WO2023160456A1

WO2023160456A1 - Channel information reporting method and apparatus, and network-side device, terminal and medium

Info

Publication number: WO2023160456A1
Application number: PCT/CN2023/076476
Authority: WO
Inventors: 任千尧; 袁江伟
Original assignee: 维沃移动通信有限公司
Priority date: 2022-02-23
Filing date: 2023-02-16
Publication date: 2023-08-31
Also published as: CN116683955A

Abstract

The present application belongs to the technical field of communications. Disclosed are a channel information reporting method and apparatus, and a network-side device, a terminal and a medium. The channel information reporting method in the embodiments of the present application comprises: a network-side device sending a tracking reference signal (TRS) to a terminal; the network-side device receiving a Doppler parameter from the terminal; and the network-side device performing channel prediction on the basis of the Doppler parameter, wherein the Doppler parameter is determined by the terminal on the basis of the TRS.

Description

Channel information reporting method, device, network side equipment, terminal and medium

Cross References to Related Applications

This application claims priority to Chinese Patent Application No. 202210167732.4 filed in China on February 23, 2022, the entire contents of which are hereby incorporated by reference.

technical field

The present application belongs to the technical field of communication, and specifically relates to a channel information reporting method, device, network side equipment, terminal and medium.

Background technique

According to information theory, accurate channel state information (CSI) is crucial to channel capacity. Especially for a multi-antenna system, the transmitting end can optimize the signal transmission according to the CSI so that it can better match the channel state. For example, a channel quality indicator (CQI) can be used to select an appropriate modulation and coding scheme (MCS) for link adaptation; a precoding matrix indicator (PMI) can be used to Implement eigen beamforming to maximize the strength of the received signal, or to suppress interference (such as inter-cell interference, multi-user interference, etc.).

In high-speed scenarios, due to the fast channel change rate, conventional CSI feedback cannot keep up with channel changes. Before the new CSI feedback, the channel has already changed significantly, and the base station needs to predict the channel for a subsequent period of time based on the existing CSI. State, so the base station also needs the change of the channel over time, that is, the information in the Doppler domain.

Generally, the channel can be divided into space domain, frequency domain and Doppler domain, however, the current codebook does not consider the problem of Doppler domain.

Contents of the invention

Embodiments of the present application provide a channel information reporting method, device, network-side device, terminal, and medium, capable of providing the network-side device with channel Doppler domain information.

In a first aspect, a method for reporting channel information is provided, including: a network side device sends a tracking reference signal (Tracking reference signal, TRS) to a terminal; the network side device receives Doppler parameters from the terminal; the network side device performing channel prediction based on the Doppler parameter; wherein the Doppler parameter is determined by the terminal based on the TRS.

In a second aspect, an apparatus for reporting channel information is provided, including: a sending module, configured to send a TRS to a terminal; a receiving module, configured to receive Doppler parameters from the terminal; a predicting module, configured to receive the TRS based on the receiving module Perform channel prediction on the Doppler parameters; wherein, the Doppler parameters are determined by the terminal based on the TRS.

In a third aspect, a method for reporting channel information is provided, including: a terminal receives a TRS from a network-side device; the terminal determines a Doppler parameter based on the TRS; and the terminal sends the Doppler parameter to the network-side device. A Doppler parameter; wherein, the Doppler parameter is used by the network side device to perform channel prediction.

In a fourth aspect, there is provided an apparatus for reporting channel information, including: a receiving module, configured to receive a TRS from a network side device; a determining module, configured to determine a Doppler parameter based on the TRS received by the receiving module; A module, configured to send the Doppler parameters to the network side device; wherein the Doppler parameters are used by the network side device to perform channel prediction.

In a fifth aspect, a network-side device is provided, the network-side device includes a processor and a memory, the memory stores programs or instructions that can run on the processor, and the programs or instructions are executed by the processor When realizing the steps of the method as described in the first aspect.

In a sixth aspect, a network side device is provided, including a processor and a communication interface, wherein the communication interface is used to send a tracking reference signal TRS, and receive Doppler parameters from a terminal; the processor is used to Doppler parameters for channel prediction; wherein, the Doppler parameters are determined by the terminal based on the TRS.

In a seventh aspect, there is provided a terminal, the terminal includes a processor and a memory, the memory stores programs or instructions that can run on the processor, and when the programs or instructions are executed by the processor, the following steps are implemented: The steps of the method in one aspect.

In an eighth aspect, a terminal is provided, including a processor and a communication interface, wherein the communication interface is used to receive a TRS from a network side device; the processor is used for the terminal to determine a Doppler parameter based on the TRS ; The communication interface is also used to send the Doppler parameters to the network side device; wherein, the Doppler parameters are used by the network side device to perform channel prediction.

A ninth aspect provides a communication system, including: a terminal and a network-side device, the network-side device can be used to perform the steps of the method described in the first aspect, and the terminal can be used to perform the steps of the method described in the third aspect. steps of the method described above.

In a tenth aspect, a readable storage medium is provided, and a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method as described in the first aspect are implemented, or the The steps of the method described in the third aspect.

In an eleventh aspect, a chip is provided, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or an instruction to implement the method described in the first aspect. method, or implement the method as described in the second aspect.

A twelfth aspect provides a computer program/program product, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the The steps of the method described in the three aspects.

In this embodiment of the present application, the network-side device sends a TRS to the terminal, so that the terminal can determine the Doppler parameter based on the TRS, and reports the Doppler parameter to the network-side device, so that the network-side device can The Puller parameter predicts the subsequent channel, so as to know the channel change of the subsequent symbol, and improve the communication energy efficiency of the system.

Description of drawings

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

FIG. 2 is one of the schematic flowcharts of a method for reporting channel information provided in an embodiment of the present application;

FIG. 3 is the second schematic flow diagram of a method for reporting channel information provided by an embodiment of the present application;

FIG. 4 is the third schematic flow diagram of a method for reporting channel information provided by an embodiment of the present application;

FIG. 5 is one of the structural schematic diagrams of a device for reporting channel information provided in an embodiment of the present application;

FIG. 6 is the second structural schematic diagram of a device for reporting channel information provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of a hardware structure of a communication device provided in an embodiment of the present application;

FIG. 8 is a schematic diagram of a hardware structure of a UE provided in an embodiment of the present application;

FIG. 9 is a schematic diagram of a hardware structure of a network side device provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in this application belong to the protection scope of this application.

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein and that "first" and "second" distinguish objects. It is usually one category, and the number of objects is not limited. For example, there may be one or more first objects. In addition, "and/or" in the description and claims means at least one of the connected objects, and the character "/" generally means that the related objects are an "or" relationship.

It is worth noting that the technology described in the embodiment of this application is not limited to the Long Term Evolution (Long Term Evolution, LTE)/LTE-Advanced (LTE-Advanced, LTE-A) system, and can also be used in other wireless communication systems, such as code Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency Division Multiple Access (Single-carrier Frequency Division Multiple Access, SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned system and radio technology, and can also be used for other systems and radio technologies. The following description describes the New Radio (New Radio, NR) system for example purposes, and uses NR terminology in most of the following descriptions, but these techniques can also be applied to applications other than NR system applications, such as the 6th generation (6th Generation , 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which the embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network side device 12 . Wherein, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, a super mobile personal computer (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) equipment, robot, wearable device (Wearable Device) , vehicle equipment (VUE), pedestrian terminal (PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (personal computers, PCs), teller machines or self-service Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), Smart wristbands, smart clothing, etc. It should be noted that, the embodiment of the present application does not limit the specific type of the terminal 11 . The network side device 12 may include an access network device or a core network device, where the access network device 12 may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function, or Wireless access network unit. The access network device 12 may include a base station, a WLAN access point, or a WiFi node, etc., and the base station may be called a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, radio transceiver, basic Service Set (Basic Service Set, BSS), Extended Service Set (Extended Service Set, ESS), Home Node B, Home Evolved Node B, Transmitting Receiving Point (Transmitting Receiving Point, TRP) or any other suitable in the field As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in this embodiment of the application, only the base station in the NR system is used as an example, and the specific type of the base station is not limited.

Usually, the base station sends CSI-RS on certain time-frequency resources of a certain slot (time slot), and the terminal performs channel estimation according to the CSI Reference Signal (CSI Reference Signal, CSI-RS), calculates the channel information on this slot, and passes The codebook feeds back the PMI to the base station, and the base station combines the channel information based on the codebook information fed back by the terminal. Before the next CSI is reported, the base station uses this to perform data precoding and multi-user scheduling.

In order to further reduce the CSI feedback overhead, the terminal can change the PMI reported by each sub-band to report the PMI according to the delay. Since the channel in the delay domain is more concentrated, the PMI of all sub-bands can be approximately expressed with less delay PMI, that is, the delay domain The information will be reported after compression.

Similarly, in order to reduce overhead, the base station can precode the CSI-RS in advance and send the coded CSI-RS to a terminal. The terminal sees the channel corresponding to the coded CSI-RS, and the terminal only needs to be on the network side Select several ports with higher strength from the indicated ports, and report the coefficients corresponding to these ports.

Usually, the information used by the network side for CSI-RS precoding is angle information and delay information, and the network side can obtain these information through the uplink SRS, or obtain these information through the previously reported PMI. In addition to angle information and delay information, the channel information at a certain moment is phase information, which changes rapidly. The base station cannot obtain it through other methods and needs to be reported by the terminal. Therefore, the terminal only needs to report the phase information, so that Reduced CSI overhead and processing complexity.

Under the R16 codebook structure, the network side equipment sends CSI-RS, the terminal receives and selects 2L spatial domain orthogonal bases, and M delays (delays), corresponding to the frequency domain orthogonal bases, and the terminal reports the selected orthogonal bases and the corresponding coefficients, so that the network side equipment can restore the channel according to the orthogonal basis and the corresponding coefficients.

Under the R17 codebook structure, the network side device will perform air-frequency domain joint precoding on the CSI-RS, send N CSI-RS ports, and the terminal selects the appropriate one or more CSI-RS ports and reports the corresponding coefficients .

Generally, channels can be divided into air domain (angle domain), frequency domain (delay domain), and Doppler domain (time domain). The existing codebooks are whether the R16 terminal reports the air domain and frequency domain, or the R17 base station reports the air domain And frequency domain precoding into CSI-RS, neither considers the problem of Doppler domain.

In the channel information reporting method, device, network-side equipment, terminal, and medium provided in the embodiments of the present application, the network-side equipment sends a TRS to the terminal, so that the terminal can determine the Doppler parameter based on the TRS, and the Doppler ginseng The number is reported to the network side device, so that the network side device can predict the subsequent channel based on the Doppler parameter, so as to know the channel change of the subsequent symbol, and improve the communication energy efficiency of the system.

The channel information reporting method, device, network side equipment, terminal and medium provided by the embodiments of the present application will be described in detail below through some embodiments and application scenarios with reference to the accompanying drawings.

The embodiment of the present application provides a method for reporting channel information. As shown in FIG. 2 , the method for reporting channel information provided in the embodiment of the present application includes the following steps 201 to 204:

Step 201: The network side device sends a TRS to the terminal.

Step 202: the terminal receives a TRS from the network side device.

Step 203: The terminal determines Doppler parameters based on the TRS.

Step 204: the terminal sends Doppler parameters to the network side device.

Step 205: the network side device receives Doppler parameters from the terminal.

Step 206: The network side device performs channel prediction based on the Doppler parameter.

In the embodiment of the present application, the foregoing Doppler parameters are determined by the terminal based on the TRS.

In the embodiment of the present application, the foregoing Doppler parameters are used for channel prediction by the network side equipment.

Optionally, in this embodiment of the present application, the foregoing Doppler parameters include: a Doppler coefficient corresponding to a space-frequency orthogonal basis.

Optionally, in this embodiment of the present application, the foregoing Doppler coefficient represents a characteristic of a channel changing with time.

Exemplarily, the above-mentioned Doppler parameters include at least one of the following: Doppler frequency shift value, Doppler spectrum, strongest Doppler path position, strongest Doppler path deviation, Doppler path position, multiple Puller coefficient, time-domain correlation.

In other words, the above-mentioned Doppler parameters include at least one characteristic index used to represent channel changes over time, such as Doppler frequency shift value, Doppler spectrum, strongest Doppler path position, strongest Doppler path deviation, Doppler path position, Doppler coefficient, time domain correlation and other characteristic indicators.

Optionally, in this embodiment of the present application, intervals between symbols of the foregoing TRS are equal; or, intervals between symbols of the foregoing TRS are different.

In some possible embodiments, TRS symbols may be equally spaced. For example, assuming that a TRS includes 4 symbols and occupies two slots (0-13, 0-13), the base station configures the TRS to ensure that the spacing between the four symbols is the same, such as, 0, 7, 0, 7 or, 6, 13, 6, 13, at this time, the normal discrete Fourier transform (Discrete Fourier Transform, DFT) vector is used.

In some possible embodiments, the TRS symbol intervals may be different, and the length of the selected Doppler orthogonal basis is not less than the maximum delay interval. It should be noted that the Doppler quadrature is essentially a DFT vector.

In an example, the length of the Doppler base may be the total number of symbols of the slot occupied by the TRS, or the total number of symbols from the first symbol to the last symbol occupied by the TRS, or the first slot occupied by the TRS The total number of symbols from the first symbol of the slot to the last symbol occupied by the TRS, or a specific value configured by the network side device.

In an example, the position of the starting symbol for the Doppler orthogonal basis may be the first symbol of the first slot occupied by the TRS, or the first symbol occupied by the TRS. For example, assuming that a TRS includes 4 symbols (eg, 0, 7, 6, 13, or, 0, 3, 1, 6), the DFT vector at this time needs to match the symbol interval, such as using 28-point or 20-point The phase values of these four positions corresponding to the DFT, if oversampled, are oversampled for the 28-point DFT.

In one example, the TRS configuration can be a symbol in a TRS, or a set of TRS symbols. For example, 4 TRSs are configured, and each TRS has 4 symbols, occupying 2 slots in total, a total of 16 When the DFT transformation is performed on the symbols, it is necessary to determine the phase of the corresponding DFT sampling point according to the difference between the time domain positions of the 16 symbols. answer Note that the symbol of the TRS occupies 8 slots or 4 slots depending on the pattern position of the TRS.

Optionally, in this embodiment of the present application, the foregoing TRS is a precoded TRS.

In some possible embodiments, the above TRS may be any of the following:

TRS obtained after precoding using space-frequency domain precoding;

TRS obtained after precoding using spatial precoding.

In some possible embodiments, before the above step 201, the channel information reporting method provided in the embodiment of the present application may further include the following step A1:

Step A1: The network side device precodes the TRS.

Further, in combination with the above step A1, the above step 201 may include the following step A2:

Step A2: The network side device sends the precoded TRS.

Exemplarily, the process of "the network side device precoding the TRS" in the above step A1 can be implemented by any of the following methods:

The network-side device uses air-frequency domain precoding to precode the TRS;

The network side device precodes the TRS by using airspace precoding.

Exemplarily, the network side device may determine the airspace precoding based on the degree of delay information reported by the terminal, and use all or part of the airspace precoding to precode the TRS.

Optionally, in this embodiment of the present application, in a case where the network side device uses space-frequency domain precoding to precode the TRS, the space-frequency domain precoding is related to the CSI.

In some possible embodiments, the above CSI includes at least one of the following:

The air-frequency domain precoding of the CSI-RS corresponding to the port reported by the terminal;

The location of the delay path fed back by the terminal.

In some possible embodiments, the above CSI may be the CSI previously reported by the terminal; or, the above CSI may be the CSI matching the CSI-RS corresponding to the above TRS. It should be noted that the CSI-RS corresponding to the above TRS can be regarded as the CSI-RS used by the terminal to determine the Doppler parameters (eg, the CSI-RS mentioned in the following steps B1 and B2).

In some possible embodiments, the above CSI is acquired by the network side device based on the uplink SRS by using channel mutuality.

In some possible embodiments, the space-frequency domain precoding used by the network side device for precoding the TRS may be related to the space-frequency domain precoding of the CSI-RS sent by the network side device, or may be related to the CSI-RS precoding. - CSI correlation of RS.

In some possible embodiments, the above space-frequency domain precoding satisfies at least one of the following:

The space-frequency domain precoding is the same space-frequency domain precoding as the CSI-RS;

The air-frequency domain precoding is part or all of the air-frequency domain precoding of the CSI-RS corresponding to the port reported by the terminal;

The space-frequency domain precoding is determined based on part or all of the space-frequency domain precoding of the CSI-RS corresponding to the port reported by the terminal, and the position of the delay path fed back by the terminal;

The airspace-frequency domain precoding is determined based on part or all of the airspace precoding corresponding to the port reported by the terminal, and the position of the delay path fed back by the terminal;

The air-frequency domain precoding is determined based on angle delay information reported by the terminal.

Optionally, in this embodiment of the application, during the process of determining the Doppler parameters, the terminal may use at least three methods formula to calculate. Way 1: The terminal directly determines the Doppler parameter based on the TRS sent by the network side device. Way 2: The terminal determines the Doppler parameter based on the TRS and the CSI-RS sent by the network side device. Mode 3: The terminal determines the Doppler parameter based on the TRS and the delay position indication information sent by the network side device.

For method 2 above:

In a possible embodiment, referring to FIG. 2, as shown in FIG. 3, before the above step 205, the method for reporting channel information provided by the embodiment of the present application may further include the following steps B1 and B2:

Step B1: the network side device sends the CSI-RS to the terminal.

Step B2: The terminal receives the CSI-RS from the network side device.

Further, based on the above step B1 and step B2, the above step 203 may include the following step B3:

Step B3: The terminal determines Doppler parameters based on the above TRS and CSI-RS.

In other words, the Doppler parameter in this embodiment is determined by the terminal based on the TRS and CSI-RS sent by the network side device.

In some possible examples, the above-mentioned Doppler parameters satisfy at least one of the following:

In the case where the CSI-RS is a CSI-RS that has undergone spatial-frequency domain precoding, the above-mentioned Doppler parameters include the port number selected by the terminal;

In the case where the CSI-RS is a CSI-RS that has undergone spatial precoding, the above-mentioned Doppler parameters include the port number and the position of the delay path selected by the terminal;

In the case that the CSI-RS is a CSI-RS that has not been precoded, the above-mentioned Doppler parameters include the information of the beam selected by the terminal and the location of the delay path.

In some possible embodiments, the network-side device sends a CSI-RS to the terminal, and the terminal feeds back corresponding CSI to the network-side device. Then, the network-side device sends a TRS to the terminal. After receiving the TRS, the terminal can calculate based on the CSI The content (time domain information in the delay domain) and the result of TRS calculation channel estimation (channel matrix of multiple time domain sampling points), calculate the time domain information of the channel, and report the Doppler used to represent the corresponding time domain information parameter, and the network side device predicts the subsequent channel according to the reported Doppler parameter.

In some possible embodiments, the foregoing TRS may be a precoded TRS, and the precoding may be determined through information in the air domain and frequency domain provided by the CSI.

In some possible embodiments, the above TRS and CSI-RS may be coded using the same precoding, and the precoding may be determined according to historical information.

For method 3 above:

In a possible embodiment, referring to FIG. 2, as shown in FIG. 4, in the case where the above TRS is precoded by spatial precoding to obtain the TRS, the channel information reporting method provided in the embodiment of the present application may also include Steps C1 and C2 are as follows:

Step C1: The network side device sends delay location indication information to the terminal.

Step C2: The terminal receives delay location indication information from the network side device.

Further, in combination with the above step C1 and step C2, the above step 203 may include the following step C3:

Step C3: The terminal determines Doppler parameters based on the above TRS and the above delay location indication information.

In other words, the Doppler parameter in this embodiment is determined by the terminal based on the TRS and delay location indication information sent by the network side device.

Exemplarily, after receiving the TRS and delay location indication information sent by the network side equipment, the terminal can determine the empty Frequency orthogonal basis, and then calculate the Doppler parameters corresponding to each space-frequency orthogonal basis.

In some possible examples, the above delay location indication information is used to indicate at least one of the following:

Target time delay position;

The delay difference between other delay paths other than the strongest delay path and the strongest delay path;

Delay difference between other delay paths except the strongest delay path and the previous delay path of the other delay paths.

Exemplarily, the above delay location indication information is used to indicate the delay difference between other delay paths except the strongest delay path and the strongest delay path, and the strongest delay path does not indicate.

Exemplarily, the above delay location indication information is used to indicate the delay difference between other delay paths except the strongest delay path and the previous delay path of the other delay path, the strongest delay path The path is not indicated.

In some possible examples, the delay position indication information is used to indicate a time window; the delay within the time window is the target delay position.

Exemplarily, the starting position of the time window is configured by the network side device, or the starting position of the time window is agreed to be 0 (that is, the position of the strongest path).

Exemplarily, the length of the time window is indicated by the DCI sent by the network side device, or the length of the time window is configured by RRC or MAC CE. It should be noted that the configured value is within the agreed range of the protocol.

In some possible embodiments, in the case that the above TRS is precoded through space-frequency domain precoding, the terminal calculates time domain information (ie, Doppler parameters) for each TRS. For example, assuming that a TRS includes 4 symbols, the terminal performs channel estimation on each symbol to obtain the channel corresponding to each symbol in the 4 symbols, and then performs DFT transformation on the channel of the 4 symbols to obtain 4 Doppler Le Domain's channel. Since the DFT transform can be a DFT transform or an oversampled DFT transform, the terminal will report the position of the strongest Doppler path (that is, the position of the Doppler domain channel with the largest second-order moment); The location and number of reported paths are configured by the network-side device or agreed upon by the protocol.

Exemplarily, the DFT transform without oversampling may be a 4-point DFT transform, which has the same number of symbols in the time domain, and the terminal will report the position of the Doppler path.

Exemplarily, the DFT transformation of oversampling can be considered as 4*O3 point DFT transformation (wherein, O3 is the oversampling multiple), and the terminal will report the position of the Doppler path and the corresponding oversampling identification (such as, 0 to O3- 1).

In some possible embodiments, in the case where the above TRS is precoded by spatial precoding, the terminal calculates the time delay for each delay path in the received TRS and the delay position indicated by the network side Domain information (it should be noted that several delay paths need to be calculated several times), where the delay position indicated by the network side device can also be the delay position obtained by the terminal itself during the CSI calculation process. After the calculation is completed Report all or part of the content, and the specific number of reports is configured by the network side device.

It should be noted that in the above two embodiments, the oversampled DFT transform can be used. For example, N4-point DFT matrix, O3 times oversampling, correspondingly, when reporting, the Doppler position includes the position in N4 and the position in O3; where, N4 is the number of sampling points in the time domain (such as the number of symbols in the TRS) .

In some possible embodiments, when the network side device performs channel prediction based on the Doppler parameters sent by the terminal, it may perform channel prediction by adjusting the DFT oversampling factor. For example, the network side device uses a larger oversampling multiple to calculate the phase deviation of the corresponding angle delay to the DFT sampling point corresponding to a certain symbol.

In some possible embodiments, when the network side device performs channel prediction based on the Doppler parameters sent by the terminal, it may use the Doppler parameters fed back by the terminal (such as Doppler frequency shift and corresponding angle delay path) , to calculate a specific symbol At the moment of , the phase deviation of the angular delay path is superimposed on all the angular delay paths to obtain the angular delay path at the corresponding moment.

It should be noted that the CSI-RS in this application is used for channel measurement of a single time domain sampling point.

It should be noted that whether the TRS is precoded can indicate whether the angle delay information is indicated by the network side device or calculated by the terminal. The precoded TRS is used for Doppler parameter measurement, and precoded means that the network side device instructs the terminal to report the angular delay path of the Doppler parameter.

It should be noted that multiple Doppler measurements may be configured for one channel measurement.

It should be noted that one Doppler measurement can measure Doppler parameters of multiple angular delay paths, which can be different each time, and are usually configured by the network side device.

It should be noted that the measurement of Doppler parameters corresponding to one angle delay information corresponds to a set of precoded TRS. In one example, a set of precoded TRSs can be configured with multiple TRSs. Exemplarily, the precoders of each TRS are the same, but the time domain positions are different. In another example, there is only one TRS, and multiple symbol positions may be occupied by the TRS.

It should be noted that, in one Doppler measurement, N angular delay paths correspond to N groups of precoded TRS, which are orthogonal to each other (time-frequency resource orthogonality, CDM orthogonality).

Exemplarily, the above N groups of precoded TRSs have the same bandwidth or frequency domain density or frequency domain position.

Exemplarily, the bandwidth or frequency domain density or frequency domain position of the precoded TRS is the same as that of the CSI-RS.

It should be noted that, when calculating the Doppler frequency shift, the terminal may directly calculate the Doppler frequency shift according to the TRS without the need of DFT transformation. For example, the terminal can jointly calculate the Doppler frequency shift according to the symbols of all configured TRSs.

In the channel information reporting method provided by the embodiment of the present application, the network side device sends a TRS to the terminal, so that the terminal can determine the Doppler parameter based on the TRS, and reports the Doppler parameter to the network side device, so that the network The side device can predict the subsequent channel based on the Doppler parameter, so as to know the channel change of the subsequent symbol, and improve the communication energy efficiency of the system.

In the method for reporting channel information provided in the embodiment of the present application, the executing subject may be a device for reporting channel information. In the embodiment of the present application, the method for reporting channel information performed by the channel information reporting device is taken as an example to illustrate the channel information reporting device provided in the embodiment of the present application.

An embodiment of the present application provides a channel information reporting device. As shown in FIG. 5 , the channel information reporting device 400 includes a sending module 401, a receiving module 402, and a processing module 403, wherein:

The sending module 401 sends a tracking reference signal TRS to the terminal; the receiving module 402 receives Doppler parameters from the terminal; the processing module 403 performs channel prediction based on the Doppler parameters; wherein the Doppler parameters are determined by the terminal based on the TRS.

In some possible embodiments, the sending module 401 is further configured to send a channel state information reference signal CSI-RS to the terminal; wherein, the Doppler parameter is determined by the terminal based on the TRS and the CSI-RS .

In some possible embodiments, the Doppler parameter satisfies at least one of the following:

In the case where the CSI-RS is a CSI-RS that has undergone spatial-frequency domain precoding, the Doppler parameter includes a port number selected by the terminal;

In the case where the CSI-RS is a CSI-RS that has undergone spatial precoding, the Doppler parameters include the port number and the position of the delay path selected by the terminal;

In the case that the CSI-RS is a CSI-RS that has not been precoded; the Doppler parameter includes beam information selected by the terminal and a location of a delay path.

In some possible embodiments, the Doppler parameter includes: a Doppler coefficient corresponding to a space-frequency orthogonal base; wherein, the Doppler coefficient is used to represent the characteristics of the channel changing with time; the Doppler Le parameters include at least one of the following: Doppler frequency shift value, Doppler spectrum, strongest Doppler path position, strongest Doppler path deviation, Doppler path position, Doppler coefficient, time domain correlation sex.

In some possible embodiments, the processing module 403 is further configured to precode the TRS; the sending module 401 is specifically configured to send the TRS precoded by the processing module 403 .

In some possible embodiments, the processing module 403 is specifically configured to perform any of the following when precoding the TRS:

Precoding the TRS using space-frequency domain precoding;

The TRS is precoded using spatial precoding.

In some possible embodiments, when the network side device uses air-frequency domain precoding to precode the TRS, the air-frequency domain precoding is related to CSI;

Wherein, the CSI includes at least one of the following:

The space-frequency domain precoding of the CSI-RS corresponding to the port reported by the terminal;

The location of the delay path fed back by the terminal.

In some possible embodiments, the CSI is the CSI reported historically by the terminal; or, the CSI is the CSI matching the CSI-RS corresponding to the TRS.

In some possible embodiments, the CSI is obtained by the network-side device based on uplink SRS by using channel mutuality.

In some possible embodiments, the space-frequency domain precoding satisfies at least one of the following:

The air domain-frequency domain precoding is determined based on part or all of the air domain precoding corresponding to the port reported by the terminal, and the position of the delay path fed back by the terminal;

The air-frequency domain precoding is determined based on the angular delay information reported by the terminal.

In some possible embodiments, the sending module 401 is further configured to send delay location indication information when the processing module 403 uses spatial precoding to precode the TRS; wherein, the Doppler parameter is the The terminal determines based on the TRS and the delay position indication information.

In some possible embodiments, the delay location indication information is used to indicate at least one of the following:

Target time delay position;

The delay difference between other delay paths except the strongest delay path and the strongest delay path;

The delay difference between other delay paths except the strongest delay path and the previous delay path of the other delay paths.

In some possible embodiments, the delay position indication information is used to indicate a time window; the delay within the time window is the target delay position.

In some possible embodiments, the intervals between the TRS symbols are equal; or, the intervals between the TRS symbols are different.

In the channel information reporting device provided in the embodiment of the present application, the device sends a TRS to the terminal, so that the terminal can determine the Doppler parameter based on the TRS, and report the Doppler parameter to the network side device, so that the device Subsequent channels can be predicted based on the Doppler parameters, so that channel changes of subsequent symbols can be known, and communication energy efficiency of the system is improved.

The present application provides a device for reporting channel information. As shown in FIG. 6 , the device for reporting channel information includes: a receiving module 501, a processing module 502, and a sending module 503, wherein:

The receiving module 501 is configured to receive the TRS from the network side device; the processing module 502 is configured to determine Doppler parameters based on the TRS received by the receiving module 501; the sending module 503 is configured to send the TRS to the network side device The Doppler parameter; wherein the Doppler parameter is used by the network side device to perform channel prediction.

In some possible embodiments, the receiving module 501 is further configured to receive a CSI-RS from the network side device; the processing module 502 is specifically configured to, based on the TRS and the CSI-RS received by the receiving module 501, Determine the Doppler parameters.

In some possible embodiments, the Doppler parameters include: a Doppler coefficient corresponding to a space-frequency orthogonal basis;

Wherein, the Doppler coefficient represents the characteristic of the channel changing with time;

The Doppler parameters include at least one of the following:

Doppler frequency shift value, Doppler spectrum, strongest Doppler path position, strongest Doppler path deviation, Doppler path position, Doppler coefficient, time domain correlation.

In some possible embodiments, the TRS is a precoded TRS.

In some possible embodiments, the TRS is any of the following:

TRS obtained after precoding using space-frequency domain precoding;

TRS obtained after precoding using spatial precoding.

In some possible embodiments, the receiving module 501 is further configured to receive delay location indication information from the network side device when the TRS is precoded through airspace precoding and obtains the TRS; the processing module 502 Specifically, it is used to determine Doppler parameters based on the TRS received by the receiving module 501 and the delay location indication information.

Target time delay position;

In the channel information reporting device provided in the embodiment of the present application, the device receives the TRS sent by the network side equipment, Make it possible to determine the Doppler parameter based on TRS, and report the Doppler parameter to the network side device, so that the network side device can predict the subsequent channel based on the Doppler parameter, so as to know the channel change of the subsequent symbol The situation improves the communication energy efficiency of the system.

The channel information reporting apparatus in this embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component of the electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or other devices other than the terminal. Exemplarily, the terminal may include, but not limited to, the types of terminal 11 listed above, and other devices may be servers, Network Attached Storage (NAS), etc., which are not specifically limited in this embodiment of the present application.

The channel information reporting device provided by the embodiment of the present application can implement the various processes implemented by the method embodiments described above, and achieve the same technical effect. To avoid repetition, details are not repeated here.

Optionally, as shown in FIG. 7 , the embodiment of the present application further provides a communication device 600, including a processor 601, a memory 602, and programs or instructions stored in the memory 602 and operable on the processor 601, For example, when the communication device 600 is a terminal, when the program or instruction is executed by the processor 601, each process performed by the terminal in the above embodiment of the channel information reporting method can be realized, and the same technical effect can be achieved. When the communication device 600 is a network-side device, when the program or instruction is executed by the processor 601, the various processes performed by the network-side device in the above-mentioned channel information reporting method embodiment can be achieved, and the same technical effect can be achieved. To avoid repetition, here No longer.

The embodiment of the present application also provides a terminal, including a processor and a communication interface, the communication interface is used to receive the TRS from the network side equipment; the processor is used to determine the Doppler parameter based on the TRS; the communication interface is also used to send the TRS to the network The side device sends the Doppler parameter; wherein the Doppler parameter is used by the network side device to perform channel prediction. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment, and each implementation process and implementation mode of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect. Specifically, FIG. 8 is a schematic diagram of a hardware structure of a terminal implementing an embodiment of the present application.

The terminal 100 includes but not limited to: a radio frequency unit 101, a network module 102, an audio output unit 103, an input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109 and a processor 110, etc. At least some parts.

Those skilled in the art can understand that the terminal 100 can also include a power supply (such as a battery) for supplying power to various components, and the power supply can be logically connected to the processor 110 through the power management system, so that the management of charging, discharging, and functions can be realized through the power management system. Consumption management and other functions. The terminal structure shown in FIG. 8 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or combine some components, or arrange different components, which will not be repeated here.

It should be understood that, in the embodiment of the present application, the input unit 104 may include a graphics processing unit (Graphics Processing Unit, GPU) 1041 and a microphone 1042, and the graphics processor 1041 is used in a video capture mode or an image capture mode by an image capture device ( Such as the image data of the still picture or video obtained by the camera) for processing. The display unit 106 may include a display panel 1061, and the display panel 1061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 107 includes at least one of a touch panel 1071 and other input devices 1072 . The touch panel 1071 is also called a touch screen. The touch panel 1071 may include two parts, a touch detection device and a touch controller. Other input devices 1072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be repeated here.

In the embodiment of this application, after the radio frequency unit 101 receives the downlink data from the network side equipment, it can transmit it to the processing The device 110 performs processing; in addition, the radio frequency unit 101 can send uplink data to the network side device. Generally, the radio frequency unit 101 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 109 can be used to store software programs or instructions as well as various data. The memory 109 can mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area can store an operating system, an application program or instructions required by at least one function (such as a sound playing function, image playback function, etc.), etc. Furthermore, memory 109 may include volatile memory or nonvolatile memory, or, memory 109 may include both volatile and nonvolatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synch link DRAM , SLDRAM) and Direct Memory Bus Random Access Memory (Direct Rambus RAM, DRRAM). The memory 109 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

The processor 110 may include one or more processing units; optionally, the processor 110 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the foregoing modem processor may not be integrated into the processor 110 .

Wherein, the radio frequency unit 101 is used to receive the TRS from the network side device; the processor 110 is used to determine the Doppler parameter based on the TRS received by the radio frequency unit 101; the radio frequency unit 101 is used to send the TRS to the network side device Sending the Doppler parameters; where the Doppler parameters are used by the network side device to perform channel prediction.

In some possible embodiments, the radio frequency unit 101 is further configured to receive a CSI-RS from the network side device; the processor 110 is specifically configured to, based on the TRS and the CSI-RS received by the radio frequency unit 101, Determine the Doppler parameters.

The Doppler parameters include at least one of the following:

In some possible embodiments, the TRS is a precoded TRS.

In some possible embodiments, the TRS is any of the following:

TRS obtained after precoding using space-frequency domain precoding;

TRS obtained after precoding using spatial precoding.

In some possible embodiments, the radio frequency unit 101 is further configured to receive delay position indication information from the network side device when the TRS is precoded by airspace precoding and obtains the TRS; the processor 110 is specifically configured to determine Doppler parameters based on the TRS received by the radio frequency unit 101 and the delay location indication information.

Target time delay position;

In the terminal provided in the embodiment of the present application, the terminal receives the TRS sent by the network side device, so that it can determine the Doppler parameter based on the TRS, and report the Doppler parameter to the network side device, so that the network side The device can predict the subsequent channel based on the Doppler parameter, so as to know the channel change of the subsequent symbol, and improve the communication energy efficiency of the system.

The embodiment of the present application also provides a network side device, including a processor and a communication interface, the communication interface is used to send TRS to the terminal; it is also used to receive Doppler parameters from the terminal; the processor is used to Parameters to perform channel prediction; wherein, the Doppler parameters are determined by the terminal based on the TRS. The network-side device embodiment corresponds to the above-mentioned network-side device method embodiment, and each implementation process and implementation mode of the above-mentioned method embodiment can be applied to this network-side device embodiment, and can achieve the same technical effect.

Specifically, the embodiment of the present application also provides a network side device. As shown in FIG. 9 , the network side device 700 includes: an antenna 71 , a radio frequency device 72 , a baseband device 73 , a processor 74 and a memory 75 . The antenna 71 is connected to a radio frequency device 72 . In the uplink direction, the radio frequency device 72 receives information through the antenna 71, and sends the received information to the baseband device 73 for processing. In the downlink direction, the baseband device 73 processes the information to be sent and sends it to the radio frequency device 72 , and the radio frequency device 72 processes the received information and sends it out through the antenna 71 .

The method performed by the network side device in the above embodiments may be implemented in the baseband device 73, where the baseband device 73 includes a baseband processor.

The baseband device 73 can include at least one baseband board, for example, a plurality of chips are arranged on the baseband board, as shown in FIG. The program executes the network device operations shown in the above method embodiments.

The network side device may also include a network interface 76, such as a common public radio interface (common public radio interface, CPRI).

Specifically, the network side device 700 in this embodiment of the present invention also includes: instructions or programs stored in the memory 75 and operable on the processor 74, and the processor 74 calls the instructions or programs in the memory 75 to execute the various programs shown in FIG. The method of module execution achieves the same technical effect, so in order to avoid repetition, it is not repeated here.

The embodiment of the present application also provides a readable storage medium, the readable storage medium stores a program or an instruction, and when the program or instruction is executed by the processor, each process of the above-mentioned method embodiment of the channel information reporting method is implemented, and can reach To the same technical effect, in order to avoid repetition, it will not be repeated here.

Wherein, the processor is the processor in the terminal described in the foregoing embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk, and the like.

The embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the above method for reporting channel information The various processes of the embodiment can achieve the same technical effect, so in order to avoid repetition, details are not repeated here.

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

An embodiment of the present application further provides a computer program/program product, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the above method for reporting channel information Each process of the method embodiment can achieve the same technical effect, and will not be repeated here to avoid repetition.

The embodiment of the present application also provides a communication system, including: a terminal and a network side device, the terminal can be used to perform the steps performed by the terminal in the method for reporting channel information as described above, and the network side device can be used to perform the above The steps performed by the network side device in the channel information reporting method.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions are performed, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the technical solution of the present application can be embodied in the form of computer software products, which are stored in a storage medium (such as ROM/RAM, magnetic disk, etc.) , CD-ROM), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Under the inspiration of this application, without departing from the purpose of this application and the scope of protection of the claims, many forms can also be made, all of which belong to the protection of this application.

Claims

A method for reporting channel information, comprising:

The network side device sends a tracking reference signal TRS to the terminal;

The network side device receives Doppler parameters from the terminal;

The network side device performs channel prediction based on the Doppler parameter;

Wherein, the Doppler parameter is determined by the terminal based on the TRS.
The method according to claim 1, wherein, before the network side device receives the Doppler parameters from the terminal, the method further comprises:

The network side device sends a channel state information reference signal CSI-RS to the terminal;

Wherein, the Doppler parameter is determined by the terminal based on the TRS and the CSI-RS.
The method according to claim 2, wherein the Doppler parameters satisfy at least one of the following:

In the case where the CSI-RS is a CSI-RS that has undergone spatial-frequency domain precoding, the Doppler parameter includes a port number selected by the terminal;

In the case where the CSI-RS is a CSI-RS that has undergone spatial precoding, the Doppler parameters include the port number and the position of the delay path selected by the terminal;

In the case that the CSI-RS is a CSI-RS that has not been precoded; the Doppler parameter includes beam information selected by the terminal and a location of a delay path.
The method according to any one of claims 1 to 3, wherein the Doppler parameters include: a Doppler coefficient corresponding to a space-frequency orthogonal basis;

Wherein, the Doppler coefficient is used to represent the characteristics of the channel changing with time;

The Doppler parameters include at least one of the following:

Doppler frequency shift value, Doppler spectrum, strongest Doppler path position, strongest Doppler path deviation, Doppler path position, Doppler coefficient, time domain correlation.
The method according to claim 1, wherein, before the network side device sends the TRS to the terminal, the method further comprises:

The network side device precodes the TRS;

The sending of the TRS by the network side device includes:

The network side device sends the precoded TRS.
The method according to claim 5, wherein the network side device precoding the TRS includes any of the following:

The network side device precodes the TRS by using air domain-frequency domain precoding;

The network side device precodes the TRS by using airspace precoding.
The method according to claim 1, wherein, in the case where the network-side device uses space-frequency domain precoding to precode the TRS, the space-frequency domain precoding is related to CSI;

Wherein, the CSI includes at least one of the following:

The space-frequency domain precoding of the CSI-RS corresponding to the port reported by the terminal;

The location of the delay path fed back by the terminal.
The method according to claim 7, wherein the CSI is the CSI reported historically by the terminal; or, the CSI is the CSI matching the CSI-RS corresponding to the TRS.
The method according to claim 7, wherein the CSI is obtained by the network side device by using channel mutuality based on uplink SRS.
The method according to any one of claims 7 to 9, wherein the space-frequency domain precoding satisfies at least one of the following:

The space-frequency domain precoding is the same space-frequency domain precoding as the CSI-RS;

The air-frequency domain precoding is part or all of the air-frequency domain precoding of the CSI-RS corresponding to the port reported by the terminal;

The space-frequency domain precoding is determined based on part or all of the space-frequency domain precoding of the CSI-RS corresponding to the port reported by the terminal, and the position of the delay path fed back by the terminal;

The air domain-frequency domain precoding is determined based on part or all of the air domain precoding corresponding to the port reported by the terminal, and the position of the delay path fed back by the terminal;

The air-frequency domain precoding is determined based on the angular delay information reported by the terminal.
The method according to claim 5, wherein, in the case where the network side device uses airspace precoding to precode the TRS, the method further comprises:

The network side device sends delay position indication information;

Wherein, the Doppler parameter is determined by the terminal based on the TRS and the delay location indication information.
The method according to claim 11, wherein the delay location indication information is used to indicate at least one of the following:

target time delay position;

The delay difference between other delay paths except the strongest delay path and the strongest delay path;

The delay difference between other delay paths except the strongest delay path and the previous delay path of the other delay paths.
The method according to claim 7, wherein the delay position indication information is used to indicate a time window; the delay within the time window is the target delay position.
The method according to claim 1, wherein the intervals between the TRS symbols are equal; or, the intervals between the TRS symbols are different.
A method for reporting channel information, comprising:

The terminal receives the TRS from the network side device;

The terminal determines Doppler parameters based on the TRS;

The terminal sends the Doppler parameter to the network side device;

Wherein, the Doppler parameter is used by the network side device to perform channel prediction.
The method according to claim 15, wherein, before the terminal determines Doppler parameters based on the TRS, the method further comprises:

The terminal receives the CSI-RS from the network side device;

The terminal determines Doppler parameters based on the TRS, including:

The terminal determines Doppler parameters based on the TRS and the CSI-RS.
The method according to claim 16, wherein the Doppler parameter satisfies at least one of the following:

In the case where the CSI-RS is a CSI-RS that has undergone spatial-frequency domain precoding, the Doppler parameter includes a port number selected by the terminal;

In the case where the CSI-RS is a CSI-RS that has undergone spatial precoding, the Doppler parameters include the port number and the position of the delay path selected by the terminal;

In the case that the CSI-RS is a CSI-RS that has not been precoded; the Doppler parameter includes beam information selected by the terminal and a location of a delay path.
The method according to any one of claims 15 to 17, wherein the Doppler parameters include: a Doppler coefficient corresponding to a space-frequency orthogonal basis;

Wherein, the Doppler coefficient represents the characteristic of the channel changing with time;

The Doppler parameters include at least one of the following:

Doppler frequency shift value, Doppler spectrum, strongest Doppler path position, strongest Doppler path deviation, Doppler path position, Doppler coefficient, time domain correlation.
The method of claim 15, wherein the TRS is a precoded TRS.
The method according to claim 19, wherein the TRS is any of the following:

TRS obtained after precoding using space-frequency domain precoding;

TRS obtained after precoding using spatial precoding.
The method according to claim 20, wherein, in the case where the TRS is precoded by spatial precoding, the method further comprises:

The terminal receives delay location indication information from the network side device;

The terminal determines Doppler parameters based on the TRS, including:

The terminal determines Doppler parameters based on the TRS and the delay location indication information.
The method according to claim 21, wherein the delay location indication information is used to indicate at least one of the following:

target time delay position;

The delay difference between other delay paths except the strongest delay path and the strongest delay path;

The delay difference between other delay paths except the strongest delay path and the previous delay path of the other delay paths.
The method according to claim 22, wherein the delay position indication information is used to indicate a time window; the delay within the time window is the target delay position.
The method according to claim 15, wherein the intervals between the TRS symbols are equal; or, the intervals between the TRS symbols are different.
A device for reporting channel information, comprising:

A sending module, configured to send a tracking reference signal TRS to the terminal;

a receiving module, configured to receive Doppler parameters from the terminal;

A prediction module, configured to perform channel prediction based on the Doppler parameters received by the receiving module;

Wherein, the Doppler parameter is determined by the terminal based on the TRS.
A device for reporting channel information, comprising:

A receiving module, configured to receive a TRS from a network side device;

A determining module, configured to determine Doppler parameters based on the TRS received by the receiving module;

a sending module, configured to send the Doppler parameters to the network side device;

Wherein, the Doppler parameter is used by the network side device to perform channel prediction.
A terminal, including a processor and a memory, the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the process described in any one of claims 1 to 14 is implemented. Steps in the method for reporting channel information described above.
A network side device, comprising a processor and a memory, the memory stores programs or instructions that can run on the processor, and when the programs or instructions are executed by the processor, any one of claims 15 to 24 can be implemented. The steps of the channel information reporting method described in the item.
A readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the method for reporting channel information according to any one of claims 1 to 14 is realized, or the method as described in The steps of the method for reporting channel information according to any one of claims 15 to 24.