WO2020156103A1

WO2020156103A1 - Information feedback method and device

Info

Publication number: WO2020156103A1
Application number: PCT/CN2020/071535
Authority: WO
Inventors: 金黄平; 任翔; 王潇涵; 韩玮; 吴晔; 毕晓艳
Original assignee: 华为技术有限公司
Priority date: 2019-01-30
Filing date: 2020-01-10
Publication date: 2020-08-06
Also published as: CN111510189A; CN113965232B; CN111510189B; CN113965232A

Abstract

The present invention relates to the technical field of communications. Provided are an information feedback method and device capable of solving the problem in the art in which channel state information fed back by a moving terminal is not accurate. The method comprises: a terminal generating first indication information, the first indication information indicating M time-frequency-space units and weighting coefficients corresponding thereto, wherein a time-frequency-space unit is determined according to a time domain based vector, a frequency domain based vector and a space domain based vector; and the terminal sending the first indication information to a network apparatus. The present invention is applicable to a channel detection process.

Description

Information feedback method and device

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office, the application number is 201910094033.X, and the application name is "information feedback method and device" on January 30, 2019. The entire content is incorporated into this application by reference. in.

Technical field

This application relates to the field of communication technology, and in particular to information feedback methods and devices.

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 a significant improvement in spectrum efficiency by using large-scale antennas. The accuracy of channel state information (CSI) acquired by network equipment determines the performance of Massive MIMO to a large extent. In a frequency division duplex (FDD) system or a time division duplex (TDD) system where channel disparity cannot be well satisfied, a codebook is usually used to quantify CSI. Therefore, codebook design is a key issue of Massive MIMO.

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

Currently, based on the codebook defined by the R15 protocol or the R16 protocol, channel state information can only characterize 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 applicable to the terminal in a mobile state.

In order to achieve the above purpose, this application adopts the following technical solutions:

In a first aspect, an information feedback method is provided, including: a terminal generates first indication information, 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 instruction information to the network device. Based on the above technical solution, since each of 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, the time-domain basis vector It can characterize the change rule of the channel in the time domain, so the time-frequency space unit can also characterize the change rule of the channel in the time domain. Therefore, the precoding matrix (or precoding vector) determined by the M time-frequency-space units and the M weighting coefficients indicated by the first indication information can match the channel that the terminal changes over time, ensuring that the network equipment and the terminal Normal communication between.

In a possible design, the first indication information is used to indicate the indexes 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.

In a possible design, the first indication information is used to indicate L spatial basis vectors, K time domain basis vectors, and N frequency domain basis vectors; or, the first indication information is used to indicate L spatial basis vectors and X ₁ time-frequency units; or, the first indication information is used to indicate K time-domain base vectors and X ₂ space-frequency units; or, the first indication information is used to indicate N frequency-domain base vectors and X ₃ Space-time units. 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 The vector is 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 the second indication information, the second indication information is used to configure the preset channel state information feedback mode; if the terminal uses the preset channel state information In the feedback mode, the terminal detects the reference signals of n time units to determine the channel state information, 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, ensuring that the precoding matrix (or precoding vector) used by the network device can match the channel that the terminal changes over time, and ensuring normality 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. Among them, the codebook types include type I codebook, type II codebook, and 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 indicates that the terminal uses 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 receives first indication information, the first indication information is used to indicate M time-frequency-space units and weighting coefficients of M time-frequency-space units; one time-frequency-space unit 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 weighting coefficients of M time-frequency-space units and M time-frequency-space units according to the first indication information. Based on the above technical solution, since each of 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, the time-domain basis vector It can characterize the change rule of the channel in the time domain, so the time-frequency space unit can also characterize the change rule of the channel in the time domain. Therefore, the precoding matrix (or precoding vector) determined by the M time-frequency-space units and the M weighting coefficients indicated by the first indication information can match the channel that the terminal changes over time, ensuring that the network equipment and the terminal Normal communication between.

In a possible design, the first indication information is used to indicate the indexes 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 method further includes: sending second indication information, 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, the reference signal resource set includes multiple reference signal resources, multiple reference signal resources Correspond 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. The first indication information is used to indicate M time-frequency-space units and weighting coefficients of M time-frequency-space units; a time-frequency-space unit is based on a time-domain basis vector and a frequency domain The basis vector and a spatial basis vector are determined, and M is a positive integer. The communication module is used to send the first instruction information.

In a possible design, the communication module is further configured to receive second indication information, and 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 to determine channel state information if a preset channel state information feedback mode is adopted. The channel state information includes first indication information, and n is an integer greater than 1.

In a possible design, the communication module is also used 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, which correspond to multiple reference signal resources. Different time units.

In a possible design, the communication module is also used to receive reference signal resource configuration information, and 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, including: a processor and a memory, the processor is configured to read instructions in the memory, and implement the information feedback method according to the first aspect according to the instructions.

In a fifth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores instructions that, when run on a communication device, enable the communication device to execute the information feedback method described in the first aspect.

In a sixth aspect, a computer program product containing instructions is provided, which when running on a communication device, enables the communication device to execute the information feedback method described in the first aspect.

In a seventh aspect, a chip is provided. The chip includes a processing module and a communication interface. The communication interface is used to receive an input signal and provide it to the processing module, and/or to output a signal generated by the processing module. Perform the information feedback method described in the first aspect above. In an 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 the internal memory of the chip or the external memory of the chip. Optionally, the processing module may be a processor, microprocessor, or integrated circuit integrated on the chip. The communication interface can be an input/output circuit or transceiver pins on the chip.

Among them, the technical effects brought by any of the design methods of the third aspect to the seventh aspect can be referred to the beneficial effects of the corresponding method provided above, which are the same as the technical effects brought about by the design method, and 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. The first indication information is used to indicate M time-frequency-space units and weighting coefficients of M time-frequency-space units; a time-frequency-space unit is based on a time-domain basis vector and a frequency-domain basis vector And a spatial basis vector, M is a positive integer. The processing module determines the weighting coefficients of M time-frequency space units and M time-frequency space units according to the first indication information.

In a possible design, the communication module is also used to send second indication information, 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 communication module is also used 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, which correspond to multiple reference signal resources. Different time units.

In a possible design, the communication module is also used to send reference signal resource configuration information. 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 ninth aspect, a communication device is provided, including: a processor and a memory, and the processor is configured to read instructions in the memory and implement the information feedback method according to the second aspect according to the instructions.

In a tenth aspect, a computer-readable storage medium is provided, and the computer-readable storage medium stores instructions that, when run on a communication device, enable the communication device to execute the information feedback method described in the second aspect.

In an eleventh aspect, a computer program product containing instructions is provided, which when running on a communication device, enables the communication device to execute the information feedback method described in the second aspect.

In a twelfth aspect, a chip is provided. The chip includes a processing module and a communication interface. The communication interface is used to receive the input signal and provide it to the processing module, and/or to output the signal generated by the processing module. To implement the information feedback method described in the second aspect. In an 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 the internal memory of the chip or the external memory of the chip. Optionally, the processing module may be a processor, microprocessor, or integrated circuit integrated on the chip. The communication interface can be an input/output circuit or transceiver pins on the chip.

Among them, the technical effects brought by any one of the eighth aspect to the twelfth aspect can refer to the beneficial effects of the corresponding method provided above and the technical effects brought by the design method, which will not be omitted here. Repeat.

In a thirteenth aspect, a communication system is provided. The communication system includes a terminal and a network device. The terminal is used to execute the information feedback method described in the first aspect. The network device is used to execute the information feedback method described in the second aspect.

Description of the drawings

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

FIG. 2 is a schematic structural diagram of a terminal and network equipment provided by an embodiment of this application;

FIG. 3 is a schematic diagram of an antenna array provided by an embodiment of the application;

FIG. 4 is a first flowchart of an information feedback method provided by an embodiment of this application;

FIG. 5 is a schematic diagram of a set of time-frequency-space units provided by an embodiment of this application;

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

FIG. 7 is a third flowchart of an information feedback method provided by an embodiment of this application;

FIG. 8 is a schematic structural diagram of a terminal provided by an embodiment of this application;

FIG. 9 is a schematic structural diagram of a network device provided by an embodiment of this application.

detailed description

In the description of this application, unless otherwise specified, "/" means "or". For example, A/B can mean A or B. The "and/or" in this article is only an association relationship describing the associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone These three situations. In addition, "at least one" means one or more, and "plurality" means two or more. The words "first" and "second" do not limit the quantity and order of execution, and the words "first" and "second" do not limit the difference.

It should be noted that in this application, words such as "exemplary" or "for example" are used as examples, illustrations, or illustrations. Any embodiment or design solution described as "exemplary" or "for example" in this application should not be construed as being more preferable or advantageous than other embodiments or design solutions. To be precise, words such as "exemplary" or "for example" are used to present 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 multiple communication convergence systems, etc., and can also be applied to existing communication systems. The application scenarios of the technical solutions provided by this application may include multiple, for example, machine to machine (M2M), macro and micro communications, enhanced mobile broadband (eMBB), ultra-high reliability and ultra-low Scenarios such as ultra-reliable&low latency communication (uRLLC) and massive IoT communication (massive machine type communication, mMTC). These scenarios may include, but are not limited to: a communication scenario between a terminal and a terminal, a communication scenario between a network device and a network device, a communication scenario between a network device and a terminal, and so on. In the following descriptions, the technical solutions of the present application are applied to the scenarios of network equipment and terminal communication as examples.

In addition, the network architecture and business scenarios described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. Those of ordinary skill in the art will know that With the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

FIG. 1 is a schematic diagram of the architecture of a communication system to which the technical solution of this application is applicable. 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 this 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: micro base stations (also called small stations), macro base stations, relay stations, access points, etc., which are not specifically limited in the embodiment of the present application. In the embodiment of this application, the base station may be a base station (BTS) in the global system for mobile communication (GSM), code division multiple access (CDMA), and broadband The base station (node B) in wideband code division multiple access (WCDMA), the evolutional node B (eNB or e-NodeB) in the long term evolution (LTE), the Internet of Things ( eNB in internet of things (IoT) or narrowband-internet of things (NB-IoT), base station in future 5G mobile communication network or future evolution of public land mobile network (PLMN) The embodiment of this application does not impose any restriction on this.

The terminal is used to provide users with voice and/or data connectivity services. 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 equipment, wireless communication equipment, terminal agent Or terminal devices, 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 the embodiment of the present application. For example, the handheld device may be a smart phone. The vehicle-mounted device may be a vehicle-mounted navigation system. The wearable device may be a smart bracelet or a virtual reality (VR) device. The computer can be a personal digital assistant (PDA) computer, a tablet computer, and a laptop computer.

FIG. 2 is a schematic diagram of the hardware structure of a network device and a terminal provided by an embodiment of the 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 (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs for controlling the execution of the program of this application. integrated circuit. The processor 101 may also include multiple CPUs, and the processor 101 may be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor. The processor here may refer to one or more devices, circuits, or processing cores for processing data (for example, computer program instructions).

The memory 102 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions The dynamic storage device can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, optical disc storage (Including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer The embodiments of this application do not impose any restrictions on any other media that can be accessed. The memory 102 may exist independently and is connected to the processor 101 through a bus. The memory 102 may also be integrated with the processor 101. The memory 102 is used to store application program codes for executing the solutions of the present application, and the processor 101 controls the execution. The processor 101 is configured to execute the computer program code stored in the memory 102, so as to implement the method provided in the embodiment of the present application.

The transceiver 103 can use any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. . 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 communicates with the processor 101 and can receive user input in various ways. For example, the input device 105 may be a mouse, a keyboard, a touch screen device, or a sensor device.

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 to the core network device through a link (for example, the S1 interface), or to connect to the network interface of other network devices through a wired or wireless link (for example, the X2 interface) (not shown in the figure), The embodiments of this application do not specifically limit this. In addition, for the relevant 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, which will not be repeated here.

In order to facilitate the understanding of the embodiments of the present application, the following descriptions are made first.

First, the meaning of the main parameters involved in the embodiments of this application:

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

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

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

(4) F: base vector in frequency domain. Exemplarily, in a two-dimensional coordinate system, F can be transformed into

In the three-dimensional coordinate system, F can be transformed into

(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 transformed into

(6) S: airspace basis vector. Exemplarily, in a two-dimensional coordinate system, S can be transformed into

In the three-dimensional coordinate system, S can be transformed into

Second, the meaning of the operation symbols in the formulas involved in the embodiments of this application:

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

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

(3)

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

(4)

Represents the Kronecker product. The specific definition of Kronecker product can refer to the prior art, so I won't repeat it here.

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

(6)

Indicates rounding up.

Third, in the embodiments of the present application, any vector (for example, spatial-domain basis vector, frequency-domain basis vector, time-domain basis vector, etc.) is described as an example in which all vectors are column vectors. It can be understood that in 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 based on the technical solutions provided in this application without creative work, and the corresponding technical solutions will not be described herein. Furthermore, 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 various methods mentioned above The combination of and other ways. Therefore, the foregoing various speculations and adjustments should be understood as falling within the scope of the embodiments of the present application.

Fourth, in this embodiment, for ease of description, when referring to numbering, the numbering can 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, and will not be illustrated one by one here. Of course, the specific implementation is not limited to this, for example, the serial number may also start from 1. It should be understood that the above descriptions are all settings for 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 the embodiments of the present application, "used to indicate" may include used for direct indication and used for indirect indication. For example, when describing that a certain indication information is used to indicate information I, the indication information may directly indicate I or indirectly indicate I, but it does not mean that I must be carried in the indication information.

The information indicated by the instruction information is called the information to be instructed. 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 instructed itself or the Indicating information index etc. The information to be indicated can also be indicated indirectly 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, it is also possible to realize the indication of specific information by means of the pre-arranged (for example, stipulated by the agreement) order of the various information, thereby reducing the indication overhead to a certain extent. At the same time, it can also identify the common parts of each information and uniformly indicate, so as to reduce the instruction overhead caused by separately indicating the same information. For example, those skilled in the art should understand that the 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 attributes.

In addition, the specific indication manner may also be various existing indication manners, such as but not limited to the foregoing indication manner and various combinations thereof. For the specific details of the various indication methods, reference may be made to the prior art, which will not be repeated here. It can be seen from the above that, for example, when multiple pieces of information of the same type need to be indicated, there may be situations where different information is indicated in different ways. In the specific implementation process, the required instruction method can be selected according to specific needs. The embodiment of the application does not limit the selected instruction method. As a result, the instruction method involved in the embodiment of the application should be understood to cover Various methods for obtaining information to be indicated.

In addition, the information to be indicated may have other equivalent forms. For example, a row vector can be expressed as a column vector, a matrix can be expressed by the transpose of the matrix, and a matrix can also be expressed in the form of a vector or an 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 in the form of the product of one vector and the transposed vector of another vector. 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 characteristics involved in the embodiments of the present application should be understood to cover various manifestations of the characteristics.

The information to be instructed can be sent together as a whole, or can be divided into multiple sub-information to be sent separately, and the sending period and/or sending timing of these sub-information can 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 pre-defined, for example, pre-defined according to a protocol, or configured by the transmitting end device by sending configuration information to the receiving end device. Wherein, the configuration information may include, but is 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 of them.

In order to facilitate the understanding of the technical solutions of the present application, some terms related to the embodiments of the present application are briefly introduced below.

1. Airspace basis vector

Each spatial basis vector can correspond to a transmitting beam of the transmitting end device.

The spatial basis vector is usually associated with the antenna array. For example, many parameters involved in the expression of the spatial basis vector can be understood to represent different attributes of the antenna array. Therefore, in order to facilitate the understanding of the space base vector involved in the embodiment of the present application, the space base vector will be described below in conjunction with an 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 specific antenna arrays. In a specific implementation process, a suitable antenna array can 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 can 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, which are arranged in a matrix. Specifically, each row of the matrix contains multiple vibrator groups 302, and each column contains multiple vibrator groups 302. Each vibrator group 302 includes two vibrators, which are a vibrator 304 working in the first polarization direction and a vibrator 306 working in the second polarization direction.

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

In the embodiment of the present application, the dimension of the spatial base vector is N _S , that is, a spatial base vector contains N _S elements. N _S may be the number of transmitting antenna ports of the transmitting end device in a polarization direction. N _S ≥2, N _S is an integer.

2. Frequency domain unit

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

3. Frequency domain basis vector

The frequency domain basis vector is used to characterize the changing law of the channel in the frequency domain. The frequency-domain basis vector can be specifically used to represent the change law of the weighting coefficient of each spatial-domain basis vector on each frequency-domain unit. The change rule represented by the frequency domain basis vector is related to factors such as multipath delay. It is understandable that when the signal is transmitted through the wireless channel, the signal may have different transmission delays on different transmission paths. The change 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 base vector is N _f , that is, a frequency domain base vector contains N _f elements.

Optionally, the dimension of the frequency domain base vector may be equal to the number of frequency domain units that need to be CSI measured. 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 vector is variable.

Optionally, the dimension of the frequency domain base vector may also be equal to the number of frequency domain units included in the available bandwidth of the terminal. Among them, 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 referred to as a partial bandwidth (bandwidth part, BWP), which is not limited in the 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 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 bandwidth (reporting band). The signaling may indicate the position and number of frequency domain units to be reported in the form of a bitmap, for example. Therefore, the dimension of the frequency domain base 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. The TI here can be a transmission time interval (TTI) in the LTE system, or a symbol-level short TTI, or A slot, mini-slot, or an orthogonal frequency division multiplexing (OFDM) symbol in the 5G system. The embodiment of this application does not limit this.

5. Time domain basis vector

The time-domain basis vector is used to characterize the changing law of the channel in the time domain. That is, the time-domain basis vector is used to characterize the time-varying nature of the channel. The time-varying nature of the channel means that the transfer function of the channel changes over time. The time-varying nature of the channel is related to factors such as Doppler shift.

In this embodiment of the application, the dimension of the time-domain basis vector is N _t , that is, a time-domain basis vector contains 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 the number of time units that need to be CSI measurement may be different in different scenarios, the dimensions of the time-domain basis vectors may also be different. In other words, the dimensionality of the time-domain basis vector is variable.

6. Time-frequency unit

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

The time-frequency matrix may be a matrix with a dimension of 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 a 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 in 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 also have other names, such as frequency-time vectors. The time-frequency matrix can also have other names, such as frequency-time matrix. The embodiments of this application do not specifically limit this.

7. Space frequency unit

A space-frequency unit is determined according to a space-domain basis vector and a frequency-domain basis vector. In the embodiment of the present application, the space frequency unit may be a space frequency matrix or a space frequency vector. It is understandable that the space-frequency matrix and the space-frequency vector can be converted mutually, 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 .

The space frequency matrix may be a matrix with a dimension of 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 can 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 in 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 can also have other names, such as the space-frequency unit. Similarly, space-frequency vectors can also have other names, such as frequency-space vectors. Space-frequency matrix can also have other names, such as frequency-space matrix. The embodiments of this application do not specifically limit this.

8. Space-time unit

The space-time unit is used to characterize the changing law of the channel in the two dimensions of the time domain and the space domain. A space-time unit is determined based on a time-domain basis vector and a space-domain basis vector. In the embodiment of the present application, the space-time unit may be a space-time matrix or a space-time vector. It is understandable 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-based basis vector, and the space-time matrix and the space-time vector can be converted to each other. Therefore, the space-time matrix and the space-time vector are equivalent.

The space-time matrix may be a matrix with a dimension of N _s ×N _t . Optionally, the space-time matrix can be determined by, but not limited to, any of the following formulas:

Among them, 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:

In addition, the space-time unit can also have other names, such as space-time unit. Similarly, space-time vectors can also have other names, such as space-time vectors. Space-time matrix can also have other names, such as space-time matrix. The embodiments of this application do not specifically limit this.

9. Time-frequency space unit

The time-frequency-space unit is used to characterize the change law of the channel in the three dimensions of time domain, frequency domain, and space domain. A time-frequency space unit is determined by a time-domain basis vector, a frequency-domain basis vector, and a space-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 is understandable that the time-frequency-space matrix and the time-frequency-space vector can be converted mutually, 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 ease 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 time-domain dimensions, frequency-domain dimensions, and spatial-domain dimensions 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 is N _t , the number of elements contained in the frequency domain is N _f , and the number of elements contained in the spatial dimension For: N _s . Optionally, the time-frequency-space matrix can be determined by but not limited to any of the following formulas:

among them,

Represents the 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:

Manner 1: The two dimensions of the time-frequency-space matrix can be referred to as the time-frequency dimension and the spatial dimension, respectively. Among them, the number of elements contained in the time-frequency space matrix in the time-frequency dimension is N _t N _f , and the number of elements contained in the spatial 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:

Manner 2: The two dimensions of the time-frequency-space matrix can be referred to as the space-time dimension and the frequency-domain dimension respectively. Among them, the number of elements contained in the space-time dimension of the time-frequency space matrix is N _t N _s , and the number of elements contained in the frequency domain dimension is N _f . The time-frequency space matrix can be expressed as

Manner 3: The two dimensions of the time-frequency-space matrix can be referred to as the space-frequency dimension and the time-domain dimension, respectively. Among them, the number of elements contained in the space-frequency dimension of the time-frequency space matrix is N _s N _f , and the number of elements contained in the time domain dimension is N _t . The time-frequency space matrix can be expressed as

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 a time-frequency space vector.

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

10. Time domain basis vector collection

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

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

Among them, O _t is a preset value, O _t is a positive integer, and 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 set of frequency-domain basis vectors are orthogonal.

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

Wherein, O _f is a preset value, O _f is a positive _{_{_{integer, 0≤m f ≤O f N f -1}}} . In a specific implementation process, O _f it may be understood as a dimension in the oversampled 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 spatial basis vector set are orthogonal.

The space basis vector in the space basis vector set can be expressed as:

Wherein, O _1, O ₂ is a preset value, O _1, O ₂ are positive _{_{_{integers, 0≤m 1 ≤O 1 N 1 -1,0≤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 spatial domain. N ₁ and N ₂ can be used to represent the number of vibrating element groups 302 in each row (or column) of vibrating element group 302 and the number of vibrating element groups 302 in each column (or row) of vibrating element group 302 in the antenna array 300 shown in FIG. 3 quantity.

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

The time-frequency unit set includes multiple time-frequency units. In 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 time-frequency vector set includes multiple time-frequency vectors, and the time-frequency matrix set includes multiple time-frequency matrices. Optionally, the time-frequency unit set may be preset or determined according to the time-domain base vector set and the frequency-domain base vector set.

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

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

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

14. Weighting factor

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

Optionally, the weighting coefficient fed back by the terminal to the network device is quantized 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 the magnitude of these weighting coefficients whose magnitude is zero or approximately zero is quantized, the quantized value may be zero. If the quantized value of the amplitude of the weighting coefficient is 0, the weighting coefficient can be called a weighting coefficient with a zero amplitude. Correspondingly, if the quantized value of the amplitude of the weighting coefficient is not 0, the weighting coefficient can be called a weighting coefficient with a non-zero amplitude.

15. Normalization and normalization coefficient

Before quantizing the weighting coefficients, each weighting coefficient can be normalized, that is, the absolute value of each weighting coefficient can be processed as a relative value with respect to the normalized 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 modulus).

The following takes the weighting coefficient with the largest amplitude among the multiple weighting coefficients as the normalized 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 as 0 or 2π; and 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 embodiment shown below, the normalization can be based on a polarization direction as a unit to determine the maximum weighting coefficient, or it can be based on a transmission layer (for example, one or more polarization directions on a transmission layer). The unit is used to determine the maximum weighting coefficient, and all the transmission layers can also be used as the unit to determine the maximum weighting coefficient. Therefore, normalization can be performed in different ranges for each polarization direction, each transmission layer, or all transmission layers. It should be understood that the unit of normalization is not limited to the above list, and this application does not limit it.

16. Reference signal, reference signal resource, reference signal resource collection

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

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

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

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

17. Channel state information (channel state information, CSI)

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

As shown in Fig. 4, an information feedback method provided by an embodiment of this application includes the following steps:

S101. The terminal generates first indication information.

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

In this embodiment of the application, the value of M is predefined, or the network device sends configuration information to the terminal to indicate it. 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 based on 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, configure The information can 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 can be indicated by different information. For example, the first information indicates the value of L, the second information indicates the value of K, and the third information indicates the value of N.

It is worth noting that the foregoing configuration information, first information, second information, and 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 ease of description, hereinafter, the information used to indicate M time-frequency-space units in the first indication information is called component information, and the information used to indicate the weighting coefficients of M time-frequency-space units is called coefficient information. That is, the first indication information includes: component information and coefficient information.

Optionally, the foregoing 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 the index of each of the M time-frequency-space units in the time-frequency-space unit set.

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

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

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 of M time-frequency-space units indicated by the component information is only

One of two combinations. This can be pre-set between the terminal and the network equipment

The index of each combination in the three combinations, so that the terminal feeds back the index of the M time-frequency-space unit combination, which enables the network device to determine the corresponding M time-frequency-space unit. It is understandable that in this case, the overhead of component information is

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

As the name implies, the subset of time-frequency space units is a subset of the set of time-frequency space units. The time-frequency-space unit set may include multiple time-frequency-space unit subsets. The network equipment and the terminal may preset the index of each time-frequency-space unit subset and the time-frequency-space unit included in each time-frequency-space unit subset. In this way, the terminal feeds back the index of the time-frequency-space unit subset to the network device, so that the network device can learn 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 equally divided into P time-frequency-space unit subsets, and each time-frequency-space unit subset includes Q ₁ time-frequency-space unit, Q =Q ₁ ×P. In this case, the overhead of component information is:

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

Assuming that the time-frequency-space unit set includes Q time-frequency-space units, the time-frequency-space unit set can be equally divided into P time-frequency-space unit subsets, and 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

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

It is understandable that, in this case, the overhead of component information is:

(5) The component information includes: a bitmap corresponding to the set of time-frequency-space units. Wherein, each q bit 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 the bit does not belong to the M time-frequency space units; If the value is "1", the time-frequency space unit corresponding to the 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: the index of the time-frequency-space unit subset and the bitmap corresponding to the time-frequency-space unit subset. 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 equally divided into P time-frequency-space unit subsets, and 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 above has carried out a specific analysis on the overhead of component information in various situations. In the following, the overhead of other information (such as spatial basis vector information, frequency domain basis vector information, etc.) can refer to the analysis of the above content, which is explained here in a unified manner, and will not be repeated below.

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

For ease of description, the information used to indicate the L spatial basis vectors in the component information is referred to as spatial basis vector information in the following abbreviation, 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 referred to as frequency domain basis vector information for short.

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

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

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

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

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

(5) The bitmap corresponding to the set of spatial basis vectors; wherein, each q bit in the bitmap corresponding to the set of spatial basis vectors corresponds to a spatial basis vector in the set of spatial basis vectors, and the value of the q bits is used to indicate Whether the corresponding airspace basis vector belongs to the L airspace basis vectors;

(6) The index of the spatial basis vector subset, and the bitmap corresponding to the spatial basis vector subset; among them, each q bit of the bitmap corresponding to the spatial basis vector subset corresponds to a spatial basis vector in the spatial basis vector subset, The value of the q bits is used to indicate whether the corresponding spatial base vector belongs to the L spatial base vectors.

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

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

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

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

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

(5) The bitmap corresponding to the time-domain basis vector set; where each q bit 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 q bits are taken The value is used to indicate whether the corresponding time-domain basis vector belongs to the K time-domain basis vectors;

(6) The index of the time-domain basis vector subset, and the bitmap corresponding to the time-domain basis vector subset; where each q bit in the bitmap corresponding to the time-domain basis vector subset corresponds to one of the time-domain basis vector subsets 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 of the N frequency domain basis vectors in the frequency domain basis 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 of the N frequency domain basis vectors in the frequency domain basis vector subset;

(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) The bitmap corresponding to the set of frequency-domain basis vectors; wherein, each q bit in the bitmap corresponding to the set of frequency-domain basis vectors corresponds to a frequency-domain basis vector in the set of frequency-domain basis vectors. The value is used to indicate whether the corresponding frequency domain basis vector belongs to the N frequency domain basis vectors;

(6) The index of the frequency domain basis vector subset, and the bitmap corresponding to the frequency domain basis vector subset; among them, each q bit in the bitmap corresponding to the frequency domain basis vector subset corresponds to one of the frequency domain basis vector subsets Frequency domain basis vector, the value of the q bits is used to indicate whether the corresponding frequency domain basis vector belongs to the N frequency domain basis vectors.

It should be noted that 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, and 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 content:

(1) The first bitmap, each q bits in the first bitmap corresponds to one of 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 M time-frequency space units in L×K×N time-frequency space units;

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

(4) The position of the spatial 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 is 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 base vectors and X ₁ time-frequency units. Among them, L and X ₁ are both positive integers. L and X ₁ are pre-defined or pre-configured by the network device. In the case of _a pre-configured by the network device L, X, L, X ₁ may be indicated by the same information may be indicated by different information, application of the present embodiment is not limited thereto.

For ease of description, the information used to indicate the L spatial base vectors in the component information is referred to as spatial base vector information for short, and the information used to indicate X ₁ time-frequency units in the component information is referred to as time-frequency unit information. It should be noted that the specific implementation of the spatial basis vector information can refer 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 X ₁ time-frequency unit in the time-frequency unit set;

(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 of the X ₁ time-frequency units in the time-frequency unit subset;

(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) The bitmap corresponding to the time-frequency unit set; wherein, each q bit in the bitmap corresponding to the time-frequency unit set corresponds to one 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; among them, each q bit 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 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, and 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) The second bitmap, each q bits in the second bitmap corresponds to one of the L×X ₁ time-frequency-space units, and the q bits are used to indicate the corresponding time 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 unit;

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

(4) The position of the spatial 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 at X ₁ time The position in the frequency unit.

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

For ease 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 the specific implementation of the time-domain basis vector information can refer 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 X ₂ space frequency units in the space frequency unit set;

(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 X ₂ space frequency units in the space frequency unit subset;

(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) The bitmap corresponding to the set of space frequency units; wherein, each q bit in the bitmap corresponding to the set of space frequency units corresponds to one space frequency unit in the set of space frequency units, 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; among them, each q bit 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 base 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, and the third position information is used to indicate the positions of M time-frequency space units in K×X ₂ time-frequency space units.

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

(1) The third bitmap, each q bits in the third bitmap corresponds to one of 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) Each of the M time-frequency-space units is the index of K×X ₂ time-frequency-space units;

(4) The position of the time-domain basis vector corresponding to each time-frequency-space unit among 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 The position in the space frequency unit.

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

For ease of description, the information used to indicate N frequency-domain basis vectors in the component information is referred to as frequency-domain basis vector information for short, and the information used to indicate X ₃ space-time units in the component information is referred to as spatio-temporal unit information. It should be noted that the specific implementation of the frequency-domain basis vector information can refer to the foregoing description, which will not be repeated here.

Optionally, the spatio-temporal unit information may include at least one of the following:

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

(2) The index of the combination of X ₃ spatiotemporal units in the spatiotemporal unit set;

(3) The index of the subset of spatio-temporal units, and the index of each spatio-temporal unit of the X ₃ spatio-temporal units in the subset of spatio-temporal units;

(4) The index of the subset of spatiotemporal units, and the index of the combination of X ₃ spatiotemporal units in the subset of spatiotemporal units;

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

(6) The index of the spatio-temporal unit subset and the bitmap corresponding to the spatio-temporal unit subset; among them, each bit in the bitmap corresponding to the spatio-temporal unit subset corresponds to a frequency domain basis vector in the spatio-temporal unit subset, and each bit is 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, each q bits in the fourth bitmap corresponds to one of 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) Each of the M time-frequency-space units is indexed in N×X ₃ 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 The position in the space-time unit.

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

It is understandable that, which method the terminal uses to implement the component information in Mode 1 to Mode 5 may be defined by a protocol, or determined by mutual negotiation between the terminal and the network device, or the network device may be pre-configured to Terminal, the embodiment of this application is not limited to this.

In this embodiment of the present application, the quantized values of the magnitudes of the weighting coefficients of the M time-frequency-space units are all non-zero. In other words, the weighting coefficients of the M time-frequency-space units are all weighting coefficients with a non-zero amplitude.

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

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

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

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

Optionally, the position information of the normalization coefficient may be the 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 index of the normalization coefficient may be used to indicate the position of the normalization coefficient.

In the embodiment of the present application, the one or more normalized coefficients may be: one first normalized coefficient, one or more second normalized coefficients, and/or one or more third normalized coefficients化 factor.

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 to normalize each of the M weighting coefficients.

The second normalization coefficient and the third normalization coefficient are described below in conjunction with FIG. 5. As shown in FIG. 5, a schematic diagram of a time-frequency-space unit set provided by an embodiment of this application. Fig. 5 shows a three-dimensional coordinate system and the positions of time-frequency-space units in the set of time-frequency-space units 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 magnitude 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 is understandable that the above-mentioned plane can be a plane composed of time and space dimensions in a three-dimensional coordinate system, or a plane composed of time and frequency dimensions, or a plane composed of frequency and space dimensions. 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 is understandable that the above-mentioned row may be a row in the frequency domain dimension, a row in the time domain dimension, or a row in the spatial domain dimension.

Optionally, if the first normalized coefficient and the second normalized coefficient exist in the coefficient information at the same time, it means that the M weighting coefficients are multi-level quantization. Among them, the first-level quantization is to quantize the relative value of the second normalized coefficient determined through the first normalized coefficient processing. 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 normalized coefficient.

Optionally, if the first normalized coefficient and the third normalized coefficient exist in the coefficient information at the same time, it indicates that the M weighting coefficients are multi-level quantization. Among them, the first-level quantization is to quantize the relative value of the third normalized coefficient determined through the first normalized coefficient processing. The second-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 third normalized coefficient.

Optionally, if the second normalized coefficient and the third normalized coefficient exist in the coefficient information at the same time, it indicates that the M weighting coefficients are multi-level quantization. Among them, the first-level quantization is to quantize the relative value of the third normalized coefficient determined through the second normalized coefficient processing. The second-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 third normalized coefficient.

Optionally, if the first normalized coefficient, the second normalized coefficient, and the third normalized coefficient simultaneously exist in the coefficient information, it indicates that the M weighting coefficients are multi-level quantization. Among them, the first-level quantization is to quantize the relative value of the second normalized coefficient determined through the first normalized coefficient processing. The second level of quantization is to quantize the relative value of the third normalized coefficient determined by the second normalized 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 the weighting coefficients in the coefficient information may be predefined. In this way, the terminal or network device can respectively indicate and analyze the quantization information of each weighting coefficient based on the same arrangement sequence.

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

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

In addition, since the magnitude of the weighting coefficients corresponding to the R time-frequency-space units is 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.

Of course, the first indication information may also indicate the weighting coefficients of the R time-frequency-space units. Therefore, the coefficient information is actually used to indicate the weighting coefficients of M+R time-frequency-space units. In this case, the system information can be realized 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 normalized coefficients, and quantized information of each of the M+R weighted coefficients except the normalized coefficient.

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

Optionally, in the foregoing 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 with non-zero amplitude among the M+R weighting coefficients.

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

It should be noted that the specific description of the coefficient information used to indicate the weighting coefficients of the M+R time-frequency-space units can refer to the specific description of the coefficient information used to indicate the weighting coefficients of the M time-frequency-space units. 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 (PUSCH) or a physical uplink control channel (PUCCH).

Optionally, the first indication information may be PMI, or part of information elements in the PMI, or other indication information other than PMI, and the embodiment of the present application is not limited thereto.

For the specific implementation of step S102, reference may be made to the prior art, which will not be repeated here.

S103. The network device determines M time-frequency-space units and 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 precoding vector) according to the M time-frequency-space units and the M time-frequency-space units. Wherein, the codebook used to construct the precoding matrix (or precoding vector) may adopt the following time-frequency-space codebook. It can be understood that the time-frequency-space codebook is merely an exemplary name proposed to distinguish it from the type I codebook and the type II codebook. 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.

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).

among them,

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

Is the n-th frequency-domain basis vector among the N frequency-domain basis vectors;

Is the k-th time-domain basis vector among the K time-domain basis vectors; α _{n, l, k} are the weighting coefficients corresponding to the l-th spatial-domain basis vector, the n-th frequency-domain basis vector and the k-th time-domain basis vector .

Based on the technical solution shown in FIG. 4, since each of 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, The time-domain basis vector can characterize the changing law of the channel in the time domain. Therefore, the precoding matrix (or precoding vector) determined by the M time-frequency space units and M weighting coefficients indicated by the first indication information can match The channel that the terminal changes with time to ensure normal communication between network equipment 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 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 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 the embodiment of the present application, the configuration information may use an explicit manner to indicate the value of n, for example, the configuration information includes the value of n. Alternatively, the configuration information may use an implicit manner to indicate the value of n, 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 the 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 other information, and the embodiment of the present application is not limited thereto.

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

As an implementation manner, the second indication information may be carried in codebook indication information, and the codebook indication information is used to indicate the 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 in the embodiments of the present application. It is understandable 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 second indication information to the terminal to trigger the terminal to adopt a preset channel state information feedback mode, so that the terminal can feed back channel state information based on n time units to ensure that the network The precoding matrix (or precoding vector) used by the device can match the channel that the terminal changes over time, ensuring 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: The network device sends reference signal resource configuration information to the terminal.

Wherein, 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 the 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 part of the cells in the aforementioned CSI reporting setting.

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

Case 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 to say, one reference signal resource set corresponds to one time unit. In this way, if two reference signal resources belong to different reference signal resource sets, the two reference signal resources correspond to different time units. If two reference signal resources belong to the same reference signal resource set, the two reference signal resources correspond to the same time unit.

Case 2: 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.

It is understandable 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 start symbol is OFDM symbol #1 and the time domain offset value is 3, then the time domain resource corresponding to the reference signal resource is OFDM#4.

In the 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 reported by CSI is periodic or semi-persistent, then for case 1, the number of reference signal resource sets configured by the reference signal resource configuration information is equal to n, that is, the reference signal resource configuration information is configured 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 receive and measure reference signals.

If the time domain behavior reported by CSI 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 contains the number of reference signal resources The number is equal to n. In this way, the terminal can receive and measure reference signals on the n reference signal resources included in the reference signal resource set.

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

If the time domain behavior reported by CSI is aperiodic, for case 2, the number of reference signal resource sets configured by the reference signal resource 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 identity of the reference signal resource set used 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 reference signals.

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

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 Trigger State 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 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 based on multiple time units. Channel state information for each time unit.

The foregoing mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between each network element. It can be understood that, in order to realize the above-mentioned functions, each network element, such as a network device and a terminal, includes a hardware structure and/or software module corresponding to each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of the examples described in the embodiments disclosed in this document, the present application can be implemented in hardware or in a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

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

FIG. 8 is a schematic structural diagram of a terminal provided by an embodiment of the 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 used in 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 content of the steps involved in the foregoing method embodiments can be cited in the functional description of the corresponding functional module, 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, and the processing module 802 in FIG. 8 may be implemented by the processor 101 in FIG. 2. The embodiment of the application does not impose any restriction on this.

The embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium stores computer instructions; when the computer-readable storage medium runs on the terminal shown in FIG. 2, the terminal is caused to execute The method shown in Figure 4, Figure 6 and Figure 7. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server, or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or include one or more data storage devices such as servers, data centers, etc. that can be integrated with the medium. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium, or a semiconductor medium (for example, a solid state disk (SSD)).

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

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

The terminals, computer storage media, chips, and computer program products provided in the above embodiments of this application are all used to execute the methods provided above. Therefore, the beneficial effects that can be achieved can refer to the corresponding beneficial effects of the methods provided above. , I won’t repeat it here.

FIG. 9 is a schematic structural diagram of a network device provided by an embodiment of this 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 used in the technical solutions described herein. The processing module 902 is used to support the network device to perform step S104 in FIG. 4 and/or other processes used in the technical solutions described herein. All relevant content of the steps involved in the foregoing method embodiments can be cited in the functional description of the corresponding functional module, 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. The embodiment of this application does not impose any restriction on this.

The embodiment of the present application also provides a computer-readable storage medium in which computer instructions are stored; when the computer-readable storage medium runs on the network device shown in FIG. 2, the network The device executes the methods shown in Figure 4, Figure 6, and Figure 7. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or include one or more data storage devices such as servers, data centers, etc. that can be integrated with the medium. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium, or a semiconductor medium (for example, a solid-state hard disk).

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

The embodiment of the present application also provides a computer program product containing computer instructions, when it runs on the network device shown in FIG. 2, the network device can execute the methods shown in FIG. 4, FIG. 6, and FIG. 7.

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

Although the present application is described in conjunction with various embodiments, those skilled in the art can understand and implement other changes of the disclosed embodiments by looking at the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. A single processor or other unit can implement several functions listed in the claims. Certain measures are described in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

Although the present application has been described with reference to specific features and embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the present application. Accordingly, this specification and drawings are merely exemplary descriptions of the application defined by the appended claims, and are deemed to have covered any and all modifications, changes, combinations or equivalents within the scope of the application. Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, then this application is also intended to include these modifications and variations.

Claims

An information feedback method, characterized in that the method includes:

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; a time-frequency-space unit is based on a time-domain basis vector and a frequency-domain basis. The vector and a spatial basis vector are determined, and M is a positive integer;

Sending the first instruction information.
The information feedback method according to claim 1, wherein:

The first indication information is used to indicate the indexes of M time-frequency-space units in a time-frequency-space unit set; or,

The first indication information is used to indicate the indexes of the M time-frequency-space units in the time-frequency-space unit subset.
The information feedback method according to claim 1, wherein:

The first indication information is used to indicate L spatial base vectors, K time domain base vectors, and N frequency domain base vectors; or,

The first indication information is used to indicate L space-domain basis vectors and X 1 time-frequency units; one time-frequency unit is determined by one time-domain basis vector and one frequency-domain basis vector; or,

The first indication information is used to indicate K time-domain basis vectors and X 2 space-frequency units; one space-frequency unit is determined by one space-domain basis vector and one frequency-domain basis vector; or,

The first indication information is used to indicate N frequency-domain base vectors and X 3 spatio-temporal units; one spatio-temporal unit is determined by a time-domain base vector and a spatial-domain base vector;

Among them, L, K, N, X 1 , X 2 and X 3 are all positive integers.
The information feedback method according to any one of claims 1 to 3, characterized in that, before generating the indication information, it further comprises:

Receiving second indication information, where the second indication information is used to configure a preset channel state information feedback mode;

If the terminal adopts a 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.
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.
The information feedback method according to claim 4 or 5, wherein the second indication information is also used to indicate the value of n.
The information feedback method according to any one of claims 1 to 6, wherein the method further comprises:

Receiving reference signal resource configuration information, where 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.
The information feedback method according to any one of claims 1 to 6, wherein the method further comprises:

Receiving 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.
An information feedback method, characterized in that the method includes:

Receive 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-frequency-space unit is based on a time-domain basis vector and a frequency-domain basis The vector and a spatial basis vector are determined, and M is a positive integer;

Determine the weighting coefficients of the M time-frequency-space units and the M time-frequency-space units according to the first indication information.
The information feedback method according to claim 9, wherein:

The first indication information is used to indicate the indexes of M time-frequency-space units in a time-frequency-space unit set; or,

The first indication information is used to indicate the indexes of the M time-frequency-space units in the subset of the time-frequency-space unit set.
The information feedback method according to claim 9, wherein:

The first indication information is used to indicate L spatial base vectors, K time domain base vectors, and N frequency domain base vectors; or,

The first indication information is used to indicate L space-domain basis vectors and X 1 time-frequency units; one time-frequency unit is determined by one time-domain basis vector and one frequency-domain basis vector; or,

The first indication information is used to indicate K time-domain basis vectors and X 2 space-frequency units; one space-frequency unit is determined by one space-domain basis vector and one frequency-domain basis vector; or,

The first indication information is used to indicate N frequency-domain base vectors and X 3 spatio-temporal units; one spatio-temporal unit is determined by a time-domain base vector and a spatial-domain base vector;

Among them, L, K, N, X 1 , X 2 and X 3 are all positive integers.
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 to 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 also used to indicate the value of n.
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 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.
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, and the multiple reference signal resource sets correspond to different time units.
A terminal, characterized in that it comprises:

The processing module is 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 spatial domain basis vector are determined, M is a positive integer;

The communication module is used to send the first instruction information.
The terminal according to claim 17, wherein:

The first indication information is used to indicate the indexes of M time-frequency-space units in a time-frequency-space unit set; or,

The first indication information is used to indicate the indexes of the M time-frequency-space units in the subset of the time-frequency-space unit set.
The terminal according to claim 17, wherein:

The first indication information is used to indicate L spatial base vectors, K time domain base vectors, and N frequency domain base vectors; or,

The first indication information is used to indicate L space-domain basis vectors and X 1 time-frequency units; one time-frequency unit is determined by one time-domain basis vector and one frequency-domain basis vector; or,

The first indication information is used to indicate K time-domain basis vectors and X 2 space-frequency units; one space-frequency unit is determined by one space-domain basis vector and one frequency-domain basis vector; or,

The first indication information is used to indicate N frequency-domain base vectors and X 3 spatio-temporal units; one spatio-temporal unit is determined by a time-domain base vector and a spatial-domain base vector;

Among them, L, K, N, X 1 , X 2 and X 3 are all positive integers.
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, if a preset channel state information feedback mode is adopted, detect reference signals of n time units to determine channel state information, where the channel state information includes the first indication information, and n is greater than 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.
The terminal according to claim 20 or 21, wherein the second indication information is further used to indicate the value of n.
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, and the reference signal resource set includes multiple reference signal resources, and the multiple reference signal resources Correspond to different time units.
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.
A network device, characterized in that it comprises:

The communication module receives first indication information, where the first indication information is used to indicate M time-frequency-space units and the weighting coefficients of the M time-frequency-space units; one time-frequency-space unit is based on one time-domain basis vector, one Frequency domain basis vector and a spatial domain basis vector are determined, M is a positive integer;

The processing module determines the weighting coefficients of the M time-frequency space units and the M time-frequency space units according to the first indication information.
The network device according to claim 25, wherein:

The first indication information is used to indicate the indexes of M time-frequency-space units in a time-frequency-space unit set; or,

The first indication information is used to indicate the indexes of the M time-frequency-space units in the time-frequency-space unit subset.
The network device according to claim 25, wherein:

The first indication information is used to indicate L spatial base vectors, K time domain base vectors, and N frequency domain base vectors; or,

The first indication information is used to indicate L space-domain basis vectors and X 1 time-frequency units; one time-frequency unit is determined by one time-domain basis vector and one frequency-domain basis vector; or,

The first indication information is used to indicate K time-domain basis vectors and X 2 space-frequency units; one space-frequency unit is determined by one space-domain basis vector and one frequency-domain basis vector; or,

The first indication information is used to indicate N frequency-domain base vectors and X 3 spatio-temporal units; one spatio-temporal unit is determined by a time-domain base vector and a spatial-domain base vector;

Among them, L, K, N, X 1 , X 2 and X 3 are all positive integers.
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.
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.
The network device according to claim 28 or 29, wherein the second indication information is further used to indicate the value of n.
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, the reference signal resource set includes multiple reference signal resources, and the multiple reference signal resources Correspond to different time units.
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.
A communication device, characterized in that the communication device comprises a processor and a memory, and the memory stores program instructions, and when the program instructions are executed by the processor, the processor realizes the functions as claimed in claims 1 to 16. Any one of the information feedback methods.
A computer-readable storage medium, characterized in that instructions are stored in the computer-readable storage medium, and when the instructions are run on a communication device, the communication device executes any one of claims 1 to 16 The information feedback method described.
A computer program product, wherein the computer program product includes program instructions, and when the program instructions are executed by a processor, the processor realizes the information feedback method according to any one of claims 1 to 16 .
A chip, characterized in that the chip includes a processor, and when the processor executes program instructions, the processor is configured to implement the information feedback method according to any one of claims 1 to 16.
A communication system, characterized by comprising a terminal and a network device; wherein, the terminal is used to implement the information feedback method of any one of claims 1 to 8; the network device is used to implement claims 9 to 16 Any one of the information feedback methods.