CN116097718A

CN116097718A - Feedback method and device for channel state information, terminal equipment and storage medium

Info

Publication number: CN116097718A
Application number: CN202080104508.XA
Authority: CN
Inventors: 黄莹沛; 陈文洪; 史志华; 方昀; 田杰娇
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2023-05-09
Also published as: WO2022061782A1

Abstract

The application discloses a feedback method, a device, terminal equipment and a storage medium of channel state information, and relates to the field of wireless communication. The method is applied to the terminal equipment, and comprises the following steps: determining configured CSI-RS resources; determining all or part of the CSI-RS in the configured CSI-RS resources as a target CSI-RS; generating channel state information according to the measurement result of the target CSI-RS; and reporting the channel state information.

Description

Feedback method and device for channel state information, terminal equipment and storage medium

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a method, an apparatus, a terminal device, and a storage medium for feeding back channel state information.

Background

In a New Radio (NR) system, a terminal device needs to feed back channel state information (Channel State Information, CSI) to a network device. In the related art, how to reduce the overhead of CSI feedback has not yet provided a better solution.

Disclosure of Invention

The embodiment of the application provides a feedback method, a device, a terminal device and a storage medium for channel state information, which can reduce the expenditure of CSI feedback. The technical scheme is as follows:

According to one aspect of the present application, there is provided a feedback method of channel state information, applied to a terminal device, the method including:

determining configured CSI-RS resources;

determining all or part of the CSI-RS in the configured CSI-RS resources as a target CSI-RS;

generating channel state information according to the measurement result of the target CSI-RS;

and reporting the channel state information.

According to an aspect of the present application, there is provided a feedback apparatus of channel state information, the apparatus comprising: the device comprises a determining module, a generating module and a reporting module;

the determining module is used for determining configured CSI-RS resources;

the determining module is used for determining all or part of the CSI-RS in the configured CSI-RS resources to be used as a target CSI-RS;

the generating module is used for generating channel state information according to the measurement result of the target CSI-RS;

the reporting module is used for reporting the channel state information.

According to an aspect of the present application, there is provided a terminal device comprising: a processor; a transceiver coupled to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement a method of feedback of channel state information as described in the above aspects.

According to one aspect of the present application, there is provided a computer readable storage medium having stored therein executable instructions that are loaded and executed by a processor to implement a method of feedback of channel state information as described in the above aspects.

According to an aspect of the present application, there is provided a computer program product or computer program comprising computer instructions stored in a computer readable storage medium, the computer instructions being read from the computer readable storage medium by a processor of a computer device, the computer instructions being executed by the processor to cause the computer device to perform the method of feedback of channel state information as described in the above aspects.

The technical scheme provided by the embodiment of the application at least comprises the following beneficial effects:

after the network device configures the CSI-RS resources for the terminal device, the terminal device may generate channel state information according to all or part of the CSI-RS therein, instead of generating channel state information only according to all of the CSI-RS therein, thereby reducing the overhead of the terminal device in feeding back the channel state information.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a block diagram of a communication system provided in an exemplary embodiment of the present application;

fig. 2 is a flowchart of a method for feeding back channel state information according to an exemplary embodiment of the present application;

fig. 3 is a flowchart of a method for feeding back channel state information according to an exemplary embodiment of the present application;

FIG. 4 is a schematic diagram of frequency division provided by an exemplary embodiment of the present application;

fig. 5 is a flowchart of a method for feeding back channel state information according to an exemplary embodiment of the present application;

fig. 6 is a schematic diagram of a terminal device using CSI-RS on a partial frequency band according to an exemplary embodiment of the present application;

fig. 7 is a flowchart of a method for feeding back channel state information according to an exemplary embodiment of the present application;

FIG. 8 is a schematic diagram of frequency domain resource partitioning provided by an exemplary embodiment of the present application;

fig. 9 is a schematic diagram of frequency domain resources in the same frequency domain resource subset corresponding to the same beam according to an exemplary embodiment of the present application;

FIG. 10 is a schematic diagram of space-frequency vectors provided by an exemplary embodiment of the present application;

fig. 11 is a flowchart of a method for feeding back channel state information according to an exemplary embodiment of the present application;

Fig. 12 is a flowchart of a method for feeding back channel state information according to an exemplary embodiment of the present application;

FIG. 13 is a diagram of grouping reporting of combining coefficients provided by an exemplary embodiment of the present application;

fig. 14 is a flowchart of a method for feeding back channel state information according to an exemplary embodiment of the present application;

fig. 15 is a block diagram of a channel state information feedback device according to an exemplary embodiment of the present application;

fig. 16 is a schematic structural diagram of a communication device according to an exemplary embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 shows a block diagram of a communication system provided in an exemplary embodiment of the present application, which may include: access network 12 and terminal equipment 14.

Access network 12 includes a number of network devices 120 therein. The network device 120 may be a base station, which is a means deployed in an access network to provide wireless communication functionality for terminals. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different radio access technologies, the names of base station capable devices may vary, for example in LTE systems, called enodebs or enbs; in a 5G NR-U system, it is called gNodeB or gNB. As communication technology evolves, the description of "base station" may change. For convenience in the embodiments of the present application, the above-mentioned devices for providing the terminal device 14 with the wireless communication function are collectively referred to as a network device.

The terminal device 14 may include various handheld devices, vehicle mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment, mobile Stations (MSs), terminals (terminal devices), etc. For convenience of description, the above-mentioned devices are collectively referred to as a terminal. The network device 120 and the terminal device 14 communicate with each other via some air interface technology, e.g. Uu interface.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: 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, LTE frequency division duplex (Frequency Division Duplex, FDD) system, LTE time division duplex (Time Division Duplex, TDD) system, long term evolution advanced (Advanced Long Term Evolution, LTE-a) system, new Radio (NR) system, evolution system of NR system, LTE (LTE-based access to Unlicensed spectrum, LTE-U) system on unlicensed frequency band, NR-U system, universal mobile telecommunication system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication system, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, wiFi), next generation communication 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, and internet of vehicles (Vehicle to Everything, V2X) systems, etc. The embodiments of the present application may also be applied to these communication systems.

Fig. 2 is a flowchart illustrating a method for feeding back channel state information according to an exemplary embodiment of the present application. The method may be applied in a terminal device as shown in fig. 1. The method comprises the following steps:

in step 210, configured CSI-RS resources are determined.

The CSI-RS resource is a resource for carrying a channel state information reference signal (Channel State Information ReferenceSignal, CSI-RS), and includes: at least one of CSI-RS time domain resources and CSI-RS frequency domain resources.

The CSI-RS is a physical signal for downlink channel sounding. The network device may send the CSI-RS to the terminal device, and the terminal device may measure the CSI-RS and report the measurement result to the network device, so that the network device may configure appropriate transmission parameters for subsequent downlink transmission according to the measurement result.

Illustratively, the CSI-RS resources are configured by the network device, and the terminal device may determine CSI-RS on the configured CSI-RS resources.

And 220, determining all or part of the CSI-RS in the configured CSI-RS resources as a target CSI-RS.

The target CSI-RS is a CSI-RS employed by the terminal device for determining channel state information.

In the CSI-RS carried by the CSI-RS resource, the terminal equipment can determine all or part of the CSI-RS in the configured CSI-RS resource through different dimensionalities, and the all or part of the CSI-RS is adopted as a target CSI-RS. The different dimensions mentioned above may refer to: the dimension of the antenna ports, the terminal equipment takes all the CSI-RSs as target CSI-RSs, and the number of the antenna ports corresponding to all the CSI-RSs is expanded; it may be referred to as: and the terminal equipment takes the CSI-RS on part of the frequency bands as a target CSI-RS.

The target CSI-RS is illustratively predefined in the standard, or is configured by higher layer parameters, or is indicated by the network device, which is not limited by the embodiments of the present application.

In step 230, channel state information is generated according to the measurement result of the target CSI-RS.

After determining the target CSI-RS, the terminal equipment measures the target CSI-RS to obtain a measurement result, and generates channel state information according to the measurement result.

Step 240, reporting channel state information.

And the terminal equipment reports the generated channel state information to the network equipment.

In summary, according to the method provided by the embodiment of the present application, after the network device configures the CSI-RS resource for the terminal device, the terminal device may generate the channel state information according to all or part of the CSI-RS, instead of only generating the channel state information according to all the CSI-RS, so as to reduce the overhead of the terminal device for feeding back the channel state information.

By means of frequency division, the terminal equipment can expand the number of antenna ports corresponding to all CSI-RSs in the configured CSI-RS resources.

In an alternative embodiment based on fig. 2, fig. 3 shows a flowchart of a method for feeding back channel state information provided in an exemplary embodiment of the present application. The method may be applied in a terminal device as shown in fig. 1. In the embodiment of the present application, step 220 is alternatively implemented as step 221:

in step 221, all CSI-RS in the configured CSI-RS resources are used as target CSI-RS.

Wherein, each target CSI-RS in a Resource Block (RB) group in one sub-band corresponds to different antenna ports in a frequency division mode; or, the target CSI-RS in the adjacent RBs corresponds to different antenna ports in a frequency division mode.

That is, the granularity of the frequency division may be RB group in the subband or may be a single RB. Such as: a first RB group in one subband corresponds to a first antenna port and a second RB group corresponds to a second antenna port; alternatively, two adjacent RBs, the first RB corresponds to the first antenna port and the second RB corresponds to the second antenna port. The following describes each of the above two cases as an example.

1) The target CSI-RS in each RB group in one subband corresponds to different antenna ports in a frequency division manner.

In an alternative embodiment, the RB group includes: consecutive N RBs in one sub-band, or alternatively N RBs in one sub-band. Wherein the RB group includes N RBs alternating in one subband means that: among N RBs in one RB set, a preset interval is reserved between any two adjacent RBs.

In the embodiment of the application, the network equipment performs the antenna port number P of the CSI-RS _CSI-RS The configuration is carried out, the terminal equipment can expand the number of antenna ports corresponding to the CSI-RS in a frequency division mode, and the number of antenna ports corresponding to the CSI-RS after the frequency division is P'. Reference is made to the following formula:

wherein P' is the number of ports corresponding to the target CSI-RS after frequency division, and P _CSI-RS Is the number of ports corresponding to the target CSI-RS configured by the network device,

is the number of RBs in one subband, and N is the number of RBs contained in one RB group. It will be appreciated that P 'may also be defined as P' =p _CSI-RS * d, d is an integer greater than 1.

Exemplary, referring to fig. 4 in combination, the number of antenna ports P of the target CSI-RS configured by the network device _CSI-RS 4, comprising: antenna port 3000, antenna port 3001, antenna port 3002 and antenna port 3003; the number of the antenna ports expanded in the frequency division mode is 8, and the following antenna ports are added: antenna port 3004, antenna port 3005, antenna port 3006 and antenna port 3007.

As shown in (a) of fig. 4, 4 RBs are included in one sub-band, and consecutive 2 RBs in each sub-band are divided into 1 RB group, then CSI-RS in RB 0 and RB 1 correspond to antenna ports 3000 to 3003, and CSI-RS in RB 2 and RB 3 correspond to antenna ports 3004 to 3007.

As shown in (b) of fig. 4, 4 RBs are included in one sub-band, and alternate 2 RBs in each sub-band are divided into 1 RB group, then CSI-RSs in RB 0 and RB 2 correspond to antenna ports 3000 to 3003, and CSI-RSs in RB 1 and RB 3 correspond to antenna ports 3004 to 3007.

As can be seen from (a) and (b) in fig. 4, for antenna port x of CSI-RS, CSI-RS in the ith RB group corresponds to antenna port x+i×p _CSI-RS . Such as: for antenna port 3000, the CSI-RS in the next RB group corresponds to antenna port 3004.

2) The target CSI-RS in the adjacent RBs correspond to different antenna ports in a frequency division mode.

As shown in (c) of fig. 4, the antenna port is determined by the sequence number of the RB, irrespective of the subband in which the RB is located. CSI-RSs in RB 0, RB 2, RB 4, RB 6, RB 8, and RB 10 correspond to antenna port 3000 to antenna port 3003, and CSI-RSs in RB 1, RB 3, RB 5, RB 7, RB 9, and RB 11 correspond to antenna port 3004 to antenna port 3007.

In summary, in the method provided in this embodiment, through a frequency division manner, the CSI-RS corresponds to more antenna ports, so that accuracy of channel measurement performed by the terminal device according to the CSI-RS is increased.

By using CSI-RS on a partial band, the bandwidth occupied by CSI-RS of each terminal device can be reduced.

In an alternative embodiment based on fig. 2, fig. 5 shows a flowchart of a method for feeding back channel state information provided in an exemplary embodiment of the present application. The method may be applied in a terminal device as shown in fig. 1. In the embodiment of the present application, step 220 is alternatively implemented as step 2221 or step 2222 or step 2223:

In step 2221, in the configured CSI-RS resources, the CSI-RS in the partial bandwidth is taken as the target CSI-RS.

In step 2222, in the configured CSI-RS resources, the CSI-RS in the part of RBs are taken as the target CSI-RS.

In step 2223, in the configured CSI-RS resources, the CSI-RS in the partial subband is taken as the target CSI-RS.

The terminal equipment determines partial CSI-RS as a target CSI-RS in the configured CSI-RS resources. In implementation, the terminal device may use the CSI-RS in a portion of the bandwidth or subband or RB as the target CSI-RS with the bandwidth or subband or RB as granularity.

In an alternative embodiment, the target CSI-RS is indicated by first downlink control information (Downlink Control Information, DCI) sent by the network device; or, the target CSI-RS is indicated by a higher layer parameter. That is, a first DCI, or higher layer parameter, that may be transmitted by a network device indicates the use of CSI-RS on a portion of the frequency band.

Exemplary, referring to fig. 6 in combination, the number of antenna ports P of the target CSI-RS configured by the network device _CSI-RS 4, comprising: antenna port 3000, antenna port 3001, antenna port 3002 and antenna port 3003. The network equipment distributes RB 0, RB 2, RB 4, RB 6, RB 8 and RB 10 for the terminal equipment, and the terminal equipment takes the CSI-RS in the RB 0, RB 2, RB 4, RB 6, RB 8 and RB 10 as a target CSI-RS and measures the target CSI-RS.

In summary, according to the method provided in the embodiment, by using CSI-RS on a partial frequency band, bandwidth occupied by CSI-RS of each terminal device can be reduced.

The terminal equipment divides the frequency domain resources into a plurality of frequency domain resource subsets.

In an alternative embodiment based on fig. 2, fig. 7 shows a flowchart of a method for feeding back channel state information provided in an exemplary embodiment of the present application. The method may be applied in a terminal device as shown in fig. 1. In the embodiment of the present application, step 240 is alternatively implemented as step 2411, step 2412, and step 2413:

in step 2411, dividing the frequency domain resources corresponding to the configured CSI-RS resources into M frequency domain resource subsets.

Wherein M is a positive integer. The terminal equipment divides the frequency domain resources corresponding to the configured CSI-RS resources into M frequency domain resource subsets. The length of the frequency domain resources included in each frequency domain resource subset may be the same or different, which is not limited in the embodiment of the present application.

In an alternative embodiment, the units of frequency domain resources are RBs; or, the unit of the frequency domain resource is a subband. The terminal device may divide the frequency domain resource subsets with granularity of RBs, one frequency domain resource subset including one or more RBs; subsets of frequency domain resources may also be partitioned at the granularity of subbands, with one subset of frequency domain resources comprising one or more subbands.

In an alternative embodiment, the frequency domain resources in the subset of frequency domain resources are contiguous frequency domain resources; or, the frequency domain resources in the subset of frequency domain resources are comb-shaped frequency domain resources. Wherein, comb-shaped frequency domain resources refer to: the different subsets of frequency domain resources are alternating in the frequency domain.

For example, refer to fig. 8 in combination. In one implementation, consecutive frequency domain resource 0, frequency domain resource 1, frequency domain resource 2, and frequency domain resource 3 belong to the same frequency domain resource subset, consecutive frequency domain resource 4, frequency domain resource 5, frequency domain resource 6, and frequency domain resource 7 belong to the same frequency domain resource subset, and consecutive frequency domain resource 8, frequency domain resource 9, frequency domain resource 10, and frequency domain resource 11 belong to the same frequency domain resource subset. In another implementation, interleaved frequency domain resource 0, frequency domain resource 3, frequency domain resource 6, and frequency domain resource 9 belong to the same frequency domain resource subset, interleaved frequency domain resource 1, frequency domain resource 4, frequency domain resource 7, and frequency domain resource 10 belong to the same frequency domain resource subset, and interleaved frequency domain resource 2, frequency domain resource 5, frequency domain resource 8, and frequency domain resource 11 belong to the same frequency domain resource subset.

Optionally, the frequency domain resources belonging to the same subset of frequency domain resources correspond to the same vector. For example, refer to fig. 9 in combination. Antenna port 1 corresponds to vector f1 and vector f2, vector f1 corresponding to one frequency domain resource subset and vector f2 corresponding to the other frequency domain resource subset. Antenna port 2 corresponds to vector f3 and vector f4, vector f3 corresponding to one frequency domain resource subset and vector f4 corresponding to the other frequency domain resource subset.

Step 2412, selecting K space-frequency vectors from the PM space-frequency vectors, and reporting the merging coefficients corresponding to the K space-frequency vectors.

Wherein P is a positive integer.

The M frequency domain resource subsets and the P antenna ports form PM space frequency vectors. The terminal equipment selects K space frequency vectors from PM space frequency vectors, and reports the merging coefficients corresponding to the K space frequency vectors.

Illustratively, referring to (a) in fig. 10 in combination, the 4 subsets of frequency domain resources and the 8 antenna ports constitute 32 space-frequency vectors. The terminal equipment selects from 32 space frequency vectors, selects 4 space frequency vectors and reports the merging coefficients corresponding to the 4 space frequency vectors.

Step 2413, selecting K/2 space-frequency vectors from PM/2 space-frequency vectors with the same polarization direction, and reporting the merging coefficients corresponding to the K/2 space-frequency vectors.

The M frequency domain resource subsets and the P antenna ports form PM/2 space frequency vectors with the same polarization direction. The terminal equipment selects from PM/2 space frequency vectors, selects K/2 space frequency vectors, and reports the merging coefficients corresponding to the K/2 space frequency vectors.

Illustratively, referring to (b) in fig. 10 in combination, the 4 subsets of frequency domain resources and the 8 antenna ports constitute 16 space-frequency vectors of the same polarization direction. The terminal equipment selects from 16 space frequency vectors, selects 2 space frequency vectors and reports the merging coefficients corresponding to the 2 space frequency vectors.

In summary, according to the method provided by the embodiment, the frequency domain resources corresponding to the configured CSI-RS resources are divided into M frequency domain resource subsets, so that a plurality of vectors corresponding to one antenna port can be implemented, and then compression of the frequency domain can be implemented, and meanwhile, the overhead of the CSI-RS resources is reduced.

The channel state information reported by the terminal device may include: and combining the coefficients. And when reporting the merging coefficients, the terminal equipment needs to quantize the merging coefficients and report the quantized merging coefficients. Next, quantization of the synthesized coefficients is exemplarily described.

In an alternative embodiment based on fig. 2, fig. 11 shows a flowchart of a method for feeding back channel state information provided in an exemplary embodiment of the present application. The method may be applied in a terminal device as shown in fig. 1. In the embodiment of the present application, step 240 is alternatively implemented as step 2421 or step 2422:

step 2421, determining a first mapping relation of the merging coefficients according to the maximum port number configured by the network equipment; and reporting the merging coefficients according to the first mapping relation.

Step 2422, determining a second mapping relationship of the combining coefficient according to the threshold value, where the second mapping relationship includes: a first sub-mapping relation corresponding to the merging coefficient within the threshold value and a second sub-mapping relation corresponding to the merging coefficient outside the threshold value; and reporting the merging coefficients according to the second mapping relation.

The channel state information comprises a merging coefficient, wherein the merging coefficient is a weighting coefficient corresponding to a space-frequency vector reported by the terminal equipment. Wherein the combining coefficients include: at least one of an amplitude coefficient and a phase coefficient.

Optionally, the amplitude coefficient includes: at least one of quantization step length of the amplitude coefficient and quantization bit number of the amplitude coefficient; the phase coefficients include: at least one of a phase shift keying mode of the phase coefficient and a quantization bit number of the phase coefficient.

And the terminal equipment acquires the mapping relation and reports the merging coefficient according to the mapping relation. The mapping relation includes: a first mapping relationship associated with a maximum number of ports configured by the network device. The merge factor varies with the maximum number of ports configured by the network device, such as: the quantization step size of the amplitude coefficient varies with the maximum port number; the quantization bit number of the amplitude coefficient varies with the maximum port number; the phase shift keying mode of the phase coefficient changes along with the maximum port number; the number of quantization bits of the phase coefficient varies with the maximum number of ports.

Illustratively, reference is made in connection with the following table one:

list one

As shown in table one, the quantization step size of the amplitude coefficient may be different for different maximum port numbers. When the maximum port number is 32, the quantization step length of the amplitude coefficient is-3 dB; when the maximum port number is 16, the quantization step length of the amplitude coefficient is-1.5 dB; when the maximum port number is 2, the quantization step size of the amplitude coefficient is-0.75 dB.

Illustratively, reference is made in connection with Table II below:

watch II

As shown in table two, the number of quantization bits for the amplitude coefficient may be different for different maximum numbers of ports. When the maximum port number is 32, the quantized bit number of the amplitude coefficient is 3 bits; when the maximum port number is 8, the quantization bit number of the amplitude coefficient is 2 bits; when the maximum port number is 2 or 4, the quantization bit number of the amplitude coefficient is 1bit.

The mapping relation includes: and a second mapping relation related to the threshold value. The threshold value may be predefined in a standard or may be configured by a high-level parameter, which is not limited in the embodiment of the present application. Wherein the second mapping relationship includes: and a first sub-mapping relation corresponding to the merging coefficient within the threshold value and a second sub-mapping relation corresponding to the merging coefficient outside the threshold value. That is, the terminal device reports the merging coefficients within the threshold value according to the first sub-mapping relation; and reporting the merging coefficients beyond the threshold value according to the second sub-mapping relation.

Illustratively, the threshold value is 4. Of all the merging coefficients, there are 4 merging coefficients quantized using 3 bits (corresponding to the first sub-map), and the other merging coefficients quantized using 2 bits (corresponding to the second sub-map).

In an alternative embodiment, the amplitude coefficient corresponds to a phase coefficient in a combined relationship. The correspondence of the amplitude coefficient and the phase coefficient has a combination relationship that: the quantization mode of the amplitude coefficient is associated with the quantization mode of the phase coefficient, and the quantization mode of the amplitude coefficient and the quantization mode of the phase coefficient form a fixed combination. Reference is made in combination to the following Table III:

watch III

Phase coefficient/amplitude coefficient	3 bits	2 bits	1bit
16PSK	YES
8PSK	YES	YES
QPSK		YES	YES

As shown in table three, when the phase coefficient adopts 16-phase shift keying (16 Phase Shift Keying,16PSK), the amplitude coefficient can be quantized by using 3 bits; when the phase coefficient adopts 8-phase shift keying (8 Phase Shift Keying,8PSK), the amplitude coefficient can be quantized by adopting 3 bits or 2 bits; where the phase coefficients are quadrature phase shift keyed (Quadrature Phase Shift Keying, QPSK), the amplitude coefficients may be quantized using either 2 bits or 1 bit.

In summary, in the method provided in this embodiment, the channel state information may include a combining coefficient, in this embodiment, a first mapping relationship and a second mapping relationship are provided for quantization of the combining coefficient, and the terminal device may report the combining coefficient according to one of the first mapping relationship and the second mapping relationship, so as to improve flexibility of a feedback method of the channel state information.

In an alternative embodiment based on fig. 2, fig. 12 shows a flowchart of a method for feeding back channel state information provided in an exemplary embodiment of the present application. The method may be applied in a terminal device as shown in fig. 1. In the embodiment of the present application, step 240 is alternatively implemented as step 243:

step 243, reporting at least one of the first channel state information and the second channel state information according to the indication of the second DCI sent by the network device.

Wherein the first channel state information includes: at least one of an indication of a port, an indication of a subset of frequency domain resources, an indication of a discrete fourier transform (Discrete Fourier Transform, DFT), a number of non-zero coefficients, and a number of layers; the second channel state information includes: and a combining coefficient including at least one of an amplitude coefficient and a phase coefficient.

The port indication is used for indicating the terminal equipment to report the selected port, the frequency domain resource subset indication is used for indicating the frequency domain resource subset selected by the terminal equipment, the DFT vector indication is used for indicating the frequency domain vector reported by the terminal equipment, the nonzero coefficient refers to a coefficient which is not 0 in the reported merging coefficient, the layer number refers to the number of layers adopted for transmission between the terminal equipment and the network equipment, and the merging coefficient is a weighting coefficient corresponding to the space-frequency vector reported by the terminal equipment. Alternatively, the indication of the port may alternatively be implemented as: a bitmap (bitmap) or a combined indication for determining the position of non-zero coefficients.

The channel state information may be composed of two parts including first channel state information and second channel state information. The terminal device may determine to report part of the channel state information or all of the channel state information according to an indication of the second DCI from the network device. It may be understood that the channel state information may also include other parts, and the first state information and the second state information may also include other information, which is not limited in this embodiment of the present application.

In an alternative embodiment, the terminal device reports the first channel state information through a physical uplink control channel (Physical Uplink Control Channel, PUCCH); or, reporting the second channel state information through a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH); or reporting the first channel state information and the second channel state information through the PUSCH. That is, when the terminal device reports the channel state information, the first channel state information is transmitted on the PUCCH, or the second channel state information is transmitted on the PUSCH, or the first channel state information and the second channel state information are transmitted on the PUSCH.

In an alternative embodiment, the terminal device reports at least one of the first channel state information and the second channel state information, including: the terminal equipment determines a port selection set, wherein the port selection set comprises antenna ports indicated by the network equipment; selecting at least one antenna port from the port selection set; determining a combining coefficient corresponding to at least one antenna port; and reporting the merging coefficients.

The antenna ports in the port selection set are used for the terminal equipment to select the antenna ports. Illustratively, the port selection set includes: antenna port 1, antenna port 2 and antenna port 3. The terminal device may select at least one antenna port from the 3 antenna ports, and report a combining coefficient corresponding to the selected antenna port.

In an alternative embodiment, the terminal device may determine the port selection set by any one of the following means: the terminal equipment determines a port selection set according to the indication of the third DCI sent by the network equipment; or, determining a port selection set according to an indication of a media access control cell (Medium AccessControlControl Element, MAC CE) sent by the network device; or determining the port selection set adopted by the current report according to the port selection set adopted by the last report.

Optionally, the port selection set is indicated by a form of bitmap (bitmap).

In an alternative embodiment, when the terminal device reports the merging coefficients, multiple reporting is adopted: the terminal equipment divides the merging coefficients into at least one reporting group; and reporting first indication information, wherein the first indication information is used for informing network equipment of the associated reporting group.

Optionally, after the terminal device finishes reporting the at least one reporting group, reporting the first indication information to the network device; the first indication information may also be reported to the network device before reporting the at least one reporting group; the first indication information may also be reported to the network device in the process of reporting at least one reporting group, and in this embodiment of the present application, reporting timing of the first indication information is not limited.

For example, refer to fig. 13 in combination. The terminal equipment divides the merging coefficients into 2 reporting groups, and one reporting group comprises: the merging coefficients corresponding to the CSI-RS port X are included in the other reporting group: and combining coefficients corresponding to the CSI-RS ports Y. The terminal device reports the first report group for the first time and reports the second report group for the second time. The network device associates the two reporting groups according to the indication of the first indication information of the terminal device, and then uses the CSI-RS port X+Y to perform physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) precoding.

In an alternative embodiment, the terminal device reports the merging coefficients by means of differential reporting.

Wherein, the differential reporting refers to: setting a reference merging coefficient, and reporting the merging coefficient by reporting the difference value between the merging coefficient and the reference coefficient.

The terminal device determines, for example, a reference amplitude coefficient p ₀ And reference phase coefficient c ₀ Reference to the merging coefficient h ₀ The method comprises the following steps: h is a ₀ ＝p ₀ c ₀ . Wherein p is ₀ Quantization for 3bit amplitude

c ₀ 16PSK. For the merging coefficient h ₁ ，h ₁ ＝h ₀ p _x c _x The terminal equipment only needs to report the amplitude difference value p _x And a phase difference score c _x Can realize the combination coefficient h ₁ Is reported by the differential of (a). Wherein the amplitude difference value p _x E { -X,0, X, Y }, phase difference score c _x Is QPSK. X and Y are db values of the amplitude.

In summary, in the method provided in this embodiment, the channel state information may be formed by two parts, including the first channel state information and the second channel state information, and the terminal device may determine the reported channel state information according to the indication of the second DCI from the network device, so that the overhead of single feedback is reduced when only one part of the channel state information is reported.

In an alternative embodiment based on fig. 2, fig. 14 shows a flowchart of a method for feeding back channel state information provided in an exemplary embodiment of the present application. The method may be applied in a terminal device as shown in fig. 1. In the embodiment of the present application, step 240 is alternatively implemented as step 2441 and step 2442:

step 2441, report second instruction information, where the second instruction information is used to indicate, to the network device, a codebook type when reporting channel state information.

The terminal equipment can adopt different codebook types to report the channel state information, and the terminal equipment performs independent selection on the adopted codebook types and indicates the codebook types when the network equipment reports the channel state information by itself in the form of second indication information.

In an alternative embodiment, the codebook types include: the third generation partnership project (3rd Generation Partnership Project,3GPP) protocol R16 defines a codebook type for channel state information, and the 3GPP protocol R17 defines a codebook type for channel state information.

Step 2442, reporting the channel state information by using the codebook corresponding to the codebook type.

In an optional embodiment, the terminal device determines the codebook type adopted for reporting the channel state information according to whether the beam sent by the network device is accurate, and adopts the codebook corresponding to the determined codebook type to report the channel state information. When the network device uses the beam to perform downlink transmission, the direction of the actually transmitted beam may be different from the direction of the ideal beam, and the terminal device supports determining whether the beam transmitted by the network device is accurate.

For example, when the CSI-RS sent by the network device adopts an accurate beam, the terminal device sends second indication information to the network device, and the codebook type when the indication terminal device reports the channel state information is the codebook type defined by the 3GPP protocol R17 for the channel state information.

For example, when the CSI-RS sent by the network device adopts an inaccurate beam, the terminal device sends second indication information to the network device, and the codebook type when the indication terminal device reports the channel state information is the codebook type defined by the 3GPP protocol R16 for the channel state information.

In summary, according to the method provided in this embodiment, the terminal device may adjust the codebook type when reporting the channel state information according to whether the beam adopted when the network device sends is accurate, and send the second indication information to the network device to notify the network device in time.

The above method embodiments may be implemented individually or in combination, and the present application is not limited thereto.

In the above embodiments, the step performed by the terminal device may separately implement a feedback method of channel state information to be the terminal device side, and the step performed by the network device may separately implement a feedback method of channel state information to be the network device side.

Fig. 15 is a block diagram illustrating a channel state information feedback apparatus according to an exemplary embodiment of the present application, where the apparatus may be implemented as a terminal device or as a part of a terminal device, and the apparatus includes: a determining module 1501, a generating module 1502 and a reporting module 1503;

A determining module 1501 for determining configured CSI-RS resources;

a determining module 1501, configured to determine all or part of CSI-RS in the configured CSI-RS resources as a target CSI-RS;

a generating module 1502, configured to generate channel state information according to a measurement result of a target CSI-RS;

and a reporting module 1503, configured to report the channel state information.

In an alternative embodiment, determining module 1501 is configured to take all CSI-RS in the configured CSI-RS resources as target CSI-RS; the method comprises the steps that target CSI-RSs in each Resource Block (RB) group in one sub-band correspond to different antenna ports in a frequency division mode; or, the target CSI-RS in the adjacent RBs corresponds to different antenna ports in a frequency division mode.

In an alternative embodiment, the RB group includes: consecutive N RBs in one sub-band, or alternatively N RBs in one sub-band.

In an alternative embodiment of the present invention,

is the number of RBs in one subband.

In an alternative embodiment, determining module 1501 is configured to use CSI-RS in the partial bandwidth as the target CSI-RS in the configured CSI-RS resources; or, determining module 1501 is configured to use CSI-RS in part of RBs as a target CSI-RS in the configured CSI-RS resources; or, the determining module 1501 is configured to use the CSI-RS in the partial subband as the target CSI-RS in the configured CSI-RS resources.

In an alternative embodiment, the target CSI-RS is indicated by first downlink control information DCI sent by the network device; or, the target CSI-RS is indicated by a higher layer parameter.

In an optional embodiment, the determining module 1501 is configured to divide the frequency domain resources corresponding to the configured CSI-RS resources into M frequency domain resource subsets, where M is a positive integer, where the M frequency domain resource subsets and the P antenna ports form PM space-frequency vectors, or PM/2 space-frequency vectors with the same polarization direction, and P is a positive integer; the reporting module 1503 is configured to select K space-frequency vectors from the PM space-frequency vectors, report merging coefficients corresponding to the K space-frequency vectors, where K is a positive integer; or, a reporting module 1503, configured to select K/2 space-frequency vectors from the PM/2 space-frequency vectors with the same polarization direction, and report a merging coefficient corresponding to the K/2 space-frequency vectors.

In an alternative embodiment, the frequency domain resources in the subset of frequency domain resources are contiguous frequency domain resources; or, the frequency domain resources in the subset of frequency domain resources are comb-shaped frequency domain resources.

In an alternative embodiment, the units of frequency domain resources are RBs; or, the unit of the frequency domain resource is a subband.

In an alternative embodiment, the channel state information includes: a combining coefficient including at least one of an amplitude coefficient and a phase coefficient; a determining module 1501, configured to determine a first mapping relationship of combining coefficients according to a maximum port number configured by the network device; a reporting module 1503, configured to report the combining coefficient according to the first mapping relationship; or, the determining module 1501 is configured to determine, according to the threshold value, a second mapping relationship of the combining coefficient, where the second mapping relationship includes: a first sub-mapping relation corresponding to the merging coefficient within the threshold value and a second sub-mapping relation corresponding to the merging coefficient outside the threshold value; and a reporting module 1503, configured to report the combining coefficient according to the second mapping relationship.

In an alternative embodiment, the amplitude coefficients include: at least one of quantization step length of the amplitude coefficient and quantization bit number of the amplitude coefficient; the phase coefficients include: at least one of a phase shift keying mode of the phase coefficient and a quantization bit number of the phase coefficient.

In an alternative embodiment, the amplitude coefficient corresponds to a phase coefficient in a combined relationship.

In an alternative embodiment, the channel state information includes: first channel state information and second channel state information; a reporting module 1503, configured to report at least one of the first channel state information and the second channel state information according to an indication of the second DCI sent by the network device; wherein the first channel state information includes: at least one of port indication, frequency domain resource subset indication, DFT vector indication, number of non-zero coefficients and layer number; the second channel state information includes: and a combining coefficient including at least one of an amplitude coefficient and a phase coefficient.

In an optional embodiment, a reporting module 1503 is configured to report the first channel state information through a PUCCH; or, a reporting module 1503, configured to report the second channel state information through PUSCH; or, a reporting module 1503 is configured to report the first channel state information and the second channel state information through PUSCH.

In an alternative embodiment, determining module 1501 is configured to determine a port selection set, the port selection set including antenna ports indicated by the network device; a determining module 1501 for selecting at least one antenna port in the port selection set; a determining module 1501 for determining a combining coefficient corresponding to at least one antenna port; and a reporting module 1503, configured to report the merging coefficients.

In an alternative embodiment, determining module 1501 is configured to determine, according to an indication of a third DCI sent by the network device, a port selection set; or, a determining module 1501, configured to determine, according to an indication of a MAC CE sent by a network device, a port selection set; or, determining module 1501 is configured to determine, according to the port selection set adopted by the last report, the port selection set adopted by the current report.

In an alternative embodiment, determining module 1501 is configured to divide the merging coefficients into at least one report group; the reporting module 1503 is configured to report first indication information, where the first indication information is used to notify the network device that the reporting group is associated.

In an alternative embodiment, the reporting module 1503 is configured to report the merging coefficients by means of differential reporting.

In an optional embodiment, the reporting module 1503 is configured to report second indication information, where the second indication information is used to indicate, to the network device, a codebook type when reporting channel state information; and the reporting module 1503 is configured to report the channel state information by using a codebook corresponding to the codebook type.

Fig. 16 shows a schematic structural diagram of a communication device (terminal device or network device) according to an exemplary embodiment of the present application, where the communication device includes: a processor 101, a receiver 102, a transmitter 103, a memory 104, and a bus 105.

The processor 101 includes one or more processing cores, and the processor 101 executes various functional applications and information processing by running software programs and modules.

The receiver 102 and the transmitter 103 may be implemented as one communication component, which may be a communication chip.

The memory 104 is connected to the processor 101 via a bus 105.

The memory 104 may be used to store at least one instruction that the processor 101 is configured to execute to implement the various steps of the method embodiments described above.

Further, the memory 104 may be implemented by any type of volatile or nonvolatile storage device or combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable Read-Only Memory (EEPROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), static random access Memory (Static Random Access Memory, SRAM), read-Only Memory (ROM), magnetic Memory, flash Memory, programmable Read-Only Memory (Programmable Read-Only Memory, PROM).

In an exemplary embodiment, there is also provided a computer readable storage medium having stored therein at least one instruction, at least one program, a set of codes, or a set of instructions, which are loaded and executed by a processor to implement the feedback method of channel state information performed by a communication device provided by the above respective method embodiments.

In an exemplary embodiment, there is also provided a computer program product or a computer program comprising computer instructions stored in a computer readable storage medium, the computer instructions being read from the computer readable storage medium by a processor of a computer device, the computer instructions being executed by the processor, causing the computer device to perform the feedback method of channel state information as described in the above aspects.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The foregoing description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, since it is intended that all modifications, equivalents, improvements, etc. that fall within the spirit and scope of the invention.

Claims

A method for feeding back channel state information, which is applied to a terminal device, the method comprising:

determining configured channel state information reference signal (CSI-RS) resources;

determining all or part of the CSI-RS in the configured CSI-RS resources as a target CSI-RS;

generating channel state information according to the measurement result of the target CSI-RS;

and reporting the channel state information.
The method of claim 1, wherein the determining all or part of the CSI-RS in the configured CSI-RS resources as the target CSI-RS comprises:

taking all the CSI-RSs in the configured CSI-RS resources as the target CSI-RSs;

wherein, the target CSI-RS in each Resource Block (RB) group in one sub-band corresponds to different antenna ports in a frequency division mode; or, the target CSI-RS in the adjacent RBs corresponds to different antenna ports in a frequency division mode.
The method of claim 2, wherein the step of determining the position of the substrate comprises,

the RB group includes: consecutive N RBs in one sub-band, or alternatively N RBs in one sub-band.
The method of claim 3, wherein the step of,

wherein, the P' is the port number corresponding to the target CSI-RS after frequency division, and the P _CSI-RS The port number corresponding to the target CSI-RS configured by the network equipment is that
Is the number of RBs in one subband.
The method of claim 1, wherein the determining all or part of the CSI-RS in the configured CSI-RS resources as the target CSI-RS comprises:

taking the CSI-RS in the partial bandwidth as the target CSI-RS in the configured CSI-RS resource;

or, in the configured CSI-RS resource, taking the CSI-RS in part of RBs as the target CSI-RS;

or, in the configured CSI-RS resource, taking the CSI-RS in a part of the subbands as the target CSI-RS.
The method of claim 5, wherein the step of determining the position of the probe is performed,

the target CSI-RS is indicated by first downlink control information DCI sent by network equipment;

or, the target CSI-RS is indicated by a higher layer parameter.
The method of claim 1, wherein the reporting the channel state information comprises:

Dividing the frequency domain resources corresponding to the configured CSI-RS resources into M frequency domain resource subsets, wherein M is a positive integer, the M frequency domain resource subsets and P antenna ports form PM space frequency vectors, or PM/2 space frequency vectors with the same polarization direction, and P is a positive integer;

k space frequency vectors are selected from the PM space frequency vectors, merging coefficients corresponding to the K space frequency vectors are reported, and K is a positive integer;

or selecting K/2 space-frequency vectors from the PM/2 space-frequency vectors with the same polarization direction, and reporting the merging coefficients corresponding to the K/2 space-frequency vectors.
The method of claim 7, wherein the step of determining the position of the probe is performed,

the frequency domain resources in the subset of frequency domain resources are contiguous frequency domain resources;

or, the frequency domain resources in the frequency domain resource subset are comb-shaped frequency domain resources.
The method of claim 7, wherein the step of determining the position of the probe is performed,

the unit of the frequency domain resource is RB;

or, the frequency domain resource unit is a subband.
The method of claim 1, wherein the channel state information comprises: a combining coefficient including at least one of an amplitude coefficient and a phase coefficient;

The reporting the channel state information includes:

determining a first mapping relation of the merging coefficients according to the maximum port number configured by the network equipment; reporting the merging coefficients according to the first mapping relation;

or alternatively, the first and second heat exchangers may be,

determining a second mapping relation of the merging coefficients according to a threshold value, wherein the second mapping relation comprises: a first sub-mapping relation corresponding to a merging coefficient within the threshold value and a second sub-mapping relation corresponding to a merging coefficient outside the threshold value; and reporting the merging coefficients according to the second mapping relation.
The method of claim 10, wherein the step of determining the position of the first electrode is performed,

the amplitude coefficient includes: at least one of a quantization step size of the amplitude coefficient and a quantization bit number of the amplitude coefficient;

the phase coefficient includes: at least one of a phase shift keying mode of the phase coefficient and a quantization bit number of the phase coefficient.
The method of claim 11, wherein the magnitude coefficients correspond to a combination of the phase coefficients.
The method of claim 1, wherein the channel state information comprises: first channel state information and second channel state information;

The reporting the channel state information includes:

reporting at least one of the first channel state information and the second channel state information according to an indication of a second DCI sent by the network equipment;

wherein the first channel state information includes: at least one of port indication, frequency domain resource subset indication, discrete Fourier Transform (DFT) vector indication, number of non-zero coefficients and number of layers; the second channel state information includes: and a combining coefficient including at least one of an amplitude coefficient and a phase coefficient.
The method of claim 13, wherein said reporting at least one of the first channel state information and the second channel state information comprises:

reporting the first channel state information through a Physical Uplink Control Channel (PUCCH);

or reporting the second channel state information through a Physical Uplink Shared Channel (PUSCH);

or reporting the first channel state information and the second channel state information through the PUSCH.
The method of claim 13, wherein said reporting at least one of the first channel state information and the second channel state information comprises:

Determining a port selection set, wherein the port selection set comprises antenna ports indicated by the network equipment;

selecting at least one antenna port from the port selection set;

determining a combining coefficient corresponding to the at least one antenna port;

and reporting the merging coefficients.
The method of claim 15, wherein the determining the port selection set comprises:

determining the port selection set according to the indication of the third DCI sent by the network equipment;

or determining the port selection set according to the indication of the media access control cell (MAC CE) sent by the network equipment;

or determining the port selection set adopted by the current report according to the port selection set adopted by the last report.
The method of claim 13, wherein the method further comprises:

dividing the merging coefficients into at least one reporting group;

reporting first indication information, wherein the first indication information is used for notifying the network equipment to associate the reporting group.
The method of claim 13, wherein said reporting at least one of the first channel state information and the second channel state information comprises:

And reporting the merging coefficients in a differential reporting mode.
The method of claim 1, wherein the reporting the channel state information comprises:

reporting second indication information, wherein the second indication information is used for indicating a codebook type when reporting the channel state information to network equipment;

and reporting the channel state information by adopting a codebook corresponding to the codebook type.
A feedback device for channel state information, the device comprising: the device comprises a determining module, a generating module and a reporting module;

the determining module is used for determining configured channel state information reference signal (CSI-RS) resources;

the determining module is configured to determine all or part of CSI-RS in the configured CSI-RS resources as a target CSI-RS;

the generating module is used for generating channel state information according to the measurement result of the target CSI-RS;

the reporting module is used for reporting the channel state information.
The apparatus of claim 20, wherein the device comprises a plurality of sensors,

the determining module is configured to use all CSI-RS in the configured CSI-RS resources as the target CSI-RS;

wherein, the target CSI-RS in each Resource Block (RB) group in one sub-band corresponds to different antenna ports in a frequency division mode; or, the target CSI-RS in the adjacent RBs corresponds to different antenna ports in a frequency division mode.
The apparatus of claim 21, wherein the device comprises a plurality of sensors,

the RB group includes: consecutive N RBs in one sub-band, or alternatively N RBs in one sub-band.
The apparatus of claim 22, wherein the device comprises a plurality of sensors,

wherein, the P' is the port number corresponding to the target CSI-RS after frequency division, and the P _CSI-RS The port number corresponding to the target CSI-RS configured by the network equipment is that
Is the number of RBs in one subband.
The apparatus of claim 20, wherein the device comprises a plurality of sensors,

the determining module is configured to use, in the configured CSI-RS resource, a CSI-RS in a partial bandwidth as the target CSI-RS;

or, the determining module is configured to use, in the configured CSI-RS resource, a CSI-RS in a part of RBs as the target CSI-RS;

or, the determining module is configured to use the CSI-RS in a part of the subbands as the target CSI-RS in the configured CSI-RS resources.
The apparatus of claim 24, wherein the device comprises a plurality of sensors,

the target CSI-RS is indicated by first downlink control information DCI sent by network equipment;

or, the target CSI-RS is indicated by a higher layer parameter.
The apparatus of claim 20, wherein the device comprises a plurality of sensors,

The determining module is configured to divide the frequency domain resources corresponding to the configured CSI-RS resources into M frequency domain resource subsets, where M is a positive integer, where the M frequency domain resource subsets and P antenna ports form PM space-frequency vectors, or PM/2 space-frequency vectors with the same polarization direction, and P is a positive integer;

the reporting module is configured to select K space-frequency vectors from the PM space-frequency vectors, and report a merging coefficient corresponding to the K space-frequency vectors, where K is a positive integer;

or the reporting module is configured to select K/2 space-frequency vectors from the PM/2 space-frequency vectors with the same polarization direction, and report a merging coefficient corresponding to the K/2 space-frequency vectors.
The apparatus of claim 26, wherein the device comprises a plurality of sensors,

the frequency domain resources in the subset of frequency domain resources are contiguous frequency domain resources;

or, the frequency domain resources in the frequency domain resource subset are comb-shaped frequency domain resources.
The apparatus of claim 26, wherein the device comprises a plurality of sensors,

the unit of the frequency domain resource is RB;

or, the frequency domain resource unit is a subband.
The apparatus of claim 20, wherein the channel state information comprises: a combining coefficient including at least one of an amplitude coefficient and a phase coefficient;

The determining module is used for determining a first mapping relation of the merging coefficients according to the maximum port number configured by the network equipment; the reporting module is used for reporting the merging coefficients according to the first mapping relation;

or alternatively, the first and second heat exchangers may be,

the determining module is configured to determine, according to a threshold value, a second mapping relationship of the combining coefficient, where the second mapping relationship includes: a first sub-mapping relation corresponding to a merging coefficient within the threshold value and a second sub-mapping relation corresponding to a merging coefficient outside the threshold value; and the reporting module is used for reporting the merging coefficients according to the second mapping relation.
The apparatus of claim 29, wherein the device comprises a plurality of sensors,

the amplitude coefficient includes: at least one of a quantization step size of the amplitude coefficient and a quantization bit number of the amplitude coefficient;

the phase coefficient includes: at least one of a phase shift keying mode of the phase coefficient and a quantization bit number of the phase coefficient.
The apparatus of claim 30, wherein the magnitude coefficients correspond to a combination of the phase coefficients.
The apparatus of claim 20, wherein the channel state information comprises: first channel state information and second channel state information;

The reporting module is configured to report at least one of the first channel state information and the second channel state information according to an indication of the second DCI sent by the network device;

wherein the first channel state information includes: at least one of port indication, frequency domain resource subset indication, discrete Fourier Transform (DFT) vector indication, number of non-zero coefficients and number of layers; the second channel state information includes: and a combining coefficient including at least one of an amplitude coefficient and a phase coefficient.
The apparatus of claim 32, wherein the device comprises a plurality of sensors,

the reporting module is configured to report the first channel state information through a physical uplink control channel PUCCH;

or, the reporting module is configured to report the second channel state information through a physical uplink shared channel PUSCH;

or the reporting module is configured to report the first channel state information and the second channel state information through the PUSCH.
The apparatus of claim 32, wherein the device comprises a plurality of sensors,

the determining module is configured to determine a port selection set, where the port selection set includes an antenna port indicated by the network device;

The determining module is used for selecting at least one antenna port from the port selection set;

the determining module is used for determining a combining coefficient corresponding to the at least one antenna port;

and the reporting module is used for reporting the merging coefficients.
The apparatus of claim 34, wherein the device comprises a plurality of sensors,

the determining module is configured to determine the port selection set according to an indication of a third DCI sent by the network device;

or, the determining module is configured to determine the port selection set according to an indication of a media access control cell MAC CE sent by the network device;

or the determining module is used for determining the port selection set adopted by the current report according to the port selection set adopted by the last report.
The apparatus of claim 32, wherein the device comprises a plurality of sensors,

the determining module is used for dividing the merging coefficients into at least one reporting group;

the reporting module is configured to report first indication information, where the first indication information is used to inform the network device that the reporting group is associated.
The apparatus of claim 32, wherein the device comprises a plurality of sensors,

And the reporting module is used for reporting the merging coefficients in a differential reporting mode.
The apparatus of claim 20, wherein the device comprises a plurality of sensors,

the reporting module is configured to report second indication information, where the second indication information is used to indicate, to a network device, a codebook type when reporting the channel state information;

and the reporting module is used for reporting the channel state information by adopting a codebook corresponding to the codebook type.
A terminal device, characterized in that the terminal device comprises:

a processor;

a transceiver coupled to the processor;

a memory for storing executable instructions of the processor;

wherein the processor is configured to load and execute the executable instructions to implement the method of feedback of channel state information as claimed in any one of claims 1 to 19.
A computer readable storage medium having stored therein executable instructions that are loaded and executed by a processor to implement the method of channel state information feedback of any of claims 1 to 19.