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

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 equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] 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

[0003] 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

[0004] The Channel State Information (CSI) architecture can be divided into downlink CSI and uplink CSI. Downlink CSI includes the downlink physical channel used for data transmission and the downlink reference signal used for channel estimation to obtain downlink CSI. Uplink CSI includes the uplink physical channel used for data transmission and the uplink reference signal used for channel estimation to obtain uplink CSI. In 5th Generation (5G) communication systems, CSI is mainly used in adaptive beamforming and multiple-input multiple-output (MIMO) technologies to improve wireless transmission bandwidth and reliability.

[0005] Typically, the terminal can determine the CSI report through high-layer 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-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, thereby obtaining the corresponding CSI information based on the codebook configuration information and CSI report content associated with the CSI report configuration, and provides feedback based on the uplink channel.

[0006] However, with the related CSI architecture, the CSI report fed back by the terminal cannot be associated with purposes other than those defined by the standard, or the CSI report fed back by the terminal cannot be associated with PMI information for multiple purposes, thereby making it impossible for the network-side device to obtain CSI reports associated with PMI information for other purposes or multiple purposes.

[0007] Summary of the Invention

[0008] 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.

[0009] In a first aspect, a method for reporting channel state information is provided, the method comprising: a terminal determining a CSI report; 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 first-type precoding matrix indication PMI information; at least one second-type PMI information; the second-type PMI information is obtained based on the first-type PMI information.

[0010] In a second aspect, a method for obtaining channel state information is provided, the method comprising: a network side device receiving 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.

[0011] In a third aspect, a channel state information reporting device is provided, which includes: a determination module for determining a channel state information CSI report; a reporting module for 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 first type of precoding matrix indication PMI information; the second type of PMI information is obtained based on the first type of PMI information.

[0012] In a fourth aspect, a device for acquiring channel state information is provided, which includes: a receiving module for receiving 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 precoding matrix indication PMI information; at least one second-type PMI information; the second-type PMI information is obtained based on the first-type PMI information; an acquisition module for acquiring at least one of the following based on the CSI report: at least one first-type precoding matrix indication PMI information; at least one second-type PMI information.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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 programs 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.

[0018] In the tenth aspect, a computer program / program product is provided, which is stored in a storage medium and 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.

[0019] 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

[0020] FIG1 shows a block diagram of a wireless communication system to which embodiments of the present application may be applied;

[0021] 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;

[0022] 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;

[0023] FIG4 is a schematic flow chart showing another method for acquiring channel state information provided in an embodiment of the present application;

[0024] FIG5 shows a schematic structural diagram of a channel state information reporting device provided in an embodiment of the present application;

[0025] FIG6 shows a schematic structural diagram of a channel state information reporting device provided in an embodiment of the present application;

[0026] FIG7 shows a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0027] FIG8 is a schematic diagram showing the hardware structure of a terminal provided in an embodiment of the present application;

[0028] FIG9 shows a schematic diagram of the hardware structure of a network-side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0030] The terms "first", "second", etc. in this 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 the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0031] The term "indication" in this application can be either 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, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0032] 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 technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0033] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may 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 (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or 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 (WLAN) access point (AS) or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0034] The core network equipment may include but is not limited to at least one of the following: core network node, core network function, mobility management entity (MME), access mobility management function (AMF), session management function (SMF), user plane function (UPF), policy control function (PCF), policy and charging rules function unit (PCRF), edge application service discovery function (EASDF), unified data management (UDM), unified data repository (UDR), home user server (HSS), centralized network configuration (CNC), network storage function (NRF), network exposure function (NEF), local NEF (L-NEF), binding support function (BSF), application function ( It should be noted that in the embodiments of the present application, only the core network device in the NR system is introduced as an example, and the specific type of the core network device is not limited.

[0035] The following, in conjunction with the accompanying drawings, describes in detail the channel state information reporting method, acquisition method, terminal and network side device provided in the embodiments of the present application through some embodiments and their application scenarios.

[0036] Step 202: The terminal determines a channel state information (CSI) report.

[0037] Step 204: The terminal reports the CSI report to a network-side device.

[0038] In this embodiment of the present application, the CSI report is associated with at least one of the following:

[0039] (1) at least one first type of precoding matrix indicator (PMI) information;

[0040] (2) at least one second type of PMI information;

[0041] For example, a CSI report may be associated with at least one first-category PMI information, such as at least one first-category precoding matrix indication PMI information. Alternatively, a CSI report may be associated with at least one first-category PMI information and at least one second-category PMI information, such as a CSI report including at least one first-category precoding matrix indication PMI information and at least one second-category PMI information, or a CSI report including at least one second-category precoding matrix indication PMI information. In this case, the at least one first-category PMI information associated with the CSI report is obtained based on other CSI reports.

[0042] In the embodiment of the present application, optionally, the first-category PMI information and the second-category PMI information have different uses.

[0043] The differences in the uses of the first and second types of PMI information include but are not limited to the following:

[0044] (1) The modules or nodes of the first and second types of PMI information in the communication processing flow are different;

[0045] (2) The first type of PMI information is used for analog beamforming, and the second type of PMI information is used for digital beamforming;

[0046] (3) The first type of PMI information acts on analog devices, and the second type of PMI information acts on digital baseband signal processing;

[0047] (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.

[0048] (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;

[0049] (6) The baseband signal is first processed jointly or mixed with the second-type PMI information and the first-type PMI information, and then radiated through the antenna;

[0050] (7) The first type of PMI information and the second type of PMI information are associated with different codebooks or different codebook types;

[0051] (8) The first type of PMI information maps the data symbols or reference signals output by multiple TRX chains to multiple antennas, 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.

[0052] 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 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.

[0053] In an embodiment of the present application, the second type of PMI information may 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 acquires an equivalent channel based on the estimated or acquired channel and the acquired first type of PMI information, and acquires the second type of PMI information based on the equivalent channel.

[0054] 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.

[0055] In this embodiment of the present application, the first-category PMI information may include one of the following:

[0056] (1) A first-category PMI; in this implementation, a 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, antenna subarrays, or virtual antenna subarrays for transmission.

[0057] [Corrected 12.08.2024 according to 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 based on at least one first-class PMI part that constitutes 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 Then the first type PMI can include 2 first type PMI parts, namely W APMI1 and W APMI2 , that is, a first-class PMI is composed of W APMI1 and W APMI2 Optionally, in one implementation, a first-type PMI part indicates that a data symbol or reference signal output by a TRX chain is mapped to at least one antenna, antenna subarray, or virtual antenna subarray for transmission.

[0058] [Corrected 12.08.2024 in accordance with Rule 26][Deleted]

[0059] 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 precoding matrix indication PMI information; at least one second-type PMI information; the first-type PMI information and the second-type PMI information have different uses, for example, the first-type PMI information is used for analog beamforming, and the second-type 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.

[0060] In one implementation, before the terminal determines the CSI report in step 202, the method may further include: the terminal determining, according to higher layer signaling, one of the following:

[0061] (1) The CSI report is associated with the first type of PMI information;

[0062] (2) The CSI report associates the first-category PMI information with the second-category PMI information.

[0063] 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 the 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.

[0064] [Corrected 12.08.2024 according to Rule 26] In one implementation, in the process of determining the CSI report in step 202, the terminal may determine the number of first-category PMI information associated with the CSI report through network signaling, or may determine the number of first-category PMI information associated with the CSI report according to its own policy, and indicate the number of first-category PMI information associated with the CSI report to the network-side device.

[0065] [Corrected 12.08.2024 according to Rule 26] For example, assuming the codebook structure is Then the number of the first type PMI represents W APMI1 and / or W APMI2 The number of optional W APMI1 and W APMI2 The terminal can determine W based on network signaling. APMI1 and / or W APMI2 The terminal can also determine the number of first-category PMIs to be fed back and indicate it to the network side device. For example, the terminal indicates to the network the number of W PMIs fed back by the terminal. APMI1 and / or W APMI2 The number of. Among them, in W APMI1 and W APMI2 Similarly, at this time, the terminal only needs to indicate W to the network side device APMI1 or W APMI2 The quantity is sufficient.

[0066] [Corrected 12.08.2024 according to Rule 26] For another example, in the case where the first-category PMI information includes a first-category PMI part, for the above codebook structure, the W of the first-category PMI APMI1 or W APMI2 It can usually be divided into multiple sub-matrices. APMI1 or W APMI2Each submatrix is ​​a first-class PMI part. Typically, each submatrix is ​​associated with one reference signal or multiple reference signals or a portion of a reference signal port or an antenna subarray, without limitation. Therefore, the first-class PMI is composed of at least one first-class PMI part. Furthermore, the terminal obtains the number of submatrices indicated by the network based on high-level signaling or reference signal configuration. Furthermore, optionally, the terminal determines the number of first-class PMI parts associated with each submatrix based on the network high-level signaling indication. Alternatively, the terminal optionally indicates to the network the number of first-class PMI parts associated with each submatrix fed back by the terminal.

[0067] [Corrected 12.08.2024 according to Rule 26] For example, suppose the network indicates that a first-category PMI The first type of PMI is W APMI1-1 or W APMI1-2 , which is usually a vector. The terminal determines the first type of PMI part W associated with the first diagonal block (sub-matrix) according to the network signaling APMI1-1 The number of the first-class PMI part associated with the second diagonal block is N1. APMI1-2 If the number of first-category PMIs is N2, then the terminal can generally determine N1*N2 first-category PMIs. Furthermore, the terminal can optionally select a portion of the first-category PMIs and feed them back to the network. Alternatively, the terminal can feed back N1+N2 first-category PMIs, and the network-side device can obtain and use the corresponding first-category PMI based on the first-category PMI portion.

[0068] Alternatively, the terminal feeds back N1 and N2 to the network (not a network signaling configuration), indicating that the first diagonal block (submatrix) is associated with N1 first-category PMI parts W APMI1-1 N2 first-category PMI parts are associated with the second diagonal block, and are used by the network to obtain the number of first-category PMI parts fed back by the terminal.

[0069] In one implementation, the terminal determines the CSI report in step 202, which may further include at least one of the following:

[0070] (1) The terminal determines, based on first network signaling, an acquisition range for each piece of first-category PMI information, where the first network signaling is used to indicate the acquisition ranges of multiple pieces of first-category PMI information. For example, the first network signaling indicates one or more values, and the terminal determines the acquisition range based on the one or more values; or for another example, the first network signaling indicates one or more bit sequences, and the terminal determines the acquisition range based on the bit sequences.

[0071] Optionally, the terminal can 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 is fed back), 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.

[0072] [Corrected on 12.08.2024 according to 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. In this case, 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 an 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 some first-class PMI parts, thereby reducing the feedback overhead and complexity.

[0073] [Corrected 12.08.2024 according to Rule 26] For example, suppose the network side device indicates a first type PMI Among them, the first type of PMI is W PPMI1-1 or W PPMI1-2 , and is usually a vector. The terminal determines the associated W obtained or fed back by the terminal according to the first network signaling APMI1-1 and W APMI1-2 The beam spacing between the first type of PMI parts does not exceed a threshold value, 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 network signaling. APMI1 When feedback W PPMI1-1 The associated first-category PMI part and W APMI1-2 The first-class PMI part of the association is relative to W APMI1-1 Therefore, when there are multiple first-category PMIs, the feedback overhead is reduced.

[0074] (2) The terminal determines an interval range between multiple pieces of 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 first-category PMI information.

[0075] Optionally, the terminal can select at least one of the first-category PMI information associated with the CSI report based on the second network signaling, wherein, for the other first-category PMI information except the reference first-category PMI information in the selected at least one 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. The second indication information is fed back in the CSI report, and 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. The feedback overhead of the second indication information is determined based on the size of the interval range associated with the second network signaling.

[0076] [Corrected on 12.08.2024 according to 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.

[0077] [Corrected 12.08.2024 according to Rule 26] For example, suppose the network equipment indicates a first-class PMI The first type of PMI is W APMI1-1 or W APMI1-2 , which is usually a vector. The terminal determines the feedback W according to the second network signaling APMI1-1 The number of associated first-category PMI parts is N1, where N1 is an integer. At the same time, it is determined that the beam spacing between multiple first-category PMI parts obtained or fed back by the terminal does not exceed a threshold value. The beam spacing can be a sequence number difference, an angle difference, or an index difference, and the threshold value is a threshold value indicated by network signaling. In this case, the terminal only needs to feed back a reference first-category PMI part and the beam spacings of N1-1 first-category PMI parts other than the reference first-category PMI part relative to the reference, thereby reducing feedback overhead.

[0078] [Corrected 12.08.2024 according to Rule 26] For another example, suppose the network indicates a first-class PMI The first type of PMI is W APMI1-1 or W APMI1-2 , which is usually a vector. The terminal determines the feedback W according to the second network signaling APMI1-2 The number of associated first-category PMI parts is N2, where N2 is an integer. At the same time, it is determined that the beam spacing between multiple first-category PMI parts obtained or fed back by the terminal does not exceed a threshold value. The beam spacing can be a sequence number difference, an angle difference, or an index difference, and the threshold value is a threshold value indicated by network signaling. In this case, the terminal only needs to feed back a reference first-category PMI part and the beam spacings of N2-1 first-category PMI parts other than the reference first-category PMI part relative to the reference, thereby reducing feedback overhead.

[0079] [Corrected 12.08.2024 according to Rule 26] For another example, suppose the network indicates a first-class PMI The first type of PMI is W APMI1-1 or W APMI1-2 , which is usually a vector. The terminal determines the feedback W according to the second network signaling APMI1-1 The number of the associated first-class PMI parts is N1, which determines the feedback W APMI1-2 The number of associated first-category PMI parts 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-category PMI parts obtained or fed back by the terminal does not exceed a threshold value. The beam spacing can be a sequence number difference, an angle difference, or an index difference, and the threshold value is a threshold value indicated by network signaling. At this time, the terminal feeds back a reference first-category PMI part (associated W APMI1-1 or W APMI1-2 ) and the beam spacing of the first type PMI part other than the reference first type PMI part relative to the reference first type PMI part, thereby reducing the feedback overhead.

[0080] 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. 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.

[0081] For example, the network side device configures multiple reference signals to obtain multiple first-type PMIs W APMI , where the first type of 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-category PMI information obtained or fed back by the terminal does not exceed a threshold value (i.e., the above-mentioned interval range). The beam spacing can be a sequence number difference, angle difference, or index difference. The threshold value can be a threshold value indicated by the network signaling. At this time, the terminal feeds back a reference W APMI and other W APMI W relative to the reference APMI The beam spacing is sufficient, thus reducing the feedback overhead.

[0082] 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 the first-class PMI or the 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.

[0083] In one implementation, the terminal determines the CSI report in step 202, which may further include:

[0084] Step 2021: The terminal determines reference first-category PMI information in at least one of the first-category PMI information;

[0085] Step 2023: For at least one first-category PMI information associated with the CSI report, excluding the reference first-category PMI information, the terminal feeds back in the CSI report an offset of the first-category PMI information relative to the reference first-category PMI information.

[0086] Optionally, the offset is associated with at least one of the following: sequence number difference, angle difference, index difference, and 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, an identifier corresponding to each sequence number difference 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 the reference first-category PMI information may be pre-set to 0, the identifier corresponding to the sequence number difference of -1 with the reference first-category PMI information may be pre-set to 1, the identifier corresponding to the sequence number difference of 1 with the reference first-category PMI information may be pre-set to 2, and the identifier corresponding to the sequence number difference of 2 with the reference first-category PMI information may be pre-set to 3. If 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 an identifier of "2".

[0087] The reference first-category PMI information may be one of the following among at least one first-category PMI information:

[0088] 1) The first-category PMI information with the smallest associated reference signal port number;

[0089] 2) the first type of PMI information associated with the first configured reference signal;

[0090] 3) the first type of PMI information associated with the port with the smallest port number of the first configured reference signal;

[0091] 4) the first first-category PMI information among the at least one first-category PMI information fed back by the terminal;

[0092] 5) one first-category PMI information among the at least one first-category PMI information indicated by the terminal;

[0093] 6)Others.

[0094] 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 through the obtained 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 through the obtained reference first-class PMI and the offset.

[0095] In one implementation, the CSI report may also include or be associated with a target value, wherein 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.

[0096] 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 may include identification information of the target value. For example, the index corresponding to each candidate target value may be pre-set, and the actual index of the target value may be included in the CSI report, thereby reducing feedback overhead of the target value.

[0097] The predetermined value associated with the first-category PMI information may include at least one of the following associated with the first-category 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 indicate power information or energy information associated with the first-category PMI or a portion of the first-category PMI.

[0098] Optionally, when the target value includes the second value, at least one second value in the CSI report is associated with one first value.

[0099] 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 device the power information or energy information of the first type of PMI or the first type of PMI portion associated with the CSI report. The network device can determine the strength of the first type of PMI or the first type of PMI portion based on the at least one first value or the at least one second value, so that the network device can select or update the first type of PMI or the first type of PMI portion. 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. 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 portion, that is, the terminal needs to consider the first type of PMI or the first type of PMI portion associated with the first value when obtaining the first value.

[0100] For example, the first value is RSRP or associated RSRP, where RSRP is defined as the linear average of the power contributions (in watts (W)) of all or part of the resource elements (REs) of all or part of the antenna ports of the reference signal 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.

[0101] 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.

[0102] The second value is a differential value 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, i.e., the CSI report may not include a differential value.

[0103] 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, where 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.

[0104] In an optional implementation, the CSI report may include: at least one second value and one first value, where the first value is one of multiple third values ​​associated with the first-type PMI information, and the at least one second value is the difference between the first value and each third value among the multiple third values ​​excluding 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 the difference between the first value and each third value among the multiple third values ​​excluding the first value, thereby further reducing the feedback overhead of the target value.

[0105] In one optional manner, the second value is associated with a difference between a third value other than the specified value in the multiple 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.

[0106] In one embodiment, when a CSI report is associated with a first-category PMI, the CSI report also includes or is associated with at least one first value and at least one second value. 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 first value is the strongest or largest third value among multiple third values ​​associated with multiple first-category PMIs or multiple first-category PMI portions. 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 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 device to determine the order in which the first and second values ​​correspond to the measurement resources or measurement resource ports. 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-category PMI or the first-category PMI portion, i.e., the terminal needs to consider the first-category PMI or the first-category PMI portion associated with the third value when obtaining the third value.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] For example, if a CSI report includes or is associated with four first-category PMIs, the terminal can obtain four third values, such as RSRP, where the calculation of each RSRP needs to take into account the corresponding first-category PMI (i.e., multiplying the first-category 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 third values ​​other than the first value and the first value. Since the third values ​​other than the first value are less than or equal to the first value, the second value can optionally be less than or equal to 0.

[0111] 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 the measurement resource information or measurement resource port information associated with the at least one first value to the network 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 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.

[0112] The second value is a difference between a third value other than the 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 second value is the number of first-category PMIs or first-category PMI parts included or associated in the CSI report.

[0113] For example, if a CSI report includes or is associated with four first-type PMIs, the terminal can obtain four third values, such as RSRP, where the calculation of each RSRP needs to take into account the corresponding first-type PMI (that is, the first-type PMI is multiplied 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.

[0114] 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.

[0115] In one implementation, when the target value includes the second value, the method further includes:

[0116] Step 1: The terminal obtains multiple third values ​​associated with multiple pieces of the first-category PMI information;

[0117] In step 2, the terminal obtains the at least one second value, where 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. That is, in this implementation, the CSI report may include: at least one second value and one first value, where the at least one second value includes the difference between each of multiple third values ​​associated with the first type of PMI information and the first value.

[0118] The third value may also be obtained through or by utilizing the first type of PMI information.

[0119] In one embodiment, when a CSI report is associated with a first-category PMI, the CSI report also includes or is associated with at least one first value and at least one second value, where 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 values ​​are associated with the first-category PMI or first-category PMI portion in a certain order, i.e., the number of second values ​​is the same as the number of first-category PMI or first-category PMI portions included in the CSI report.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] For example, the first value is a conventional RSRP or an associated conventional RSRP, where RSRP is defined as the linear average of the 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 occasion. Optionally, the second value is associated with the first value and is an RSRP differential value relative to the first value.

[0124] For another example, the first value is a conventional SINR or an associated conventional SINR, where 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.

[0125] 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 first-category PMI information associated with the CSI report. Since the first value may not be associated with any first-category PMI or first-category 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-category PMI or first-category PMI parts included or associated in the CSI report.

[0126] For example, if a CSI report includes or is associated with four first-type PMIs, the terminal can obtain four third values, such as RSRP, where the calculation of each RSRP needs to take into account the corresponding first-type PMI (that is, the first-type PMI is multiplied by the channel obtained by the corresponding reference signal port). The first value is the L1-RSRP value obtained by the terminal based on the reference signal or reference signal port, and the second value is associated with the difference between the third value and the first value. Therefore, the terminal feeds back four second values ​​and one first value.

[0127] In one implementation, when at least one second-category PMI information is associated with a CSI report, the terminal determining the CSI report in step 202 may include:

[0128] The terminal determines, according to one of the following, the amount of the second-category PMI information associated with the CSI report:

[0129] (1) Third network signaling;

[0130] (2) default rules;

[0131] (3) The number of the first type of PMI information.

[0132] 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.

[0133] In one implementation, to reduce feedback overhead of the second-type PMI information, multiple pieces of the second-type PMI information share at least one of the following indications:

[0134] (1) Spatial basis vector indication;

[0135] (2) Spatial basis vector group indication;

[0136] (3) Frequency domain basis vector indication;

[0137] (4) Frequency domain basis vector group indication;

[0138] (5) non-zero coefficient indication;

[0139] (6) Strongest coefficient indication;

[0140] (7) rank indication;

[0141] (8) Reference signal port indication;

[0142] (9) Indication of the number of non-zero coefficients.

[0143] In the embodiment of the present application, at least one indication from (1) to (9) 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.

[0144] In one implementation, the CSI report includes 1 reference spatial base vector indication and (N-1) spatial base vector indications and offsets relative to the reference spatial base vector indication, where N is the number of second-type PMI information associated with the CSI report.

[0145] For example, when the second-category PMI information is associated with the Type 1 codebook, if N second-category PMI information is associated, a reference second-category PMI information is fed back, and for the other N-1 second-category PMI information, the terminal feeds back its spatial basis vector offset relative to the reference second-category PMI information, thereby reducing feedback overhead. Further, optionally, the reference second-category PMI information can be associated with a default first-category PMI information, or the reference second-category PMI information can be associated with a first-category PMI information indicated by the terminal.

[0146] 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.

[0147] In one implementation, when there are multiple pieces of second-category PMI information, the first part of the CSI report further includes: multiple non-zero coefficient number indicators, where each non-zero coefficient number indicator is associated with one piece of second-category PMI information. In this implementation, the number of non-zero coefficients included in each piece of second-category PMI information may be indicated by one non-zero coefficient number indicator, and the network-side device may determine the size of the second part of the CSI report based on the multiple non-zero coefficient number indicators.

[0148] Optionally, when there are multiple pieces of second-category PMI information, the first part of the CSI report further includes: one non-zero coefficient number indicator associated with the multiple pieces of second-category PMI information. In this optional implementation, the number of non-zero coefficients indicated by the non-zero coefficient number indicator is the sum of the numbers of non-zero coefficients of the multiple pieces of second-category PMI information. That is, in this optional implementation, one non-zero coefficient number indicator is used to indicate the sum of the numbers of non-zero coefficients of the multiple pieces of second-category PMI information.

[0149] In one implementation, when at least one second-category PMI information is associated with a CSI report, the CSI report further includes one of the following:

[0150] (1) Includes only a wideband channel quality indicator (CQI);

[0151] (2) including N wideband CQIs, where N is the number of second-type PMI information associated with the CSI report;

[0152] (3) Includes only one wideband CQI and multiple subband CQIs;

[0153] (4) It includes N wideband CQIs and multiple sub-band CQIs, each of the N wideband CQIs is independently obtained, and N is the number of second-type PMI information associated with the CSI report.

[0154] 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; alternatively, the terminal may also obtain a broadband CQI for each second-category PMI information through network indication or protocol agreement; alternatively, the terminal may also obtain a broadband CQI and multiple subband CQIs through network indication or protocol agreement, wherein one broadband CQI is associated with all second-category PMI information, and one subband CQI is associated with one second-category PMI information; alternatively, the terminal may also obtain N broadband CQIs and multiple subband CQIs through network indication or protocol agreement, wherein one broadband CQI is associated with one second-category PMI information, and one subband CQI is associated with one second-category PMI information. Further, the N broadband CQIs are obtained according to their respective associated second-category PMI information, that is, they are obtained independently.

[0155] 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 adapt to different needs.

[0156] In one implementation, 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 CSI report only feeds back the at least one second-type PMI information, indicating that the at least one second-type PMI information is obtained based on the first-type PMI information in the most recently fed-back CSI report that includes the first-type PMI information.

[0157] 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 can 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.

[0158] Optionally, the most recently fed back CSI report includes at least one of the following:

[0159] (1) The most recently reported CSI report among all CSI reports associated with the same CSI report settings as the currently reported CSI report;

[0160] (2) associating the most recently reported CSI report among all CSI reports of a second CSI reporting setting, where the second CSI setting is the CSI reporting setting associated with the first CSI reporting setting associated with the currently reported CSI report;

[0161] (3) The most recently reported CSI report among all CSI reports associated with a third CSI reporting setting, wherein the third CSI reporting setting is a CSI reporting setting associated with the same serving cell, carrier, or reference signal as the first CSI reporting setting associated with the currently reported CSI report.

[0162] For example, in a CSI report setting of one period, when the associated PMI information includes the first category PMI information and the 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 the 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 CSI report.

[0163] For example, if a periodic CSI report is configured and the associated PMI information includes both first-category PMI information and 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 in the most recently fed-back CSI report, the terminal may 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 in the CSI report is obtained based on the first-category PMI information in the strongest fed-back CSI report.

[0164] In an embodiment of the present application, for PMI information associated with a CSI report, that is, including both first-category PMI information and second-category PMI information, the terminal may, through network configuration or terminal selection, only feedback the second-category PMI information. In this case, the terminal assumes that at least one first-category PMI information among the at least one first-category PMI information and the at least one second-category PMI information associated with the current CSI report is consistent with the first-category PMI information associated with the most recently fed-back CSI report. In this case, for the current CSI report, the terminal does not feedback the first-category PMI information, but only feedback the second-category PMI information, thereby reducing the feedback overhead of the current CSI report. Alternatively, the terminal may indicate to the network that the current CSI report does not include the first-category PMI information, and the network may determine the size of the CSI report based on this indication and, in addition, determine the at least one first-category PMI information associated with the CSI report according to the aforementioned rules.

[0165] FIG3 shows a 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.

[0166] Step 302: The network-side device receives a CSI report reported by the terminal, where the CSI report is associated with at least one of the following:

[0167] (1) at least one first-type precoding matrix indicating PMI information;

[0168] (2) at least one second type of PMI information;

[0169] The second-category PMI information is obtained based on the first-category PMI information.

[0170] Optionally, the first-category PMI information and the second-category PMI information have different uses.

[0171] The terminal may report the CSI report according to the method shown in FIG. 2 . For details, please refer to the above related description, which will not be repeated here.

[0172] In an embodiment of the present application, the network side device determines the CSI report through the receiving terminal and reports the CSI report, and 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; 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.

[0173] 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:

[0174] (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;

[0175] (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;

[0176] (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;

[0177] (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 PMI information associated with the CSI report.

[0178] In an embodiment of the present application, the network-side device sends high-layer signaling to the terminal, so that the terminal can determine, based on the high-layer signaling, that the CSI report is associated with the first-category PMI information, or that the CSI report is associated with the first-category PMI information and the second-category PMI information. The network-side device sends a first network signaling to the terminal, so that the terminal can determine, based on the first network signaling, the acquisition range of each piece of the first-category PMI information. The network-side device sends a second network signaling to the terminal, so that the terminal can determine, based on the second network signaling, the interval range between multiple pieces of the first-category PMI information. The network-side device sends a third network signaling to the terminal, so that the terminal can determine, based on the third network signaling, the number of pieces of the second-category PMI information associated with the CSI report.

[0179] Optionally, the first-category PMI information includes one of the following:

[0180] (1) a Category 1 PMI;

[0181] (2) A first-category PMI part, wherein the first-category PMI is composed of at least one first-category PMI part.

[0182] 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.

[0183] Optionally, the offset is associated with at least one of the following: sequence number difference, angle difference, index difference, and phase difference.

[0184] 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 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.

[0185] 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 power information or energy information associated with the first type of PMI information.

[0186] Optionally, when the target value includes the second value, at least one second value in the CSI report is associated with one first value.

[0187] Optionally, 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.

[0188] Optionally, the CSI report includes the first value, 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.

[0189] 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: the maximum value among the multiple third values, the strongest value among the multiple third values, or any one of the multiple third values.

[0190] Optionally, the second value is associated with a difference between the first value and a third value other than the specified value among 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.

[0191] FIG4 shows that in one implementation, after the network-side device receives the CSI report reported by the terminal in step 302, the method may further include:

[0192] In 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 was 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 was 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 currently fed back by the terminal is the first-category PMI information most recently fed back.

[0193] Optionally, the most recently fed back CSI report includes at least one of the following:

[0194] (1) The most recently reported CSI report among all CSI reports associated with the same CSI report settings as the currently reported CSI report;

[0195] (2) associating the most recently reported CSI report among all CSI reports of a second CSI reporting setting, where the second CSI setting is the CSI reporting setting associated with the first CSI reporting setting associated with the currently reported CSI report;

[0196] (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.

[0197] 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 used as an example to illustrate the channel state information reporting device provided in the embodiment of the present application.

[0198] 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 .

[0199] The determining module 51 is configured to determine a channel state information (CSI) report; and the reporting module 52 is configured to report the CSI report to a network-side device. The CSI report is associated with at least one of the following:

[0200] (1) at least one first-type precoding matrix indicating PMI information;

[0201] (2) at least one second type of PMI information;

[0202] The second-category PMI information is obtained based on the first-category PMI information.

[0203] In one implementation, the determining module 51 is further configured to determine, according to the higher layer signaling, one of the following:

[0204] (1) The CSI report is associated with the first type of PMI information;

[0205] (2) The CSI report associates the first-category PMI information with the second-category PMI information.

[0206] In one implementation, the determination module 51 may also be used for at least one of the following:

[0207] (1) determining, according to first network signaling, an acquisition range of each first-category PMI information, wherein the first network signaling is used to indicate the acquisition range of multiple first-category PMI information;

[0208] (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.

[0209] In one implementation, the determination module 51 may also be used for at least one of the following:

[0210] (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;

[0211] (2) According to the second network signaling, at least one 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 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.

[0212] In one implementation, the first-category PMI information includes one of the following:

[0213] (1) a Category 1 PMI;

[0214] (2) A first-category PMI part, wherein the first-category PMI is composed of at least one first-category PMI part.

[0215] In one implementation, the above-mentioned determination module 51 can also be used to: determine the 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.

[0216] 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.

[0217] In one implementation, the CSI report also includes or is associated with a target value, the target value including 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.

[0218] In one implementation, when the target value includes the second value, at least one second value in the CSI report is associated with one first value.

[0219] In one 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.

[0220] 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.

[0221] In one implementation, the second value is associated with a difference between a third value other than the designated value in the plurality of third values ​​and the first value.

[0222] 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.

[0223] In one implementation, when the target value includes the second value, the above-mentioned device 500 may further include an acquisition module for acquiring multiple third values ​​associated with multiple first-type PMI information; acquiring the 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.

[0224] In one implementation, the third value is obtained by or using the first type of PMI information.

[0225] 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.

[0226] In one implementation, the determining module 51 may be configured to determine the amount of the second-category PMI information associated with the CSI report according to one of the following:

[0227] (1) Third network signaling;

[0228] (2) default rules;

[0229] (3) The number of the first type of PMI information.

[0230] In one implementation, at least one of the following indications is shared among the plurality of second-category PMI information:

[0231] (1) Spatial basis vector indication;

[0232] (2) Spatial basis vector group indication;

[0233] (3) Frequency domain basis vector indication;

[0234] (4) Frequency domain basis vector group indication;

[0235] (5) non-zero coefficient indication;

[0236] (6) Strongest coefficient indication;

[0237] (7) rank indication;

[0238] (8) Reference signal port indication;

[0239] (9) Indication of the number of non-zero coefficients.

[0240] In one implementation, the CSI report includes: 1 reference spatial base vector indication and (N-1) spatial base vector indications and offsets relative to the reference spatial base vector indication, where N is the number of second-type PMI information associated with the CSI report.

[0241] In one implementation, when there are multiple pieces of the second-type 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 piece of the second-type PMI information.

[0242] In one implementation, when there are multiple pieces of the second-type PMI information, the first part of the CSI report further includes: an indication of the number of non-zero coefficients associated with the multiple pieces of the second-type PMI information.

[0243] In one implementation, the CSI report further includes one of the following:

[0244] (1) Includes only one wideband channel quality indicator (CQI);

[0245] (2) including N wideband CQIs, where N is the number of second-type PMI information associated with the CSI report;

[0246] (3) Includes only one wideband CQI and multiple subband CQIs;

[0247] (4) It includes N wideband CQIs and multiple sub-band CQIs, each of the N wideband CQIs is independently obtained, and N is the number of second-type PMI information associated with the CSI report.

[0248] In one implementation, 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 CSI report only feeds back the at least one second-type PMI information, indicating that the at least one second-type PMI information is obtained based on the first-type PMI information in the most recently fed-back CSI report that includes the first-type PMI information.

[0249] In one implementation, the most recently fed back CSI report includes at least one of the following:

[0250] (1) The most recently reported CSI report among all CSI reports associated with the same CSI report settings as the currently reported CSI report;

[0251] (2) associating the most recently reported CSI report among all CSI reports of a second CSI reporting setting, where the second CSI setting is the CSI reporting setting associated with the first CSI reporting setting associated with the currently reported CSI report;

[0252] (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.

[0253] The channel state information reporting device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can include servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0254] The channel state information reporting device provided in the embodiment of the present application can implement the various processes implemented in the method embodiment of Figure 2 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0255] 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 used as an example to illustrate the channel state information acquisition device provided in the embodiment of the present application.

[0256] 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 .

[0257] The receiving module 61 is configured to receive a CSI report reported by a terminal, wherein the CSI report is associated with at least one of the following:

[0258] (1) at least one first-type precoding matrix indicating PMI information;

[0259] (2) at least one second type of PMI information;

[0260] The second type of PMI information is obtained based on the first type of PMI information;

[0261] The acquisition module 62 is configured to acquire, based on the CSI report, at least one of the following: at least one first type of precoding matrix indicator (PMI) information; and at least one second type of PMI information.

[0262] In one implementation, as shown in FIG6 , the channel state information reporting apparatus 600 may further include a sending module 63 configured to perform at least one of the following:

[0263] (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;

[0264] (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;

[0265] (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;

[0266] (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.

[0267] In one implementation, the first-category PMI information includes one of the following:

[0268] (1) a Category 1 PMI;

[0269] (2) A first-category PMI part, wherein the first-category PMI is composed of at least one first-category PMI part.

[0270] In one implementation, the CSI report includes: 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.

[0271] In one implementation, the CSI report also includes or is associated with a target value, the target value including 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.

[0272] In one 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.

[0273] In one 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.

[0274] In one implementation, 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.

[0275] 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.

[0276] In one implementation, the second value is associated with a 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.

[0277] 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.

[0278] In one implementation, the most recently fed back CSI report includes at least one of the following:

[0279] (1) The most recently reported CSI report among all CSI reports associated with the same CSI report settings as the currently reported CSI report;

[0280] (2) associating the most recently reported CSI report among all CSI reports of a second CSI reporting setting, where the second CSI setting is the CSI reporting setting associated with the first CSI reporting setting associated with the currently reported CSI report;

[0281] (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.

[0282] The device for acquiring channel state information in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can include servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0283] The channel state information acquisition device provided in the embodiment of the present application can implement the various processes implemented in the method embodiments of Figures 3 to 4 and achieve the same technical effects. To avoid repetition, they will not be described here.

[0284] As shown in Figure 7, an embodiment of the present application further provides a communication device 700, including a processor 701 and a memory 702. 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.

[0285] The present application also provides a terminal including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG2 . This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment is applicable to this terminal embodiment and can achieve the same technical effects. Specifically, FIG8 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0286] 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 the processor 810.

[0287] Those skilled in the art will appreciate that the terminal 800 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 810 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG8 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[0288] It should be understood that in an 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 a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an 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 volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0289] In the embodiment of the present application, after receiving downlink data from a network-side device, the radio frequency unit 801 may transmit the data to the processor 810 for processing. Furthermore, the radio frequency unit 801 may send uplink data to the network-side device. Typically, 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, and the like.

[0290] 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, applications or instructions required for at least one function (such as a sound playback function, an image playback function, 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 random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM 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 memory.

[0291] Processor 810 may include one or more processing units. Optionally, processor 810 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 810.

[0292] 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.

[0293] 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 effects. To avoid repetition, it will not be described here.

[0294] The present application also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiments shown in Figures 3 and 4. This network-side device embodiment corresponds to the aforementioned network-side device method embodiment, and each implementation process and implementation method of the aforementioned method embodiment is applicable to this network-side device embodiment and can achieve the same technical effects.

[0295] Specifically, embodiments of the present application also provide 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. Antenna 91 is connected to radio frequency device 92. In the uplink direction, radio frequency device 92 receives information via antenna 91 and sends the received information to baseband device 93 for processing. In the downlink direction, baseband device 93 processes the information to be transmitted and sends it to radio frequency device 92. Radio frequency device 92 processes the received information and then sends it through antenna 91.

[0296] 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.

[0297] The baseband device 93 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 9, one of the chips is, for example, a baseband processor, which is connected to the memory 95 through a bus interface to call the program in the memory 95 and execute the network device operations shown in the above method embodiment.

[0298] The network side device may further include a network interface 96, which is, for example, a Common Public Radio Interface (CPRI).

[0299] 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 of execution of each module shown in FIG6 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0300] 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 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.

[0301] 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-transitory readable storage medium.

[0302] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run programs or instructions 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.

[0303] 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.

[0304] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product 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.

[0305] 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 described above, and the network side device can be used to execute the steps of the channel state information acquisition method described above.

[0306] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising 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 a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments 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 the opposite 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.

[0307] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0308] 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 this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. 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.

2. The method according to claim 1, wherein: Before the terminal determines the CSI report, the method further includes: 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.

3. 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.

4. 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.

5. 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.

6. 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.

7. The method according to claim 6, wherein: The offset is associated with at least one of the following: sequence number difference, angle difference, index difference, and phase difference.

8. The method according to any one of claims 1 to 5, wherein: The CSI report also includes or is associated with a target value, where 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.

9. 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 associated with one of the first values.

10. 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 a differential value associated with one of the first values.

11. The method according to claim 8, wherein: In the case where 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.

12. The method according to claim 11, wherein: The second value is associated with a difference value between the first value and a third value other than the designated value among the plurality of third values.

13. 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.

14. The method according to claim 8, wherein: In the case where the target value includes the second value, the method further includes: 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.

15. The method according to claim 14, wherein: 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 PMI information associated with the CSI report.

16. The method according to claim 1, wherein: The terminal determines a channel state information CSI report, including: 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-category PMI information.

17. The method according to claim 1, wherein: At least one of the following indications is shared among the 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; Strongest coefficient indication; rank indication; Reference signal port indication; Indicator of the number of non-zero coefficients.

18. The method according to claim 1, wherein: The CSI report includes: 1 reference spatial base vector indication and (N-1) spatial base vector indications, which are offsets relative to the reference spatial base vector indication, where N is the number of second-type PMI information associated with the CSI report.

19. The method according to claim 1, wherein: In the case that there are multiple pieces of the second-type PMI information, the first part of the CSI report further includes: multiple non-zero coefficient quantity indications, wherein each of the non-zero coefficient quantity indications is associated with one piece of the second-type PMI information.

20. The method according to claim 1, wherein: In the case that there are multiple pieces of the second-type PMI information, the first part of the CSI report also includes: 1 indication of the number of non-zero coefficients associated with the multiple pieces of the second-type PMI information.

21. The method according to claim 1, wherein: The CSI report also 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.

22. The method according to any one of claims 1 to 21, wherein: In the case where 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 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.

23. The method according to claim 22, wherein: The most recently fed back CSI report includes 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.

24. 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.

25. The method according to claim 24, wherein: Before the network side device receives the CSI report reported by the terminal, the method further includes 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.

26. 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.

27. 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.

28. The method according to any one of claims 24 to 26, wherein: The CSI report also includes or is associated with a target value, where 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.

29. 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 associated with one first value.

30. 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 a differential value associated with one of the first values.

31. The method according to claim 30, wherein: 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 PMI information associated with the CSI report.

32. The method of claim 28, wherein: In the case where 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.

33. The method of claim 32, wherein: The second value is associated with a difference between the first value and a third value other than the designated value among the plurality of 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.

34. 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 includes: 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.

35. The method of claim 34, wherein: The most recently fed back CSI report includes 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.

36. 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.

37. 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.

38. A terminal 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 channel state information reporting method as described in any one of claims 1 to 23 are implemented.

39. A network side device, 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 for obtaining channel state information as described in any one of claims 24 to 35 are implemented.

40. 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.

Images