing complexity of the user equipment 120 is related to the number of configured codebook parameter combinations. The same standard may also constrain the maximum number of antenna ports for the configured CSI-RS resources. For example, when K _s ≤ 4, the maximum number of antenna ports for the CSI-RS resources that the base station 110 can configure for the user equipment 120 is 32. When K _s >4, the maximum number of antenna ports that the base station 110 can configure for the CSI-RS resources of the user equipment 120 is 16; therefore, when K _s ≤4, the number of CPUs occupied by the user equipment 120 can be expressed as O _cpu =X ₂ K _s , where the value of X ₂ can be {1, 1.5, 2, 2.5, 3, 3.5, 4}, where X ₂ ∈ {1, 1.5, 2, 2.5, 3, 3.5, 4} is reported by the capability of the user equipment 120. When the number K _s > 4, the number of CPUs occupied by the user equipment 120 is O _cpu = X ₃ K _s , where the value of X ₃ can be {0.5, 1, 1.5, 2}, where X ₃ can be reported by the capability of the user equipment 120.

Example 9

For CSI reporting enhancement based on CRI extension, the user equipment 120 may report multiple CRIs and the corresponding CSI. The CSI may include at least one of RI, PMI, and CQI. For example, the number of CSI-RS resources supported by the user equipment 120 for channel measurement is _Ks , where the maximum value of _Ks is 8, and the maximum number of CRIs reported by the user equipment 120 may be 8. Therefore, if the traditional CRI indication method is used, each CRI indication requires 3 bits. If multiple CRIs are reported, the CRI indication overhead will be relatively large. Therefore, this embodiment considers other forms of CRI reporting. Specifically, CRI reporting may be carried out in the following manner:

Solution 1: If the user equipment 120 reports the CSI corresponding to multiple CSI-RS resources, the CRI can be reported in a combination number manner. Assuming that the number of CSI-RS resources is _Ks , and the number of CSIs corresponding to the CSI-RS resources to be reported is M, then the positions of the CSIs corresponding to the M CSI-RS resources in all CSI-RS resources can be expressed in a combination number manner as follows: That is, M CSI-RS resources are selected from K _s CSI-RS resources, and the specific number of bits required is

Solution 2: If the user equipment 120 reports the CSI corresponding to multiple CSI-RS resources, the CRI can be reported in a bitmap manner. Assuming that the number of CSI-RS resources is _Ks , and the number of CSIs corresponding to the CSI-RS resources that need to be reported is M, then the positions of the CSIs corresponding to these M CSI-RS resources in all CSI-RS resources can be indicated by a bitmap. If the corresponding bit is 1/0, it means that the CSI corresponding to the CSI-RS resource of the current index is reported. On the contrary, if the bit is 0/1, it means that the CSI corresponding to the CSI-RS resource of the current index is not reported.

Solution 3: The number of CSI-RS resources corresponding to the CSI reported by the user equipment 120 may be configured on the network side. Assuming that the number of CSI corresponding to the CSI-RS resources reported by the user equipment 120 configured on the network side can be {2, 4, 6, 8}, the user equipment 120 can determine which method to use to instruct the network side to report which CSI-RS resources correspond to the CSI according to the number of CSI corresponding to the CSI reported by the network configuration. For example, the number of CSI-RS resources configured by the network side for the user equipment 120 side is 8, and the number of CSIs corresponding to the CSI-RS resources reported by the user equipment 120 side is 2. Obviously, at this time, the user equipment 120 side can use the existing CRI indication method to inform the network side which CSI-RS resources correspond to the CSI reported, that is, use two 3 bits to indicate which two CSI-RS resources correspond to the CSI reported; and if the number of CSI-RS resources corresponding to the CSI reported by the network side is 6, it is obvious that the user equipment 120 side uses the bitmap (Scheme 2) or combination number (Scheme 1) method. The number of bits required is smaller, so the user equipment 120 side can use the bitmap or combination number method to inform the network side which CSI-RS resources correspond to the CSI reported by the user equipment 120. In summary, this embodiment proposes that the method used by the user equipment 120 to report CRI can be determined based on the number of CSI-RS resources for channel measurement configured by the network side to the user equipment 120 side, and the number of reported CRIs configured by the network side to the user equipment 120 side. For example, when the number of CSI-RS resources configured by the network side is less than or equal to a certain threshold value Q, the CSI corresponding to all CSI-RS resources may need to be reported, where Q may take values of 1/2/3/4/5/6; when the number of CSI-RS resources _Ks configured by the network side is less than or equal to a certain threshold value Q, and the number of reported CRIs M configured by the network side is less than or equal to a certain threshold value E, the user equipment 120 side uses the traditional CRI method to indicate the CSI corresponding to those CSI-RS resources to be reported, that is, the number of bits occupied by each CRI is When the number M of CRIs to be reported, as configured by the network, is greater than the threshold value E, the user equipment 120 uses the combination number method described in Solution 1 or the bitmap method described in Solution 2 to inform the user equipment 120 of the selected CSI-RS resources for CSI reporting. The threshold value Q may be any value from 1 to 8, the number of CSI-RS resources _Ks is less than or equal to Q, the threshold value E is less than or equal to _Ks , and the value of M is less than or equal to _Ks .

Solution 4: Assuming that the number of CSI-RS resources configured by the network for channel measurement is _Ks , the number of CSI-RS resources corresponding to the CSI reported by the user equipment 120 may be determined by the user equipment 120. A threshold value E can be set. When the number M of CSI corresponding to the CSI-RS resources reported by the user equipment 120 is less than or equal to the threshold value E, the user equipment 120 can indicate the CSI corresponding to those CSI-RS resources in the traditional CRI manner. That is, the number of bits occupied by each CRI is When the number M of CSI corresponding to the CSI-RS resources reported by the user equipment 120 is greater than or equal to the threshold value E, the user equipment 120 uses the combination number method in the above-mentioned solution 1 or the bitmap method in the solution 2 to inform the user equipment 120 of the CSI reporting corresponding to the selected CSI-RS resources. However, the user equipment 120 is required to use 1 bit to inform the network side of which indication method is used. If the CSI reporting distinguishes between part 1 and part 2, the indication method can be placed in part 1. If the CSI reporting distinguishes between multiple reporting sub-instances, the indication method can be placed in the sub-instance with a higher reporting sub-instance priority.

The threshold value E may be any value between 1 and 8, and the number of CSI-RS resources K _s is less than or equal to 8, and the threshold value E is less than or equal to K _s .

It should be noted that the above solutions are also applicable to codebook enhancement based on CRI reporting. The codebook can be a Type-I codebook enhancement based on Rel-15, and is also applicable to an eTypeII codebook enhancement based on Rel-16.

Solution 5: Assuming that the number of CSI-RS resources configured by the network for channel measurement is _Ks , the standard can determine in a predefined manner which form to use to report the CSI corresponding to those CSI-RS resources. For example, it can be determined in a predefined manner that when the number of _Ks is less than or equal to a certain threshold E, the user equipment 120 can use the traditional CRI method to indicate the CSI corresponding to those CSI-RS resources to be reported, that is, the number of bits occupied by each CRI is Or the user equipment 120 uses the combination number method in the above solution 1 or the bitmap method in the solution 2 to inform the user equipment 120 of the CSI reporting corresponding to the selected CSI-RS resources; when the number of _Ks is greater than or equal to a certain threshold E, the user equipment 120 uses the combination number method in the above solution 1 or the bitmap method in the solution 2 to inform the user equipment 120 of the CSI corresponding to the selected CSI-RS resources, or the user equipment 120 uses the traditional CRI method to indicate the CSI corresponding to the CSI-RS resources to be reported, that is, the number of bits occupied by each CRI is

Example 10

For Rel-16 eType II and Rel-18 eType PMI prediction codebook enhancement, a maximum of 128 antenna ports are supported. Since the selection of the spatial basis still requires the selection of L = 2/4/6/8 beams from 64 spatial basis even if a common polarization method is used, the selection overhead is relatively large. For example, for L = 4, the spatial basis selection indication requires 20 bits. If the user equipment 120 supports a larger number of ranks, the indication overhead is processed according to the existing standard. The number of bits required for the spatial basis indication is proportional to the number of ranks, and the selection of spatial basis of different ranks also requires the indication of the corresponding oversampling group. In this way, the reporting overhead of the user equipment 120 indicating the selection of the spatial basis will be further increased. Furthermore, the indication of the spatial basis is expressed in the form of a combination number. When the number of antenna ports is 128, the table corresponding to the combination number selection requires 64 rows, and the table needs to be stored in the memory of the UE, which occupies a large amount of memory. Therefore, this embodiment considers reducing the reporting overhead of the user equipment 120 indicating the spatial basis, while also considering reducing the occupancy of the combination number table on the UE. The specific solution is as follows:

Solution 1: For the Rel-16 eTypeII enhanced codebook or the Rel-18 eTypePMI prediction enhanced codebook, the indication overhead of the specific selection of the oversampling group can be expressed as O ₁ corresponds to the number of oversampling times in the horizontal direction, and O ₂ corresponds to the number of oversampling times in the vertical latitude. In order to reduce the overhead indicated by the user equipment 120, the spatial oversampling groups corresponding to different ranks or layers can be made the same, which can reduce the reporting overhead indicated by the user equipment 120.

Solution 2: Since the number of selected spatial basis is relatively small compared to the candidate spatial basis, for example, under 128 antenna ports, L = 2/4/6/8 spatial basis needs to be selected from 64 candidate basis. The possible selected spatial basis is in a subset of the candidate spatial basis. Therefore, it is possible to consider grouping the candidate spatial basis. For example, the number of candidate spatial basis corresponding to a single polarization direction is N, the number of spatial basis to be selected is L, and the number of candidate basis in each group is M. Then the candidate spatial basis can be divided into N/M groups. The number of spatial basis that may be included in the candidate basis corresponding to each group can be represented by Xbit. The specific value of X can be related to the number of spatial basis L indicated by the network side, and can be determined as follows: when L = 2, X can be 1 or 2; when L = 4, X can be 2; when L = 6, X can be The value of X can be used to determine the number of selected spatial basis elements included in each candidate spatial basis group. It should be noted that only the number of selected spatial basis elements included in the N/M-1 candidate spatial basis groups needs to be indicated. The number of selected spatial basis elements that may be included in the last candidate spatial basis group can be inferred based on the previous indication, thereby saving the overhead of indicating the number of selected basis elements in the last candidate spatial basis group. For L = 2, if 1 bit is used to indicate the number of selected spatial basis elements in each candidate spatial basis group, the 1 bit is actually used to indicate whether a spatial basis element is selected in the current candidate basis group. For example, when the bit is 1, it indicates that a spatial basis element is selected, while 0 indicates that no spatial basis element is selected. Furthermore, considering that the number of antenna ports supported by the network or user equipment 120 is {48, 64, 128}, the value of the number of candidate basis elements M in each group can be any one of {8, 12, 16, 24, 32}, as long as M is divisible by N. Specifically, the number of candidate basis groups in each group may be indicated by the network, predefined by the standard, or selected by the user equipment 120 based on the predefined standard. For example, the standard may predefine M to have multiple values, and the user equipment 120 may select an appropriate predefined value of M based on the distribution of the specifically selected spatial basis in all candidate spatial basis bases, and indicate the corresponding selection information to the network side. Note that the network-side indication or standard predefine may also be the number of grouped candidate spatial basis bases. Compared with the network-side indication or standard predefine of the number of candidate basis bases in each group, the two achieve the same effect and are not described in detail here. Since the candidate spatial basis bases are grouped, the user equipment 120 only needs to indicate which spatial basis bases are selected in the number M of candidate basis bases in each group. In this way, the user equipment 120 only needs to store a list of the number of combinations based on M, thereby reducing the storage overhead of the user equipment 120. In addition, it should be noted that if the corresponding indication information in a candidate spatial basis group indicates that no spatial basis is selected in the candidate spatial basis group, then this part of the information does not need to be indicated.

If the position of the above-mentioned indication information in the CSI is considered, if the above-mentioned CSI is divided into part 1 and part 2, then the indication information of the number of selected spatial basis groups contained in the candidate spatial basis group can be placed in part 1, and the position indication information of the specific selected spatial basis in the candidate spatial basis group can be placed in part 2.

Example 11

In Rel-18, MTRP CJT assumes perfect synchronization between TRPs. However, in real systems, non-ideal synchronization between TRPs often exists, severely degrading CJT performance. The factors that lead to non-ideal synchronization between multiple TRPs mainly include three aspects: delay deviation, frequency deviation, and phase deviation between TRPs.

Delay variability between TRPs arises from two sources. Firstly, the propagation delay between different TRPs and UEs can vary significantly due to the different locations of the TRPs and UEs, as well as UE mobility. Secondly, hardware implementations between TRPs can also lead to differences in DL transmission timing.

Furthermore, due to oscillator instability, frequency differences between multiple TRPs in CJT are inevitable. Furthermore, the varying Doppler shifts from different TRPs to the UE can exacerbate these inter-TRP frequency differences. This frequency misalignment can lead to rapid channel variations. Consequently, CJT performance can be severely degraded due to the limited CSI update period and unavoidable CSI feedback delays. Therefore, it is necessary to measure and pre-compensate for inter-TRP frequency misalignment.

In addition, for the TDD system, which relies on SRS to obtain downlink information, inconsistent DL/UL reciprocity will cause phase offset between TRPs.

The delay deviation, frequency deviation, and phase deviation between multiple TRPs under CJT caused by the above factors will lead to asynchronous transmission between multiple TRPs, thereby reducing the performance of CJT. Therefore, it is necessary to consider achieving synchronous transmission between multiple TRPs with the assistance of user equipment 120. It is necessary to clarify what needs to be reported when user equipment 120 assists in synchronization. This embodiment solves the problem of how user equipment 120 tells the network side which TRPs to compensate for synchronization, and what reporting form to use.

Implementation plan:

According to the conclusions of the last meeting, the following cases are mainly considered for the Rel-19 non-periodic independent CJT calibration report:

Use case 1: TRP delay offset reporting:

Use Case 1.1: TRP selection, that is, selecting some or all TRPs from multiple TRPs so that the influence of different TRP delay offsets can be ignored when performing CJT.

Use case 1.2: Perform delay skew compensation on at least one TRP to ensure that the delay skew of multiple TRPs participating in the CJT does not exceed a predefined dynamic range/threshold.

Use Case 2: TRP Frequency Deviation Reporting:

Use Case 2.1: TRP selection, that is, selecting some or all TRPs from multiple TRPs so that the effects of different TRP frequency deviations can be ignored when performing CJT.

Use case 2.2: Compensate the frequency offset of each TRP on the network side so that the impact of different TRP frequency offsets can be ignored when performing CJT on multiple TRPs.

Use case 3: TRP phase misalignment reporting:

Use case 3.1: TRP selection, that is, selecting some or all of the TRPs from multiple TRPs so that the influence of phase misalignment of different TRPs can be ignored when performing CJT.

Use case 3.2: Compensate the downlink or uplink Rx-Tx phase of each TRP on the network side so that the impact of phase misalignment of different TRPs can be ignored when performing CJT on multiple TRPs.

Use case 3.3: For TDD reciprocity, reporting the timing offset of at least one pair of TRPs to assist TRP synchronization.

For use case 1.1, use case 1.2, and use case 1.3, the user equipment 120 needs to select N CSI-RS resources or CSI-RS resource sets (or TRPs corresponding to N CSI-RS resources or CSI-RS resource sets) from Ntrp CSI-RS resources or CSI-RS resource sets, and the TRPs corresponding to these N CSI-RS resources or CSI-RS resource sets can meet the CJT synchronization requirements between multiple TRPs.

For use cases 1.1, 2.1, and 3.1, the user equipment 120 may use at least one of the following solutions to report the selected N TRPs:

Solution 1: For the scenario of Ntrp=2, the two TRPs either meet the CJT synchronization requirements or do not meet the CJT synchronization requirements, so there is no need to indicate which TRP is selected separately. The status of the two TRPs can be directly indicated by 1 bit. For example, if the bit is 1/0, it means that the two TRPs meet the CJT synchronization requirements, and if the bit is 0/1, it means that the two TRPs do not meet the CJT synchronization requirements; similarly, for the scenario of Ntrp=3/4, if all TRPs meet the CJT synchronization requirements, or all TRPs do not meet the CJT synchronization requirements, it can be indicated by 1 bit, for example If the bit is 1/0, it means that all TRPs meet the CJT synchronization requirements. If the bit is 0/1, it means that all TRPs do not meet the CJT synchronization requirements. The above-mentioned synchronization requirements can refer to the delay offset of different TRPs, or the delay offset plus the delay spread are within a certain range, which does not affect the synchronization between TPRs, or has an impact on synchronization but is acceptable; it can also refer to the phase offset between different TRPs is within a certain range, which does not affect the synchronization between TRPs, or has an impact on synchronization but is acceptable; it can also refer to the frequency deviation between different TRPs is within a certain range, which does not affect the synchronization between TRPs, or has an impact on synchronization but is acceptable.

For use case 2.1/use case 2.2/use case 3.2/use case 3.3, the user equipment 120 may use at least one of the following solutions to report the corresponding synchronization compensation information:

Solution 2: For scenarios with at least two TRPs, that is, when Ntrp≥2, it is assumed that there is a reference TRP, and then the other TRPs use 1 bit to indicate whether synchronization compensation is required relative to the reference TRP. Here, 1 bit is used to indicate whether all TRPs except the reference TRP need to be synchronized and compensated. If the bit is 1/0, it means that all TRPs except the reference TRP need to be synchronized and compensated. If the bit is 0/1, it means that some TRPs except the reference TRP need to be synchronized and compensated relative to the reference TRP. If the bit indicates that all TRPs except the reference TRP need to be synchronized and compensated, the indication information of the other TRPs except the reference TRP can be indicated by default; or when the reference TRP is determined, if all other TRPs need to be synchronized and compensated, the indication information of all other TRPs can be indicated by default; the indication information of the other TRPs except the reference TRP specifically refers to whether synchronization compensation is required relative to the reference TRP using 1 bit.

In addition, here, 2 bits can also be used to indicate whether all TRPs except the reference TRP need to be compensated for synchronization. For example, 00 indicates that all TRPs except the reference TRP need to be compensated for synchronization; if it is 01, it indicates that some TRPs except the reference TRP need to be compensated for synchronization; if it is 10, it indicates that all TRPs except the reference TRP do not need to be compensated for synchronization; note that the meanings of the above number values 00, 01, and 10 are interchangeable, and this is just an example. If some TRPs except the reference TRP need to be compensated for synchronization, 1 bit is needed to indicate whether each TRP except the reference TRP needs to be compensated for synchronization; it should also be noted that the above reference TRP can be predefined by the standard, or it can be selected by the user equipment 120 and notified to the network side. Furthermore, if some TRPs other than the reference TRP need to be synchronized and compensated, it is necessary to use 1 bit to indicate whether each TRP other than the reference TRP needs to be synchronized and compensated. There may be two explanations for the TRP that does not indicate the need for synchronization compensation. One explanation is that the TRP without indication of compensation can meet the synchronization requirements for CJT between multiple TRPs relative to the reference TRP by default; the other explanation is that the TRP without indication of compensation does not participate in the collaboration between multiple TRPs; the above two explanations are both considered reasonable in this embodiment.

Solution 3: For scenarios with at least two TRPs, that is, when Ntrp ≥ 2, the selected TRPs can be indicated by a bitmap. If the bit is 1/0, it means that the TRP is selected, otherwise the TRP is not selected. There are also two interpretations for the unselected TRP. One interpretation is that the unselected TRP can, by default, meet the synchronization requirements of CJT with other selected TRPs after synchronization compensation. For this interpretation, the reference TRP can be one of the unselected TRPs or one of the selected TRPs. For example, the standard can be agreed to be any TRP among all TRPs, any TRP among the selected TRPs, or the TRP before the first selected TRP. If the selected TRP is the first TRP, the reference TRP is that TRP.

Another explanation is that unselected TRPs do not participate in the CJT between multiple TRPs. For this explanation, the reference TRP can be any TRP among the selected TRPs or any TRP among the unselected TRPs, such as the first unselected TRP.

In addition, the TRP selection indication information and the TRP status indication information mentioned above, if the CSI information reported by the user equipment 120 is divided into part 1 and part 2, the above information is placed in part 1.

It should be noted that the synchronization compensation mentioned above may refer to at least one of the following compensations: delay compensation, frequency offset compensation, phase compensation, timing offset compensation, etc.; secondly, the above selection of TRP is equivalent to the selection of reference signal RS resources or reference signal RS resource sets. It is assumed here that each TRP corresponds to an RS resource or an RS resource set, and the RS resource or RS resource set can be a CSI-RS resource or a CSI-RS resource set, or a TRS resource or a TRS resource set, or an SRS resource or an SRS resource set.

Solution 4: Use Case 2.1/Use Case 2.2/Use Case 3.2/Use Case 3.3, first select N TRPs from Ntrp TRPs. The selection of N TRPs can be indicated by the network side or selected by the terminal side. For these N TRPs selected, for Use Case 2.1, N bits are used to indicate whether the delay offset or the delay offset plus the delay spread of each TRP relative to the reference TRP is within the specified range or exceeds the specified range. There are two explanations for the Ntrp-N TRPs that are not selected. One explanation is that these TRPs participate in CJT transmission, and it is believed that the synchronization requirements of CJT are met between them and the multiple TRPs after synchronization calibration, or the impact on performance is acceptable; the other explanation is that they do not participate in CJT transmission due to some other reasons; for the above two explanations, it may be necessary to use 1 bit to indicate which state they are in, so that the network side can know which TRPs may participate in CJT later. Similarly, for use case 2.2, it is considered that the selected N TRPs require the terminal to report frequency deviation information, while the unselected Ntrp-N TRPs can have two states. One state is that it exceeds the specified frequency deviation compensation range and does not perform CJT with the N TRPs that report frequency deviation, or it does not exceed the specified frequency deviation compensation range, but due to other factors, it does not perform CJT with the N TRPs that report frequency deviation; the other state is that it does not exceed the specified frequency deviation compensation range, or it is considered that the impact caused by the frequency deviation can be ignored, and participates in CJT with the N TRPs that perform frequency deviation compensation; for the above two states, it may be necessary to use 1 bit to indicate which state it is in, so that the network side can know which TRPs may participate in CJT later. Similarly, for use cases 3.2 and 3.3, it is considered that the selected N TRPs require the terminal to report phase offset information. The unselected Ntrp-N TRPs can have two states. One state is that they exceed the specified phase compensation range and do not perform CJT with the N TRPs that report phase compensation, or they do not exceed the specified phase compensation range, but due to other factors, they do not perform CJT with the N TRPs that report phase compensation. The other state is that they do not exceed the specified phase compensation range, or the impact caused by the phase offset is considered negligible, and they participate in CJT with the N TRPs that perform phase compensation. For the above two states, 1 bit may be required to indicate which state it is in, so that the network side can know which TRPs may participate in CJT later.

For the above-mentioned scheme 4, the reference TRP can be one of the TRPs that are not selected, or one of the selected TRPs. For example, the standard can be agreed to be any TRP among all TRPs, or any TRP among the selected TRPs, or the TRP that participates in the CJT with the previous TRP among the first selected TRP. If the selected TRP is the first TRP, the reference TRP is that TRP; or for use case 1.2, it can be agreed to be the first TRP among the selected TRPs that has no delay offset or the delay compensation plus delay extension does not exceed the specified range.

In addition, the TRP selection indication information and TRP status indication information mentioned above, if the CSI information reported by the terminal is divided into part 1 and part 2, the above information is placed in part 1.

It should be noted that the synchronization compensation mentioned above may refer to at least one of the following compensations: delay compensation, frequency offset compensation, phase compensation, timing offset compensation, etc.; secondly, the above selection of TRP is equivalent to the selection of reference signal RS resources or reference signal RS resource sets. It is assumed here that each TRP corresponds to an RS resource or an RS resource set, and the RS resource or RS resource set can be a CSI-RS resource or a CSI-RS resource set, or a TRS resource or a TRS resource set, or an SRS resource or an SRS resource set.

Furthermore, for the above three use cases, since each use case has at least two sub-use cases, from the perspective of the user device 120, it is uncertain which operation the user device 120 performs. This can be determined in a variety of ways, specifically, at least one of the following ways:

Method 1: The user equipment 120 reports its capabilities. For example, the first sub-case of each use case is used as a basic capability of the user equipment 120, and the other sub-cases are used as capability items of the user equipment 120. If the user equipment 120 supports multiple sub-cases under each use case at the same time, the specific behavior performed by the user equipment 120 can be configured by the base station 110. The base station 110 can instruct the user equipment 120 to adopt a processing method of the sub-case through RRC/DCI/MAC CE. For example, for the scenario of use case 3, since use case 3 contains 3 sub-cases, if the user equipment 120 supports these three sub-cases at the same time when reporting the capability items, the network side will instruct the user When the device 120 reports the type, 2 bits can be used to indicate to the user device 120 which specific sub-use case reporting method is adopted; for use case 1 and use case 2, the network side only needs to use 1 bit to indicate to the user device 120 which specific sub-use case reporting method is adopted; for example, for use case 1, a bit of 1/0 indicates that the reporting method of use case 1.1 is adopted to report the selected TRPs, while a bit of 0/1 indicates that the reporting method of use case 1.2 is adopted; for each use case in which the user device 120 only reports one capability, the network can instruct the user device 120 by default which sub-use case corresponding reporting method is adopted, thereby reducing the overhead of signaling indication.

Method 2: For user equipment 120 that reports multiple capabilities for different use cases, the user equipment 120 can decide on its own which sub-use case reporting method to use. This method greatly increases the flexibility of multiple TRPs in performing CJT, but the user equipment 120 needs to specify in the reported information which sub-use case reporting method to use. For example, for the scenario of use case 3, since use case 3 contains 3 sub-use cases, if the user equipment 120 supports these three sub-use cases at the same time when reporting the capability item, the user equipment 120 needs to inform the network side of its own reporting type when reporting. Specifically, 2 bits can be used to indicate to the user equipment 120 which sub-use case reporting method is used; for use cases 1 and 2, the user equipment 120 only needs to use 1 bit to inform the network of which sub-use case reporting method is used when reporting; for example, for use case 1, a bit of 1/0 indicates that the reporting method of use case 1.1 is used to report the selected TRPs, while a bit of 0/1 indicates that the reporting method of use case 1.2 is used; for each use case in which the user equipment 120 only reports one capability, the user equipment 120 can, by default, inform the network side of which sub-use case corresponding reporting method is used, thereby reducing the overhead of signaling indication.

Method three: The network side can implicitly determine which sub-use case corresponding reporting method is adopted by the user equipment 120 through the content reported by the user equipment 120. For example, the network side can determine which sub-use case corresponding reporting method is adopted by the user equipment 120 through the length of the signal reported by the user equipment 120; this method helps to reduce signaling overhead.

Example 12

In addition, a codebook enhancement scheme is designed for a Multiple Input Multiple Output (MIMO) communication system. The following embodiments support uplink 3Tx codebook design when the existing Sounding Reference Signal (SRS) resources only support 1, 2, 4, and 8 antenna ports. This disclosure mainly designs the scheme from aspects such as the configuration of SRS resources and the indication of the Transmit Precoding Matrix Indicator (TPMI) and the Transmit Rank Indicator (TRI).

Through the solution provided by this disclosure, user equipment 120 can support the uplink 3-transceiver (TRx) channel codebook solution, thereby improving uplink coverage and throughput. At the same time, the solution disclosed in this disclosure optimizes the indication amount of TRI and TPMI, which can reduce the indication overhead of base station 110.

NR systems are designed to provide diverse services to support a variety of businesses. However, the large uplink transmission requirements of some services are limited by the limited coverage and throughput of NR systems. Increasing uplink throughput is a challenge.

In practice, commercial handheld devices, such as current smartphones, are typically limited to using only two transmit chains. Consequently, their uplink throughput is limited. Although the NR specification supports up to four RF channels, various commercial factors, including power amplifier costs and the size limitations of commercial handsets, have made the use of four channels difficult to implement in commercial devices in the near future.

On the other hand, with the successful evolution of hardware, advanced smartphones are now capable of supporting three antenna ports and transmit chain RF channels within the same frequency band. This allows devices to improve uplink throughput by using one more RF channel than with only two. Compared to devices with only two RF channels, devices with three RF channels can achieve significant gains in uplink throughput, up to 50%. This provides a superior user experience for services with heavy uplink traffic.

In a codebook-based uplink transmission solution, the user equipment 120 first sends an SRS signal to the base station 110 to obtain uplink CSI.

The base station 110 performs uplink channel detection according to the SRS signal sent by the user equipment 120, determines the SRS resources corresponding to the uplink transmission, the number of layers of the uplink transmission (the number of layers indicated by TRI) and the precoding matrix (Transmit Precoding Matrix), and further determines the modulation and coding scheme (MCS) level of the uplink transmission according to the precoding matrix and the channel information. Then, the base station 110 notifies the user equipment 120 of the resource allocation of the physical uplink shared channel (PUSCH) and the corresponding MCS, TPMI, rank (number of transmission layers) (the number of layers indicated by TRI) and the corresponding sounding reference signal resource indicator (SRI).

The user equipment 120 modulates and encodes the data according to the MCS sent by the base station 110, and uses the SRI, TPMI and the number of transmission layers (the number of layers indicated by TRI) to determine the precoding matrix and the number of transmission layers used when sending the data, and then precodes the data and sends it to the base station 110.

In a non-codebook uplink transmission scheme, user equipment 120 first measures a downlink reference signal to obtain a candidate uplink precoding matrix, and then precodes the SRS signal transmitted by user equipment 120 based on the candidate precoding matrix. User equipment 120 transmits the SRS signal to base station 110.

The base station 110 performs uplink channel detection based on the SRS signal sent by the user equipment 120, determines the SRS resources corresponding to the uplink transmission and the MCS level for the uplink transmission, and notifies the user equipment 120. The base station 110 indicates the SRS resources through the SRI. The base station 110 sends the SRI and MCS to the user equipment 120.

The user equipment 120 modulates and codes the data according to the MCS sent by the base station 110 , determines the precoding and transmission layer of the data using the SRI, and precodes the data before sending it to the base station 110 .

Unless the higher layer parameter ul-FullPowerTransmission is set to 'fullpowerMode2', when multiple SRS resources are configured in a codebook-based manner via an SRS resource set (SRS-ResourceSet), the user equipment 120 expects all these SRS resources (SRS-Resource) in the SRS-ResourceSet to be configured with the same number of SRS ports (configured via the value of the higher layer parameter nrofSRS-Ports).

One technical issue is that existing SRS resources support 1, 2, 4, or 8 antenna ports, but not 3. The design of a codebook solution for 3 antenna ports requires a technical solution: how to allocate SRS reference signal resources?

Another technical issue is how to enhance the SRI indication and TPMI information based on different SRS resource configurations for the uplink 3-antenna port codebook?

Existing SRS resources support 1/2/4/8 antenna ports, but not 3 antenna ports. When codebook-based uplink transmission is used and the uplink full-power transmission 'FullPowerTransmission' in the RRC is configured as 'full power', 3 antenna ports can be implemented by configuring two 2-antenna-port SRS resources in an SRS resource set. The specific configuration method is to configure at least two 2-antenna-port SRS resources in an SRS resource set, as shown in Figure 9. In Figure 9, three 2-antenna-port SRS resources are configured, where each group of three SRS antenna ports forms a group. In this way, the three 2-port SRS resources can constitute two 3-antenna-port SRS signal transmissions; the above configuration can be indicated through RRC signaling. At the same time, for different SRS resources in the same resource set, each antenna port occupies the same number of symbols, or occupies the same symbols, which helps to ensure that the coverage of all antenna ports is basically consistent.

Based on the above configuration, when the user equipment 120 needs to activate 3Tx codebook transmission, based on the non-correlated codebook information of 3 antenna ports in the prior art, the following steps are mainly performed:

Step 1: The user equipment 120 reports that it supports 3Tx codebook transmission;

Step 2: The base station 110 configures SRS resources for the user equipment 120 through RRC based on the capabilities reported by the user equipment 120. For example, one or two SRS resource sets are configured for the user equipment 120. Each resource set includes one or more SRS antenna port groups, and each antenna port group consists of SRS resources across two antenna ports.

Step 3: The user equipment 120 sends an uplink SRS signal based on the SRS resource configuration sent by the base station 110;

Step 4: The base station 110 determines information such as SRI, TPMI, and MCS level based on the measured SRS signal result, and indicates it to the user equipment 120 through DCI. In the DCI information, when the uplink full power transmission 'FullPowerTransmission' is not configured, or is configured as 'fullpower', and the transmission precoding is not effective, the maximum rank is 3, and the codebook type is "non-coherent codebook", TPMI is indicated by 3 bits. The specific meaning is shown in the following table, and the meaning of the corresponding bit indication is shown in Table 1.

Table 1: Precoding information and number of layers for 3 antenna ports

The number of SRI indication bits is |log ₂ (N _SRS-group )|, where N _SRS-group is the number of SRS antenna port groups configured in the SRS resource set.

Step 5: The user equipment 120 modulates and encodes the data according to the MCS sent by the base station 110, and uses the SRI, TPMI and the number of transmission layers to determine the precoding matrix and the number of transmission layers used when sending the data, and then precodes the data and sends it to the base station 110.

It should be noted that the above embodiments may be implemented independently or in combination with each other.

Described herein is a method for measuring and reporting channel state information (CSI), which is applicable, for example, to communications between a UE and a base station 110. However, these inventive concepts, methods, apparatuses, devices, computer-readable storage media, chips, and computer program products are not limited to 5G communications and can also be extended to other communication scenarios, such as 6G communications, to achieve the same technical benefits and effects.

In these scalable communication scenarios, a communication device can be a user equipment (UE), a base station (such as a gNB, eNodeB, transmission reception point (TRP), a next-generation communication NodeB, or a Wi-Fi access point), or an entity such as a network element. A user equipment (UE) refers to a device used for communication at the user end, such as a mobile phone. It can also be called a user device, mobile station, or mobile user equipment. A UE can be a variety of devices, including but not limited to mobile phones, tablets, virtual reality (VR) devices, augmented reality (AR) devices, wireless user equipment for industrial control, wireless user equipment for autonomous driving, wireless user equipment for telemedicine, wireless user equipment for smart grids, wireless user equipment for environmental monitoring, wireless user equipment for smart cities, and wireless user equipment for smart homes.

Furthermore, UEs and base stations can be deployed in different environments, including but not limited to indoors, outdoors, as handheld devices, in vehicles, or even on water, in the air, on airplanes, drones, or satellites.

Therefore, although this document describes methods and devices for reporting channel state information (CSI), the inventive concepts and technologies contained therein can be extended to other communication scenarios and are expected to achieve the same technical benefits and effects. It is easy to understand that these inventive concepts have broad applicability and scalability, whether in communications between different types of base stations and user equipment, or in different deployment environments.

It should be noted that the above steps are merely examples and do not limit the scope of the present disclosure. Various modifications and variations can be made to the steps without departing from the spirit and scope of the present disclosure.

The order of the described steps (signaling/boxes) is not intended to be construed as a limitation, and any number of the described steps (signaling/boxes) may be skipped or combined in any order to implement a method or an alternative method.

The present disclosure describes an example of communication between user equipment and network element components in a network architecture in the above embodiments, which is mainly for illustrative purposes and not restrictive.

The order of the steps (signaling/boxes) described is not intended to be interpreted as limiting, and any number of the steps (signaling/boxes) described can be skipped or combined in any order to implement a method or alternative method. Typically, any of the components, modules, methods, and operations described herein can be implemented using software, firmware, hardware (e.g., fixed logic circuitry), manual processing, or any combination thereof. Some operations of the example methods can be described in the general context of executable instructions stored on a computer-readable memory locally and/or remotely on a computer processing system, and implementation methods can include software applications, programs, functions, and the like. Alternatively or in addition, any function described herein can be performed, at least in part, by one or more hardware logic components, such as, but not limited to, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), an application specific standard product (ASSP), a system on a chip (SoC), a complex programmable logic device (CPLD), and the like.

In addition, the signaling described in the embodiments of the present disclosure can be implemented in any manner known in the art. For example, the signaling can be explicit and/or implicit. In addition, the steps (signaling/frames) shown are for illustrative purposes only and are not intended to limit the present application.

FIG10 is a schematic structural diagram of a wireless communication device 900 provided by the present disclosure. The wireless communication device includes: a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, and perform the following operations:

Receive first indication information and second indication information, wherein the first indication information indicates selected antenna ports corresponding to a number of channel state information reference signal CSI-RS resources or the number of selected antenna ports corresponding to a number of CSI-RS resources, and the total number of antenna ports corresponding to the number of CSI-RS resources is greater than a predefined threshold; the second indication information indicates To indicate supported codebook parameters or codebook parameter combinations;

Determining an antenna port to be selected based on the first indication information and/or predefined constraints;

Based on the first indication information and/or the predefined constraint and the second indication information, CSI is calculated and reported.

or

receiving channel state information reference signal (CSI-RS) resource configuration information for channel measurement and/or interference measurement, wherein the CSI-RS resource configuration information includes at least one CSI-RS resource set, the at least one CSI-RS resource set includes multiple CSI-RS resource groups, and the total number of antenna ports corresponding to each CSI-RS resource group is greater than a first predefined threshold; two consecutive CSI-RS resources are located in the same or adjacent time slots; and all CSI-RS resources are triggered based on the same trigger instance;

Based on the codebook parameter information or the codebook parameter combination information and the CSI-RS resource configuration information, channel state information CSI is calculated and reported.

or

receiving channel state information reference signal CSI-RS resource configuration information for channel measurement; wherein the CSI-RS resources corresponding to the CSI-RS resource configuration information are divided into a plurality of CSI-RS resource groups;

Based on the CSI-RS resource configuration information, at least one channel state information CSI reporting instance is reported, wherein one CSI reporting instance corresponds to one CSI-RS resource group, and a total number of antenna ports corresponding to the multiple CSI-RS resources is greater than a predefined threshold.

or

Sending first indication information and second indication information, wherein the first indication information indicates selected antenna ports corresponding to a number of channel state information reference signal (CSI-RS) resources or the number of selected antenna ports corresponding to a number of CSI-RS resources, and the total number of antenna ports corresponding to the number of CSI-RS resources is greater than a predefined threshold; and the second indication information is used to indicate supported codebook parameters or codebook parameter combinations;

The receiving terminal feeds back channel state information CSI, recovers precoding information according to the received CSI, and sends data or control information based on the precoding information.

or

Sending channel state information reference signal (CSI-RS) resource configuration information for channel measurement and/or interference measurement, wherein the CSI-RS resource configuration information includes at least one CSI-RS resource set, the at least one CSI-RS resource set includes multiple CSI-RS resource groups, and the total number of antenna ports corresponding to each CSI-RS resource group is greater than a predefined threshold; two consecutive CSI-RS resources are located in the same or adjacent time slots; all CSI-RS resources are triggered based on the same trigger instance; and the predefined threshold is 32;

The receiving terminal feeds back channel state information CSI, recovers precoding information according to the received CSI, and sends data or control information based on the precoding information.

or

Sending channel state information reference signal CSI-RS resource configuration information for channel measurement; wherein the CSI-RS resources corresponding to the CSI-RS resource configuration information are divided into multiple CSI-RS resource groups;

At least one channel state information (CSI) reporting instance is received, wherein one CSI reporting instance corresponds to one CSI-RS resource group, and a total number of antenna ports corresponding to the plurality of CSI-RS resources is greater than a predefined threshold.

The wireless communication device may be a user device, a base station, or a network element. The wireless communication device 900 shown in FIG10 includes a processor 910. The processor 910 may call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG10 , the wireless communication device 900 may further include a memory 920. The processor 910 may call and execute a computer program from the memory 920 to implement the method in the embodiment of the present application. The memory 920 may be a separate device independent of the processor 910 or may be integrated into the processor 910.

Optionally, as shown in FIG10 , the wireless communication device 900 may further include a transceiver 930 , and the processor 910 may control the transceiver 930 . The transceiver 930 communicates with other devices. Specifically, it can send information or data to other devices or receive information or data sent by other devices. The transceiver 930 may include a transmitter and a receiver. The transceiver 930 may further include an antenna, and the number of antennas may be one or more.

Optionally, the wireless communication device 900 may specifically be a base station in an embodiment of the present application, and the wireless communication device 900 may implement the corresponding processes implemented by the base station in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

Optionally, the wireless communication device 900 may specifically be a mobile user device/user device in an embodiment of the present application, and the wireless communication device 900 may implement the corresponding processes implemented by the mobile user device/user device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

Optionally, the wireless communication device 900 may specifically be a network element in an embodiment of the present application, and the wireless communication device 900 may implement the corresponding processes implemented by the network element in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

According to an example embodiment, a chip is provided, comprising: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes a method according to any one of the above embodiments, examples, or exemplary embodiments.

According to an example embodiment, there is provided a computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute a method according to any one of the above-mentioned embodiments, examples, or exemplary embodiments.

According to an example embodiment, a computer program product is provided, comprising a computer program/instruction, which, when executed by a processor (e.g., by the processor or an apparatus, device, computer or machine including the processor), implements a method according to any one of the above-mentioned embodiments, examples, or example embodiments.

The embodiments of the present disclosure are a combination of techniques/processes that may be employed in 3GPP specifications to create a final product.

While the present disclosure has been described in connection with what is considered to be the most practical and preferred embodiment, it is to be understood that the disclosure is not limited to the disclosed embodiment, but is intended to cover various arrangements embodied within the broadest interpretation of the appended claims.

Claims (60)

A method for measuring and reporting channel state information (CSI), executed on a user equipment, comprising: receiving first indication information and second indication information, wherein the first indication information indicates selected antenna ports corresponding to a number of channel state information reference signal (CSI-RS) resources or the number of selected antenna ports corresponding to a number of CSI-RS resources, and the total number of antenna ports corresponding to the number of CSI-RS resources is greater than a predefined threshold; and the second indication information is used to indicate supported codebook parameters or codebook parameter combinations; Determining an antenna port to be selected based on the first indication information and/or predefined constraints; Based on the first indication information and/or the predefined constraint and the second indication information, CSI is calculated and reported. The method according to claim 1, wherein the predefined threshold is 32. The method according to any one of claims 1-2, wherein the first indication information indicates the selected antenna ports corresponding to several channel state information reference signal CSI-RS resources, the antenna ports are indicated in a bitmap manner, and different polarization directions corresponding to all CSI-RS resources share the same bitmap. The method according to any one of claims 1-2, wherein the first indication information indicates the selected antenna ports corresponding to several channel state information reference signal CSI-RS resources, and the antenna ports are indicated in the form of a combination number, and different polarization directions corresponding to all CSI-RS resources share the same combination number. The method according to any one of claims 1-2, wherein the first indication information indicates the number of selected antenna ports corresponding to the plurality of CSI-RS resources, and the predefined constraint includes: constraining the antenna ports, wherein the constraint mode is such that the number of antenna ports corresponding to different polarization directions corresponding to all CSI-RS resources is the same. The method according to any one of claims 3 to 5, wherein the first indication information is indicated by at least one of the following methods: radio resource control RRC, downlink control information DCI, and media access control sublayer control unit MAC CE. The method according to claim 1, wherein when the total number of antenna ports is a first value, the second indication information indicates a codebook parameter or a codebook parameter combination supporting a number M of frequency domain bases of 1. The method according to claim 1, wherein when the total number of antenna ports is a second value, the second indication information indicates that a codebook parameter or a codebook parameter combination with a port selection coefficient of 1 is supported. The method according to claim 1, wherein when the total number of antenna ports is a third value, the second indication information indicates a codebook parameter or a codebook parameter combination supporting a number M of frequency domain bases of 1 and a port selection coefficient of 1. The method according to claim 1, wherein, when M is 2, the second indication information indicates support for a non-zero coefficient selection factor that is smaller than a conventional non-zero coefficient selection factor. The method according to claim 1, wherein when M is 2 and the total number of antenna ports is a fourth value, the second indication information indicates that a codebook parameter or a codebook parameter combination with a port selection coefficient other than 1 is supported. The method according to claim 1, wherein the number of CSI processing unit CPUs occupied by the calculation process of the plurality of CSIs corresponding to the plurality of CSI-RS resources is determined based on the following method: The number of CPUs occupied is determined based on a coefficient X and N, where the coefficient X is taken from a first set, and N represents the number of CSI-RS resources configured for channel measurement. A method for measuring and reporting channel state information (CSI), executed on a user equipment, comprising: receiving channel state information reference signal (CSI-RS) resource configuration information for channel measurement and/or interference measurement, wherein the CSI-RS resource configuration information includes at least one CSI-RS resource set, the at least one CSI-RS resource set includes multiple CSI-RS resource groups, and the total number of antenna ports corresponding to each CSI-RS resource group is greater than a predefined threshold; two consecutive CSI-RS resources are located in the same or adjacent time slots; all CSI-RS resources are triggered based on the same trigger instance; and the predefined threshold is 32; Based on the codebook parameter information or the codebook parameter combination information and the CSI-RS resource configuration information, channel state information CSI is calculated and reported. The method according to claim 13, wherein the CSI-RS resource is used for channel measurement, the CSI-RS resource configuration information includes a CSI-RS resource set, the multiple CSI-RS resources in the CSI-RS resource set are divided into a plurality of CSI-RS resource groups, and the number of antenna ports corresponding to each CSI-RS resource in each CSI-RS resource group is the same. The method according to claim 13, wherein the CSI-RS resource is used for interference measurement, the CSI-RS resource configuration information is channel state information interference measurement CSI-IM resource configuration information, the CSI-IM resource configuration information includes at least one CSI-IM resource set, and at least one CSI-IM resource is configured in each CSI-IM resource set for interference measurement. A method for measuring and reporting channel state information (CSI), executed on a user equipment, comprising: receiving channel state information reference signal CSI-RS resource configuration information for channel measurement; wherein the CSI-RS resources corresponding to the CSI-RS resource configuration information are divided into a plurality of CSI-RS resource groups; Based on the CSI-RS resource configuration information, at least one channel state information CSI reporting instance is reported, wherein one CSI reporting instance corresponds to one CSI-RS resource group, and a total number of antenna ports corresponding to the multiple CSI-RS resources is greater than a predefined threshold. The method according to claim 16, wherein, for each CSI reporting instance, at least one of the following CSI information in the CSI group is constrained: a rank indicator (RI), a precoding matrix indicator (PMI) number of subbands, a CSI-RS resource indicator (CRI) number, and a number of spatial bases. The method according to claim 16, wherein, for each CSI reporting instance, at least one of the following information of the CSI-RS resource configuration information is constrained: the number of CSI-RS resources used for channel measurement and the number of antenna ports for each CSI-RS resource. The method according to claim 16, wherein, for each CSI reporting instance, at least one of the following information of the CSI in the CSI group is constrained: RI, the number of CRIs, and the calculation spatial domain beam of the CSI corresponding to each CRI. The method according to claim 16, wherein, for each CSI reporting instance, at least one of the following information of the CSI-RS resource configuration information is constrained: the number of CSI-RS resources used for channel measurement and the number of antenna ports for each CSI-RS resource. The method according to claim 16, wherein the predefined threshold is 32, and the number of CSI-RS resources is used for channel measurement. The method according to claim 16, wherein the configuration manner of the CSI-RS resource configuration information includes at least one of the following: several CSI-RS resources are located in the same CSI-RS measurement resource set and several channel state information reference signal CSI-RS resources are located in multiple CSI-RS measurement resource sets. The method according to claim 22, wherein the multiple CSI-RS resources are located in the same CSI-RS measurement resource set, and the multiple CSI-RS resources in the CSI-RS measurement resource set are divided into several CSI-RS resource groups. The method according to claim 16, wherein the CSI is reported in a semi-continuous manner, the CSI is carried in a physical uplink control channel PUCCH, and the method further comprises simultaneously activating CSI reports corresponding to multiple CSI-RS resource groups through a media access control sublayer control unit MAC CE. The method according to claim 16, wherein the CSI is reported in a semi-continuous reporting or aperiodic reporting manner, and the CSI is carried in a physical uplink shared channel (PUSCH). The method further includes activating multiple CSI-RS resource groups or multiple CSI-RS resource sets at the same time through downlink control information (DCI). The method according to claim 16, wherein each CSI is determined based on a different codebook parameter or a combination of codebook parameters. The method according to claim 16, wherein each CSI is based on different codebook parameters or codebook parameter combinations, wherein the codebook parameter combination includes: a spatial basis, a frequency domain basis, and a non-zero coefficient, and the CSI is determined based on a selection factor of different numbers of spatial basis, the same number of frequency domain basis, and the same non-zero coefficient. The method according to claim 16, wherein, for each CSI reporting instance, the number of CSI processing unit CPUs occupied by the calculation process of each CSI reporting instance, the number of CPUs occupied by the calculation process of each CSI reporting instance Numbers do not add up. According to the method of claim 16 or 28, the number of CPUs occupied by the multiple CSIs corresponding to the multiple CRIs is determined based on at least one of the following methods: The CSI-RS resource configuration information includes _Ks CSI-RS resources for channel measurement, and the number of CPUs occupied is determined based on _Ks ; At least one CSI reporting instance includes N CRIs; the number N is indicated by the base station or determined by the user equipment; the number of CPUs occupied is determined based on N; The CSI-RS resource configuration information includes _Ks CSI-RS resources for channel measurement, when _Ks is less than or equal to a predefined threshold, the number of occupied CPUs is determined based on _Ks ; when _Ks is greater than the predefined threshold, the number of occupied CPUs is determined based on _X1 and _Ks , wherein _X1 is taken from the first set; The CSI-RS resource configuration information includes _Ks CSI-RS resources for channel measurement, and at least one CSI reporting instance includes N CRIs. When the _Ks is less than or equal to a predefined threshold, the number of occupied CPUs is determined based on N; when the _Ks is greater than the predefined threshold, the number of occupied CPUs is determined based on _X1 and N, where _X1 is taken from the first set. A wireless communication device, wherein the wireless communication device comprises: a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 29. A method for measuring and reporting channel state information (CSI), executed on a user equipment, comprising: receiving first indication information and second indication information, wherein the first indication information indicates selected antenna ports corresponding to a number of channel state information reference signal (CSI-RS) resources or the number of selected antenna ports corresponding to a number of CSI-RS resources, and the total number of antenna ports corresponding to the number of CSI-RS resources is greater than a predefined threshold; and the second indication information is used to indicate supported codebook parameters or codebook parameter combinations; Determining an antenna port to be selected based on the first indication information and/or predefined constraints; Based on the first indication information and/or the predefined constraint and the second indication information, CSI is calculated and reported. The method according to claim 31, wherein the predefined threshold is 32. The method according to any one of claims 31-32, wherein the first indication information indicates the selected antenna ports corresponding to several channel state information reference signal CSI-RS resources, and the antenna ports are indicated in a bitmap manner, and different polarization directions corresponding to all CSI-RS resources share the same bitmap. The method according to any one of claims 31-32, wherein the first indication information indicates the selected antenna ports corresponding to several channel state information reference signal CSI-RS resources, and the antenna ports are indicated in the form of a combination number, and different polarization directions corresponding to all CSI-RS resources share the same combination number. The method according to any one of claims 31-32, wherein the first indication information indicates the number of selected antenna ports corresponding to a number of CSI-RS resources, and the predefined constraints include: constraining the antenna ports, and the constraint method is that the number of antenna ports corresponding to different polarization directions corresponding to all CSI-RS resources is the same. The method according to any one of claims 33-35, wherein the first indication information is indicated by at least one of the following methods: radio resource control RRC, downlink control information DCI, and media access control sublayer control unit MAC CE. The method according to claim 31, wherein when the total number of antenna ports is a first value, the second indication information indicates a codebook parameter or a codebook parameter combination supporting a number M of frequency domain bases of 1. The method according to claim 31, wherein when the total number of antenna ports is a second value, the second indication information indicates that a codebook parameter or a codebook parameter combination with a port selection coefficient of 1 is supported. The method according to claim 31, wherein when the total number of antenna ports is a third value, the second indication information indicates a codebook parameter or a codebook parameter combination supporting a number M of frequency domain bases of 1 and a port selection coefficient of 1. The method according to claim 31, wherein when M is 2, the second indication information indicates the support ratio The traditional non-zero coefficient selection factor has a smaller non-zero coefficient selection factor. The method according to claim 31, wherein, when M is 2 and the total number of antenna ports is a fourth value, the second indication information indicates that a codebook parameter or a codebook parameter combination with a port selection coefficient other than 1 is supported. The method according to claim 31, wherein the number of CSI processing unit CPUs occupied by the calculation process of the plurality of CSIs corresponding to the plurality of CSI-RS resources is determined based on the following method: The number of CPUs occupied is determined based on a coefficient X and N, where the coefficient X is taken from a first set, and N represents the number of CSI-RS resources configured for channel measurement. A method for measuring and reporting channel state information (CSI), executed on a user equipment, comprising: receiving channel state information reference signal (CSI-RS) resource configuration information for channel measurement and/or interference measurement, wherein the CSI-RS resource configuration information includes at least one CSI-RS resource set, the at least one CSI-RS resource set includes multiple CSI-RS resource groups, and the total number of antenna ports corresponding to each CSI-RS resource group is greater than a predefined threshold; two consecutive CSI-RS resources are located in the same or adjacent time slots; all CSI-RS resources are triggered based on the same trigger instance; and the predefined threshold is 32; Based on the codebook parameter information or the codebook parameter combination information and the CSI-RS resource configuration information, channel state information CSI is calculated and reported. The method according to claim 43, wherein the CSI-RS resource is used for channel measurement, the CSI-RS resource configuration information includes a CSI-RS resource set, the multiple CSI-RS resources in the CSI-RS resource set are divided into several CSI-RS resource groups, and the number of antenna ports corresponding to each CSI-RS resource in each CSI-RS resource group is the same. The method according to claim 43, wherein the CSI-RS resource is used for interference measurement, the CSI-RS resource configuration information is channel state information interference measurement CSI-IM resource configuration information, the CSI-IM resource configuration information includes at least one CSI-IM resource set, and at least one CSI-IM resource is configured in each CSI-IM resource set for interference measurement. A method for measuring and reporting channel state information (CSI), executed on a user equipment, comprising: receiving channel state information reference signal CSI-RS resource configuration information for channel measurement; wherein the CSI-RS resources corresponding to the CSI-RS resource configuration information are divided into a plurality of CSI-RS resource groups; Based on the CSI-RS resource configuration information, at least one channel state information CSI reporting instance is reported, wherein one CSI reporting instance corresponds to one CSI-RS resource group, and a total number of antenna ports corresponding to the multiple CSI-RS resources is greater than a predefined threshold. The method according to claim 46, wherein, for each CSI reporting instance, at least one of the following information of the CSI in the CSI group is constrained: rank indication RI, number of precoding matrix indication PMI subbands, number of CSI-RS resource indication CRI and number of spatial basis. The method according to claim 46, wherein, for each CSI reporting instance, at least one of the following information of the CSI-RS resource configuration information is constrained: the number of CSI-RS resources used for channel measurement and the number of antenna ports for each CSI-RS resource. The method according to claim 46, wherein, for each CSI reporting instance, at least one of the following information of the CSI in the CSI group is constrained: RI, the number of CRIs, and the calculation spatial domain beam of the CSI corresponding to each CRI. The method according to claim 46, wherein, for each CSI reporting instance, at least one of the following information of the CSI-RS resource configuration information is constrained: the number of CSI-RS resources used for channel measurement and the number of antenna ports for each CSI-RS resource. The method according to claim 46, wherein the predefined threshold is 32, and the number of CSI-RS resources is used for channel measurement. The method according to claim 46, wherein the configuration manner of the CSI-RS resource configuration information includes at least one of the following: several CSI-RS resources are located in the same CSI-RS measurement resource set and several channel state information reference signal CSI-RS resources are located in multiple CSI-RS measurement resource sets. The method according to claim 52, wherein several CSI-RS resources are located in the same CSI-RS measurement resource set, and the multiple CSI-RS resources in the CSI-RS measurement resource set are divided into several CSI-RS resource groups. The method according to claim 46, wherein the CSI is reported in a semi-continuous manner, the CSI is carried in a physical uplink control channel PUCCH, and the method further comprises simultaneously activating CSI reports corresponding to multiple CSI-RS resource groups through a media access control sublayer control unit MAC CE. The method according to claim 46, wherein the CSI is reported in a semi-continuous reporting or non-periodic reporting manner, and the CSI is carried in a physical uplink shared channel PUSCH, and the method further includes activating multiple CSI-RS resource groups or multiple CSI-RS resource sets at the same time through downlink control information DCI. The method of claim 46, wherein each CSI is determined based on a different codebook parameter or a combination of codebook parameters. The method according to claim 46, wherein each CSI is based on different codebook parameters or codebook parameter combinations, wherein the codebook parameter combination includes: a spatial basis, a frequency domain basis, and a non-zero coefficient, and the CSI is determined based on a selection factor of different numbers of spatial basis, the same number of frequency domain basis, and the same non-zero coefficient. The method according to claim 46, wherein, for each CSI reporting instance, the number of CPUs of the CSI processing unit occupied by the calculation process of each CSI reporting instance, and the number of CPUs occupied by the calculation processes of the respective CSI reporting instances do not add up. According to the method of claim 46 or 58, the number of CPUs occupied by the multiple CSIs corresponding to the multiple CRIs is determined based on at least one of the following methods: The CSI-RS resource configuration information includes _Ks CSI-RS resources for channel measurement, and the number of CPUs occupied is determined based on _Ks ; At least one CSI reporting instance includes N CRIs; the number N is indicated by the base station or determined by the user equipment; the number of CPUs occupied is determined based on N; The CSI-RS resource configuration information includes _Ks CSI-RS resources for channel measurement, when _Ks is less than or equal to a predefined threshold, the number of occupied CPUs is determined based on _Ks ; when _Ks is greater than the predefined threshold, the number of occupied CPUs is determined based on _X1 and _Ks , wherein _X1 is taken from the first set; The CSI-RS resource configuration information includes _Ks CSI-RS resources for channel measurement, and at least one CSI reporting instance includes N CRIs. When the _Ks is less than or equal to a predefined threshold, the number of occupied CPUs is determined based on N; when the _Ks is greater than the predefined threshold, the number of occupied CPUs is determined based on _X1 and N, where _X1 is taken from the first set. A wireless communication device, wherein the wireless communication device comprises: a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method as described in any one of claims 31 to 59.