WO2022082481A1

WO2022082481A1 - Codebook sending method, terminal device and network device

Info

Publication number: WO2022082481A1
Application number: PCT/CN2020/122372
Authority: WO
Inventors: 黄莹沛
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2022-04-28
Also published as: CN116158149A

Abstract

The embodiments of the present application relate to a codebook sending method, a terminal device, and a communication device. The method comprises: the terminal device divides a plurality of frequency domain subbands into at least one frequency domain subband set, each frequency domain subband set comprising a plurality of frequency domain units; and the terminal device selects part or all of the frequency domain subband sets from among the at least one frequency domain subband set, and sends codebook information of the selected frequency domain subband sets, the codebook information comprising at least one of the following: the identification of the selected frequency domain subband sets; the linear combination coefficient corresponding to the selected frequency domain subband sets; a port selection vector; and a frequency domain vector. The embodiments of the present application may enable a plurality of beams to be carried in different frequency domains, thereby reducing the overhead of required channel state information-reference signals (CSI-RSs).

Description

A codebook sending method, terminal device and network device

technical field

The present application relates to the field of communications, and more particularly, to a method for sending a codebook, a terminal device, and a network device.

Background technique

In the fifth generation mobile communication (5G, 5th Generation) New Radio (NR, New Radio) system, the terminal device reports the NR type II codebook used to represent the channel state information (CSI, Channel state information) to the network device. For each layer of codebook, the existing NR type II codebook is independently coded in the frequency domain (each subband). Due to the high spatial quantization accuracy, the total feedback amount is too large. By feeding back the frequency domain-space joint codebook, in Under the condition of ensuring NR performance, the amount of feedback can be greatly saved. The NR type II codebook can be expressed as:

Among them, W ₁ indicates 2L spatial beams (beams),

Used to determine M discrete Fourier transform (DFT, Discrete fourier transformation) basis vectors,

(2L*M) indicates the weighting coefficients of any spatial beam, frequency domain DFT vector pair.

In the existing NR type II codebook reporting technology, the entire frequency domain range can only be carried in one beam, so the required channel state information-reference signal (CSI-RS, Channel state information-reference signal) overhead is relatively large.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a codebook sending method, terminal equipment, and network equipment, which can implement multiple beams in different frequency domains and reduce the overhead of required CSI-RS.

An embodiment of the present application provides a method for sending a codebook, including:

The terminal device divides the plurality of frequency domain subbands into at least one frequency domain subband set, and each frequency domain subband set includes a plurality of frequency domain units;

The terminal device selects at least one frequency domain subband set from the at least one frequency domain subband set, and sends codebook information of the selected frequency domain subband set, where the codebook information includes at least one of the following:

The identifier of the selected frequency domain subband set; the linear combination coefficient (LCC, Linear combination coefficient) corresponding to the selected frequency domain subband set; port selection vector; frequency domain vector.

The embodiment of the present application also provides a codebook receiving method, including:

The network device receives codebook information of the frequency domain subband set selected by the terminal device, where the codebook information includes at least one of the following:

The identifier of the selected frequency domain subband set; the linear combining coefficient LCC corresponding to the selected frequency domain subband set; the port selection vector; the frequency domain vector.

The embodiment of the present application also provides a terminal device, including:

a dividing module, configured to divide the plurality of frequency domain subbands into at least one frequency domain subband set, each frequency domain subband set including a plurality of frequency domain units;

a selection module for selecting part or all of the frequency domain subband sets from at least one frequency domain subband set;

A sending module, configured to send codebook information of the selected frequency domain subband set, where the codebook information includes at least one of the following:

The embodiment of the present application also provides a network device, including:

A receiving module, configured to receive codebook information of the frequency domain subband set selected by the terminal device, where the codebook information includes at least one of the following:

Embodiments of the present application further provide a terminal device, including: a processor and a memory, where the memory is used to store a computer program, and the processor invokes and runs the computer program stored in the memory to execute the above method.

An embodiment of the present application further provides a network device, including: a processor and a memory, where the memory is used to store a computer program, and the processor invokes and executes the computer program stored in the memory to execute the above method.

An embodiment of the present application further provides a chip, including: a processor, configured to call and run a computer program from a memory, so that a device on which the chip is installed executes the above method.

Embodiments of the present application further provide a computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute the above method.

Embodiments of the present application also provide a computer program product, including computer program instructions, wherein the computer program instructions cause a computer to execute the above method.

The embodiments of the present application also provide a computer program, the computer program enables a computer to execute the above method.

In this embodiment of the present application, the terminal device divides the frequency domain range into at least one frequency domain subband set, selects all or part of the divided frequency domain subband set, and reports the codebook information of the selected frequency domain subband set, so that Different frequency domains can carry multiple beams, thereby reducing the overhead of required CSI-RS.

Description of drawings

FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application.

FIG. 2 is an implementation flowchart of a method 200 for sending a codebook according to an embodiment of the present application.

FIG. 3 is a schematic diagram of a manner of dividing a frequency domain subband set according to an embodiment of the present application.

FIG. 4 is a schematic diagram of another manner of dividing a frequency domain subband set according to an embodiment of the present application.

FIG. 5 is a schematic diagram of another manner of dividing a frequency domain subband set according to an embodiment of the present application.

FIG. 6 is an implementation flowchart of a method 600 for receiving a codebook according to an embodiment of the present application.

FIG. 7 is a schematic structural diagram of a terminal device 700 according to an embodiment of the present application.

FIG. 8 is a schematic structural diagram of a network device 800 according to an embodiment of the present application.

FIG. 9 is a schematic structural diagram of a communication device 900 according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a chip 1000 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 accompanying drawings in the embodiments of the present application.

It should be noted that the terms "first" and "second" in the description and claims of the embodiments of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. order. The objects described by "first" and "second" described at the same time may be the same or different.

The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a wideband Code Division Multiple Access (CDMA) system (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), Long Term Evolution (Long Term Evolution, LTE) system, Advanced Long Term Evolution (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) unlicensed spectrum, NR-U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), 5th-Generation , 5G) system or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are 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 (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), and vehicle to vehicle (Vehicle to Vehicle, V2V) communication, etc., the embodiments of the present application can also be applied to these communications system.

Optionally, the communication system in this embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) distribution. web scene.

This embodiment of the present application does not limit the applied spectrum. For example, the embodiments of the present application may be applied to licensed spectrum, and may also be applied to unlicensed spectrum.

The embodiments of this application describe various embodiments in conjunction with network equipment and terminal equipment, where: terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber 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 (STAION, ST) in the WLAN, can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, and next-generation communication systems, such as terminal devices in NR networks or Terminal equipment in the future evolved Public Land Mobile Network (Public Land Mobile Network, PLMN) network, etc.

As an example and 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 are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, 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 device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart jewelry, etc. for physical sign monitoring.

A network device can be a device used to communicate with a mobile device. The network device can be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, or a WCDMA A base station (NodeB, NB), it can also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, wearable device, and network equipment (gNB) in NR networks Or network equipment in the PLMN network that evolves in the future.

In this embodiment of the present application, a network device provides services for a cell, and a terminal device communicates with the network device through 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 frequency domain resource). The cell corresponding to the base station), the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell), where the small cell can include: Metro cell, Micro cell, Pico cell cell), Femto cell, etc. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-speed data transmission services.

FIG. 1 exemplarily shows one network device 110 and two terminal devices 120. Optionally, the wireless communication system 100 may include a plurality of network devices 110, and the coverage of each network device 110 may include other numbers The terminal device 120 is not limited in this embodiment of the present application. The embodiments of the present application may be applied to one terminal device 120 and one network device 110 , and may also be applied to one terminal device 120 and another terminal device 120 .

Optionally, the wireless communication system 100 may further include other network entities such as a mobility management entity (Mobility Management Entity, MME), an access and mobility management function (Access and Mobility Management Function, AMF). This is not limited.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

It should be understood that the "instruction" mentioned in the embodiments of the present application may be a direct instruction, an indirect instruction, or an associated relationship. For example, if A indicates B, it can indicate that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indicates B indirectly, such as 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 corresponding relationship between the two, or may indicate that there is an associated relationship between the two, or indicate and be instructed, configure and be instructed configuration, etc.

In order to facilitate the understanding of the technical solutions of the embodiments of the present application, the related technologies of the embodiments of the present application are described below. The following related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, which all belong to the embodiments of the present application. protected range.

The NR type II codebook can be expressed as:

Wherein, W represents the NR type II codebook, that is, the frequency domain-space joint codebook. W ₁ represents the DFT vector of the 2L spatial beams. W _f represents the DFT basis vectors of the M frequency domains.

represents the transpose of _Wf .

represents the weighting coefficient of the spatial frequency domain pair,

is a matrix of size 2L*M.

The CSI content reported by the UE includes the L beams indicated by W ₁ ,

The indicated M DFT basis vectors, and the quantized

The base station obtains the downlink CSI of each layer by calculating the product of the three.

An embodiment of the present application proposes a method for sending a codebook. FIG. 2 is a schematic flowchart of a method 200 for sending a codebook according to an embodiment of the present application. The method can optionally be applied to the system shown in FIG. 1 , but It doesn't stop there. The method includes at least some of the following.

S210: The terminal device divides multiple frequency domain subbands into at least one frequency domain subband set, and each frequency domain subband set includes multiple frequency domain units;

S220: The terminal device selects part or all of the frequency domain subband sets from the at least one frequency domain subband set, and sends codebook information of the selected frequency domain subband set, where the codebook information includes at least one of the following:

The identifier of the selected frequency domain subband set; the linear combining coefficient (LCC) corresponding to the selected frequency domain subband set; the port selection vector; the frequency domain vector.

In an implementation, the above frequency domain subband may specifically be a Precoding Matrix Indicator (PMI, Precoding Matrix Indicator) subband. The terminal device divides the N ₃ PMI subbands into 0 ₃ frequency domain subband sets, each frequency domain subband set includes N PMI subbands, and each PMI subband includes 1 frequency domain unit; wherein,

N ₃ is a positive integer; O ₃ is a positive integer; N is equal to N ₃ /O ₃ .

FIG. 3 is a schematic diagram of a manner of dividing a frequency domain subband set according to an embodiment of the present application. In the example shown in FIG. 3 , the manner in which the terminal device divides the N ₃ PMI subbands into O ₃ frequency domain subband sets includes:

Divide the PMI subband whose sequence number is i+mO ₃ into the frequency domain subband set whose sequence number is i; wherein,

The sequence numbers of the N ₃ PMI subbands are respectively integers in the range of [0, N ₃ ); i is an integer in the range of [0, O ₃ ); m is an integer in the range of [0, N ).

As shown in FIG. 3 , the UE divides N ₃ PMI subbands, where N ₃ =12, and the sequence numbers of each PMI subband are 0, 1, . . . 11, respectively. The UE divides the 12 PMI subbands into O ₃ frequency domain subband sets, where O ₃ =4, and the sequence numbers of each frequency domain subband set are 0, 1, 2, and 3, respectively. After division, each frequency domain subband set includes N PMI subbands, and each PMI subband includes one frequency domain unit. As shown in FIG. 3 , N=N ₃ /O ₃ =3, that is, each frequency domain subband set includes 3 PMI subbands, that is, includes 3 frequency domain units.

As shown in FIG. 3 , the sequence number of the PMI subband included in the frequency domain subband set whose sequence number is i is i+mO ₃ , where m is an integer in the range of [0, N), that is, m=0, 1 , ..., N-1. For example, the frequency domain subband set with sequence number 0 includes PMI subbands with sequence numbers 0, 4, and 8, and the frequency domain subband set with sequence number 1 includes PMI subbands with sequence numbers 1, 5, and 9. The frequency domain subband set with sequence number 2 includes PMI subbands with sequence numbers 2, 6, and 10, and the frequency domain subband set with sequence number 3 includes PMI subbands with sequence numbers 3, 7, and 11. In this embodiment, one PMI subband includes one frequency domain unit, or one PMI subband can be considered to be equivalent to one frequency domain unit; therefore, one frequency domain subband set includes N PMI subbands, or one can be considered as one The frequency domain subband set includes N frequency domain units.

Optionally, the above N ₃ =N _sb R; wherein,

R∈{1,2,4,...,2 ⁿ }, and satisfy

or

Wherein R is a parameter determined by the high layer; N _sb is the number of CQI subbands;

is a predetermined parameter; n is an integer.

Optionally, the above O ₃ is a parameter determined by a high layer or a fixed parameter. The value manner of O ₃ can include at least one of the following:

O ₃ =R; or, when R=4, O ₃ ∈ {2,4}; when R=2, O ₃ =2; alternatively, O ₃ =2; alternatively, O ₃ =4; alternatively, O ₃ =R/2 ^m , where m is an integer; or, O ₃ satisfies mod(N ₃ ,O ₃ )=0; or, when N ₃ <T, O ₃ =1; otherwise (ie, N ₃ ≥T) , O ₃ >1; or, when N ₁ N ₂ <T or 2N ₁ N ₂ <T or 2L <T or K ₀ <T, O ₃ =1; when N ₁ N ₂ ≥T or 2N ₁ N ₂ ≥T or 2L≥T or K ₀ ≥T, O ₃ >1; wherein, the above N ₁ is the number of antenna ports in the horizontal direction, N ₂ is the number of antenna ports in the vertical direction, T is a preset threshold, and L is the beam. number, K ₀ is the maximum number of non-zero coefficients.

In another implementation, the process of dividing the frequency domain subband set by the terminal device includes:

The N ₃ PMI subbands are divided, and each PMI subband is divided into 0 ₃ frequency domain units;

Extract the frequency domain units with the same sequence number from each PMI subband respectively, and combine the frequency domain units with the same sequence number into a frequency domain subband set to obtain O ₃ frequency domain subband sets, each frequency domain subband set Including N frequency domain units; wherein,

N ₃ is a positive integer; O ₃ is a positive integer; N is equal to N ₃ .

FIG. 4 is a schematic diagram of another manner of dividing a frequency domain subband set according to an embodiment of the present application. In the example shown in FIG. 4 , the terminal device divides N ₃ (N ₃ =2 in the example of FIG. 4 ) PMI subbands, and divides each PMI subband into 2 frequency domain units, respectively A frequency domain unit is selected from each PMI subband to form a frequency domain subband set, thereby forming two frequency domain subband sets. For example, in the example of FIG. 4 , the PMI subband with sequence number 0 (PMI subband 0 for short) is divided into two frequency domain units, including frequency domain unit 0 and frequency domain unit 1; The subband (referred to as PMI subband 1) is divided into two frequency domain units, including frequency domain unit 0 and frequency domain unit 1. After that, extract frequency domain unit 0 of PMI subband 0 and frequency domain unit 0 of PMI subband 1 to form a frequency domain subband set with sequence number 0; in the same way, extract frequency domain unit 1 of PMI subband 0 and the frequency domain unit 1 of the PMI subband 1 to form a frequency domain subband set with a sequence number of 1.

It can be seen that in this way, N=N3. That is, as shown in Figure 4, each frequency domain subband set contains a frequency domain unit extracted from each PMI subband, so the frequency domain unit value contained in each frequency domain subband set is the same as the PMI subband. The values of the bands are the same.

Correspondingly, in this way, each frequency domain unit is composed of

It consists of a resource block (RB, (Resource Block).

Optionally, the above O ₃ =2 ^m and

where m and n are integers.

Divide N ₃ (CQI, channel quality indication) subbands, and divide each CQI subband into O ₃ frequency domain units;

Extract frequency domain units with the same sequence number from each CQI subband respectively, and form frequency domain units with the same sequence number into a frequency domain subband set to obtain O ₃ frequency domain subband sets, each frequency domain subband set Including N frequency domain units; wherein, N ₃ is a positive integer; O ₃ is a positive integer; N is equal to N ₃ .

FIG. 5 is a schematic diagram of another manner of dividing a frequency domain subband set according to an embodiment of the present application. In the example shown in FIG. 5 , the terminal device divides N ₃ (N ₃ =2 in the example of FIG. 5 ) CQI subbands, and divides each CQI subband into 4 frequency domain units, respectively A frequency domain unit is selected from each PMI subband to form a frequency domain subband set, thereby forming four frequency domain subband sets. For example, in the example of FIG. 5, the CQI subband with sequence number 0 (CQI subband 0 for short) is divided into 4 frequency domain units, including frequency domain unit 0, frequency domain unit 1, frequency domain unit 2 and frequency domain unit 3. At the same time, the CQI subband with sequence number 1 (CQI subband 1 for short) is divided into 4 frequency domain units, including frequency domain unit 0, frequency domain unit 1, frequency domain unit 2 and frequency domain unit 3. After that, extract frequency domain unit 0 of PMI subband 0 and frequency domain unit 0 of PMI subband 1 to form a frequency domain subband set with sequence number 0; in the same way, extract frequency domain unit 1 of PMI subband 0 and the frequency domain unit 1 of the PMI subband 1 to form a frequency domain subband set with a serial number of 1; extract the frequency domain unit 2 of the PMI subband 0 and the frequency domain unit 2 of the PMI subband 1 to form a serial number of 2 Frequency domain subband set; extract frequency domain unit 3 of PMI subband 0 and frequency domain unit 3 of PMI subband 1 to form a frequency domain subband set with sequence number 3.

It can be seen that in this way, N=N3. That is, as shown in FIG. 5 , each frequency domain subband set contains a frequency domain unit extracted from each CQI subband, so the frequency domain unit value contained in each frequency domain subband set is the same as the CQI subband. The values of the bands are the same.

Correspondingly, in this way, each frequency domain unit is composed of

composed of RBs.

Optionally, the above O ₃ =2 ^m and

where m is an integer.

The manner in which the UE divides the frequency domain subband set is described above. After dividing the frequency domain subband set, the UE may select some or all (for example, the number is K) frequency domain subbands from the divided frequency domain subband set according to at least one of high-level parameter configuration, predetermined selection method and dynamic indication information Band set, reporting codebook information to the selected frequency domain subband set. Optionally, the base station selects K frequency domain subband sets through O ₃ bit indication.

In an implementation, the frequency domain vector included in the above codebook information includes a first frequency domain vector and/or a second frequency domain vector, for example, expressed by the following formula:

in,

Represents the frequency domain vector contained in the codebook information;

represents the first frequency domain vector;

represents the second frequency domain vector;

Represents the calculation of the Kronecker product.

is a vector of length K whose optional values are also equal to K.

is a vector of length N whose optional values are also equal to N.

A Kronecker product is an operation between two matrices.

and

Representing two vectors, a matrix is a special kind of matrix. right

and

Calculate the Kronecker product to get a vector of length K*N, the frequency domain vector.

In one implementation, the first frequency domain vector

The selectable values of , include the vector formed by the elements of each row or column of the K-order unit matrix, that is, the vector with the qth element being 1 and the remaining elements being 0.

For example, when K=2, the identity matrix of order K is as follows:

but

There are 2 available values for , namely vector(1,0) and vector(0,1).

For another example, when K=4, the K-order identity matrix is as follows:

but

The selectable values include 4, namely vector(1,0,0,0), vector(0,1,0,0), (0,0,1,0) and vector(0,0,0, 1).

In one implementation, the first frequency domain vector

The selectable values of include a vector of elements in each row or column of a K-order Hadamard matrix.

For example, when K=2, the Hadamard matrix of order K is as follows:

but

The selectable values include 2, namely vector(1,-1) and vector(-1,1).

For another example, when K=4, the Hadamard matrix of order K is as follows:

but

The selectable values include 4, namely vector(1,1,1,1), vector(1,-1,1,-1), (1,1,-1,-1) and vector(1, -1,-1,1).

In one implementation, the first frequency domain vector

The selectable value of is a column in the following matrix:

(when K=2)

Then the first frequency domain vector

There are 2 available values for , namely any two of vector(1,0), vector(0,1) and vector(1,1).

In one implementation, the first frequency domain vector

The selectable value of is a column in the following matrix:

(when K=4)

Then the first frequency domain vector

The selectable values include 4, namely vector(1,0,0,0), vector(0,1,0,0), (0,0,1,0), vector(0,0,0, 1), vector(1,1,0,0), (0,0,1,1), vector(1,0,1,0), vector(0,1,0,0) and vector(1, 1,1,1) any four.

In one implementation, the first frequency domain vector

is the DFT vector, that is

or

Among them, q,k∈[0,1,...,K-1].

In one implementation, the second frequency domain vector

is a vector of length N and each element takes a fixed value. E.g,

That is, a matrix of all 1s of length N.

In one implementation, the second frequency domain vector

is the DFT vector for the second frequency domain vector,

or

Among them, N,k∈[0,1,...,K-1]. . Optionally, the sequence number k of the DFT vector is fixed, or indicated by the base station, or reported by the UE to the base station.

UE determines

and

and report to the base station the determined

and

The base station determines W _f in the codebook information reported by the UE accordingly. And, the UE selects a port from 2 N ₁ N ₂ ports, and reports the corresponding port selection vector to the base station, where N ₁ is the number of antenna ports in the horizontal direction, and N ₂ is the number of antenna ports in the vertical direction. In addition, the UE also reports to the base station other codebook information such as the location information of the non-zero coefficients, the sum of the non-zero coefficients, and the priority of the non-zero coefficients.

For the first frequency domain vector

The embodiments of the present application propose the following representations:

Optionally, the first frequency domain vector is represented by first indication information; the length of the first indication information is determined by at least one of the following: K; the number of first frequency domain vectors included in the codebook information; non-zero coefficients number; number of layers.

Optionally, the length of the above-mentioned first indication information is

or K; wherein, M is the number of first frequency domain vectors included in the codebook information; K _nz is the number of non-zero coefficients.

Optionally, in the embodiment of the present application, for the case where the number of layers v is greater than 1, a manner of independently selecting each layer may be adopted, and all layers are indicated by the same first indication information. Specifically, the length of the first indication information is

or

Wherein, M is the number of first frequency domain vectors of each layer included in the codebook information; v is the number of layers.

Optionally, for the case where the number of layers v is greater than 1 in this embodiment of the present application, an independent selection method for each layer may be adopted, and each layer is indicated by an independent first indication information. Optionally, the first frequency domain vector is represented by one first indication information for each layer;

The length of the first indication information corresponding to each layer is

in,

M _l is the number of the first frequency domain vectors of the lth layer included in the codebook information.

Optionally, in this embodiment of the present application, when the number of layers v is greater than 1, each layer may be independently selected, and the layers are grouped, and the layers included in each group are indicated by a piece of first indication information. Optionally, the first frequency domain vector is represented by at least two pieces of first indication information, and each first indication information corresponds to the first frequency domain vector of a partial layer included in the codebook information. For example, for the case of V=4, the first frequency domain vectors of layers 0 and 1 are represented by one first indication information, and the first frequency domain vectors of layers 2 and 3 are represented by another first indication information. express.

Optionally, in this embodiment of the present application, for the case where the number of layers v is greater than 1, a joint selection method may be adopted, for example, one indication information is used to indicate the optional range of the first frequency domain vector, and the other indication information is used to indicate the The first frequency domain vector selected in the optional range.

For example, the above-mentioned first frequency domain vector is represented by the second indication information and the third indication information;

The length of the second indication information is

Wherein, M ₀ is a parameter determined by a high layer or a parameter determined by a terminal device (representing the optional range of the above-mentioned first frequency domain vector);

The length of the third indication information is

Wherein, v is the number of layers, and M is the number of first frequency domain vectors of each layer included in the codebook information.

Optionally, in this embodiment of the present application, for the case where the number of layers v is greater than 1, a block selection method may be adopted, for example, the first frequency domain vector is represented by the fourth indication information and the fifth indication information;

The length of the fourth indication information is

The fourth indication information is used to indicate the starting position of the first frequency domain vector of each layer included in the codebook information;

The length of the fifth indication information is

Among them, v is the number of layers; K _W is the window length of the first frequency domain vector of each layer starting from the starting position, and M is the number of first frequency domain vectors of each layer included in the codebook information.

For the second frequency domain vector

Optionally, the second frequency domain vector is represented by sixth indication information; the length of the sixth indication information is determined by at least one of the following: N; the number of second frequency domain vectors included in the codebook information; the number of layers; Layer serial number.

Optionally, the length of the above-mentioned sixth indication information is

Wherein, M is the number of second frequency domain vectors included in the codebook information.

Optionally, for the case where the number of layers v is greater than 1 in this embodiment of the present application, a method of independently selecting each layer may be adopted, and all layers are indicated by the same sixth indication information. Specifically, the length of the sixth indication information is

in,

M is the number of second frequency domain vectors of each layer included in the codebook information;

v is the number of layers.

Optionally, in this embodiment of the present application, for the case where the number of layers v is greater than 1, a manner of independently selecting each layer may be adopted, and each layer is indicated by an independent sixth indication information.

Optionally, in this embodiment of the present application, for the case where the number of layers v is greater than 1, a combined selection method may be adopted, for example, one indication information is used to indicate the optional range of the second frequency domain vector, and the other indication information is used to indicate the A second frequency domain vector selected in an optional range.

For example, the above-mentioned second frequency domain vector is represented by the seventh indication information and the eighth indication information;

The length of the seventh indication information is

Wherein, M ₀ is a parameter determined by a higher layer or a parameter determined by a terminal device (representing the optional range of the above-mentioned second frequency domain vector);

The length of the eighth indication information is

Wherein, v is the number of layers, and M is the number of second frequency domain vectors of each layer included in the codebook information.

For the port selection vector, the embodiments of the present application propose the following representations:

The port selection vector is represented by the ninth indication information;

Optionally, the length of the ninth indication information is determined by at least one of the following: N ₁ ; N ₂ ; the number of port selection vectors included in the codebook information; the number of layers; wherein, N ₁ is the number of antenna ports in the horizontal direction, N ₂ is the number of antenna ports in the vertical direction.

Optionally, the length of the above ninth indication information is

or

Among them, 2L is the number of port selection vectors included in the codebook information.

Optionally, in this embodiment of the present application, for the case where the number of layers v is greater than 1, each layer may be independently selected, and all layers are indicated by the same ninth indication information. Specifically, the length of the ninth indication information is

or

Among them, 2L is the number of port selection vectors of each layer included in the codebook information. v is the number of layers.

Optionally, for the case where the number of layers v is greater than 1 in this embodiment of the present application, a manner of independently selecting each layer may be adopted, and each layer may be indicated by using an independent ninth indication information. Optionally, the port selection vector is represented by one ninth indication information for each layer;

The length of the ninth indication information corresponding to each layer is

or

Wherein, 2L _l is the number of port selection vectors of the lth layer included in the codebook information. N ₁ is the number of antenna ports in the horizontal direction; N ₂ is the number of antenna ports in the vertical direction.

Optionally, in this embodiment of the present application, when the number of layers v is greater than 1, each layer may be independently selected, and the layers are grouped, and the layers included in each group are indicated by ninth indication information. Optionally, the port selection vector is represented by at least two ninth indication information, and each ninth indication information corresponds to the port selection vector of a part of the layers included in the codebook information. For example, for the case of V=4, the port selection vectors of layers 0 and 1 are represented by one ninth indication information, and the port selection vectors of layers 2 and 3 are represented by another ninth indication information.

Optionally, in this embodiment of the present application, for the case where the number of layers v is greater than 1, a combined selection method may be adopted. For example, one indication information is used to indicate the optional range of the port selection vector, and the other indication information is used to indicate the optional range of the port selection vector. Port selection vector for range selection.

For example, the above port selection vector is represented by the tenth indication information and the eleventh indication information;

The length of the tenth indication information is

or

Wherein, N ₁ is the number of antenna ports in the horizontal direction, N ₂ is the number of antenna ports in the vertical direction, and L ₀ is a parameter determined by a higher layer or a parameter determined by a terminal device (representing the optional range of the above-mentioned port selection vector);

The length of the eleventh indication information is

Among them, v is the number of layers, and 2L is the number of port selection vectors of each layer included in the codebook information.

Optionally, in this embodiment of the present application, for the case where the number of layers v is greater than 1, a block selection method may be adopted, for example, the port selection vector is represented by the twelfth indication information and the thirteenth indication information;

Among them, the length of the twelfth indication information is

or

The twelfth indication information is used to indicate the starting position of the port selection vector of each layer included in the codebook information;

The length of the thirteenth indication information is

or

Among them, v is the number of layers, L _W is the window length of the port selection vector of each layer starting from the above-mentioned starting position, and 2L is the number of first frequency domain vectors of each layer included in the codebook information.

The above introduces the first frequency domain vector

second frequency domain vector

and port selection vector indication. When reporting the codebook information, the UE reports the foregoing content.

In addition, the above codebook information may further include non-zero coefficient position information. In addition, the UE may also send information such as the sum of the non-zero coefficients and the priority of the non-zero coefficients to the base station.

Optionally, the above-mentioned non-zero coefficient position information is represented by the fourteenth indication information; the length of the fourteenth indication information is

2LM,

or

Among them, L is the number of beams; K ₀ is the number of the largest non-zero coefficients; M is the number of the first frequency domain vectors included in the codebook information; N ₁ is the number of antenna ports in the horizontal direction; N ₂ is the antenna in the vertical direction Number of ports; K _nz is the number of non-zero coefficients.

Optionally, for the case where the number of layers v is greater than 1 in this embodiment of the present application, a manner of independently selecting each layer may be adopted, and each layer is indicated by an independent fourteenth indication information. Optionally, each layer of the non-zero coefficient position information is represented by one fourteenth indication information;

The length of the fourteenth indication information corresponding to each layer is

Wherein, M is the number of first frequency domain vectors of each layer included in the codebook information; K _nz is the number of non-zero coefficients of each layer included in the codebook information.

Optionally, in this embodiment of the present application, when the number of layers v is greater than 1, each layer may be independently selected, and the layers are grouped, and the layers included in each group are indicated by a fourteenth indication message. Optionally, the non-zero coefficient position information is represented by at least two fourteenth indication information, and each fourteenth indication information corresponds to the non-zero coefficient position of the partial layer included in the non-zero coefficient position information. For example, for the case of V=4, the non-zero coefficient positions of layers 0 and 1 are represented by one fourteenth indication information, and the non-zero coefficient positions of layers 2 and 3 are represented by another fourteenth indication information. express.

Optionally, in this embodiment of the present application, for the case where the number of layers v is greater than 1, a joint selection method may be adopted, for example, one indication information is used to indicate the optional range of non-zero coefficient positions, and the other Selected non-zero coefficient positions within the selection range.

For example, the above-mentioned non-zero coefficient position information is represented by the fifteenth indication information and the sixteenth indication information;

The length of the fifteenth indication information is

or

Wherein, L is the number of beams, M is the number of the first frequency domain vectors of each layer included in the codebook information, and K _nz,0 is a parameter determined by a high layer or a parameter determined by a terminal device;

The length of the sixteenth indication information is

Among them, v is the number of layers, and K _nz,i is the number of non-zero coefficients of the i-th layer included in the codebook information.

In the following embodiments, the above-mentioned

abbreviated as

The number of alternative ways to represent y elements from x elements.

In an implementation, the UE selects 2L ports from 2N ₁ N ₂ ports, and the length is

or

The indication information (unit is bit) reports the port selection vector; the UE selects from N

Choose M from

then the length is

report of instructions

UE from K

choose one

then the length is

Or report the instruction information of K

In an implementation, the UE selects 2 ports from 2N ₁ N ₂ ports, and the length is

or

The indication information reports port selection vector; UE selects from K

Choose from K _nz

then the length is

(or Kbits) indication information reporting

or

The indication information (unit is bit) reports the port selection vector; the UE selects from K

Choose M from

then the length is

(or Kbits) indication information reporting

The UE selects K _nz non-zero coefficients from the 2LM non-zero coefficients, and the length is

(or 2LMbits) the indication information reports the position of the non-zero coefficient.

or

The indication information (unit is bit) is reported to the port selection vector; the UE selects K _nz non-zero coefficients from the 2LK non-zero coefficients, and the length is

(or 2LKbits) to report the position of non-zero coefficients.

In an implementation, the UE selects K _nz non-zero coefficients from 2N ₁ N ₂ K non-zero coefficients, and the length is

(or 2N ₁ N ₂ K bits) the indication information reports the position of the non-zero coefficient.

In the above multiple implementations, K _nz represents the number of non-zero coefficients, and its value cannot exceed the maximum number of non-zero coefficients or the sum of the number of non-zero coefficients of all layers.

Among them, the maximum number of non-zero coefficients can be represented by K ₀ ,

or

Among them, β is a parameter configured by the high layer for configuring the maximum number of non-zero coefficients.

For the case of v>1, the sum of the non-zero coefficients of all layers can be represented by K _total , where,

α>1.

In the embodiment of the present application, for the case where the number of layers v>1, an independent selection method can be adopted, for example, the UE can select the port,

or position of non-zero coefficients for independent selection. specifically:

In one implementation, the UE independently selects the ports of each layer, and each layer selects 2L ports from 2N ₁ N ₂ ports, then for all layers, a length of

or

The indication information is reported to the port selection vector. Alternatively, the UE selects the same port for each layer, and can use a length of

or

The indication information is reported to the port selection vector.

In one implementation, the UE

Independent selection, each layer from N

Choose M from

Then for all layers, the length of

report of instructions

Alternatively, the UE selects the same for each layer

For all layers, lengths of

report of instructions

In one implementation, the UE

Independent selection, each layer from K

choose 1

Then for all layers, the length of

report of instructions

Alternatively, the UE selects the same for each layer

For all layers, lengths of

report of instructions

In one implementation, the UE

Independent selection, each layer from K

Choose M from

Then for all layers, the length of

report of instructions

Alternatively, the UE selects the same for each layer

For all layers, lengths of

report of instructions

In one implementation, for the case where the number of layers is v=4, one indication information is used for the layers with sequence numbers 0 and 1 to indicate the port selected by the UE, and another indication information is used for the layers with sequence numbers 2 and 3 to indicate the UE to select the port. port.

For example, when l=0,1, the length is

or

The indication information indicates the port selected by the UE in the 0th layer and the 1st layer; when l=2, 3, the length is

or

The indication information indicates the ports selected by the UE in layers 2 and 3; wherein, L ₁ represents the number of ports selected in layers 0 and 1, and L ₂ represents the number of ports selected in layers 2 and 3 The number of ports selected, L ₁ and L ₂ can be the same or different.

In one implementation, one indication information is used for each layer to indicate the port selected by the UE. For example, for layer l, the length is

or

The indication information indicates the port selected by the UE in layer 1. Wherein, L ₁ represents the number of ports selected in the first layer, and the number of ports selected in each layer may be the same or different.

In an implementation, an indication message is used for each layer to indicate the UE selected

For example, for layer l, the length is

The indication information indicates that the UE selects the

Among them, M ₁ represents the selected in the lth layer

number, selected at each layer

The number can be the same or different.

In one implementation, the pass length is

The indication information (or 2LMbits) indicates the positions of non-zero coefficients of all layers, and at the same time, the amplitude mapping table may contain 0 amplitudes.

Similar to the port selection vector and the frequency domain resource indication, the positions of the non-zero coefficients can also be indicated for different layers. For example, for the case of v=4, an indication information is used for the 0th layer and the 1st layer to indicate the non-zero value. For the position of the coefficient, another indication information is used for the second layer and the third layer to indicate the position of the non-zero coefficient.

In the embodiment of the present application, for the case where the number of layers v>1, a joint selection method may be adopted, for example, the UE selects ports,

or position of non-zero coefficients for joint selection. specifically:

In one implementation, the UE performs joint selection of ports, and uses two indication information to indicate the port selected by the UE, one of which indicates the port selected from each layer of ports (the number is denoted as L ₀ ), and the other indication information Indicates the ports selected by each layer from the L ₀ ports. For example, using a length of

or

The indication information indicates L ₀ ports selected from each layer of ports, using a length of

The indication information indicates the final port selected from L ₀ ports at each layer. Wherein, L ₀ may be a parameter determined by a higher layer or a parameter reported by the UE; if L ₀ is a parameter reported by the UE, it may be reported in the first part (part1) of the CSI uplink control information (UCI, Uplink control information).

In one implementation, the UE pairs

Joint selection is performed, and two indication information is used to indicate the UE selected

One of the instructions indicates that the

selected in

(the number is recorded as M ₀ ), and another indication information indicates that each layer starts from the M ₀

selected in

For example, using a length of

The instructions indicate the information from each layer

Selected M ₀

Adopt length of

The instruction information indicates that each layer starts from M ₀

selected in the final

Wherein, M ₀ may be a parameter determined by a higher layer or a parameter reported by the UE; if M ₀ is a parameter reported by the UE, it may be reported in the CSI UCI part1.

In one implementation, the UE pairs

One of the instructions indicates that the

selected in

For example, using a length of

The instructions indicate the information from each layer

Selected M ₀

Adopt length of

The instruction information indicates that each layer starts from M ₀

selected in the final

In one implementation, the UE jointly selects the non-zero coefficients, and uses two indication information to indicate the non-zero coefficients selected by the UE, one of which indicates the non-zero coefficients selected from the non-zero coefficients of each layer (the number is denoted as K _nz,0 ), another indication information indicates the non-zero coefficients selected by each layer from the K _nz,0 non-zero coefficients. For example, using a length of

or

The indication information indicates K _{nz, 0} non-zero coefficients selected from the non-zero coefficients of each layer, and each layer adopts a length of

The indication information indicates the final non-zero coefficient selected by this layer from the K _nz,0 non-zero coefficients. where K _nz,0 is determined by high-level parameters.

In one implementation, K _{nz_total} coefficients are selected from the 2Lv non-zero coefficients by

The bit indication information is reported to the base station.

In the embodiment of the present application, for the case where the number of layers v>1, the method of block indication can be adopted, for example, the port of the UE for each layer,

Or the position of the non-zero coefficient for block indication, that is, indicating the port,

or the starting position of the non-zero coefficient, and the port determined within the range determined by the starting position,

or non-zero coefficients. specifically:

In an implementation, the UE uses indication information with a length of log ₂ (2N ₁ N ₂ ) or log ₂ (N ₁ N ₂ ) to indicate the starting position of the port, and passes the length of

or

The indication information is used to determine the port determined by the UE within the range determined by the starting position. where the length is

The indication information of can correspond to the case where polarizations are independent and Lw ports are selected from 2N ₁ N ₂ ports; the length is

The indication information of can correspond to the case where polarizations are independent and Lw ports are selected from N ₁ N ₂ ports; the length is

The indication information of can correspond to the case where the polarizations are the same.

In an implementation, the UE uses indication information with a length of log ₂ (K) to indicate

the starting position, and through the length of

The indication information to determine the range of each layer determined by the UE within the range determined by the starting position

In addition to reporting the information introduced in the above embodiment, the UE may also report the sum of the non-zero coefficients of all layers in the CSI UCI part1, and the sum of the non-zero coefficients of all layers may be 0. Optionally, for the case of rank (rank)=1, use the indication information of length log ₂ (K ₀ +1) for reporting; for the case of rank>1, use the length of log ₂ (2K ₀ +1) to report Instruct the information to be reported. Among them, K ₀ represents the maximum number of non-zero coefficients.

Optionally, when the sum of the reported non-zero coefficients is 0, the UE does not report the CSI group 0/group1/group2 part2.

Optionally, the indication information of the sum of non-zero coefficients reported by the UE may be for any CQI.

Further, the UE can also report the strongest coefficient indication information, for example:

When v=1, the strongest coefficient indication is reported through indication information with a length of log ₂ (K _nz ).

Alternatively, when v>1, the length of the pass is

indication information, or the length of each layer is

The indication information reports the strongest coefficient indication.

Alternatively, all report a strongest coefficient, with a length of

the instruction information indicated.

Further, the UE can also report the priority of non-zero coefficients, including: Pri(l,i,f)=2*L*v*f+v*i+l; where, Pri(l,i,f) means reporting The non-zero coefficient priority of ;

l, i, f respectively represent the serial number of the layer, the serial number of the frequency domain vector, and the serial number of the port; l=1,2,…,v; i=0,1,…,2L-1; f=0,1,… , Mv-1; Mv is a parameter corresponding to different layers.

Or, Pri(l,i,f)=2*Mv*v*i+v*f+l; where, Pri(l,i,f) represents the reported non-zero coefficient priority; l, i, f are respectively Indicates the serial number of the layer, the serial number of the frequency domain vector, the serial number of the port; l=1,2,…,v; i=0,1,…,2L-1; f=0,1,…,Mv-1; Mv are parameters corresponding to different layers.

It can be seen from the above embodiments that in the embodiment of the present application, the terminal device divides the frequency domain range into at least one frequency domain subband set, selects all or part of the divided frequency domain subband sets, and reports the selected frequency domain subband set. codebook information, so that multiple beams can be carried in different frequency domains to reduce the overhead of the required CSI-RS. Considering the mutual difference between uplink and downlink channels, the embodiments of the present application further compress codebook overhead, improve feedback efficiency, and improve system robustness by estimating the characteristics of space domain and time delay (DFT transform domain) from the uplink channel SRS.

An embodiment of the present application further proposes a method for receiving a codebook. FIG. 6 is a schematic flowchart of a method 600 for receiving a codebook according to an embodiment of the present application. The method can optionally be applied to the system shown in FIG. 1 . But it doesn't stop there. The method includes at least some of the following.

S610: The network device receives codebook information of the frequency domain subband set selected by the terminal device, where the codebook information includes at least one of the following:

Optionally, the above-mentioned frequency domain vector includes a first frequency domain vector and/or a second frequency domain vector.

Optionally, the length of the first frequency domain vector and the number of selectable values are K, where K is the number of selected frequency domain subband sets.

Optionally, the selectable values of the above-mentioned first frequency domain vector include:

A vector of elements in each row or column of an identity matrix of order K; or,

A vector of elements in each row or column of a Hadamard matrix of order K.

Optionally, the above-mentioned first frequency domain vector is a discrete Fourier transform DFT vector.

Optionally, the above-mentioned first frequency domain vector is represented by the first indication information;

The length of the first indication information is determined by at least one of the following items: K; the number of first frequency domain vectors included in the codebook information; the number of non-zero coefficients; and the number of layers.

Optionally, the length of the above-mentioned first indication information is

or

Optionally, the above-mentioned first frequency domain vector is represented by one piece of first indication information for each layer;

The length of the first indication information corresponding to each layer is

Wherein, M _l is the number of the first frequency domain vectors of the lth layer included in the codebook information.

Optionally, the above-mentioned first frequency domain vector is represented by at least two pieces of first indication information, and each first indication information corresponds to the first frequency domain vector of a partial layer included in the codebook information.

Optionally, the above-mentioned first frequency domain vector is represented by the second indication information and the third indication information;

The length of the second indication information is

Wherein, M ₀ is a parameter determined by a higher layer or a parameter determined by a terminal device;

The length of the third indication information is

Optionally, the above-mentioned first frequency domain vector is represented by the fourth indication information and the fifth indication information;

The length of the fourth indication information is

The length of the fifth indication information is

Among them, v is the number of layers; K _W is the window length of the first frequency domain vector of each layer from the starting position, and M is the number of the first frequency domain vector of each layer contained in the codebook information.

Optionally, the length of the second frequency domain vector and the number of possible values are N, where N is the number of frequency domain units included in each frequency domain subband set.

Optionally, the above-mentioned second frequency domain vector is a vector whose length is N and the value of each element is a fixed value.

Optionally, the above-mentioned second frequency domain vector is a discrete Fourier transform DFT vector.

Optionally, the above-mentioned second frequency domain vector is represented by the sixth indication information;

The length of the sixth indication information is determined by at least one of the following: N; the number of second frequency domain vectors included in the codebook information; the number of layers; and the layer sequence number.

Optionally, the length of the above-mentioned sixth indication information is

in,

M is the number of second frequency domain vectors included in the codebook information.

Optionally, the length of the above-mentioned sixth indication information is

Wherein, M is the number of second frequency domain vectors of each layer included in the codebook information; v is the number of layers.

Optionally, the above-mentioned second frequency domain vector is represented by the seventh indication information and the eighth indication information;

The length of the seventh indication information is

The length of the eighth indication information is

Optionally, the above-mentioned port selection vector is represented by ninth indication information; the length of the ninth indication information is determined by at least one of the following: N ₁ ; N ₂ ; the number of port selection vectors included in the codebook information; the number of layers; Among them, N ₁ is the number of antenna ports in the horizontal direction, and N ₂ is the number of antenna ports in the vertical direction.

Optionally, the length of the above ninth indication information is

or

in,

2L is the number of port selection vectors included in the codebook information.

Optionally, the length of the above ninth indication information is

or

Optionally, the above-mentioned port selection vector is represented by one ninth indication information for each layer;

The length of the ninth indication information corresponding to each layer is

or

Optionally, the above port selection vector is represented by at least two ninth indication information, and each ninth indication information corresponds to a port selection vector of a part of the layers included in the codebook information.

Optionally, the above-mentioned port selection vector is represented by the tenth indication information and the eleventh indication information;

The length of the tenth indication information is

or

Wherein, N ₁ is the number of antenna ports in the horizontal direction, N ₂ is the number of antenna ports in the vertical direction, and L ₀ is a parameter determined by a high layer or a parameter determined by a terminal device;

The length of the eleventh indication information is

Optionally, the above-mentioned port selection vector is represented by the twelfth indication information and the thirteenth indication information;

The length of the twelfth indication information is

or

The twelfth indication information is used to indicate the starting position of the port selection vector of each layer included in the codebook information; wherein, N ₁ is the number of antenna ports in the horizontal direction, and N ₂ is the number of antenna ports in the vertical direction;

The length of the thirteenth indication information is

or

Among them, v is the number of layers, L _W is the window length of the port selection vector of each layer from the starting position, and 2L is the number of port selection vectors of each layer contained in the codebook information.

Optionally, the above codebook information further includes non-zero coefficient position information.

Optionally, the above-mentioned non-zero coefficient position information is represented by the fourteenth indication information;

The length of the fourteenth indication information is

or

Optionally, each layer of the above-mentioned non-zero coefficient position information is represented by one fourteenth indication information;

Optionally, the above-mentioned non-zero coefficient position information is represented by at least two fourteenth indication information, and each fourteenth indication information corresponds to the non-zero coefficient position of some layers included in the non-zero coefficient position information.

Optionally, the above-mentioned non-zero coefficient position information is represented by the fifteenth indication information and the sixteenth indication information;

The length of the fifteenth indication information is

or

The length of the sixteenth indication information is

Optionally, the above-mentioned terminal device receives the sum of non-zero coefficients.

Optionally, the length of the sum of the above non-zero coefficients is

or

The indication information of ; wherein, K ₀ is the maximum number of non-zero coefficients.

Optionally, the above method further comprises: receiving a non-zero coefficient priority from the terminal device.

An embodiment of the present application further proposes a terminal device. FIG. 7 is a schematic structural diagram of a terminal device 700 according to an embodiment of the present application, including:

A division module 710, the application divides the multiple frequency domain subbands into at least one frequency domain subband set, and each frequency domain subband set includes a plurality of frequency domain units;

a selection module 720, configured to select part or all of the frequency domain subband sets from the at least one frequency domain subband set;

A sending module 730, configured to send codebook information of the selected frequency domain subband set, where the codebook information includes at least one of the following: an identifier of the selected frequency domain subband set; a linear combination corresponding to the selected frequency domain subband set coefficient LCC; port selection vector; frequency domain vector.

Optionally, the foregoing dividing module 710 is configured to: divide the N ₃ PMI subbands into 0 ₃ frequency domain subband sets, each frequency domain subband set includes N PMI subbands, and each PMI subband includes 1 frequency domain units; wherein, N ₃ is a positive integer; O ₃ is a positive integer; N is equal to N ₃ /O ₃ .

Optionally, the above-mentioned dividing module 710 is used for: dividing the PMI subband whose sequence number is i+ _m03 into a frequency domain subband set whose sequence number is i; wherein, the sequence numbers of the N ₃ PMI subbands are respectively [ 0, N ₃ ) is an integer in the range; i is an integer in the [0, O ₃ ) range; m is an integer in the [0, N) range.

Optionally, the above-mentioned dividing module 710 is used for: dividing N ₃ PMI subbands, respectively dividing each PMI subband into ₀₃ frequency domain units; respectively extracting the same sequence number from each PMI subband The frequency domain unit, the frequency domain unit with the same serial number is formed into a frequency domain subband set, and O ₃ frequency domain subband sets are obtained, and each frequency domain subband set includes N frequency domain units; wherein, N ₃ is positive Integer; O ₃ is a positive integer; N equals N ₃ .

Optionally, the above-mentioned dividing module 710 is used for:

The N ₃ CQI subbands are divided, and each CQI subband is divided into 0 ₃ frequency domain units respectively; the frequency domain units with the same sequence number are extracted from each CQI subband, and the frequency domain units with the same sequence number are respectively extracted. The units form a frequency domain subband set, and O ₃ frequency domain subband sets are obtained, and each frequency domain subband set includes N ₃ frequency domain units; wherein, N ₃ is a positive integer; O ₃ is a positive integer; N equals to N ₃ .

Optionally, the above terminal device, wherein,

N ₃ =N _sb R,

R∈{1,2,4,...,2 ⁿ }, and satisfy

or

R is a parameter determined by the high layer;

N _sb is the number of CQI subbands;

are predetermined parameters;

n is an integer.

Optionally, the above O ₃ is a parameter determined by a high layer or a fixed parameter.

Optionally, the value manner of the above O ₃ is at least one of the following:

O ₃ =R;

When R=4, O ₃ ∈ {2,4}; when R=2, O ₃ =2;

O ₃ =2;

O ₃ =4;

O ₃ =R/2 ^m , where m is an integer;

O ₃ satisfies mod(N ₃ , O ₃ )=0;

When N ₃ <T, O ₃ =1; otherwise, O ₃ >1;

When _N1N2 <T or _2N1N2 <T or 2L<T or K0 _< T, _O3 ₌ ₁ _; when _N1N2≥T or _2N1N2≥T or _2L≥T or K When ₀ ≥ T, O ₃ >1; among them, N ₁ is the number of antenna ports in the horizontal direction, N ₂ is the number of antenna ports in the vertical direction, T is the preset threshold, L is the number of beams, and K ₀ is the maximum non-zero coefficient. number.

Optionally, the above O ₃ =2 ^m and

where m and n are integers.

Optionally, the above O ₃ =2 ^m and

where m is an integer.

Optionally, the above-mentioned selection module 720 is used for:

The device selects K frequency domain subband sets from at least one frequency domain subband set according to at least one of high layer parameter configuration, predetermined selection method and dynamic indication information, where K is a positive integer.

A vector of elements in each row or column of a Hadamard matrix of order K.

Optionally, the length of the above-mentioned first indication information is

or K; where,

M is the number of the first frequency domain vectors included in the codebook information;

K _nz is the number of non-zero coefficients.

Optionally, the length of the above-mentioned first indication information is

or

The length of the first indication information corresponding to each layer is

Optionally, the above-mentioned first frequency domain vector is represented by at least two pieces of first indication information, and each of the first indication information corresponds to the first frequency domain vector of a partial layer included in the codebook information.

The length of the second indication information is

The length of the third indication information is

The length of the fourth indication information is

The length of the fifth indication information is

Optionally, the length of the second frequency domain vector and the number of possible values are N.

The length of the sixth indication information is determined by at least one of the following:

N;

the number of second frequency domain vectors included in the codebook information;

layers;

Layer serial number.

Optionally, the length of the above-mentioned sixth indication information is

in,

Optionally, the length of the above-mentioned sixth indication information is

in,

v is the number of layers.

The length of the seventh indication information is

The length of the eighth indication information is

Optionally, the above-mentioned port selection vector is represented by ninth indication information;

The length of the ninth indication information is determined by at least one of the following: N ₁ ; N ₂ ; the number of port selection vectors included in the codebook information; the number of layers; wherein, N ₁ is the number of antenna ports in the horizontal direction, and N ₂ is the vertical direction Number of directional antenna ports.

Optionally, the length of the above ninth indication information is

or

in,

Optionally, the length of the above ninth indication information is

or

in,

2L is the number of port selection vectors of each layer included in the codebook information.

v is the number of layers.

The length of the ninth indication information corresponding to each layer is

or

in,

2L _l is the number of port selection vectors of the lth layer included in the codebook information.

N ₁ is the number of antenna ports in the horizontal direction;

N ₂ is the number of antenna ports in the vertical direction.

The length of the tenth indication information is

or

The length of the eleventh indication information is

The length of the twelfth indication information is

or

The length of the thirteenth indication information is

or

The length of the fourteenth indication information is

2LM,

or

in,

M is the number of the first frequency domain vectors of each layer included in the codebook information;

K _nz is the number of non-zero coefficients of each layer included in the codebook information.

The length of the fifteenth indication information is

or

The length of the sixteenth indication information is

Optionally, the above-mentioned sending module 730 is further configured to send the sum of non-zero coefficients.

Optionally, the length of the sum of the above non-zero coefficients is

or

Optionally, the above-mentioned sending module 730 is further configured to send the non-zero coefficient priority.

It should be understood that the above and other operations and/or functions of the modules in the terminal device according to the embodiments of the present application are respectively to implement the corresponding process of the terminal device in the method 200 in FIG. 2 , and are not repeated here for brevity.

An embodiment of the present application further proposes a network device. FIG. 8 is a schematic structural diagram of a network device 800 according to an embodiment of the present application, including:

The receiving module 810 is configured to receive codebook information of the frequency domain subband set selected by the terminal device, where the codebook information includes at least one of the following:

A vector of elements in each row or column of a Hadamard matrix of order K.

Optionally, the above-mentioned first frequency domain vector is represented by first indication information;

Optionally, the length of the above-mentioned first indication information is

or K; where,

K _nz is the number of non-zero coefficients.

Optionally, the length of the above-mentioned first indication information is

or

in,

v is the number of layers.

The length of the first indication information corresponding to each layer is

in,

The length of the second indication information is

The length of the third indication information is

The length of the fourth indication information is

The length of the fifth indication information is

Optionally, the length of the above-mentioned sixth indication information is

in,

Optionally, the length of the above-mentioned sixth indication information is

in,

v is the number of layers.

The length of the seventh indication information is

The length of the eighth indication information is

Optionally, the length of the above ninth indication information is

or

in,

Optionally, the length of the above ninth indication information is

or

in,

v is the number of layers.

The length of the ninth indication information corresponding to each layer is

or

in,

N ₁ is the number of antenna ports in the horizontal direction;

N ₂ is the number of antenna ports in the vertical direction.

The length of the tenth indication information is

or

The length of the eleventh indication information is

The length of the twelfth indication information is

or

The length of the thirteenth indication information is

or

The length of the fourteenth indication information is

2LM,

or

in,

The length of the fifteenth indication information is

or

The length of the sixteenth indication information is

Optionally, the above receiving module 810 is further configured to receive the sum of non-zero coefficients from the terminal device.

Optionally, the length of the sum of the above non-zero coefficients is

or

Optionally, the foregoing receiving module 810 is further configured to receive the non-zero coefficient priority from the terminal device.

It should be understood that the above and other operations and/or functions of the modules in the network device according to the embodiments of the present application are respectively to implement the corresponding flow of the network device in the method 600 in FIG. 6 , and are not repeated here for brevity.

FIG. 9 is a schematic structural diagram of a communication device 900 according to an embodiment of the present application. The communication device 900 shown in FIG. 9 includes a processor 910, and the processor 910 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. 9 , the communication device 900 may further include a memory 920 . The processor 910 may call and run a computer program from the memory 920 to implement the methods in the embodiments of the present application.

The memory 920 may be a separate device independent of the processor 910 , or may be integrated in the processor 910 .

Optionally, as shown in FIG. 9 , the communication device 900 may further include a transceiver 930, and the processor 910 may control the transceiver 930 to communicate with other devices, specifically, may send information or data to other devices, or receive other Information or data sent by the device.

Among them, the transceiver 930 may include a transmitter and a receiver. The transceiver 930 may further include antennas, and the number of the antennas may be one or more.

Optionally, the communication device 900 may be a terminal device of this embodiment of the present application, and the communication device 900 may implement corresponding processes implemented by the terminal device in each method of the embodiment of the present application, which is not repeated here for brevity.

Optionally, the communication device 900 may be a network device in this embodiment of the present application, and the communication device 900 may implement the corresponding processes implemented by the network device in each method in this embodiment of the present application, which is not repeated here for brevity.

FIG. 10 is a schematic structural diagram of a chip 1000 according to an embodiment of the present application. The chip 1000 shown in FIG. 10 includes a processor 1010, and the processor 1010 can call and run a computer program from a memory, so as to implement the method in this embodiment of the present application.

Optionally, as shown in FIG. 10 , the chip 1000 may further include a memory 1020 . The processor 1010 may call and run a computer program from the memory 1020 to implement the methods in the embodiments of the present application.

The memory 1020 may be a separate device independent of the processor 1010, or may be integrated in the processor 1010.

Optionally, the chip 1000 may further include an input interface 1030 . The processor 1010 can control the input interface 1030 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.

Optionally, the chip 1000 may further include an output interface 1040 . The processor 1010 may control the output interface 1040 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

Optionally, the chip can be applied to the terminal device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application, which is not repeated here for brevity.

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 each method of the embodiment of the present application, which is not repeated here for brevity.

It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-a-chip, or the like.

The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an off-the-shelf programmable gate array (field programmable gate array, FPGA), an application specific integrated circuit (ASIC) or Other programmable logic devices, transistor logic devices, discrete hardware components, etc. The general-purpose processor mentioned above may be a microprocessor or any conventional processor or the like.

The memory mentioned above may be either volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory (RAM).

It should be understood that the above memory is an example but not a limitative description, 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) and so on. That is, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the procedures or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored on or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted over a wire from a website site, computer, server or data center (eg coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (eg infrared, wireless, microwave, etc.) means to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc., that includes one or more available media integrated. The available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), and the like.

It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art who is familiar with the technical scope disclosed in the present application can easily think of changes or substitutions, which should be covered within the scope of the present application. within the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A codebook sending method, comprising:

The terminal device divides the plurality of frequency domain subbands into at least one frequency domain subband set, and each of the frequency domain subband sets includes a plurality of frequency domain units;

The terminal device selects part or all of the frequency domain subband sets from the at least one frequency domain subband set, and sends codebook information of the selected frequency domain subband set, where the codebook information includes at least one of the following:

the identifier of the selected frequency domain subband set;

the linear combining coefficient LCC corresponding to the selected set of frequency domain subbands;

port selection vector;

frequency domain vector.
The method according to claim 1, wherein the terminal device divides a plurality of frequency domain subbands into at least one frequency domain subband set, each of the frequency domain subband sets comprising a plurality of frequency domain units comprising:

The terminal device divides the N 3 PMI subbands into 0 3 frequency domain subband sets, each of the frequency domain subband sets includes N PMI subbands, and each of the PMI subbands includes 1 of the frequency domain subbands unit; of which,

The N 3 is a positive integer;

The O 3 is a positive integer;

The N is equal to N 3 /O 3 .
The method according to claim 2, wherein the terminal device divides N 3 PMI subbands into O 3 frequency domain subband sets, including:

Divide the PMI subband whose sequence number is i+mO 3 into the frequency domain subband set whose sequence number is i; wherein,

The sequence numbers of the N 3 PMI subbands are respectively integers in the range of [0, N 3 );

The i is an integer in the range of [0, O 3 );

The m is an integer in the range of [0,N).
The method according to claim 1, wherein the terminal device divides a plurality of frequency domain subbands into at least one frequency domain subband set, each of the frequency domain subband sets comprising a plurality of frequency domain units comprising:

The terminal equipment divides N 3 PMI subbands, and divides each of the PMI subbands into 0 3 frequency domain units respectively;

The frequency domain units with the same sequence number are extracted from each of the PMI subbands respectively, and the frequency domain units with the same sequence number are formed into a frequency domain subband set to obtain 0 3 frequency domain subband sets, each of the frequency domain subband sets. The domain subband set includes N frequency domain units; wherein,

The N 3 is a positive integer;

The O 3 is a positive integer;

The N is equal to N 3 .
The method according to claim 1, wherein the terminal device divides a plurality of frequency domain subbands into at least one frequency domain subband set, each of the frequency domain subband sets comprising a plurality of frequency domain units comprising:

The terminal equipment divides N 3 CQI subbands, and divides each CQI subband into 0 3 frequency domain units respectively;

The frequency domain units with the same sequence number are extracted from each of the CQI subbands respectively, and the frequency domain units with the same sequence number are formed into a frequency domain subband set to obtain 0 3 frequency domain subband sets, each of the frequency domain subband sets. The domain subband set includes N 3 frequency domain units; wherein,

The N 3 is a positive integer;

The O 3 is a positive integer;

The N is equal to N 3 .
The method according to any one of claims 2 to 5, wherein,

The N 3 =N sb R,

The R∈{1,2,4,..., 2n }, and satisfy
or

The R is a parameter determined by the high layer;

The N sb is the number of CQI subbands;

said
are predetermined parameters;

The n is an integer.
The method according to claim 6, wherein the O 3 is a parameter determined by a high layer or a fixed parameter.
The method according to claim 6 or 7, wherein the value of O 3 is at least one of the following:

O 3 =R;

When R=4, the O 3 ∈ {2,4}; when R=2, the O 3 =2;

O 3 =2;

O 3 =4;

O 3 =R/2 m , where m is an integer;

The O 3 satisfies mod(N 3 , O 3 )=0;

When N 3 <T, O 3 =1; otherwise, O 3 >1;

When N1N2 <T or 2N1N2 <T or 2L<T or K0 < T, O3 = 1 ; when N1N2≥T or 2N1N2≥T or 2L≥T or K When 0 ≥ T, O 3 >1; wherein, N 1 is the number of antenna ports in the horizontal direction, N 2 is the number of antenna ports in the vertical direction, T is a preset threshold, and L is the number of beams, The K 0 is the maximum number of non-zero coefficients.
The method of claim 6 or 7, wherein the O 3 =2 m and
Wherein, the m and n are integers.
The method of claim 6 or 7, wherein the O 3 =2 m and
Wherein, the m is an integer.
The method according to any one of claims 1 to 10, wherein the terminal device selects part or all of the frequency domain subband sets from the at least one frequency domain subband set, comprising:

The terminal device selects K frequency domain subband sets from the at least one frequency domain subband set according to at least one of high-level parameter configuration, predetermined selection method and dynamic indication information, where K is a positive integer.
The method according to any one of claims 2 to 11, wherein the frequency domain vector comprises a first frequency domain vector and/or a second frequency domain vector.
The method according to claim 12, wherein the length of the first frequency-domain vector and the number of selectable values are K, and K is the number of the selected frequency-domain subband sets.
The method according to claim 13, wherein the selectable values of the first frequency domain vector include:

A vector of elements in each row or column of an identity matrix of order K; or,

A vector of elements in each row or column of a Hadamard matrix of order K.
The method of claim 13, wherein the first frequency domain vector is a discrete Fourier transform DFT vector.
The method according to any one of claims 13 to 15, wherein the first frequency domain vector is represented by first indication information;

The length of the first indication information is determined by at least one of the following:

the K;

the number of first frequency domain vectors included in the codebook information;

the number of non-zero coefficients;

layers.
The method according to claim 16, wherein the length of the first indication information is

or K; where,

The M is the number of the first frequency domain vectors included in the codebook information;

The K nz is the number of the non-zero coefficients.
The method according to claim 16, wherein the length of the first indication information is

or
in,

The M is the number of the first frequency domain vectors of each layer included in the codebook information;

The v is the number of layers.
The method according to any one of claims 13 to 15, wherein the first frequency domain vector is represented by one first indication information for each layer;

The length of the first indication information corresponding to each layer is
in,

The M 1 is the number of the first frequency domain vectors of the 1 th layer included in the codebook information.
The method according to any one of claims 13 to 15, wherein the first frequency domain vector is represented by at least two first indication information, and each of the first indication information corresponds to a part included in the codebook information The first frequency domain vector of the layer.
The method according to any one of claims 13 to 15, wherein the first frequency domain vector is represented by second indication information and third indication information;

The length of the second indication information is
Wherein, the M 0 is a parameter determined by a high layer or a parameter determined by the terminal device;

The length of the third indication information is
Wherein, the v is the number of layers, and the M is the number of the first frequency domain vectors of each layer included in the codebook information.
The method according to any one of claims 13 to 15, wherein the first frequency domain vector is represented by fourth indication information and fifth indication information;

The length of the fourth indication information is
The fourth indication information is used to indicate the starting position of the first frequency domain vector of each layer included in the codebook information;

The length of the fifth indication information is
Wherein, the v is the number of layers; the K W is the window length of the first frequency domain vector of each layer starting from the starting position, and the M is the first frequency of each layer included in the codebook information. A number of frequency domain vectors.
The method according to claim 12, wherein the length of the second frequency domain vector and the number of possible values are the N.
The method according to claim 23, wherein the second frequency domain vector is a vector with a length of N and the value of each element is a fixed value.
The method of claim 23, wherein the second frequency domain vector is a discrete Fourier transform DFT vector.
The method according to claim 23 or 25, wherein the second frequency domain vector is represented by sixth indication information;

The length of the sixth indication information is determined by at least one of the following: the N; the number of second frequency domain vectors included in the codebook information; the number of layers; and the layer sequence number.
The method according to claim 26, wherein the length of the sixth indication information is
in,

The M is the number of second frequency domain vectors included in the codebook information.
The method according to claim 26, wherein the length of the sixth indication information is
in,

The M is the number of second frequency domain vectors of each layer included in the codebook information;

The v is the number of layers.
The method according to claim 23 or 25, wherein the second frequency domain vector is represented by seventh indication information and eighth indication information;

The length of the seventh indication information is
Wherein, the M 0 is a parameter determined by a high layer or a parameter determined by the terminal device;

The length of the eighth indication information is
Wherein, the v is the number of layers, and the M is the number of second frequency domain vectors of each layer included in the codebook information.
The method according to any one of claims 1 to 29, wherein the port selection vector is represented by ninth indication information;

The length of the ninth indication information is determined by at least one of the following: N 1 ; N 2 ; the number of port selection vectors included in the codebook information; the number of layers; wherein, the N 1 is a horizontal direction antenna port number, the N 2 is the number of antenna ports in the vertical direction.
The method according to claim 30, wherein the length of the ninth indication information is
or
in,

The 2L is the number of port selection vectors included in the codebook information.
The method according to claim 30, wherein the length of the ninth indication information is

or
in,

The 2L is the number of port selection vectors of each layer included in the codebook information;

The v is the number of layers.
The method according to any one of claims 1 to 29, wherein the port selection vector is represented by one ninth indication information for each layer;

The length of the ninth indication information corresponding to each layer is
or
in,

The 2L 1 is the number of port selection vectors of the 1 th layer included in the codebook information;

The N 1 is the number of antenna ports in the horizontal direction;

The N 2 is the number of antenna ports in the vertical direction.
The method according to any one of claims 1 to 29, wherein the port selection vector is represented by at least two ninth indication information, and each of the ninth indication information corresponds to a part of the layer included in the codebook information. Port selection vector.
The method according to any one of claims 1 to 29, wherein the port selection vector is represented by tenth indication information and eleventh indication information;

The length of the tenth indication information is
or
Wherein, the N 1 is the number of antenna ports in the horizontal direction, the N 2 is the number of antenna ports in the vertical direction, and the L 0 is a parameter determined by a high layer or a parameter determined by the terminal device;

The length of the eleventh indication information is
Wherein, the v is the number of layers, and the 2L is the number of port selection vectors of each layer included in the codebook information.
The method according to any one of claims 1 to 29, wherein the port selection vector is represented by the twelfth indication information and the thirteenth indication information;

The length of the twelfth indication information is
or
The twelfth indication information is used to indicate the starting position of the port selection vector of each layer included in the codebook information; wherein, the N 1 is the number of antenna ports in the horizontal direction, and the N 2 is the antenna in the vertical direction number of ports;

The length of the thirteenth indication information is
or
Wherein, the v is the number of layers, the L W is the window length of the port selection vector of each layer from the starting position, and the 2L is the port selection vector of each layer included in the codebook information number of.
The method of any one of claims 12 to 36, wherein the codebook information further includes non-zero coefficient position information.
The method according to claim 37, wherein the non-zero coefficient position information is represented by fourteenth indication information;

The length of the fourteenth indication information is
2LM,
or
in,

The L is the number of beams;

The K 0 is the maximum number of non-zero coefficients;

The M is the number of the first frequency domain vectors included in the codebook information;

The N 1 is the number of antenna ports in the horizontal direction;

The N 2 is the number of antenna ports in the vertical direction;

The K nz is the number of non-zero coefficients.
The method according to claim 37, wherein each layer of the non-zero coefficient position information is represented by one fourteenth indication information;

The length of the fourteenth indication information corresponding to each layer is
in,

The M is the number of the first frequency domain vectors of each layer included in the codebook information;

The K nz is the number of non-zero coefficients of each layer included in the codebook information.
The method according to claim 37, wherein the non-zero coefficient position information is represented by at least two fourteenth indication information, and each of the fourteenth indication information corresponds to a part included in the non-zero coefficient position information The non-zero coefficient position of the layer.
The method according to claim 37, wherein the non-zero coefficient position information is represented by fifteenth indication information and sixteenth indication information;

The length of the fifteenth indication information is
or
Wherein, the L is the number of beams, the M is the number of the first frequency domain vectors of each layer included in the codebook information, and the K nz,0 is a parameter determined by the high layer or by the parameters determined by the terminal device;

The length of the sixteenth indication information is
Wherein, the v is the number of layers, and the K nz,i is the number of non-zero coefficients of the ith layer included in the codebook information.
The method according to any one of claims 1 to 41, further comprising: the terminal device sending a sum of non-zero coefficients.
The method of claim 42, further comprising: the sum of the non-zero coefficients takes a length of
or
where the K 0 is the maximum number of non-zero coefficients.
The method according to any one of claims 1 to 43, further comprising: the terminal device sending a non-zero coefficient priority.
A codebook receiving method, comprising:

The network device receives codebook information of the frequency domain subband set selected by the terminal device, where the codebook information includes at least one of the following:

the identifier of the selected frequency domain subband set;

the linear combining coefficient LCC corresponding to the selected set of frequency domain subbands;

port selection vector;

frequency domain vector.
The method of claim 45, wherein the frequency domain vector comprises a first frequency domain vector and/or a second frequency domain vector.
The method according to claim 46, wherein the length of the first frequency domain vector and the number of selectable values are K, where K is the number of the selected frequency domain subband sets.
The method of claim 47, wherein the selectable values of the first frequency domain vector include:

A vector of elements in each row or column of an identity matrix of order K; or,

A vector of elements in each row or column of a Hadamard matrix of order K.
The method of claim 46, wherein the first frequency domain vector is a discrete Fourier transform DFT vector.
The method according to any one of claims 46 to 49, wherein the first frequency domain vector is represented by first indication information;

The length of the first indication information is determined by at least one of the following: the K; the number of first frequency domain vectors included in the codebook information; the number of non-zero coefficients; and the number of layers.
The method according to claim 50, wherein the length of the first indication information is

or K; where,

The M is the number of the first frequency domain vectors included in the codebook information;

The K nz is the number of the non-zero coefficients.
The method according to claim 50, wherein the length of the first indication information is

or
in,

The M is the number of the first frequency domain vectors of each layer included in the codebook information;

The v is the number of layers.
The method according to any one of claims 46 to 49, wherein the first frequency domain vector is represented by one first indication information for each layer;

The length of the first indication information corresponding to each layer is
in,

The M 1 is the number of the first frequency domain vectors of the 1 th layer included in the codebook information.
The method according to any one of claims 46 to 49, wherein the first frequency domain vector is represented by at least two pieces of first indication information, and each of the first indication information corresponds to a part included in the codebook information The first frequency domain vector of the layer.
The method according to any one of claims 46 to 49, wherein the first frequency domain vector is represented by second indication information and third indication information;

The length of the second indication information is
Wherein, the M 0 is a parameter determined by a high layer or a parameter determined by the terminal device;

The length of the third indication information is
Wherein, the v is the number of layers, and the M is the number of first frequency domain vectors of each layer included in the codebook information.
The method according to any one of claims 46 to 49, wherein the first frequency domain vector is represented by fourth indication information and fifth indication information;

The length of the fourth indication information is
The fourth indication information is used to indicate the starting position of the first frequency domain vector of each layer included in the codebook information;

The length of the fifth indication information is
Wherein, the v is the number of layers; the K W is the window length of the first frequency domain vector of each layer starting from the starting position, and the M is the first frequency of each layer included in the codebook information. A number of frequency domain vectors.
The method according to claim 46, wherein the length of the second frequency-domain vector and the number of possible values are N, and N is the number of frequency-domain units included in each of the frequency-domain subband sets number.
The method according to claim 57, wherein the second frequency domain vector is a vector with a length of N and the value of each element is a fixed value.
The method of claim 57, wherein the second frequency domain vector is a discrete Fourier transform DFT vector.
The method according to claim 57 or 59, wherein the second frequency domain vector is represented by sixth indication information;

The length of the sixth indication information is determined by at least one of the following: the N; the number of second frequency domain vectors included in the codebook information; the number of layers; and the layer sequence number.
The method according to claim 60, wherein the length of the sixth indication information is
in,

The M is the number of second frequency domain vectors included in the codebook information.
The method according to claim 60, wherein the length of the sixth indication information is
in,

The M is the number of second frequency domain vectors of each layer included in the codebook information;

The v is the number of layers.
The method according to claim 57 or 59, wherein the second frequency domain vector is represented by seventh indication information and eighth indication information;

The length of the seventh indication information is
Wherein, the M 0 is a parameter determined by a high layer or a parameter determined by the terminal device;

The length of the eighth indication information is
Wherein, the v is the number of layers, and the M is the number of second frequency domain vectors of each layer included in the codebook information.
The method according to any one of claims 45 to 63, wherein the port selection vector is represented by ninth indication information;

The length of the ninth indication information is determined by at least one of the following: N 1 ; N 2 ; the number of port selection vectors included in the codebook information; the number of layers; wherein, the N 1 is a horizontal direction antenna port number, the N 2 is the number of antenna ports in the vertical direction.
The method according to claim 64, wherein the length of the ninth indication information is
or
in,

The 2L is the number of port selection vectors included in the codebook information.
The method according to claim 64, wherein the length of the ninth indication information is

or
in,

The 2L is the number of port selection vectors of each layer included in the codebook information;

The v is the number of layers.
The method according to any one of claims 45 to 63, wherein the port selection vector is represented by one ninth indication information for each layer;

The length of the ninth indication information corresponding to each layer is
or
in,

The 2L 1 is the number of port selection vectors of the 1 th layer included in the codebook information;

The N 1 is the number of antenna ports in the horizontal direction;

The N 2 is the number of antenna ports in the vertical direction.
The method according to any one of claims 45 to 63, wherein the port selection vector is represented by at least two ninth indication information, and each of the ninth indication information corresponds to a part of the layer included in the codebook information. Port selection vector.
The method according to any one of claims 45 to 63, wherein the port selection vector is represented by tenth indication information and eleventh indication information;

The length of the tenth indication information is
or
Wherein, the N 1 is the number of antenna ports in the horizontal direction, the N 2 is the number of antenna ports in the vertical direction, and the L 0 is a parameter determined by a high layer or a parameter determined by the terminal device;

The length of the eleventh indication information is
Wherein, the v is the number of layers, and the 2L is the number of port selection vectors of each layer included in the codebook information.
The method according to any one of claims 45 to 63, wherein the port selection vector is represented by the twelfth indication information and the thirteenth indication information;

The length of the twelfth indication information is
or
The twelfth indication information is used to indicate the starting position of the port selection vector of each layer included in the codebook information; wherein, the N 1 is the number of antenna ports in the horizontal direction, and the N 2 is the antenna in the vertical direction number of ports;

The length of the thirteenth indication information is
or
Wherein, the v is the number of layers, the L W is the window length of the port selection vector of each layer from the starting position, and the 2L is the port selection vector of each layer included in the codebook information number of.
The method of any one of claims 46 to 70, wherein the codebook information further includes non-zero coefficient position information.
The method according to claim 71, wherein the non-zero coefficient position information is represented by fourteenth indication information;

The length of the fourteenth indication information is
2LM,
or
in,

The L is the number of beams;

The K 0 is the maximum number of non-zero coefficients;

The M is the number of the first frequency domain vectors included in the codebook information;

The N 1 is the number of antenna ports in the horizontal direction;

The N 2 is the number of antenna ports in the vertical direction;

The K nz is the number of non-zero coefficients.
The method according to claim 71, wherein each layer of the non-zero coefficient position information is represented by one fourteenth indication information;

The length of the fourteenth indication information corresponding to each layer is
in,

The M is the number of the first frequency domain vectors of each layer included in the codebook information;

The K nz is the number of non-zero coefficients of each layer included in the codebook information.
The method according to claim 71, wherein the non-zero coefficient position information is represented by at least two fourteenth indication information, and each of the fourteenth indication information corresponds to a part included in the non-zero coefficient position information The non-zero coefficient position of the layer.
The method according to claim 71, wherein the non-zero coefficient position information is represented by fifteenth indication information and sixteenth indication information;

The length of the fifteenth indication information is
or
Wherein, the L is the number of beams, the M is the number of the first frequency domain vectors of each layer included in the codebook information, and the K nz,0 is a parameter determined by the high layer or by the parameters determined by the terminal device;

The length of the sixteenth indication information is
Wherein, the v is the number of layers, and the K nz,i is the number of non-zero coefficients of the ith layer included in the codebook information.
75. The method of any of claims 46 to 75, further comprising receiving a sum of non-zero coefficients from the terminal device.
The method of claim 76, further comprising: the sum of the non-zero coefficients takes a length of

where the K 0 is the maximum number of non-zero coefficients.
77. The method of any of claims 46 to 77, further comprising receiving a non-zero coefficient priority from the terminal device.
A terminal device including:

a dividing module, configured to divide a plurality of frequency domain subbands into at least one frequency domain subband set, each of the frequency domain subband sets including a plurality of frequency domain units;

a selection module, configured to select part or all of the frequency domain subband sets from the at least one frequency domain subband set;

A sending module, configured to send codebook information of the selected frequency domain subband set, where the codebook information includes at least one of the following:

the identifier of the selected frequency domain subband set;

the linear combining coefficient LCC corresponding to the selected set of frequency domain subbands;

port selection vector;

frequency domain vector.
The terminal device according to claim 79, wherein the dividing module is used to:

dividing the N 3 PMI subbands into 0 3 frequency domain subband sets, each of the frequency domain subband sets including N PMI subbands, and each of the PMI subbands including 1 of the frequency domain units; in,

The N 3 is a positive integer;

The O 3 is a positive integer;

The N is equal to N 3 /O 3 .
The terminal device according to claim 80, wherein the dividing module is used to:

Divide the PMI subband whose sequence number is i+mO 3 into the frequency domain subband set whose sequence number is i; wherein,

The sequence numbers of the N 3 PMI subbands are respectively integers in the range of [0, N 3 );

The i is an integer in the range of [0, O 3 );

The m is an integer in the range of [0,N).
The terminal device according to claim 79, wherein the dividing module is used to:

The N 3 PMI subbands are divided, and each of the PMI subbands is divided into 0 3 frequency domain units;

The frequency domain units with the same sequence number are extracted from each of the PMI subbands respectively, and the frequency domain units with the same sequence number are formed into a frequency domain subband set to obtain 0 3 frequency domain subband sets, each of the frequency domain subband sets. The domain subband set includes N frequency domain units; wherein,

The N 3 is a positive integer;

The O 3 is a positive integer;

The N is equal to N 3 .
The terminal device according to claim 79, wherein the dividing module is used to:

The N 3 CQI subbands are divided, and each CQI subband is divided into 0 3 frequency domain units;

The frequency domain units with the same sequence number are extracted from each of the CQI subbands respectively, and the frequency domain units with the same sequence number are formed into a frequency domain subband set to obtain 0 3 frequency domain subband sets, each of the frequency domain subband sets. The domain subband set includes N 3 frequency domain units; wherein,

The N 3 is a positive integer;

The O 3 is a positive integer;

The N is equal to N 3 .
The terminal device according to any one of claims 80 to 83, wherein,

The N 3 =N sb R,

The R∈{1,2,4,..., 2n }, and satisfy
or

The R is a parameter determined by the high layer;

The N sb is the number of CQI subbands;

said
are predetermined parameters;

The n is an integer.
The terminal device according to claim 84, wherein the O 3 is a parameter determined by a higher layer or a fixed parameter.
The terminal device according to claim 84 or 85, wherein the value of O 3 is at least one of the following:

O 3 =R;

When R=4, the O 3 ∈ {2,4}; when R=2, the O 3 =2;

O 3 =2;

O 3 =4;

O 3 =R/2 m , where m is an integer;

The O 3 satisfies mod(N 3 , O 3 )=0;

When N 3 <T, O 3 =1; otherwise, O 3 >1;

When N1N2 <T or 2N1N2 <T or 2L<T or K0 < T, O3 = 1 ; when N1N2≥T or 2N1N2≥T or 2L≥T or K When 0 ≥ T, O 3 >1; wherein, N 1 is the number of antenna ports in the horizontal direction, N 2 is the number of antenna ports in the vertical direction, T is a preset threshold, and L is the number of beams, The K 0 is the maximum number of non-zero coefficients.
The terminal device of claim 84 or 85, wherein the O 3 =2 m and
Wherein, the m and n are integers.
The terminal device of claim 84 or 85, wherein the O 3 =2 m and
Wherein, the m is an integer.
The terminal device according to any one of claims 79 to 88, wherein the selection module is used for:

The device selects K frequency domain subband sets from the at least one frequency domain subband set according to at least one of high layer parameter configuration, predetermined selection method and dynamic indication information, where K is a positive integer.
The terminal device according to any one of claims 80 to 99, wherein the frequency domain vector includes a first frequency domain vector and/or a second frequency domain vector.
The terminal device according to claim 90, wherein the length of the first frequency domain vector and the number of selectable values are K, and K is the number of the selected frequency domain subband sets.
The terminal device according to claim 91, wherein the selectable values of the first frequency domain vector include:

A vector of elements in each row or column of an identity matrix of order K; or,

A vector of elements in each row or column of a Hadamard matrix of order K.
The terminal device according to claim 91, wherein the first frequency domain vector is a discrete Fourier transform DFT vector.
The terminal device according to any one of claims 91 to 93, wherein the first frequency domain vector is represented by first indication information;

The length of the first indication information is determined by at least one of the following:

the K;

the number of first frequency domain vectors included in the codebook information;

the number of non-zero coefficients;

layers.
The terminal device according to claim 94, wherein the length of the first indication information is

or K; where,

The M is the number of the first frequency domain vectors included in the codebook information;

The K nz is the number of the non-zero coefficients.
The terminal device according to claim 94, wherein the length of the first indication information is

or
in,

The M is the number of the first frequency domain vectors of each layer included in the codebook information;

The v is the number of layers.
The terminal device according to any one of claims 91 to 93, wherein the first frequency domain vector is represented by one piece of first indication information for each layer;

The length of the first indication information corresponding to each layer is
in,

The M 1 is the number of the first frequency domain vectors of the 1 th layer included in the codebook information.
The terminal device according to any one of claims 91 to 93, wherein the first frequency domain vector is represented by at least two pieces of first indication information, and each of the first indication information corresponds to a The first frequency domain vector of the partial layer.
The terminal device according to any one of claims 91 to 93, wherein the first frequency domain vector is represented by second indication information and third indication information;

The length of the second indication information is
Wherein, the M 0 is a parameter determined by a higher layer or a parameter determined by the terminal device;

The length of the third indication information is
Wherein, the v is the number of layers, and the M is the number of first frequency domain vectors of each layer included in the codebook information.
The terminal device according to any one of claims 91 to 93, wherein the first frequency domain vector is represented by fourth indication information and fifth indication information;

The length of the fourth indication information is
The fourth indication information is used to indicate the starting position of the first frequency domain vector of each layer included in the codebook information;

The length of the fifth indication information is
Wherein, the v is the number of layers; the K W is the window length of the first frequency domain vector of each layer starting from the starting position, and the M is the first frequency of each layer included in the codebook information. A number of frequency domain vectors.
The terminal device according to claim 90, wherein the length of the second frequency domain vector and the number of possible values are the N.
The terminal device according to claim 101, wherein the second frequency domain vector is a vector with a length of N and the value of each element is a fixed value.
The terminal device according to claim 101, wherein the second frequency domain vector is a discrete Fourier transform DFT vector.
The terminal device according to claim 101 or 103, wherein the second frequency domain vector is represented by sixth indication information;

The length of the sixth indication information is determined by at least one of the following: the N; the number of second frequency domain vectors included in the codebook information; the number of layers; and the layer sequence number.
The terminal device according to claim 104, wherein the length of the sixth indication information is
in,

The M is the number of second frequency domain vectors included in the codebook information.
The terminal device according to claim 104, wherein the length of the sixth indication information is
in,

The M is the number of second frequency domain vectors of each layer included in the codebook information;

The v is the number of layers.
The terminal device according to claim 101 or 103, wherein the second frequency domain vector is represented by seventh indication information and eighth indication information;

The length of the seventh indication information is
Wherein, the M 0 is a parameter determined by a higher layer or a parameter determined by the terminal device;

The length of the eighth indication information is
Wherein, the v is the number of layers, and the M is the number of second frequency domain vectors of each layer included in the codebook information.
The terminal device according to any one of claims 79 to 107, wherein the port selection vector is represented by ninth indication information;

The length of the ninth indication information is determined by at least one of the following: N 1 ; N 2 ; the number of port selection vectors included in the codebook information; the number of layers; wherein, the N 1 is a horizontal direction antenna port number, the N 2 is the number of antenna ports in the vertical direction.
The terminal device according to claim 108, wherein the length of the ninth indication information is
or
in,

The 2L is the number of port selection vectors included in the codebook information.
The terminal device according to claim 108, wherein the length of the ninth indication information is

or
in,

The 2L is the number of port selection vectors of each layer included in the codebook information;

The v is the number of layers.
The terminal device according to any one of claims 79 to 107, wherein the port selection vector is represented by one ninth indication information for each layer;

The length of the ninth indication information corresponding to each layer is
or
in,

The 2L 1 is the number of port selection vectors of the 1 th layer included in the codebook information;

The N 1 is the number of antenna ports in the horizontal direction;

The N 2 is the number of antenna ports in the vertical direction.
The terminal device according to any one of claims 79 to 107, wherein the port selection vector is represented by at least two ninth indication information, and each of the ninth indication information corresponds to a partial layer included in the codebook information port selection vector.
The terminal device according to any one of claims 79 to 107, wherein the port selection vector is represented by tenth indication information and eleventh indication information;

The length of the tenth indication information is
or
Wherein, the N 1 is the number of antenna ports in the horizontal direction, the N 2 is the number of antenna ports in the vertical direction, and the L 0 is a parameter determined by a high layer or a parameter determined by the terminal device;

The length of the eleventh indication information is
Wherein, the v is the number of layers, and the 2L is the number of port selection vectors of each layer included in the codebook information.
The terminal device according to any one of claims 79 to 107, wherein the port selection vector is represented by the twelfth indication information and the thirteenth indication information;

The length of the twelfth indication information is
or
The twelfth indication information is used to indicate the starting position of the port selection vector of each layer included in the codebook information; wherein, the N 1 is the number of antenna ports in the horizontal direction, and the N 2 is the antenna in the vertical direction number of ports;

The length of the thirteenth indication information is
or
Wherein, the v is the number of layers, the L W is the window length of the port selection vector of each layer from the starting position, and the 2L is the port selection vector of each layer included in the codebook information number of.
The terminal device according to any one of claims 90 to 114, wherein the codebook information further includes non-zero coefficient position information.
The terminal device according to claim 115, wherein the non-zero coefficient position information is represented by fourteenth indication information;

The length of the fourteenth indication information is
2LM,
or
Wherein, the L is the number of beams; the K 0 is the maximum number of non-zero coefficients; the M is the number of the first frequency domain vectors included in the codebook information; the N 1 is the horizontal direction The number of antenna ports; the N 2 is the number of antenna ports in the vertical direction; the K nz is the number of non-zero coefficients.
The terminal device according to claim 115, wherein each layer of the non-zero coefficient position information is represented by one fourteenth indication information;

The length of the fourteenth indication information corresponding to each layer is
in,

The M is the number of the first frequency domain vectors of each layer included in the codebook information;

The K nz is the number of non-zero coefficients of each layer included in the codebook information.
The terminal device according to claim 115, wherein the non-zero coefficient position information is represented by at least two fourteenth indication information, and each of the fourteenth indication information corresponds to the information contained in the non-zero coefficient position information Non-zero coefficient positions for part of the layer.
The terminal device according to claim 115, wherein the non-zero coefficient position information is represented by fifteenth indication information and sixteenth indication information;

The length of the fifteenth indication information is
or
Wherein, the L is the number of beams, the M is the number of the first frequency domain vectors of each layer included in the codebook information, and the K nz,0 is a parameter determined by the high layer or by the parameters determined by the terminal device;

The length of the sixteenth indication information is
Wherein, the v is the number of layers, and the K nz,i is the number of non-zero coefficients of the ith layer included in the codebook information.
The terminal device according to any one of claims 79 to 119, wherein the sending module is further configured to send the sum of non-zero coefficients.
The terminal device according to claim 120, wherein the sum of the non-zero coefficients adopts a length of
or
Wherein, the K 0 is the maximum number of non-zero coefficients.
The terminal device according to any one of claims 79 to 121, wherein the sending module is further configured to send a non-zero coefficient priority.
A network device comprising:

A receiving module, configured to receive codebook information of the frequency domain subband set selected by the terminal device, where the codebook information includes at least one of the following:

the identifier of the selected frequency domain subband set;

the linear combining coefficient LCC corresponding to the selected set of frequency domain subbands;

port selection vector;

frequency domain vector.
The network device of claim 123, wherein the frequency domain vector comprises a first frequency domain vector and/or a second frequency domain vector.
The network device according to claim 124, wherein the length of the first frequency domain vector and the number of selectable values are K, and K is the number of the selected frequency domain subband sets.
The network device according to claim 125, wherein the selectable values of the first frequency domain vector include:

A vector of elements in each row or column of an identity matrix of order K; or,

A vector of elements in each row or column of a Hadamard matrix of order K.
The network device of claim 124, wherein the first frequency domain vector is a discrete Fourier transform DFT vector.
The network device according to any one of claims 124 to 127, wherein the first frequency domain vector is represented by first indication information;

The length of the first indication information is determined by at least one of the following:

the K;

the number of first frequency domain vectors included in the codebook information;

the number of non-zero coefficients;

layers.
The network device according to claim 128, wherein the length of the first indication information is

or K; where,

The M is the number of the first frequency domain vectors included in the codebook information;

The K nz is the number of the non-zero coefficients.
The network device according to claim 128, wherein the length of the first indication information is

or
in,

The M is the number of the first frequency domain vectors of each layer included in the codebook information;

The v is the number of layers.
The network device according to any one of claims 124 to 127, wherein the first frequency domain vector is represented by one first indication information for each layer;

The length of the first indication information corresponding to each layer is
in,

The M 1 is the number of the first frequency domain vectors of the 1 th layer included in the codebook information.
The network device according to any one of claims 124 to 127, wherein the first frequency domain vector is represented by at least two pieces of first indication information, and each of the first indication information corresponds to a The first frequency domain vector of the partial layer.
The network device according to any one of claims 124 to 127, wherein the first frequency domain vector is represented by second indication information and third indication information;

The length of the second indication information is
Wherein, the M 0 is a parameter determined by a higher layer or a parameter determined by the terminal device;

The length of the third indication information is
Wherein, the v is the number of layers, and the M is the number of first frequency domain vectors of each layer included in the codebook information.
The network device according to any one of claims 124 to 127, wherein the first frequency domain vector is represented by fourth indication information and fifth indication information;

The length of the fourth indication information is
The fourth indication information is used to indicate the starting position of the first frequency domain vector of each layer included in the codebook information;

The length of the fifth indication information is
Wherein, the v is the number of layers; the K W is the window length of the first frequency domain vector of each layer starting from the starting position, and the M is the first frequency of each layer included in the codebook information. A number of frequency domain vectors.
The network device according to claim 124, wherein the length of the second frequency-domain vector and the number of possible values are N, and N is the number of frequency-domain units included in each of the frequency-domain subband sets. number.
The network device according to claim 135, wherein the second frequency domain vector is a vector with a length of N and the value of each element is a fixed value.
The network device of claim 135, wherein the second frequency domain vector is a discrete Fourier transform DFT vector.
The network device according to claim 135 or 137, wherein the second frequency domain vector is represented by sixth indication information; the length of the sixth indication information is determined by at least one of the following: the N; the code The number of second frequency domain vectors contained in this information; the number of layers; the layer serial number.
The network device according to claim 138, wherein the length of the sixth indication information is
in,

The M is the number of second frequency domain vectors included in the codebook information.
The network device according to claim 138, wherein the length of the sixth indication information is
in,

The M is the number of second frequency domain vectors of each layer included in the codebook information;

The v is the number of layers.
The network device according to claim 135 or 137, wherein the second frequency domain vector is represented by seventh indication information and eighth indication information;

The length of the seventh indication information is
Wherein, the M 0 is a parameter determined by a high layer or a parameter determined by the terminal device;

The length of the eighth indication information is
Wherein, the v is the number of layers, and the M is the number of second frequency domain vectors of each layer included in the codebook information.
The network device according to any one of claims 123 to 141, wherein the port selection vector is represented by ninth indication information;

The length of the ninth indication information is determined by at least one of the following: N 1 ; N 2 ; the number of port selection vectors included in the codebook information; the number of layers; wherein, the N 1 is a horizontal direction antenna port number, the N 2 is the number of antenna ports in the vertical direction.
The network device according to claim 142, wherein the length of the ninth indication information is
or
The 2L is the number of port selection vectors included in the codebook information.
The network device according to claim 142, wherein the length of the ninth indication information is

or
Wherein, the 2L is the number of port selection vectors of each layer included in the codebook information; the v is the number of layers.
The network device according to any one of claims 123 to 141, wherein the port selection vector is represented by one ninth indication information for each layer;

The length of the ninth indication information corresponding to each layer is
or
Wherein, the 2L 1 is the number of port selection vectors of the first layer included in the codebook information; the N 1 is the number of antenna ports in the horizontal direction; and the N 2 is the number of antenna ports in the vertical direction.
The network device according to any one of claims 123 to 141, wherein the port selection vector is represented by at least two ninth indication information, and each of the ninth indication information corresponds to a partial layer included in the codebook information port selection vector.
The network device according to any one of claims 123 to 141, wherein the port selection vector is represented by tenth indication information and eleventh indication information;

The length of the tenth indication information is
or
Wherein, the N 1 is the number of antenna ports in the horizontal direction, the N 2 is the number of antenna ports in the vertical direction, and the L 0 is a parameter determined by a high layer or a parameter determined by the terminal device;

The length of the eleventh indication information is
Wherein, the v is the number of layers, and the 2L is the number of port selection vectors of each layer included in the codebook information.
The network device according to any one of claims 123 to 141, wherein the port selection vector is represented by the twelfth indication information and the thirteenth indication information;

The length of the twelfth indication information is
or
The twelfth indication information is used to indicate the starting position of the port selection vector of each layer included in the codebook information; wherein, the N 1 is the number of antenna ports in the horizontal direction, and the N 2 is the antenna in the vertical direction number of ports;

The length of the thirteenth indication information is
or
Wherein, the v is the number of layers, the L W is the window length of the port selection vector of each layer from the starting position, and the 2L is the port selection vector of each layer included in the codebook information number of.
The network device according to any one of claims 124 to 148, wherein the codebook information further comprises non-zero coefficient position information.
The network device according to claim 149, wherein the non-zero coefficient position information is represented by fourteenth indication information;

The length of the fourteenth indication information is
2LM,
or
Wherein, the L is the number of beams; the K 0 is the maximum number of non-zero coefficients; the M is the number of the first frequency domain vectors included in the codebook information; the N 1 is the horizontal direction The number of antenna ports; the N 2 is the number of antenna ports in the vertical direction; the K nz is the number of non-zero coefficients.
The network device according to claim 149, wherein each layer of the non-zero coefficient position information is represented by one fourteenth indication information;

The length of the fourteenth indication information corresponding to each layer is
in,

The M is the number of the first frequency domain vectors of each layer included in the codebook information;

The K nz is the number of non-zero coefficients of each layer included in the codebook information.
The network device according to claim 149, wherein the non-zero coefficient position information is represented by at least two fourteenth indication information, and each of the fourteenth indication information corresponds to the information contained in the non-zero coefficient position information Non-zero coefficient positions for part of the layer.
The network device according to claim 149, wherein the non-zero coefficient position information is represented by fifteenth indication information and sixteenth indication information;

The length of the fifteenth indication information is
or
Wherein, the L is the number of beams, the M is the number of the first frequency domain vectors of each layer included in the codebook information, and the K nz,0 is a parameter determined by the high layer or by the parameters determined by the terminal device;

The length of the sixteenth indication information is
Wherein, the v is the number of layers, and the K nz,i is the number of non-zero coefficients of the ith layer included in the codebook information.
The network device according to any one of claims 124 to 153, wherein the receiving module is further configured to receive a sum of non-zero coefficients from the terminal device.
The network device of claim 154, wherein the sum of the non-zero coefficients takes a length of
or
where the K 0 is the maximum number of non-zero coefficients.
The network device according to any one of claims 124 to 155, wherein the receiving module is further configured to receive a non-zero coefficient priority from the terminal device.
A terminal device, 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 executes any one of claims 1 to 44. Methods.
A network device, 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 executes any one of claims 45 to 78. Methods.
A chip, comprising: a processor for invoking and running a computer program from a memory, so that a device on which the chip is installed executes the method as claimed in any one of claims 1 to 44.
A chip comprising: a processor for invoking and running a computer program from a memory to cause a device on which the chip is installed to perform the method as claimed in any one of claims 45 to 78.
A computer-readable storage medium storing a computer program that causes a computer to perform the method of any one of claims 1 to 44.
A computer-readable storage medium storing a computer program that causes a computer to perform the method of any one of claims 45 to 78.
A computer program product comprising computer program instructions that cause a computer to perform the method of any one of claims 1 to 44.
A computer program product comprising computer program instructions that cause a computer to perform the method of any of claims 45 to 78.
A computer program that causes a computer to perform the method of any one of claims 1 to 44.
A computer program which causes a computer to perform the method of any one of claims 45 to 78.