CN111510189B - Information feedback method and device - Google Patents

Abstract

The present application provides an information feedback method and device, which relate to the field of communication technologies and are used to solve the problem that the current channel state information fed back by a terminal is not suitable for a terminal in a mobile state. The method includes: the terminal generates first indication information, where the first indication information is used to indicate M time-frequency space units and weighting coefficients of the M time-frequency space units; wherein, one time-frequency space unit is based on a time-domain basis vector , a frequency domain basis vector and a spatial domain basis vector are determined. After that, the terminal sends the first indication information to the network device. This application applies to the process of channel detection.

Description

Information feedback method and device

technical field

The present application relates to the field of communication technologies, and in particular, to an information feedback method and apparatus.

Background technique

Massive multiple input multiple output (massive multiple input multiple output, Massive MIMO) technology is one of the key technologies of the fifth generation (5th generation, 5G) communication system. Massive MIMO achieves significant improvements in spectral efficiency by using massive antennas. The accuracy of channel state information (CSI) acquired by network devices largely determines the performance of Massive MIMO. In a frequency division duplex (FDD) system or a time division duplex (TDD) system where channel mutuality cannot be well satisfied, a codebook is usually used to quantify CSI. Therefore, codebook design is a key issue for Massive MIMO.

In the 3rd generation partnership project (3rd generation partnership project, 3GPP) R15 protocol, the codebook is divided into a Type I codebook and a Type II codebook. Among them, the idea of Type I codebook is beam selection, and the overhead of Type I codebook is small, but the approximation accuracy is low. The idea of Type II codebook is linear combination of beams. The approximate accuracy of Type II codebook is high, but the feedback overhead is large. The codebook that dominates the R16 protocol is the frequency-domain compression codebook. The frequency domain compression codebook utilizes the continuity of the frequency domain to compress the codebook, which can reduce the feedback overhead and improve the performance of the codebook.

Currently, based on the codebook defined by the R15 protocol or the R16 protocol, the channel state information can only represent the channel state of the terminal at one time node. If the terminal is in a mobile state, the channel of the terminal will change over time. In this way, the precoding vector (or matrix) determined by the network device according to the previous channel state information does not match the current channel state of the terminal, so that the communication between the network device and the terminal will be greatly interfered.

SUMMARY OF THE INVENTION

The present application provides an information feedback method and device, which are used to solve the problem that the current channel state information fed back by the terminal is not suitable for the terminal in a mobile state.

To achieve the above object, the application adopts the following technical solutions:

In a first aspect, an information feedback method is provided, including: a terminal generating first indication information, where the first indication information is used to indicate M time-frequency space units and weighting coefficients of the M time-frequency space units; A time domain basis vector, a frequency domain basis vector and a space domain basis vector are determined, and M is a positive integer. After that, the terminal sends the first indication information to the network device. Based on the above technical solution, since each time-frequency-space unit in the M time-frequency-space units indicated by the first indication information is determined according to a frequency-domain basis vector, a time-domain basis vector, and a space-domain basis vector, and the time-domain basis vector It can characterize the variation law of the channel in the time domain, so the time-frequency space unit can also characterize the variation law of the channel in the time domain. Therefore, the precoding matrix (or precoding vector) determined by the M time-frequency space units indicated by the first indication information and the M weighting coefficients can match the channel of the terminal that changes with time, ensuring that the network device and the terminal are connected. normal communication between.

In a possible design, the first indication information is used to indicate the indices of the M time-frequency space units in the time-frequency space unit set; or, the first indication information is used to indicate that the M time-frequency space units are in the time-frequency space unit index in the subset.

In a possible design, the first indication information is used to indicate L spatial domain basis vectors, K time domain basis vectors, and N frequency domain basis vectors; or, the first indication information is used to indicate L spatial domain basis vectors and X ₁ time-frequency units; alternatively, the first indication information is used to indicate K time-domain basis vectors and X ₂ space-frequency units; alternatively, the first indication information is used to indicate N frequency-domain basis vectors and X ₃ a space-time unit. Among them, a time-frequency unit is determined by a time-domain basis vector and a frequency-domain basis vector; a space-frequency unit is determined by a space-domain basis vector and a frequency-domain basis vector; a space-time unit is determined by a time-domain basis vector and a space-domain basis vector Vector ok. L, K, N, X ₁ , X ₂ and X ₃ are all positive integers.

In a possible design, before the terminal generates the indication information, it further includes: the terminal receives second indication information, and the second indication information is used to configure a preset channel state information feedback mode; if the terminal adopts the preset channel state information In the feedback mode, the terminal detects the reference signals of n time units, and determines the channel state information, where the channel state information includes the first indication information, and n is an integer greater than 1. In this way, the terminal can feed back channel state information based on n time units, to ensure that the precoding matrix (or precoding vector) used by the network device can match the channel that the terminal changes over time, and to ensure normal communication between the network device and the terminal. communication.

In a possible design, the second indication information is carried in the codebook indication information, and the codebook indication information is used to indicate the codebook type used by the terminal. The codebook types include a type I codebook, a type II codebook, and a time-frequency space codebook. It can be understood that, when the codebook indication information indicates that the codebook used by the terminal is a time-frequency space codebook, the codebook indication information carries the second indication information. In other words, the codebook indication information indirectly instructs the terminal to use the preset channel state information feedback mode.

In a possible design, the second indication information is also used to indicate the value of n, so that the terminal can determine the value of n, that is, the terminal can determine the number of time units for which reference signal measurement needs to be performed.

In a possible design, the method further includes: the terminal receives reference signal resource configuration information, the reference signal resource configuration information is used to configure a reference signal resource set, the reference signal resource set includes multiple reference signal resources, and the multiple reference signal resources correspond to different time units.

In a possible design, the method further includes: the terminal receives reference signal resource configuration information, where the reference signal resource configuration information is used to configure multiple reference signal resource sets, and the multiple reference signal resource sets correspond to different time units.

In a second aspect, an information feedback method is provided, including: a network device receiving first indication information, where the first indication information is used to indicate M time-frequency space units and weighting coefficients of the M time-frequency space units; one time-frequency space unit Determined according to a time domain basis vector, a frequency domain basis vector and a space domain basis vector, M is a positive integer. After that, the network device determines the M time-frequency space units and the weighting coefficients of the M time-frequency space units according to the first indication information. Based on the above technical solution, since each time-frequency-space unit in the M time-frequency-space units indicated by the first indication information is determined according to a frequency-domain basis vector, a time-domain basis vector, and a space-domain basis vector, and the time-domain basis vector It can characterize the variation law of the channel in the time domain, so the time-frequency space unit can also characterize the variation law of the channel in the time domain. Therefore, the precoding matrix (or precoding vector) determined by the M time-frequency space units indicated by the first indication information and the M weighting coefficients can match the channel of the terminal that changes with time, ensuring that the network device and the terminal are connected. normal communication between.

In a possible design, the first indication information is used to indicate the indices of the M time-frequency space units in the time-frequency space unit set; or, the first indication information is used to indicate that the M time-frequency space units are in the time-frequency space unit The index in the subset of the collection.

In a possible design, the first indication information is used to indicate L spatial domain basis vectors, K time domain basis vectors, and N frequency domain basis vectors; or, the first indication information is used to indicate L spatial domain basis vectors and X ₁ time-frequency units; alternatively, the first indication information is used to indicate K time-domain basis vectors and X ₂ space-frequency units; alternatively, the first indication information is used to indicate N frequency-domain basis vectors and X ₃ a space-time unit. Among them, a time-frequency unit is determined by a time-domain basis vector and a frequency-domain basis vector; a space-frequency unit is determined by a space-domain basis vector and a frequency-domain basis vector; a space-time unit is determined by a time-domain basis vector and a space-domain basis vector Vector ok. L, K, N, X ₁ , X ₂ and X ₃ are all positive integers.

In a possible design, the method further includes: sending second indication information, where the second indication information is used to configure a preset channel state information feedback mode; the preset channel state information feedback mode is used to instruct the terminal to detect n times The reference signal of the unit determines the channel state information; the channel state information includes the first indication information, and n is an integer greater than 1.

In a possible design, the second indication information is carried in the codebook indication information, and the codebook indication information is used to indicate the codebook type used by the terminal.

In a possible design, the second indication information is also used to indicate the value of n.

In a possible design, the method further includes: the network device sends reference signal resource configuration information, the reference signal resource configuration information is used to configure a reference signal resource set, and the reference signal resource set includes multiple reference signal resources, and multiple reference signal resources corresponding to different time units.

In a possible design, the method further includes: the network device sends reference signal resource configuration information, where the reference signal resource configuration information is used to configure multiple reference signal resource sets, and the multiple reference signal resource sets correspond to different time units.

In a third aspect, a terminal is provided, including: a processing module and a communication module. The processing module is used to generate first indication information, where the first indication information is used to indicate the M time-frequency space units and the weighting coefficients of the M time-frequency space units; The basis vector and an airspace basis vector are determined, and M is a positive integer. The communication module is used for sending the first indication information.

In a possible design, the first indication information is used to indicate the indices of the M time-frequency space units in the time-frequency space unit set; or, the first indication information is used to indicate that the M time-frequency space units are in the time-frequency space unit The index in the subset of the collection.

In a possible design, the first indication information is used to indicate L spatial domain basis vectors, K time domain basis vectors, and N frequency domain basis vectors; or, the first indication information is used to indicate L spatial domain basis vectors and X ₁ time-frequency units; alternatively, the first indication information is used to indicate K time-domain basis vectors and X ₂ space-frequency units; alternatively, the first indication information is used to indicate N frequency-domain basis vectors and X ₃ a space-time unit. Among them, a time-frequency unit is determined by a time-domain basis vector and a frequency-domain basis vector; a space-frequency unit is determined by a space-domain basis vector and a frequency-domain basis vector; a space-time unit is determined by a time-domain basis vector and a space-domain basis vector Vector ok. L, K, N, X ₁ , X ₂ and X ₃ are all positive integers.

In a possible design, the communication module is further configured to receive second indication information, where the second indication information is used to configure a preset channel state information feedback mode. The processing module is further configured to detect reference signals of n time units if the preset channel state information feedback mode is adopted, and determine the channel state information, where the channel state information includes the first indication information, and n is an integer greater than 1.

In a possible design, the second indication information is carried in the codebook indication information, and the codebook indication information is used to indicate the codebook type used by the terminal.

In a possible design, the second indication information is also used to indicate the value of n.

In a possible design, the communication module is further configured to receive reference signal resource configuration information, the reference signal resource configuration information is used to configure a reference signal resource set, the reference signal resource set includes multiple reference signal resources, and the multiple reference signal resources correspond to different time units.

In a possible design, the communication module is further configured to receive reference signal resource configuration information, where the reference signal resource configuration information is used to configure multiple reference signal resource sets, and the multiple reference signal resource sets correspond to different time units.

In a fourth aspect, a communication device is provided, comprising: a processor and a memory, where the processor is configured to read instructions in the memory, and implement the information feedback method as described in the first aspect above according to the instructions.

In a fifth aspect, a computer-readable storage medium is provided, and instructions are stored in the computer-readable storage medium, when the computer-readable storage medium runs on a communication device, the communication device can execute the information feedback method described in the first aspect.

In a sixth aspect, there is provided a computer program product comprising instructions which, when executed on a communication device, enable the communication device to execute the information feedback method described in the first aspect above.

In a seventh aspect, a chip is provided, the chip includes a processing module and a communication interface, the communication interface is used for receiving an input signal and providing it to the processing module, and/or for outputting a signal generated by the processing module, and the processing module is used for The information feedback method described in the first aspect above is executed. In one embodiment, the processing module may execute code instructions to execute the information feedback method described in the first aspect. The code instruction can come from a memory inside the chip or from a memory outside the chip. Optionally, the processing module may be a processor, a microprocessor or an integrated circuit integrated on the chip. The communication interface can be an input-output circuit or a transceiver pin on the chip.

Wherein, for the technical effect brought by any one of the design methods from the third aspect to the seventh aspect, please refer to the beneficial effects in the corresponding method provided above and the technical effect brought by the design method, which will not be repeated here. .

In an eighth aspect, a network device is provided, including: a communication module and a processing module. The communication module receives first indication information, where the first indication information is used to indicate the M time-frequency space units and the weighting coefficients of the M time-frequency space units; and an airspace basis vector to determine, M is a positive integer. The processing module determines the M time-frequency space units and the weighting coefficients of the M time-frequency space units according to the first indication information.

In a possible design, the first indication information is used to indicate the indices of the M time-frequency space units in the time-frequency space unit set; or, the first indication information is used to indicate that the M time-frequency space units are in the time-frequency space unit index in the subset.

In a possible design, the first indication information is used to indicate L spatial domain basis vectors, K time domain basis vectors, and N frequency domain basis vectors; or, the first indication information is used to indicate L spatial domain basis vectors and X ₁ time-frequency units; alternatively, the first indication information is used to indicate K time-domain basis vectors and X ₂ space-frequency units; alternatively, the first indication information is used to indicate N frequency-domain basis vectors and X ₃ a space-time unit. Among them, a time-frequency unit is determined by a time-domain basis vector and a frequency-domain basis vector; a space-frequency unit is determined by a space-domain basis vector and a frequency-domain basis vector; a space-time unit is determined by a time-domain basis vector and a space-domain basis vector Vector ok. L, K, N, X ₁ , X ₂ and X ₃ are all positive integers.

In a possible design, the communication module is further configured to send second indication information, and the second indication information is used to configure a preset channel state information feedback mode; the preset channel state information feedback mode is used to instruct the terminal to detect n The reference signal of the time unit determines the channel state information; the channel state information includes the first indication information, and n is an integer greater than 1.

In a possible design, the second indication information is carried in the codebook indication information, and the codebook indication information is used to indicate the codebook type used by the terminal.

In a possible design, the second indication information is also used to indicate the value of n.

In a possible design, the communication module is further configured to send reference signal resource configuration information, the reference signal resource configuration information is used to configure a reference signal resource set, the reference signal resource set includes multiple reference signal resources, and the multiple reference signal resources correspond to different time units.

In a possible design, the communication module is further configured to send reference signal resource configuration information, where the reference signal resource configuration information is used to configure multiple reference signal resource sets, and the multiple reference signal resource sets correspond to different time units.

According to a ninth aspect, a communication device is provided, comprising: a processor and a memory, where the processor is configured to read instructions in the memory, and implement the information feedback method as described in the second aspect above according to the instructions.

In a tenth aspect, a computer-readable storage medium is provided, the computer-readable storage medium has instructions stored therein, when the computer-readable storage medium runs on a communication device, the communication device can execute the information feedback method described in the second aspect.

In an eleventh aspect, there is provided a computer program product comprising instructions which, when executed on a communication device, enable the communication device to execute the information feedback method described in the second aspect above.

A twelfth aspect provides a chip, the chip includes a processing module and a communication interface, the communication interface is used for receiving an input signal and providing it to the processing module, and/or for outputting a signal generated by the processing module, the processing module uses for executing the information feedback method described in the second aspect. In one embodiment, the processing module may execute code instructions to execute the information feedback method described in the second aspect. The code instruction can come from a memory inside the chip or from a memory outside the chip. Optionally, the processing module may be a processor, a microprocessor or an integrated circuit integrated on the chip. The communication interface can be an input-output circuit or a transceiver pin on the chip.

Wherein, for the technical effect brought by any one of the design methods from the eighth aspect to the twelfth aspect, please refer to the beneficial effects in the corresponding method provided above and the technical effect brought by the design method, which is not repeated here. Repeat.

A thirteenth aspect provides a communication system including a terminal and a network device. The terminal is configured to execute the information feedback method described in the first aspect. The network device is configured to execute the information feedback method described in the second aspect.

Description of drawings

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

FIG. 2 is a schematic structural diagram of a terminal and a network device according to an embodiment of the present application;

FIG. 3 is a schematic diagram of an antenna array according to an embodiment of the present application;

FIG. 4 is a flowchart 1 of an information feedback method provided by an embodiment of the present application;

5 is a schematic diagram of a time-frequency-space unit set provided by an embodiment of the present application;

FIG. 6 is a second flowchart of an information feedback method provided by an embodiment of the present application;

FIG. 7 is a flowchart 3 of an information feedback method provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present application;

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

Detailed ways

In the description of this application, unless otherwise stated, "/" means "or", for example, A/B can mean A or B. In this article, "and/or" is only an association relationship to describe the associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone these three situations. Further, "at least one" means one or more, and "plurality" means two or more. The words "first" and "second" do not limit the quantity and execution order, and the words "first", "second" and the like do not limit certain differences.

It should be noted that, in this application, words such as "exemplary" or "for example" are used to represent examples, illustrations or illustrations. Any embodiment or design described in this application as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner.

The technical solutions provided in this application can be applied to various communication systems. The technical solutions provided in this application can be applied to 5G communication systems, future evolution systems or various communication fusion systems, etc., and can also be applied to existing communication systems and the like. The application scenarios of the technical solutions provided in this application may include various, for example, machine to machine (M2M), macro-micro communication, enhanced mobile broadband (eMBB), ultra-high reliability and ultra-low time Latency communication (ultra reliable & low latency communication, uRLLC) and massive IoT communication (massive machine type communication, mMTC) and other scenarios. These scenarios may include but are not limited to: a communication scenario between terminals, a communication scenario between a network device and a network device, a communication scenario between a network device and a terminal, and the like. The following descriptions are given by taking a scenario in which the technical solution of the present application is applied to the communication between a network device and a terminal as an example.

In addition, the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. With the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

FIG. 1 is a schematic structural diagram of a communication system to which the technical solution of the present application is applied. As shown in FIG. 1, the communication system may include one or more network devices (only one is shown) and one or more terminals connected to each network device. FIG. 1 is only a schematic diagram, and does not constitute a limitation on the applicable scenarios of the technical solutions provided in the present application.

The network device may be a base station or a base station controller for wireless communication. For example, the base station may include various types of base stations, such as a micro base station (also referred to as a small cell), a macro base station, a relay station, an access point, etc., which are not specifically limited in this embodiment of the present application. In this embodiment of the present application, the base station may be a global system for mobile communication (GSM), a base transceiver station (BTS) in code division multiple access (CDMA), a wideband code Base station (node B) in wideband code division multiple access (WCDMA), evolved base station (evolutional node B, eNB or e-NodeB) in long term evolution (LTE), Internet of Things (internet of things, IoT) or the eNB in the narrow band-internet of things (NB-IoT), the base station in the future 5G mobile communication network or the future evolved public land mobile network (PLMN), this The application examples do not impose any restrictions on this.

Terminals are used to provide voice and/or data connectivity services to users. The terminal may have different names, such as user equipment (UE), access terminal, terminal unit, terminal station, mobile station, mobile station, remote station, remote terminal, mobile device, wireless communication device, terminal agent or terminal device, etc. Optionally, the terminal 20 may be various handheld devices, vehicle-mounted devices, wearable devices, and computers with communication functions, which are not limited in this embodiment of the present application. For example, the handheld device may be a smartphone. The in-vehicle device may be an in-vehicle navigation system. The wearable device may be a smart bracelet or a virtual reality (virtual reality, VR) device. The computer may be a personal digital assistant (PDA) computer, a tablet computer, and a laptop computer.

FIG. 2 is a schematic diagram of a hardware structure of a network device and a terminal according to an embodiment of the present application.

The terminal includes at least one processor 101 and at least one transceiver 103 . Optionally, the terminal may further include an output device 104 , an input device 105 and at least one memory 102 .

The processor 101, the memory 102 and the transceiver 103 are connected by a bus. The processor 101 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more processors used to control the execution of the programs of the present application. integrated circuit. The processor 101 may also include multiple CPUs, and the processor 101 may be a single-CPU processor or a multi-CPU processor. A processor herein may refer to one or more devices, circuits, or processing cores for processing data (eg, computer program instructions).

Memory 102 may be read-only memory (ROM) or other types of static storage devices that may store static information and instructions, random access memory (RAM), or other types of information and instructions It can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM), or other optical disk storage, optical disk storage ( including compact discs, laser discs, compact discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or capable of carrying or storing desired program code in the form of instructions or data structures and capable of being stored by a computer Any other medium taken, this embodiment of the present application does not impose any limitation on this. The memory 102 may exist independently and be connected to the processor 101 through a bus. The memory 102 may also be integrated with the processor 101 . Wherein, the memory 102 is used for storing the application program code for executing the solution of the present application, and the execution is controlled by the processor 101 . The processor 101 is configured to execute the computer program codes stored in the memory 102, so as to implement the methods provided by the embodiments of the present application.

The transceiver 103 may use any transceiver-like device for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), and the like. The transceiver 103 includes a transmitter Tx and a receiver Rx.

The output device 104 communicates with the processor 101 and can display information in a variety of ways. For example, the output device 104 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait. The input device 105 is in communication with the processor 101 and can receive user input in a variety of ways. For example, the input device 105 may be a mouse, a keyboard, a touch screen device, a sensor device, or the like.

The network device includes at least one processor 201 , at least one memory 202 , at least one transceiver 203 and at least one network interface 204 . The processor 201, the memory 202, the transceiver 203 and the network interface 204 are connected by a bus. Wherein, the network interface 204 is used to connect with the core network device through a link (such as the S1 interface), or connect with the network interface of other network devices through a wired or wireless link (such as the X2 interface) (not shown in the figure), This embodiment of the present application does not specifically limit this. In addition, for the description of the processor 201, the memory 202, and the transceiver 203, reference may be made to the description of the processor 101, the memory 102, and the transceiver 103 in the terminal, and details are not repeated here.

In order to facilitate understanding of the embodiments of the present application, the following points are first described below.

First, the embodiments of the present application relate to the meanings of the main parameters:

(1) N _s : the length of the space base vector, that is, the number of elements contained in the space base vector. In this embodiment of the present application, the length of the vector may also be referred to as the dimension of the vector, which is uniformly described here, and will not be repeated below.

(2) N _f : the length of the frequency-domain basis vector, that is, the number of elements contained in the frequency-domain basis vector.

(3) N _t : the length of the time-domain basis vector, which is also the number of elements contained in the time-domain basis vector.

在三维坐标系下，F可变形为

(4) F: frequency domain basis vector. Exemplarily, in the two-dimensional coordinate system, F can be deformed as

In the three-dimensional coordinate system, F can be deformed as

在三维坐标系下，A可变形为

(5) A: Time domain basis vector. Exemplarily, in a two-dimensional coordinate system, A can be transformed into

In the three-dimensional coordinate system, A can be deformed as

在三维坐标系下，S可变形为

(6) S: spatial basis vector. Exemplarily, in the two-dimensional coordinate system, S can be deformed as

In the three-dimensional coordinate system, S can be deformed as

Second, the meaning of the operator symbol in the formula involved in the embodiment of the present application:

(1) The subscript H represents the conjugate transpose, for example, i ^H is the conjugate transpose of the vector (or matrix) u.

(2) The subscript T represents the transpose, for example, u ^T is the transpose of the vector (or matrix) u.

是向量(或者矩阵)u的共轭。(3)

is the conjugate of the vector (or matrix) u.

表示克罗内克(Kronecker)积。克罗内克积的具体定义可参考现有技术，在此不再赘述。(4)

Represents the Kronecker product. For the specific definition of the Kronecker product, reference may be made to the prior art, which will not be repeated here.

(5) Combination: From n different elements, any m (m≤n) elements are taken as a group, which is called a combination of m elements from n different elements. The number of combinations to take m elements from n different elements is

表示向上取整。(6)

Indicates rounded up.

Third, in the embodiments of the present application, any vector (such as a space-domain basis vector, a frequency-domain basis vector, a time-domain basis vector, etc.) is taken as an example for description, which is a column vector. It can be understood that, during specific implementation, any vector may also be a row vector. Those skilled in the art should be able to reasonably infer that any vector is a row vector according to the technical solutions provided in this application and without creative work, and the corresponding technical solutions will not be described herein again. Further, in the specific implementation process, the form of the vector used in this article can be adjusted according to specific needs, such as transposing the vector, or expressing the vector as the conjugate form of the vector, or the above-mentioned various methods. combination and other methods. Therefore, the above various speculations and adjustments should be understood as falling within the scope of the embodiments of the present application.

Fourth, in this embodiment, for the convenience of description, when the numbering is involved, the numbering may start from 0 consecutively. For example, the M time-frequency space units include the 0th time-frequency space unit to the M-1th time-frequency space unit, and so on, which will not be illustrated one by one here. Of course, the specific implementation is not limited to this, for example, the numbers can also be consecutively numbered from 1. It should be understood that the above descriptions are all settings for the convenience of describing the technical solutions provided by the embodiments of the present application, and are not intended to limit the scope of the present application.

Fifth, in this embodiment of the present application, "for indicating" may include direct indicating and indirect indicating. For example, when describing a certain indication information for indicating information I, the indication information may directly indicate I or indirectly indicate I, but it does not mean that the indication information must carry I.

The information indicated by the indication information is called the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated. For example, but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the information to be indicated. Indicating the index of information, etc. The information to be indicated may also be indirectly indicated by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be implemented by means of a pre-agreed (for example, a protocol stipulated) arrangement order of various information, so as to reduce the indication overhead to a certain extent. At the same time, the common part of each piece of information can also be identified and indicated uniformly, so as to reduce the indication overhead caused by indicating the same information separately. For example, those skilled in the art should understand that a precoding matrix is composed of precoding vectors, and each precoding vector in the precoding matrix may have the same parts in terms of composition or other properties.

In addition, the specific indication manner may also be various existing indication manners, such as, but not limited to, the above indication manner and various combinations thereof. For the specific details of the various indication modes, reference may be made to the prior art, and details are not described herein again. It can be seen from the above that, for example, when multiple pieces of information of the same type need to be indicated, different information may be indicated in different manners. In the specific implementation process, the required indication mode can be selected according to specific needs. The selected indication mode is not limited in this embodiment of the present application. In this way, the indication mode involved in the embodiment of the present application should be understood as covering the ability to make the indication to be indicated. Various methods for the party to learn the information to be indicated.

In addition, the information to be indicated may have other equivalent forms. For example, a row vector can be represented as a column vector, a matrix can be represented by a transposed matrix of the matrix, and a matrix can also be represented in the form of a vector or an array. The vector or array It can be formed by connecting each row vector or column vector of the matrix, and the Kronecker product of two vectors can also be expressed by the product of one vector and the transposed vector of another vector, etc. The technical solutions provided in the embodiments of the present application should be understood to cover various forms. For example, some or all of the features involved in the embodiments of the present application should be understood to cover various manifestations of the feature.

The information to be indicated may be sent together as a whole, or may be divided into multiple sub-information and sent separately, and the transmission periods and/or transmission timings of these sub-information may be the same or different. The specific sending method is not limited in this application. The sending period and/or sending timing of these sub-information may be predefined, for example, predefined according to a protocol, or configured by the transmitting end device by sending configuration information to the receiving end device. The configuration information may include, for example, but not limited to, radio resource control signaling, such as RRC signaling, MAC layer signaling, such as MAC-CE signaling, and physical layer signaling, such as downlink control information (DCI) one or a combination of at least two.

To facilitate understanding of the technical solutions of the present application, some terms involved in the embodiments of the present application are briefly introduced below.

1. Airspace basis vector

Each spatial basis vector may correspond to a transmit beam (beam) of the transmitting end device.

Spatial basis vectors are usually associated with antenna arrays. For example, many parameters involved in the expression of spatial basis vectors can be understood as being used to characterize different properties of antenna arrays. Therefore, in order to facilitate understanding of the spatial basis vectors involved in the embodiments of the present application, the spatial basis vectors will be described below with reference to the antenna array. Nevertheless, those skilled in the art should understand that the spatial basis vectors involved in the embodiments of the present application are not limited to a specific antenna array. In the specific implementation process, an appropriate antenna array may be selected according to specific needs, and based on the selected antenna array, various parameters involved in the spatial basis vectors involved in the embodiments of the present application may be set.

FIG. 3 is a schematic diagram of an antenna array 300 applicable to an embodiment of the present application. As shown in FIG. 3 , the antenna array 300 includes a plurality of vibrating element groups 302 , and these vibrating element groups 302 are arranged in a matrix manner. Specifically, each row of the matrix includes a plurality of vibrating element groups 302 , and each column includes a plurality of vibrating element groups 302 . Each vibrating element group 302 includes two vibrating elements, respectively a vibrating element 304 working in a first polarization direction and a vibrating element 306 working in a second polarizing direction.

In the specific implementation process, the airspace basis vector can be obtained by the Kronecker product of two vectors, wherein the two vectors respectively represent airspace characteristics of two dimensions of the airspace. For example, with reference to FIG. 3 , the two dimensions may be the dimension where the row and the column of the matrix formed by each vibration tuple 302 shown in FIG. 3 are located.

In this embodiment of the present application, the dimension of the spatial basis vector is N _S , that is, one spatial basis vector includes N _S elements. N _S may be the number of transmit antenna ports of the transmit end device in one polarization direction. N _s ≥ 2, N _s is an integer.

2. Frequency domain unit

The unit of frequency domain resources can represent different granularity of frequency domain resources. Exemplarily, the frequency domain unit may include, but is not limited to, a subband, a resource block (RB), a subcarrier, a resource block group (RBG), or a precoding resource block group (precoding resource block group, PRG), etc.

3. Frequency domain base vector

The frequency domain base vector is used to characterize the variation law of the channel in the frequency domain. The frequency domain basis vector can be specifically used to represent the variation law of the weighting coefficient of each spatial domain basis vector on each frequency domain unit. The variation law represented by the base vector in the frequency domain is related to factors such as multipath delay. It can be understood that, when the signal is transmitted through the wireless channel, the signal may have different transmission delays on different transmission paths. The variation law of the channel in the frequency domain caused by different transmission delays can be characterized by different frequency domain basis vectors.

In this embodiment of the present application, the dimension of the frequency domain basis vector is N _f , that is, one frequency domain basis vector includes N _f elements.

Optionally, the dimension of the frequency-domain basis vector may be equal to the number of frequency-domain units that need to perform CSI measurement. Since the number of frequency-domain units that need to perform CSI measurement at different times may be different, the dimensions of the frequency-domain basis vectors may also be different. In other words, the dimension of the frequency domain basis vectors is variable.

Optionally, the dimension of the frequency-domain basis vector may also be equal to the number of frequency-domain units included in the available bandwidth of the terminal. The available bandwidth of the terminal may be configured by the network device. The available bandwidth of the terminal is part or all of the system bandwidth. The available bandwidth of the terminal may also be called a bandwidth part (bandwidth part, BWP), which is not limited in this embodiment of the present application.

Optionally, the length of the frequency domain base vector may also be equal to the length of the signaling used to indicate the position and number of the frequency domain units to be reported. For example, in NR, the signaling used to indicate the location and number of frequency domain units to be reported may be a reporting band. The signaling may, for example, indicate the location and number of frequency domain units to be reported in the form of a bitmap. Therefore, the dimension of the frequency domain basis vector can be the number of bits of the bitmap.

4. Time unit

The time unit is composed of at least one time interval (time interval, TI) in the time domain, where the TI may be a transmission time interval (transmission time interval, TTI) in the LTE system, or a symbol-level short TTI, or a A slot, a mini-slot, or an orthogonal frequency division multiplexing (OFDM) symbol in a 5G system, etc. This embodiment of the present application does not limit this.

5. Time domain basis vector

The time domain basis vector is used to characterize the variation law of the channel in the time domain. That is, the time-domain basis vector is used to characterize the time-varying channel. The time-varying of the channel means that the transfer function of the channel changes with time. The time-varying channel is related to Doppler shift (Doppler shift) and other factors.

In this embodiment of the present application, the dimension of the time-domain basis vector is N _t , that is, a time-domain basis vector includes N _t elements.

Optionally, the dimension of the time-domain basis vector may be equal to the number of time units for which CSI measurement needs to be performed. It can be understood that, because in different scenarios, the number of time units that need to perform CSI measurement may be different, so the dimensions of the time-domain basis vectors may also be different. In other words, the dimension of the time domain basis vector is variable.

6. Time-frequency unit

A time-frequency unit is determined from a time-domain basis vector and a frequency-domain basis vector. In this embodiment of the present application, the time-frequency unit may be a time-frequency matrix or a time-frequency vector. It can be understood that the time-frequency matrix and the time-frequency vector can be converted to each other, and both can be determined by the same time-frequency base vector and the same frequency-domain base vector, so the time-frequency matrix and the time-domain vector are equivalent. of.

其中，v₁表示时频单元。The time-frequency matrix may be a matrix of dimension N _t ×N _f . Optionally, the time-frequency matrix can be determined by, but not limited to, any of the following formulas:

Among them, v ₁ represents the time-frequency unit.

The time-frequency vector may be a vector of length N _t ×N _f . Optionally, the time-frequency vector can be determined by, but not limited to, any of the following formulas:

The above formula is only an example provided by the embodiment of the present application, and the embodiment of the present application does not specifically limit the determination formula of the time-frequency unit.

In addition, the time-frequency unit may also have other names, such as frequency-time unit. Similarly, time-frequency vectors can have other names, such as frequency-time vectors. Time-frequency matrices can also have other names, such as frequency-time matrices. This embodiment of the present application does not specifically limit this.

7. Air frequency unit

A space-frequency unit is determined according to a space-domain basis vector and a frequency-domain basis vector. In this embodiment of the present application, the space-frequency unit may be a space-frequency matrix or a space-frequency vector. It can be understood that the space-frequency matrix and the space-frequency vector can be converted to each other, and both can be determined by the same space-domain basis vector and the same frequency-domain basis vector, so the space-frequency matrix and the space-frequency vector are equivalent. .

其中，v₂表示空频单元。The space-frequency matrix may be a matrix of dimension N _s ×N _f . Optionally, the space-frequency matrix can be determined by, but not limited to, any of the following formulas:

Among them, v ₂ represents the space frequency unit.

The space frequency vector may be a vector of length N _t ×N _f . Optionally, the space-frequency vector can be determined by, but not limited to, any of the following formulas:

The above formula is only an example provided by the embodiment of the present application, and the embodiment of the present application does not specifically limit the determination formula of the space-frequency unit.

In addition, the space-frequency unit may also have other names, such as frequency-space unit. Similarly, space-frequency vectors can have other names, such as frequency-space vectors. The space-frequency matrix can also have other names, such as frequency-space matrix. This embodiment of the present application does not specifically limit this.

8. Space-time unit

The spatiotemporal unit is used to characterize the variation law of the channel in the two dimensions of time domain and spatial domain. A spatiotemporal unit is determined from a temporal basis vector and a spatial basis vector. In this embodiment of the present application, the space-time unit may be a space-time matrix or a space-time vector. It can be understood that both the space-time matrix and the space-time vector can be determined by the same time-domain basis vector and the same space-time basis vector, and the space-time matrix and the space-time vector can be converted to each other, and, therefore, the space-time matrix and the space-time vector are equivalent.

其中，v₃表示时空单元。The space-time matrix may be a matrix of dimension N _s ×N _t . Optionally, the space-time matrix can be determined by, but not limited to, any of the following formulas:

where v ₃ represents the space-time unit.

The space-time vector can be a vector of length N _t ×N _f . Optionally, the space-time vector can be determined by, but not limited to, any of the following formulas:

The above formula is only an example provided by the embodiment of the present application, and the embodiment of the present application does not specifically limit the determination formula of the space-frequency unit.

In addition, space-time units can also have other names, such as space-time units. Similarly, space-time vectors can have other names, such as space-time vectors. Space-time matrices can also have other names, such as space-time matrices. This embodiment of the present application does not specifically limit this.

9. Time-frequency space unit

The time-frequency-space unit is used to characterize the variation law of the channel in the three dimensions of time domain, frequency domain, and spatial domain. A time-frequency-space unit is determined by a time-domain basis vector, a frequency-domain basis vector, and a spatial-domain basis vector. In other words, a time-frequency space unit is determined according to a time-domain basis vector and a space-frequency unit. In other words, a time-frequency space unit is determined according to a frequency-domain basis vector and a time-frequency unit. In other words, a time-frequency space unit is determined according to a space-domain basis vector and a time-frequency unit.

In specific implementation, the time-frequency space unit is a time-frequency space matrix or a time-frequency space vector. It can be understood that the time-frequency space matrix and the time-frequency space vector can be converted to each other, and the time-frequency space matrix and the time-frequency space vector are equivalent.

The time-frequency space matrix can be a three-dimensional matrix or a two-dimensional matrix. It can be understood that a three-dimensional matrix is a matrix with three dimensions, and a two-dimensional matrix is a matrix with two dimensions. For convenience of description, if the time-frequency-space matrix is a three-dimensional matrix, the three dimensions of the time-frequency-space matrix are hereinafter referred to as a time-domain dimension, a frequency-domain dimension, and a space-domain dimension, respectively.

If the time-frequency space matrix is a three-dimensional matrix, the number of elements contained in the three-dimensional matrix in the time domain dimension is N _t , the number of elements contained in the frequency domain dimension is N _f , and the number of elements contained in the space domain dimension is: N _s . Optionally, the time-frequency space matrix can be determined by, but not limited to, any of the following formulas:

其中，

表示时频空矩阵，该时频空矩阵为三维矩阵。

in,

Represents a time-frequency-space matrix, which is a three-dimensional matrix.

If the time-frequency space matrix is a two-dimensional matrix, the time-frequency space matrix can be implemented in the following three ways:

在这种情况下，时频空矩阵可以但不限于通过如下任一公式确定：Mode 1. The two dimensions of the time-frequency space matrix may be respectively referred to as the time-frequency dimension and the space domain dimension. The number of elements included in the time-frequency space matrix in the time-frequency dimension is N _t N _f , and the number of elements included in the space dimension is: N _s . The time-frequency space matrix can be expressed as

In this case, the time-frequency space matrix can be determined by, but not limited to, any of the following formulas:

在这种情况下，时频空矩阵可以但不限于通过如下任一公式确定：Mode 2: The two dimensions of the time-frequency-space matrix may be respectively referred to as the space-time dimension and the frequency-domain dimension. The number of elements included in the time-frequency space matrix in the space-time dimension is N _t N _s , and the number of elements included in the frequency-domain dimension is N _f . The time-frequency space matrix can be expressed as

In this case, the time-frequency space matrix can be determined by, but not limited to, any of the following formulas:

在这种情况下，时频空矩阵可以但不限于通过如下任一公式确定：Mode 3: The two dimensions of the time-frequency space matrix may be respectively called the space-frequency dimension and the time-domain dimension. The number of elements included in the space-frequency dimension of the time-frequency space matrix is N _s N _f , and the number of elements included in the time-domain dimension is N _t . The time-frequency space matrix can be expressed as

In this case, the time-frequency space matrix can be determined by, but not limited to, any of the following formulas:

其中，V^all表示时频空向量。If the time-frequency space unit is a time-frequency space vector, the length of the time-frequency space vector is N _t ×N _f ×N _s . Optionally, the time-frequency space vector can be determined by, but not limited to, any of the following formulas:

Among them, V ^all represents the time-frequency space vector.

The above formula is only an example provided by the embodiment of the present application, and the embodiment of the present application does not specifically limit the determination formula of the space-time frequency unit. For example, in the above formula, the conjugate vector (or transpose vector, or conjugate transpose vector) of the time domain base vector can be used to replace the time domain base vector, and the conjugate vector (or transpose vector) of the frequency domain base vector , or the conjugate transpose vector) replaces the frequency domain basis vector, and the conjugate vector (or the transpose vector, or the conjugate transpose vector) of the time domain basis vector replaces the time domain basis vector.

10. Time domain basis vector set

The time-domain basis vector set includes a plurality of time-domain basis vectors. Optionally, any two time-domain basis vectors in the time-domain basis vector set are orthogonal.

The time domain basis vectors in the time domain basis vector set can be expressed as:

Wherein, O _t is a preset value, O _t is a positive integer, 0≤m _t ≤O _t N _t -1. In the specific implementation process, O _t can be understood as oversampling in one dimension of the time domain.

11. Frequency domain basis vector set

The frequency domain basis vector set includes a plurality of frequency domain basis vectors. Optionally, any two frequency-domain basis vectors in the frequency-domain basis vector set are orthogonal.

The frequency domain basis vectors in the frequency domain basis vector set can be expressed as:

Wherein, Of is a preset value, Of _{is a positive integer, 0≤m f ≤O f N f -1 .} In the specific implementation process, Of can be understood as _oversampling in one dimension of the time domain.

12. Airspace basis vector set

The set of spatial basis vectors includes a plurality of spatial basis vectors. Optionally, any two spatial basis vectors in the set of spatial basis vectors are orthogonal.

The spatial basis vectors in the set of spatial basis vectors can be expressed as:

Wherein, O ₁ and O ₂ are preset values, O ₁ and O ₂ are both positive integers, 0≤m ₁ ≤O ₁ N ₁ -1, and 0≤m ₂ ≤O ₂ N ₂ -1. In the specific implementation process, the role of O ₁ and O ₂ can be understood as oversampling in two dimensions of the airspace. N ₁ and N ₂ can be used to represent the number of the element groups 302 in each row (or column) of the element groups 302 in the antenna array 300 shown in FIG. 3 and the number of the element groups 302 in each column (or row) of the element groups 302 quantity.

13. Time-frequency unit set, space-frequency unit set, space-time unit set, time-frequency space unit set

The set of time-frequency units includes a plurality of time-frequency units. In a specific implementation, the time-frequency unit set may be a time-frequency vector set or a time-frequency matrix set. It can be understood that the set of time-frequency vectors includes multiple time-frequency vectors, and the set of time-frequency matrices includes multiple time-frequency matrices. Optionally, the time-frequency unit set may be preset, or may be determined according to the time-domain basis vector set and the frequency-domain basis vector set.

The space frequency unit set includes a plurality of space frequency units. In a specific implementation, the set of space-frequency units may be a set of space-frequency vectors or a set of space-frequency matrices. It can be understood that the set of space-frequency vectors includes multiple space-frequency vectors, and the set of space-frequency matrices includes multiple space-frequency matrices. Optionally, the space-frequency unit set may be preset, or may be determined according to the space-domain basis vector set and the frequency-domain basis vector set.

The set of spatiotemporal units includes a plurality of spatiotemporal units. In a specific implementation, the set of space-time units may be a set of space-time vectors or a set of space-time matrices. It can be understood that the set of space-time vectors includes multiple space-time vectors, and the set of space-time matrices includes multiple space-time matrices. Optionally, the set of space-time units may be preset, or may be determined according to the set of time-domain basis vectors and the set of spatial-domain basis vectors.

The time-frequency-space unit set includes a plurality of time-frequency space units. In a specific implementation, the set of time-frequency space units may be a set of time-frequency space vectors or a set of time-frequency space matrices. It can be understood that the set of time-frequency space vectors includes multiple time-frequency space vectors, and the set of time-frequency space matrices includes multiple time-frequency space matrices. Optionally, the set of time-frequency space units may be preset, or may be determined according to the set of time-domain basis vectors, the set of frequency-domain basis vectors, and the set of spatial-domain basis vectors.

14. Weighting factor

The weighting coefficient is used to represent the weight of the time-frequency space unit in the weighted summation. Weighting coefficients include magnitude and phase. For example, the weighting coefficients are ae ^jθ , where a is the magnitude and θ is the phase.

Optionally, the weighting coefficient fed back by the terminal to the network device is subjected to quantization processing to reduce feedback overhead. It should be noted that the magnitude (or modulus) of the weighting coefficient may be zero, or close to zero. When quantizing the magnitudes of these weighting coefficients with zero or approximately zero magnitudes, their quantized values may be zero. If the quantized value of the magnitude of the weighting coefficient is 0, the weighting coefficient may be referred to as a weighting coefficient with a magnitude of zero. Correspondingly, if the quantized value of the magnitude of the weighting coefficient is not 0, the weighting coefficient may be referred to as a weighting coefficient with a non-zero magnitude.

15. Normalization and Normalization Coefficients

Before quantizing the weighting coefficients, each weighting coefficient may be normalized, that is, the absolute value of each weighting coefficient may be treated as a relative value with respect to the normalization coefficient. The normalization coefficient may be pre-configured, or may be a certain weighting coefficient among multiple weighting coefficients, for example, the weighting coefficient with the largest amplitude (or, in other words, the modulus).

The following description takes the weighting coefficient with the largest amplitude among the multiple weighting coefficients as the normalization coefficient as an example for description. For example, the amplitude of the weighting coefficient with the largest amplitude can be classified as 1, and the phase can be classified as 0 or 2π; other weighting coefficients can be expressed as relative values with respect to the weighting coefficient with the largest amplitude. After normalization, the value range of the amplitude of each weighting coefficient is [0, 1], and the value range of the phase of each weighting coefficient is [0, 2π] or [−π, π].

In the embodiments shown below, the normalization may be a unit of polarization direction to determine the maximum weighting coefficient, or it may be a transmission layer (for example, one or more polarization directions on a transmission layer) as a unit The maximum weighting coefficient is determined in units, and the maximum weighting coefficient may also be determined in units of all transport layers. Therefore, normalization can be performed in different ranges for each polarization direction, each transmission layer or all transmission layers, etc. It should be understood that the normalized units are not limited to those listed above, which are not limited in this application.

16. Reference signal, reference signal resource, reference signal resource set

The reference signal includes but is not limited to a channel state information reference signal (CSI-RS). The reference signal resource corresponds to at least one of a time domain resource, a frequency domain resource, and a code domain resource of the reference signal. The set of reference signal resources includes one or more reference signal resources.

Taking the reference signal resources as CSI-RS resources as an example, the CSI-RS resources can be divided into non-zero power (NZP) CSI-RS resources and zero power (zero power, ZP) CSI-RS resources.

CSI-RS resources can be configured through a CSI reporting setting. The CSIreporting setting can configure a set of CSI-RS resources for channel measurement (CM). Optionally, the CSI reporting setting may also configure a set of CSI-RS resources for interference measurement (interference measurement, IM). Optionally, the CSI reporting setting may also configure a set of non-zero power CSI-RS resources for interference measurement.

The CSI reporting setting can be used to indicate the time-domain behavior, bandwidth, format corresponding to the report quantity, etc. of CSI reporting. Among them, the time domain behavior includes, for example, periodic (periodic), semi-persistent (semi-persistent) and aperiodic (aperiodic). The terminal device can generate a CSI report based on a CSI reporting setting.

17. Channel state information (CSI)

Exemplarily, the channel state information may include: a precoding matrix indicator (PMI), a rank indication (RI), a channel quality indicator (CQI), a channel state information reference signal resource indicator (CSI- At least one of RS resource indicator, CRI) and layer indicator (layer indicator, LI).

As shown in FIG. 4 , an information feedback method provided in an embodiment of the present application includes the following steps:

S101. The terminal generates first indication information.

The first indication information is used to indicate the M time-frequency space units and the weighting coefficients of the M time-frequency space units, where M is a positive integer.

In this embodiment of the present application, the value of M is predefined, or indicated by the network device sending configuration information to the terminal. Optionally, the configuration information may indicate the value of M in an explicit manner, for example, the configuration information includes the value of M. Alternatively, the configuration information indicates the value of M in an implicit manner. For example, in the case where M time-frequency space units are determined according to L space-domain basis vectors, K time-domain basis vectors, and N frequency-domain basis vectors, that is, in the case of M=L×K×N, the configuration The information may indirectly indicate the value of M by indicating the value of L, the value of K, and the value of N. Of course, the value of L, the value of K, and the value of N may be indicated by different information. For example, the value of L is indicated by the first information, the value of K is indicated by the second information, and the value of N is indicated by the third information.

It should be noted that the above configuration information, the first information, the second information, and the third information may be carried in RRC signaling, MAC-CE signaling, or DCI, and the embodiments of the present application are not limited thereto.

For convenience of description, hereinafter, the information used to indicate the M time-frequency space units in the first indication information is called component information, and the information used to indicate the weighting coefficients of the M time-frequency space units is called coefficient information. That is, the first indication information includes: component information and coefficient information.

Optionally, the above-mentioned component information may be implemented in any one of the following manners 1 to 5:

Manner 1: The component information is used to indicate M time-frequency-space units in the time-frequency-space unit set.

(1), the component information includes an index of each time-frequency-space unit of the M time-frequency-space units in the time-frequency-space unit set.

In this way, assuming that the time-frequency space unit set includes Q time-frequency space units, the overhead of the component information is

(2) The component information includes: an index of the combination of the M time-frequency-space units in the time-frequency-space unit set.

可以理解的是，分量信息所指示的M个时频空单元所构成的组合仅是

个组合的其中之一。终端和网络设备之间可以预先设置这

个组合中每一个组合的索引，从而终端反馈M个时频空单元组合的索引，能够使网络设备确定对应的M个时频空单元。可以理解的是，这种情况下，分量信息的开销为

Assuming that the time-frequency space unit set includes Q time-frequency space units, the number of combinations of M time-frequency space units selected from the time-frequency space unit set is:

It can be understood that the combination formed by the M time-frequency space units indicated by the component information is only

one of the combinations. This can be preset between the terminal and the network device.

The index of each of the combinations, so that the terminal feeds back the indices of the M time-frequency-space unit combinations, so that the network device can determine the corresponding M time-frequency-space units. It can be understood that in this case, the overhead of the component information is

(3) The component information includes: an index of a subset of time-frequency-space units and an index of each time-frequency-space unit of the M time-frequency-space units in the subset of time-frequency-space units.

As the name implies, the subset of time-frequency space units is a subset of the set of time-frequency space units. The set of time-frequency space units may include multiple subsets of time-frequency space units. The network device and the terminal may preset indexes of each time-frequency-space unit subset, and time-frequency-space units included in each time-frequency-space unit subset. In this way, by feeding back the index of the time-frequency-space unit subset to the network device, the terminal can make the network device know which time-frequency-space unit subset the M time-frequency-space units are selected from.

Assuming that the time-frequency space unit set includes Q time-frequency space units, the time-frequency space unit set can be divided into P time-frequency space unit subsets, each time-frequency space unit subset includes Q ₁ time-frequency space unit, Q =Q ₁ ×P. In this case, the overhead of the component information is:

(4) The component information includes: an index of the time-frequency-space unit subset and an index of the combination of the M time-frequency-space units in the time-frequency-space unit subset.

可以理解的是，分量信息所指示的M个时频空单元所构成的组合仅是

个组合的其中之一。终端和网络设备之间可以预先设置这

个组合中每一个组合的索引，从而终端反馈M个时频空单元组合在时频空单元子集中的索引，能够使网络设备从该时频空单元子集中确定对应的M个时频空单元。Assuming that the time-frequency space unit set includes Q time-frequency space units, the time-frequency space unit set can be divided into P time-frequency space unit subsets, each time-frequency space unit subset includes Q ₁ time-frequency space unit, Q =Q ₁ ×P. In this case, the number of combinations of M time-frequency-space units selected from the subset of time-frequency-space units is

It can be understood that the combination formed by the M time-frequency space units indicated by the component information is only

one of the combinations. This can be preset between the terminal and the network device.

The index of each of the combinations, so that the terminal feeds back the indices of the M time-frequency-space unit combinations in the time-frequency-space unit subset, enabling the network device to determine the corresponding M time-frequency-space units from the time-frequency-space unit subset. .

Understandably, in this case the overhead of the component information is:

(5) The component information includes: a bitmap (bitmap) corresponding to the time-frequency space unit set. Wherein, every q bits in the bitmap corresponding to the time-frequency space unit set corresponds to a time-frequency space unit in the time-frequency space unit set, and the value of the q bits is used to indicate the time-frequency space unit corresponding to the bit. Whether the unit belongs to the M time-frequency space units, q is a positive integer. For example, taking q=1 as an example, the value of a bit in the bitmap is "0", then the time-frequency space unit corresponding to this bit does not belong to the M time-frequency space units; If the value is "1", the time-frequency space unit corresponding to this bit belongs to the M time-frequency space units.

It can be understood that, assuming that the time-frequency space unit set includes Q time-frequency space units, the overhead of the component information is Q×q.

(6) The component information includes: an index of a subset of time-frequency space units and a bitmap corresponding to the subset of time-frequency space units. Wherein, each bit in the bitmap corresponding to the time-frequency space unit subset corresponds to a time-frequency space unit in the time-frequency space unit subset, and the value of each bit is used to indicate whether the time-frequency space unit corresponding to the bit is belong to the M time-frequency space units.

Assuming that the time-frequency space unit set includes Q time-frequency space units, the time-frequency space unit set can be divided into P time-frequency space unit subsets, each time-frequency space unit subset includes Q ₁ time-frequency space unit, Q =Q ₁ ×P. In this case, the overhead of the component information is:

The overhead of component information in various situations has been specifically analyzed above. The overhead of other information (for example, space-domain basis vector information, frequency-domain basis vector information, etc.) hereinafter may refer to the analysis of the above content, which will be uniformly described here, and will not be repeated below.

Manner 2: The component information is used to indicate L spatial domain basis vectors, K time domain basis vectors, and N frequency domain basis vectors. Wherein, L, K, and N are all positive integers. L, K, N are pre-defined or pre-configured by the network device. In the case where L, K, and N are preconfigured by the network device, L, K, and N may be indicated by the same information, or may be indicated by different information, and the embodiment of the present application is not limited thereto.

For the convenience of description, the information in the component information used to indicate the L space-domain basis vectors is abbreviated as spatial-domain basis vector information, and the information used to indicate K time-domain basis vectors in the component information is abbreviated as time-domain basis vector information. The information used to indicate the N frequency-domain basis vectors in the component information is simply referred to as frequency-domain basis vector information.

Optionally, the spatial basis vector information may include at least one of the following:

(1) The index of each of the L airspace basis vectors in the airspace basis vector set;

(2) the index of the combination of the L space base vectors in the space base vector set;

(3) the index of the subset of spatial basis vectors, and the index of each of the L spatial basis vectors in the subset of spatial basis vectors;

(4) the index of the airspace basis vector subset, and the index of the combination of the L airspace basis vectors in the airspace basis vector subset;

(5) A bitmap corresponding to the airspace basis vector set; wherein, every q bits in the bitmap corresponding to the airspace basis vector set corresponds to an airspace basis vector in the airspace basis vector set, and the value of the q bits is used to indicate Whether the corresponding airspace basis vectors belong to the L airspace basis vectors;

(6) The index of the airspace basis vector subset, and the bitmap corresponding to the airspace basis vector subset; wherein, every q bits in the bitmap corresponding to the airspace basis vector subset corresponds to an airspace basis vector in the airspace basis vector subset, The value of the q bits is used to indicate whether the corresponding spatial basis vector belongs to the L spatial basis vectors.

Optionally, the time-domain basis vector information may include at least one of the following:

(1) The index of each time-domain basis vector in the K time-domain basis vectors in the time-domain basis vector set;

(2) The index of the combination of the K time-domain basis vectors in the time-domain basis vector set;

(3) the index of the subset of time-domain basis vectors, and the index of each of the K time-domain basis vectors in the subset of time-domain basis vectors;

(4) the index of the subset of time-domain basis vectors, and the index of the combination of K time-domain basis vectors in the subset of time-domain basis vectors;

(5) Bitmap corresponding to the time-domain basis vector set; wherein, every q bits in the bitmap corresponding to the time-domain basis vector set corresponds to a time-domain basis vector in the time-domain basis vector set, and the value of the q bits The value is used to indicate whether the corresponding time-domain base vector belongs to the K time-domain base vectors;

(6) The index of the subset of time-domain basis vectors, and the bitmap corresponding to the subset of time-domain basis vectors; wherein, every q bits in the bitmap corresponding to the subset of time-domain basis vectors corresponds to one of the subsets of time-domain basis vectors A time-domain basis vector, the value of the q bits is used to indicate whether the corresponding time-domain basis vector belongs to the K time-domain basis vectors.

Optionally, the frequency-domain basis vector information may include at least one of the following:

(1) The index of each frequency domain base vector in the N frequency domain base vectors in the frequency domain base vector set;

(2) the index of the combination of N frequency domain basis vectors in the frequency domain basis vector set;

(3) the index of the frequency domain basis vector subset, and the index of each frequency domain basis vector in the frequency domain basis vector subset in the N frequency domain basis vectors;

(4) the index of the frequency domain basis vector subset, and the index of the combination of N frequency domain basis vectors in the frequency domain basis vector subset;

(5) A bitmap corresponding to the frequency-domain basis vector set; wherein, every q bits in the bitmap corresponding to the frequency-domain basis vector set corresponds to a frequency-domain basis vector in the frequency-domain basis vector set, and the value of the q bits The value is used to indicate whether the corresponding frequency domain base vector belongs to the N frequency domain base vectors;

(6) The index of the frequency-domain basis vector subset, and the bitmap corresponding to the frequency-domain basis vector subset; wherein, every q bits in the bitmap corresponding to the frequency-domain basis vector subset corresponds to one of the frequency-domain basis vector subsets A frequency domain base vector, the value of the q bits is used to indicate whether the corresponding frequency domain base vector belongs to the N frequency domain base vectors.

It should be noted that the L space domain basis vectors, K time domain basis vectors and N frequency domain basis vectors can determine L×K×N time-frequency space units. If L×K×N>M, the component information further includes: first position information, where the first position information is used to indicate the positions of the M time-frequency space units in the L×K×N time-frequency space units.

Optionally, the first location information may include any one of the following:

(1) The first bit map, every q bits in the first bit map corresponds to one time-frequency space unit in the L×K×N time-frequency space units, and the q bits are used to indicate whether the time-frequency space unit belongs to the M time-frequency space units;

(2) the index of the combination of the M time-frequency space units in the L×K×N time-frequency space units;

(3) the index of each time-frequency space unit in the M time-frequency space units in the L×K×N time-frequency space units;

(4) The position of the space-domain basis vector corresponding to each time-frequency-space unit in the M time-frequency-space units in the L space-domain basis vectors, and the time-domain basis vector corresponding to each time-frequency space unit in the K time domains The position in the base vector, and the position of the frequency domain base vector corresponding to each time-frequency space unit in the N frequency domain base vectors.

Manner 3: The component information is used to indicate L spatial domain basis vectors and X ₁ time-frequency units. Wherein, L and X ₁ are both positive integers. L, X1 are pre _- defined or pre-configured by the network device. In the case where L and X ₁ are preconfigured by the network device, L and X ₁ may be indicated by the same information, or may be indicated by different information, which is not limited in this embodiment of the present application.

For ease of description, hereinafter, the information used to indicate the L spatial basis vectors in the component information is simply referred to as spatial basis vector information, and the information used to indicate X ₁ time-frequency units in the component information is simply referred to as time-frequency unit information. It should be noted that, for the specific implementation manner of the spatial basis vector information, reference may be made to the foregoing description, which will not be repeated here.

Optionally, the time-frequency unit information may include at least one of the following:

(1) the index of each time-frequency unit in the time-frequency unit set of X ₁ time-frequency units;

(2) the index of the combination of X ₁ time-frequency units in the time-frequency unit set;

(3) the index of the time-frequency unit subset, and the index of each time-frequency unit in the time-frequency unit subset of X ₁ time-frequency units;

(4) the index of the time-frequency unit subset, and the index of the combination of X ₁ time-frequency units in the time-frequency unit subset;

(5) Bitmap corresponding to the time-frequency unit set; wherein, every q bits in the bitmap corresponding to the time-frequency unit set corresponds to a time-frequency unit in the time-frequency unit set, and the value of the q bits is used to indicate Whether the corresponding time-frequency unit belongs to the X ₁ time-frequency units;

(6) The index of the time-frequency unit subset, and the bitmap corresponding to the time-frequency unit subset; wherein, every q bits in the bitmap corresponding to the time-frequency unit subset corresponds to a frequency domain basis vector in the time-frequency unit subset , the value of the q bits is used to indicate whether the corresponding time-frequency unit belongs to the X ₁ time-frequency units.

It should be noted that the L space domain basis vectors and X ₁ time-frequency units can determine L×X ₁ time-frequency space units. If L×X ₁ >M, the component information further includes: second position information, where the second position information is used to indicate the positions of the M time-frequency space units in the L×X ₁ time-frequency space units.

Optionally, the second location information may include at least one of the following:

(1) A second bitmap, where every q bits in the second bitmap corresponds to one time-frequency space unit in L×X ₁ time-frequency space units, and the q bits are used to indicate the corresponding time-frequency space unit Whether the frequency-space unit belongs to the M time-frequency-space units;

(2) the index of the combination of M time-frequency space units in L×X ₁ time-frequency space units;

(3) the index of each time-frequency space unit in the M time-frequency space units in L×X ₁ time-frequency space units;

(4) The position of the space-domain basis vector corresponding to each time-frequency space unit in the M time-frequency space units in the L space-domain basis vectors, and the time-frequency unit corresponding to each time-frequency space unit when X ₁ position in the frequency unit.

Manner 4: The component information is used to indicate K time-domain basis vectors and X ₂ space-frequency units. Wherein, L and X ₂ are both positive integers. L, X ₂ are pre-defined or pre-configured by the network device. In the case where L and X ₂ are pre-configured by the network device, L and X ₂ may be indicated by the same information, or may be indicated by different information, which is not limited in this embodiment of the present application.

For the convenience of description, the information used to indicate the K time-domain basis vectors in the component information is abbreviated as time-domain basis vector information, and the information used to indicate X ₂ space-frequency units in the component information is abbreviated as space-frequency unit information. . It should be noted that, for the specific implementation manner of the time-domain basis vector information, reference may be made to the foregoing description, which will not be repeated here.

Optionally, the space-frequency unit information may include at least one of the following:

(1) the index of each space-frequency unit in the space-frequency unit set in the X ₂ space-frequency units;

(2) the index of the combination of X ₂ space-frequency units in the space-frequency unit set;

(3) the index of the space-frequency unit subset, and the index of each space-frequency unit in the space-frequency unit subset of X ₂ space-frequency units;

(4) the index of the space-frequency unit subset, and the index of the combination of X ₂ space-frequency units in the space-frequency unit subset;

(5) A bitmap corresponding to the space-frequency unit set; wherein, every q bits in the bitmap corresponding to the space-frequency unit set corresponds to a space-frequency unit in the space-frequency unit set, and the value of the q bits is used to indicate Whether the corresponding space-frequency unit belongs to the X ₂ space-frequency units;

(6) The index of the space-frequency unit subset, and the bitmap corresponding to the space-frequency unit subset; wherein, every q bits in the bitmap corresponding to the space-frequency unit subset corresponds to a frequency domain basis vector in the space-frequency unit subset , the value of the q bits is used to indicate whether the corresponding space-frequency unit belongs to the X ₂ space-frequency units.

It should be noted that, K time-domain basis vectors and X ₂ space-frequency units can determine K×X ₂ time-frequency space units. If K×X ₂ >M, the component information further includes: third position information, where the third position information is used to indicate the positions of the M time-frequency space units in the K×X ₂ time-frequency space units.

Optionally, the third location information may include at least one of the following:

(1) The third bitmap, where every q bits in the third bitmap corresponds to one time-frequency space unit in the K×X ₂ time-frequency space units, and the q bits are used to indicate whether the corresponding time-frequency space unit is belong to the M time-frequency space units;

(2) the index of the combination of M time-frequency space units in K×X ₂ time-frequency space units;

(3) the index in each time-frequency-space unit K×X ₂ time-frequency-space units in the M time-frequency space units;

(4) The position of the time-domain basis vector corresponding to each time-frequency-space unit in the M time-frequency-space units in the K time-domain basis vectors, and the space-frequency unit corresponding to each time-frequency-space unit in X ₂ position in the space-frequency unit.

Manner 5: The component information is used to indicate N frequency domain basis vectors and X ₃ space-time units. Wherein, L and X ₂ are both positive integers. L, X ₂ are pre-defined or pre-configured by the network device. In the case where L and X ₂ are pre-configured by the network device, L and X ₂ may be indicated by the same information, or may be indicated by different information, which is not limited in this embodiment of the present application.

For ease of description, the information in the component information for indicating the N frequency-domain basis vectors is simply referred to as frequency-domain basis vector information, and the information in the component information for indicating X ₃ space-time units is simply referred to as space-time unit information. It should be noted that, for the specific implementation manner of the frequency-domain basis vector information, reference may be made to the foregoing description, which will not be repeated here.

Optionally, the spatiotemporal unit information may include at least one of the following:

(1) the index of each space-time unit in the set of space-time units in the X ₃ space-time units;

(2) the index of the combination of X ₃ space-time units in the space-time unit set;

(3) the index of the space-time unit subset, and the index of each space-time unit in the space-time unit subset of X ₃ space-time units;

(4) the index of the space-time unit subset, and the index of the combination of X ₃ space-time units in the space-time unit subset;

(5) Bitmap corresponding to the space-time unit set; wherein, every q bits in the bitmap corresponding to the space-time unit set corresponds to a space-time unit in the space-time unit set, and the value of the q bits is used to indicate the corresponding space-time unit Whether it belongs to the X ₃ space-time units;

(6) The index of the space-time unit subset, and the bitmap corresponding to the space-time unit subset; wherein, each bit in the bitmap corresponding to the space-time unit subset corresponds to a frequency-domain basis vector in the space-time unit subset, and the The value is used to indicate whether the corresponding space-time unit belongs to the X ₃ space-time units.

It should be noted that, N frequency domain basis vectors and X ₃ space-time units can determine N×X ₃ time-frequency space units. If N×X ₃ >M, the component information further includes: fourth position information, where the fourth position information is used to indicate the positions of the M time-frequency space units in the N×X ₃ time-frequency space units.

Optionally, the fourth location information may include at least one of the following:

(1) The fourth bitmap, every q bits in the fourth bitmap corresponds to one time-frequency space unit in the N×X ₃ time-frequency space units, and the q bits are used to indicate the corresponding time-frequency space unit Whether it belongs to the M time-frequency space units;

(2) the index of the combination of M time-frequency space units in N×X ₃ time-frequency space units;

(3) the index in each time-frequency-space unit N×X ₃ time-frequency-space units in the M time-frequency space units;

(4) The position of the frequency-domain basis vector corresponding to each time-frequency-space unit in the M time-frequency-space units in the N time-domain basis vectors, and the space-time unit corresponding to each time-frequency-space unit in X ₃ position in the space-time unit.

The above is an introduction to the component information. In specific implementation, the terminal may also use other ways to implement the component information, which is not limited in this embodiment of the present application.

It can be understood that, which of the modes 1 to 5 the terminal uses to realize the component information may be defined by the protocol, or determined by mutual negotiation between the terminal and the network device, or pre-configured by the network device for the component information. terminal, the embodiments of the present application are not limited to this.

In this embodiment of the present application, none of the quantized values of the magnitudes of the weighting coefficients of the M time-frequency-space units are zero. In other words, the weighting coefficients of the M time-frequency space units are all weighting coefficients with non-zero amplitudes.

In this case, the coefficient information can be implemented in any of the following ways:

(1) The coefficient information includes: quantization information of each of the M weighting coefficients.

Wherein, the quantization information of the weighting coefficient includes the quantization information of the amplitude and the quantization information of the phase. The quantization information of the amplitude may be the quantized value of the amplitude, or may be the index of the quantized value of the amplitude. The quantization information of the phase may be a quantized value of the phase, or may be an index of the quantized value of the phase.

(2) The coefficient information includes: position information of one or more normalization coefficients, and quantization information of each of the M weighting coefficients except the normalization coefficients.

Optionally, the position information of the normalization coefficient may be an index of the normalization coefficient among the M weighting coefficients. For example, the M weighting coefficients may be numbered in a predefined order, and the positions of the normalization coefficients are indicated by the indices of the normalization coefficients.

In this embodiment of the present application, the one or more normalization coefficients may be: a first normalization coefficient, one or more second normalization coefficients, and/or one or more third normalization coefficients coefficient.

Optionally, the first normalization coefficient may be the weighting coefficient with the largest magnitude among the M weighting coefficients. The first normalization coefficient is used for normalizing each of the M weighting coefficients.

The second normalization coefficient and the third normalization coefficient will be described below with reference to FIG. 5 . As shown in FIG. 5 , it is a schematic diagram of a time-frequency space unit set provided by an embodiment of the present application. FIG. 5 shows a three-dimensional coordinate system and the positions of the time-frequency-space units in the time-frequency-space unit set in the three-dimensional coordinate system. Among them, f represents the frequency domain dimension, s represents the spatial domain dimension, and t represents the time domain dimension. Each circle represents a time-frequency space unit. The time-frequency space units represented by the black circles do not belong to the M time-frequency space units, and the time-frequency space units represented by the white circles belong to the M time-frequency space units.

The second normalization coefficient may be the weighting coefficient with the largest amplitude among the weighting coefficients corresponding to the time-frequency-space units in the same plane among the M time-frequency-space units. The second normalization coefficient is used to normalize the weighting coefficients corresponding to the time-frequency-space units in the same plane among the M time-frequency-space units.

It can be understood that the above-mentioned plane can be a plane composed of a time-domain dimension and a spatial-domain dimension in a three-dimensional coordinate system, a plane composed of a time-domain dimension and a frequency-domain dimension, or a frequency-domain dimension and a spatial-domain dimension. the plane

The third normalization coefficient may be the weighting coefficient with the largest magnitude among the weighting coefficients corresponding to the time-frequency-space units in the same row among the M time-frequency-space units. The third normalization coefficient is used to normalize the weighting coefficients corresponding to the time-frequency-space units in the same row among the M time-frequency-space units.

It can be understood that the above row may be a row in the frequency domain dimension, or may be a row in the time domain dimension, or may be a row in the space domain dimension.

Optionally, if the first normalization coefficient and the second normalization coefficient exist in the coefficient information at the same time, it means that the M weighting coefficients adopt multi-level quantization. The first-level quantization is to quantize the relative value of the second normalization coefficient determined by processing the first normalization coefficient. The second-level quantization is to quantize the relative value of the weighting coefficient determined by the second normalization coefficient processing. Therefore, in this case, the coefficient information may further include: quantization information of the second normalization coefficient.

Optionally, if the first normalization coefficient and the third normalization coefficient exist in the coefficient information at the same time, it means that the M weighting coefficients adopt multi-level quantization. The first-level quantization is to quantize the relative value of the third normalization coefficient determined by processing the first normalization coefficient. The second-stage quantization is to quantize the relative value of the weighting coefficient determined by the third normalization coefficient processing. Therefore, in this case, the coefficient information may further include: quantization information of the third normalization coefficient.

Optionally, if the second normalization coefficient and the third normalization coefficient exist in the coefficient information at the same time, it means that the M weighting coefficients use multi-level quantization. The first-level quantization is to quantize the relative value of the third normalization coefficient determined through the second normalization coefficient processing. The second-level quantization is to quantize the relative values of the weighting coefficients determined by the third normalization coefficient processing. Therefore, in this case, the coefficient information may further include: quantization information of the third normalization coefficient.

Optionally, if the first normalization coefficient, the second normalization coefficient and the third normalization coefficient exist in the coefficient information at the same time, it means that the M weighting coefficients are multi-level quantization. The first-level quantization is to quantize the relative value of the second normalization coefficient determined by processing the first normalization coefficient. The second-level quantization is to quantize the relative value of the third normalization coefficient determined by the second normalization coefficient processing. The third-level quantization is to quantize the relative value of the weighting coefficient determined by the third normalization coefficient processing. Therefore, in this case, the coefficient information may further include: quantization information of the second normalization coefficient and quantization information of the third normalization coefficient.

It should be noted that the arrangement order of each weighting coefficient in the coefficient information may be predefined. In this way, the terminal or the network device can respectively indicate and analyze the quantization information of each weighting coefficient based on the same arrangement order.

Optionally, the first indication information is further used to indicate R time-frequency space units. The magnitudes of the weighting coefficients of the R time-frequency space units are zero. In other words, the quantized value of the magnitude of the weighting coefficients of the R time-frequency space units is zero.

It can be understood that, for how the first indication information indicates the R time-frequency space units, reference may be made to the foregoing description, which will not be repeated here.

In addition, since the magnitudes of the weighting coefficients corresponding to the R time-frequency space units are zero, the first indication information may not indicate the weighting coefficients corresponding to the R time-frequency space units, so as to reduce signaling overhead.

Certainly, the first indication information may also indicate the weighting coefficients of the R time-frequency space units. Thus, the coefficient information is actually used to indicate the weighting coefficients of the M+R time-frequency space units. In this case, system information can be implemented in any of the following ways:

(1) The system information includes: quantization information of each of the M+R weighting coefficients.

(2) The system information includes: position information of one or more normalization coefficients, and quantization information of each weighting coefficient except the normalization coefficient among the M+R weighting coefficients.

(3) The coefficient information includes: position information of one or more normalization coefficients, and quantization information of each weighting coefficient except the normalization coefficient among the M weighting coefficients with non-zero amplitudes.

Optionally, in the above manners (1) to (3), the coefficient information is also used to indicate the value of R. That is, the coefficient information is also used to indicate the number of weighting coefficients whose magnitude is non-zero among the M+R weighting coefficients.

Optionally, in the above-mentioned ways (1) to (3), the coefficient information further includes a bitmap, which is used to indicate the number and position of the weighting coefficients with non-zero amplitude among the M+R weighting coefficients, and the amplitude is The number and position of the zero weighting coefficients.

It should be noted that, for the specific description of the coefficient information used to indicate the weighting coefficients of the M+R time-frequency space units, reference may be made to the specific description of the coefficient information used to indicate the weighting coefficients of the M time-frequency space units in the preceding paragraph. This will not be repeated here.

S102. The terminal sends first indication information to the network device.

Wherein, the first indication information may be carried in a physical uplink shared channel (physical uplink share channel, PUSCH) or a physical uplink control channel (physical uplink control channel, PUCCH).

Optionally, the first indication information may be PMI, or some information elements in the PMI, or other indication information other than the PMI, which is not limited in this embodiment of the present application.

For a specific implementation manner of step S102, reference may be made to the prior art, and details are not described herein.

S103. The network device determines the M time-frequency space units and the weighting coefficients corresponding to the M time-frequency space units according to the first indication information.

After that, the network device may construct a precoding matrix (or a precoding vector) according to the M time-frequency space units and the M time-frequency space units. The codebook used for constructing the precoding matrix (or the precoding vector) may use the following time-frequency space codebook. It can be understood that the time-frequency space codebook is only an exemplary name proposed to distinguish it from the type I codebook and the type II codebook, and the time-frequency space codebook may also have other names, and the embodiments of the present application are not limited thereto.

Among them, the time-frequency space codebook can be:

α _m is the m-th weighting coefficient among the M weighting coefficients; V _m is the m-th time-frequency space unit among the M time-frequency space units; when V _m is the time-frequency space matrix, H is the precoding matrix; V When _m is a time-frequency space vector, H is a precoding vector.

为预编码矩阵，该预编码矩阵为三维矩阵；在公式(3)中，H^all为预编码向量。在公式(4)至(6)中，

均表示预编码矩阵，该预编码矩阵为二维矩阵。The above formula (1) can be transformed into the following formula (2) or (6). Among them, in formula (2),

is a precoding matrix, which is a three-dimensional matrix; in formula (3), ^Hall is a precoding vector. In formulas (4) to (6),

Both represent a precoding matrix, and the precoding matrix is a two-dimensional matrix.

Optionally, the above formula (2) can also be transformed into the following formula (7).

L个空域基向量中的第l个空域基向量；

为N个频域基向量中的第n个频域基向量；

为K个时域基向量中的第k个时域基向量；α_n,l,k为第l个空域基向量、第n个频域基向量以及第k个时域基向量对应的加权系数。in,

The l-th airspace basis vector among the L airspace basis vectors;

is the nth frequency domain base vector among the N frequency domain base vectors;

is the k-th time-domain base vector among the K time-domain base vectors; α _n,l,k is the weighting coefficient corresponding to the l-th space-domain base vector, the n-th frequency-domain base vector, and the k-th time-domain base vector .

Based on the technical solution shown in FIG. 4 , since each time-frequency-space unit in the M time-frequency-space units indicated by the first indication information is determined according to a frequency-domain basis vector, a time-domain basis vector, and a space-domain basis vector, and The time-domain basis vector can represent the variation law of the channel in the time domain. Therefore, the precoding matrix (or precoding vector) determined by the M time-frequency space units indicated by the first indication information and the M weighting coefficients can match The channel that the terminal changes over time ensures normal communication between the network device and the terminal.

Optionally, as shown in FIG. 6, before step S101, the method may further include step S201.

S201. The network device sends second indication information to the terminal.

Wherein, the second indication information is used to configure a preset channel state information feedback mode. That is, after the terminal receives the second indication information, the terminal adopts the preset channel state information feedback mode.

The preset channel state information feedback mode is used to instruct the terminal to detect reference signals of n time units to determine the channel state information. Wherein, the channel state information includes first indication information.

In this embodiment of the present application, the value of n may be predefined, or set by the network device by sending configuration information to the terminal. In this embodiment of the present application, the configuration information may indicate the value of n in an explicit manner, for example, the configuration information includes the value of n. Alternatively, the configuration information may indicate the value of n in an implicit manner, for example, the configuration information indirectly configures the value of n by configuring the number of reference signal resources. For example, if the configuration information configures 3 reference signal resources, the value of n is 3. It can be understood that, this embodiment of the present application does not limit what information the configuration information specifically includes to indicate the value of n. In addition, the foregoing configuration information may be the second indication information, or may be other information, which is not limited in this embodiment of the present application.

Optionally, the n time units may be continuous or discontinuous. Exemplarily, taking the time unit as an OFDM symbol as an example, it is assumed that n is 3, and the n time units are OFDM symbol #1, OFDM symbol #2, and OFDM symbol #3; OFDM symbol #3, OFDM symbol #5.

As an implementation manner, the second indication information may be carried in codebook indication information, where the codebook indication information is used to indicate a codebook type used by the terminal. Optionally, the codebook type includes a type I codebook, a type II codebook, and the time-frequency space codebook provided by the embodiment of the present application. It can be understood that, if the codebook indication information carries the second indication information, the codebook indication information is used to instruct the terminal to use the time-frequency space codebook.

Optionally, the second indication information may be carried in RRC signaling, MAC CE signaling or DCI.

Based on the technical solution shown in FIG. 6 , the network device sends the second indication information to the terminal to trigger the terminal to adopt the preset channel state information feedback mode, so that the terminal can feed back the channel state information based on n time units and ensure that the network The precoding matrix (or precoding vector) used by the device can match the channel of the terminal that changes over time, so as to ensure normal communication between the network device and the terminal.

Optionally, as shown in FIG. 7, before step S101, the method may further include step S301.

S301. A network device sends reference signal resource configuration information to a terminal.

The reference signal resource configuration information is used to configure reference signal resources. The reference signal resource configuration information may be carried in RRC signaling, MAC CE signaling or DCI.

In this embodiment of the present application, the reference signal resource may be a CSI-RS resource, and the reference signal resource set may be a CSI-RS resource set. The reference signal resource configuration information may be the aforementioned CSI reporting setting, or some information elements in the aforementioned CSI reporting setting.

Optionally, the reference signal resource configuration information includes at least one of the following situations:

Scenario 1: The reference signal resource configuration information is used to configure multiple reference signal resource sets, and the multiple reference signal resource sets correspond to different time units. That is, one reference signal resource set corresponds to one time unit. In this way, if the two reference signal resources belong to different reference signal resource sets, the two reference signal resources correspond to different time units. If the two reference signal resources belong to the same reference signal resource set, the two reference signal resources correspond to the same time unit.

Scenario 2: The reference signal resource configuration information is used to configure a reference signal resource set, where the reference signal resource set includes multiple reference signal resources, and the multiple reference signal resources correspond to different time units.

It can be understood that the multiple reference signal resources correspond to different time units, which specifically means that the configurations of the multiple reference signal resources on the time domain resources are different. For example, multiple reference signal resources in the same reference signal resource set may be configured with the same time-domain start symbol and different time-domain offset values.

It should be noted that the time domain resource corresponding to the reference signal resource may be determined by the time domain start symbol and the time domain offset value. The time domain offset value is used to indicate the difference between the time domain resource corresponding to the reference signal resource and the time domain start symbol. For example, if the time domain starting symbol is OFDM symbol #1, and the time domain offset value is 3, the time domain resource corresponding to the reference signal resource is OFDM#4.

In this embodiment of the present application, the reference signal resource configuration information may also be used to configure the time domain behavior of CSI reporting.

If the time-domain behavior of CSI reporting is periodic or semi-persistent, in case 1, the number of reference signal resource sets configured by the reference signal resource configuration information is equal to n, that is, the number of reference signal resource sets configured by the reference signal resource configuration information is equal to n. The number of reference signal resource sets is equal to the number of time units for which the terminal needs to perform reference signal measurement. In this way, for each reference signal resource set in the n reference signal resource sets, the terminal can select one or more reference signal resources from the reference signal resource set to perform reference signal reception and measurement.

If the time-domain behavior of CSI reporting is periodic or semi-persistent, for case 2, the number of reference signal resource sets configured by the reference signal resource is equal to 1, and the reference signal resource set included in the reference signal resource set is equal to 1. The number is equal to n. In this way, the terminal can receive and measure the reference signal on the n reference signal resources included in the reference signal resource set.

If the time-domain behavior of CSI reporting is aperiodic, for scenario 1, the number of reference signal resource sets configured by the reference signal resources is greater than or equal to n, that is, the number of reference signal resource sets configured by the reference signal resource configuration information. It is greater than or equal to the number of time units that the terminal needs to measure the reference signal. Optionally, in this case, the network device may send trigger information to the terminal to indicate the identifiers of n reference signal resource sets for CM. In this way, for each reference signal resource set in the n reference signal resource sets, the terminal can select one or more reference signal resources from the reference signal resource set to perform reference signal reception and measurement.

If the time-domain behavior of CSI reporting is aperiodic, for case 2, the number of reference signal resource sets configured by the reference signal resources is greater than or equal to 1, and the number of reference signal resources included in each reference signal resource set is greater than or equal to n. Optionally, in this case, the network device may send trigger information to the terminal to indicate the identifier of the reference signal resource set for the CM. Therefore, the terminal can select n reference signal resources from the reference signal resource set indicated by the trigger information to receive and measure the reference signal.

Optionally, the trigger information may also be used to indicate n reference signal resources for CM. In this case, the terminal can receive and measure the reference signal by using the n reference signal resources indicated by the trigger information.

It should be noted that the trigger information may also be used to indicate the identifier of the reference signal resource set used for IM.

The above trigger information may be a CSI Trigger State (CSI Trigger State) field, and the CSI TriggerState field may be carried in the DCI.

Based on the technical solution shown in FIG. 7 , the network device configures reference signal resources of multiple time units for the terminal by sending the reference signal resource configuration information to the terminal, so that the terminal can measure the reference signals of multiple time units, so as to determine the reference signal resources based on multiple time units. channel state information for each time unit.

The foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspective of interaction between each network element. It can be understood that, each network element, such as a network device and a terminal, in order to implement the above-mentioned functions, it includes corresponding hardware structures and/or software modules for performing each function. Those skilled in the art should easily realize that, in conjunction with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in hardware, or in a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In this embodiment of the present application, the network device and the terminal may be divided into functional modules according to the foregoing method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. . The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation. The following is an example of dividing each function module corresponding to each function to illustrate:

FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present application. As shown in FIG. 8 , the terminal includes a communication module 801 and a processing module 802 . The communication module 801 is used to support the terminal to perform step S102 in FIG. 4 , step S201 in FIG. 6 , step S301 in FIG. 7 , and/or other processes for the technical solutions described herein. The processing module 802 is used to support the terminal to perform step S101 in FIG. 4 , and/or other processes used in the technical solutions described herein. All relevant contents of the steps involved in the foregoing method embodiments can be cited in the functional descriptions of the corresponding functional modules, which will not be repeated here.

As an example, in conjunction with the terminal shown in FIG. 2 , the communication module 801 in FIG. 8 may be implemented by the transceiver 103 in FIG. 2 , the processing module 802 in FIG. 8 may be implemented by the processor 101 in FIG. 2 , This embodiment of the present application does not impose any limitation on this.

Embodiments of the present application further provide a computer-readable storage medium, where computer instructions are stored in the computer-readable storage medium; when the computer-readable storage medium runs on the terminal shown in FIG. 2 , the terminal is made to execute The method shown in Figure 4, Figure 6 and Figure 7. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or data storage devices including one or more servers, data centers, etc. that can be integrated with the medium. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media, or semiconductor media (eg, solid state disks (SSDs)), and the like.

An embodiment of the present application further provides a chip, the chip includes a processing module and a communication interface, the communication interface is used to transmit a received code instruction to the processing module, and the code instruction may be from a memory inside the chip or from the chip An external memory or other device, the processing module is configured to execute code instructions to support the terminal to execute the methods shown in FIG. 4 , FIG. 6 and FIG. 7 . The processing module is a processor, a microprocessor or an integrated circuit integrated on the chip. The communication interface can be an input-output circuit or a transceiver pin.

Embodiments of the present application also provide a computer program product containing computer instructions, which, when run on the terminal shown in FIG. 2 , enables the terminal to execute the methods shown in FIGS. 4 , 6 and 7 .

The terminal, computer storage medium, chip, and computer program product provided by the above-mentioned embodiments of the present application are all used to execute the method provided above. Therefore, for the beneficial effects that can be achieved, refer to the beneficial effects corresponding to the methods provided above. , and will not be repeated here.

FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown in FIG. 9 , the network device includes a communication module 901 and a processing module 902 . The communication module is used to support the network device to perform step S102 in FIG. 4 , step S201 in FIG. 6 , step S301 in FIG. 7 , and/or other processes for the technical solutions described herein. The processing module 902 is configured to support the network device to perform step S104 in FIG. 4 , and/or other processes for the technical solutions described herein. All relevant contents of the steps involved in the foregoing method embodiments can be cited in the functional descriptions of the corresponding functional modules, which will not be repeated here.

As an example, in conjunction with the network device shown in FIG. 2 , the communication module 901 in FIG. 9 may be implemented by the transceiver 203 in FIG. 2 , and the processing module 902 in FIG. 9 may be implemented by the processor 201 in FIG. 2 , the embodiments of the present application do not impose any limitation on this.

Embodiments of the present application further provide a computer-readable storage medium, where computer instructions are stored in the computer-readable storage medium; when the computer-readable storage medium runs on the network device shown in FIG. 2, the network The device performs the methods shown in FIGS. 4 , 6 and 7 . The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or data storage devices including one or more servers, data centers, etc. that can be integrated with the medium. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media, or semiconductor media (eg, solid state drives), and the like.

An embodiment of the present application further provides a chip, the chip includes a processing module and a communication interface, the communication interface is used to transmit a received code instruction to the processing module, and the code instruction may be from a memory inside the chip or from the chip An external memory or other device, the processing module is configured to execute code instructions to support the network device to execute the methods shown in FIG. 4 , FIG. 6 and FIG. 7 . The processing module is a processor, a microprocessor or an integrated circuit integrated on the chip. The communication interface can be an input-output circuit or a transceiver pin.

Embodiments of the present application also provide a computer program product containing computer instructions, which, when running on the network device shown in FIG. 2 , enables the network device to execute the methods shown in FIGS. 4 , 6 and 7 .

The network devices, computer storage media, chips, and computer program products provided by the above embodiments of the present application are all used to execute the methods provided above. Therefore, for the beneficial effects that can be achieved, reference may be made to the beneficial effects corresponding to the methods provided above. The effect will not be repeated here.

Although the application has been described herein in conjunction with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that these measures cannot be combined to advantage.

Although the application has been described in conjunction with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made therein without departing from the spirit and scope of the application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined by the appended claims, and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of this application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims (33)

1. an information feedback method, is characterized in that, described method comprises: Generate first indication information, where the first indication information is used to indicate the M time-frequency space units and the weighting coefficients of the M time-frequency space units; one time-frequency space unit is based on a time-domain basis vector, a frequency-domain basis The vector and a space domain basis vector are determined, and M is a positive integer; the time domain basis vector is used to characterize the variation law of the channel in the time domain; Send the first indication information. 2. The information feedback method according to claim 1, wherein, The first indication information is used to indicate the indices of the M time-frequency space units in the time-frequency space unit set; or, The first indication information is used to indicate the indices of the M time-frequency-space units in the time-frequency-space unit subset. 3. The information feedback method according to claim 1, wherein, The first indication information is used to indicate L spatial domain basis vectors, K time domain basis vectors, and N frequency domain basis vectors; or, The first indication information is used to indicate L space-domain basis vectors and X ₁ time-frequency units; a time-frequency unit is determined by a time-domain basis vector and a frequency-domain basis vector; or, The first indication information is used to indicate K time-domain basis vectors and X ₂ space-frequency units; a space-frequency unit is determined by a space-domain basis vector and a frequency-domain basis vector; or, The first indication information is used to indicate N frequency-domain basis vectors and X ₃ space-time units; a space-time unit is determined by a time-domain basis vector and a space-domain basis vector; Wherein, L, K, N, X ₁ , X ₂ and X ₃ are all positive integers. 4. The information feedback method according to any one of claims 1 to 3, wherein before generating the indication information, further comprising: receiving second indication information, where the second indication information is used to configure a preset channel state information feedback mode; If the terminal adopts the preset channel state information feedback mode, it detects reference signals of n time units to determine channel state information, where the channel state information includes the first indication information, and n is an integer greater than 1. 5 . The information feedback method according to claim 4 , wherein the second indication information is carried in codebook indication information, and the codebook indication information is used to indicate a codebook type used by the terminal. 6 . 6. The information feedback method according to claim 4 or 5, wherein the second indication information is further used to indicate the value of n. 7. The information feedback method according to any one of claims 1 to 6, wherein the method further comprises: Receive reference signal resource configuration information, where the reference signal resource configuration information is used to configure a reference signal resource set, where the reference signal resource set includes multiple reference signal resources, and the multiple reference signal resources correspond to different time units. 8. The information feedback method according to any one of claims 1 to 6, wherein the method further comprises: Receive reference signal resource configuration information, where the reference signal resource configuration information is used to configure multiple reference signal resource sets, where the multiple reference signal resource sets correspond to different time units. 9. An information feedback method, characterized in that the method comprises: Receive first indication information, where the first indication information is used to indicate the M time-frequency space units and the weighting coefficients of the M time-frequency space units; one time-frequency space unit is based on a time-domain basis vector, a frequency-domain basis The vector and a space domain basis vector are determined, and M is a positive integer; the time domain basis vector is used to characterize the variation law of the channel in the time domain; According to the first indication information, the M time-frequency space units and the weighting coefficients of the M time-frequency space units are determined. 10. The information feedback method according to claim 9, wherein, The first indication information is used to indicate the indices of the M time-frequency space units in the time-frequency space unit set; or, The first indication information is used to indicate indices of the M time-frequency space units in the subset of the time-frequency space unit set. 11. The information feedback method according to claim 9, wherein, The first indication information is used to indicate L spatial domain basis vectors, K time domain basis vectors, and N frequency domain basis vectors; or, The first indication information is used to indicate L space-domain basis vectors and X ₁ time-frequency units; a time-frequency unit is determined by a time-domain basis vector and a frequency-domain basis vector; or, The first indication information is used to indicate K time-domain basis vectors and X ₂ space-frequency units; a space-frequency unit is determined by a space-domain basis vector and a frequency-domain basis vector; or, The first indication information is used to indicate N frequency-domain basis vectors and X ₃ space-time units; a space-time unit is determined by a time-domain basis vector and a space-domain basis vector; Wherein, L, K, N, X ₁ , X ₂ and X ₃ are all positive integers. 12. The information feedback method according to any one of claims 9 to 11, wherein the method further comprises: Send second indication information, where the second indication information is used to configure a preset channel state information feedback mode; the preset channel state information feedback mode is used to instruct the terminal to detect reference signals of n time units and determine the channel state information; the channel state information includes the first indication information, and n is an integer greater than 1. The information feedback method according to claim 12, wherein the second indication information is carried in codebook indication information, and the codebook indication information is used to indicate a codebook type used by the terminal. The information feedback method according to claim 12 or 13, wherein the second indication information is further used to indicate the value of n. 15. The information feedback method according to any one of claims 9 to 14, wherein the method further comprises: Reference signal resource configuration information is sent, where the reference signal resource configuration information is used to configure a reference signal resource set, where the reference signal resource set includes multiple reference signal resources, and the multiple reference signal resources correspond to different time units. 16. The information feedback method according to any one of claims 9 to 14, wherein the method further comprises: Sending reference signal resource configuration information, where the reference signal resource configuration information is used to configure multiple reference signal resource sets, where the multiple reference signal resource sets correspond to different time units. 17. A terminal, characterized in that, comprising: a processing module, configured to generate first indication information, where the first indication information is used to indicate M time-frequency space units and weighting coefficients of the M time-frequency space units; one time-frequency space unit is based on a time-domain basis vector , a frequency-domain basis vector and a space-domain basis vector are determined, and M is a positive integer; the time-domain basis vector is used to characterize the variation law of the channel in the time domain; A communication module, configured to send the first indication information. 18. The terminal according to claim 17, wherein, The first indication information is used to indicate the indices of the M time-frequency space units in the time-frequency space unit set; or, The first indication information is used to indicate indices of the M time-frequency space units in the subset of the time-frequency space unit set. 19. The terminal according to claim 17, wherein, The first indication information is used to indicate L spatial domain basis vectors, K time domain basis vectors, and N frequency domain basis vectors; or, The first indication information is used to indicate L space-domain basis vectors and X ₁ time-frequency units; a time-frequency unit is determined by a time-domain basis vector and a frequency-domain basis vector; or, The first indication information is used to indicate K time-domain basis vectors and X ₂ space-frequency units; a space-frequency unit is determined by a space-domain basis vector and a frequency-domain basis vector; or, The first indication information is used to indicate N frequency-domain basis vectors and X ₃ space-time units; a space-time unit is determined by a time-domain basis vector and a space-domain basis vector; Wherein, L, K, N, X ₁ , X ₂ and X ₃ are all positive integers. 20. The terminal according to any one of claims 17 to 19, wherein, The communication module is further configured to receive second indication information, where the second indication information is used to configure a preset channel state information feedback mode; The processing module is further configured to detect reference signals of n time units and determine channel state information if a preset channel state information feedback mode is adopted, where the channel state information includes the first indication information, and n is greater than or equal to An integer of 1. The terminal according to claim 20, wherein the second indication information is carried in codebook indication information, and the codebook indication information is used to indicate a codebook type used by the terminal. 22. The terminal according to claim 20 or 21, wherein the second indication information is further used to indicate the value of n. 23. The terminal according to any one of claims 17 to 22, wherein, The communication module is further configured to receive reference signal resource configuration information, where the reference signal resource configuration information is used to configure a reference signal resource set, where the reference signal resource set includes a plurality of reference signal resources, the plurality of reference signal resources corresponding to different time units. 24. The terminal according to any one of claims 17 to 22, wherein, The communication module is further configured to receive reference signal resource configuration information, where the reference signal resource configuration information is used to configure multiple reference signal resource sets, and the multiple reference signal resource sets correspond to different time units. 25. A network device, comprising: A communication module, receiving first indication information, where the first indication information is used to indicate M time-frequency space units and weighting coefficients of the M time-frequency space units; one time-frequency space unit is based on a time-domain basis vector, a The frequency domain base vector and a space domain base vector are determined, and M is a positive integer; the time domain base vector is used to characterize the variation law of the channel in the time domain; The processing module determines the M time-frequency space units and the weighting coefficients of the M time-frequency space units according to the first indication information. 26. The network device according to claim 25, wherein, The first indication information is used to indicate the indices of the M time-frequency space units in the time-frequency space unit set; or, The first indication information is used to indicate the indices of the M time-frequency-space units in the time-frequency-space unit subset. 27. The network device according to claim 25, wherein, The first indication information is used to indicate L spatial domain basis vectors, K time domain basis vectors, and N frequency domain basis vectors; or, The first indication information is used to indicate L space-domain basis vectors and X ₁ time-frequency units; a time-frequency unit is determined by a time-domain basis vector and a frequency-domain basis vector; or, The first indication information is used to indicate K time-domain basis vectors and X ₂ space-frequency units; a space-frequency unit is determined by a space-domain basis vector and a frequency-domain basis vector; or, The first indication information is used to indicate N frequency-domain basis vectors and X ₃ space-time units; a space-time unit is determined by a time-domain basis vector and a space-domain basis vector; Wherein, L, K, N, X ₁ , X ₂ and X ₃ are all positive integers. 28. The network device according to any one of claims 25 to 27, wherein, The communication module is further configured to send second indication information, where the second indication information is used to configure a preset channel state information feedback mode; the preset channel state information feedback mode is used to instruct the terminal to detect n times The reference signal of the unit determines the channel state information; the channel state information includes the first indication information, and n is an integer greater than 1. 29. The network device according to claim 28, wherein the second indication information is carried in codebook indication information, and the codebook indication information is used to indicate a codebook type used by the terminal. 30. The network device according to claim 28 or 29, wherein the second indication information is further used to indicate the value of n. 31. The network device according to any one of claims 25 to 30, wherein, The communication module is further configured to send reference signal resource configuration information, where the reference signal resource configuration information is used to configure a reference signal resource set, where the reference signal resource set includes a plurality of reference signal resources, the plurality of reference signal resources corresponding to different time units. 32. The network device according to any one of claims 25 to 30, wherein, The communication module is further configured to send reference signal resource configuration information, where the reference signal resource configuration information is used to configure multiple reference signal resource sets, and the multiple reference signal resource sets correspond to different time units. 33. A computer-readable storage medium, characterized in that the computer-readable storage medium stores instructions that, when the instructions are executed on the communication device, cause the communication device to perform the functions described in any one of claims 1 to 8. the method described, or cause the communication device to execute the method described in any one of claims 9 to 16.

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