WO2025031238A1 - Method for reporting channel state information, method for acquiring channel state information, and terminal and network-side device - Google Patents

Abstract

Disclosed in the present application are a method for reporting channel state information, a method for acquiring channel state information, and a terminal and a network-side device. The method for reporting channel state information comprises: a terminal determining a channel state information (CSI) report; and the terminal reporting the CSI report to a network-side device, wherein the CSI report is associated with at least one of the following: at least one piece of first-type precoding matrix indicator (PMI) information, and at least one piece of second-type PMI information, wherein the second-type PMI information is obtained on the basis of the first-type PMI information.

Description

Channel state information reporting method, acquisition method, terminal and network side device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese patent application No. 202310981922.4 filed in China on August 4, 2023, the entire contents of which are incorporated herein by reference.

Technical Field

The present application belongs to the field of communication technology, and specifically relates to a method for reporting and obtaining channel state information, a terminal, and a network-side device.

Background Art

The Channel State Information (CSI) architecture can be divided into downlink CSI and uplink CSI, where downlink CSI includes a downlink physical channel for data transmission and a downlink reference signal for channel estimation to obtain downlink CSI; uplink CSI includes an uplink physical channel for data transmission and an uplink reference signal for channel estimation to obtain uplink CSI. In the 5th Generation (5G) communication system, CSI is mainly used in Adaptive Beamforming technology and Multiple Input Multiple Output (MIMO) technology to improve wireless transmission bandwidth and reliability.

Usually, the terminal can determine the CSI report through high-level signaling or default rules. For example, the network-side device associates a reference signal resource configuration (CSI-ResourceConfig) for channel measurement, a reference signal resource configuration for CSI interference measurement (CSI Interference Measurement, CSI-IM), or a reference signal resource configuration for a non-zero power CSI reference signal (Non-Zero Power CSI-RS) resource for each CSI report configuration (CSI-ReportConfig). The terminal obtains the corresponding channel information by measuring the reference resources associated with these resource configurations, and thus obtains the corresponding CSI information according to the codebook configuration information associated with the CSI report configuration and the CSI report content, and provides feedback based on the uplink channel.

However, with the related CSI architecture, the CSI report fed back by the terminal cannot be associated with other purposes except those defined by the standard, or the CSI report fed back by the terminal cannot be associated with PMI information for multiple purposes, which makes it impossible for the network side device to obtain CSI reports associated with PMI information for other purposes or multiple purposes.

Summary of the invention

The embodiments of the present application provide a channel state information reporting method, acquisition method, terminal and network side device, which can solve the problem that the network side device cannot obtain CSI reports associated with PMI information for other purposes or multiple purposes.

In a first aspect, a method for reporting channel state information is provided, the method comprising: a terminal determines a CSI report; the terminal reports the CSI report to a network side device; wherein the CSI report is associated with at least one of the following: at least one first type of precoding matrix indication PMI information; at least one second type of PMI information; the second type of PMI information is obtained based on the first type of PMI information.

In a second aspect, a method for acquiring channel state information is provided, the method comprising: a network side device receives a CSI report reported by a terminal, wherein the CSI report is associated with at least one of the following: at least one first type of precoding matrix indication PMI information; at least one second type of PMI information; the second type of PMI information is obtained based on the first type of PMI information.

In a third aspect, a channel state information reporting device is provided, which includes: a determination module, used to determine a channel state information CSI report; a reporting module, used to report the CSI report to a network side device; wherein the CSI report is associated with at least one of the following: at least one first type of precoding matrix indication PMI information; the second type of PMI information is obtained based on the first type of PMI information.

In a fourth aspect, a device for acquiring channel state information is provided, the device comprising: a receiving module, used to receive a CSI report reported by a terminal, wherein the CSI report is associated with at least one of the following: at least one first type of precoding matrix indication PMI information; at least one second type of PMI information; the second type of PMI information is obtained based on the first type of PMI information; an acquisition module, used to acquire at least one of the following based on the CSI report: at least one first type of precoding matrix indication PMI information; at least one second type of PMI information.

In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

In a sixth aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

In the seventh aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

In an eighth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

In the ninth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

In the tenth aspect, a computer program/program product is provided, wherein the computer program/program product is stored in a storage medium, and the program/program product is executed by at least one processor to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

In an embodiment of the present application, the terminal determines a channel state information CSI report and reports the CSI report to a network side device, wherein the CSI report is associated with at least one of the following: at least one first type of precoding matrix indication PMI information; at least one second type of PMI information; the second type of PMI information is obtained based on the first type of PMI information, so that the terminal determines the PMI information with different purposes or PMI information for multiple purposes associated with the CSI report and feeds it back to the network side device, so that the network side device can obtain the PMI information with different purposes or multiple purposes associated in the CSI report, thereby improving the flexibility of network scheduling.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a block diagram of a wireless communication system to which an embodiment of the present application can be applied;

FIG2 is a schematic diagram showing a flow chart of a method for reporting channel state information provided in an embodiment of the present application;

FIG3 is a schematic diagram showing a flow chart of a method for acquiring channel state information provided in an embodiment of the present application;

FIG4 is a schematic diagram showing a flow chart of another method for acquiring channel state information provided in an embodiment of the present application;

FIG5 is a schematic diagram showing the structure of a channel state information reporting device provided in an embodiment of the present application;

FIG6 is a schematic diagram showing the structure of a channel state information reporting device provided in an embodiment of the present application;

FIG7 is a schematic diagram showing the structure of a communication device provided in an embodiment of the present application;

FIG8 is a schematic diagram showing a hardware structure of a terminal provided in an embodiment of the present application;

FIG9 shows a schematic diagram of the hardware structure of a network-side device provided in an embodiment of the present application.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

The terms "first", "second", etc. of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character "/" generally indicates that the objects associated with each other are in an "or" relationship.

The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE)/LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned systems and radio technologies as well as other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terms are used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as ^6th Generation (6G) communication systems.

FIG1 shows a block diagram of a wireless communication system applicable to the embodiment of the present application. The wireless communication system includes a terminal 11 and a network side device 12 . Among them, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), a flight vehicle (flight vehicle), a vehicle user equipment (VUE), a shipborne equipment, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (Personal Computer, PC), a teller machine or a self-service machine and other terminal side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AS) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc. Among them, the base station can be called Node B (Node B, NB), Evolved Node B (Evolved Node B, eNB), the next generation Node B (the next generation Node B, gNB), New Radio Node B (New Radio Node B, NR Node B), access point, Relay Base Station (Relay Base Station, RBS), Serving Base Station (Serving Base Station, SBS), Base Transceiver Station (Base Transceiver Station, BTS), radio base station, radio transceiver, base The base station is not limited to specific technical terms as long as the same technical effect is achieved. It should be noted that in the embodiments of the present application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

The core network equipment may include but is not limited to at least one of the following: core network nodes, core network functions, mobility management entity (Mobility Management Entity, MME), access mobility management function (Access and Mobility Management Function, AMF), session management function (Session Management Function, SMF), user plane function (User Plane Function, UPF), policy control function (Policy Control Function, PCF), policy and charging rules function unit (Policy and Charging Rules Function, PCRF), edge application service discovery function (Edge Application Server Discovery ... user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user ion, EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (or L-NEF), Binding Support Function (BSF), Application Function (AF), etc. It should be noted that in the embodiments of the present application, only the core network device in the NR system is taken as an example for introduction, and the specific type of the core network device is not limited.

In combination with the accompanying drawings, the reporting method, acquisition method, terminal and network side device of the channel state information provided by the embodiments of the present application are described in detail through some embodiments and their application scenarios.

In step 202, the terminal determines a channel state information (CSI) report.

Step 204: The terminal reports the CSI report to a network-side device.

In an embodiment of the present application, the CSI report is associated with at least one of the following:

(1) at least one first type of precoding matrix indicator (PMI) information;

(2) at least one second type of PMI information;

For example, the CSI report may be associated with at least one first type of PMI information, for example, at least one first type of precoding matrix indication PMI information. Alternatively, the CSI report may be associated with at least one first type of PMI information and at least one second type of PMI information, for example, the CSI report includes at least one first type of precoding matrix indication PMI information and at least one second type of PMI information, or the CSI report includes at least one second type of precoding matrix indication PMI information, in which case the at least one first type of PMI information associated with the CSI report is obtained based on other CSI reports.

In the embodiment of the present application, optionally, the first-category PMI information and the second-category PMI information have different uses.

The differences in the uses of the first and second types of PMI information include but are not limited to the following:

(1) The first type of PMI information and the second type of PMI information have different modules or nodes in the communication processing flow;

(2) The first type of PMI information is used for analog beamforming, and the second type of PMI information is used for digital beamforming;

(3) The first type of PMI information acts on analog devices, and the second type of PMI information acts on digital baseband signal processing;

(4) The first type of PMI information is used for analog domain signal processing, and the second type of PMI information is used for digital domain signal processing.

(5) The baseband signal is first processed by the second type of PMI information, then processed by the first type of PMI information, and finally radiated through the antenna;

(6) The baseband signal is first processed jointly or mixedly by the second-type PMI information and the first-type PMI information, and finally radiated through the antenna;

(7) The first type of PMI information and the second type of PMI information are associated with different codebooks or different codebook types;

(8) The first type of PMI information maps data symbols or reference signals output by multiple TRX chains to multiple antennas or antenna subarrays or virtual antenna subarrays for transmission; the second type of PMI information maps at least one transport layer to multiple TRX chain outputs.

For example, both the first type of PMI information and the second type of PMI information can be used for beamforming or precoding, and the first type of PMI information and the second type of PMI information respectively correspond to different modules in the beamforming or precoding technology, such as analog beamforming and digital beamforming of hybrid beamforming technology. The first type of PMI information can be used to instruct the network side device to perform analog beamforming or adjust the analog beam, and the second type of PMI information can be used to instruct the network side device to perform digital beamforming or digital beam precoding.

In an embodiment of the present application, the second type of PMI information can be obtained based on the first type of PMI information. For example, the terminal estimates or acquires a channel based on a reference signal, further acquires the first type of PMI information based on the estimated or acquired channel, further, the terminal acquires an equivalent channel based on the estimated or acquired channel and the acquired first type of PMI information, and the terminal acquires the second type of PMI information based on the equivalent channel.

In an embodiment of the present application, the terminal determines a channel state information CSI report and reports the CSI report to a network side device, wherein the CSI report is associated with at least one of the following: at least one first type of precoding matrix indication PMI information; at least one second type of PMI information; the second type of PMI information is obtained based on the first type of PMI information, so that the terminal determines the PMI information with different purposes or PMI information for multiple purposes associated with the CSI report and feeds it back to the network side device, so that the network side device can obtain the PMI information with different purposes or multiple purposes associated in the CSI report, thereby improving the flexibility of network scheduling.

In the embodiment of the present application, the first-category PMI information may include one of the following:

(1) A first-category PMI; in this implementation, the CSI report is associated with at least one first-category PMI. Optionally, in one implementation, a first-category PMI indicates that data symbols or reference signals output by multiple TRX chains are mapped to multiple antennas or antenna subarrays or virtual antenna subarrays for transmission.

[Corrected 12.08.2024 in accordance with Rule 26]
(2) A first-class PMI part, wherein the first-class PMI is composed of at least one first-class PMI part. In this implementation, the CSI report is associated with at least one first-class PMI part, and a first-class PMI is composed of at least one first-class PMI part. The network-side device can obtain the first PMI according to at least one first-class PMI part constituting a first PMI. A first-class PMI is usually associated with a matrix or a vector. Therefore, a first-class PMI can be divided into multiple sub-matrices, and a first-class PMI part is a sub-matrix of a first-class PMI. For example, assuming the codebook structure is The first type of PMI may include two first type of PMI parts, namely W _APMI1 and W _APMI2 , that is, one first type of PMI is composed of W _APMI1 and W _APMI2 . Optionally, in one implementation, one first type of PMI part indicates that a data symbol or reference signal output by a TRX chain is mapped to at least one antenna or antenna subarray or virtual antenna subarray for transmission.

[Corrected 12.08.2024 in accordance with Rule 26]
[REDACTED]

In an embodiment of the present application, the terminal determines a CSI report and reports the CSI report to a network side device, wherein the CSI report is associated with at least one of the following: at least one first type of precoding matrix indication PMI information; at least one second type of PMI information; the first type of PMI information and the second type of PMI information have different uses, for example, the first type of PMI information is used for analog beamforming, and the second type of PMI information is used for digital beamforming, so that the terminal determines the PMI information with different uses or multiple uses associated with the CSI report and feeds it back to the network side device, so that the network side device can obtain the PMI information with different uses or multiple uses associated in the CSI report, such as analog beam information, to improve the flexibility of network scheduling.

In one implementation, before the terminal determines the CSI report in step 202, the method may further include: the terminal determines one of the following according to the high-layer signaling:

(1) the CSI report is associated with the first type of PMI information;

(2) The CSI report associates the first-category PMI information with the second-category PMI information.

In an embodiment of the present application, before the terminal determines the CSI report, the terminal can determine that the CSI report is associated with at least one first-category PMI information or determine that the CSI report is associated with at least one first-category PMI information and at least one second-category PMI information based on high-level signaling indicated by the network side device, so as to enable the terminal to determine the content of the CSI report and report it to the network side device.

[Corrected 12.08.2024 in accordance with Rule 26]
In one implementation, in the process of determining the CSI report in step 202, the terminal may determine the amount of the first type of PMI information associated with the CSI report by network signaling, or may determine the amount of the first type of PMI information associated with the CSI report according to its own policy, and indicate the amount of the first type of PMI information associated with the CSI report to the network side device.

[Corrected 12.08.2024 in accordance with Rule 26]
For example, assuming the codebook structure is The number of the first type of PMI indicates the number of W _APMI1 and/or W _APMI2 . Optionally, W _APMI1 and W _APMI2 are respectively associated with two polarization directions. The terminal can determine the number of W _APMI1 and/or W _APMI2 according to network signaling. The terminal can also determine the number of the first type of PMI fed back by itself and indicate it to the network side device. For example, the terminal indicates to the network the number of W _APMI1 and/or W _APMI2 fed back by the terminal. Among them, when W _APMI1 and W _APMI2 are the same, the terminal only needs to indicate the number of W _APMI1 or W _APMI2 to the network side device.

[Corrected 12.08.2024 in accordance with Rule 26]
For another example, in the case where the first-category PMI information includes a first-category PMI part, for the above-mentioned codebook structure, W _APMI1 or W _APMI2 of the first-category PMI can generally be divided into multiple sub-matrices, and each sub-matrix of W _APMI1 or W _APMI2 is a first-category PMI part. Generally, each sub-matrix is associated with a reference signal or multiple reference signals or a partial port of a reference signal or an antenna subarray, which is not limited here. Therefore, the first-category PMI is composed of at least one first-category PMI part. Further, the terminal obtains the number of sub-matrices indicated by the network according to the high-level signaling or reference signal configuration. Further, optionally, the terminal determines the number of first-category PMI parts associated with each sub-matrix according to the network high-level signaling indication. Or, optionally, the terminal indicates to the network the number of first-category PMI parts associated with each sub-matrix fed back by the terminal.

[Corrected 12.08.2024 in accordance with Rule 26]
For example, suppose the network indicates that a first-class PMI The first-category PMI part is W _APMI1-1 or W _APMI1-2 , which is usually a vector. According to the network signaling, the terminal determines that the number of the first-category PMI parts W _APMI1-1 associated with the first diagonal block (submatrix) is N1, and the number of the first-category PMI parts W _APMI1-2 associated with the second diagonal block is N2. Then, the number of first-category PMIs that the terminal can determine is usually N1*N2. Further, optionally, the terminal can select part of the first-category PMI to feed back to the network. Alternatively, the terminal feeds back N1+N2 first-category PMI parts, and the network-side device obtains and uses the corresponding first-category PMI according to the first-category PMI parts.

Alternatively, the terminal feeds back N1 and N2 to the network (not network signaling configuration), indicating that the first diagonal block (submatrix) is associated with N1 first-category PMI parts W _APMI1-1 and the second diagonal block is associated with N2 first-category PMI parts, which is used for the network to obtain the number of first-category PMI parts fed back by the terminal.

In one implementation, the terminal determines the CSI report in step 202, which may further include at least one of the following:

(1) The terminal determines the acquisition range of each of the first-category PMI information according to the first network signaling, wherein the first network signaling is used to indicate the acquisition range of multiple first-category PMI information. For example, the first network signaling indicates one or more values, and the terminal determines the acquisition range according to the one or more values; for another example, the first network signaling indicates one or more bit sequences, and the terminal determines the acquisition range according to the bit sequences.

Optionally, the terminal may select at least one of the first-category PMI information associated with the CSI report within the acquisition range based on the first network signaling, wherein the first indication information of the at least one first-category PMI information is fed back in the CSI report (that is, the first indication information of the at least one first-category PMI information selected by the terminal), and the feedback overhead of the first indication information is determined based on the size of the acquisition range associated with the first network signaling.

[Corrected 12.08.2024 in accordance with Rule 26]
In one embodiment, assuming that a first-class PMI is composed of at least one first-class PMI part, if the CSI report fed back by the terminal is associated with multiple first-class PMIs, or a first-class PMI is composed of more first-class PMI parts, then the terminal needs to feed back more first-class PMI parts to the network side device for the network side device to obtain the first-class PMI. At this time, the feedback overhead and computational complexity of the terminal may be large. In order to reduce the feedback overhead and complexity, it is optional that, for a first-class PMI, the network side device can configure the association relationship between multiple first-class PMI parts fed back by the terminal, and the association relationship is used to limit the acquisition range of multiple first-class PMI parts of a first-class PMI; further, the terminal can feed back some offset values or difference values instead of the indication of part of the first-class PMI part, thereby reducing the feedback overhead and complexity.

[Corrected 12.08.2024 in accordance with Rule 26]
For example, suppose the network side device indicates a first type PMI Among them, the first type of PMI part is W _PPMI1-1 or W _PPMI1-2 , and is usually a vector. The terminal determines, according to the first network signaling, that the beam spacing between the first type of PMI parts associated with W _APMI1-1 and W _APMI1-2 acquired or fed back by the terminal does not exceed a threshold value, and the beam spacing can be a sequence number difference or an angle difference or an index difference, and the threshold value is a threshold value indicated by the network signaling. At this time, when the terminal feeds back W _APMI1 , it only needs to feed back the beam spacing of the first type of PMI part associated with W _PPMI1-1 and the first type of PMI part associated with W _APMI1-2 relative to W _APMI1-1 , thereby reducing the feedback overhead when there are multiple first type PMIs.

(2) The terminal determines, according to a second network signaling, an interval range between multiple pieces of the first-category PMI information, wherein the second network signaling is used to indicate the interval range between multiple pieces of the first-category PMI information.

Optionally, the terminal may select at least one of the first-category PMI information associated with the CSI report based on the second network signaling, wherein, for other first-category PMI information except the reference first-category PMI information among the at least one selected first-category PMI information, the feedback overhead of the associated indication information is determined based on the size of the interval range associated with the second network signaling, and the interval between the other first-category PMI information and the reference first-category PMI information is within the interval range, and second indication information is fed back in the CSI report, the second indication information being used to indicate one of the reference first-category PMI information selected by the terminal and the offset of each first-category PMI information relative to the reference first-category PMI information, and the feedback overhead of the second indication information is determined based on the size of the interval range associated with the second network signaling.

[Corrected 12.08.2024 in accordance with Rule 26]
In one embodiment, assuming that a first-class PMI includes at least one first-class PMI part, if the CSI report fed back by the terminal is associated with multiple first-class PMI parts, the terminal needs to feed back more first-class PMI parts to the network side device for the network side device to obtain the first-class PMI information. At this time, the feedback overhead and computational complexity of the terminal may be large. In order to reduce the feedback overhead and complexity, it is optional that, for multiple first-class PMIs, the network side device can configure the association relationship between the multiple first-class PMI parts fed back by the terminal, and the association relationship is used to limit the interval range of the multiple first-class PMI parts; further, the terminal can feed back some offset values or difference values instead of the indication of some first-class PMI parts, thereby reducing the feedback overhead and complexity.

[Corrected 12.08.2024 in accordance with Rule 26]
For example, suppose the network device indicates a first-class PMI The first-class PMI part is W _APMI1-1 or W _APMI1-2 , which is usually a vector. The terminal determines, based on the second network signaling, that the number of first-class PMI parts associated with the fed-back W _APMI1-1 is N1, where N1 is an integer. At the same time, it is determined that the beam spacing between multiple first-class PMI parts obtained or fed back by the terminal does not exceed a threshold value, and the beam spacing can be a sequence number difference or an angle difference or an index difference, and the threshold value is a threshold value indicated by the network signaling. At this time, the terminal only needs to feed back a reference first-class PMI part and N1-1 first-class PMI parts other than the reference first-class PMI part relative to the reference beam spacing, thereby reducing feedback overhead.

[Corrected 12.08.2024 in accordance with Rule 26]
For another example, suppose the network indicates a first-class PMI The first-class PMI part is W _APMI1-1 or W _APMI1-2 , which is usually a vector. The terminal determines, according to the second network signaling, that the number of first-class PMI parts associated with the fed-back W _APMI1-2 is N2, where N2 is an integer. At the same time, it is determined that the beam spacing between multiple first-class PMI parts obtained or fed back by the terminal does not exceed a threshold value, and the beam spacing can be a sequence number difference or an angle difference or an index difference, and the threshold value is a threshold value indicated by the network signaling. At this time, the terminal only needs to feed back a reference first-class PMI part and N2-1 first-class PMI parts other than the reference first-class PMI part relative to the reference beam spacing, thereby reducing feedback overhead.

[Corrected 12.08.2024 in accordance with Rule 26]
For another example, suppose the network indicates a first-class PMI The first-class PMI part is W _APMI1-1 or W _APMI1-2 , which is usually a vector. According to the second network signaling, the terminal determines that the number of first-class PMI parts associated with the fed-back W _APMI1-1 is N1, and the number of first-class PMI parts associated with the fed-back W _APMI1-2 is N2, where N1 and N2 are integers. Optionally, N1=N2. At the same time, it is determined that the beam spacing between multiple first-class PMI parts obtained or fed back by the terminal does not exceed a threshold value, and the beam spacing can be a sequence number difference or an angle difference or an index difference, and the threshold value is a threshold value indicated by the network signaling. At this time, the terminal only needs to feed back a reference first-class PMI part (associated with W _APMI1-1 or W _APMI1-2 ) and the beam spacing of the first-class PMI part other than the reference first-class PMI part relative to the reference first-class PMI part, thereby reducing feedback overhead.

In another embodiment, if the CSI report fed back by the terminal is associated with multiple first-class PMI information, the feedback overhead and computational complexity of the terminal may be large. In order to reduce the feedback overhead and complexity, optionally, when there are multiple first-class PMIs, the network side device can configure the association relationship between the multiple first-class PMI information fed back by the terminal, and the association relationship is used to limit the interval range between the multiple first-class PMIs. Furthermore, the terminal feeds back some offset values or difference values instead of some first-class PMI indications, thereby reducing feedback overhead and complexity.

For example, the network side device configures multiple reference signals for obtaining multiple first-class PMIs W _APMI , where the first-class PMI is W _APMI , which is usually a vector or a matrix. The terminal determines, based on the second network signaling, that the beam spacing between the multiple first-class PMI information obtained or fed back by the terminal does not exceed a threshold value (i.e., the above-mentioned interval range), and the beam spacing can be a sequence number difference or an angle difference or an index difference, and the threshold value can be a threshold value indicated by the network signaling. At this time, the terminal only needs to feed back a reference W _APMI and the beam spacing of other W _APMIs relative to the reference W _APMI , thereby reducing feedback overhead.

In an embodiment of the present application, the terminal determines the association relationship between multiple first-class PMI information based on network signaling, and limits the acquisition scope of multiple first-class PMI information through the association relationship, wherein the first-class PMI information may include a first-class PMI or a first-class PMI part, and then feeds back the first-class PMI or the first-class PMI part to the network side device, thereby reducing overhead and achieving more flexible control.

In one implementation, the above step 202 of the terminal determining the CSI report may also include:

Step 2021, the terminal determines at least one reference first-category PMI information in the first-category PMI information;

Step 2023: For the first-category PMI information other than the reference first-category PMI information in at least one first-category PMI information associated with the CSI report, the terminal feeds back in the CSI report an offset of the first-category PMI information relative to the reference first-category PMI information.

Optionally, the offset is associated with at least one of the following: sequence number difference, angle difference, index difference, phase difference. For example, the terminal may directly include the offset in the CSI report, or may include indication information of the offset in the CSI report. For example, assuming that the sequence number difference between a certain first-category PMI information and the reference first-category PMI information is 1, the CSI report may carry a value of "1", or, the identifiers corresponding to the sequence number differences within a certain interval range may be pre-set. For example, assuming that the interval range is 2, the identifier corresponding to the sequence number difference of -2 with respect to the reference first-category PMI information may be pre-set to 0, the identifier corresponding to the sequence number difference of -1 with respect to the reference first-category PMI information may be pre-set to 1, the identifier corresponding to the sequence number difference of 1 with respect to the reference first-category PMI information may be pre-set to 2, and the identifier corresponding to the sequence number difference of 2 with respect to the reference first-category PMI information may be pre-set to 3. Assuming that the sequence number difference between a certain first-category PMI information and the reference first-category PMI information is 1, the CSI report may carry the identifier "2".

The reference first-category PMI information may be one of the following in at least one first-category PMI information:

1) The first type of PMI information with the smallest associated reference signal port number;

2) the first type of PMI information associated with the first configured reference signal;

3) the first type of PMI information associated with the port with the smallest port number of the first configured reference signal;

4) the first first-category PMI information among the at least one first-category PMI information fed back by the terminal;

5) one first-category PMI information among at least one first-category PMI information indicated by the terminal;

6) Others.

In an embodiment of the present application, for one or more reference first-class PMI parts, the terminal determines a reference first-class PMI part, and for the first-class PMI part other than the reference first-class PMI part, the terminal feeds back its offset relative to the reference first-class PMI part, and the network side device obtains all the first-class PMI parts fed back by the terminal by obtaining the reference first-class PMI part and the offset; for multiple reference first-class PMIs, the terminal determines a reference first-class PMI, and for the first-class PMI other than the reference first-class PMI, the terminal feeds back its offset relative to the reference first-class PMI, and the network side device obtains all the first-class PMIs fed back by the terminal by obtaining the reference first-class PMI and the offset.

In one implementation, the CSI report may also include or be associated with a target value, wherein the target value includes one of: at least one first value, at least one second value, and at least one second value, wherein the target value is used to determine or indicate a predetermined value associated with the first type of PMI information.

In the above implementation, the target value may be directly included in the CSI report, or the target value may be associated with the CSI report, for example, the CSI report includes identification information of the target value. For example, the index corresponding to the candidate value of each target value may be preset, and the actual index of the target value may be included in the CSI report, thereby reducing the feedback overhead of the target value.

The predetermined value associated with the first type of PMI information may include at least one of the following associated with the first type of PMI information: power information, energy information, and signal-to-noise ratio information. For example, the first value and/or the second value is used to determine or illustrate the power information or energy information associated with the first type of PMI or the first type of PMI part.

Optionally, when the target value includes the second value, at least one of the second values in the CSI report is associated with one of the first values.

In one embodiment, when a CSI report is associated with a first type of PMI, the CSI report also includes at least one first value, or at least one first value and at least one second value, for indicating to the network side device the power information or energy information of the first type of PMI or the first type of PMI part associated with the CSI report. The network side device can judge the strength of the first type of PMI or the first type of PMI part according to the at least one first value or the at least one second value, so that the network side device can select or update the first type of PMI or the first type of PMI part. Among them, the first value includes but is not limited to: Reference Signal Received Power (RSRP), signal-to-noise and interference ratio (SINR), RSRP index value (index), SINR index, etc. Among them, the RSRP index and SINR index are associated with a row or a column of an RSRP or SINR table. Optionally, the first value is obtained using the first type of PMI or the first type of PMI part, that is, the terminal needs to consider the first type of PMI or the first type of PMI part associated with the first value during the process of obtaining the first value.

For example, the first value is RSRP or associated RSRP, where RSRP is defined as the linear average of the power (in watts (W)) contributions of all or part of the resource elements (REs) of the reference signal after all or part of the antenna ports are multiplied by the first type of PMI or the first PMI part within the considered measurement bandwidth in the configured reference signal measurement opportunity. Alternatively, the linear average of the power contributions of all or part of the REs after all or part of the antenna ports of the reference signal are precoded using the first type of PMI or the first PMI part within the considered measurement bandwidth.

Optionally, when the target value includes the second value, at least one of the second values in the CSI report is a differential value associated with one of the first values.

The second value is a differential value and is associated with the first value, and the differential value may be an RSRP differential value, an SINR differential value, an RSRP index differential value, or an SINR index differential value. Optionally, the CSI report may include only the first value, that is, there is no differential value in the CSI report.

Optionally, when the target value includes the second value, the first value is associated with a specified value among multiple third values associated with multiple first-category PMI information, and the specified value is one of the following: a maximum value among the multiple third values, a strongest value among the multiple third values, or any one of the multiple third values. For example, the first value is associated with the strongest or largest third value among multiple third values associated with multiple first-category PMIs or multiple first-category PMI parts.

In an optional implementation, the CSI report may include: at least one second value and one first value, the first value being one of multiple third values associated with multiple first-type PMI information, and at least one second value being a difference between each third value other than the first value among the multiple third values and the first value. In the above optional implementation, the first value is associated with a specified value among the multiple third values, and the second value is a difference between each third value other than the first value among the multiple third values and the first value, thereby further reducing the feedback overhead of the target value.

Among them, in an optional manner, the second value is associated with a difference value between a third value other than the specified value in the plurality of third values and the first value, such as an RSRP difference value, an SINR difference value, an RSRP index difference value, an SINR index difference value, etc. Optionally, since the first value is the largest third value, if the second value is an RSRP difference value or an SINR difference value, the second value is less than or equal to 0.

In one embodiment, when a first type of PMI is associated in a CSI report, the CSI report also includes or is associated with at least one first value and at least one second value, and the first value includes but is not limited to: RSRP, SINR, RSRP index, SINR index, etc. Optionally, the second value is a differential value and is associated with the first value. Among them, optionally, the first value is the strongest or largest third value among multiple third values associated with multiple first type PMIs or multiple first type PMI parts. Optionally, the terminal needs to indicate the measurement resource information or measurement resource port information associated with the at least one first value to the network side device in the CSI report. Optionally, the measurement resource information or measurement resource port information associated with the at least one first value is used by the network side device to determine the corresponding order of the first value and the second value and the measurement resource or measurement resource port. The third value includes but is not limited to: RSRP, SINR, RSRP index, SINR index, etc. Optionally, the third value is obtained using the first type of PMI or the first type of PMI part, that is, the terminal needs to consider the first type of PMI or the first type of PMI part associated with the third value in the process of obtaining the third value.

For example, the third value is RSRP or associated RSRP, where RSRP is defined as the linear average of the power contributions of all or part of the REs after all or part of the antenna ports of the reference signal are multiplied by the first type of PMI or the first PMI part within the considered measurement bandwidth in the configured reference signal measurement opportunity; or, within the considered measurement bandwidth, the linear average of the power contributions of all or part of the REs after all or part of the antenna ports of the reference signal are precoded using the first type of PMI or the first PMI part.

For another example, the third value is a traditional SINR or an associated traditional SINR, where the SINR is defined as the linear average of the power contributions of all or part of the REs after all or part of the antenna ports of the reference signal are multiplied by the first type of PMI or the first PMI part, divided by the linear average of the noise and interference power contributions; or, within the considered measurement bandwidth, after all or part of the antenna ports of the reference signal are precoded using the first type of PMI or the first PMI part, the linear average of the power contributions of all or part of the REs is divided by the linear average of the noise and interference power contributions.

In the above implementation, optionally, the sum of the number of the first values and the number of the second values is the number of the first type of PMI information associated with the CSI report.

For example, if a CSI report includes or is associated with four first-class PMIs, the terminal can obtain four third values, such as RSRP, where the calculation of each RSRP needs to consider the corresponding first-class PMI (i.e., multiplying the first-class PMI by the channel obtained by the corresponding reference signal port). The first value is associated with the maximum value of the four RSRPs, and the second value is associated with the difference between the other third values other than the first value and the first value. Since the other third values other than the first value are less than or equal to the first value, the second value is optionally less than or equal to 0.

In another embodiment, the first value may be any one of a plurality of third values associated with a plurality of first-class PMIs or a plurality of first-class PMI parts, or the first value may be a value fed back by the terminal and the value may be associated with a third value, or the first value may be a default value among a plurality of third values. Optionally, the terminal needs to indicate to the network in the CSI report the measurement resource information or measurement resource port information associated with the at least one first value. Optionally, the measurement resource information or measurement resource port information associated with the at least one first value is used by the network to determine the corresponding order of the first value and the second value and the measurement resource or measurement resource port. The third value includes but is not limited to: RSRP, SINR, RSRP index, SINR index, etc. Optionally, the third value is obtained using the first-class PMI or the first-class PMI part, that is, the terminal needs to consider the first-class PMI or the first-class PMI part associated with the third value in the process of obtaining the third value.

The second value is a difference between a third value other than a third value associated with the associated first value and the first value, for example, an RSRP difference value, an SINR difference value, an RSRP index difference value, an SINR index difference value, etc. Optionally, the sum of the number of the first values and the number of the second values is the number of first-category PMIs or first-category PMI parts included or associated in the CSI report.

For example, if a CSI report includes or is associated with four first-class PMIs, the terminal can obtain four third values, such as RSRP, where the calculation of each RSRP needs to consider the corresponding first-class PMI (that is, multiplying the first-class PMI by the channel obtained by the corresponding reference signal port). The terminal feeds back the first value associated with the first RSRP of the four RSRPs according to the default rule, and the second value is associated with the difference between the third values other than the first value and the first value.

In the above implementation, optionally, the third value is obtained by or using the first type of PMI information. For example, the third value is obtained using the first type of PMI or part of the first PMI.

In one implementation, when the target value includes the second value, the method further includes:

Step 1, the terminal obtains multiple third values associated with multiple pieces of the first-category PMI information;

Step 2: The terminal obtains the at least one second value, wherein the second value is a difference between the third value and the first value, and the first value is a value fed back by the terminal. That is, in this implementation, the CSI report may include: at least one second value and one first value, and the at least one second value includes a difference between each third value and the first value among multiple third values associated with multiple first-type PMI information.

The third value may also be obtained by or using the first type of PMI information.

In one embodiment, when a first type of PMI is associated in a CSI report, the CSI report also includes or is associated with at least one first value and at least one second value, wherein the first value includes but is not limited to: RSRP, SINR, RSRP index, SINR index, etc. Optionally, the second value is a differential value and is associated with the first value. Optionally, the second value is associated with the first type of PMI or the first type of PMI part in a certain order, that is, the number of the second values is the number of the first type of PMI or the first type of PMI part included in the CSI report.

For example, the third value is RSRP or associated RSRP, where RSRP is defined as the linear average of the power contributions of all or part of the REs after all or part of the antenna ports of the reference signal are multiplied by the first type of PMI or the first PMI part within the considered measurement bandwidth in the configured reference signal measurement opportunity; or, within the considered measurement bandwidth, the linear average of the power contributions of all or part of the REs after all or part of the antenna ports of the reference signal are precoded using the first type of PMI or the first PMI part.

For another example, the third value is a traditional SINR or an associated traditional SINR, wherein the SINR is defined as the linear average of the power contributions of all or part of the REs after all or part of the antenna ports of the reference signal are multiplied by the first type of PMI or the first PMI part, divided by the linear average of the noise and interference power contributions; or, within the considered measurement bandwidth, after all or part of the antenna ports of the reference signal are precoded using the first type of PMI or the first PMI part, the linear average of the power contributions of all or part of the REs is divided by the linear average of the noise and interference power contributions.

Optionally, the first value is a value fed back by the terminal; the terminal may obtain the first value through a reference signal or a reference signal port.

For example, the first value is a traditional RSRP or an associated traditional RSRP, where RSRP is defined as a linear average of power contributions of all or part of the REs of all or part of the antenna ports carrying the reference signal configured for RSRP measurement within the considered measurement bandwidth in the configured reference signal measurement opportunity. Optionally, the second value is associated with the first value and is an RSRP differential value relative to the first value.

For another example, the first value is a conventional SINR or an associated conventional SINR, wherein the SINR is defined as a linear average of power contributions of REs carrying reference signals divided by a linear average of noise and interference power contributions.

In the above implementation, the sum of the number of the first values and the number of the second values is greater than the number of the first type of PMI information associated with the CSI report. Since the first value may not be associated with any first type of PMI or first type of PMI part and is a value fed back by the terminal, the sum of the number of the first values and the second value is greater than the number of first type of PMI or first type of PMI part included or associated in the CSI report.

For example, if a CSI report includes or is associated with 4 first-class PMIs, the terminal can obtain 4 third values such as RSRP, where the calculation of each RSRP needs to consider the corresponding first-class PMI (that is, multiplying the first-class PMI by the channel obtained by the corresponding reference signal port). The first value is the L1-RSRP value obtained by the terminal according to the reference signal or reference signal port, and the second value is associated with the difference between the third value and the first value, so the terminal feeds back 4 second values and one first value.

In one implementation, when at least one second-category PMI information is associated with a CSI report, the terminal determines the CSI report in step 202, which may include:

The terminal determines, according to one of the following, the amount of the second-category PMI information associated with the CSI report:

(1) Third-party network signaling;

(2) Default rules;

(3) The quantity of the first type of PMI information.

In an embodiment of the present application, the terminal can determine the number of second-category PMIs through the number of first-category PMIs or parts of first-category PMIs configured by network signaling; or, the terminal can determine the number of second-category PMIs through reference signal configuration signaling configured by network signaling; or, the terminal can obtain the number of second-category PMIs through network signaling; or, the terminal can determine the number of second-category PMIs based on the number of first-category PMIs or parts of first-category PMIs fed back by the terminal.

In one implementation, in order to reduce the feedback overhead of the second type of PMI information, a plurality of the second type of PMI information shares at least one of the following indications:

(1) Spatial basis vector indication;

(2) Spatial basis vector group indication;

(3) Frequency domain basis vector indication;

(4) Frequency domain basis vector group indication;

(5) non-zero coefficient indication;

(6) Strongest coefficient indication;

(7) rank indication;

(8) Reference signal port indication;

(9) Indication of the number of non-zero coefficients.

In the embodiment of the present application, at least one indication from (1) to (9) mentioned above is shared among multiple pieces of the second-type PMI information, thereby reducing the feedback overhead of the terminal in the process of feeding back the second-type PMI information.

In one implementation, the CSI report includes 1 reference spatial base vector indication and (N-1) spatial base vector indications offset relative to the reference spatial base vector indication, where N is the number of second-type PMI information associated with the CSI report.

For example, when the second-type PMI information is associated with the Type 1 type codebook, if N second-type PMI information is associated, a reference second-type PMI information is fed back, and for the other N-1 second-type PMI information, the terminal feeds back its spatial basis vector offset relative to the reference second-type PMI information, thereby reducing the feedback overhead. Further optionally, the reference second-type PMI information can be associated with a default first-type PMI information, or the reference second-type PMI information can be associated with a first-type PMI information indicated by the terminal.

Through the above implementation, the terminal feedback CSI report includes the offsets of N-1 spatial basis vector indications instead of directly including N spatial basis vector indications, thereby reducing the second type PMI feedback overhead.

In one implementation, when there are multiple second-category PMI information, the first part of the CSI report further includes: multiple non-zero coefficient quantity indications, wherein each non-zero coefficient quantity indication is associated with one second-category PMI information. In this implementation, the number of non-zero coefficients included in each second-category PMI information can be indicated by one non-zero coefficient quantity indication, and the network-side device can determine the size of the second part of the CSI report according to the multiple non-zero coefficient quantity indications.

Optionally, in the case where there are multiple second-category PMI information, the first part of the CSI report further includes: 1 non-zero coefficient number indication associated with multiple second-category PMI information. In this optional implementation, the number of non-zero coefficients indicated by the non-zero coefficient number indication is the sum of the numbers of non-zero coefficients of multiple second-category PMI information. That is, in this optional implementation, 1 non-zero coefficient number indication is used to indicate the sum of the numbers of non-zero coefficients of multiple second-category PMI information.

In an implementation manner, when at least one second-category PMI information is associated with a CSI report, the CSI report further includes one of the following:

(1) Includes only a wideband channel quality indicator (CQI);

(2) including N wideband CQIs, where N is the number of second-type PMI information associated with the CSI report;

(3) Only one wideband CQI and multiple subband CQIs are included;

(4) It includes N wideband CQIs and multiple sub-band CQIs, each wideband CQI in the N wideband CQIs is independently acquired, and N is the number of second-type PMI information associated with the CSI report.

In the above implementation, the terminal obtains a broadband CQI according to at least one second-category PMI information through network indication or protocol agreement; or, the terminal may also obtain a broadband CQI for each second-category PMI information through network indication or protocol agreement; or, the terminal may also obtain a broadband CQI and multiple sub-band CQIs through network indication or protocol agreement, wherein one broadband CQI is associated with all second-category PMI information, and one sub-band CQI is associated with one second-category PMI information; or, the terminal may also obtain N broadband CQIs and multiple sub-band CQIs through network indication or protocol agreement, wherein one broadband CQI is associated with one second-category PMI information, and one sub-band CQI is associated with one second-category PMI information, and further, the N broadband CQIs are obtained according to their respective associated second-category PMI information, that is, they are independently obtained.

In practical applications, the more CQIs there are, the more information the network obtains, the more flexible the scheduling is, but the greater the overhead is. Therefore, for the case of N second-category PMI information, the network side device can configure the terminal's CQI feedback number to one of the above (1) to (4) based on the actual situation or the channel information that has been obtained to meet different needs.

In one implementation, when the CSI report is associated with at least one first type of precoding matrix indication PMI information and at least one second type of PMI information, the CSI report only feeds back the at least one second type of PMI information, indicating that the at least one second type of PMI information is obtained based on the first type of PMI information in the most recently fed back CSI report that includes the first type of PMI information.

That is to say, when the terminal reports the CSI report to the network side device in the above-mentioned step 204, when the CSI report is associated with at least one first-type precoding matrix indication PMI information and at least one second-type PMI information, the terminal may report the at least one second-type PMI information in the CSI report instead of reporting at least one first-type PMI information. In this case, the indication of the at least one second-type PMI information is obtained based on the first-type PMI information in the CSI report that is most recently fed back and includes the first-type PMI information.

Optionally, the most recently fed back CSI report includes at least one of the following:

(1) the most recently reported CSI report among all CSI reports associated with the same CSI report setting as the currently reported CSI report;

(2) associating the most recently reported CSI report among all CSI reports of a second CSI reporting setting, where the second CSI reporting setting is the CSI reporting setting associated with the first CSI reporting setting associated with the currently reported CSI report;

(3) The most recently reported CSI report among all CSI reports associated with a third CSI report setting, wherein the third CSI setting is a CSI report setting associated with the same serving cell, carrier or reference signal as the first CSI report setting associated with the currently reported CSI report.

For example, in a periodic CSI report setting, when the associated PMI information includes first-category PMI information and second-category PMI information, the network can configure the feedback period of the first-category PMI information to be 10ms and the feedback period of the second-category PMI information to be 5ms through signaling. At this time, there is a CSI report that only includes second-category PMI information. The terminal and the network assume that the second-category PMI information of the CSI report is obtained based on the first-category PMI information of the strongest feedback.

For example, in a periodic CSI report setting, when the associated PMI information includes the first category PMI information and the second category PMI information, the terminal obtains the first category PMI information and the second category PMI information. If the terminal finds that the first category PMI information is the same as the first category PMI information of the most recently fed back CSI report, the terminal can only feed back the second category PMI information and indicate to the network that the CSI report does not include the first category PMI information. The network assumes that the second category PMI information of the CSI report is obtained based on the first category PMI information of the strongest first feedback CSI report.

In the embodiment of the present application, for the PMI information associated with the CSI report, that is, including the first category PMI information and the second category PMI information, the terminal can only feedback the second category PMI information through network configuration or terminal selection, which means that at least one of the at least one first category PMI information and the at least one second category PMI information associated with the current CSI report is at least one first category PMI information, and the terminal assumes that it is consistent with the first category PMI information associated with the most recently fed back CSI report. At this time, in the current CSI report, the terminal does not feedback the first category PMI information, but only feedbacks the second category PMI information, thereby reducing the feedback overhead of the current CSI report. Optionally, the terminal indicates to the network that the current CSI report does not include the first category PMI information, and the network determines the size of the CSI report according to the indication, and further determines at least one first category PMI information associated with the CSI report according to the above rules.

FIG3 shows a schematic flow chart of a method for acquiring channel state information provided in an embodiment of the present application. Referring to FIG3 , the method may include the following steps.

Step 302: The network side device receives a CSI report reported by the terminal, wherein the CSI report is associated with at least one of the following:

(1) at least one first-type precoding matrix indicates PMI information;

(2) at least one second type of PMI information;

The second type of PMI information is obtained based on the first type of PMI information.

Optionally, the first-category PMI information and the second-category PMI information have different uses.

Among them, the terminal can report the CSI report according to the method shown in Figure 2 above. Please refer to the above related description for details, which will not be repeated here.

In an embodiment of the present application, the network side device determines the CSI report through the receiving terminal and then reports the CSI report, and the CSI report is associated with at least one of the following: at least one first-type precoding matrix indication PMI information; at least one second-type PMI information; so that the network side device can obtain PMI information of different purposes associated with the CSI report, such as simulated beam information, to improve the flexibility of network scheduling.

In one implementation, before the network side device receives the CSI report reported by the terminal in step 302, the method may further include at least one of the following:

(1) The network side device sends a high-layer signaling to the terminal, wherein the high-layer signaling is used to indicate one of the following: the CSI report is associated with the first-category PMI information; the CSI report is associated with the first-category PMI information and the second-category PMI information;

(2) The network side device sends a first network signaling to the terminal, where the first network signaling is used to indicate an acquisition range of multiple first-category PMI information associated with the CSI report;

(3) The network side device sends a second network signaling to the terminal, where the second network signaling is used to indicate an interval range between multiple pieces of the first-type PMI information;

(4) The network side device sends a third network signaling to the terminal, where the third network signaling is used to indicate the amount of the second type of PMI information associated with the CSI report.

In an embodiment of the present application, the network side device sends high-layer signaling to the terminal, so that the terminal can determine, according to the high-layer signaling, that the CSI report is associated with the first category of PMI information, or that the CSI report is associated with the first category of PMI information and the second category of PMI information. The network side device sends a first network signaling to the terminal, so that the terminal can determine the acquisition range of each of the first category of PMI information according to the first network signaling. The network side device sends a second network signaling to the terminal, so that the terminal can determine the interval range between multiple first category PMI information according to the second network signaling. The network side device sends a third network signaling to the terminal, so that the terminal can determine the number of the second category of PMI information associated with the CSI report according to the third network signaling.

Optionally, the first-category PMI information includes one of the following:

(1) a first-category PMI;

(2) A first-category PMI part, wherein the one first-category PMI is composed of at least one of the first-category PMI parts.

In one implementation, the above-mentioned CSI report may include: reference first-category PMI information, and the offset of other first-category PMI information in at least one first-category PMI information relative to the reference first-category PMI information, wherein the reference first-category PMI information is one of the at least one first-category PMI information, and the other first-category PMI information is the first-category PMI information in the at least one first-category PMI information other than the reference first-category PMI information.

Optionally, the offset is associated with at least one of the following: sequence number difference, angle difference, index difference, and phase difference.

In one implementation, the above-mentioned CSI report also includes or is associated with a target value, and the target value includes one of the following: at least one first value, at least one first value and at least one second value, wherein the target value is used to determine or indicate a predetermined value associated with the first type of PMI information.

The target value is used to determine or indicate a predetermined value associated with the first type of PMI information, and the target value may include a target value used to determine or indicate power information or energy information associated with the first type of PMI information.

Optionally, when the target value includes the second value, at least one second value in the CSI report is associated with one first value.

Optionally, when the target value includes the second value, at least one second value in the CSI report is a differential value associated with one of the first values.

Optionally, the CSI report includes the first values, and the sum of the number of the first values and the number of the second values is greater than the number of the first type of PMI information associated with the CSI report.

Optionally, when the target value includes the second value, the first value is associated with a specified value among multiple third values associated with multiple first-category PMI information, and the specified value is one of: the maximum value among the multiple third values, the strongest value among the multiple third values, or any one of the multiple third values.

Optionally, the second value is associated with a difference between the first value and a third value among the multiple third values excluding the specified value, or the sum of the number of the first values and the number of the second values is the number of the first type of PMI information associated with the CSI report.

FIG. 4 shows that in one implementation, after the network side device receives the CSI report reported by the terminal in the above step 302, the method may further include:

Step 304: When the CSI report does not include the at least one second-category PMI information, the network-side device determines that the second-category PMI information obtained by the terminal is obtained based on the first-category PMI information in the CSI report that is most recently fed back by the terminal and includes the first-category PMI information. In this implementation, when the CSI report is associated with at least one first-category precoding matrix indication PMI information and at least one second-category PMI information, if the CSI report only feeds back the at least one second-category PMI information, the network-side device may determine that the second-category PMI information obtained by the terminal is obtained based on the first-category PMI information in the CSI report that is most recently fed back by the terminal and includes the first-category PMI information, that is, the first-category PMI information corresponding to the second-category PMI information fed back by the current terminal is the first-category PMI information fed back most recently.

Optionally, the most recently fed back CSI report includes at least one of the following:

(1) the most recently reported CSI report among all CSI reports associated with the same CSI report setting as the currently reported CSI report;

(2) associating the most recently reported CSI report among all CSI reports of a second CSI reporting setting, where the second CSI reporting setting is the CSI reporting setting associated with the first CSI reporting setting associated with the currently reported CSI report;

(3) The most recently reported CSI report among all CSI reports associated with a third CSI report setting, wherein the third CSI setting is a CSI report setting associated with the same object as the first CSI report setting associated with the currently reported CSI report, wherein the object includes one of the following: a serving cell, a carrier, and a reference signal.

The channel state information reporting method provided in the embodiment of the present application can be executed by a channel state information reporting device. In the embodiment of the present application, the channel state information reporting method performed by the channel state information reporting device is taken as an example to illustrate the channel state information reporting device provided in the embodiment of the present application.

FIG5 shows a schematic structural diagram of a channel state information reporting device provided in an embodiment of the present application. Referring to FIG5 , the device 500 may include a determination module 51 and a reporting module 52 .

The determining module 51 is used to determine a channel state information CSI report; the reporting module 52 is used to report the CSI report to a network side device; wherein the CSI report is associated with at least one of the following:

(1) at least one first-type precoding matrix indicates PMI information;

(2) at least one second type of PMI information;

The second type of PMI information is obtained based on the first type of PMI information.

In one implementation, the determination module 51 is further configured to determine, according to the high-layer signaling, one of the following:

(1) the CSI report is associated with the first type of PMI information;

(2) The CSI report associates the first-category PMI information with the second-category PMI information.

In one implementation, the above-mentioned determination module 51 may also be used for at least one of the following:

(1) determining, according to a first network signaling, an acquisition range of each of the first-category PMI information, wherein the first network signaling is used to indicate the acquisition range of multiple first-category PMI information;

(2) Determine, according to a second network signaling, an interval range between multiple pieces of the first-category PMI information, wherein the second network signaling is used to indicate the interval range between multiple pieces of the first-category PMI information.

In one implementation, the above-mentioned determination module 51 may also be used for at least one of the following:

(1) selecting, according to the first network signaling, at least one first-category PMI information associated with the CSI report within the acquisition range, wherein first indication information of the at least one first-category PMI information is fed back in the CSI report, and feedback overhead of the first indication information is determined based on a size of the acquisition range associated with the first network signaling;

(2) According to the second network signaling, at least one of the first-category PMI information associated with the CSI report is selected, wherein, for other first-category PMI information except the reference first-category PMI information in the selected at least one first-category PMI information, the interval between the other first-category PMI information and the reference first-category PMI information is within the interval range, and second indication information is fed back in the CSI report, the second indication information is used to indicate one of the reference first-category PMI information selected by the terminal and the offset of each first-category PMI information relative to the reference first-category PMI information, and the feedback overhead of the second indication information is determined based on the size of the interval range associated with the second network signaling.

In one implementation, the first-category PMI information includes one of the following:

(1) a first-category PMI;

(2) A first-category PMI part, wherein the one first-category PMI is composed of at least one of the first-category PMI parts.

In one implementation, the above-mentioned determination module 51 can also be used to: determine a reference first-category PMI information in at least one of the first-category PMI information; for the first-category PMI information other than the reference first-category PMI information in the CSI report associated with at least one first-category PMI information, the offset of the first-category PMI information relative to the reference first-category PMI information is fed back in the CSI report.

In one implementation, the offset is associated with at least one of the following: a sequence number difference, an angle difference, an index difference, and a phase difference.

In one implementation, the CSI report also includes or is associated with a target value, wherein the target value includes one of: at least one first value, at least one second value, and at least one second value, wherein the target value is used to determine or indicate a predetermined value associated with the first type of PMI information.

In an implementation, when the target value includes the second value, at least one of the second values in the CSI report is associated with one of the first values.

In an implementation, when the target value includes the second value, at least one of the second values in the CSI report is a differential value associated with one of the first values.

In one implementation, when the target value includes the second value, the first value is associated with a specified value among multiple third values associated with multiple first-category PMI information, and the specified value is one of the following: the maximum value among the multiple third values, the strongest value among the multiple third values, or any one of the multiple third values.

In one implementation, the second value is associated with a difference between a third value among the plurality of third values excluding the designated value and the first value.

In one implementation, the sum of the number of the first values and the number of the second values is the number of the first type of PMI information associated with the CSI report.

In one implementation, when the target value includes the second value, the above-mentioned device 500 may also include an acquisition module for acquiring multiple third values associated with multiple first-category PMI information; acquiring at least one second value, wherein the second value is the difference between the third value and the first value, and the first value is a value fed back by the terminal.

In an implementation manner, the third value is acquired by or using the first type of PMI information.

In one implementation, the sum of the number of the first values and the number of the second values is greater than the number of the first type of PMI information associated with the CSI report.

In an implementation manner, the above-mentioned determination module 51 may be used to: determine the amount of the second-category PMI information associated with the CSI report according to one of the following:

(1) Third-party network signaling;

(2) Default rules;

(3) The quantity of the first type of PMI information.

In one implementation, at least one of the following indications is shared among a plurality of the second-category PMI information:

(1) Spatial basis vector indication;

(2) Spatial basis vector group indication;

(3) Frequency domain basis vector indication;

(4) Frequency domain basis vector group indication;

(5) non-zero coefficient indication;

(6) Strongest coefficient indication;

(7) rank indication;

(8) Reference signal port indication;

(9) Indication of the number of non-zero coefficients.

In one implementation, the CSI report includes: 1 reference spatial basis vector indication and (N-1) spatial basis vector indications offset relative to the reference spatial basis vector indication, where N is the number of second-type PMI information associated with the CSI report.

In one implementation, when there are multiple pieces of the second-category PMI information, the first part of the CSI report also includes: multiple non-zero coefficient quantity indications, wherein each of the non-zero coefficient quantity indications is associated with one piece of the second-category PMI information.

In one implementation, when there are multiple pieces of the second-type PMI information, the first part of the CSI report also includes: an indication of the number of non-zero coefficients associated with the multiple pieces of the second-type PMI information.

In one implementation, the CSI report further includes one of the following:

(1) Only one wideband channel quality indicator CQI is included;

(2) including N wideband CQIs, where N is the number of second-type PMI information associated with the CSI report;

(3) Only one wideband CQI and multiple subband CQIs are included;

(4) It includes N wideband CQIs and multiple sub-band CQIs, each wideband CQI in the N wideband CQIs is independently acquired, and N is the number of second-type PMI information associated with the CSI report.

In one implementation, when the CSI report is associated with at least one first type of precoding matrix indication PMI information and at least one second type of PMI information, the CSI report only feeds back the at least one second type of PMI information, indicating that the at least one second type of PMI information is obtained based on the first type of PMI information in the most recently fed back CSI report that includes the first type of PMI information.

In an implementation manner, the most recently fed back CSI report includes at least one of the following:

(1) the most recently reported CSI report among all CSI reports associated with the same CSI report setting as the currently reported CSI report;

(2) associating the most recently reported CSI report among all CSI reports of a second CSI reporting setting, where the second CSI reporting setting is the CSI reporting setting associated with the first CSI reporting setting associated with the currently reported CSI report;

(3) The most recently reported CSI report among all CSI reports associated with a third CSI report setting, wherein the third CSI setting is a CSI report setting associated with the same object as the first CSI report setting associated with the currently reported CSI report, wherein the object includes at least one of the following: a serving cell, a carrier, and a reference signal.

The reporting device of the channel state information in the embodiment of the present application can be an electronic device, such as an electronic device with an operating system, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or it can be other devices other than a terminal. Exemplarily, the terminal can include but is not limited to the types of terminals 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

The channel state information reporting device provided in the embodiment of the present application can implement each process implemented by the method embodiment of Figure 2 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

The channel state information acquisition method provided in the embodiment of the present application can be executed by a channel state information acquisition device. In the embodiment of the present application, the channel state information acquisition method performed by the channel state information acquisition device is taken as an example to illustrate the channel state information acquisition device provided in the embodiment of the present application.

FIG6 shows a schematic structural diagram of a channel state information reporting device provided in an embodiment of the present application. Referring to FIG6 , the device 600 may include a receiving module 61 and an acquiring module 62 .

The receiving module 61 is used to receive a CSI report reported by the terminal, wherein the CSI report is associated with at least one of the following:

(1) at least one first-type precoding matrix indicates PMI information;

(2) at least one second type of PMI information;

The second type of PMI information is obtained based on the first type of PMI information;

The acquisition module 62 is used to acquire at least one of the following based on the CSI report: at least one first type of precoding matrix indication PMI information; at least one second type of PMI information.

In one implementation, as shown in FIG6 , the channel state information reporting device 600 may further include a sending module 63, which is used for at least one of the following:

(1) sending a high-layer signaling to the terminal, wherein the high-layer signaling is used to indicate one of the following: the CSI report is associated with the first-category PMI information; the CSI report is associated with the first-category PMI information and the second-category PMI information;

(2) sending a first network signaling to the terminal, where the first network signaling is used to indicate an acquisition range of multiple first-category PMI information associated with the CSI report;

(3) sending a second network signaling to the terminal, where the second network signaling is used to indicate an interval range between multiple pieces of the first-type PMI information;

(4) Sending a third network signaling to the terminal, where the third network signaling is used to indicate the amount of the second type of PMI information associated with the CSI report.

In one implementation, the first-category PMI information includes one of the following:

(1) a first-category PMI;

(2) A first-category PMI part, wherein the one first-category PMI is composed of at least one of the first-category PMI parts.

In one implementation, the CSI report includes: reference first-category PMI information, and an offset of other first-category PMI information in at least one first-category PMI information relative to the reference first-category PMI information, wherein the reference first-category PMI information is one of the at least one first-category PMI information, and the other first-category PMI information is first-category PMI information in the at least one first-category PMI information other than the reference first-category PMI information.

In one implementation, the CSI report also includes or is associated with a target value, wherein the target value includes one of: at least one first value, at least one second value, and at least one second value, wherein the target value is used to determine or indicate a predetermined value associated with the first type of PMI information.

In an implementation, when the target value includes the second value, the at least one second value in the CSI report is associated with one first value.

In an implementation, when the target value includes the second value, the at least one second value in the CSI report is a differential value associated with one of the first values.

In an implementation manner, the CSI report includes the first values, and a sum of the number of the first values and the number of the second values is greater than the number of the first type of PMI information associated with the CSI report.

In one implementation, when the target value includes the second value, the first value is associated with a specified value among multiple third values associated with multiple first-category PMI information, and the specified value is one of the following: the maximum value among the multiple third values, the strongest value among the multiple third values, or any one of the multiple third values.

In one implementation, the second value is associated with a difference between the first value and a third value among the multiple third values excluding the specified value, or the sum of the number of the first values and the number of the second values is the number of the first type of PMI information associated with the CSI report.

In one implementation, the above-mentioned channel state information reporting device 600 may also include a determination module for determining, when the CSI report does not include the at least one second-type PMI information, that the second-type PMI information obtained by the terminal is obtained based on the first-type PMI information in the CSI report that is most recently fed back by the terminal and includes the first-type PMI information.

In an implementation manner, the most recently fed back CSI report includes at least one of the following:

(1) the most recently reported CSI report among all CSI reports associated with the same CSI report setting as the currently reported CSI report;

(2) associating the most recently reported CSI report among all CSI reports of a second CSI reporting setting, where the second CSI reporting setting is the CSI reporting setting associated with the first CSI reporting setting associated with the currently reported CSI report;

(3) The most recently reported CSI report among all CSI reports associated with a third CSI report setting, wherein the third CSI setting is a CSI report setting associated with the same object as the first CSI report setting associated with the currently reported CSI report, wherein the object includes one of the following: a serving cell, a carrier, and a reference signal.

The device for acquiring the channel state information in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices other than a terminal. Exemplarily, the terminal may include but is not limited to the types of terminal 11 listed above, and other devices may be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

The channel state information acquisition device provided in the embodiment of the present application can implement the various processes implemented by the method embodiments of Figures 3 to 4 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

As shown in FIG7 , the embodiment of the present application further provides a communication device 700, including a processor 701 and a memory 702, wherein the memory 702 stores a program or instruction that can be run on the processor 701. For example, when the communication device 700 is a terminal, the program or instruction is executed by the processor 701 to implement the various steps of the above-mentioned channel state information reporting method embodiment, and can achieve the same technical effect. When the communication device 700 is a network side device, the program or instruction is executed by the processor 701 to implement the various steps of the above-mentioned channel state information acquisition method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

The embodiment of the present application also provides a terminal, including a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps in the method embodiment shown in Figure 2. This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to the terminal embodiment and can achieve the same technical effect. Specifically, Figure 8 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

The terminal 800 includes but is not limited to: a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809 and at least some of the components of a processor 810.

Those skilled in the art will appreciate that the terminal 800 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 810 through a power management system, so as to implement functions such as managing charging, discharging, and power consumption management through the power management system. The terminal structure shown in FIG8 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange components differently, which will not be described in detail here.

It should be understood that in the embodiment of the present application, the input unit 804 may include a graphics processing unit (GPU) 8041 and a microphone 8042, and the graphics processing unit 8041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 807 includes a touch panel 8071 and at least one of other input devices 8072. The touch panel 8071 is also called a touch screen. The touch panel 8071 may include two parts: a touch detection device and a touch controller. Other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (such as a volume control key, a switch key, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

In the embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 801 can transmit the data to the processor 810 for processing; in addition, the radio frequency unit 801 can send uplink data to the network side device. Generally, the radio frequency unit 801 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

The memory 809 can be used to store software programs or instructions and various data. The memory 809 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 809 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 809 in the embodiment of the present application includes but is not limited to these and any other suitable types of memories.

The processor 810 may include one or more processing units; optionally, the processor 810 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 810.

Among them, the processor 810 is used to determine the channel state information CSI report and report the CSI report to the network side device; wherein the CSI report is associated with at least one of the following: at least one first type of precoding matrix indication PMI information; at least one second type of PMI information; the first type of PMI information and the second type of PMI information have different uses, and the second type of PMI information is obtained based on the first type of PMI information.

It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment and achieve the same or corresponding technical effect. To avoid repetition, it will not be repeated here.

The embodiment of the present application also provides a network side device, including a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps of the method embodiment shown in Figures 3 to 4. The network side device embodiment corresponds to the above-mentioned network side device method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to the network side device embodiment, and can achieve the same technical effect.

Specifically, the embodiment of the present application also provides a network side device. As shown in Figure 9, the network side device 900 includes: an antenna 91, a radio frequency device 92, a baseband device 93, a processor 94 and a memory 95. The antenna 91 is connected to the radio frequency device 92. In the uplink direction, the radio frequency device 92 receives information through the antenna 91 and sends the received information to the baseband device 93 for processing. In the downlink direction, the baseband device 93 processes the information to be sent and sends it to the radio frequency device 92. The radio frequency device 92 processes the received information and sends it out through the antenna 91.

The method executed by the network-side device in the above embodiment may be implemented in the baseband device 93, which includes a baseband processor.

The baseband device 93 may include, for example, at least one baseband board, on which a plurality of chips are arranged, as shown in FIG. 9 , wherein one of the chips is, for example, a baseband processor, which is connected to the memory 95 through a bus interface to call a program in the memory 95 and execute the network device operations shown in the above method embodiment.

The network side device may also include a network interface 96, which is, for example, a Common Public Radio Interface (CPRI).

Specifically, the network side device 900 of the embodiment of the present application also includes: instructions or programs stored in the memory 95 and executable on the processor 94. The processor 94 calls the instructions or programs in the memory 95 to execute the methods executed by the modules shown in Figure 6 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned channel state information reporting method embodiment are implemented, or the various processes of the above-mentioned channel state information acquisition method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the various processes of the above-mentioned channel state information reporting method embodiment, or to implement the various processes of the above-mentioned channel state information acquisition method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

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

An embodiment of the present application further provides a computer program/program product, which is stored in a storage medium, and is executed by at least one processor to implement the various processes of the above-mentioned channel state information reporting method embodiment, or to implement the various processes of the above-mentioned channel state information acquisition method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

An embodiment of the present application also provides a wireless communication system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the channel state message reporting method as described above, and the network side device can be used to execute the steps of the channel state information acquisition method as described above.

It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment method can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, it can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, disk, CD, etc.), including several instructions to enable the terminal or network side device to execute the method described in each embodiment of the present application.

The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims (40)

A method for reporting channel state information, comprising: The terminal determines a channel state information CSI report; The terminal reports the CSI report to the network side device; The CSI report is associated with at least one of the following: At least one first type precoding matrix indicates PMI information; at least one second type of PMI information; The second type of PMI information is obtained based on the first type of PMI information. The method according to claim 1, wherein, before the terminal determines the CSI report, the method further comprises: the terminal determines, according to high-layer signaling, one of the following: The CSI report is associated with the first type of PMI information; The CSI report associates the first-category PMI information with the second-category PMI information. The method according to claim 2, wherein the terminal determines a channel state information CSI report, further comprising at least one of the following: The terminal determines, according to a first network signaling, an acquisition range of each of the first-category PMI information, wherein the first network signaling is used to indicate an acquisition range of multiple first-category PMI information; The terminal determines an interval range between multiple pieces of the first-category PMI information according to a second network signaling, wherein the second network signaling is used to indicate the interval range between multiple pieces of the first-category PMI information. The method according to claim 3, wherein the terminal determines a channel state information CSI report, further comprising at least one of the following: The terminal selects, within the acquisition range, at least one first-category PMI information associated with the CSI report according to the first network signaling, wherein first indication information of the at least one first-category PMI information is fed back in the CSI report, and feedback overhead of the first indication information is determined based on a size of the acquisition range associated with the first network signaling; The terminal selects at least one of the first-category PMI information associated with the CSI report according to the second network signaling, wherein, for other first-category PMI information except the reference first-category PMI information in the selected at least one first-category PMI information, the interval between the other first-category PMI information and the reference first-category PMI information is within the interval range, and second indication information is fed back in the CSI report, the second indication information is used to indicate one of the reference first-category PMI information selected by the terminal and the offset of each first-category PMI information relative to the reference first-category PMI information, and the feedback overhead of the second indication information is determined based on the size of the interval range associated with the second network signaling. The method according to any one of claims 1 to 4, wherein the first type of PMI information includes one of the following: a Category I PMI; A first-category PMI part, wherein the first-category PMI is composed of at least one of the first-category PMI parts. The method according to any one of claims 1 to 5, wherein the terminal determines a channel state information CSI report, further comprising: The terminal determines, by way of example, reference first-category PMI information in at least one of the first-category PMI information; For first-category PMI information other than the reference first-category PMI information in at least one first-category PMI information associated with the CSI report, the terminal feeds back an offset of the first-category PMI information relative to the reference first-category PMI information in the CSI report. The method according to claim 6, wherein the offset is associated with at least one of the following: a sequence number difference, an angle difference, an index difference, and a phase difference. The method according to any one of claims 1 to 5, wherein the CSI report also includes or is associated with a target value, and the target value includes one of the following: at least one first value, at least one second value, and at least one second value, wherein the target value is used to determine or indicate a predetermined value associated with the first type of PMI information. The method according to claim 8, wherein, in a case where the target value includes the second value, at least one of the second values in the CSI report is associated with one of the first values. The method according to claim 8, wherein, in the case where the target value includes the second value, At least one of the second values in the CSI report is a differential value associated with one of the first values. The method according to claim 8, wherein, when the target value includes the second value, the first value is associated with a specified value among multiple third values associated with multiple first-category PMI information, and the specified value is one of the following: the maximum value among the multiple third values, the strongest value among the multiple third values, or any one of the multiple third values. The method according to claim 11, wherein the second value is associated with a difference value between a third value other than the specified value among the plurality of third values and the first value. The method according to claim 11, wherein the sum of the number of the first values and the number of the second values is the number of the first type of PMI information associated with the CSI report. The method according to claim 8, wherein, in the case where the target value includes the second value, the method further comprises: The terminal obtains multiple third values associated with multiple pieces of the first-type PMI information; The terminal obtains the at least one second value, wherein the second value is a difference between the third value and the first value, and the first value is a value fed back by the terminal. The method according to claim 14, wherein the sum of the number of the first values and the number of the second values is greater than the number of the first type of PMI information associated with the CSI report. The method according to claim 1, wherein the terminal determines a channel state information CSI report, comprising: The terminal determines, according to one of the following, the amount of the second-category PMI information associated with the CSI report: Third network signaling; Default rules; The number of the first type of PMI information. The method according to claim 1, wherein at least one of the following indications is shared among a plurality of the second-category PMI information: Spatial basis vector indication; Spatial basis vector group indication; Frequency domain basis vector indication; Frequency domain basis vector group indication; Non-zero coefficient indication; The strongest coefficient indication; rank indication; Reference signal port indication; Indicator of the number of non-zero coefficients. The method according to claim 1, wherein the CSI report includes: 1 reference spatial basis vector indication and (N-1) spatial basis vector indications offset relative to the reference spatial basis vector indication, where N is the number of second-type PMI information associated with the CSI report. According to the method according to claim 1, when the number of the second-category PMI information is multiple, the first part of the CSI report also includes: multiple non-zero coefficient quantity indications, wherein each of the non-zero coefficient quantity indications is associated with one second-category PMI information. According to the method according to claim 1, when the number of the second-type PMI information is multiple, the first part of the CSI report also includes: 1 indication of the number of non-zero coefficients associated with multiple second-type PMI information. The method according to claim 1, wherein the CSI report further includes one of the following: Only one wideband channel quality indicator CQI is included; Including N wideband CQIs, where N is the number of second-type PMI information associated with the CSI report; Only one wideband CQI and multiple sub-band CQIs are included; It includes N wideband CQIs and multiple sub-band CQIs, each wideband CQI in the N wideband CQIs is independently acquired, and N is the number of second-type PMI information associated with the CSI report. The method according to any one of claims 1 to 21, wherein, when the CSI report is associated with at least one first type of precoding matrix indication PMI information and at least one second type of PMI information, the CSI report only feeds back the at least one second type of PMI information, and the CSI report is associated with at least one first type of PMI information based on the first type of PMI information in the most recently fed back CSI report that includes the first type of PMI information. The method according to claim 22, wherein the most recently fed back CSI report comprises at least one of the following: The most recently reported CSI report among all CSI reports associated with the same CSI report settings as the currently reported CSI report; The most recently reported CSI report among all CSI reports associated with a second CSI reporting setting, wherein the second CSI reporting setting is the CSI reporting setting associated with the first CSI reporting setting associated with the currently reported CSI report; The most recently reported CSI report among all CSI reports associated with a third CSI report setting, wherein the third CSI setting is a CSI report setting associated with the same object as the first CSI report setting associated with the currently reported CSI report, wherein the object includes at least one of the following: a serving cell, a carrier, a reference signal, a transmission status indication, and quasi-co-location information. A method for acquiring channel state information, comprising: The network side device receives a CSI report reported by the terminal, wherein the CSI report is associated with at least one of the following: At least one first type precoding matrix indicates PMI information; at least one second type of PMI information; The second type of PMI information is obtained based on the first type of PMI information. The method according to claim 24, wherein, before the network side device receives the CSI report reported by the terminal, the method further comprises at least one of the following: The network side device sends a high-layer signaling to the terminal, wherein the high-layer signaling is used to indicate one of the following: the CSI report is associated with the first type of PMI information; the CSI report is associated with the first type of PMI information and the second type of PMI information; The network side device sends a first network signaling to the terminal, where the first network signaling is used to indicate an acquisition range of multiple first-category PMI information associated with the CSI report; The network side device sends a second network signaling to the terminal, where the second network signaling is used to indicate an interval range between multiple pieces of the first-type PMI information; The network side device sends a third network signaling to the terminal, where the third network signaling is used to indicate the amount of the second type of PMI information associated with the CSI report. The method according to claim 24 or 25, wherein the first type of PMI information includes one of the following: a Category I PMI; A first-category PMI part, wherein the first-category PMI is composed of at least one of the first-category PMI parts. The method according to any one of claims 24 to 26, wherein the CSI report includes: reference first-category PMI information, and an offset of other first-category PMI information in at least one first-category PMI information relative to the reference first-category PMI information, wherein the reference first-category PMI information is one of the at least one first-category PMI information, and the other first-category PMI information is first-category PMI information in the at least one first-category PMI information other than the reference first-category PMI information. The method according to any one of claims 24 to 26, wherein the CSI report also includes or is associated with a target value, and the target value includes one of the following: at least one first value, at least one second value, and at least one second value, wherein the target value is used to determine or indicate a predetermined value associated with the first type of PMI information. The method of claim 28, wherein, in a case where the target value includes the second value, the at least one second value in the CSI report is associated with one of the first values. The method according to claim 28, wherein, in a case where the target value includes the second value, the at least one second value in the CSI report is a differential value associated with one of the first values. The method according to claim 30, wherein the first value is included in the CSI report, and the sum of the number of the first values and the number of the second values is greater than the number of the first type of PMI information associated with the CSI report. The method according to claim 28, wherein, when the target value includes the second value, the first value is associated with a specified value among multiple third values associated with multiple first-category PMI information, and the specified value is one of the following: the maximum value among the multiple third values, the strongest value among the multiple third values, or any one of the multiple third values. The method according to claim 32, wherein the second value is associated with the difference between the first value and a third value other than the specified value in the multiple third values, or the sum of the number of the first values and the number of the second values is the number of the first type of PMI information associated with the CSI report. The method according to any one of claims 24 to 33, wherein after the network side device receives the CSI report reported by the terminal, the method further comprises: When the CSI report does not include the at least one second-category PMI information, the network side device determines that the second-category PMI information acquired by the terminal is obtained based on the first-category PMI information in the CSI report that is most recently fed back by the terminal and includes the first-category PMI information. The method according to claim 34, wherein the most recently fed back CSI report comprises at least one of the following: The most recently reported CSI report among all CSI reports associated with the same CSI report settings as the currently reported CSI report; The most recently reported CSI report among all CSI reports associated with a second CSI reporting setting, wherein the second CSI reporting setting is the CSI reporting setting associated with the first CSI reporting setting associated with the currently reported CSI report; The most recently reported CSI report among all CSI reports associated with a third CSI report setting, wherein the third CSI setting is a CSI report setting associated with the same object as the first CSI report setting associated with the currently reported CSI report, wherein the object includes one of the following: a serving cell, a carrier, and a reference signal. A channel state information reporting device, comprising: A determination module, configured to determine a channel state information CSI report; A reporting module, used to report the CSI report to a network side device; The CSI report is associated with at least one of the following: At least one first type precoding matrix indicates PMI information; at least one second type of PMI information; The second type of PMI information is obtained based on the first type of PMI information. A device for acquiring channel state information, comprising: A receiving module, configured to receive a CSI report reported by a terminal, wherein the CSI report is associated with at least one of the following: at least one first type of precoding matrix indication PMI information; at least one second type of PMI information; the second type of PMI information is obtained based on the first type of PMI information; The acquisition module is used to acquire at least one of the following based on the CSI report: at least one first type of precoding matrix indication PMI information; at least one second type of PMI information. A terminal comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method for reporting channel state information as described in any one of claims 1 to 23 are implemented. A network side device comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method for obtaining channel state information as described in any one of claims 24 to 35 are implemented. A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor, implements the method for reporting channel state information as described in any one of claims 1 to 23, or implements the steps of the method for obtaining channel state information as described in any one of claims 24 to 35.