WO2022257042A1

WO2022257042A1 - Codebook reporting method, and terminal device and network device

Info

Publication number: WO2022257042A1
Application number: PCT/CN2021/099133
Authority: WO
Inventors: 黄莹沛; 陈文洪; 史志华; 方昀
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2022-12-15
Also published as: CN117296366A

Abstract

A codebook reporting method, and a terminal device and a network device, which facilitate a reduction in codebook overheads. The method comprises: a terminal device reporting channel state information (CSI) to a network device, wherein the CSI comprises at least one piece of the following information: M frequency domain basis vectors, wherein M is a positive integer; the strongest coefficient; amplitude indication information and phase indication information of a non-zero coefficient; and a bitmap.

Description

Codebook reporting method, terminal equipment and network equipment

technical field

The embodiment of the present application relates to the communication field, and in particular to a method for reporting a codebook, a terminal device, and a network device.

Background technique

In the new radio (New Radio, NR) system, the terminal device can report channel state information (Channel State Information, CSI) to the network device, and the CSI can include frequency domain-space codebook related information, for example, frequency domain-space codebook The DFT vectors of the L spatial beams of W ₁ of the codebook, the DFT basis vectors of the M frequency domains of W _f , and the quantized

and other information, the codebook overhead is relatively large, so how to reduce the codebook overhead is an urgent problem to be solved.

Contents of the invention

The present application provides a method for reporting a codebook, a terminal device and a network device, which are beneficial to reducing codebook overhead.

In the first aspect, a method for reporting a codebook is provided, including:

The terminal device reports channel state information CSI to the network device, where the CSI includes at least one of the following information:

M frequency-domain basis vectors, wherein the M is a positive integer;

strongest coefficient;

Amplitude indication information and phase indication information of non-zero coefficients;

bitmap.

In the second aspect, a method for reporting a codebook is provided, including:

The network device receives the channel state information CSI reported by the terminal device, where the CSI includes at least one of the following information:

M frequency-domain basis vectors, wherein the M is a positive integer;

strongest coefficient;

Amplitude and phase indication information of non-zero coefficients;

bitmap.

In a third aspect, a terminal device is provided, configured to execute the method in the foregoing first aspect or various implementation manners thereof.

Specifically, the terminal device includes a functional module for executing the method in the above first aspect or its various implementation manners.

In a fourth aspect, a network device is provided, configured to execute the method in the foregoing second aspect or various implementation manners thereof.

Specifically, the network device includes a functional module for executing the method in the above second aspect or each implementation manner thereof.

In a fifth aspect, a terminal device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the above first aspect or its various implementations.

A sixth aspect provides a network device, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the above second aspect or its various implementations.

In a seventh aspect, a chip is provided for implementing any one of the above first aspect to the second aspect or the method in each implementation manner thereof.

Specifically, the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the device executes any one of the above-mentioned first to second aspects or any of the implementations thereof. method.

In an eighth aspect, there is provided a computer-readable storage medium for storing a computer program, and the computer program causes a computer to execute any one of the above-mentioned first to second aspects or the method in each implementation manner thereof.

A ninth aspect provides a computer program product, including computer program instructions, the computer program instructions cause a computer to execute any one of the above first to second aspects or the method in each implementation manner.

In a tenth aspect, a computer program is provided, which, when running on a computer, causes the computer to execute any one of the above-mentioned first to second aspects or the method in each implementation manner.

Through the above technical solution, the terminal device considers the combination of channel space and delay by reporting the frequency domain basis vector, the strongest coefficient, the magnitude indication information and phase indication information of the non-zero coefficient and the bit map to the network device distribution, which is beneficial to reduce the overhead of the codebook.

Description of drawings

FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.

Fig. 2 is a schematic interaction diagram of a codebook reporting method provided according to an embodiment of the present application.

Fig. 3 is a schematic diagram of priorities of frequency-domain basis vectors according to an embodiment of the present application.

Fig. 4 is a schematic block diagram of a terminal device provided according to an embodiment of the present application.

Fig. 5 is a schematic block diagram of a network device provided according to an embodiment of the present application.

Fig. 6 is a schematic block diagram of a communication device provided according to an embodiment of the present application.

Fig. 7 is a schematic block diagram of a chip provided according to an embodiment of the present application.

Fig. 8 is a schematic block diagram of a communication system provided according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. With regard to the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The technical solution of the embodiment of the present application can be applied to various communication systems, such as: Global System of Mobile communication (Global System of Mobile communication, GSM) system, code division multiple access (Code Division Multiple Access, CDMA) system, broadband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced long term evolution (LTE-A) system , New Radio (NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum) on unlicensed spectrum unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunications System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.

Generally speaking, the number of connections supported by traditional communication systems is limited and easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), Vehicle to Vehicle (V2V) communication, or Vehicle to everything (V2X) communication, etc. , the embodiments of the present application may also be applied to these communication systems.

Optionally, the communication system in the embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, may also be applied to a dual connectivity (Dual Connectivity, DC) scenario, and may also be applied to an independent (Standalone, SA) deployment Web scene.

Optionally, the communication system in the embodiment of the present application may be applied to an unlicensed spectrum, where the unlicensed spectrum may also be considered as a shared spectrum; or, the communication system in the embodiment of the present application may also be applied to a licensed spectrum, where, Licensed spectrum can also be considered as non-shared spectrum.

The embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, wherein the terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

The terminal device can be a station (STATION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, next-generation communication systems such as terminal devices in NR networks, or future Terminal equipment in the evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.

In this embodiment of the application, the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites) superior).

In this embodiment of the application, the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, an augmented reality (Augmented Reality, AR) terminal Equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, or wireless terminal equipment in smart home.

As an example but not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices, which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction. Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets and smart jewelry for physical sign monitoring.

In the embodiment of the present application, the network device may be a device for communicating with the mobile device, and the network device may be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA , or a base station (NodeB, NB) in WCDMA, or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and an NR network The network equipment (gNB) in the network or the network equipment in the future evolved PLMN network or the network equipment in the NTN network, etc.

As an example but not a limitation, in this embodiment of the present application, the network device may have a mobile feature, for example, the network device may be a mobile device. Optionally, the network equipment may be a satellite or a balloon station. For example, the satellite can be a low earth orbit (low earth orbit, LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous earth orbit (geosynchronous earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite. ) Satellite etc. Optionally, the network device may also be a base station installed on land, water, and other locations.

In this embodiment of the present application, the network device may provide services for a cell, and the terminal device communicates with the network device through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device ( For example, a cell corresponding to a base station), the cell may belong to a macro base station, or may belong to a base station corresponding to a small cell (Small cell), and the small cell here may include: a metro cell (Metro cell), a micro cell (Micro cell), a pico cell ( Pico cell), Femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

Exemplarily, a communication system 100 applied in this embodiment of the application is shown in FIG. 1 . The communication system 100 may include a network device 110, and the network device 110 may be a device for communicating with a terminal device 120 (or called a communication terminal, terminal). The network device 110 can provide communication coverage for a specific geographical area, and can communicate with terminal devices located in the coverage area.

FIG. 1 exemplarily shows one network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within the coverage area. This application The embodiment does not limit this.

Optionally, the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.

It should be understood that a device with a communication function in the network/system in the embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in FIG. 1 as an example, the communication equipment may include a network equipment 110 and a terminal equipment 120 with communication functions. The network equipment 110 and the terminal equipment 120 may be the specific equipment described above, and will not be repeated here. The communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

It should be understood that the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.

In the embodiment of this application, "predefinition" can be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate related information in devices (for example, including terminal devices and network devices). The implementation method is not limited. For example, pre-defined may refer to defined in the protocol.

In the embodiment of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, it may include the LTE protocol, the NR protocol, and related protocols applied in future communication systems, which is not limited in the present application.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific examples. The following related technologies may be optionally combined with the technical solutions of the embodiments of the present application as optional solutions, and all of them belong to the protection scope of the embodiments of the present application. The embodiment of the present application includes at least part of the following contents.

In order to facilitate the understanding of the technical solutions of the embodiments of the present application, related concepts of frequency domain-spatial codebooks are described below.

In release (Rel) 16, for each codebook layer, the frequency domain-spatial codebook (also called NR type (type) II codebook, or the frequency domain-spatial joint codebook) in the frequency domain The domain (each subband) is coded independently. Due to the high spatial quantization accuracy, the total feedback amount is too large. By feeding back the frequency domain-space joint codebook, the feedback amount can be greatly saved under the condition of ensuring NR performance.

The frequency domain-spatial codebook can be expressed as:

Among them, W represents the frequency domain-spatial codebook, W ₁ represents the discrete Fourier transformation (Discrete fourier transformation, DFT) vectors of 2L spatial beams (beams), and W _f represents the DFT basis vectors of M frequency domains.

represents the transpose of W _f .

Represents the weighting coefficient of the space-frequency domain DFT vector pair,

is a matrix of size 2L*M. W ₁ can be represented by 2N ₁ N ₂ *2L, N ₁ is the number of ports in the vertical direction, and N ₂ is the number of ports in the horizontal direction.

It can be represented by 2L*M, and the value of 2L is

The number of rows, M value is

the number of columns.

It can be represented by M*N ₃ , where N ₃ is the number of DFT basis vectors in the frequency domain.

When the terminal device feeds back the frequency domain-spatial codebook to the network device, the content of the channel information (such as CSI) reported to the network device includes: DFT vectors of L spatial beams of W ₁ , DFT basis of M frequency domains of W _f vector, and quantized

The network device obtains the CSI of the downlink of each layer through the product of the three.

The difference between the port selection (port selection) codebook of Rel 15 or Rel 16 and the frequency domain-space codebook is W ₁ , each column of W ₁ in the port selection (port selection) codebook contains a 1, and the rest are 0, And the corresponding L ports (ports) are selected through the sampling rate d, where d=1, 2, 3, 4.

For the uplink and downlink reciprocal channels based on Frequency-division Duplex (FDD), the network equipment obtains the statistical characteristics of the uplink space and delay through the uplink Sounding Reference Signal (SRS), and determines the spatial and frequency domain The precoding matrix or the joint precoding matrix is used to precode the Channel State Information Reference Signal (CSI-RS), and the terminal device estimates the CSI-RS to select one or more ports and report the port at the same time amplitude and phase information. For a port _xi , if the precoding W _i is used for precoding, the dimension of W _i is f×Nt, f is the size of the frequency domain precoding, and Nt is the number of antennas, which are calculated by the network device. The signal sent by the sender is

Considering the difference between the uplink and downlink channels, based on the existing codebook reporting method, the codebook overhead is relatively large. Therefore, how to reduce the codebook overhead is an urgent problem to be solved.

Based on the above problems, this application proposes a technical solution that compresses the codebook overhead and improves feedback efficiency by estimating the characteristics of the space domain and time delay (DFT transform domain) from the uplink channel Sounding Reference Signal (SRS).

FIG. 2 is a schematic interactive diagram of a method 200 for reporting a codebook according to an embodiment of the present application. As shown in FIG. 2 , the method 200 includes the following content:

S210, the terminal device reports channel state information CSI to the network device, where the CSI includes at least one of the following information:

M frequency-domain basis vectors, wherein the M is a positive integer;

strongest coefficient;

bitmap.

In some embodiments of the present application, the CSI is used by the network device to determine a codebook. That is, the CSI may include codebook related information.

In some embodiments of the present application, the M is configured by a network device, or the M may also be predefined, for example, M is determined according to a high-level parameter or a predefined parameter.

In some embodiments, the M is 1 or 2, that is, the terminal device can report one frequency domain basis vector (FD-basis) or two FD-basis to the network device.

In some embodiments, the M frequency-domain basis vectors may be indicated by indexes. For example, the CSI may include an index of each of the M frequency-domain basis vectors.

In some embodiments, the bitmap is used to determine the location of non-zero coefficients.

In some embodiments, if the number of layers (layers) of the codebook is greater than 1, the terminal device reports the same M FD-basis for different layers of the codebook, or the terminal device reports M FD-basis corresponding to each layer. That is, for different layers, the terminal device may select the same FD-basis, or may select different FD-basis.

In some embodiments of the present application, the M FD-basis may be selected from N ₃ frequency domain basis vectors, where N ₃ represents the number of precoding matrix indicator (Precoding Matrix Indicator, PMI) subbands.

For the convenience of description and illustration, the M FD-basis is recorded as

f=0, 1, L, M-1, where l represents the number of layers of the codebook.

In some embodiments of the present application, the constraint conditions satisfied by the M frequency-domain basis vectors are one or more of the following:

Constraint 1: The M frequency-domain basis vectors are continuous.

Optionally, M is equal to 2, and the constraint condition 1 can be expressed by the following formula:

or,

Optionally, the constraint condition 1 can also be expressed by the following formula:

Wherein, IntS={(S+i)mod N ₃ , i=0, 1, L, M-1}

Wherein, mod means modulus, and S is zero, or S is any integer.

As an example, the M is 2, and the two frequency domain basis vectors are {0, 1}.

Constraint 2: the M frequency-domain basis vectors are within a window with a length of N, where N represents the length of the window in which the terminal device reports the frequency-domain basis vectors. In other words, the range of FD-basis selected by the terminal device is smaller than N.

In some embodiments, the N is predefined or configured by the network device.

For example, the N is a predefined parameter, and as an example, the N=2, or N=4.

For another example, the N is determined according to a high-level parameter, for example, N={2,4}.

Optionally, M is equal to 2, and the constraint condition 2 can be expressed by the following formula:

Among them, min means to take the minimum value.

Optionally, the constraints can also be represented by the following formula:

Wherein, IntS={(S+i)mod N ₃ , i=0, 1, L, N-1}

Wherein, mod means modulus, and S is zero, or S is any integer.

As an example, the N is 4, M is 2, and the two frequency-domain basis vectors are {0,1}, {0,2} or {0,3}.

Constraint condition 3: the constraint condition satisfied by the M frequency-domain basis vectors is configured by the network device or is predefined.

For example, the constraints satisfied by the M frequency-domain basis vectors are determined according to high-level parameters or predefined parameters.

As an example, M is 2, and the M frequency-domain basis vectors satisfy the following constraints:

Wherein, the d is a high-level parameter or a predefined parameter.

In some embodiments of the present application, the frequency-domain basis vector in the M frequency-domain basis vectors

The default is 0.

In some embodiments of the present application, the terminal device may make a frequency-domain basis vector zero by cyclic shifting, for example

In some embodiments of the present application, the CSI further includes at least one of the following information:

The port index i ^* corresponding to the strongest coefficient;

The frequency-domain basis vector index f ^* corresponding to the strongest coefficient;

The terminal device reports the initial position information M _initial of the window of the frequency domain basis vector;

the index of the non-zero frequency-domain basis vector;

A first parameter a, the first parameter is determined according to the indexes of the M frequency-domain basis vectors.

In some embodiments, if the number of layers of the codebook is greater than 1, the CSI may include one i ^* , in this case, all layers of the codebook correspond to the same i ^* , or, the CSI may also include each layer corresponding to i ^* , in this case, i ^* corresponding to each layer of the codebook may be the same or different.

In some embodiments, the i ^* may be reported by log ₂ K ₁ bits, that is, the bit width of i ^* may be log ₂ K ₁ bits.

In some embodiments, if log ₂ K ₁ is not an integer, the terminal device may round up log ₂ K ₁ to obtain the bit width of i ^* .

In some embodiments, if the number of layers of the codebook is greater than 1, the CSI may include one f ^* , in this case, all layers of the codebook correspond to the same f ^* , or, the CSI may also include each layer corresponding to f ^* , in this case, f ^* corresponding to each layer of the codebook may be the same or different.

In some embodiments, the f ^* may be reported by using log ₂ M bits, that is, the bit width of f ^* may be log ₂ M bits.

In some embodiments, if log ₂ M is not an integer, the terminal device may round up log ₂ M to obtain the bit width of f ^* .

In some embodiments, the CSI may include indices of at least one set of non-zero frequency-domain basis vectors.

For example, if the number of layers of the codebook is greater than 1, all layers of the codebook correspond to the same non-zero frequency-domain basis vector index.

For another example, if the number of layers of the codebook is greater than 1, the CSI may also include indexes of a group of non-zero frequency-domain basis vectors corresponding to each layer. In this case, the indices of a group of non-zero frequency-domain basis vectors corresponding to each layer of the codebook may be the same or different.

In some embodiments, if the number of layers of the codebook is greater than 1, the CSI may include a first parameter a, in this case, all layers of the codebook correspond to the same first parameter a, or, the CSI may also be Including the first parameter a corresponding to each layer, in this case, the first parameter a corresponding to each layer of the codebook may be the same or different.

Hereinafter, the implementation manner of the CSI will be described in combination with specific embodiments.

Embodiment 1: The CSI includes i ^* and f ^*

In this case, the CSI may be reported separately for i ^* and f ^* , or jointly reported for i ^* and f ^* .

Manner 1: The terminal device reports the i ^* through log ₂ K ₁ bits, and reports the f ^* through log ₂ M bits.

Method 2: The terminal device jointly reports i ^* and f ^* through log ₂ (K ₁ M _v ) bits.

Wherein, K ₁ represents the number of ports for which the terminal device reports CSI. For example, K1 is determined according to high _- level parameters or predefined parameters.

In some embodiments, if log ₂ (K ₁ M _v ) is not an integer, the terminal device may round up log ₂ (K ₁ M _v ) to obtain the number of bits for reporting i ^* and f ^* .

Embodiment 2: the CSI includes f ^* .

In this case, the terminal device reports the f ^* through log ₂ M bits.

In some embodiments, M is 2, f ^* ∈ [0,1], the M frequency-domain basis vectors

The position according to the formula

OK, where f=0,1.

In the first and second embodiments, the terminal device reports f ^* to the network device, and the network device according to the combination formula of f ^*

Determine the index of each frequency-domain basis vector.

Embodiment 3: the CSI includes _Minitial , where the _Minitial ∈ [-M+1, L, 0].

In this case, the M frequency-domain basis vectors

index according to the formula

Sure.

In some embodiments, the terminal device reports _Minitial by using log ₂ M bits.

In the third embodiment, the M frequency-domain base vectors can satisfy the aforementioned constraint condition 1, that is, the M frequency-domain base vectors can be continuous. In this case, the terminal device reports the _Minitial and does not report the M The index of the base vector in the frequency domain, the network device combines the formula according to the _Minitial

The index of each frequency-domain basis vector can also be determined, which is beneficial to reduce the overhead of CSI.

Optionally, in the third embodiment, the M frequency-domain basis vectors may also meet other constraint conditions, and the terminal device may also report the indexes of the M frequency-domain basis vectors, which is not limited in this application.

Embodiment 4, the CSI includes _Minitial , and the _Minitial is determined according to log ₂ N′ ₃ .

In some embodiments, _N'3 is configured by the network device, or _N'3 is predefined. For example, _N'3 may be determined according to high-layer parameters or predefined parameters.

In some other embodiments, N'3 is determined according to the length N _of the window in which the terminal device reports the frequency-domain basis vector.

In some embodiments, the length N of the window of the frequency-domain basis vector is predefined, for example, N=2, or N=4.

In some embodiments, the length N of the window of the frequency-domain basis vector is determined according to a high-level parameter, for example, N={2,4}.

In some embodiments, the N'3 is determined according to the length N _of the window of the frequency-domain basis vector reported by the terminal device, including:

The _N'3 is equal to N, or,

said

Wherein, b is a parameter configured by the network device, or a predefined parameter,

Indicates rounding up.

N'3 is 2, or ₃ , as examples.

In the fourth embodiment, the M base vectors in the frequency domain may satisfy the aforementioned constraint condition 1, that is, the M base vectors in the frequency domain may be continuous. In this case, the terminal device reports the _Minitial and does not report the M The index of the base vector in the frequency domain, the network device combines the formula according to the _Minitial

Optionally, in the fourth embodiment, the M frequency-domain basis vectors may also meet other constraint conditions, and the terminal device may also report the indexes of the M frequency-domain basis vectors, which is not limited in this application.

Embodiment 5: The CSI includes an index of a non-zero frequency-domain basis vector.

In some embodiments, the index of the non-zero frequency-domain basis vector is obtained by

bit indication.

As an example, the N'3 is determined according to the length N _of the window of the frequency-domain basis vector reported by the terminal device, including:

N′ ₃ =N, or,

N′ ₃ =2N-1, or,

said

Among them, c is a parameter configured by a network device, or a predefined parameter,

Indicates rounding up.

In some embodiments, if N′ ₃ =N, and N>M, in this case, the M frequency-domain basis vectors satisfy one of the aforementioned constraint condition 1, constraint condition 2 and constraint condition 3.

For example, N′ ₃ is 4, M is 2, and the 2 FD-basis can be one of {0,1}, {0,2} and {0,3}.

It should be understood that in the fifth embodiment, if the number of layers of the codebook is greater than 1, the CSI includes a set of indices of non-zero frequency-domain basis vectors, and the indices of the set of non-zero frequency-domain basis vectors correspond to the code All layers of the codebook, or, the CSI includes indices of a set of non-zero frequency-domain basis vectors corresponding to each layer of the codebook. That is, the terminal device may report the same index of the non-zero frequency-domain basis vector for all layers of the codebook, or report the index of the corresponding non-zero frequency-domain basis vector for each layer of the codebook.

Embodiment 6: the CSI includes first parameters a and f ^* .

The network device may determine the index of the frequency-domain basis vector according to the first parameters a and f ^* .

In the sixth embodiment, the CSI may indicate the first parameters a and f ^* independently, or jointly indicate the first parameters a and f ^* .

For example, the terminal device jointly indicates the first parameter a and f ^* through log ₂ (2(N-1)) bits, or indicates the first parameter a through 1 bit, and indicates the first parameter a through log ₂ (N-1 ) bits indicate the f ^* .

In some embodiments, the M is 2, and the first parameter a is determined according to x and y, where x and y represent indexes of two frequency-domain basis vectors selected by the terminal device. Further, for example, f ^* =0 may be used to indicate that the frequency-domain basis vector index corresponding to the strongest coefficient is x, and f ^* =1 may be used to indicate that the frequency-domain basis vector index corresponding to the strongest coefficient is y.

In some embodiments, the first parameter a is determined according to the following formula:

a=|x-y|, wherein, a∈[1,N-1], N represents the length of the window in which the terminal device reports the frequency-domain basis vector, and || represents an absolute value.

In some embodiments, the frequency-domain basis vector in the M frequency-domain basis vectors

In some embodiments, when f ^* is equal to 0, the frequency-domain basis vector in the M frequency-domain basis vectors

In some embodiments, when f ^* is equal to 1, the frequency-domain basis vector in the M frequency-domain basis vectors

Alternatively,

Wherein, f ^* =0 or 1.

In the sixth embodiment, if the number of layers of the codebook is greater than 1, the CSI includes a first parameter a, or the CSI includes a first parameter a corresponding to each layer.

In the sixth embodiment, if the number of layers of the codebook is greater than 1, the CSI includes one f ^* , and the one f ^* corresponds to all layers of the codebook, or the CSI includes f ^* corresponding to each layer.

In some embodiments, if the CSI includes f ^* , the f ^* is carried in uplink control information (Uplink Control Information, UCI) part 2 (part2) group 0 (group0).

In some embodiments of the present application, the method 200 further includes:

The terminal device prioritizes the non-zero coefficients and/or the bitmap.

Therefore, in the embodiment of the present application, the terminal device prioritizes the non-zero coefficients, so that when reducing the CSI overhead by reporting part of the CSI (that is, it needs to discard part of the CSI), it can select according to the priority of the non-zero coefficients The non-zero coefficients reported in priority can reduce the impact of reporting part of the CSI on the accuracy of the codebook, that is, it is beneficial to balance the overhead of the codebook and the accuracy of the codebook.

In some embodiments, the terminal device prioritizes the non-zero coefficients and/or the bitmap, including:

The terminal device calculates the non-zero coefficients and/or the bit Figures are prioritized.

As an example, the terminal device determines the priority of the non-zero coefficient according to the following formula:

Pri(l,i,f)=2·L·v·π(f)+v·i+l

Among them, Pri(l,i,f) represents the priority of non-zero coefficients, 2·L represents the number of ports used to report CSI, where 2·L=K ₁ , l represents the number of layers of the codebook, i represents the port index, f represents the index of the frequency-domain basis vector, and v represents the rank number of the codebook.

The terminal device determines the priority π(f) of the frequency-domain basis vector according to the index of the frequency-domain basis vector.

In some embodiments, the terminal device determines the priority π(f) of the frequency domain basis vector according to the following formula:

Wherein, f represents the index of the frequency-domain basis vector, and mod represents modulus.

In some other embodiments, the terminal device determines the priority π(f) of the frequency domain basis vector according to the following formula:

π(f)=min(2 mod(ff ^* ,M), 2(M-mod(ff ^* ,M))-1)

In some other embodiments, the priority of the frequency-domain basis vector corresponding to f ^* is higher than that of the next strongest coefficient

The priority of the corresponding frequency-domain basis vector.

As an example, the terminal device determines the priority π(f) of the frequency domain basis vector according to the following formula:

π(f) = |ff ^* |, or

π(f)=mod(ff ^* ,M), or

Fig. 3 shows a schematic diagram of priorities of frequency-domain basis vectors determined in the embodiment of the present application. It can be seen from Fig. 3 that the method of determining the priority of the frequency-domain base vector according to the embodiment of the present application is equivalent to prioritizing the frequency-domain base vector corresponding to the strongest coefficient (SC) when determining the priority of the frequency-domain base vector level is determined as the highest priority. Therefore, when reporting part of the CSI, it is ensured that the information related to the strongest coefficient is reported first, which helps to ensure the accuracy of the codebook determined by the network device.

In some embodiments of the present application, the number of ports in the codebook is determined according to the high _- layer parameter K1 or L. Wherein, 2·L=K ₁ . Wherein, K ₁ is a high-level parameter or a predefined parameter, and L is a high-level parameter or a predefined parameter.

In some embodiments of the present application, if the rank of the codebook is 1, the maximum number of linear combination coefficients

or,

Wherein, β is determined according to high-level parameters or predefined parameters.

In some embodiments of the present application, if the number of PMI subbands N ₃ =1 or M=1, the maximum number of linear combination coefficients

where β is determined according to high-level parameters or predefined parameters; or

If M is greater than 1, the maximum number K ₀ of linear combination coefficients is determined according to K ₀ when N ₃ =1.

It should be understood that in the embodiment of the present application, N ₃ =1 may be replaced by W _f off.

In some embodiments, if the rank of the codebook is greater than 1, the sum of the numbers of non-zero coefficients of all layers is 2K ₀ ; or

If the rank of the codebook is greater than 1, all layers correspond to the same M. For example, M for all layers is 2.

In some embodiments of the present application, the terminal device reports the position of the non-zero coefficient by means of a bitmap and/or a combination number.

In some embodiments, when the number of reported non-zero coefficients is greater than or equal to the first threshold, or the number of reported non-zero coefficients is greater than the first threshold, the terminal device reports the number of non-zero coefficients in the form of a combined number Location.

In other embodiments, when the number of reported non-zero coefficients is less than or equal to the second threshold, or the number of reported non-zero coefficients is less than the second threshold, the terminal device reports the non-zero coefficients in the form of a combined number s position.

In some other embodiments, the number of non-zero coefficients reported is greater than the third threshold and less than the fourth threshold, or, the number of non-zero coefficients reported is greater than or equal to the third threshold and less than the fourth threshold, or, in When the number of reported non-zero coefficients is greater than or equal to the third threshold and less than or equal to the fourth threshold, the terminal device reports the positions of the non-zero coefficients determined by way of bitmap.

In some embodiments, the first threshold may be predefined or configured by a network device.

In some embodiments, the second threshold may be predefined or configured by the network device.

In some embodiments, the third threshold may be predefined or configured by the network device.

In some embodiments, the fourth threshold may be predefined or configured by a network device.

In some embodiments of the present application, when the number of reported non-zero coefficients is equal to 1, and/or, the number of reported non-zero coefficients is equal to the maximum number of non-zero coefficients corresponding to the current rank, the terminal device does not report the bit picture.

Based on the above embodiments, the terminal device prioritizes the non-zero coefficients, so that when reporting part of the CSI (that is, the part of the CSI needs to be discarded) to reduce the CSI overhead, it can select the non-zero coefficients that are reported first according to the priority ranking of the non-zero coefficients. The zero coefficient can reduce the impact of the reported part of the CSI on the accuracy of the codebook, that is, it is beneficial to balance the overhead of the codebook and the accuracy of the codebook.

In addition, the terminal device reports at least one of the port index i ^* corresponding to the strongest coefficient, the frequency-domain basis vector index f ^* corresponding to the strongest coefficient, _{Min initial} , the index of the non-zero frequency-domain basis vector and the first parameter a, Considering the joint distribution of channel space and delay, it is beneficial to compress codebook overhead and improve feedback efficiency.

The method embodiment of the present application is described in detail above in conjunction with FIG. 2 to FIG. 3 , and the device embodiment of the present application is described in detail below in conjunction with FIG. 4 to FIG. 7 . It should be understood that the device embodiment and the method embodiment correspond to each other, similar to The description can refer to the method embodiment.

Fig. 4 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application. As shown in Figure 4, the terminal device 400 includes:

The communication unit 410 is configured to report channel state information CSI to the network device, where the CSI includes at least one of the following information:

M frequency-domain basis vectors, wherein the M is a positive integer;

strongest coefficient;

bitmap.

In some embodiments of the present application, the CSI also includes at least one of the following information:

The port index i ^* corresponding to the strongest coefficient;

the index of the non-zero frequency-domain basis vector;

In some embodiments of the present application, the CSI includes i ^* and/or f ^* ,

The i ^* is reported by log ₂ K ₁ bits, wherein K ₁ represents the number of ports for which the terminal device reports CSI; and/or, the f ^* is reported by log ₂ M bits.

In some embodiments of the present application, the CSI includes i ^* and f ^* , and the i ^* and f ^* are jointly reported by log ₂ (K ₁ M _v ) bits, where K ₁ represents the CSI reported by the terminal device number of ports.

In some embodiments of the present application, the CSI includes f ^* , f ^* ∈[0,1], and the M frequency-domain basis vectors

The position according to the formula

It is determined, where f=0, 1, L, M-1, N ₃ means that the precoding matrix indicates the number of PMI subbands, and mod means modulus.

In some embodiments of the present application, the CSI includes _Minitial , where the _Minitial ∈[-M+1, L, 0].

In some embodiments of the present application, the M frequency-domain basis vectors

The position according to the formula

Determine, where f=0, 1, L, M-1, N ₃ represents the number of PMI sub-bands, and mod represents modulus.

In some embodiments of the present application, the _Minitial is reported by log ₂ M bits.

In some embodiments of the present application, the CSI includes _Minitial , and the _Minitial is determined according to log ₂ N′ ₃ , where N′ ₃ is configured by the network device, or N′ ₃ is predefined, or , N' ₃ is determined according to the length N of the window of the frequency-domain basis vector reported by the terminal device.

In some embodiments of the present application, the N'3 is determined according to the length N _of the window of the frequency-domain basis vector reported by the terminal device, including:

The _N'3 is equal to N, or,

said

Indicates rounding up.

In some embodiments of the present application, the N is determined according to parameters configured by the network device, or the N is determined according to predefined parameters.

In some embodiments of the present application, the CSI includes an index of a non-zero frequency-domain basis vector, and the index of the non-zero frequency-domain basis vector is passed

Bit indication, where _N'3 is configured by the network device, or _N'3 is predefined, or N'3 is determined according to the length N _of the window in which the terminal device reports the frequency-domain basis vector.

N′ ₃ =N, or,

N′ ₃ =2N-1, or,

said

Indicates rounding up.

In some embodiments of the present application, if the number of layers of the codebook is greater than 1, the CSI includes a set of indices of non-zero frequency-domain basis vectors, and the indices of the set of non-zero frequency-domain basis vectors correspond to the indices of the codebook All layers, or, the CSI includes indexes of a set of non-zero frequency-domain basis vectors respectively corresponding to each layer of the codebook.

In some embodiments of the present application, the M is 2, and the first parameter a is determined according to x and y, where x and y represent indexes of two frequency-domain basis vectors selected by the terminal device.

In some embodiments of the present application, the first parameter a is determined according to x and y, including: a=|x-y|, where a∈[1,N-1], N indicates that the terminal device reports the frequency domain basis The length of the window of the vector, || means to take the absolute value.

In some embodiments of the present application, the port index i ^* corresponding to the strongest coefficient is indicated by log ₂ K ₁ bits, where K ₁ represents the number of ports for which the terminal device reports CSI.

In the case where f ^* is equal to 0, the frequency-domain basis vector in the M frequency-domain basis vectors

In the case where f ^* is equal to 1, the frequency-domain basis vector in the M frequency-domain basis vectors

Among them, N ₃ represents the number of PMI subbands, and mod represents modulo.

In some embodiments of the present application, the CSI includes the first parameters a and f ^* , and the first parameters a and f ^* are jointly indicated by log ₂ (2(N-1)) bits, or, the The first parameter a is indicated by 1 bit, the f ^* is indicated by log ₂ (N-1) bits, and N represents the length of a window in which the terminal device reports the frequency domain basis vector.

In some embodiments of the present application, if the number of layers of the codebook is greater than 1, the CSI includes a first parameter a, or the CSI includes a first parameter a corresponding to each layer.

In some embodiments of the present application, if the number of layers of the codebook is greater than 1, the CSI includes one f ^* , and the one f ^* corresponds to all layers of the codebook, or, the CSI includes f ^* corresponding to each layer .

In some embodiments of the present application, the M frequency-domain basis vectors are continuous; or

The M frequency-domain basis vectors are within a window of length N, where N represents the length of the window in which the terminal device reports the frequency-domain basis vectors; or

The conditions satisfied by the M frequency-domain basis vectors are configured by the network device or are predefined.

In some embodiments of the present application, the CSI includes f ^* , where the f ^* is reported in UCI part 2, group 0.

In some embodiments of the present application, the terminal device 400 further includes:

A processing unit 420, configured to sort the non-zero coefficients and/or the bitmap.

In some embodiments of the present application, the processing unit 420 is also used to:

Sorting the non-zero coefficients and/or the bitmap according to at least one of priority of frequency-domain basis vectors, layer index, port index, port number for reporting CSI, and codebook rank number.

Determine the priority of the non-zero coefficients according to the following formula:

Pri(l,i,f)=2·L·v·π(f)+v·i+l

Among them, Pri(l,i,f) represents the priority of non-zero coefficients, 2·L represents the number of ports used to report CSI, wherein, 2·L=K ₁ , K ₁ represents the port through which the terminal device reports CSI number, i represents the port index, and f represents the index of the frequency-domain basis vector.

According to the index of the frequency domain base vector, the priority π(f) of the frequency domain base vector is determined.

According to the following formula, the priority π(f) of the frequency domain basis vector is determined:

π(f)=min(2 mod(ff ^* ,M), 2(M-mod(ff ^* ,M))-1)

In some embodiments of the present application, the priority of the frequency-domain basis vector corresponding to f ^* is higher than that of the next strongest coefficient

The priority of the corresponding frequency-domain basis vector.

π(f) = |ff ^* |, or

π(f)=mod(ff ^* ,M), or

Wherein, N ₃ represents the number of PMI subbands.

In some embodiments of the present application, the CSI is used to determine a codebook, and the number of ports in the codebook is determined according to a high-layer parameter K ₁ or L, where K ₁ , 2L represents the port used by the terminal device to report the CSI number.

In some embodiments of the present application, the CSI is used to determine a codebook, and if the rank of the codebook is 1, the maximum number of linear combination coefficients

or,

Wherein, β is determined according to a high-level parameter or a predefined parameter, wherein K ₁ represents the number of ports used by the terminal device to report CSI.

or

If M is greater than 1, the maximum number K ₀ of linear combination coefficients is determined according to K ₀ when N ₃ =1;

Wherein, K ₁ represents the number of ports used by the terminal device to report CSI, and β is determined according to high-layer parameters or predefined parameters.

In some embodiments of the present application, the CSI is used to determine a codebook, and if the rank of the codebook is greater than 1, the sum of the numbers of non-zero coefficients of all layers is 2K ₀ ; or

If the rank of the codebook is greater than 1, all layers correspond to the same M.

Optionally, in some embodiments, the above-mentioned communication unit may be a communication interface or a transceiver, or an input-output interface of a communication chip or a system-on-chip. The aforementioned processing unit may be one or more processors.

It should be understood that the terminal device 400 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 400 are for realizing the method shown in FIG. 2 For the sake of brevity, the corresponding process of the terminal device in 200 will not be repeated here.

Fig. 5 is a schematic block diagram of a network device according to an embodiment of the present application. The network device 500 of FIG. 5 includes:

The communication unit 510 is configured to receive channel state information CSI reported by the terminal device, wherein the CSI includes at least one item:

M frequency-domain basis vectors, wherein the M is a positive integer;

strongest coefficient;

Amplitude and phase indication information of non-zero coefficients;

bitmap.

The port index i ^* corresponding to the strongest coefficient;

non-zero indices of frequency-domain basis vectors;

The i ^* is reported by log ₂ K ₁ bits, where K ₁ represents the number of ports for which the terminal device reports CSI; and/or

The f ^* is reported by log ₂ Mbits.

In some embodiments of the present application, the CSI includes i ^* and f ^* ,

The i ^* and f ^* are jointly reported through log ₂ (K ₁ M _v ) bits, where K ₁ represents the number of ports for which the terminal device reports CSI.

The position according to the formula

In some embodiments of the present application, the CSI includes _Minitial , where the _Minitial ∈ [-M+1, L, 0].

The position according to the formula

In some embodiments of the present application, the CSI includes _Minitial , and the _Minitial is determined according to log ₂ N′ ₃ , where N′ ₃ is configured by the network device, or N′ ₃ is predefined, or, N ' ₃ is determined according to the length N of the window of the frequency-domain basis vector reported by the terminal device.

The _N'3 is equal to N, or,

said

Among them, b is a parameter configured by a network device, or a predefined parameter,

Indicates rounding up.

N′ ₃ =N, or,

N′ ₃ =2N-1, or,

said

Indicates rounding up.

In some embodiments of the present application, the network device 500 further includes:

A processing unit, configured to sort the non-zero coefficients and/or the bitmap.

In some embodiments of the present application, the processing unit is also used for:

Pri(l,i,f)=2·L·v·π(f)+v·i+l

Wherein, f represents the index of the frequency domain basis vector.

π(f)=min(2 mod(ff ^* ,M), 2(M-mod(ff ^* ,M))-1)

Wherein, f represents the index of the frequency domain basis vector.

The priority of the corresponding frequency-domain basis vector.

π(f) = |ff ^* |, or

π(f)=mod(ff ^* ,M), or

Wherein, N ₃ represents the number of PMI subbands.

In some embodiments of the present application, the CSI is used to determine the codebook. If the rank of the codebook is 1, the maximum number of linear combination coefficients

or,

or

It should be understood that the network device 500 according to the embodiment of the present application may correspond to the network device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 500 are for realizing the method shown in FIG. 2 For the sake of brevity, the corresponding processes of the network devices in 200 will not be repeated here.

FIG. 6 is a schematic structural diagram of a communication device 600 provided in an embodiment of the present application. The communication device 600 shown in FIG. 6 includes a processor 610, and the processor 610 can invoke and run a computer program from a memory, so as to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 6 , the communication device 600 may further include a memory 620 . Wherein, the processor 610 can invoke and run a computer program from the memory 620, so as to implement the method in the embodiment of the present application.

Wherein, the memory 620 may be an independent device independent of the processor 610 , or may be integrated in the processor 610 .

Optionally, as shown in FIG. 6, the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, to send information or data to other devices, or receive other Information or data sent by the device.

Wherein, the transceiver 630 may include a transmitter and a receiver. The transceiver 630 may further include antennas, and the number of antennas may be one or more.

Optionally, the communication device 600 may specifically be the network device of the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, details are not repeated here. .

Optionally, the communication device 600 may specifically be the mobile terminal/terminal device of the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, for the sake of brevity , which will not be repeated here.

FIG. 7 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 700 shown in FIG. 7 includes a processor 710, and the processor 710 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 7 , the chip 700 may further include a memory 720 . Wherein, the processor 710 can invoke and run a computer program from the memory 720, so as to implement the method in the embodiment of the present application.

Wherein, the memory 720 may be an independent device independent of the processor 710 , or may be integrated in the processor 710 .

Optionally, the chip 700 may also include an input interface 730 . Wherein, the processor 710 can control the input interface 730 to communicate with other devices or chips, specifically, can obtain information or data sent by other devices or chips.

Optionally, the chip 700 may also include an output interface 740 . Wherein, the processor 710 can control the output interface 740 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.

Optionally, the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in the methods of the embodiment of the present application. For the sake of brevity, details are not repeated here.

Optionally, the chip can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application. For the sake of brevity, here No longer.

It should be understood that the chip mentioned in the embodiment of the present application may also be called a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip.

FIG. 8 is a schematic block diagram of a communication system 900 provided by an embodiment of the present application. As shown in FIG. 8 , the communication system 900 includes a terminal device 910 and a network device 920 .

Wherein, the terminal device 910 can be used to realize the corresponding functions realized by the terminal device in the above method, and the network device 920 can be used to realize the corresponding functions realized by the network device in the above method. .

It should be understood that the processor in the embodiment of the present application may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Program logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. The volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (Static RAM, SRAM), Dynamic Random Access Memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM ) and Direct Memory Bus Random Access Memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

It should be understood that the above-mentioned memory is illustrative but not restrictive. For example, the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is, the memory in the embodiments of the present application is intended to include, but not be limited to, these and any other suitable types of memory.

The embodiment of the present application also provides a computer-readable storage medium for storing computer programs.

Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the methods of the embodiments of the present application. For brevity, here No longer.

Optionally, the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application , for the sake of brevity, it is not repeated here.

The embodiment of the present application also provides a computer program product, including computer program instructions.

Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, the Let me repeat.

Optionally, the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the methods of the embodiments of the present application, For the sake of brevity, details are not repeated here.

The embodiment of the present application also provides a computer program.

Optionally, the computer program can be applied to the network device in the embodiment of the present application. When the computer program is run on the computer, the computer executes the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity , which will not be repeated here.

Optionally, the computer program can be applied to the mobile terminal/terminal device in the embodiment of the present application. When the computer program is run on the computer, the computer executes each method in the embodiment of the present application to be implemented by the mobile terminal/terminal device For the sake of brevity, the corresponding process will not be repeated here.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

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

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A method for reporting a codebook, comprising:

The terminal device reports channel state information CSI to the network device, where the CSI includes at least one of the following information:

M frequency-domain basis vectors, where M is a positive integer;

strongest coefficient;

Amplitude indication information and phase indication information of non-zero coefficients;

bitmap.
The method according to claim 1, wherein the CSI further includes at least one of the following information:

The port index i * corresponding to the strongest coefficient;

The frequency-domain basis vector index f * corresponding to the strongest coefficient;

The terminal device reports the initial position information M initial of the window of the frequency domain basis vector;

the index of the non-zero frequency-domain basis vector;

A first parameter a, the first parameter is determined according to the indexes of the M frequency-domain basis vectors.
The method according to claim 1 or 2, wherein the CSI comprises i * and/or f * ,

The i * is reported by log 2 K 1 bits, wherein K 1 represents the number of ports for which the terminal device reports CSI; and/or, the f * is reported by log 2 M bits.
The method according to claim 1 or 2, wherein the CSI includes i * and f * , and the i * and f * are jointly reported by log 2 (K 1 M v ) bits, wherein K 1 represents The number of ports for which the terminal device reports the CSI.
The method according to any one of claims 2-4, wherein the CSI includes f * , f * ∈[0,1], and the M frequency-domain basis vectors
The position according to the formula
It is determined, where f=0, 1, L, M-1, N 3 means that the precoding matrix indicates the number of PMI subbands, and mod means modulus.
The method according to any one of claims 2-5, wherein the CSI includes Minitial , where the Minitial ∈[-M+1, L, 0].
The method according to claim 6, wherein the M frequency-domain basis vectors
The position according to the formula
Determine, where f=0, 1, L, M-1, N 3 represents the number of PMI sub-bands, and mod represents modulus.
The method according to claim 6 or 7, wherein the Minitial is reported by log 2 M bits.
The method according to any one of claims 2-5, wherein the CSI includes a Minitial , and the Minitial is determined according to log 2 N′ 3 , wherein N′ 3 is configured by the network device , or N′ 3 is predefined, or, N′ 3 is determined according to the length N of the window in which the terminal device reports the frequency-domain basis vector.
The method according to claim 9, wherein the N′ 3 is determined according to the length N of the window of the frequency domain basis vector reported by the terminal equipment, including:

The N'3 is equal to N, or,

said
Wherein, b is a parameter configured by the network device, or a predefined parameter,
Indicates rounding up.
The method according to claim 9 or 10, wherein the N is determined according to parameters configured by the network device, or the N is determined according to predefined parameters.
The method according to any one of claims 2-11, wherein the CSI includes an index of a non-zero frequency-domain basis vector, and the index of the non-zero frequency-domain basis vector passes
Bit indication, where N'3 is configured by the network device, or N'3 is predefined, or N'3 is determined according to the length N of the window in which the terminal device reports the frequency-domain basis vector.
The method according to claim 12, wherein said N'3 is determined according to the length N of the window of the frequency-domain basis vector reported by the terminal equipment, including:

N′ 3 =N, or,

N′ 3 =2N-1, or,

said
Among them, c is a parameter configured by a network device, or a predefined parameter,
Indicates rounding up.
The method according to any one of claims 2-13, wherein if the number of layers of the codebook is greater than 1, the CSI includes a set of indices of non-zero frequency-domain basis vectors, and the set of non-zero-frequency Indexes of domain basis vectors correspond to all layers of the codebook, or the CSI includes indices of a group of non-zero frequency domain basis vectors corresponding to each layer of the codebook.
The method according to any one of claims 2-14, wherein the M is 2, and the first parameter a is determined according to x and y, wherein x and y represent the 2 selected by the terminal device. Indexes of frequency-domain basis vectors.
The method according to claim 15, wherein the first parameter a is determined according to x and y, including: a=|x-y|, where a∈[1,N-1], N represents the terminal The length of the window in which the device reports the frequency-domain basis vector, and || means to take the absolute value.
The method according to claim 15 or 16, wherein the port index i * corresponding to the strongest coefficient is indicated by log 2 K 1 bits, wherein K 1 represents the number of ports for which the terminal device reports CSI.
The method according to any one of claims 15-17, wherein the frequency-domain basis vectors in the M frequency-domain basis vectors

In the case where f * is equal to 0, the frequency-domain basis vector in the M frequency-domain basis vectors

In the case where f * is equal to 1, the frequency-domain basis vector in the M frequency-domain basis vectors

Among them, N 3 represents the number of PMI subbands, and mod represents modulo.
The method according to any one of claims 2-18, wherein the CSI includes the first parameters a and f * , and the first parameters a and f * pass log 2 (2(N- 1)) bit joint indication, or, the first parameter a is indicated by 1 bit, the f * is indicated by log 2 (N-1) bits, and N represents the length of the window in which the terminal device reports the frequency domain basis vector .
The method according to any one of claims 2-19, wherein if the number of layers of the codebook is greater than 1, the CSI includes a first parameter a, or the CSI includes a first parameter a corresponding to each layer A parameter a.
The method according to any one of claims 2-20, wherein, if the number of layers of the codebook is greater than 1, the CSI includes a f * , and the f * corresponds to all layers of the codebook, or, The CSI includes f * corresponding to each layer.
The method according to any one of claims 1-21, wherein the M frequency-domain basis vectors are continuous; or

The M frequency-domain basis vectors are within a window of length N, where N represents the length of the window in which the terminal device reports the frequency-domain basis vectors; or

The conditions satisfied by the M frequency-domain basis vectors are configured by the network device or are predefined.
The method according to claim 22, wherein the frequency-domain basis vector in the M frequency-domain basis vectors
The method according to any one of claims 2-23, wherein the CSI includes f * , wherein the f * is reported in UCI part 2 group 0.
The method according to any one of claims 1-24, further comprising:

The terminal device sorts the non-zero coefficients and/or the bitmap.
The method according to claim 25, wherein the terminal device sorts the non-zero coefficients and/or the bitmap, comprising:

The terminal device calculates the non-zero coefficients and/or the bit The graphs are sorted.
The method according to claim 26, wherein, according to the priority of the frequency-domain basis vector, the terminal device selects at least one of a layer index, a port index, the number of ports used to report CSI, and the rank number of the codebook , sorting the non-zero coefficients and/or the bitmap, including:

The terminal device determines the priority of the non-zero coefficient according to the following formula:

Pri(l,i,f)=2·L·v·π(f)+v·i+l

Among them, Pri(l,i,f) represents the priority of non-zero coefficients, 2·L represents the number of ports used to report CSI, wherein, 2·L=K 1 , K 1 represents the port through which the terminal device reports CSI number, i represents the port index, and f represents the index of the frequency-domain basis vector.
The method according to claim 26 or 27, further comprising:

The terminal device determines the priority π(f) of the frequency-domain basis vector according to the index of the frequency-domain basis vector.
The method according to claim 28, wherein the terminal device determines the priority π(f) of the frequency domain base vector according to the index of the frequency domain base vector, including:

According to the following formula, the priority π(f) of the frequency domain basis vector is determined:

Wherein, f represents the index of the frequency-domain basis vector, and mod represents modulus.
The method according to claim 29, wherein the terminal device determines the priority π(f) of the frequency domain base vector according to the index of the frequency domain base vector, comprising:

According to the following formula, the priority π(f) of the frequency domain basis vector is determined:

π(f)=min(2 mod(ff * ,M), 2(M-mod(ff * ,M))-1)

Wherein, f represents the index of the frequency-domain basis vector, and mod represents modulus.
The method according to claim 28, characterized in that the priority of the frequency-domain basis vector corresponding to f * is higher than the next strongest coefficient
The priority of the corresponding frequency-domain basis vector.
The method according to claim 28 or 31, wherein the terminal device determines the priority π(f) of the frequency domain base vector according to the index of the frequency domain base vector, including:

According to the following formula, the priority π(f) of the frequency domain basis vector is determined:

π(f) = |ff * |, or

π(f)=mod(ff * ,M), or

Wherein, N 3 represents the number of PMI subbands.
The method according to any one of claims 1-32, wherein the CSI is used to determine a codebook, and the number of ports in the codebook is determined according to a high-level parameter K 1 or L, where K 1 , 2L Indicates the number of ports used by the terminal device to report CSI.
The method according to any one of claims 1-33, wherein the CSI is used to determine a codebook, and if the rank of the codebook is 1, the maximum number of linear combination coefficients
or,
Wherein, β is determined according to a high-level parameter or a predefined parameter, wherein K 1 represents the number of ports used by the terminal device to report CSI.
The method according to any one of claims 1-33, characterized in that, if the number of PMI subbands N 3 =1 or M=1, the maximum number of linear combination coefficients
or

If M is greater than 1, the maximum number K 0 of linear combination coefficients is determined according to K 0 when N 3 =1;

Wherein, K 1 represents the number of ports used by the terminal device to report CSI, and β is determined according to high-layer parameters or predefined parameters.
The method according to claim 34 or 35, wherein the CSI is used to determine a codebook, and if the rank of the codebook is greater than 1, the sum of the numbers of non-zero coefficients of all layers is 2K 0 ; or

If the rank of the codebook is greater than 1, all layers correspond to the same M.
A method for reporting a codebook, comprising:

The network device receives the channel state information CSI reported by the terminal device, wherein the CSI includes at least one item:

M frequency-domain basis vectors, wherein the M is a positive integer;

strongest coefficient;

Amplitude and phase indication information of non-zero coefficients;

bitmap.
The method according to claim 37, wherein the CSI further includes at least one of the following information:

The port index i * corresponding to the strongest coefficient;

The frequency-domain basis vector index f * corresponding to the strongest coefficient;

The terminal device reports the initial position information M initial of the window of the frequency domain basis vector;

non-zero indices of frequency-domain basis vectors;

A first parameter a, the first parameter is determined according to the indexes of the M frequency-domain basis vectors.
The method according to claim 38, wherein the CSI comprises i * and/or f * ,

The i * is reported by log 2 K 1 bits, where K 1 represents the number of ports for which the terminal device reports CSI; and/or

The f * is reported by log 2 Mbits.
The method of claim 38, wherein the CSI includes i * and f * ,

The i * and f * are jointly reported through log 2 (K 1 M v ) bits, where K 1 represents the number of ports for which the terminal device reports CSI.
The method according to any one of claims 38-40, wherein the CSI includes f * , f * ∈[0,1], and the M frequency-domain basis vectors
The position according to the formula
It is determined, where f=0, 1, L, M-1, N 3 means that the precoding matrix indicates the number of PMI subbands, and mod means modulus.
The method according to any one of claims 38-41, wherein the CSI includes Minitial , where the Minitial ∈[-M+1, L, 0].
The method according to claim 42, wherein the M frequency-domain basis vectors
The position according to the formula
Determine, where f=0, 1, L, M-1, N 3 represents the number of PMI sub-bands, and mod represents modulus.
The method according to claim 42 or 43, wherein the Minitial is reported by log 2 M bits.
The method according to any one of claims 38-41, wherein the CSI includes Minitial , and the Minitial is determined according to log 2 N' 3 , where N' 3 is configured by the network device, or N'3 is predefined, or N'3 is determined according to the length N of the window of the frequency-domain basis vector reported by the terminal device.
The method according to claim 45, wherein said N'3 is determined according to the length N of the window of the frequency-domain basis vector reported by the terminal equipment, including:

The N'3 is equal to N, or,

said
Among them, b is a parameter configured by a network device, or a predefined parameter,
Indicates rounding up.
The method according to claim 45 or 46, wherein the N is determined according to parameters configured by the network device, or the N is determined according to predefined parameters.
The method according to any one of claims 38-47, wherein the CSI includes an index of a non-zero frequency-domain basis vector, and the index of the non-zero frequency-domain basis vector passes
Bit indication, where N'3 is configured by the network device, or N'3 is predefined, or N'3 is determined according to the length N of the window of the frequency domain basis vector reported by the terminal device.
The method according to claim 48, wherein said N'3 is determined according to the length N of the window of the frequency-domain basis vector reported by the terminal equipment, including:

N′ 3 =N, or,

N′ 3 =2N-1, or,

said
Among them, c is a parameter configured by a network device, or a predefined parameter,
Indicates rounding up.
The method according to any one of claims 38-49, wherein if the number of layers of the codebook is greater than 1, the CSI includes a set of indices of non-zero frequency domain basis vectors, and the set of non-zero frequency domain Indexes of domain basis vectors correspond to all layers of the codebook, or the CSI includes indices of a group of non-zero frequency domain basis vectors corresponding to each layer of the codebook.
The method according to any one of claims 38-50, wherein the M is 2, and the first parameter a is determined according to x and y, where x and y represent the 2 selected by the terminal device. Indexes of frequency-domain basis vectors.
The method according to claim 51, wherein the first parameter a is determined according to x and y, including: a=|x-y|, where a∈[1,N-1], N represents the terminal The length of the window in which the device reports the frequency-domain basis vector, and || means to take the absolute value.
The method according to claim 51 or 52, wherein the port index i * corresponding to the strongest coefficient is indicated by log 2 K 1 bits, wherein K 1 represents the number of ports for which the terminal device reports CSI.
The method according to any one of claims 51-53, wherein the frequency-domain basis vector in the M frequency-domain basis vectors

In the case where f * is equal to 0, the frequency-domain basis vector in the M frequency-domain basis vectors

In the case where f * is equal to 1, the frequency-domain basis vector in the M frequency-domain basis vectors

Among them, N 3 represents the number of PMI subbands, and mod represents modulo.
The method according to any one of claims 38-54, wherein the CSI includes the first parameters a and f * , and the first parameters a and f * pass log 2 (2(N- 1)) bit joint indication, or, the first parameter a is indicated by 1 bit, the f * is indicated by log 2 (N-1) bits, and N represents the length of the window in which the terminal device reports the frequency domain basis vector .
The method according to any one of claims 38-55, wherein if the number of layers of the codebook is greater than 1, the CSI includes a first parameter a, or the CSI includes a first parameter a corresponding to each layer. A parameter a.
The method according to any one of claims 38-56, wherein, if the number of layers of the codebook is greater than 1, the CSI includes a f * , and the f * corresponds to all layers of the codebook, or, The CSI includes f * corresponding to each layer.
The method according to any one of claims 37-57, wherein the M frequency-domain basis vectors are continuous; or

The M frequency-domain basis vectors are within a window of length N, where N represents the length of the window in which the terminal device reports the frequency-domain basis vectors; or

The conditions satisfied by the M frequency-domain basis vectors are configured by the network device or are predefined.
The method according to claim 58, wherein the frequency-domain basis vector in the M frequency-domain basis vectors
The method according to any one of claims 38-59, wherein the CSI includes f * , wherein the f * is reported in UCI part 2 group 0.
The method according to any one of claims 37-60, further comprising:

The network device sorts the non-zero coefficients and/or the bitmap.
The method according to claim 61, wherein the terminal device sorts the non-zero coefficients and/or the bitmap, comprising:

The network device calculates the non-zero coefficient and/or the bit according to at least one of the priority of the frequency domain basis vector, the layer index, the port index, the number of ports used to report the CSI, and the rank number of the codebook The graphs are sorted.
The method according to claim 62, wherein the network device selects at least one of a layer index, a port index, the number of ports used to report CSI, and the rank number of the codebook according to the priority of the frequency-domain basis vector , sorting the non-zero coefficients and/or the bitmap, including:

The network device determines the priority of the non-zero coefficient according to the following formula:

Pri(l,i,f)=2·L·v·π(f)+v·i+l

Among them, Pri(l,i,f) represents the priority of non-zero coefficients, 2·L represents the number of ports used to report CSI, wherein, 2·L=K 1 , K 1 represents the port through which the terminal device reports CSI number, i represents the port index, and f represents the index of the frequency-domain basis vector.
The method according to claim 62 or 63, further comprising:

The network device determines the priority π(f) of the frequency-domain basis vector according to the index of the frequency-domain basis vector.
The method according to claim 64, wherein the network device determines the priority π(f) of the frequency domain base vector according to the index of the frequency domain base vector, comprising:

According to the following formula, the priority π(f) of the frequency domain basis vector is determined:

Wherein, f represents the index of the frequency domain basis vector.
The method according to claim 65, wherein the network device determines the priority π(f) of the frequency domain base vector according to the index of the frequency domain base vector, comprising:

According to the following formula, the priority π(f) of the frequency domain basis vector is determined:

π(f)=min(2 mod(ff * ,M), 2(M-mod(ff * ,M))-1)

Wherein, f represents the index of the frequency domain basis vector.
The method according to claim 28, characterized in that the priority of the frequency-domain basis vector corresponding to f * is higher than the next strongest coefficient
The priority of the corresponding frequency-domain basis vector.
The method according to claim 67, wherein the network device determines the priority π(f) of the frequency domain base vector according to the index of the frequency domain base vector, comprising:

According to the following formula, the priority π(f) of the frequency domain basis vector is determined:

π(f) = |ff * |, or

π(f)=mod(ff * ,M), or

Wherein, N 3 represents the number of PMI subbands.
The method according to any one of claims 37-68, wherein the CSI is used to determine a codebook, and the number of ports in the codebook is determined according to a high-level parameter K 1 or L, where K 1 , 2L Indicates the number of ports used by the terminal device to report CSI.
The method according to any one of claims 37-69, wherein the CSI is used to determine a codebook, and if the rank of the codebook is 1, the maximum number of linear combination coefficients
or,
Wherein, β is determined according to a high-level parameter or a predefined parameter, wherein K 1 represents the number of ports used by the terminal device to report CSI.
The method according to any one of claims 37-69, wherein if the number of PMI subbands N 3 =1 or M=1, the maximum number of linear combination coefficients
or

If M is greater than 1, the maximum number K 0 of linear combination coefficients is determined according to K 0 when N 3 =1;

Wherein, K 1 represents the number of ports used by the terminal device to report CSI, and β is determined according to high-layer parameters or predefined parameters.
The method according to claim 70 or 71, wherein the CSI is used to determine a codebook, and if the rank of the codebook is greater than 1, the sum of the numbers of non-zero coefficients of all layers is 2K 0 ; or

If the rank of the codebook is greater than 1, all layers correspond to the same M.
A terminal device, characterized in that it includes:

A communication unit, configured to report channel state information CSI to the network device, where the CSI includes at least one of the following information:

M frequency-domain basis vectors, wherein the M is a positive integer;

strongest coefficient;

Amplitude indication information and phase indication information of non-zero coefficients;

bitmap.
The terminal device according to claim 73, wherein the CSI further includes at least one of the following information:

The port index i * corresponding to the strongest coefficient;

The frequency-domain basis vector index f * corresponding to the strongest coefficient;

The terminal device reports the initial position information M initial of the window of the frequency domain basis vector;

the index of the non-zero frequency-domain basis vector;

A first parameter a, the first parameter is determined according to the indexes of the M frequency-domain basis vectors.
The terminal device according to claim 74, wherein the CSI includes i * and/or f * ,

The i * is reported by log 2 K 1 bits, wherein K 1 represents the number of ports for which the terminal device reports CSI; and/or, the f * is reported by log 2 M bits.
The terminal device according to claim 74, wherein the CSI includes i * and f * , and the i * and f * are jointly reported by log 2 (K 1 M v ) bits, wherein K 1 represents the The number of ports through which the terminal device reports the CSI.
The terminal device according to any one of claims 74-76, wherein the CSI includes f * , f * ∈[0,1], and the M frequency-domain basis vectors
The position according to the formula
It is determined, where f=0, 1, L, M-1, N 3 means that the precoding matrix indicates the number of PMI subbands, and mod means modulus.
The terminal device according to any one of claims 74-77, wherein the CSI includes Minitial , where the Minitial ∈[-M+1, L, 0].
The terminal device according to claim 78, wherein the M frequency-domain basis vectors
The position according to the formula
Determine, where f=0, 1, L, M-1, N 3 represents the number of PMI sub-bands, and mod represents modulus.
The terminal device according to claim 78 or 79, wherein the Minitial is reported by log 2 M bits.
The terminal device according to any one of claims 74-77, wherein the CSI includes Minitial , and the Minitial is determined according to log 2 N′ 3 , where N′ 3 is the configuration of the network device or N′ 3 is predefined, or N′ 3 is determined according to the length N of the window in which the terminal device reports the frequency-domain basis vector.
The terminal device according to claim 81, wherein the N'3 is determined according to the length N of the window of the frequency-domain basis vector reported by the terminal device, including:

The N'3 is equal to N, or,

said
Wherein, b is a parameter configured by the network device, or a predefined parameter,
Indicates rounding up.
The terminal device according to claim 81 or 82, wherein the N is determined according to parameters configured by the network device, or the N is determined according to predefined parameters.
The terminal device according to any one of claims 74-83, wherein the CSI includes an index of a non-zero frequency-domain basis vector, and the index of the non-zero frequency-domain basis vector passes
Bit indication, where N'3 is configured by the network device, or N'3 is predefined, or N'3 is determined according to the length N of the window in which the terminal device reports the frequency-domain basis vector.
The terminal device according to claim 84, wherein said N'3 is determined according to the length N of the window of the frequency-domain basis vector reported by the terminal device, including:

N′ 3 =N, or,

N′ 3 =2N-1, or,

said
Among them, c is a parameter configured by a network device, or a predefined parameter,
Indicates rounding up.
The terminal device according to any one of claims 74-85, wherein if the number of codebook layers is greater than 1, the CSI includes a set of non-zero frequency-domain basis vector indices, and the set of non-zero Indexes of frequency-domain basis vectors correspond to all layers of the codebook, or the CSI includes indices of a group of non-zero frequency-domain basis vectors corresponding to each layer of the codebook.
The terminal device according to any one of claims 74-86, wherein the M is 2, and the first parameter a is determined according to x and y, where x and y represent the Indexes to 2 frequency-domain basis vectors.
The terminal device according to claim 87, wherein the first parameter a is determined according to x and y, including: a=|x-y|, where a∈[1,N-1], N represents the The terminal device reports the length of the window of the frequency-domain basis vector, and || means to take the absolute value.
The terminal device according to claim 87 or 88, wherein the port index i * corresponding to the strongest coefficient is indicated by log 2 K 1 bits, wherein K 1 represents the number of ports for which the terminal device reports CSI.
The terminal device according to any one of claims 87-89, wherein the frequency domain basis vectors among the M frequency domain basis vectors

In the case where f * is equal to 0, the frequency-domain basis vector in the M frequency-domain basis vectors

In the case where f * is equal to 1, the frequency-domain basis vector in the M frequency-domain basis vectors

Among them, N 3 represents the number of PMI subbands, and mod represents modulo.
The terminal device according to any one of claims 74-90, wherein the CSI includes the first parameters a and f * , and the first parameters a and f * pass log 2 (2(N -1)) bit joint indication, or, the first parameter a is indicated by 1 bit, the f * is indicated by log 2 (N-1) bits, and N represents the window of the frequency-domain basis vector reported by the terminal device length.
The terminal device according to any one of claims 74-91, wherein if the number of layers of the codebook is greater than 1, the CSI includes a first parameter a, or the CSI includes a corresponding The first parameter a.
The terminal device according to any one of claims 74-92, wherein if the number of layers of the codebook is greater than 1, the CSI includes one f * , and the one f * corresponds to all layers of the codebook, or , the CSI includes f * corresponding to each layer.
The terminal device according to any one of claims 73-93, wherein the M frequency-domain basis vectors are continuous; or

The M frequency-domain basis vectors are within a window of length N, where N represents the length of the window in which the terminal device reports the frequency-domain basis vectors; or

The conditions satisfied by the M frequency-domain basis vectors are configured by the network device or are predefined.
The terminal device according to claim 94, wherein the frequency-domain basis vector in the M frequency-domain basis vectors is
The terminal device according to any one of claims 74-95, wherein the CSI includes f * , wherein the f * is reported in UCI part 2 group 0.
The terminal device according to any one of claims 73-96, wherein the terminal device further comprises:

A processing unit, configured to sort the non-zero coefficients and/or the bitmap.
The terminal device according to claim 97, wherein the processing unit is further used for:

Sorting the non-zero coefficients and/or the bitmap according to at least one of priority of frequency-domain basis vectors, layer index, port index, port number for reporting CSI, and codebook rank number.
The terminal device according to claim 98, wherein the processing unit is further used for:

Determine the priority of the non-zero coefficients according to the following formula:

Pri(l,i,f)=2·L·v·π(f)+v·i+l

Among them, Pri(l,i,f) represents the priority of non-zero coefficients, 2·L represents the number of ports used to report CSI, wherein, 2·L=K 1 , K 1 represents the port through which the terminal device reports CSI number, i represents the port index, and f represents the index of the frequency-domain basis vector.
The terminal device according to claim 98 or 99, wherein the processing unit is further used for:

According to the index of the frequency domain base vector, the priority π(f) of the frequency domain base vector is determined.
The terminal device according to claim 100, wherein the processing unit is further configured to:

According to the following formula, the priority π(f) of the frequency domain basis vector is determined:

Wherein, f represents the index of the frequency-domain basis vector, and mod represents modulus.
The terminal device according to claim 100, wherein the processing unit is further configured to:

According to the following formula, the priority π(f) of the frequency domain basis vector is determined:

π(f)=min(2 mod(ff * ,M), 2(M-mod(ff * ,M))-1)

Wherein, f represents the index of the frequency-domain basis vector, and mod represents modulus.
The terminal device according to claim 100, wherein the priority of the frequency-domain basis vector corresponding to f * is higher than the second strongest coefficient
The priority of the corresponding frequency-domain basis vector.
The terminal device according to claim 100 or 103, wherein the processing unit is further configured to:

According to the following formula, the priority π(f) of the frequency domain basis vector is determined:

π(f) = |ff * |, or

π(f)=mod(ff * ,M), or

Wherein, N 3 represents the number of PMI subbands.
The terminal device according to any one of claims 73-104, wherein the CSI is used to determine a codebook, and the number of ports in the codebook is determined according to a high-level parameter K 1 or L, where K 1 , 2L represents the number of ports used by the terminal device to report CSI.
The terminal device according to any one of claims 73-105, wherein the CSI is used to determine a codebook, and if the rank of the codebook is 1, the maximum number of linear combination coefficients
or,
Wherein, β is determined according to a high-level parameter or a predefined parameter, wherein K 1 represents the number of ports used by the terminal device to report CSI.
The terminal device according to any one of claims 73-105, wherein if the number of PMI subbands N 3 =1 or M=1, the maximum number of linear combination coefficients
or

If M is greater than 1, the maximum number K 0 of linear combination coefficients is determined according to K 0 when N 3 =1;

Wherein, K 1 represents the number of ports used by the terminal device to report CSI, and β is determined according to a high-layer parameter or a predefined parameter.
The terminal device according to claim 106 or 107, wherein the CSI is used to determine a codebook, and if the rank of the codebook is greater than 1, the sum of the numbers of non-zero coefficients of all layers is 2K 0 ; or

If the rank of the codebook is greater than 1, all layers correspond to the same M.
A network device, characterized in that it includes:

The communication unit is configured to receive channel state information CSI reported by the terminal device, wherein the CSI includes at least one item:

M frequency-domain basis vectors, wherein the M is a positive integer;

strongest coefficient;

Amplitude and phase indication information of non-zero coefficients;

bitmap.
The network device according to claim 109, wherein the CSI further includes at least one of the following information:

The port index i * corresponding to the strongest coefficient;

The frequency-domain basis vector index f * corresponding to the strongest coefficient;

The terminal device reports the initial position information M initial of the window of the frequency domain basis vector;

non-zero indices of frequency-domain basis vectors;

A first parameter a, the first parameter is determined according to the indexes of the M frequency-domain basis vectors.
The network device according to claim 109 or 110, wherein the CSI includes i * and/or f * ,

The i * is reported by log 2 K 1 bits, where K 1 represents the number of ports for which the terminal device reports CSI; and/or

The f * is reported by log 2 Mbits.
The network device according to claim 109 or 110, wherein the CSI includes i * and f * ,

The i * and f * are jointly reported through log 2 (K 1 M v ) bits, where K 1 represents the number of ports for which the terminal device reports CSI.
The network device according to any one of claims 110-112, wherein the CSI includes f * , f * ∈[0,1], and the M frequency-domain basis vectors
The position according to the formula
It is determined, where f=0, 1, L, M-1, N 3 indicates the number of PMI subbands indicated by the precoding matrix, and mod indicates modulus.
The network device according to any one of claims 110-113, wherein the CSI includes Minitial , where the Minitial ∈[-M+1, L, 0].
The network device according to claim 114, wherein the M frequency-domain basis vectors
The position according to the formula
Determine, where, f=0, 1, L, M-1, N 3 represents the number of PMI sub-bands, and mod represents modulus.
The network device according to claim 114 or 115, wherein the Minitial is reported by log 2 M bits.
The network device according to any one of claims 110-113, wherein the CSI includes Minitial , and the Minitial is determined according to log 2 N' 3 , wherein N' 3 is configured by the network device, Or N'3 is predefined, or N'3 is determined according to the length N of the window in which the terminal device reports the frequency-domain basis vector.
The network device according to claim 117, wherein the N'3 is determined according to the length N of the window of the frequency-domain basis vector reported by the terminal device, including:

The N'3 is equal to N, or,

said
Among them, b is a parameter configured by a network device, or a predefined parameter,
Indicates rounding up.
The network device according to claim 117 or 118, wherein the N is determined according to parameters configured by the network device, or the N is determined according to predefined parameters.
The network device according to any one of claims 110-119, wherein the CSI includes an index of a non-zero frequency-domain basis vector, and the index of the non-zero frequency-domain basis vector passes
Bit indication, where N'3 is configured by the network device, or N'3 is predefined, or N'3 is determined according to the length N of the window in which the terminal device reports the frequency-domain basis vector.
The network device according to claim 120, wherein the N'3 is determined according to the length N of the window of the frequency-domain basis vector reported by the terminal device, including:

N′ 3 =N, or,

N′ 3 =2N-1, or,

said
Among them, c is a parameter configured by a network device, or a predefined parameter,
Indicates rounding up.
The network device according to any one of claims 110-121, wherein if the number of layers of the codebook is greater than 1, the CSI includes a set of non-zero frequency-domain basis vector indices, and the set of non-zero Indexes of frequency-domain basis vectors correspond to all layers of the codebook, or, the CSI includes indexes of a group of non-zero frequency-domain basis vectors corresponding to each layer of the codebook.
The network device according to any one of claims 110-122, wherein the M is 2, and the first parameter a is determined according to x and y, where x and y represent the Indexes to 2 frequency-domain basis vectors.
The network device according to claim 123, wherein the first parameter a is determined according to x and y, including: a=|x-y|, where a∈[1,N-1], N represents the The terminal device reports the length of the window of the frequency-domain basis vector, and || means to take the absolute value.
The network device according to claim 123 or 124, wherein the port index i * corresponding to the strongest coefficient is indicated by log 2 K 1 bits, wherein K 1 represents the number of ports for which the terminal device reports CSI.
The network device according to any one of claims 123-125, wherein the frequency-domain basis vector in the M frequency-domain basis vectors

In the case where f * is equal to 0, the frequency-domain basis vector in the M frequency-domain basis vectors

In the case where f * is equal to 1, the frequency-domain basis vector in the M frequency-domain basis vectors

Among them, N 3 represents the number of PMI subbands, and mod represents modulo.
The network device according to any one of claims 110-126, wherein the CSI includes the first parameters a and f * , and the first parameters a and f * pass log 2 (2(N -1)) bit joint indication, or, the first parameter a is indicated by 1 bit, the f * is indicated by log 2 (N-1) bits, and N represents the window of the frequency-domain basis vector reported by the terminal device length.
The network device according to any one of claims 110-127, wherein if the number of layers of the codebook is greater than 1, the CSI includes a first parameter a, or the CSI includes a corresponding The first parameter a.
The network device according to any one of claims 110-128, wherein if the number of layers of the codebook is greater than 1, the CSI includes one f * , and the one f * corresponds to all layers of the codebook, or , the CSI includes f * corresponding to each layer.
The network device according to any one of claims 109-129, wherein the M frequency-domain basis vectors are continuous; or

The M frequency-domain basis vectors are within a window of length N, where N represents the length of the window in which the terminal device reports the frequency-domain basis vectors; or

The conditions satisfied by the M frequency-domain basis vectors are configured by the network device or are predefined.
The network device according to claim 130, wherein the frequency-domain basis vector in the M frequency-domain basis vectors
The network device according to any one of claims 110-131, wherein the CSI includes f * , wherein the f * is reported in UCI part 2 group 0.
The network device according to any one of claims 109-132, wherein the network device further comprises:

A processing unit, configured to sort the non-zero coefficients and/or the bitmap.
The network device according to claim 133, wherein the processing unit is further used for:

Sorting the non-zero coefficients and/or the bitmap according to at least one of priority of frequency-domain basis vectors, layer index, port index, port number for reporting CSI, and codebook rank number.
The network device according to claim 134, wherein the processing unit is further configured to:

Determine the priority of the non-zero coefficients according to the following formula:

Pri(l,i,f)=2·L·v·π(f)+v·i+l

Among them, Pri(l,i,f) represents the priority of non-zero coefficients, 2·L represents the number of ports used to report CSI, wherein, 2·L=K 1 , K 1 represents the port through which the terminal device reports CSI number, i represents the port index, and f represents the index of the frequency-domain basis vector.
The network device according to claim 134 or 135, wherein the processing unit is further used for:

According to the index of the frequency domain base vector, the priority π(f) of the frequency domain base vector is determined.
The network device according to claim 136, wherein the processing unit is further configured to:

According to the following formula, the priority π(f) of the frequency domain basis vector is determined:

Wherein, f represents the index of the frequency domain basis vector.
The network device according to claim 136, wherein the processing unit is further configured to:

According to the following formula, the priority π(f) of the frequency domain basis vector is determined:

π(f)=min(2 mod(ff * ,M), 2(M-mod(ff * ,M))-1)

Wherein, f represents the index of the frequency domain basis vector.
The network device according to claim 136, wherein the priority of the frequency-domain basis vector corresponding to f * is higher than the next strongest coefficient
The priority of the corresponding frequency-domain basis vector.
The network device according to claim 136 or 139, wherein the processing unit is further configured to:

According to the following formula, the priority π(f) of the frequency domain basis vector is determined:

π(f) = |ff * |, or

π(f)=mod(ff * ,M), or

Wherein, N 3 represents the number of PMI subbands.
The network device according to any one of claims 109-140, wherein the CSI is used to determine a codebook, and the number of ports in the codebook is determined according to a high-level parameter K 1 or L, where K 1 , 2L represents the number of ports used by the terminal device to report CSI.
The network device according to any one of claims 109-141, wherein the CSI is used to determine a codebook, and if the rank of the codebook is 1, the maximum number of linear combination coefficients
or,
Wherein, β is determined according to a high-level parameter or a predefined parameter, wherein K 1 represents the number of ports used by the terminal device to report CSI.
The network device according to any one of claims 109-141, wherein if the number of PMI subbands N 3 =1 or M=1, the maximum number of linear combination coefficients
or

If M is greater than 1, the maximum number K 0 of linear combination coefficients is determined according to K 0 when N 3 =1;

Wherein, K 1 represents the number of ports used by the terminal device to report CSI, and β is determined according to high-layer parameters or predefined parameters.
The network device according to claim 142 or 143, wherein the CSI is used to determine a codebook, and if the rank of the codebook is greater than 1, the sum of the numbers of non-zero coefficients of all layers is 2K 0 ; or

If the rank of the codebook is greater than 1, all layers correspond to the same M.
A terminal device, characterized by comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute any of the following claims 1 to 36 one of the methods described.
A chip, characterized by comprising: a processor, configured to invoke and run a computer program from a memory, so that a device installed with the chip executes the method according to any one of claims 1 to 36.
A computer-readable storage medium, characterized by being used to store a computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 36.
A computer program product, characterized by comprising computer program instructions, which cause a computer to execute the method as claimed in any one of claims 1 to 36.
A computer program, characterized in that the computer program causes a computer to execute the method according to any one of claims 1-36.
A network device, characterized by comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute any of the following claims 37 to 72 one of the methods described.
A chip, characterized by comprising: a processor, configured to invoke and run a computer program from a memory, so that a device installed with the chip executes the method according to any one of claims 37 to 72.
A computer-readable storage medium, characterized by being used for storing a computer program, the computer program causes a computer to execute the method according to any one of claims 37 to 72.
A computer program product, characterized by comprising computer program instructions, the computer program instructions cause a computer to execute the method according to any one of claims 37 to 72.
A computer program, characterized in that the computer program causes a computer to execute the method according to any one of claims 37-72.