CN116868515A

CN116868515A - Codebook reporting method, terminal equipment and network equipment

Info

Publication number: CN116868515A
Application number: CN202180092945.9A
Authority: CN
Inventors: 黄莹沛; 陈文洪; 史志华; 田杰娇; 方昀
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-03-02
Filing date: 2021-04-02
Publication date: 2023-10-10
Also published as: WO2022183563A1; WO2022183378A1

Abstract

A method for reporting a codebook, a terminal device and a network device, wherein the method comprises the following steps: the method comprises the steps that terminal equipment receives a channel state information reference signal (CSI-RS) resource set sent by network equipment, wherein the CSI-RS resource set comprises Ks CSI-RS resources, each CSI-RS resource comprises at least one CSI-RS port, and Ks is an integer greater than or equal to 1; the terminal equipment determines Channel State Information (CSI) according to the CSI-RS resource set and/or the CSI related parameter, wherein the CSI comprises a Precoding Matrix Indicator (PMI); and the terminal equipment reports the CSI to the network equipment.

Description

Codebook reporting method, terminal equipment and network equipment

The application claims priority from PCT patent application filed by the chinese patent office at 3 months 2 of 2021, application number PCT/CN2021/078731, entitled "codebook reporting method, terminal device and network device", the entire contents of which are incorporated herein by reference.

Technical Field

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

Background

In a New Radio (NR) system, a terminal device may report channel state information (Channel State Information, CSI) on a channel state information reference signal (Channel State Information Reference Signal, CSI-RS), which may include information related to a frequency-space codebook, e.g., W of the frequency-space codebook ₁ DFT vector, W, of L spatial beams _f DFT basis vector of M frequency domains and quantizedAnd the like, codebook overhead is large, so how to reduce the CSI-RS resource overhead is an urgent problem to be solved.

Disclosure of Invention

The application provides a codebook reporting method, terminal equipment and network equipment, which are beneficial to reducing the expenditure of CSI-RS resources.

In a first aspect, a method for reporting a codebook is provided, including: the method comprises the steps that terminal equipment receives a channel state information reference signal (CSI-RS) resource set sent by network equipment, wherein the CSI-RS resource set comprises Ks CSI-RS resources, each CSI-RS resource comprises at least one CSI-RS port, and Ks is an integer greater than or equal to 1; the terminal equipment determines Channel State Information (CSI) according to the CSI-RS resource set and/or the CSI related parameter, wherein the CSI comprises a Precoding Matrix Indicator (PMI); and the terminal equipment reports the CSI to the network equipment.

In a second aspect, a method for reporting a codebook is provided, including: the method comprises the steps that network equipment sends a channel state information reference signal (CSI-RS) resource set to terminal equipment, wherein the CSI-RS resource set comprises Ks CSI-RS resources, each CSI-RS resource comprises at least one CSI-RS port, and Ks is an integer greater than or equal to 1; and the network equipment reports Channel State Information (CSI) to the terminal equipment, wherein the CSI is determined according to the CSI-RS resource set and/or the CSI related parameters, and the CSI comprises a Precoding Matrix Indicator (PMI).

In a third aspect, a terminal device is provided for performing the method in the first aspect or each implementation manner thereof.

Specifically, the terminal device comprises functional modules for performing the method of the first aspect or its implementation manner.

In a fourth aspect, a network device is provided for performing the method of the second aspect or implementations thereof.

In particular, the network device comprises functional modules for performing the method of the second aspect or implementations thereof described above.

In a fifth aspect, a terminal device is provided comprising a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory and executing the method in the first aspect or various implementation manners thereof.

In a sixth aspect, a network device is provided that includes a processor and a memory. The memory is for storing a computer program and the processor is for calling and running the computer program stored in the memory for performing the method of the second aspect or implementations thereof described above.

A seventh aspect provides a chip for implementing the method of any one of the first to second aspects or each implementation thereof.

Specifically, the chip includes: a processor for calling and running a computer program from a memory, causing a device in which the apparatus is installed to perform the method as in any one of the first to second aspects or implementations thereof described above.

In an eighth aspect, a computer-readable storage medium is provided for storing a computer program that causes a computer to perform the method of any one of the above-described first to second aspects or implementations thereof.

A ninth aspect provides a computer program product comprising computer program instructions for causing a computer to perform the method of any one of the first to second aspects or implementations thereof.

In a tenth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of any one of the first to second aspects or implementations thereof.

Through the technical scheme, the network equipment can configure the CSI-RS resource set for the terminal equipment, wherein the CSI-RS resource set comprises at least one CSI-RS resource, the terminal equipment can determine the CSI based on the CSI-RS resource set and/or the CSI-related parameters configured by the network equipment, and further report the CSI to the network equipment through the CSI-RS resource in the CSI-RS resource set, so that the expenditure of the CSI-RS resource can be reduced.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture according to an embodiment of the present application.

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

Fig. 3 is a schematic block diagram of a terminal device according to an embodiment of the present application.

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

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

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

Fig. 7 is a schematic block diagram of a communication system provided in accordance with an embodiment of the present application.

Detailed Description

The following description of the technical solutions according to the embodiments of the present application will be given with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art to which the application pertains without inventive faculty, are intended to fall within the scope of the application.

The technical scheme of the embodiment of the application can be applied to various communication systems, such as: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (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, evolved system of NR system, LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum, NR-U) system on unlicensed spectrum, non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, universal mobile communication system (Universal Mobile Telecommunication System, UMTS), wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, wiFi), fifth Generation communication (5 th-Generation, 5G) system, or other communication system, etc.

Generally, the number of connections supported by the conventional communication system is limited and easy to implement, however, as the communication technology advances, the mobile communication system will support not only conventional communication but also, for example, device-to-Device (D2D) communication, machine-to-machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), inter-vehicle (Vehicle to Vehicle, V2V) communication, or internet of vehicles (Vehicle to everything, V2X) communication, etc., to which the embodiments of the present application can also be applied.

Optionally, the communication system in the 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 Stand Alone (SA) fabric scenario.

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

Embodiments of the present application are described in connection with a network device and a terminal device, where the terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, a User Equipment, or the like.

The terminal device may be a STATION (ST) in a WLAN, may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) STATION, a personal digital assistant (Personal Digital Assistant, PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in a next generation communication system such as an NR network, or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.

In the embodiment of the application, the terminal equipment can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.).

In the embodiment of the present application, the terminal device may be a Mobile Phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented Reality (Augmented Reality, AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned driving (self driving), a wireless terminal device in remote medical (remote medical), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation security (transportation safety), a wireless terminal device in smart city (smart city), or a wireless terminal device in smart home (smart home), and the like.

By way of example, and not limitation, in embodiments of the present application, the terminal device may also be a wearable device. The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wear by applying wearable technology and developing wearable devices, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.

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

By way of example, and not limitation, in embodiments of the present application, a network device may have a mobile nature, e.g., the network device may be a mobile device. Alternatively, the network device may be a satellite, a balloon station. For example, the satellite may be a Low Earth Orbit (LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous orbit (geostationary earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite, or the like. Alternatively, the network device may be a base station disposed on land, in a water area, or the like.

In the embodiment of the present application, a network device may provide services for a cell, where a terminal device communicates with the network device through a transmission resource (e.g., a frequency domain resource, or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the network device (e.g., a base station), and the cell may belong to a macro base station, or may belong to a base station corresponding to a Small cell (Small cell), where the Small cell may include: urban cells (Metro cells), micro cells (Micro cells), pico cells (Pico cells), femto cells (Femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services.

An exemplary communication system 100 to which embodiments of the present application may be applied is shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area.

Fig. 1 illustrates one network device and two terminal devices by way of example, and the communication system 100 may alternatively include multiple network devices and may include other numbers of terminal devices within the coverage area of each network device, as embodiments of the application are not limited in this regard.

Optionally, the communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited by the embodiment of the present application.

It should be understood that a device having a communication function in a network/system according to an embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal device 120 with communication functions, where the network device 110 and the terminal device 120 may be specific devices described above, and are not described herein again; the communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be understood that the "indication" mentioned in the embodiments of the present application may be a direct indication, an indirect indication, or an indication having an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B.

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

In the embodiment of the present application, the "predefining" may be implemented by pre-storing corresponding codes, tables or other manners that may be used to indicate relevant information in devices (including, for example, terminal devices and network devices), and the present application is not limited to the specific implementation manner thereof. Such as predefined may refer to what is defined in the protocol.

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

In order to facilitate understanding of the technical solution of the embodiments of the present application, the technical solution of the present application is described in detail below through specific embodiments. The following related technologies may be optionally combined with the technical solutions of the embodiments of the present application, which all belong to the protection scope of the embodiments of the present application. Embodiments of the present application include at least some of the following.

In order to facilitate understanding of the technical solution of the embodiments of the present application, the following describes the related concepts of the frequency domain-space codebook.

In release 16, for each layer of codebook, the frequency domain-space codebook (also referred to as NR type II codebook, or frequency domain-space joint codebook) is encoded independently in the frequency domain (each subband), and the total feedback amount is too large due to high spatial quantization accuracy, and by feeding back the frequency domain-space joint codebook, the feedback amount can be saved greatly under the condition of ensuring NR performance.

The frequency-space codebook can be expressed as:

Wherein W represents a frequency domain-space codebook, W ₁ Discrete fourier transform (Discrete fourier transformation, DFT) vector representing 2L spatial beams (beams), W _f The DFT basis vectors representing M frequency domains.Represents W _f Is a transpose of (a).Representing the weighting coefficients of the spatial frequency domain pairs,is a matrix of size 2l x m. W (W) ₁ Can be made of 2N ₁ N ₂ *2L represents N ₁ Number of ports in vertical direction, N ₂ The number of ports in the horizontal direction.Can be represented by 2 L.times.M, 2L has a value ofThe number of lines, M, isIs a column number of columns.Can be represented by M.times.N ₃ Representation, N ₃ Is the number of DFT basis vectors in the frequency domain.

When the terminal device feeds back the frequency domain-space codebook to the network device, the content of the channel information (such as channel state information (Channel State Information, CSI)) reported to the network device includes: w (W) ₁ DFT vector, W, of L spatial beams _f DFT basis vector of M frequency domains and quantizedThe network equipment is obtained by integrating the three componentsCSI to each layer downlink.

The port selection (port selection) codebook of Rel 15 or Rel 16 differs from the frequency-space codebook in that W ₁ W in a port selection (Port) codebook ₁ One 1, the rest 0, and the corresponding L ports (ports) are selected by the sampling rate d, d=1, 2,3,4.

For uplink and downlink reciprocal channels based on Frequency division multiplexing (FDD), a base station obtains statistical characteristics of uplink space and time delay through uplink sounding reference signals (Sounding Reference Signal, SRS), determines a precoding matrix of a space and a Frequency domain or a joint precoding matrix, performs precoding on channel state information reference signals (Channel State Information Reference Signal, CSI-RS), estimates the CSI-RS, selects one or more ports, and simultaneously reports amplitude and phase information of the ports. For one port x _i If pre-coding W _i Precoding, W _i The dimension of (f) is f multiplied by Nt, f is the size of the frequency domain precoding, nt is the number of antennas, and the number of antennas is calculated by the base station. The transmitting signal of the transmitting end is

Under the condition that uplink and downlink channels are different, the existing codebook does not consider the joint distribution of multiple-input multiple-output (multiplein multipleout, MIMO) channel space and time delay, the codebook cost is large, and the terminal equipment needs to report the CSI on the CSI-RS resource, wherein the CSI comprises codebook related information, so that how to reduce the CSI-RS resource cost is an urgent problem to be solved.

Fig. 2 is a schematic interaction diagram of a method 200 for codebook reporting according to an embodiment of the present application, as shown in fig. 2, the method 200 includes the following:

S201, a terminal device receives a channel state information reference signal (CSI-RS) resource set sent by a network device, wherein the CSI-RS resource set comprises Ks CSI-RS resources, each CSI-RS resource comprises at least one CSI-RS port, and Ks is an integer greater than or equal to 1;

s202, the terminal equipment determines Channel State Information (CSI) according to the CSI-RS resource set and/or the CSI related parameter, wherein the CSI comprises a Precoding Matrix Indicator (PMI);

and S203, the terminal equipment reports the CSI to the network equipment.

In some embodiments, the network device may configure the set of CSI-RS resources to the terminal device through higher layer signaling (e.g., radio resource control (Radio Resource Control, RRC) signaling).

In some embodiments, the CSI-related parameters include higher layer parameters and/or predefined parameters.

In other words, the CSI-related parameter may be a parameter configured by the network device, or a fixed parameter.

It should be appreciated that the CSI-related parameters may include any parameters for determining CSI, which may be included in connection with the following embodiments.

In some embodiments of the present application, the densities of the Ks CSI-RS resources are the same.

The density of the CSI-RS resources is the CSI-RS frequency density of each CSI-RS port of each physical resource block (PhysicalResource Block, PRB).

The cost of the CSI-RS resource is positively correlated with the port number and the density of the CSI-RS resource, namely, the more the port number is, the greater the cost is, the greater the density is, and the cost is greater, so that the cost of the CSI-RS can be reduced by designing the port number of the CSI-RS resource to reduce the density of the CSI-RS.

In some embodiments, the Ks CSI-RS resources have a density of 0.25, which is beneficial for reducing CSI-RS resource overhead.

In some embodiments, the density of the Ks CSI-RS resources is 0.25 for only the total number of ports of the Ks CSI-RS resources is X, e.g., X is one of {32}, {32,24}, {32,24,16 }. In other words, the density of Ks CSI-RS resources is 0.25 only when the total port number of the Ks CSI-RS resources is X.

In some embodiments of the present application, the number of the Ks CSI-RS resources is determined according to the density of the Ks CSI-RS resources. For example, the Ks CSI-RS resources are 1/D CSI-RS resources, wherein the D is the density of the Ks CSI-RS resources.

In some embodiments, the D is a higher layer parameter, or the D is a predefined parameter.

In other words, the D may be configured by the network device or a fixed parameter, e.g., D is 0.25,0.5, etc.

In some embodiments, the CSI-RS related parameter may include the parameter D.

In some embodiments of the application, the resource block offsets (rb-offsets) of the Ks CSI-RS resources are different. I.e., the Ks CSI-RS resources may be distinguished by means of frequency division multiplexing.

As an example, the density of the Ks CSI-RS resources is 0.5, the resource block offset of the first CSI-RS resource of the Ks CSI-RS resources is zero (i.e., the first CSI-RS resource corresponds to the even resource block RB), and the resource block offset of the second CSI-RS resource is 1 (i.e., the second CSI-RS resource corresponds to the odd resource block RB).

As another example, the density of the Ks CSI-RS resources is 0.25, the resource block offset of the first CSI-RS resource of the Ks CSI-RS resources is zero, the resource block offset of the second CSI-RS resource is 1, the resource block offset of the third CSI-RS resource is 2, and the resource block offset of the fourth CSI-RS resource is 3.

In some embodiments of the present application, the number of CSI-RS ports of all CSI-RS resources in the CSI-RS resource set is the same. For example, ks is 4, the total port number of the 4 CSI-RS resources is 32, and the port number of each CSI-RS resource can be 8.

In other embodiments of the present application, the number of CSI-RS ports of all CSI-RS resources in the CSI-RS resource set is different. It should be understood that, the different numbers of CSI-RS ports herein do not mean that the numbers of CSI-RS ports of every two CSI-RS resources are different, but that CSI-RS resources with different numbers of CSI-RS ports may exist in the CSI-RS resource set.

For example, ks is 4, the total port number of the 4 CSI-RS resources is 32, and the port number of each CSI-RS resource can be 16,8,4,4 in sequence, in which case the 4 CSI-RS resources can include 4 CSI-RS resources with a density of 0.25.

For another example, ks is 2, the total port number of the 2 CSI-RS resources is 48, and the port number of each CSI-RS resource can be 32, 16, in which case the 2 CSI-RS resources can include 2 CSI-RS resources with a density of 0.5.

In some embodiments of the present application, the number of CSI-RS ports included in the CSI-RS resources in the CSI-RS resource set is a first value, where the first value is 16 and/or 8. Alternatively, the first value may be determined from a higher layer parameter or a predefined parameter.

As an example, the first value is a fixed value of 16 or 8, or the first value is one of 16 and 8.

In some embodiments, the Ks CSI-RS resources include 2 CSI-RS resources with a density of 0.5, and a total port number for the Ks CSI-RS resources is a second value of at least one of 32, 24, and 16.

Alternatively, the second value may be determined from a higher layer parameter or a predefined parameter.

As an example, the second value is a fixed value of 32 or 16 or 24, or one of 32, 24 and 16.

In other embodiments of the present application, the CSI-RS resource includes a CSI-RS port number of 8.

As an example, the Ks CSI-RS resources include 4 CSI-RS resources with a density of 0.25 for the Ks CSI-RS resources only, a total port number of 32,3 CSI-RS resources with a density of 0.333 for the Ks CSI-RS resources only, and a total port number of 24,2 CSI-RS resources with a density of 0.5 for the Ks CSI-RS resources only, a total port number of 16.

In still further embodiments of the present application, the number of CSI-RS ports of all CSI-RS resources in the CSI-RS resource set does not exceed a first threshold.

Alternatively, the first threshold may be configured by the network device, or predefined.

In other words, the first threshold may be a higher-level parameter or a predefined parameter (or, in other words, a fixed parameter).

As an example, the first threshold may be 32 or 48.

In some embodiments of the present application, the number Ks of CSI-RS resources included in the CSI-RS resource set is determined by a capability of the terminal device.

In some embodiments of the present application, the density of the Ks CSI-RS resources is 0.25 determined by the capability of the terminal device.

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

the terminal equipment determines a target CSI-RS resource in the Ks CSI-RS resources, wherein the target CSI-RS resource is used for reporting the CSI.

In the embodiment of the application, the CSI-RS resource set is configured, the port number of each CSI-RS resource and the density of the CSI-RS resource meet the relation, and the target CSI-RS resource for reporting the CSI is further determined in the CSI-RS resource set, so that the expenditure of the CSI-RS resource can be reduced.

Alternatively, the target CSI-RS resource may include one CSI-RS resource, or a plurality of CSI-RS resources.

and the terminal equipment sends first indication information to the network equipment, wherein the first indication information is used for indicating the target CSI-RS resource.

In some embodiments, the number of CSI-RS resources included in the target CSI-RS resource is one, and the first indication information includes a CSI-RS resource indication (CSI-RS Resource Indicator, CRI) for indicating the one target CSI-RS resource.

In other embodiments, the target CSI-RS resource includes a plurality of CSI-RS resources, and the first indication information indicates the plurality of CSI-RS resources through a bit map or a combination manner.

As an example, when the bit map mode indication is adopted, the first indication information includes Ks bits. For example, each bit in the Ks bits corresponds to one CSI-RS resource in the Ks CSI-RS resources, and the value of each bit is used to indicate whether the corresponding CSI-RS resource is used to report CSI.

As an example, when the combination manner indication is adopted, the first indication information includesA number of bits, wherein the K is the number of the plurality of CSI-RS resources,representing an upward rounding.

In some embodiments, the K is a higher layer parameter or a predefined parameter.

In some embodiments, the CSI-related parameter may include the K.

In other embodiments, the K is determined from the Ks.

As an example, the K is determined from the Ks and a first coefficient x, which is a higher layer parameter or a predefined parameter. For example, k=x×ks, x+.1.

In some embodiments, the CSI-related parameter may include the first coefficient x.

and under the condition that the target CSI-RS resources comprise the Ks CSI-RS resources, the terminal equipment does not send CRI to the network equipment.

The target CSI-RS resources including the Ks CSI-RS resources may be understood that the terminal device does not select the CSI-RS resources, but reports CSI through all CSI-RS resources.

and for each CSI-RS resource in the target CSI-RS resources, sequentially mapping the port sequence number of the PMI from the first CSI-RS port of each CSI-RS resource to the last CSI-RS port of each CSI-RS resource.

As an example, the target CSI-RS resources include CSI-RS resources 0 to 3, where CSI-RS resource 0 includes CSI-RS ports 0 to 7, CSI-RS resource 1 includes CSI-RS ports 8 to 15, CSI-RS resource 2 includes CSI-RS ports 16 to 23, and CSI-RS resource 3 includes CSI-RS ports 24 to 31. Table 1 shows one mapping scheme of PMI port numbers.

TABLE 1

Resource block offset	0	1	2	3
CSI-RS resources	0	1	2	3
Port number	0～7	8～15	16～23	24～31

In other embodiments of the present application, the Ks CSI-RS resources are 1 CSI-RS resource, and the one CSI-RS resource includes a plurality of CSI-RS port groups.

By dividing one CSI-RS resource into a plurality of CSI-RS port groups, the density and the port number of each CSI-RS port group are further configured, and the cost of the CSI-RS resource is reduced.

In some embodiments of the application, the plurality of CSI-RS port groups have the same density. For example, the density of the plurality of CSI-RS port groups is 0.25.

In some embodiments, the plurality of CSI-RS port groups has a density of 0.25 and a total port number for only the one CSI-RS resource of 32, 24, or 16.

In some embodiments of the present application, the number of CSI-RS port groups included in the one CSI-RS resource is configured by the network device or predefined.

In other embodiments of the present application, the number of CSI-RS port groups included in the one CSI-RS resource is determined according to the densities of the plurality of CSI-RS port groups. For example, the one CSI-RS resource includes 1/P CSI-RS port groups, where P is a density of the plurality of CSI-RS port groups.

In some embodiments, the P is a higher layer parameter or the P is a predefined parameter.

In other words, the P may be configured by the network device or a fixed parameter, e.g., P is 0.25,0.5, etc.

In some embodiments, the CSI-RS related parameter may include the parameter P.

In some embodiments of the application, the resource block offsets (rb-offsets) of the plurality of CSI-RS port groups are different.

As an example, the density of the plurality of CSI-RS port groups is 0.5, the resource block offset of the first CSI-RS port group of the plurality of CSI-RS port groups is zero (i.e., the first CSI-RS port group corresponds to the even resource block RB), and the resource block offset of the second CSI-RS port group is 1 (i.e., the second CSI-RS port group corresponds to the odd resource block RB).

As yet another example, the plurality of CSI-RS port groups has a density of 0.25, a resource block offset of a first CSI-RS port group of the plurality of CSI-RS port groups is zero, a resource block offset of a second CSI-RS port group is 1, a resource block offset of a third CSI-RS port group is 2, and a resource block offset of a fourth CSI-RS port group is 3.

In some embodiments of the present application, each CSI-RS port group of the plurality of CSI-RS port groups includes the same number of CSI-RS ports. For example, the total port number of the CSI-RS resource is 32, and the plurality of CSI-RS port groups is 4 CSI-RS port groups, and then the CSI-RS port number included in each CSI-RS port group is 8.

In other embodiments of the present application, each CSI-RS port group of the plurality of CSI-RS port groups includes a different number of CSI-RS ports. It should be understood that, herein, the different numbers of CSI-RS ports included in each CSI-RS port group does not mean that the numbers of CSI-RS ports included in each of the two CSI-RS port groups are different, but that, in the multiple CSI-RS port groups, there may be CSI-RS port groups having different numbers of CSI-RS ports.

For example, the total port number of the one CSI-RS resource is 32, and the plurality of CSI-RS port groups is 4 CSI-RS port groups, and then the CSI-RS port number included in each CSI-RS port group may be 16,8,4,4 in sequence, in which case the 4 CSI-RS port groups may include 4 CSI-RS port groups with a density of 0.25.

For another example, the total port number of the one CSI-RS resource is 48, and the plurality of CSI-RS port groups is 2 CSI-RS port groups, and then the CSI-RS port number included in each CSI-RS port group may be 32, 16, in which case the 2 CSI-RS port groups may include 2 CSI-RS port groups with a density of 0.5.

In some embodiments of the present application, the CSI-RS resource includes a first number of CSI-RS ports, and the first number is 16 and/or 8. Alternatively, the first value may be determined from higher layer parameters and/or predefined parameters.

In some embodiments, the one CSI-RS resource includes 2 CSI-RS port groups with a density of 0.5, and the total port number for the one CSI-RS resource is a second value, the second value being 32 and/or 16.

As an example, the second value is a fixed value of 32 or 16, or the second value is one of 32 and 16.

As an example, the one CSI-RS resource includes 4 CSI-RS ports with a density of 0.25, and the total port number for the one CSI-RS resource is 32.

In still other embodiments of the present application, the total CSI-RS port number of the one CSI-RS resource does not exceed the second threshold.

Alternatively, the second threshold may be configured by the network device, or predefined.

In other words, the second threshold may be a higher layer parameter or a predefined parameter.

As an example, the second threshold may be 32 or 48.

In some embodiments of the present application, the number of CSI-RS port groups included in the one CSI-RS resource is determined by a capability of the terminal device.

In some embodiments of the present application, the density of the plurality of CSI-RS port groups is 0.25 determined by the capability of the terminal device.

In some embodiments of the present application, the CSI-RS resource includes a CSI-RS port group that is one or more code division multiplexing (Code Division Multiplexing, CDM) groups.

In some embodiments, if the total port number of the plurality of CSI-RS port groups is 32, the one CSI-RS resource includes 4 CDM groups.

For example, as shown in table 2, for row 18 in the table, when the total port number of the plurality of CSI-RS port groups is 32, the one CSI-RS resource includes 4 CDM groups.

TABLE 2

In some embodiments, if the density of the plurality of CSI-RS port groups is 0.25, each of the 4 CDM groups corresponds to one resource block offset.

In other embodiments, if the density of the plurality of CSI-RS port groups is 0.5, two CDM groups of the 4 CDM groups correspond to one resource block offset.

Table 3 shows the correspondence between the density of CSI-RS port groups and the resource block offset.

TABLE 3 Table 3

For example, when the density of the plurality of CSI-RS port groups is 0.5 and one CSI-RS resource includes 4 CDM groups (CDM groups 0 to 3), two CDM groups among the 4 CDM groups correspond to one resource block offset, CDM group 0 and CDM group 1 correspond to Rb-offset0, and CDM group 2 and CDM group 3 correspond to Rb-offset1.

For another example, when the density of the plurality of CSI-RS port groups is 0.25 and one CSI-RS resource includes 4 CDM groups (CDM groups 0 to 3), each of the 4 CDM groups corresponds to one resource block offset, CDM group 0 corresponds to Rb-offset0, CDM group 1 corresponds to Rb-offset1, CDM group 2 corresponds to Rb-offset2, and CDM group 3 corresponds to Rb-offset3.

Therefore, by designing the number of the CSI-RS resources, the port number of the CSI-RS resources, the density of the CSI-RS resources or the number of port groups included in the CSI-RS resources, the port number included in the port groups of the CSI-RS resources can reduce the expenditure of the CSI-RS resources in a frequency division multiplexing mode.

the terminal device determines at least one of the following information according to the higher layer parameters and/or the predefined parameters:

the number M of frequency domain basis vectors (FD basic) reported by the terminal equipment, wherein M is an integer greater than 1;

the number of PMI subbands R per channel quality indication (Channel Quantity Indicator, CQI) subband;

the terminal equipment measures a window position S and a length N of the CSI-RS and/or the reported frequency domain base vector;

the terminal device reports the position f of the strongest coefficient (Strongest coefficient indicator, SCI) ₀ ；

And the maximum nonzero coefficient number reported by the terminal equipment.

In some embodiments, the M is a prime number, e.g., M is 3.

In some embodiments, the number of PMI subbands R of the CQI subband is one value from the following set: {1,2,4},{1,2,4,8}.

As an example, the R is one of {1,2,4} or {1,2,4,8} if and only if M > 1.

In some embodiments, the window positions and lengths of the CSI-RS measured by the terminal device and the frequency domain base vector reported by the terminal device may be the same or different.

In other words, the measuring, by the terminal device, the window position and length of the CSI-RS and/or the frequency domain base vector reported by the terminal device may include:

the terminal device measures the window position S1 and the length N1 of the CSI-RS, and/or,

and the terminal equipment reports the window position S2 and the length N2 of the frequency domain base vector.

Wherein S1 and S2 may be the same or different, and N1 and N2 may be the same or different.

The implementation of window position S and length N illustrated below may be applied to S1 and N1, and S2 and N2 described above.

In some embodiments, the S is zero.

In other embodiments, the window position S may be determined according to the number of PMI subbands.

For example s=i×n ₃ A, wherein i=one of 0,1, …, a-1, wherein a is a higher layer parameter or a predefined parameter, N ₃ The number of PMI subbands.

As an example, the a may be one of {2,4 }.

In some embodiments, the CSI-related parameter may include the parameter a.

In some embodiments, the N is a prime number, such as 1,3,5,7, etc.

In some embodiments, multiple terminal devices may multiplex CSI-RS resources in a time-division manner, for example, the position where different terminal devices report the strongest coefficient may be time-division, or the window position S where the terminal devices report the frequency domain base vector may be time-division, which is beneficial to reduce CSI-RS resource overhead.

In some embodiments, the window starting position S may be network device configured, or predefined.

For example, the network device may configure the window start position S through higher layer signaling, such as radio resource control signaling (Radio Resource Control, RRC) or physical layer signaling, e.g., downlink control information (Downlink Control Information, DCI).

In some embodiments, the f ₀ Zero.

In other embodiments, the reporting the position f of the strongest coefficient ₀ May be determined based on higher layer parameters. For example, the higher layer parameter may include the number of PMI subbands.

For example f ₀ ＝i×N ₃ B, wherein i=one of 0,1, …, b-1, wherein b is a higher layer parameter or a predefined parameter, N ₃ The number of PMI subbands.

As an example, the b may be one of {2,4 }.

In some embodiments, the CSI-related parameter may include the parameter b.

In some embodiments, the terminal calculates the sequence numbers of M FD basic groupsSecondary is f ⁰ ，f ¹ ，…，f ^M-1 In a specific implementation, the strongest coefficient f can be caused by a cyclic shift ^SCI ＝f ₀ 。

In some embodiments, the terminal device reports the start position M of the window of the frequency domain base vector _initial ＝mod(f ₀ -Δ,N ₃ ) Where Δ is a higher layer parameter or a predefined parameter. As an example, Δ may be N/2.

The window for reporting the frequency domain base vector by the terminal equipment comprises a frequency domain base vector f epsilon mod (M _initial +i，N ₃ ) I=0, 1, …, N-1, where mod () represents a modulo operation.

In some embodiments, if m=1, the rank is equal to 1, the maximum non-zero coefficient number is K0, the rank (rank) is greater than 1, and the total maximum non-zero coefficient number of all layers is

In other embodiments, if M>1, rank is equal to 1, and the maximum non-zero coefficient number isRank is greater than 1, and the total maximum non-zero coefficient number of all layers is

Alternatively, the alpha is not less than 1.

Alternatively, the α may be a higher layer parameter or a predefined parameter. In other words, α may be network device configured, or predefined.

Optionally, K0 is based on the total number of CSI ports P for reporting CSI _CSI-RS It is determined, for example,for limiting CSI reporting overhead.

For example, P _CSI-RS The total number of CSI-RS ports included in the target CSI-RS resource may be the total number of CSI-RS ports included in the target CSI-RS resource, or if the terminal device sends CSI through all CSI-RS resources in the CSI-RS resource set, the P _CSI-RS The number of CSI-RS ports included for all CSI-RS resources may be.

Alternatively, β is greater than or equal to 1.

Alternatively, the β may be a higher layer parameter or a predefined parameter. In other words, β may be network device configured, or predefined.

Alternatively, γ is greater than or equal to 1.

Alternatively, the γ may be a higher layer parameter or a predefined parameter. In other words, γ may be network device configured, or predefined.

Optionally, the CSI-related parameter may include one or more of the α, β, γ.

In some embodiments of the present application, the S203 may include:

and the terminal equipment reports the PMI to the network equipment.

In some embodiments, the terminal device reporting the PMI to the network device includes at least one of:

The terminal equipment reports the M frequency domain base vectors;

the terminal equipment reports the initial positions of windows corresponding to the M frequency domain basis vectors;

the terminal equipment reports the strongest coefficient SCI;

the terminal equipment reports a non-zero coefficient;

the terminal equipment reports CQI;

the terminal equipment reports first indication information, wherein the first indication information is used for determining the strongest coefficient.

In some embodiments, the first indication information includes port location indication information and/or frequency domain location indication information.

In some embodiments, the port location indication information is used to indicate a location of a CSI-RS port of a CSI-RS resource used to report CSI.

In some embodiments, the frequency domain location indication information is used to indicate frequency domain location information of the strongest coefficient.

As an example, the frequency domain position indication information is used to indicate the offset of the frequency domain position of the strongest coefficient relative to the window starting position S, denoted as f _Δ 。

As another example, the frequency domain position indication information is used to indicate the absolute frequency domain position of the strongest coefficient according to the window start position S and the offset f relative to the window start position S _Δ And (5) determining.

For example, the absolute frequency domain position of the strongest coefficient is determined by mod (S+f _Δ N3), where N3 represents the number of PMI subbands.

Alternatively, the window starting position S may be network device configured, or predefined, e.g. the network device configures the S by RRC signaling or DCI.

In some embodiments, the terminal device may perform a cyclic shift operation on each layer such that the frequency domain position of the strongest coefficient of each layer is offset by an amount f from the window start position S _Δ The same applies. I.e. all layers can use a common f _Δ Therefore, when the frequency domain position indication information is reported, only one frequency domain position indication information can be reported, and the CSI overhead is reduced.

In some embodiments, the frequency domain position of the strongest coefficient is offset f from the window start position S _Δ May be determined based on the window length N. For example, f can be determined from N and the coefficient k _Δ For example, k may be 1/2,1/3, etc. As an example, f _Δ ＝N/2。

Alternatively, the window length N may be network device configured or predefined, e.g. the network device configures the N through RRC signaling or DCI.

The window starting position S and the length N are used for determining a window for reporting the frequency domain base vector.

In some embodiments, k may be network device configured, or predefined, e.g., by higher layer signaling or DCI configuration.

In some embodiments, the frequency domain position of the strongest coefficient is offset f from the window start position S _Δ May be network device configured, or predefined, e.g., the network device configures the f through higher layer signaling or DCI _Δ 。

In some embodiments, the bit width of the port location indication information may be based on K ₁ Bit or 2L bit determination, e.g. K ₁ Bits or 2L bits, orBits orBits. Wherein K is ₁ 2L represents the CSI-RS port number of the CSI-RS resource selected by the terminal equipment for reporting the CSI.

In some embodiments, the bit width of the frequency domain location indication information may be determined according to a window length N, for example, N bits orBits.

In some implementations, for a layer number v greater than 1, for each layer, the terminal device reports port location indication information corresponding to each layer, i.e. the port location indication information is layer granularity, where the total bit width occupied by the port location information reported by the terminal device may be v K ₁ Bits or 2L bits, or vBits orBits.

In some implementations, for layers v greater than 1, for each layer, the terminal device reports one frequency domain location indication information, i.e. all layers may employ common frequency domain location indication information. In this case, the total bit width occupied by the frequency domain location information reported by the terminal device may be N bits or Bits.

In some embodiments, the M frequency-domain basis vectors are selected from N frequency-domain basis vectors f εmod (S+i, N) ₃ )，i＝0,1,…,N-1。

Optionally, the terminal device is configured toThe bits report the frequency domain base vectors for each or all layers.

In some embodiments, the terminal device is configured toThe starting position of the window of the bit reporting frequency domain base vector corresponds to M as described above _initial . As an example, each layer is respectivelyAnd reporting the bits, or, the frequency domain base vectors corresponding to each layer are the same.

In some embodiments, the terminal device is configured toOr (b)Reporting the strongest coefficient by bit, wherein K ₁ 2L represents the CSI-RS port number of the CSI-RS resource selected by the terminal equipment for reporting the CSI.

In other embodiments, if the rank is equal to 1 (or the number of layers is equal to 1), the terminal device performs the following stepsReporting the strongest coefficient by bit, wherein K _NZ Representing the total non-zero coefficient number of all layers; or alternatively

If the rank is greater than 1 (or the layer number is greater than 1), the terminal equipment passes throughThe strongest coefficients of each layer are reported by the bits, where α is a higher layer parameter or a predefined parameter, and the determination of K0 is referred to in the foregoing embodiments.

In still other embodiments, if the rank is equal to 1, the terminal device passes throughReporting the strongest coefficient by bit, wherein K _NZ Representing the total non-zero coefficient number of all layers; or alternatively

If the rank is greater than 1, the terminal equipment passes throughThe bits report the strongest coefficients for each layer.

In yet another embodimentIn some embodiments, if the rank is equal to 1 (or the number of layers is equal to 1), the terminal device passesReporting the strongest coefficient by bits; or alternatively

If the rank is greater than 1 (or the number of layers is greater than 1), the terminal device reports the layer where the strongest coefficient is located, and passes throughOr (b)The position of the strongest coefficient in the layer is reported by the bit, wherein α is a high layer parameter or a predefined parameter, and the determination of K0 refers to the foregoing embodiment.

In some embodiments, if M is greater than 1, for each CSI-RS port used by the terminal device to report CSI, for example, a CSI-RS port included in the target CSI-RS resource, the terminal device reports only one non-zero coefficient.

In some embodiments, the terminal device reporting CQI to the network device includes:

the terminal equipment only reports the broadband CQI, or sets a CQI format indicator (CQI-format indicator) to be CQI (widebandCQI) in width; or alternatively

If M is greater than 1, the terminal device reports the sub-band CQI, or sets a CQI format indicator (CQI-format indicator) to be the sub-band CQI (subbandCQI).

and the terminal equipment calculates CQI according to at least one CSI-RS resource for reporting the CSI.

Namely, the terminal equipment calculates CQI according to the target CSI-RS resource, wherein the target CSI-RS resource can comprise part or all of the CSI-RS resources in the CSI-RS resource set.

the terminal device determines the CQI subband size according to higher layer parameters or predefined parameters.

The CQI subband size may refer to the number of physical resource blocks (physical resource block, PRBs) that each CQI subband comprises.

As an example, the CQI subband sizeAccording to the reporting bandwidthAnd a first parameter d1, which is a higher layer parameter or a predefined parameter.

For example, the number of the cells to be processed,for example d1=1, 2,4.

As yet another example, the CQI subband sizeAccording to nominal subband sizeAnd a second parameter d2, said second parameter d2 being a higher layer parameter or a predefined parameter.

Optionally, the nominal subband size Is determined according to a bandwidth Part (BWP) size and a higher layer parameter subband size (subband).

Optionally, the second parameter

In summary, the CQI subband size may be determined according to a specific bandwidth, which may be the reporting bandwidth or the nominal subband size described above, or may be another reference bandwidth, and a scaling factor, which may be a higher layer parameter, or a predefined parameter. For example, the scaling factor may be 1,1/2, or 1/4, etc.

Therefore, in the embodiment of the application, the network device can configure the CSI-RS resource set for the terminal device, wherein the CSI-RS resource set comprises at least one CSI-RS resource, the terminal device determines CSI based on the CSI-RS resource set and/or CSI related parameters configured by the network device, and further reports CSI to the network device through the CSI-RS resource in the CSI-RS resource set, so that the expenditure of the CSI-RS resource can be reduced.

Therefore, the embodiment of the application can compress codebook overhead, improve feedback efficiency and improve system robustness by estimating the characteristics of a space domain and a time delay (DFT conversion domain) from SRS. When the number of antennas is large or the number of users is large, the CSI-RS occupies a large amount of downlink resource overhead, different frequency domains bear a plurality of beams, and the overhead of the required CSI-RS can be reduced by adopting the design.

For example, by designing the number of CSI-RS resources, the number of ports of CSI-RS resources, the density of CSI-RS resources, or the number of port groups included in CSI-RS resources, the number of ports included in port groups of CSI-RS resources can reduce CSI-RS overhead by frequency division multiplexing.

For another example, different window positions are corresponding to different terminal devices, or the (time delay) can enable the plurality of terminal devices to achieve the effect of reducing the expenditure of the CSI-RS resources by multiplexing the same physical resources through time division.

And, after the base station is formed from the space/frequency domain, the channel is flattened, and the channel information can be well reflected through simple parameter configuration (for example, one or two FD/large sub-band bandwidths), and meanwhile, the complexity of UE realization is reduced.

The method embodiment of the present application is described in detail above with reference to fig. 2, and the apparatus embodiment of the present application is described in detail below with reference to fig. 3 to 7, it being understood that the apparatus embodiment corresponds to the method embodiment, and similar descriptions can refer to the method embodiment.

Fig. 3 shows a schematic block diagram of a terminal device 400 according to an embodiment of the application. As shown in fig. 3, the terminal device 300 includes:

a communication unit 310, configured to receive a CSI-RS resource set sent by a network device, where the CSI-RS resource set includes Ks CSI-RS resources, and each CSI-RS resource includes at least one CSI-RS port, where Ks is an integer greater than or equal to 1;

A processing unit 320, configured to determine channel state information CSI according to the CSI-RS resource set and/or CSI related parameters, where the CSI includes a precoding matrix indicator PMI;

the communication unit 310 is further configured to report the CSI to the network device.

In some embodiments, the densities of the Ks CSI-RS resources are the same, the densities of the Ks CSI-RS resources being 0.25.

In some embodiments, the Ks CSI-RS resources have a density of 0.25 and a total port number for only the Ks CSI-RS resources of 32.

In some embodiments, the Ks CSI-RS resources are 1/D CSI-RS resources, wherein the D is a density of the Ks CSI-RS resources.

In some embodiments, the resource block offsets of the Ks CSI-RS resources are different.

In some embodiments, the density of the Ks CSI-RS resources is 0.5, the resource block offset of a first CSI-RS resource of the Ks CSI-RS resources is zero, and the resource block offset of a second CSI-RS resource is 1; or alternatively

The density of the Ks CSI-RS resources is 0.25, the resource block offset of the first CSI-RS resource of the Ks CSI-RS resources is zero, the resource block offset of the second CSI-RS resource is 1, the resource block offset of the third CSI-RS resource is 2, and the resource block offset of the fourth CSI-RS resource is 3.

In some embodiments, the CSI-RS resources each include a first number of CSI-RS ports of 16 and/or 8, the Ks CSI-RS resources include 2 CSI-RS resources with a density of 0.5 and a total number of ports for the Ks CSI-RS resources is a second number of ports of 32 and/or 16.

In some embodiments, each CSI-RS resource includes a CSI-RS port number of 8, and the Ks CSI-RS resources include 4 CSI-RS resources with a density of 0.25 for a total port number of 32 for the Ks CSI-RS resources only.

In some embodiments, the number of CSI-RS ports of all CSI-RS resources in the CSI-RS resource set does not exceed a first threshold.

In some embodiments, the CSI-RS ports of all CSI-RS resources in the CSI-RS resource set are the same.

In some embodiments, the number of CSI-RS ports of all CSI-RS resources in the CSI-RS resource set is different.

In some embodiments, the number of CSI-RS resources Ks comprised by the set of CSI-RS resources is determined by the capability of the terminal device, and/or

The density of the Ks CSI-RS resources is 0.25, which is determined by the capability of the terminal equipment.

In some embodiments, the processing unit 320 is further configured to:

and determining a target CSI-RS resource in the Ks CSI-RS resources, wherein the target CSI-RS resource is used for reporting the CSI.

In some embodiments, the communication unit 310 is further configured to:

and sending first indication information to the network equipment, wherein the first indication information is used for indicating the target CSI-RS resource.

In some embodiments, the number of CSI-RS resources included in the target CSI-RS resource is one, and the first indication information includes a CSI-RS resource indication CRI, where CRI is used to indicate the one target CSI-RS resource; or alternatively

The target CSI-RS resource comprises a plurality of CSI-RS resources, and the first indication information indicates the plurality of CSI-RS resources in a bit map or combined mode.

In some embodiments, the first indication information includes Ks bits, or,a number of bits, wherein the K is the number of the plurality of CSI-RS resources, Representing an upward rounding.

In some embodiments, the K is a higher layer parameter or a predefined parameter, or the K is determined from the Ks.

In some embodiments, the K is determined from the Ks and a first coefficient, the first coefficient being a higher layer parameter or a predefined parameter.

In some embodiments, the communication unit 310 is further configured to:

and if the target CSI-RS resource comprises the Ks CSI-RS resources, not transmitting CRI to the network equipment.

In some embodiments, the target CSI-RS resource comprises a plurality of CSI-RS resources, the method further comprising:

and for each CSI-RS resource in the plurality of CSI-RS resources, sequentially mapping the port sequence number of the PMI from the first CSI-RS port of each CSI-RS resource to the last CSI-RS port of each CSI-RS resource.

In some embodiments, the Ks CSI-RS resources are 1 CSI-RS resource, the one CSI-RS resource comprising a plurality of CSI-RS port groups.

In some embodiments, the plurality of CSI-RS port groups are the same in density and the plurality of CSI-RS port groups are 0.25 in density.

In some embodiments, the plurality of CSI-RS port groups has a density of 0.25 and a total port number for only the one CSI-RS resource of 32.

In some embodiments, the one CSI-RS resource comprises 1/P CSI-RS port groups, wherein the P is a density of the plurality of CSI-RS port groups.

In some embodiments, the resource block offsets of the plurality of CSI-RS port groups are different.

In some embodiments, the density of the plurality of CSI-RS port groups is 0.5, the resource block offset of a first CSI-RS port group of the plurality of CSI-RS port groups is zero, and the resource block offset of a second CSI-RS port group is 1; or alternatively

The density of the plurality of CSI-RS port groups is 0.25, the resource block offset of the first CSI-RS port group of the plurality of CSI-RS port groups is zero, the resource block offset of the second CSI-RS port group is 1, the resource block offset of the third CSI-RS port group is 2, and the resource block offset of the fourth CSI-RS port group is 3.

In some embodiments, the one CSI-RS resource includes a first number of CSI-RS ports of 16 and/or 8, and the one CSI-RS resource includes 2 CSI-RS port groups of density 0.5 for the one CSI-RS resource only with a total number of ports of a second value of 32 and/or 16.

In some embodiments, the one CSI-RS resource includes a CSI-RS port number of 8, and the one CSI-RS resource includes 4 CSI-RS ports having a density of 0.25 for only the one CSI-RS resource has a total port number of 32.

In some embodiments, the total CSI-RS port number of the one CSI-RS resource does not exceed the second threshold.

In some embodiments, each of the plurality of CSI-RS port groups includes the same number of CSI-RS ports.

In some embodiments, each of the plurality of CSI-RS port groups includes a different number of CSI-RS ports.

In some embodiments, the number of CSI-RS port groups comprised by the one CSI-RS resource is determined by the capability of the terminal device, and/or

The density of the plurality of CSI-RS port groups is 0.25 determined by the capabilities of the terminal device. 36. The method of any of claims 23-35, wherein the CSI-RS port group is one or more code division multiplexing, CDM, groups.

In some embodiments, if the density of the plurality of CSI-RS port groups is 0.25, each of the 4 CDM groups corresponds to one resource block offset; or alternatively

If the density of the plurality of CSI-RS port groups is 0.5, two CDM groups of the 4 CDM groups correspond to one resource block offset.

In some embodiments, the processing unit 320 is further configured to:

determining at least one of the following information from the higher layer parameters and/or predefined parameters:

the number M of the frequency domain base vectors reported by the terminal equipment, wherein M is an integer greater than 1;

the number of PMI subbands R per channel quality indicator CQI subband;

the terminal equipment reports the position f of the strongest coefficient ₀ ；

And the maximum nonzero coefficient number reported by the terminal equipment.

In some embodiments, the M is a prime number.

In some embodiments, R is one of the following sets: {1,2,4},{1,2,4,8}.

In some embodiments, the R is one of {1,2,4,8} if and only if M > 1.

In some embodiments, the S is zero; or alternatively

The s=i×n ₃ A, wherein i=one of 0,1, …, a-1, wherein a is a higher layer parameter or a predefined parameter, N ₃ The number of PMI subbands.

In some embodiments, the N is a prime number.

In some embodiments, the f ₀ Zero; or alternatively

Said f ₀ ＝i×N ₃ B, wherein i=one of 0,1, …, b-1, wherein b is a higher layer parameter or a predefined parameter, N ₃ The number of PMI subbands.

In some embodiments, the terminal device reports the start position M of the window of the frequency domain base vector _initial ＝mod(f ₀ -Δ,N ₃ ) Wherein Δ is a high-level parameter or a predefined parameter;

In some embodiments, if m=1, the rank is equal to 1, the maximum non-zero coefficient number is K0, the rank is greater than 1, and the total maximum non-zero coefficient number of all layers is

If M>1, rank is equal to 1, and the maximum non-zero coefficient number isRank is greater than 1, and the total maximum non-zero coefficient number of all layers is

Wherein, P _CSI-RS the total number of CSI-RS ports for reporting the CSI is equal to or greater than 1, equal to or greater than 1 and greater than 1.

In some embodiments, the α is a high-level parameter or predefined parameter, the β is a high-level parameter or predefined parameter, and the γ is a high-level parameter or predefined parameter.

In some embodiments, the communication unit 310 is further configured to:

and reporting the PMI to the network equipment.

In some embodiments, the communication unit 310 is further configured to perform at least one of the following:

reporting the M frequency domain base vectors;

reporting the initial positions of windows corresponding to the M frequency domain basis vectors;

reporting the strongest coefficient;

reporting a non-zero coefficient;

and reporting the CQI.

In some embodiments, the terminal device is configured toThe bits report the frequency domain base vectors for each or all layers.

In some embodiments, the terminal device is configured toReporting the initial position of the window of the frequency domain base vector by bits, wherein each layer respectively usesAnd reporting the bits, or the frequency domain base vectors corresponding to each layer are the same.

In some embodiments, if the rank is equal to 1, the terminal device passes throughReporting the strongest coefficient by bit, wherein K _NZ Representing the total non-zero coefficient number of all layers; or alternatively

If the rank is greater than 1, the terminal equipment passes through The strongest coefficient of each layer is reported by the bit, wherein alpha is a higher layer parameter or a predefined parameter,P _CSI-RS is the total number of CSI-RS ports for reporting CSI.

In some embodiments, if the rank is equal to 1, the terminalDevice pass throughReporting the strongest coefficient by bit, wherein K _NZ Representing the total non-zero coefficient number of all layers; or alternatively

If the rank is greater than 1, the terminal equipment passes throughThe bits report the strongest coefficients for each layer, wherein,

in some embodiments, if the rank is equal to 1, the terminal device passes throughReporting the strongest coefficient by bits; or alternatively

If the rank is greater than 1, the terminal device reports the layer where the strongest coefficient is located, and passes throughOr (b)Reporting the position of the strongest coefficient in the layer, wherein alpha is a high-layer parameter or a predefined parameter,

in some embodiments, if M is greater than 1, for each CSI-RS port used by the terminal device to report CSI, the terminal device reports only one non-zero coefficient.

In some embodiments, the communication unit 310 is further configured to:

only reporting the broadband CQI; or if M is greater than 1, reporting the sub-band CQI.

In some embodiments, the processing unit 320 is further configured to:

and determining CQI according to at least one CSI-RS resource for reporting the CSI.

In some embodiments, the processing unit 320 is further configured to:

the CQI subband size is determined according to higher layer parameters or predefined parameters.

In some embodiments, the CQI subband size is determined from the reporting bandwidth and a first parameter, which is a higher layer parameter or a predefined parameter.

In some embodiments, the CQI subband size is determined from a nominal subband size and a second parameter, the second parameter being a higher layer parameter or a predefined parameter, wherein the nominal subband size is determined from a bandwidth portion BWP size and a higher layer parameter subband size.

In some embodiments, the frequency domain position indication information is used to indicate an offset f of the frequency domain position of the strongest coefficient with respect to the window position S _Δ Or (b)

The frequency domain position indication information is used for indicating the absolute frequency domain position of the strongest coefficient.

In some embodiments, the absolute frequency domain position of the strongest coefficient is determined by mod (S+f _Δ N3), wherein N3 represents the number of PMI subbands, f _Δ Frequency domain position representing strongest coefficient relative to the describedOffset of window position S.

In some embodiments, the frequency domain position of the strongest coefficient corresponding to each layer is offset f from the window position S _Δ The same applies.

In some embodiments, the frequency domain position of the strongest coefficient is offset f from the window position S _Δ Determined according to the window length N, either configured by the network device or predefined.

In some embodiments, the port location indication information may have a bit width of K ₁ Bits or 2L bits, orBits orBits.

In some embodiments, the bit width of the frequency domain location indication information may be N bits orBits, where N represents the window length.

In some embodiments, the reporting, by the terminal device, the first indication information includes:

if the number of layers V is greater than 1, the terminal equipment reports V port position indication information and one frequency domain position indication information.

In some embodiments, the S is network device configured or predefined. Alternatively, in some embodiments, the communication unit may be a communication interface or transceiver, or an input/output interface of a communication chip or a system on a chip. The processing unit may be one or more processors.

It should be understood that the terminal device 300 according to the embodiment of the present application may correspond to the terminal device in the embodiment of the method of the present application, and the foregoing and other operations and/or functions of each unit in the terminal device 300 are respectively for implementing the corresponding flow of the terminal device in the method 200 shown in fig. 2, and are not described herein for brevity.

Fig. 4 is a schematic block diagram of a network device according to an embodiment of the application. The network device 400 of fig. 4 includes:

a communication unit 410, configured to send a CSI-RS resource set to a terminal device, where the CSI-RS resource set includes Ks CSI-RS resources, and each CSI-RS resource includes at least one CSI-RS port, where Ks is an integer greater than or equal to 1;

the communication unit 420 is further configured to receive channel state information CSI reported by the terminal device, where the CSI is determined according to the CSI-RS resource set and/or CSI related parameters, and the CSI includes a precoding matrix indicator PMI.

In some embodiments, the communication unit 410 is further configured to:

and receiving first indication information sent by the terminal equipment, wherein the first indication information is used for indicating the target CSI-RS resource for reporting the CSI.

In some embodiments, the first indication information includes Ks bits, or,a number of bits, wherein the K is the number of the plurality of CSI-RS resources,representing an upward rounding.

In some embodiments, the K is determined from the Ks and a first coefficient, which is a higher layer parameter or a predefined parameter.

In some embodiments, the target CSI-RS resource comprises a plurality of CSI-RS resources, and for each CSI-RS resource of the plurality of CSI-RS resources, the port sequence number of the PMI is mapped sequentially from a first CSI-RS port of the each CSI-RS resource to a last CSI-RS port of the each CSI-RS resource.

In some embodiments, the communication unit 410 is further configured to:

and receiving the PMI reported by the terminal equipment.

In some embodiments, the communication unit 410 is further configured to perform at least one of the following:

receiving M frequency domain base vectors reported by the terminal equipment;

receiving the starting positions of windows corresponding to the M frequency domain basis vectors reported by the terminal equipment;

receiving the strongest coefficient reported by the terminal equipment;

receiving a non-zero coefficient reported by the terminal equipment;

and receiving the CQI reported by the terminal equipment.

In some embodiments, the terminal device is configured to Or (b)Reporting the strongest coefficient by bit, wherein K ₁ 2L represents the CSI-RS port number of the CSI-RS resource selected by the terminal equipment for reporting the CSI.

If the rank is greater than 1, the terminal equipment passes throughThe strongest coefficient of each layer is reported by the bit, wherein alpha is a higher layer parameter or a predefined parameter,P _CSI-RS is the total number of CSI-RS ports for reporting CSI.

alternatively, in some embodiments, the communication unit may be a communication interface or transceiver, or an input/output interface of a communication chip or a system on a chip. The processing unit may be one or more processors.

It should be understood that the network device 400 according to the embodiment of the present application may correspond to the network device in the embodiment of the method of the present application, and the foregoing and other operations and/or functions of each unit in the network device 400 are respectively for implementing the corresponding flow of the network device in the method 200 shown in fig. 2, and are not further described herein for brevity.

Fig. 5 is a schematic block diagram of a communication device 500 according to an embodiment of the present application. The communication device 500 shown in fig. 5 comprises a processor 510, from which the processor 510 may call and run a computer program to implement the method in an embodiment of the application.

Optionally, as shown in fig. 5, the communication device 500 may also include a memory 520. Wherein the processor 510 may call and run a computer program from the memory 520 to implement the method in an embodiment of the application.

Wherein the memory 520 may be a separate device from the processor 510 or may be integrated into the processor 510.

Optionally, as shown in fig. 5, the communication device 500 may further include a transceiver 530, and the processor 510 may control the transceiver 530 to communicate with other devices, and in particular, may send information or data to other devices, or receive information or data sent by other devices.

Wherein the transceiver 530 may include a transmitter and a receiver. The transceiver 530 may further include antennas, the number of which may be one or more.

Optionally, the communication device 500 may be specifically a network device in the embodiment of the present application, and the communication device 500 may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the communication device 500 may be specifically a mobile terminal/terminal device according to the embodiment of the present application, and the communication device 500 may implement corresponding processes implemented by the mobile terminal/terminal device in each method according to the embodiment of the present application, which are not described herein for brevity.

Fig. 6 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 600 shown in fig. 6 includes a processor 610, and the processor 610 may call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 6, the chip 600 may further include a memory 620. Wherein the processor 610 may call and run a computer program from the memory 620 to implement the method in an embodiment of the application.

The memory 620 may be a separate device from the processor 610 or may be integrated into the processor 610.

Optionally, the chip 600 may also include an input interface 630. The processor 610 may control the input interface 630 to communicate with other devices or chips, and in particular, may acquire information or data sent by the other devices or chips.

Optionally, the chip 600 may further include an output interface 640. Wherein the processor 610 may control the output interface 640 to communicate with other devices or chips, and in particular, may output information or data to other devices or chips.

Optionally, the chip may be applied to the network device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the chip may be applied to a mobile terminal/terminal device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein for brevity.

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

Fig. 7 is a schematic block diagram of a communication system 700 provided in an embodiment of the present application. As shown in fig. 7, the communication system 700 includes a terminal device 710 and a network device 720.

The terminal device 710 may be configured to implement the corresponding functions implemented by the terminal device in the above method, and the network device 720 may be configured to implement the corresponding functions implemented by the network device in the above method, which are not described herein for brevity.

It should be appreciated that the processor of an embodiment of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the application may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memory is illustrative but not restrictive, and for example, the memory in the embodiments of the present application may be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct RAM (DR RAM), and the like. That is, the memory in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

The embodiment of the application also provides a computer readable storage medium for storing a computer program.

Optionally, the computer readable storage medium may be applied to a network device in the embodiment of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the computer readable storage medium may be applied to a mobile terminal/terminal device in the embodiment of the present application, and the computer program causes a computer to execute a corresponding procedure implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, which is not described herein for brevity.

The embodiment of the application also provides a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to a network device in the embodiment of the present application, and the computer program instructions cause a computer to execute corresponding processes implemented by the network device in each method in the embodiment of the present application, which are not described herein for brevity.

Optionally, the computer program product may be applied to a mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions cause a computer to execute corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, which are not described herein for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to a network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the computer program may be applied to a mobile terminal/terminal device in the embodiment of the present application, and when the computer program runs on a computer, the computer is caused to execute corresponding processes implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method for codebook reporting, comprising:

the method comprises the steps that terminal equipment receives a channel state information reference signal (CSI-RS) resource set sent by network equipment, wherein the CSI-RS resource set comprises Ks CSI-RS resources, each CSI-RS resource comprises at least one CSI-RS port, and Ks is an integer greater than or equal to 1;

the terminal equipment determines Channel State Information (CSI) according to the CSI-RS resource set and/or the CSI related parameter, wherein the CSI comprises a Precoding Matrix Indicator (PMI);

and the terminal equipment reports the CSI to the network equipment.
The method according to claim 1, wherein the CSI-related parameters comprise higher layer parameters and/or predefined parameters.
The method according to claim 1 or 2, wherein the densities of the Ks CSI-RS resources are the same, the densities of the Ks CSI-RS resources being 0.25.
A method according to claim 3, characterized in that the density of the Ks CSI-RS resources is 0.25 and the total number of ports for the Ks CSI-RS resources is 32.
The method according to any of claims 1-4, wherein the Ks CSI-RS resources are 1/D CSI-RS resources, wherein the D is a density of the Ks CSI-RS resources.
The method of claim 5, wherein D is a higher layer parameter or wherein D is a predefined parameter.
The method according to any of claims 1-6, wherein the resource block offsets of the Ks CSI-RS resources are different.
The method of claim 7, wherein the density of the Ks CSI-RS resources is 0.5, wherein the resource block offset of a first CSI-RS resource of the Ks CSI-RS resources is zero, and wherein the resource block offset of a second CSI-RS resource is 1; or alternatively

The density of the Ks CSI-RS resources is 0.25, the resource block offset of the first CSI-RS resource of the Ks CSI-RS resources is zero, the resource block offset of the second CSI-RS resource is 1, the resource block offset of the third CSI-RS resource is 2, and the resource block offset of the fourth CSI-RS resource is 3.
The method according to any of claims 1-8, wherein each CSI-RS resource comprises a first number of CSI-RS ports, the first number being 16 and/or 8, and wherein the Ks CSI-RS resources comprise 2 CSI-RS resources with a density of 0.5 for which only the total number of ports is a second number, the second number being 32 and/or 16.
The method of any of claims 1-8, wherein each CSI-RS resource comprises a CSI-RS port number of 8, and wherein the Ks CSI-RS resources comprise 4 CSI-RS resources with a density of 0.25 for a total port number of 32 for only the Ks CSI-RS resources.
The method according to any of claims 1-8, wherein a CSI-RS port number of all CSI-RS resources in the CSI-RS resource set does not exceed a first threshold.
The method according to any of claims 1-11, wherein the number of CSI-RS ports of all CSI-RS resources in the set of CSI-RS resources is the same.
The method according to any of claims 1-11, wherein the number of CSI-RS ports of all CSI-RS resources in the set of CSI-RS resources is different.
The method according to any of claims 1-13, wherein the number of CSI-RS resources Ks comprised by the set of CSI-RS resources is determined by the capability of the terminal device, and/or

The density of the Ks CSI-RS resources is 0.25, which is determined by the capability of the terminal equipment.
The method according to any one of claims 1-14, further comprising:

the terminal equipment determines a target CSI-RS resource in the Ks CSI-RS resources, wherein the target CSI-RS resource is used for reporting the CSI.
The method of claim 15, wherein the method further comprises:

and the terminal equipment sends first indication information to the network equipment, wherein the first indication information is used for indicating the target CSI-RS resource.
The method of claim 16, wherein the number of CSI-RS resources included in the target CSI-RS resource is one, and wherein the first indication information includes a CSI-RS resource indication CRI for indicating the one target CSI-RS resource; or alternatively

The target CSI-RS resource comprises a plurality of CSI-RS resources, and the first indication information indicates the plurality of CSI-RS resources in a bit map or combined mode.
The method of claim 17, wherein the first indication information comprises Ks bits, or,a number of bits, wherein the K is the number of the plurality of CSI-RS resources, Representing an upward rounding.
The method of claim 18, wherein K is a higher layer parameter or a predefined parameter, or wherein K is determined from the Ks.
The method of claim 19, wherein the K is determined from the Ks and a first coefficient, the first coefficient being a higher layer parameter or a predefined parameter.
The method according to any one of claims 15-21, further comprising:

and under the condition that the target CSI-RS resources comprise the Ks CSI-RS resources, the terminal equipment does not send CRI to the network equipment.
The method according to any one of claims 1-21, wherein the target CSI-RS resource comprises a plurality of CSI-RS resources, the method further comprising:

and for each CSI-RS resource in the plurality of CSI-RS resources, sequentially mapping the port sequence number of the PMI from the first CSI-RS port of each CSI-RS resource to the last CSI-RS port of each CSI-RS resource.
The method according to claim 1 or 2, wherein the Ks CSI-RS resources are 1 CSI-RS resource, the one CSI-RS resource comprising a plurality of CSI-RS port groups.
The method of claim 23, wherein the plurality of CSI-RS port groups have a same density and the plurality of CSI-RS port groups have a density of 0.25.
The method of claim 24, wherein a density of the plurality of CSI-RS port groups is 0.25 and a total port number for only the one CSI-RS resource is 32.
The method of any of claims 23-25, wherein the one CSI-RS resource comprises 1/P CSI-RS port groups, wherein P is a density of the plurality of CSI-RS port groups.
The method of claim 26, wherein P is a higher layer parameter or wherein P is a predefined parameter.
The method according to any of claims 23-27, wherein the resource block offsets of the plurality of CSI-RS port groups are different.
The method of claim 28, wherein the density of the plurality of CSI-RS port groups is 0.5, the resource block offset of a first CSI-RS port group of the plurality of CSI-RS port groups is zero, and the resource block offset of a second CSI-RS port group is 1; or alternatively

The density of the plurality of CSI-RS port groups is 0.25, the resource block offset of the first CSI-RS port group of the plurality of CSI-RS port groups is zero, the resource block offset of the second CSI-RS port group is 1, the resource block offset of the third CSI-RS port group is 2, and the resource block offset of the fourth CSI-RS port group is 3.
The method according to any of claims 23-29, wherein the one CSI-RS resource comprises a first number of CSI-RS ports of 16 and/or 8, and wherein the one CSI-RS resource comprises a second number of 2 total ports of 0.5 density for the one CSI-RS resource only, the second number being 32 and/or 16.
The method according to any of claims 23-29, wherein the one CSI-RS resource comprises a CSI-RS port number of 8, and wherein the one CSI-RS resource comprises 4 CSI-RS ports having a density of 0.25 for only the one CSI-RS resource with a total port number of 32.
The method according to any of claims 23-31, wherein a total CSI-RS port number of the one CSI-RS resource does not exceed a second threshold.
The method of any of claims 23-32, wherein each of the plurality of CSI-RS port groups comprises a same number of CSI-RS ports.
The method of any of claims 23-32, wherein each of the plurality of CSI-RS port groups comprises a different number of CSI-RS ports.
The method according to any of claims 23-34, wherein the number of CSI-RS port groups comprised by the one CSI-RS resource is determined by the capability of the terminal device, and/or

The density of the plurality of CSI-RS port groups is 0.25 determined by the capabilities of the terminal device.
The method of any of claims 23-35, wherein the CSI-RS port group is one or more code division multiplexing, CDM, groups.
The method according to any one of claims 23-36, wherein the one CSI-RS resource comprises 4 CDM groups if a total port number of the plurality of CSI-RS port groups is 32.
The method of claim 37, wherein if a density of the plurality of CSI-RS port groups is 0.25, each of the 4 CDM groups corresponds to one resource block offset; or alternatively

If the density of the plurality of CSI-RS port groups is 0.5, two CDM groups of the 4 CDM groups correspond to one resource block offset.
The method according to any one of claims 1-38, further comprising:

the terminal device determines at least one of the following information according to the higher layer parameters and/or the predefined parameters:

The number M of the frequency domain base vectors reported by the terminal equipment, wherein M is an integer greater than 1;

the number of PMI subbands R per channel quality indicator CQI subband;

the terminal equipment measures a window position S and a length N of the CSI-RS and/or the reported frequency domain base vector;

the terminal equipment reports the position f of the strongest coefficient ₀ ；

And the maximum nonzero coefficient number reported by the terminal equipment.
The method of claim 39, wherein M is a prime number.
The method of claim 39 or 40, wherein R is one of the following set of values: {1,2,4},{1,2,4,8}.
The method of claim 41, wherein R is one of {1,2,4,8} if and only if M > 1.
The method of any one of claims 39-42, wherein S is zero; or alternatively

The s=i×n ₃ A, wherein i=one of 0,1, …, a-1, wherein a is a higher layer parameter or a predefined parameter, N ₃ The number of PMI subbands.
The method of any one of claims 39-43, wherein N is a prime number.
The method of any one of claims 39-44, wherein f ₀ Zero; or alternatively

Said f ₀ ＝i×N ₃ B, wherein i=one of 0,1, …, b-1, wherein b is a higher layer parameter or a predefined parameter, N ₃ The number of PMI subbands.
The method according to any of the claims 39-45, wherein the terminal device reports the starting position M of the window of frequency domain basis vectors _initial ＝mod(f ₀ -Δ,N ₃ ) Wherein Δ is a high-level parameter or a predefined parameter;

the window for reporting the frequency domain base vector by the terminal equipment comprises a frequency domain base vector f epsilon mod (M _initial +i，N ₃ ) I=0, 1, …, N-1, where mod () represents a modulo operation.
The method according to any one of claims 39-46, wherein if M = 1, the rank is 1, the maximum non-zero coefficient number is K0, the rank is greater than 1, and the total maximum non-zero coefficient number for all layers is

If M>1, rank is equal to 1, and the maximum non-zero coefficient number isRank is greater than 1, and the total maximum non-zero coefficient number of all layers is

Wherein, P _CSI-RS the total number of CSI-RS ports for reporting the CSI is equal to or greater than 1, equal to or greater than 1 and greater than 1.
The method of claim 47, wherein α is a high-level parameter or a predefined parameter, β is a high-level parameter or a predefined parameter, and γ is a high-level parameter or a predefined parameter.
The method according to any of claims 39-48, wherein the reporting of the CSI by the terminal device to the network device comprises:

and the terminal equipment reports the PMI to the network equipment.
The method of claim 49, wherein the terminal device reporting the PMI to the network device comprises at least one of:

the terminal equipment reports the M frequency domain base vectors;

the terminal equipment reports the initial positions of windows corresponding to the M frequency domain basis vectors;

the terminal equipment reports the strongest coefficient;

the terminal equipment reports a non-zero coefficient;

the terminal equipment reports CQI;

the terminal equipment reports first indication information, wherein the first indication information is used for determining the strongest coefficient.
The method of claim 50, wherein the M frequency-domain basis vectors are selected from N frequency-domain basis vectors f εmod (S+i, N) ₃ )，i＝0,1,…,N-1。
The method of claim 51, wherein the terminal device is configured to communicate with the base station byThe bits report the frequency domain base vectors for each or all layers.
The method according to any of claims 50-52, wherein the terminal device is configured to communicate with the base station by Reporting the initial position of the window of the frequency domain base vector by bits, wherein each layer respectively usesAnd reporting the bits, or the frequency domain base vectors corresponding to each layer are the same.
The method according to any of claims 50-53, wherein the terminal device is configured to communicate with the base station byOr (b)Reporting the strongest coefficient by bit, wherein K ₁ 2L represents the CSI-RS port number of the CSI-RS resource selected by the terminal equipment for reporting the CSI.
The method according to any of claims 50-53, wherein if the rank is equal to 1, the terminal device passes throughReporting the strongest coefficient by bit, wherein K _NZ Representing the total non-zero coefficient number of all layers; or alternatively

If the rank is greater than 1, the terminal equipment passes throughThe strongest coefficient of each layer is reported by the bit, wherein alpha is a higher layer parameter or a predefined parameter,P _CSI-RS is the total number of CSI-RS ports for reporting CSI.
The method according to any of claims 50-53, wherein if the rank is equal to 1, the terminal device passes throughReporting the strongest coefficient by bit, wherein K _NZ Representing the total non-zero coefficient number of all layers; or alternatively

If the rank is greater than 1, the terminal equipment passes throughBit reporting each layerIs the strongest coefficient of (c), wherein,
The method according to any of claims 50-53, wherein if the rank is equal to 1, the terminal device passes throughReporting the strongest coefficient by bits; or alternatively

If the rank is greater than 1, the terminal device reports the layer where the strongest coefficient is located, and passes throughOr (b)Reporting the position of the strongest coefficient in the layer, wherein alpha is a high-layer parameter or a predefined parameter,
the method of any of claims 50-57, wherein if M is greater than 1, the terminal device only reports one non-zero coefficient for each CSI-RS port that the terminal device uses to report CSI.
The method according to any of claims 50-58, wherein the terminal device reporting CQI comprises:

the terminal equipment only reports the broadband CQI; or alternatively

If M is greater than 1, the terminal equipment reports the sub-band CQI.
The method of any one of claims 50-59, further comprising:

and the terminal equipment determines CQI according to at least one CSI-RS resource for reporting the CSI.
The method of any one of claims 50-60, further comprising:

the terminal device determines the CQI subband size according to higher layer parameters or predefined parameters.
The method of claim 61, wherein the CQI subband size is determined based on a reporting bandwidth and a first parameter, the first parameter being a higher layer parameter or a predefined parameter.
The method of claim 61, wherein the CQI subband size is determined based on a nominal subband size and a second parameter, the second parameter being a higher layer parameter or a predefined parameter, wherein the nominal subband size is determined based on a bandwidth portion BWP size and a higher layer parameter subband size.
The method of any one of claims 50-63, wherein the first indication information comprises port location indication information and/or frequency domain location indication information.
The method of claim 64, wherein the port location indication information is used to indicate a location of a CSI-RS port of a CSI-RS resource used to report CSI.
The method of claim 64 or 65, wherein the frequency domain location indication information is used to indicate frequency domain location information of strongest coefficients.
The method as set forth in claim 66, whereinWherein the frequency domain position indication information is used for indicating the offset f of the frequency domain position of the strongest coefficient relative to the window position S _Δ Or (b)

The frequency domain position indication information is used for indicating the absolute frequency domain position of the strongest coefficient.
The method of claim 68, wherein the absolute frequency domain position of the strongest coefficient is determined by mod (s+f _Δ N3), wherein N3 represents the number of PMI subbands, f _Δ Representing the offset of the frequency domain position of the strongest coefficient relative to the window position S.
The method of claim 67 or 68, wherein each layer corresponds to an offset f of a frequency domain position of a strongest coefficient relative to the window position S _Δ The same applies.
The method of claims 67-69, wherein the frequency domain position of the strongest coefficient is offset from the window position S by an amount f _Δ Determined according to the window length N, either configured by the network device or predefined.
The method of any of claims 64-69, wherein the port location indication information has a bit width of K ₁ Bits or 2L bits, orBits orBits.
The method of claims 64-69, wherein the frequency domain location indication information has a bit width that is comparable to a bit width of the frequency domain location indication informationTo N bits orBits, where N represents the window length.
The method according to claims 64-69, wherein the reporting the first indication information by the terminal device includes:

If the number of layers V is greater than 1, the terminal equipment reports V port position indication information and one frequency domain position indication information. 74. The method according to any of claims 39-43, wherein S is network device configured or predefined.
The codebook reporting method is characterized by comprising the following steps of

The method comprises the steps that network equipment sends a channel state information reference signal (CSI-RS) resource set to terminal equipment, wherein the CSI-RS resource set comprises Ks CSI-RS resources, each CSI-RS resource comprises at least one CSI-RS port, and Ks is an integer greater than or equal to 1;

and the network equipment reports Channel State Information (CSI) to the terminal equipment, wherein the CSI is determined according to the CSI-RS resource set and/or the CSI related parameters, and the CSI comprises a Precoding Matrix Indicator (PMI).
A terminal device, comprising:

a communication unit, configured to receive a CSI-RS resource set sent by a network device, where the CSI-RS resource set includes Ks CSI-RS resources, and each CSI-RS resource includes at least one CSI-RS port, where Ks is an integer greater than or equal to 1;

a processing unit, configured to determine channel state information CSI according to the CSI-RS resource set and/or CSI related parameters, where the CSI includes a precoding matrix indicator PMI;

The communication unit is further configured to: and reporting the CSI to the network equipment.
A network device, comprising:

a communication unit, configured to send a CSI-RS resource set to a terminal device, where the CSI-RS resource set includes Ks CSI-RS resources, and each CSI-RS resource includes at least one CSI-RS port, where Ks is an integer greater than or equal to 1; and

reporting Channel State Information (CSI) to the terminal equipment, wherein the CSI is determined according to the CSI-RS resource set and/or the CSI related parameters, and the CSI comprises a Precoding Matrix Indicator (PMI).
A terminal device, comprising: a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory, performing the method of any of claims 1 to 73.
A network device, comprising: a processor and a memory for storing a computer program, the processor for invoking and running the computer program stored in the memory to perform the method according to claim 74.
A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 73.
A chip, comprising: a processor for calling and running a computer program from memory, causing a device on which the chip is mounted to perform the method of claim 74.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 73.
A computer-readable storage medium storing a computer program that causes a computer to perform the method of claim 74.
A computer program product comprising computer program instructions which cause a computer to perform the method of any one of claims 1 to 73.
A computer program product comprising computer program instructions that cause a computer to perform the method of claim 74.
A computer program, characterized in that the computer program causes a computer to perform the method of any one of claims 1 to 73.
A computer program, characterized in that the computer program causes a computer to perform the method according to claim 74.