CN113965232B

CN113965232B - Information feedback method and device

Info

Publication number: CN113965232B
Application number: CN202111073632.7A
Authority: CN
Inventors: 金黄平; 任翔; 王潇涵; 韩玮; 吴晔; 毕晓艳
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-01-30
Filing date: 2019-01-30
Publication date: 2024-04-09
Anticipated expiration: 2039-01-30
Also published as: CN113965232A; CN111510189B; WO2020156103A1; CN111510189A

Abstract

The application provides an information feedback method and device, relates to the technical field of communication, and is used for solving the problem that channel state information fed back by a current terminal is not suitable for a mobile terminal. The method comprises the following steps: the terminal generates first indication information, wherein the first indication information is used for indicating M time-frequency space units and weighting coefficients of the M time-frequency space units; wherein a time-frequency space unit is determined based on a time-domain basis vector, a frequency-domain basis vector, and a space-domain basis vector. And then, the terminal sends the first indication information to the network equipment. The method and the device are suitable for the channel detection process.

Description

Information feedback method and device

Technical Field

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

Background

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 increase in spectral efficiency by using Massive antennas. The accuracy of the channel state information (channel state information, CSI) acquired by the network device determines to a large extent the performance of Massive MIMO. In frequency division duplex (frequency division duplex, FDD) systems or time division duplex (time division duplex, TDD) systems where channel diversity is not well satisfied, codebooks are typically used to quantize CSI. Thus, codebook design is a key issue for Massive MIMO.

In the third generation partnership project (3rd generation partnership project,3GPP) R15 protocol, the codebook is divided into a Type I codebook and a Type II codebook. The idea of the Type I codebook is beam selection, and the Type I codebook has low overhead but low approximation accuracy. The idea of the Type II codebook is beam linear combination, the approximation accuracy of the Type II codebook is high, but the feedback overhead is large. The codebook that is the dominant opinion in the R16 protocol is the frequency domain compressed codebook. The frequency domain compression codebook compresses the codebook by utilizing the continuity of the frequency domain, so that the feedback overhead can be reduced and the performance of the codebook can be improved.

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

Disclosure of Invention

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

In order to achieve the above purpose, the present application adopts the following technical scheme:

in a first aspect, an information feedback method is provided, including: the terminal generates first indication information, wherein the first indication information is used for indicating M time-frequency space units and weighting coefficients of the M time-frequency space units; a time-frequency space unit is determined according to a time-domain base vector, a frequency-domain base vector and a space-domain base vector, and M is a positive integer. And then, the terminal sends the first indication information to the network equipment. 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 base vector, a time domain base vector and a space domain base vector, and the time domain base vector can represent a change rule of the channel in the time domain, the time-frequency space unit can also represent a 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 be matched with a channel changed by the terminal along with the change of time, so that normal communication between the network equipment and the terminal is ensured.

In one possible design, the first indication information is used to indicate indexes of M time-frequency space units in the time-frequency space unit set; or, the first indication information is used for indicating indexes of the M time-frequency space units in the time-frequency space unit subset.

In one 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 for indicating L space base vectors and X ₁ A plurality of time-frequency units; or, the first indication information is used for indicating K time domain base vectors and X ₂ A plurality of space frequency units; or, the first indication information is used for indicating N frequency domain base vectors and X ₃ And a space-time unit. Wherein, a time-frequency unit is determined by a time-domain base vector and a frequency-domain base vector; a space frequency unit is determined by a space base vector and a frequency domain base vector; a space-time unit is defined by a time-domain basis vector and a space-domain basis vector. L, K, N, X ₁ 、X ₂ X is as follows ₃ Are all positive integers.

In one possible design, before the terminal generates the indication information, the method further includes: the terminal receives second indication information, wherein the second indication information is used for configuring a preset channel state information feedback mode; if the terminal adopts a preset channel state information feedback mode, the terminal detects reference signals of n time units, determines channel state information, wherein the channel state information comprises first indication information, and n is an integer greater than 1. In this way, the terminal can feed back the channel state information based on n time units, so that the precoding matrix (or precoding vector) adopted by the network equipment can be matched with the channel changed by the terminal along with time, and normal communication between the network equipment and the terminal is ensured.

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

In one possible design, the second indication information is further used to indicate the value of n, so that the terminal determines the value of n, i.e. the number of time units in which the terminal is able to determine the reference signal measurement needs to be made.

In one possible design, the method further comprises: the terminal receives reference signal resource configuration information, wherein the reference signal resource configuration information is used for configuring a reference signal resource set, the reference signal resource set comprises a plurality of reference signal resources, and the plurality of reference signal resources correspond to different time units.

In one possible design, the method further comprises: the terminal receives reference signal resource configuration information, wherein the reference signal resource configuration information is used for configuring a plurality of reference signal resource sets, and the plurality of reference signal resource sets correspond to different time units.

In a second aspect, an information feedback method is provided, including: the network equipment receives first indication information, wherein the first indication information is used for indicating M time-frequency space units and weighting coefficients of the M time-frequency space units; a time-frequency space unit is determined according to a time-domain base vector, a frequency-domain base vector and a space-domain base vector, and M is a positive integer. And then, the network equipment determines M time-frequency space units and weighting coefficients of the 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 base vector, a time domain base vector and a space domain base vector, and the time domain base vector can represent a change rule of the channel in the time domain, the time-frequency space unit can also represent a 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 be matched with a channel changed by the terminal along with the change of time, so that normal communication between the network equipment and the terminal is ensured.

In one possible design, the first indication information is used to indicate indexes of M time-frequency space units in the time-frequency space unit set; alternatively, the first indication information is used to indicate indexes of M time-frequency space units in a subset of the set of time-frequency space units.

In one possible design, the method further comprises: transmitting second indication information, wherein the second indication information is used for configuring a preset channel state information feedback mode; the preset channel state information feedback mode is used for indicating the terminal to detect the reference signals of n time units and determining the channel state information; the channel state information includes first indication information, n being an integer greater than 1.

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

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

In one possible design, the method further comprises: the network device sends reference signal resource configuration information, the reference signal resource configuration information is used for configuring a reference signal resource set, the reference signal resource set comprises a plurality of reference signal resources, and the plurality of reference signal resources correspond to different time units.

In one possible design, the method further comprises: the network device sends reference signal resource configuration information, wherein the reference signal resource configuration information is used for configuring a plurality of reference signal resource sets, and the plurality of 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 for generating first indication information, wherein the first indication information is used for indicating M time-frequency space units and weighting coefficients of the M time-frequency space units; a time-frequency space unit is determined according to a time-domain base vector, a frequency-domain base vector and a space-domain base vector, and M is a positive integer. And the communication module is used for sending the first indication information.

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

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

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

In a fourth aspect, there is provided a communication apparatus comprising: the processor is used for reading the instructions in the memory and realizing the information feedback method according to the first aspect according to the instructions.

In a fifth aspect, a computer readable storage medium is provided, in which instructions are stored which, when run on a communication device, enable the communication device to perform the information feedback method according to the first aspect described above.

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

In a seventh aspect, a chip is provided, the chip comprising a processing module and a communication interface, the communication interface being configured to receive an input signal and provide the input signal to the processing module, and/or to output a signal generated by the processing module, the processing module being configured to perform the information feedback method according to the first aspect. In an embodiment, the processing module may execute code instructions to perform the information feedback method according to the first aspect. The code instructions may come from memory internal to the chip or from memory external to the chip. Alternatively, the processing module may be an integrated processor or microprocessor or integrated circuit on the chip. The communication interface may be an input-output circuit or a transceiver pin on the chip.

The technical effects of any one of the design manners of the third aspect to the seventh aspect may be referred to as the beneficial effects of the corresponding method provided above and the technical effects of the design manner, which are not described herein.

An eighth aspect provides a network device, comprising: and the communication module and the processing module. The communication module is used for receiving first indication information, wherein the first indication information is used for indicating M time-frequency space units and weighting coefficients of the M time-frequency space units; a time-frequency space unit is determined according to a time-domain base vector, a frequency-domain base vector and a space-domain base vector, and M is a positive integer. And the processing module is used for determining M time-frequency space units and weighting coefficients of the M time-frequency space units according to the first indication information.

In one possible design, 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 for indicating the terminal to detect the reference signals of n time units and determining the channel state information; the channel state information includes first indication information, n being an integer greater than 1.

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

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

A ninth aspect provides a communication apparatus comprising: the processor is used for reading the instructions in the memory and realizing the information feedback method according to the second aspect.

In a tenth aspect, there is provided a computer readable storage medium having instructions stored therein which, when executed on a communication device, enable the communication device to perform the information feedback method of the second aspect described above.

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

In a twelfth aspect, a chip is provided, the chip including a processing module and a communication interface, the communication interface being configured to receive an input signal and provide the input signal to the processing module, and/or to output a signal generated by the processing module, the processing module being configured to perform the information feedback method according to the second aspect. In an embodiment, the processing module may execute code instructions to perform the information feedback method of the second aspect. The code instructions may come from memory internal to the chip or from memory external to the chip. Alternatively, the processing module may be an integrated processor or microprocessor or integrated circuit on the chip. The communication interface may be an input-output circuit or a transceiver pin on the chip.

The technical effects of any one of the eighth to twelfth aspects may be referred to as the beneficial effects of the corresponding method provided above and the technical effects of the design, which are not described herein.

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

Drawings

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

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

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

fig. 4 is a flowchart of a method for information feedback according to an embodiment of the present application;

fig. 5 is a schematic diagram of a time-frequency space unit set according to an embodiment of the present application;

fig. 6 is a second flowchart of an information feedback method according to an embodiment of the present application;

fig. 7 is a flowchart III of an information feedback method according to an embodiment of the present application;

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

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

Detailed Description

In the description of the present application, "/" means "or" unless otherwise indicated, for example, a/B may mean a or B. "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. Furthermore, "at least one" means one or more, and "a plurality" means two or more. The terms "first," "second," and the like do not limit the number and order of execution, and the terms "first," "second," and the like do not necessarily differ.

In this application, the terms "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

The technical scheme provided by the application can be applied to various communication systems. The technical scheme provided by the application can be applied to a 5G communication system, a future evolution system or a plurality of communication fusion systems and the like, and can also be applied to an existing communication system and the like. The application scenarios of the technical scheme provided by the application may include various scenarios such as machine-to-machine (machine to machine, M2M), macro-micro communication, enhanced mobile broadband (enhanced mobile broadband, eMBB), ultra-high reliability and ultra-low latency communication (ultra-reliable & low latency communication, uirllc), mass internet of things communication (massive machine type communication, mctc), and the like. These scenarios may include, but are not limited to: a communication scenario between terminals, a communication scenario between a network device and a network device, a communication scenario between a network device and a terminal, etc. The following description will take the application of the technical solution of the present application to the scenario where the network device and the terminal communicate as an example.

In addition, the network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided in the embodiments of the present application, and as a person of ordinary skill in the art can know, with evolution of the network architecture and appearance of a new service scenario, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems.

Fig. 1 is a schematic architecture diagram of a communication system to which the technical solution of the present application is applied. As shown in fig. 1, the communication system may include one or more network devices (only 1 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 scenario of the technical solution provided in the present application.

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

The terminal is used for providing voice and/or data connectivity services to the user. The terminals may be variously named, for example, user Equipment (UE), access terminals, terminal units, terminal stations, mobile stations, remote terminals, mobile devices, wireless communication devices, terminal agents or terminal apparatuses, etc. Alternatively, the terminal 20 may be a handheld device, an in-vehicle device, a wearable device, or a computer with a communication function, which is not limited in the embodiments of the present application. For example, the handheld device may be a smart phone. The in-vehicle device may be an in-vehicle navigation system. The wearable device may be a smart bracelet or a Virtual Reality (VR) device. The computer may be a personal digital assistant (personal digital assistant, PDA) computer, a tablet computer, or a laptop computer (laptop computer).

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

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

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

The memory 102 may be a read-only memory (ROM) or other type of static storage device, a random access memory (random access memory, RAM) or other type of dynamic storage device that may store static information and instructions, or may be an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a compact disc read-only memory (compact disc read-only memory) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, as the embodiments of the present application are not limited in this regard. The memory 102 may be a stand-alone memory and may be coupled to the processor 101 via a bus. Memory 102 may also be integrated with processor 101. The memory 102 is used for storing application program codes for executing the scheme of the application, and the execution is controlled by the processor 101. The processor 101 is configured to execute computer program code stored in the memory 102, thereby implementing the methods provided in the embodiments of the present application.

The transceiver 103 may use any transceiver-like device for communicating with other devices or communication networks, such as ethernet, radio access network (radio access network, RAN), wireless local area network (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 may display information in a variety of ways. For example, the output device 104 may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a Cathode Ray Tube (CRT) display device, or a projector (projector), or the like. The input device 105 is in communication with the processor 101 and may receive user input in a variety of ways. For example, the input device 105 may be a mouse, a keyboard, a touch screen device, a sensing device, or the like.

The network device comprises 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. The network interface 204 is used to connect with a core network device through a link (such as an S1 interface), or connect with a network interface of another network device through a wired or wireless link (such as an X2 interface) (not shown in the figure), which is not limited in particular in the embodiment of the present application. In addition, the description of the processor 201, the memory 202 and the transceiver 203 may refer to the description of the processor 101, the memory 102 and the transceiver 103 in the terminal, which is not repeated herein.

In order to facilitate understanding of the embodiments of the present application, the following description will be made.

The first, the present embodiments relate to the meaning of the main parameters:

(1)N _s : the length of the spatial basis vector, i.e., the number of elements that the spatial basis vector contains. In this embodiment of the present application, the length of the vector may also be referred to as a dimension of the vector, which is generally described herein, and will not be described in detail.

(2)N _f : the length of the frequency domain basis vector, i.e. the number of elements comprised by the frequency domain basis vector.

(3)N _t : the length of the time domain base vector also refers to the number of elements that the time domain base vector contains.

(4) F: frequency domain basis vectors. Illustratively, in a two-dimensional coordinate system, F is deformable toF is deformable to +.>

(5) A: time domain basis vectors. Illustratively, in a two-dimensional coordinate system, A is deformable toIn the three-dimensional coordinate system, A is deformable to +.>

(6) S: spatial basis vectors. Exemplary, in a two-dimensional coordinate system, S is deformable toIn the three-dimensional coordinate system S is deformable to +.>

Second, the meaning of the operation symbol in the formula related in the embodiment of the present application:

(1) The subscript H denotes the conjugate transpose, e.g. u ^H Is the conjugate transpose of the vector (or matrix) u.

(2) The subscript T denotes the transpose, e.g. u ^T Is a transpose of the vector (or matrix) u.

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

(4)Represents the Kronecker product. The specific definition of the kronecker product is referred to in the prior art and will not be described in detail herein.

(5) A combination (combination) of m (m.ltoreq.n) elements from n different elements is taken as a group, called taking a combination of m elements from n different elements. The number of combinations of m elements taken out of n different elements is

(6)Representing an upward rounding.

In the third embodiment, any vector (for example, spatial base vector, frequency domain base vector, time domain base vector, etc.) is exemplified as a column vector, and the description is unified herein, and the description is omitted herein. It will be appreciated that in particular implementations, either vector may be a row vector. Those skilled in the art should be able to reasonably estimate that any vector is a row vector according to the technical solution provided in the present application without performing any inventive effort, and the corresponding technical solution will not be described herein. Further, in the specific implementation, the form of the vector used herein may be adjusted according to specific needs, for example, the vector may be transposed, or the vector may be represented as a conjugate of the vector, or a combination of the above various manners, and other manners. Accordingly, the various adaptations and modifications described above are intended to be comprehended within the scope of the embodiments of the present application.

Fourth, in the present embodiment, for convenience of description, when numbering is referred to, numbering may be continued from 0. For example, M time-frequency space units include 0 th time-frequency space unit through M-1 th time-frequency space unit, and so on, which are not illustrated here. Of course, the specific implementation is not limited to this, and for example, the serial numbers may be numbered from 1. It should be understood that the foregoing is provided for the purpose of describing the embodiments of the present application, and is not intended to limit the scope of the present application.

Fifth, in the embodiments of the present application, "for indicating" may include for direct indication and for indirect indication. For example, when describing that certain indication information is used for indication information I, the indication information may be included to directly indicate I or indirectly indicate I, and does not necessarily represent that I is carried in the indication information.

The information indicated by the indication information is referred to as information to be indicated, and in a specific implementation process, there are various ways of indicating the information to be indicated, for example, but not limited to, the information to be indicated may be directly indicated, such as the information to be indicated itself or an index of the information to be indicated. The information to be indicated can also be indicated indirectly by indicating other information, wherein the other information and the information to be indicated have an association relation. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance. For example, the indication of the specific information may also be achieved by means of a pre-agreed (e.g., protocol-specified) arrangement sequence of the respective information, thereby reducing the indication overhead to some extent. And meanwhile, the universal part of each information can be identified and indicated uniformly, so that the indication cost caused by independently indicating the same information is reduced. For example, it will be appreciated by those skilled in the art that the precoding matrix is composed of precoding vectors, and that each precoding vector in the precoding matrix may have the same portion in terms of composition or other properties.

The specific indication means may be any of various existing indication means, such as, but not limited to, the above indication means, various combinations thereof, and the like. Specific details of various indications may be referred to the prior art and are not described herein. As can be seen from the above, for example, when multiple pieces of information of the same type need to be indicated, different manners of indication of different pieces of information may occur. In a specific implementation process, a required indication mode can be selected according to specific needs, and in this embodiment of the present application, the selected indication mode is not limited, so that the indication mode according to the embodiment of the present application should be understood to cover various methods that can enable a party to be indicated to learn information to be indicated.

In addition, there may be other equivalent forms of information to be indicated, for example, a row vector may be represented as a column vector, a matrix may be represented by a transposed matrix of the matrix, a matrix may also be represented as a vector or an array, the vector or array may be formed by interconnecting respective row vectors or column vectors of the matrix, a kronecker product of two vectors may also be represented by a product of one vector and a transposed vector of the other vector, and so on. The technical solutions provided in the embodiments of the present application should be understood to cover various forms. For example, reference to some or all of the features of the embodiments of the present application should be understood to encompass various manifestations of such features.

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

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

1. Airspace base vector

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

The spatial basis vector is typically associated with an antenna array, for example, many parameters to which the spatial basis vector expression relates may be understood as characterizing different properties of the antenna array. Accordingly, to facilitate understanding of the spatial basis vectors involved in embodiments of the present application, the spatial basis vectors will be described below in connection with an antenna array. However, it should be understood by those skilled in the art that the spatial basis vectors according to embodiments of the present application are not limited to a particular antenna array. In a specific implementation process, an appropriate antenna array may be selected according to specific needs, and based on the selected antenna array, various parameters related in the spatial base vector related to the embodiment of the present application are set.

Fig. 3 is a schematic diagram of an antenna array 300 that may be suitable for use in one embodiment of the present application. As shown in fig. 3, the antenna array 300 includes a plurality of vibrating tuples 302, and the vibrating tuples 302 are arranged in a matrix manner. Specifically, each row of the matrix contains a plurality of tuples 302 and each column contains a plurality of tuples 302. Each vibrating element group 302 includes two vibrating elements, namely a vibrating element 304 operating in a first polarization direction and a vibrating element 306 operating in a second polarization direction.

In a specific implementation process, the spatial basis vector may be obtained by kronecker product of two vectors, where the two vectors respectively represent spatial characteristics of two dimensions of the spatial domain. For example, in connection with FIG. 3, these two dimensions may be the dimension in which the rows and columns of the matrix of vibration tuples 302 shown in FIG. 3 are located.

In the embodiment of the present application, the dimension of the spatial basis vector is N _S I.e. a spatial basis vector comprising N _S The elements. N (N) _S May be the number of transmit antenna ports of the transmitting end device in one polarization direction. N (N) _S ≥2，N _S Is an integer.

2. Frequency domain unit

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

3. Frequency domain basis vector

The frequency domain basis vector is used for representing the change rule of the channel in the frequency domain. The frequency domain base vectors can be specifically used for representing the change rule of the weighting coefficient of each spatial base vector on each frequency domain unit. The change rule represented by the frequency domain base vector is related to multipath time delay and other factors. It will be appreciated that there may be different propagation delays of the signal on different propagation paths as it propagates through the wireless channel. The change rule of the channel in the frequency domain caused by different transmission delays can be characterized by different frequency domain basis vectors.

In the present embodiment, the dimension of the frequency domain basis vector is N _f I.e. a frequency domain basis vector comprising N _f The elements.

Alternatively, the dimension of the frequency domain basis vector may be equal to the number of frequency domain units needed for CSI measurement. Since the number of frequency domain units for which CSI measurements need to be made at different times may be different, the dimensions of the frequency domain basis vectors may also be different. In other words, the dimensions of the frequency domain basis vector are variable.

Alternatively, the dimension of the frequency domain basis vector may also be equal to the number of frequency domain units comprised by the available bandwidth of the terminal. Wherein the available bandwidth of the terminal may be configured by the network device. The available bandwidth of the terminal is a part or all of the system bandwidth. The available bandwidth of the terminal may also be referred to as a partial Bandwidth (BWP), which is not limited by the embodiment of the present application.

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

4. Time cell

The time unit is composed of at least one Time Interval (TI) in the time domain, where TI may be a transmission time interval (transmission time interval, TTI) in the LTE system, or a symbol-level short TTI, or a slot (slot), mini-slot (mini-slot) or an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol in the 5G system, or the like. The embodiments of the present application are not limited in this regard.

5. Time domain basis vector

The time domain basis vector is used for representing the change rule of the channel in the time domain. That is, the time domain basis vector is used to characterize the time-variant of the channel. The time-varying nature of a channel refers to the variation of the transfer function of the channel over time. The time-variability of the channel is related to Doppler shift (Doppler shift) and other factors.

In the present embodiment, the dimension of the time domain basis vector is N _t I.e. a time domain basis vector comprising N _t The elements.

Alternatively, the dimension of the time domain basis vector may be equal to the number of time units needed for CSI measurement. It will be appreciated that the dimensions of the time domain basis vectors may also be different, since the number of time units needed to make CSI measurements may be different in different scenarios. In other words, the dimension of the time domain basis vector is variable.

6. Time-frequency unit

A time-frequency unit is determined based on 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 will be appreciated that the time-frequency matrix and the time-frequency vector may be mutually transformed and may each be determined by the same time-frequency basis vector and the same frequency-domain basis vector, and thus the time-frequency matrix and the time-domain vector are equivalent.

Time-frequencyThe matrix may be of dimension N _t ×N _f Is a matrix of (a) in the matrix. Alternatively, the time-frequency matrix may be, but is not limited to being, determined by any of the following formulas:wherein v is ₁ Representing a time-frequency unit.

The time-frequency vector may be of length N _t ×N _f Is a vector of (a). Alternatively, the time-frequency vector may be, but is not limited to being, determined by any of the following formulas:

The above formula is merely an example provided in the embodiments of the present application, and the determining formula of the time-frequency unit in the embodiments of the present application is not specifically limited.

In addition, the time-frequency units may also have other names, such as frequency-time units. Similarly, the time-frequency vector may also have other names, such as a frequency-time vector. The time-frequency matrix may also have other names, such as a frequency-time matrix. The embodiment of the present application is not particularly limited thereto.

7. Space-frequency unit

A space-frequency unit is determined based on 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 will be appreciated that the space-frequency matrix and the space-frequency vector may be mutually transformed and may each be determined from the same spatial base vector and the same frequency domain base vector, and thus the space-frequency matrix and the space-frequency vector are equivalent.

The space-frequency matrix may be of dimension N _s ×N _f Is a matrix of (a) in the matrix. Alternatively, the space-frequency matrix may be, but is not limited to being, determined by any of the following formulas:wherein v is ₂ Representing a space-frequency element.

The space-frequency vector may be of length N _t ×N _f Is a vector of (a). Alternatively, the space-frequency vector may be, but is not limited to, a vector obtained by any of the following formulasAnd (3) determining the formula:

The above formula is merely an example provided by the embodiments of the present application, and the determining formula of the spatial frequency unit in the embodiments of the present application is not specifically limited.

In addition, the space-frequency units may also have other names, such as space-frequency units. Similarly, the space-frequency vector may also have other names, such as a space-frequency vector. The space-frequency matrix may also have other names, such as a space-frequency matrix. The embodiment of the present application is not particularly limited thereto.

8. Space-time unit

The space-time unit is used for representing the change rule of the channel in two dimensions of a time domain and a 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 will be appreciated that both the spatio-temporal matrix and the spatio-temporal vector may be determined from the same time-domain basis vector and the same space-domain basis vector, and that the spatio-temporal matrix and the spatio-temporal vector may be inter-converted and, thus, are equivalent between the spatio-temporal matrix and the spatio-temporal vector.

The space-time matrix may be of dimension N _s ×N _t Is a matrix of (a) in the matrix. Alternatively, the spatiotemporal matrix may be determined, but is not limited to, by any of the following formulas:wherein v is ₃ Representing space-time cells.

The space-time vector may be of length N _t ×N _f Is a vector of (a). Alternatively, the spatiotemporal vector may be determined, but is not limited to, by any of the following formulas:

In addition, the space-time units may also have other names, such as space-time units. Similarly, space-time vectors may also have other names, such as space-time vectors. The space-time matrix may also have other names, such as space-time matrix. The embodiment of the present application is not particularly limited thereto.

9. Time-frequency space unit

The time-frequency space unit is used for representing the change rule of the channel in three dimensions of a time domain, a frequency domain and a space domain. A time-frequency space cell is determined from a time-domain basis vector, a frequency-domain basis vector, and a spatial-domain basis vector. Alternatively, a time-frequency space unit is determined based on a time-domain basis vector and a space-frequency unit. In another embodiment, a time-frequency space unit is determined from a frequency domain basis vector and a time-frequency unit. In another embodiment, a time-frequency space unit is determined based on a spatial basis vector and a time-frequency unit.

In a specific implementation, the time-frequency space unit is a time-frequency space matrix or a time-frequency space vector. It will be appreciated that the time-frequency space matrix and the time-frequency space vector may be converted to each other, the time-frequency space matrix and the time-frequency space vector being equivalent.

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

If the time-frequency space matrix is a three-dimensional matrix, the three-dimensional matrix contains N elements in the time domain dimension _t The number of elements contained in the frequency domain dimension is N _f The number of elements contained in the spatial dimension is: n (N) _s . Alternatively, the time-frequency space matrix may be, but is not limited to being, determined by any of the following formulas:

wherein (1)>Representing a time-frequency space matrix, which is a three-dimensional matrix.

If the time-frequency space matrix is a two-dimensional matrix, the time-frequency space matrix can have the following three implementation modes:

the two dimensions of the mode one, time-frequency space matrix may be referred to as the time-frequency dimension and the space-domain dimension, respectively. Wherein the number of elements contained in the time-frequency space matrix in the time-frequency dimension is N _t N _f The number of elements contained in the spatial dimension is: n (N) _s . The time-frequency space matrix can be expressed as In this case, the time-frequency space matrix may be determined by, but is not limited to, any of the following formulas:

the two dimensions of the mode two, time-frequency space matrix may be referred to as the space-time dimension and the frequency-domain dimension, respectively. Wherein the number of elements contained in the time-frequency space matrix in the time-space dimension is N _t N _s The number of elements contained in the frequency domain dimension is N _f . The time-frequency space matrix can be expressed asIn this case, the time-frequency space matrix may be determined by, but is not limited to, any of the following formulas:

the two dimensions of the time-frequency space matrix and the mode three can be respectively called a space-frequency dimension and a time-domain dimension. Wherein the number of elements contained in the space-frequency space matrix in the space-frequency dimension is N _s N _f The number of elements contained in the time domain dimension is N _t . The time-frequency space matrix can be expressed asIn this case, the time-frequency space matrix may be determined by, but is not limited to, any of the following formulas:

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 . Alternatively, the time-frequency space vector may be, but is not limited toAnd is determined by any one of the following formulas: wherein V is ^all Representing a time-frequency null vector.

The above formula is merely an example provided by the embodiments of the present application, and the determining formula of the time-space frequency unit in the embodiments of the present application is not specifically limited. For example, in the above formula, a conjugate vector (or a transposed vector, or a conjugate transposed vector) of the time domain base vector may be used instead of the time domain base vector, a conjugate vector (or a transposed vector, or a conjugate transposed vector) of the frequency domain base vector may be used instead of the frequency domain base vector, and a conjugate vector (or a transposed vector, or a conjugate transposed vector) of the time domain base vector may be used instead of the time domain base vector.

10. Time domain basis vector set

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

The time domain basis vectors in the set of time domain basis vectors may be expressed as:

wherein O is _t To a preset value, O _t Is a positive integer, m is more than or equal to 0 _t ≤O _t N _t -1. In the concrete implementation process, O _t It is understood that the oversampling is performed in one dimension of the time domain.

11. Frequency domain basis vector set

The set of frequency-domain basis vectors 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 vectors in the set of frequency-domain basis vectors may be expressed as:

wherein O is _f To a preset value, O _f Is a positive integer, m is more than or equal to 0 _f ≤O _f N _f -1. In the concrete implementation process, O _f It is understood that the oversampling is performed in one dimension of the time domain.

12. Airspace base vector set

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

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

wherein O is ₁ 、O ₂ To a preset value, O ₁ 、O ₂ Are all positive integers, m is more than or equal to 0 ₁ ≤O ₁ N ₁ -1，0≤m ₂ ≤O ₂ N ₂ -1. In the concrete implementation process, O ₁ And O ₂ The effect of (a) can be understood as oversampling in both dimensions of the spatial domain. N (N) ₁ And N ₂ May be used to represent the number of tuples 302 in each row (or column) of tuples 302 and the number of tuples 302 in each column (or row) of tuples 302 in the antenna array 300 shown in fig. 3.

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

The set of time-frequency cells includes a plurality of time-frequency cells. In a specific implementation, the set of time-frequency units may be a set of time-frequency vectors or a set of time-frequency matrices. It is understood that the set of time-frequency vectors comprises a plurality of time-frequency vectors and the set of time-frequency matrices comprises a plurality of time-frequency matrices. Alternatively, the set of time-frequency units may be preset, or may be determined according to the set of time-domain base vectors and the set of frequency-domain base vectors.

The set of space frequency units includes a plurality of space frequency units. In a specific implementation, the set of space-frequency units may be a set of space-frequency vectors or a set of space-frequency matrices. It is understood that the set of space-frequency vectors comprises a plurality of space-frequency vectors and the set of space-frequency matrices comprises a plurality of space-frequency matrices. Alternatively, the set of space-frequency units may be preset, or may be determined according to the set of space-domain base vectors and the set of frequency-domain base vectors.

The set of spatiotemporal cells includes a plurality of spatiotemporal cells. In a specific implementation, the set of space-time units may be a set of space-time vectors or a set of space-time matrices. It is understood that the set of space-time vectors comprises a plurality of space-time vectors and the set of space-time matrices comprises a plurality of space-time matrices. Alternatively, the space-time unit set may be preset, or may be determined according to the time domain base vector set and the space domain base vector set.

The set of time-frequency space units comprises a plurality of 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 is understood that the set of time-frequency space vectors comprises a plurality of time-frequency space vectors and the set of time-frequency space matrices comprises a plurality of time-frequency space matrices. Alternatively, the set of time-frequency space units may be preset, or may be determined according to the set of time-domain base vectors, the set of frequency-domain base vectors, and the set of space-domain base vectors.

14. Weighting coefficient

The weighting coefficients are used to represent the weights of the time-frequency space-time units when weighted together. The weighting coefficients include amplitude and phase. For example, the weighting coefficient is ae ^jθ Where a is amplitude and θ is phase.

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

15. Normalization and normalization coefficient

Before quantizing the weighting coefficients, normalization processing may be performed on each weighting coefficient, that is, the absolute value of each weighting coefficient is processed as a relative value with respect to the normalized coefficient. The normalization coefficient may be a predetermined one or a plurality of weighting coefficients, for example, a weighting coefficient having the largest magnitude (or modulus).

The following description will take, as an example, a weighting coefficient having the largest magnitude among a plurality of weighting coefficients as a normalization coefficient. For example, the magnitude of the weighting coefficient with the largest magnitude may be classified as 1, and the phase may be classified as 0 or 2pi; the other weighting coefficients are represented as relative values to the weighting coefficient with the largest magnitude. After normalization, the amplitude of each weighting coefficient has a value in the range of [0,1], and the phase of each weighting coefficient has a value in the range of [0,2 pi ] or [ -pi, pi ].

In the embodiments shown below, the normalization may be to determine the maximum weighting factor in units of one polarization direction, in units of one transmission layer (e.g. one or more polarization directions on one transmission layer), or in units of all transmission layers. Thus, normalization can be performed in different ranges for each polarization direction, each transmission layer, or all transmission layers, etc. It is to be understood that the units of normalization are not limited to the list above, which is not limiting in this application.

16. Reference signal, reference signal resource set

The 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 a time domain resource, a frequency domain resource, and a code domain resource of the reference signal. The set of reference signal resources includes one or more reference signal resources.

Taking the reference signal resource as an example of the CSI-RS resource, the CSI-RS resource may be divided into a Non Zero Power (NZP) CSI-RS resource and a Zero Power (ZP) CSI-RS resource.

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

CSI reporting setting may be used to indicate time domain behavior of CSI reporting, bandwidth, format corresponding to reporting quantity (reporting quality), etc. The time domain behaviors include, for example, periodicity (periodic), semi-persistent (semi-persistent), and aperiodic (aperiodic). The terminal device may generate a CSI report based on one CSI reporting setting.

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

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

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

s101, the terminal generates first indication information.

The first indication information is used for indicating 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 present application, the value of M is predefined, or indicated by the network device sending configuration information to the terminal. Alternatively, the configuration information may explicitly indicate the value of M, e.g. the configuration information includes the value of M. Alternatively, the configuration information implicitly indicates the value of M. For example, in the case where M time-frequency space units are determined according to L spatial base vectors, K time-domain base vectors, and N frequency-domain base vectors, that is, in the case where m=l×k×n, the configuration information may indicate the value of M indirectly by indicating the value of L, the value of K, and the value of N. Of course, the value of L, the value of K, and the value of N may be indicated by different information. For example, the value of L is indicated by the first information, the value of K is indicated by the second information, and the value of N is indicated by the third information.

It should be noted that the configuration information, the first information, the second information, and the third information may be carried in RRC signaling, MAC-CE signaling, or DCI, which is not limited thereto.

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

Alternatively, the above component information may be implemented in any one of the following ways one to five:

the first mode and the component information are used for indicating M time-frequency space units in the time-frequency space unit set.

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

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

(2) The component information includes: and 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 comprises Q time-frequency space units, selecting the combination number of M time-frequency space units from the time-frequency space unit set as It is understood that the combination of M time-frequency space units indicated by the component information is onlyOne of the combinations. This can be preset between the terminal and the network device>The index of each combination in the combinations is fed back by the terminal, so that the network device can determine the corresponding M time-frequency space units. It will be appreciated that in this case the overhead of the component information is +.>

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

As the name suggests, the subset of time-frequency space units is a subset of the set of time-frequency space units. The set of time-frequency space cells may comprise a plurality of subsets of time-frequency space cells. The network device and the terminal may preset indexes of the respective time-frequency space unit subsets, and the time-frequency space units included in the respective time-frequency space unit subsets. In this way, the terminal may enable the network device to learn which time-frequency-space unit subset the M time-frequency-space units are selected from by feeding back the index of the time-frequency-space unit subset to the network device.

Assuming that the set of time-frequency-space cells includes Q time-frequency-space cells, the set of time-frequency-space cells may be divided equally into P subsets of time-frequency-space cells, each subset of time-frequency-space cells including Q ₁ Time-frequency space unit, q=q ₁ X P. In this case, the overhead of the component information is:

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

Assuming that the set of time-frequency-space cells includes Q time-frequency-space cells, the set of time-frequency-space cells may be divided equally into P subsets of time-frequency-space cells, each subset of time-frequency-space cells including Q ₁ Time-frequency space unit, q=q ₁ X P. In this case, the number of combinations of M time-frequency space units is selected from the time-frequency space unit subset to beIt is understood that the combination of M time-frequency space units indicated by the component information is only +.>One of the combinations. This can be preset between the terminal and the network device>The index of each combination in the time-frequency space unit subsets is fed back by the terminal, so that the network equipment can determine the corresponding M time-frequency space units from the time-frequency space unit subsets.

It will be appreciated that in this case the overhead of the component information is:

(5) The component information includes: bitmap (bitmap) corresponding to the time-frequency empty unit set. And each q bits in the bitmap corresponding to the time-frequency space unit set corresponds to one time-frequency space unit in the time-frequency space unit set, wherein the value of the q bits is used for indicating whether the time-frequency space unit corresponding to the bits belongs to the M time-frequency space units or not, and q is a positive integer. For example, taking q=1 as an example, if a value of a certain bit in the bitmap is "0", the time-frequency space unit corresponding to the bit does not belong to the M time-frequency space units; and if the value of a certain bit in the bitmap is 1, the time-frequency space unit corresponding to the bit belongs to the M time-frequency space units.

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

(6) The component information includes: and indexing the time-frequency empty unit subset and a bitmap corresponding to the time-frequency empty unit subset. And each bit in the bitmap corresponding to the time-frequency space unit subset corresponds to one time-frequency space unit in the time-frequency space unit subset, and the value of each bit is used for indicating whether the time-frequency space unit corresponding to the bit belongs to the M time-frequency space units.

Assuming that the set of time-frequency-space cells includes Q time-frequency-space cells, the set of time-frequency-space cells may be divided equally into P subsets of time-frequency-space cells, each subset of time-frequency-space cells including Q ₁ Time-frequency space unit, q=q ₁ X P. In this case, the overhead of the component information is:/>

specific analysis is made above for the overhead of the component information in various cases. Hereinafter, the cost of other information (such as spatial base vector information, frequency domain base vector information, etc.) may refer to the analysis of the above, and is generally described herein, and will not be repeated herein.

Mode two, the component information is used to indicate L spatial basis vectors, K time domain basis vectors, and N frequency domain basis vectors. Wherein L, K, N is a positive integer. L, K, N is predefined or preconfigured by the network device. In the case where L, K, N is preconfigured by the network device, L, K, N may be indicated by the same information or may be indicated by different information, and embodiments of the present application are not limited thereto.

For convenience of description, information for indicating L spatial basis vectors in the component information is hereinafter abbreviated as spatial basis vector information, information for indicating K time domain basis vectors in the component information is abbreviated as time domain basis vector information, and information for indicating N frequency domain basis vectors in the component information is abbreviated as frequency domain basis vector information.

Alternatively, the spatial base vector information may include at least one of:

(1) Index of each spatial base vector in the set of spatial base vectors in the L spatial base vectors;

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

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

(4) Index of the subset of spatial basis vectors, index of the combination of the L spatial basis vectors in the subset of spatial basis vectors;

(5) Bitmap corresponding to airspace base vector set; wherein, each q bits in the bitmap corresponding to the space base vector set corresponds to one space base vector in the space base vector set, and the value of the q bits is used for indicating whether the corresponding space base vector belongs to the L space base vectors;

(6) Index of the space base vector subset and bitmap corresponding to the space base vector subset; and each q bits in the bitmap corresponding to the space base vector subset corresponds to one space base vector in the space base vector subset, and the value of the q bits is used for indicating whether the corresponding space base vector belongs to the L space base vectors.

Alternatively, the time domain basis vector information may include at least one of:

(1) An index of each of the K time domain basis vectors in the set of time domain basis vectors;

(2) An index of a combination of K time domain basis vectors in the set of time domain basis vectors;

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

(4) Index of subset of time domain basis vectors, index of combination of K time domain basis vectors in subset of time domain basis vectors;

(5) Bitmap corresponding to time domain base vector set; wherein, each q bits in the bitmap corresponding to the time domain base vector set corresponds to one time domain base vector in the time domain base vector set, and the value of the q bits is used for indicating whether the corresponding time domain base vector belongs to the K time domain base vectors;

(6) Indexing the time domain base vector subset and a bitmap corresponding to the time domain base vector subset; and each q bits in the bitmap corresponding to the time domain base vector subset corresponds to one time domain base vector in the time domain base vector subset, and the value of the q bits is used for indicating whether the corresponding time domain base vector belongs to the K time domain base vectors.

Alternatively, the frequency domain basis vector information may include at least one of:

(1) An index of each of the N frequency-domain basis vectors in the set of frequency-domain basis vectors;

(2) An index of a combination of the N frequency-domain basis vectors in the set of frequency-domain basis vectors;

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

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

(5) Bitmap corresponding to frequency domain base vector set; wherein, each q bits in the bitmap corresponding to the frequency domain base vector set corresponds to one frequency domain base vector in the frequency domain base vector set, and the value of the q bits is used for indicating whether the corresponding frequency domain base vector belongs to the N frequency domain base vectors;

(6) Index of frequency domain base vector subset, bitmap corresponding to frequency domain base vector subset; and each q bits in the bitmap corresponding to the frequency domain base vector subset corresponds to one frequency domain base vector in the frequency domain base vector subset, and the value of the q bits is used for indicating whether the corresponding frequency domain base vector belongs to the N frequency domain base vectors.

The L space-domain base vectors, the K time-domain base vectors, and the N frequency-domain base vectors can determine the l×k×n time-frequency space units. If lxkxn > M, the component information further includes: and the first position information is used for indicating the positions of the M time-frequency space units in the L multiplied by K multiplied by N time-frequency space units.

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

(1) A first bitmap, wherein each q bits in the first bitmap corresponds to one time-frequency space unit of L×K×N time-frequency space units, and the q bits are used for indicating whether the time-frequency space units belong to the M time-frequency space units;

(2) An index of a combination of M time-frequency space units in the lxkxn time-frequency space units;

(3) An index of each of the M time-frequency space units in the lxkxn time-frequency space units;

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

Mode three, component information is used to indicate L spatial basis vectors and X ₁ And a time-frequency unit. Therein, L, X ₁ Are all positive integers. L, X ₁ Is predefined or is preconfigured by the network device. At L, X ₁ L, X, in the case of being preconfigured by a network device ₁ May be indicated by the same information or may be indicated by different information, and embodiments of the present application are not limited thereto.

For convenience of description, information for indicating L spatial basis vectors in the component information will be hereinafter simply referred to as spatial basis vector information, and information for indicating X in the component information will be hereinafter referred to as spatial basis vector information ₁ The information of the individual time-frequency units is simply referred to as time-frequency unit information. It should be noted that, the specific implementation manner of the spatial base vector information may refer to the foregoing description, and will not be repeated herein.

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

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

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

(3) Indexing of time-frequency cell subsets and X ₁ An index of each of the time-frequency units in the subset of time-frequency units;

(4) Indexing of time-frequency cell subsets and X ₁ An index of a combination of time-frequency cells in a subset of time-frequency cells;

(5) Bitmap corresponding to time-frequency unit set; wherein each q bits 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 for indicating whether the corresponding time-frequency unit belongs to the X ₁ A plurality of time-frequency units;

(6) Index of time-frequency unit subset and bitmap corresponding to time-frequency unit subset; wherein each q bits in the bitmap corresponding to the time-frequency unit subset corresponds to one frequency domain base vector in the time-frequency unit subset, and the value of the q bits is used for indicating whether the corresponding time-frequency unit belongs to the X ₁ And a time-frequency unit.

L space base vectors and X ₁ The L X X can be determined by the time-frequency units ₁ And a time-frequency space unit. If L X X ₁ >M, the component information further includes: second position information for indicating that M time-frequency space units are in LxX ₁ Locations in the time-frequency space cell.

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

(1) A second bitmap, each q bits in the second bitmap and L X X ₁ One of the time-frequency space units corresponds to the q bits used for indicating whether the corresponding time-frequency space unit belongs to the M time-frequency space units or not;

(2) The combination of M time-frequency space units is L X X ₁ Indexes in the time-frequency space units;

(3) Each of M time-frequency space unitsThe L X is the time-frequency space unit ₁ Indexes in the time-frequency space units;

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

Mode four, component information is used to indicate K time domain basis vectors and X ₂ And a space frequency unit. Therein, L, X ₂ Are all positive integers. L, X ₂ Is predefined or is preconfigured by the network device. At L, X ₂ L, X, in the case of being preconfigured by a network device ₂ May be indicated by the same information or may be indicated by different information, and embodiments of the present application are not limited thereto.

For convenience of description, information for indicating K time domain base vectors in the component information will be hereinafter abbreviated as time domain base vector information, and information for indicating X in the component information ₂ The information of the individual space-frequency units is simply referred to as space-frequency unit information. It should be noted that, the specific implementation of the time domain base vector information may refer to the foregoing description, and will not be repeated herein.

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

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

(2)X ₂ an index of a combination of the individual space-frequency units in the set of space-frequency units;

(3) Index of subset of space-frequency units and X ₂ An index of each of the plurality of space-frequency units in a subset of the space-frequency units;

(4) Index of subset of space-frequency units and X ₂ An index of a combination of the individual space-frequency units in the subset of space-frequency units;

(5) Bitmap corresponding to space-frequency unit set; wherein each q bits in the bitmap corresponding to the space-frequency unit set corresponds to one space-frequency unit in the space-frequency unit set, and the value of the q bits is used for indicating whether the corresponding space-frequency unit belongs to the X ₂ A plurality of space frequency units;

(6) Index of the space frequency unit subset and bitmap corresponding to the space frequency unit subset; wherein each q bits in the bitmap corresponding to the space-frequency unit subset corresponds to one frequency domain base vector in the space-frequency unit subset, and the value of the q bits is used for indicating whether the corresponding space-frequency unit belongs to the X ₂ And a space frequency unit.

K time domain basis vectors and X ₂ The individual space-frequency units being able to determine KxX ₂ And a time-frequency space unit. If KxX ₂ >M, the component information further includes: third position information for indicating that M time-frequency space units are in KxX ₂ Locations in the time-frequency space cell.

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

(1) A third bitmap corresponding to KX every q bits ₂ One of the time-frequency space units, the q bits are used for indicating whether the corresponding time-frequency space unit belongs to the M time-frequency space units;

(2) The combination of M time-frequency space units is K X X ₂ Indexes in the time-frequency space units;

(3) Each of M time-frequency space units KX ₂ Indexes in the time-frequency space units;

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

Mode five, component information is used to indicate N frequency domain basis vectors and X ₃ And a space-time unit. Therein, L, X ₂ Are all positive integers. L, X ₂ Is predefined or is preconfigured by the network device. At L, X ₂ L, X, in the case of being preconfigured by a network device ₂ May be indicated by the same information or may be indicated by different information, and embodiments of the present application are not limited thereto.

For convenience of description, the followingThe information used for indicating N frequency domain base vectors in the component information is simply called frequency domain base vector information, and the information used for indicating X in the component information ₃ The information of the individual spatio-temporal units is simply referred to as spatio-temporal unit information. It should be noted that, the specific implementation of the frequency domain base vector information may refer to the foregoing description, and will not be repeated herein.

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

(1)X ₃ an index of each of the spatiotemporal cells in the spatiotemporal cell collection;

(2)X ₃ an index of a combination of the individual spatiotemporal units in the set of spatiotemporal units;

(3) Indexing of a subset of spatio-temporal elements and X ₃ An index of each of the spatiotemporal cells in the spatiotemporal cell subset;

(4) Indexing of a subset of spatio-temporal elements and X ₃ An index of a combination of the individual spatiotemporal units in a subset of the spatiotemporal units;

(5) Bitmap corresponding to space-time unit set; wherein each q bits in the bitmap corresponding to the space-time unit set corresponds to one space-time unit in the space-time unit set, and the value of the q bits is used for indicating whether the corresponding space-time unit belongs to the X ₃ A space-time unit;

(6) Indexing of the space-time unit subset and a bitmap corresponding to the space-time unit subset; wherein each bit in the bitmap corresponding to the space-time unit subset corresponds to a frequency domain base vector in the space-time unit subset, and the value of each bit is used for indicating whether the corresponding space-time unit belongs to the X ₃ And a space-time unit.

N frequency domain basis vectors and X ₃ The number of spatio-temporal elements being able to determine nxx ₃ And a time-frequency space unit. If N X X ₃ >M, the component information further includes: fourth position information for indicating that M time-frequency space units are in NxX ₃ Locations in the time-frequency space cell.

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

(1) A fourth bitmap, each q bits in the fourth bitmap corresponding to NxX ₃ One of the time-frequency space units, the q bits are used for indicating whether the corresponding time-frequency space unit belongs to the M time-frequency space units;

(2) The combination of M time-frequency space units is NxX ₃ Indexes in the time-frequency space units;

(3) Each of M time-frequency space units N X X ₃ Indexes in the time-frequency space units;

(4) The position of the frequency domain base vector corresponding to each time-frequency space unit in the M time-frequency space units in the N time-domain base vectors, and the position of the time-frequency space unit corresponding to each time-frequency space unit in the X ₃ Positions in the individual spatio-temporal cells.

The foregoing is an introduction to component information, and in a specific implementation, the terminal may also implement component information in other manners, which is not limited in this embodiment of the present application.

It can be understood that, in particular, the terminal implements the component information in any of the first to fifth modes, which may be defined by a protocol, or determined by negotiating between the terminal and the network device, or preconfigured to the terminal by the network device, which embodiments of the present application are not limited thereto.

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 not zero. In other words, the weighting coefficients of the M time-frequency space units are all weighting coefficients with non-zero amplitude.

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

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

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

(2) The coefficient information includes: position information of one or more normalized coefficients, and quantization information of each of the M weight coefficients other than the normalized coefficient.

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

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

Alternatively, the first normalization coefficient may be a weighting coefficient with the largest amplitude among the M weighting coefficients. The first normalization coefficient is used for performing normalization processing on each weighting coefficient in the M weighting coefficients.

The second normalization coefficient and the third normalization coefficient are described below with reference to fig. 5. Fig. 5 is a schematic diagram of a time-frequency space unit set according to an embodiment of the present application. Fig. 5 shows the position of a time-frequency space cell in a set of time-frequency space cells in a three-dimensional coordinate system. Where 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 cell. 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 a weighting coefficient with the largest amplitude among weighting coefficients corresponding to time-frequency space units located on the same plane in the M time-frequency space units. And the second normalization coefficient is used for performing normalization processing on the weighting coefficient corresponding to the time-frequency space unit in the same plane in the M time-frequency space units.

It will be appreciated that the plane may be a plane formed by a time domain dimension and a space domain dimension in a three-dimensional coordinate system, a plane formed by a time domain dimension and a frequency domain dimension, or a plane formed by a frequency domain dimension and a space domain dimension

The third normalization coefficient may be a weighting coefficient with the largest amplitude among weighting coefficients corresponding to time-frequency space units in the same row in the M time-frequency space units. And the third normalization coefficient is used for performing normalization processing on the weighting coefficient corresponding to the time-frequency space unit in the same row in the M time-frequency space units.

It is understood that the rows may be one row in the frequency domain dimension, one row in the time domain dimension, or one row in the spatial domain dimension.

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

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

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

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

Note that the arrangement order of the respective weighting coefficients in the coefficient information may be predefined. In this way, the terminal or the network device can respectively instruct and analyze quantization information of the respective weighting coefficients based on the same arrangement order.

Optionally, the first indication information is further used for indicating 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 magnitudes of the weighting coefficients of the R time-frequency space units is zero.

It can be appreciated how the first indication information indicates R time-frequency space units may refer to the foregoing description, and will not be described herein.

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

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

(1) The system information includes: quantization information for each of the m+r weighting coefficients.

(2) The system information includes: position information of one or more normalized coefficients, and quantization information of each of the m+r weighting coefficients other than the normalized coefficient.

(3) The coefficient information includes: position information of one or more normalized coefficients, and quantization information of each of the M weighting coefficients other than the normalized coefficient.

Optionally, in the above modes (1) to (3), the coefficient information is further used to indicate the value of R. That is, the coefficient information is also used to indicate the number of weighting coefficients whose magnitudes are non-zero among the m+r weighting coefficients.

Optionally, in the above modes (1) to (3), the coefficient information further includes a bitmap for indicating the number and positions of weighting coefficients having a magnitude other than zero among the m+r weighting coefficients, and the number and positions of weighting coefficients having a magnitude of zero.

Note that, for a specific description of the coefficient information for indicating the weighting coefficients of the m+r time-frequency space units, reference may be made to the specific description of the coefficient information for indicating the weighting coefficients of the M time-frequency space units in the foregoing, which is not described herein.

S102, the terminal sends first indication information to the network equipment.

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

Alternatively, the first indication information may be PMI, or a part of cells in PMI, or other indication information other than PMI, which is not limited in this embodiment.

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

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

The network device may then construct a precoding matrix (or precoding vector) from 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 employ a time-frequency space codebook as follows. It is to be understood that the time-frequency space codebook is merely to distinguish from the exemplary names set forth in the type I codebook and the type II codebook, and that the time-frequency space codebook may have other names, and embodiments of the present application are not limited thereto.

The time-frequency space codebook may be:

α _m an mth weighting coefficient of the M weighting coefficients; v (V) _m The M-th time-frequency space unit in the M time-frequency space units; v (V) _m When the space-time matrix is used as the time-frequency space matrix, H is a precoding matrix; v (V) _m When the precoding vector is a time-frequency space vector, H is a precoding vector.

The above formula (1) can be modified into the following formula (2) or (6). Wherein, in the formula (2),the method comprises the steps of taking a precoding matrix as a three-dimensional matrix; in formula (3), H ^all Is a precoding vector. In the formulas (4) to (6),all represent a precoding matrix, which is a two-dimensional matrix.

Alternatively, the above formula (2) may be modified into the following formula (7).

Wherein,the first space base vector in the L space base vectors; />An nth frequency domain base vector of the N frequency domain base vectors; />A kth time domain basis vector of the K time domain basis vectors; alpha _n,l,k The weighting coefficients corresponding to the first space domain base vector, the nth frequency domain base vector and the kth time domain base 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 base vector, a time domain base vector and a space domain base vector, and the time domain base vector can represent a change rule of a channel in a time domain, a precoding matrix (or a precoding vector) determined by the M time-frequency space units indicated by the first indication information and M weighting coefficients can be matched with a channel that changes with time by a terminal, so that normal communication between the network device and the terminal is ensured.

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

S201, the network equipment sends second indication information to the terminal.

The second indication information is used for configuring 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 for indicating the terminal to detect the reference signals of n time units and determining the channel state information. Wherein the channel state information includes first indication information.

In the 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 indicate the value of n in an explicit manner, for example, the configuration information includes the value of n. Alternatively, the configuration information may indicate the value of n in an implicit manner, e.g., 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 is specifically included in the configuration information to indicate the value of n. The configuration information may be the second indication information or other information, and the embodiment of the present application is not limited thereto.

Alternatively, the n time units may be continuous or discontinuous. Illustratively, taking the example that the time unit is an OFDM symbol, assume that n is 3, and n time units are OFDM symbol #1, OFDM symbol #2, and OFDM symbol #3; alternatively, the n time units are OFDM symbol #1, OFDM symbol #3, and OFDM symbol #5.

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

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

Based on the technical scheme shown in fig. 6, the network device sends the 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, a precoding matrix (or a precoding vector) adopted by the network device can be ensured to be matched with a channel changed by the terminal along with time, and normal communication between the network device and the terminal is ensured.

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

S301, the network equipment sends reference signal resource configuration information to the terminal.

The reference signal resource configuration information is used for configuring 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 allocation information may be CSI reporting setting as described above or part of the cells in CSI reporting setting as described above.

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

in the first case, the reference signal resource configuration information is used to configure a plurality of reference signal resource sets, where the plurality of reference signal resource sets correspond to different time units. That is, one reference signal resource set corresponds to one time unit. Thus, if two reference signal resources belong to different reference signal resource sets, the two reference signal resources correspond to different time units. If the two reference signal resources belong to the same reference signal resource set, the two reference signal resources correspond to the same time unit.

In the second case, the reference signal resource configuration information is used for configuring a reference signal resource set, where the reference signal resource set includes a plurality of reference signal resources, and the plurality of reference signal resources correspond to different time units.

It may be appreciated that the plurality of reference signal resources correspond to different time units, specifically that the configurations of the plurality of 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 for indicating a difference value between a time domain resource corresponding to the reference signal resource and a time domain initial symbol. For example, if the time domain start symbol is OFDM symbol #1 and the time domain offset value is 3, the time domain resource corresponding to the reference signal resource is OFDM #4.

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

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

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

If the time domain behavior reported by the CSI is non-periodic, for the first case, the number of reference signal resource sets configured by the reference signal resource is n or more, that is, the number of reference signal resource sets configured by the reference signal resource configuration information is n or more, that is, the number of time units needed by the terminal to perform reference signal measurement. Alternatively, in this case, the network device may send trigger information to the terminal to indicate the identity of the n reference signal resource sets for the CM. In this way, for each of the n reference signal resource sets, the terminal may select one or more reference signal resources from the reference signal resource sets for reference signal reception and measurement.

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

Optionally, the trigger information may also be used to indicate n reference signal resources for the CM. In this case, the terminal can perform reception and measurement of the reference signal with n reference signal resources indicated by the trigger information.

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

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

Based on the technical solution shown in fig. 7, the network device configures reference signal resources of a plurality of time units for the terminal by sending reference signal resource configuration information to the terminal, so that the terminal can measure reference signals of the plurality of time units, thereby determining channel state information based on the plurality of time units.

The above description has been presented mainly from the point of interaction between each network element. It will be understood that each network element, such as network devices and terminals, for implementing the above-described functions, includes corresponding hardware structures and/or software modules that perform each function. Those of skill in the art will readily appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the application may divide the functional modules of the network device and the terminal according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation. The following description will take an example of dividing each functional module into corresponding functional modules:

Fig. 8 is a schematic structural diagram of a terminal according to an embodiment of the present application. As shown in fig. 8, the terminal includes a communication module 801 and a processing module 802. The communication module 801 is configured to support the terminal to perform step S102 in fig. 4, step S201 in fig. 6, step S301 in fig. 7, and/or other processes for the technical solutions described herein. The processing module 802 is configured to support the terminal to perform step S101 in fig. 4, and/or other processes for the technical solution described herein. All relevant contents of each step related to the above method embodiment may be cited to the functional descriptions of the corresponding functional modules, which are not described herein.

As an example, in connection 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, which is not limited in any way by the embodiments of the present application.

Embodiments of the present application also provide a computer-readable storage medium having computer instructions stored therein; the computer readable storage medium, when run on the terminal shown in fig. 2, causes the terminal to perform the methods shown in fig. 4, 6 and 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 one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more servers, data centers, etc. that can be integrated with the medium. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium, or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

The embodiment of the application also provides a chip, which comprises a processing module and a communication interface, wherein the communication interface is used for transmitting received code instructions to the processing module, the code instructions can be from a memory inside the chip or from a memory outside the chip or other devices, and the processing module is used for executing the code instructions and supporting the terminal to execute the methods shown in fig. 4, 6 and 7. Wherein the processing module is an integrated processor or microprocessor or integrated circuit on the chip. The communication interface may be an input-output circuit or a transceiver pin.

Embodiments of the present application also provide a computer program product comprising computer instructions which, when run on the terminal shown in fig. 2, enable the terminal to perform the methods shown in fig. 4, 6 and 7.

The terminal, the computer storage medium, the chip and the computer program product provided in the embodiments of the present application are all configured to execute the method provided above, so that the beneficial effects achieved by the method provided above can be referred to as the beneficial effects corresponding to the method provided above, and are not described herein again.

Fig. 9 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown in fig. 9, the network device includes a communication module 901 and a processing module 902. The communication module is configured to support the network device to perform step S102 in fig. 4, step S201 in fig. 6, step S301 in fig. 7, and/or other processes for the technical solutions described herein. The processing module 902 is configured to support the network device to perform step S104 in fig. 4, and/or other processes for the technical solutions described herein. All relevant contents of each step related to the above method embodiment may be cited to the functional descriptions of the corresponding functional modules, which are not described herein.

As an example, in connection with the network device shown in fig. 2, the communication module 901 in fig. 9 may be implemented by the transceiver 203 in fig. 2, and the processing module 902 in fig. 9 may be implemented by the processor 201 in fig. 2, which is not limited in any way by the embodiments of the present application.

Embodiments of the present application also provide a computer-readable storage medium having computer instructions stored therein; the computer readable storage medium, when run on the network device shown in fig. 2, causes the network device to perform the methods shown in fig. 4, 6 and 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 one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more servers, data centers, etc. that can be integrated with the medium. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium, or a semiconductor medium (e.g., solid state disk), etc.

The embodiment of the application also provides a chip, which comprises a processing module and a communication interface, wherein the communication interface is used for transmitting received code instructions to the processing module, the code instructions can be from a memory inside the chip or from a memory outside the chip or other devices, and the processing module is used for executing the code instructions and is used for supporting a network device to execute the method shown in fig. 4, 6 and 7. Wherein the processing module is an integrated processor or microprocessor or integrated circuit on the chip. The communication interface may be an input-output circuit or a transceiver pin.

Embodiments of the present application also provide a computer program product comprising computer instructions that, when run on a network device as shown in fig. 2, enable the network device to perform the methods shown in fig. 4, 6 and 7.

The network device, the computer storage medium, the chip and the computer program product provided in the embodiments of the present application are all configured to execute the method provided above, so that the beneficial effects achieved by the network device, the computer storage medium, the chip and the computer program product can refer to the beneficial effects corresponding to the method provided above, and are not described herein again.

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

Although the present application has been described in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely exemplary illustrations of the present application as defined in the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the present application. It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. An information feedback method, characterized in that the method comprises:

detecting reference signals of n time units, wherein n is an integer greater than 1;

determining first indication information according to the reference signals of the n time units, wherein the first indication information is used for indicating M time-frequency space units and weighting coefficients of the M time-frequency space units; a time-frequency space unit is determined according to a time-domain base vector, a frequency-domain base vector and a space-domain base vector, and M is a positive integer; and

And sending the first indication information.

2. The information feedback method of claim 1, wherein,

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

the first indication information is used for indicating indexes of M time-frequency space units in a time-frequency space unit subset.

3. The information feedback method of claim 1, wherein,

the first indication information is used for indicating L space domain base vectors, K time domain base vectors and N frequency domain base vectors; or,

the first indication information is used for indicating L airspace base directionsAmount and X ₁ A plurality of time-frequency units; a time-frequency unit is determined by a time-domain basis vector and a frequency-domain basis vector; or,

the first indication information is used for indicating K time domain base vectors and X ₂ A plurality of space frequency units; a space frequency unit is determined by a space base vector and a frequency domain base vector; or,

the first indication information is used for indicating N frequency domain base vectors and X ₃ A space-time unit; a space-time unit is defined by a time-domain basis vector and a space-domain basis vector;

therein, L, K, N, X ₁ 、X ₂ X is as follows ₃ Are all positive integers.

4. An information feedback method according to any of claims 1 to 3, further comprising, prior to determining the first indication information:

receiving second indication information, wherein the second indication information is used for configuring a preset channel state information feedback mode;

if the terminal adopts a preset channel state information feedback mode, detecting the reference signals of the n time units.

5. The information feedback method according to claim 4, wherein the second indication information is carried in codebook indication information, and the codebook indication information is used for indicating a codebook type used by the terminal.

6. The information feedback method according to claim 5, wherein the second indication information is further used to indicate the value of n.

7. The information feedback method according to any one of claims 1-3, 5-6, further comprising:

and receiving reference signal resource configuration information, wherein the reference signal resource configuration information is used for configuring a reference signal resource set, the reference signal resource set comprises a plurality of reference signal resources, and the plurality of reference signal resources correspond to different time units.

8. The information feedback method according to any one of claims 1-3, 5-6, further comprising:

And receiving reference signal resource configuration information, wherein the reference signal resource configuration information is used for configuring a plurality of reference signal resource sets, and the plurality of reference signal resource sets correspond to different time units.

9. An information feedback method, characterized in that the method comprises:

receiving first indication information, wherein the first indication information is used for indicating M time-frequency space units and weighting coefficients of the M time-frequency space units; a time-frequency space unit is determined according to a time-domain base vector, a frequency-domain base vector and a space-domain base vector, and M is a positive integer; the first indication information is determined based on detection of reference signals of n time units by the terminal, wherein n is an integer greater than 1;

and determining the M time-frequency space units and the weighting coefficients of the M time-frequency space units according to the first indication information.

10. The information feedback method of claim 9, wherein,

the first indication information is used for indicating indexes of M time-frequency space units in a subset of a time-frequency space unit set.

11. The information feedback method of claim 9, wherein,

the first indication information is used for indicating L space base vectors and X ₁ A plurality of time-frequency units;a time-frequency unit is determined by a time-domain basis vector and a frequency-domain basis vector; or,

therein, L, K, N, X ₁ 、X ₂ X is as follows ₃ Are all positive integers.

12. The information feedback method according to any one of claims 9 to 11, characterized in that the method further comprises:

transmitting second indication information, wherein the second indication information is used for configuring a preset channel state information feedback mode; the preset channel state information feedback mode is used for indicating the terminal to detect the reference signals of the n time units and determining the first indication information.

13. 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 for indicating a codebook type used by the terminal.

14. The information feedback method of claim 13, wherein the second indication information is further used to indicate the value of n.

15. The information feedback method according to any one of claims 9-11, 13-14, characterized in that the method further comprises:

and transmitting reference signal resource configuration information, wherein the reference signal resource configuration information is used for configuring a reference signal resource set, the reference signal resource set comprises a plurality of reference signal resources, and the plurality of reference signal resources correspond to different time units.

16. The information feedback method according to any one of claims 9-11, 13-14, characterized in that the method further comprises:

and transmitting reference signal resource configuration information, wherein the reference signal resource configuration information is used for configuring a plurality of reference signal resource sets, and the plurality of reference signal resource sets correspond to different time units.

17. A terminal, comprising:

the processing module is used for detecting reference signals of n time units, wherein n is an integer greater than 1;

the processing module is further configured to determine first indication information according to the reference signals of the n time units, 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 determined according to a time-domain base vector, a frequency-domain base vector and a space-domain base vector, and M is a positive integer;

And the communication module is used for sending the first indication information.

18. The terminal of claim 17, wherein the terminal comprises a base station,

19. The terminal of claim 17, wherein the terminal comprises a base station,

the first indication information is used for indicating L space base vectors and X ₁ A plurality of time-frequency units; a time-frequency unit is determined by a time-domain basis vector and a frequency-domain basis vector;or,

therein, L, K, N, X ₁ 、X ₂ X is as follows ₃ Are all positive integers.

20. A terminal according to any one of claims 17 to 19, characterized in that,

the communication module is further configured to receive second indication information, where the second indication information is used to configure a preset channel state information feedback mode;

the processing module is further configured to detect the reference signals of the n time units if a preset channel state information feedback mode is adopted.

21. The terminal of claim 20, wherein the second indication information is carried in codebook indication information, and the codebook indication information is used for indicating a codebook type used by the terminal.

22. The terminal of claim 21, wherein the second indication information is further used to indicate the value of n.

23. The terminal according to any of the claims 17-19, 21-22, characterized in that,

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, the reference signal resource set includes a plurality of reference signal resources, and the plurality of reference signal resources correspond to different time units.

24. The terminal according to any of the claims 17-19, 21-22, characterized in that,

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 plurality of reference signal resource sets, and the plurality of reference signal resource sets correspond to different time units.

25. A network device, comprising:

the communication module is used for receiving first indication information, wherein the first indication information is used for indicating M time-frequency space units and weighting coefficients of the M time-frequency space units; a time-frequency space unit is determined according to a time-domain base vector, a frequency-domain base vector and a space-domain base vector, and M is a positive integer; the first indication information is determined based on detection of reference signals of n time units by the terminal, wherein n is an integer greater than 1;

and the processing module is used for determining the M time-frequency space units and the weighting coefficients of the M time-frequency space units according to the first indication information.

26. The network device of claim 25, wherein the network device,

27. The network device of claim 25, wherein the network device,

the first indication information is used for indicating L space base vectors and X ₁ A plurality of time-frequency units; a time-frequency unit is determined by a time-domain basis vector and a frequency-domain basis vector; or,

the first indication information is used forIndicating K time domain basis vectors and X ₂ A plurality of space frequency units; a space frequency unit is determined by a space base vector and a frequency domain base vector; or,

therein, L, K, N, X ₁ 、X ₂ X is as follows ₃ Are all positive integers.

28. The network device of 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 for indicating the terminal to detect the reference signals of the n time units and determining the first indication information.

29. The network device of claim 28, wherein the second indication information is carried in codebook indication information, the codebook indication information being used to indicate a codebook type used by a terminal.

30. The network device of claim 29, wherein the second indication information is further configured to indicate the value of n.

31. The network device of any one of claims 25-27, 29-30,

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 a plurality of reference signal resources, and the plurality of reference signal resources correspond to different time units.

32. The network device of any one of claims 25-27, 29-30,

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

33. A computer readable storage medium having instructions stored therein which, when executed on a communication device, cause the communication device to perform the method of any of claims 1 to 8 or cause the communication device to perform the method of any of claims 9 to 16.