CN113302870B

CN113302870B - Method and device for reporting channel state information

Info

Publication number: CN113302870B
Application number: CN201980089297.4A
Authority: CN
Inventors: 李雪茹; 张瑞齐; 周永行
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-02-01
Filing date: 2019-02-01
Publication date: 2022-10-11
Anticipated expiration: 2039-02-01
Also published as: CN115834017A; WO2020155119A1; CN113302870A

Abstract

The application provides a method and a device for reporting channel state information, which are beneficial to improving the matching degree of CSI applied by network equipment and a channel at the current moment, and further improving the data transmission performance. The method comprises the following steps: the network equipment sends first indication information, the terminal equipment receives the first indication information, and the first indication information is used for indicating K reporting time unit offsets n _i I =1,2, …, K; the network equipment sends second indication information, the terminal equipment receives the second indication information, and the second indication information is used for indicating K in K reporting time unit offsets ₁ One reporting time unit offset

q＝1,2,...,K ₁ ，i _q ∈{1,2,...,K}，K ₁ Less than K; the terminal equipment sends first CSI on a time unit marked as n, and the network equipment receives the first CSI, wherein the first CSI represents K ₁ CSI of one reference time unit, K ₁ Identification of the qth one of the reference time units as

Description

Method and device for reporting channel state information

Technical Field

The present application relates to the field of communications, and in particular, to a method and an apparatus for reporting channel state information in the field of communications.

Background

Channel State Information (CSI) is used to indicate channel properties of a communication link, and the accuracy of CSI acquired by a network device determines the performance of the communication system to a large extent. In general, in a Frequency Division Duplex (FDD) system or a Time Division Duplex (TDD) system with poor channel reciprocity, a terminal device needs to measure CSI and report the CSI to a network device.

The CSI fed back by the terminal device is sensitive to the time delay, and particularly for the terminal device with a high moving speed, since the CSI reflects the channel state at a fixed time, if the channel changes due to the movement of the terminal device, the CSI received by the network device cannot completely reflect the channel state at the current time. In this case, if the network device directly applies the CSI fed back by the terminal device, the matching degree between the CSI and the channel at the current time may be reduced, which affects the data transmission performance.

Disclosure of Invention

The application provides a method and a device for reporting channel state information, which are beneficial to improving the matching degree of CSI applied by network equipment and a channel at the current moment, and further improving the data transmission performance.

In a first aspect, a method for reporting channel state information is provided, including: the terminal equipment receives first indication information, wherein the first indication information is used for indicating K reporting time unit offsets n _i ，i＝1,2,…,K，n _i Is a non-zero integer, K is an integer greater than or equal to 2; the terminal equipment receives second indication information, wherein the second indication information is used for indicating K in the K reporting time unit offsets ₁ One reporting time unit offset

q＝1,2,...,K ₁ ，i _q ∈{1,2,...,K}，K ₁ Is a positive integer less than K; the terminal equipment sends first Channel State Information (CSI) on a time unit marked as n, wherein the first CSI represents K ₁ CSI of a reference time unit, said K ₁ The identity of the qth reference time unit of the reference time units is

n is an integer greater than or equal to 0.

According to the embodiment of the application, the first indication information indicates at least two reporting time unit offsets, and the reporting time unit offsets corresponding to the CSI reported by the terminal equipment are further selected through the second indication information, so that the network equipment can flexibly select the reference time unit according to needs, the matching degree of the CSI applied by the network equipment and the current channel is favorably improved, and the data transmission performance is improved.

It should be understood that K is as defined above ₁ The CSI of each reference time unit includes K ₁ The CSI for each of the reference time units, collectively referred to herein as the first CSI. The first CSI comprises K ₁ The CSI of each reference time unit in each reference time unit may be the first CSI formed by compressing the CSI of each reference time unit, or the first CSI formed by not compressing the CSI of each reference time unit, which is not limited in this application.

For example, the first indication information may be Radio Resource Control (RRC) signaling, and the second indication information may be a medium access control element (MAC CE) or Downlink Control Information (DCI).

For example, the first indication information may be a MAC CE, and the second indication information may be DCI.

In one possible implementation, in the above

K of ₁ Get oneIn the value, at least one

The CSI reported by the terminal device includes at least one predicted value of CSI at a future time (also referred to as predicted CSI), and the network device may schedule the terminal device to perform data transmission at a time corresponding to the predicted value of CSI (or a time near the scheduling time) according to the predicted value of CSI. Because the terminal equipment has the unquantized CSI, the terminal equipment carries out CSI prediction based on the unquantized CSI, so that better prediction performance can be obtained, and the accuracy of the CSI is improved.

In another possible implementation, the above

Are all less than zero, K ₁ The CSI reported by the terminal device includes at least two CSI measurement values at historical times, and the network device can predict the CSI at the future time according to the at least two CSI measurement values at historical times, so as to obtain the CSI prediction values at other times, and schedule the terminal device to perform data transmission at the corresponding time. The CSI prediction by the network device can reduce the computational complexity of the terminal device, thereby reducing the power consumption of the terminal device.

In another possible implementation, the above

Are all greater than zero, K ₁ The CSI reported by the terminal device is greater than or equal to 2, that is, the first CSI includes predicted values of CSI at least two future times. At this time, the terminal device predicts the CSI and reports the prediction result to the network device. The at least two future moments may be moments when the network device considers that data scheduling will be performed, and the network device may perform precoding of downlink data directly according to the report of the terminal device without further prediction. Since the terminal device has unquantized CSI, better prediction performance can be obtained by performing CSI prediction based on the unquantized CSI.

Optionally, after receiving the first CSI reported by the terminal device, the network device may also perform prediction of CSI at other times according to predicted values of CSI at least two future times included in the first CSI. For example, the network device may obtain the CSI of other time instants between the two future time instants or the CSI of other time instants after the two future time instants through interpolation. Therefore, the constraint of the time for scheduling the data of the network equipment can be reduced, and a more flexible scheduling strategy is matched.

With reference to the first aspect, in certain implementations of the first aspect, the second indication information is used to indicate K ₂ Reporting the K in a time unit offset ₁ A reported time unit offset, K ₂ The one reporting time unit offset belongs to the K reporting time unit offsets, K ₂ Is a positive integer less than K, and K ₁ Less than K ₂ (ii) a The method further comprises the following steps: the terminal device receives third indication information, where the third indication information is used to indicate the K reporting time unit offsets of the K reporting time unit offsets ₂ Reporting time unit offset.

Specifically, the network device may first send the first indication information to indicate K reporting time unit offsets, and then send the third indication information to indicate K of the K reporting time unit offsets ₂ Reporting time unit deviation, and then sending a second indication information indication K ₂ K in one reported time unit offset ₁ Reporting time unit offset. Namely, the K corresponding to the CSI which is finally required to be reported by the terminal equipment is selected through a three-level indication mode ₁ Reporting time unit offset. Thus, K ₁ <K ₂ <K。

Illustratively, the first indication information is RRC signaling, the third indication information is MAC CE or DCI, and the second indication information is MAC CE or DCI.

With reference to the first aspect, in some implementations of the first aspect, the second indication information is further used to instruct the terminal device to send the first CSI.

In the embodiment of the application, the network equipment canTo select K through the third indication information ₂ And the terminal equipment can start parameter training of the first CSI or parameter calculation of the first CSI according to the third indication information. When the terminal device receives second indication information which is sent by the network device and used for triggering CSI reporting, the relevant parameters of the first CSI are already calculated, and the first CSI can be calculated quickly, so that the CSI reporting time delay is reduced, and the CSI reporting timeliness is improved.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: and the terminal equipment receives fourth indication information, wherein the fourth indication information is used for indicating the terminal equipment to send the first CSI.

Illustratively, the first indication information is RRC signaling, the second indication information is MAC CE or DCI, and the fourth indication information is DCI.

It should be understood that when the reporting of the first CSI is semi-persistent CSI reporting or aperiodic CSI reporting, the network device needs to send signaling to the terminal device to trigger the reporting of the first CSI. The signaling for triggering CSI reporting may be the second indication information, or may also be other information different from the second indication information, for example, the fourth indication information, which is not limited in this embodiment of the present application.

With reference to the first aspect, in certain implementation manners of the first aspect, the first indication information is used to indicate M reporting time unit offset sets, where reporting time unit offsets included in the M reporting time unit offset sets are the K reporting time unit offsets, and an mth reporting time unit offset set in the M reporting time unit offset sets includes x reporting time unit offsets _m One reporting time unit offset, and at least one x exists _m Is greater than or equal to 2, M is an integer greater than 1, x _m Is a positive integer less than K, M =1,2, …, M.

Specifically, the K reporting time unit offsets indicated by the first indication information are reporting time unit offsets in M reporting time unit offset sets, that is, the K reporting time unit offsets and M reporting timesThe inter-cell offset set is equivalent. Therefore, the network device may indicate the M reporting time unit offset sets through the first indication information, and the terminal device may determine the K reporting time unit offsets according to the M reporting time unit offset sets. In this embodiment, the mth reporting time unit offset set of the M reporting time unit offset sets includes x _m One reporting time unit offset, and at least one x exists _m If M is greater than or equal to 2, M is smaller than K, and thus, by performing the indication in a collective manner, K indicated in the subsequent second indication information can be reduced ₁ Signaling overhead of individual reference time units.

With reference to the first aspect, in certain implementation manners of the first aspect, the second indication information is used to indicate M of the M reporting time unit offset sets ₁ A reporting time unit offset set, M ₁ The reporting time unit offset included in each reporting time unit offset set is K ₁ Individual reported time unit offset, M ₁ Is a positive integer less than M.

Specifically, the second indication information indicates K of K reporting time unit offsets ₁ The network device may indicate, by the second indication information, M of the M reporting time unit offset sets when the K reporting time unit offsets correspond to the M reporting time unit offset sets ₁ Reporting a time unit offset set. At this time, the network device only needs to report the identifier of the time unit offset set to indicate M ₁ And reporting the time unit offset set, thereby saving signaling overhead.

With reference to the first aspect, in certain implementation manners of the first aspect, the third indication information is used to indicate M reporting time unit offset sets of the M reporting time unit offset sets ₂ A reporting time unit offset set, the second indication information being used for indicating M ₂ Reporting the M in a time unit offset set ₁ A reporting time unit offset set, M ₂ The reporting time unit offset included in each reporting time unit offset set is K ₂ Individual reported time unit offset, M ₂ Is a positive integer less than M, and M ₁ Less than M ₂ 。

With reference to the first aspect, in some implementation manners of the first aspect, a jth reporting time unit offset n of the K reporting time unit offsets _j ＝n ₁ P is a positive integer, and j is an integer of {1,2, …, K }.

Specifically, the K reporting time unit offsets are equally spaced, and the interval is P, so that the network device may only configure one reporting time unit offset n with the minimum identifier for the terminal device ₁ And an interval P, the terminal equipment can calculate other reporting time unit offsets in the K reporting time unit offsets according to the formula. Therefore, the embodiment of the application configures the K reporting time unit offsets to be equally spaced, which is beneficial to saving signaling overhead for configuring the K reporting time unit offsets by the network device. And measuring the CSI of the reference time unit at equal intervals is beneficial to the terminal equipment and/or the network equipment to predict the CSI, and the prediction accuracy is improved.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal equipment reports capability information, and the capability information is used for indicating the maximum value of K supported by the terminal equipment and/or K ₁ Of (c) is calculated.

Therefore, the number of the reporting time unit offsets configured for the terminal equipment by the network equipment can be matched with the actual situation of the terminal equipment, and the situation that the terminal equipment cannot report more CSI due to more reporting time unit offsets configured for the network equipment is avoided.

In a second aspect, another method for reporting channel state information is provided, including: the network equipment sends first indication information, wherein the first indication information is used for indicating K reporting time unit offsets n _i ，i＝1,2,…,K，n _i Is a non-zero integer, K is an integer greater than or equal to 2; the network equipment sends second indication information, where the second indication information is used to indicate K in the K reporting time unit offsets ₁ A reported time unit offset

q＝1,2,...,K ₁ ，i _q ∈{1,2,...,K}，K ₁ Is a positive integer less than K; the network equipment receives first Channel State Information (CSI) on a time unit marked as n, wherein the first CSI represents K ₁ CSI of one reference time unit, the K ₁ Identification of the qth one of the reference time units as

n is an integer greater than or equal to 0.

With reference to the second aspect, in certain implementations of the second aspect, the second indication information is used to indicate K ₂ Reporting the K in a time unit offset ₁ A reported time unit offset, said K ₂ The one reporting time unit offset belongs to the K reporting time unit offsets, K ₂ Is a positive integer less than K, and K ₁ Less than K ₂ (ii) a The method further comprises the following steps: the network device sends third indication information, where the third indication information is used to indicate the K reporting time unit offsets of the K reporting time unit offsets ₂ Reporting time unit offset.

With reference to the second aspect, in some implementations of the second aspect, the second indication information is further used to instruct a terminal device to send the first CSI.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: and the network equipment sends fourth indication information, wherein the fourth indication information is used for indicating terminal equipment to send the first CSI.

In combination with the second aspectIn some implementation manners of the second aspect, the first indication information is used to indicate M reporting time unit offset sets, where reporting time unit offsets included in the M reporting time unit offset sets are the K reporting time unit offsets, and an mth reporting time unit offset set in the M reporting time unit offset sets includes x reporting time unit offsets _m One reporting time unit offset, and at least one x exists _m Is greater than or equal to 2, M is an integer greater than 1, x _m Is a positive integer less than K, M =1,2, …, M.

With reference to the second aspect, in some implementations of the second aspect, the second indication information is used to indicate M of the M reporting time unit offset sets ₁ A reporting time unit offset set, M ₁ The reporting time unit offset included in each reporting time unit offset set is K ₁ Individual reported time unit offset, M ₁ Is a positive integer less than M.

With reference to the second aspect, in some implementation manners of the second aspect, a jth reporting time unit offset n of the K reporting time unit offsets _j ＝n ₁ P is a positive integer, and j is an integer of {1,2, …, K }.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the network equipment receives capability information, and the capability information is used for indicating the maximum value of K supported by the terminal equipment and/or K ₁ Is measured.

In a third aspect, an apparatus for reporting channel state information is provided, configured to perform the method in any possible implementation manner in the foregoing aspects. In particular, the apparatus comprises means for performing the method in any one of the possible implementations of the aspects described above.

In a fourth aspect, another apparatus for reporting channel state information is provided, where the apparatus includes: a transceiver, a memory, and a processor. Wherein the transceiver, the memory, and the processor communicate with each other through an internal connection path, the memory is configured to store instructions, the processor is configured to execute the instructions stored by the memory to control the receiver to receive signals and control the transmitter to transmit signals, and the processor is configured to execute the instructions stored by the memory to cause the processor to perform the method of any one of the possible implementations of the above aspects.

In a fifth aspect, there is provided a computer program product comprising: computer program code which, when run by a computer, causes the computer to perform the method of any one of the possible implementations of the aspects described above.

A sixth aspect provides a computer readable medium for storing a computer program comprising instructions for performing the method of any one of the possible implementations of the above aspects.

In a seventh aspect, a chip is provided, which includes: the system comprises an input interface, an output interface, at least one processor and a memory, wherein the input interface, the output interface, the processor and the memory are connected through an internal connection path, the processor is used for executing codes in the memory, and when the codes are executed, the processor is used for executing the method in any one of the possible implementation manners of the aspects.

Drawings

Fig. 1 shows a schematic diagram of a communication system of an embodiment of the present application.

Fig. 2 shows a schematic diagram of a time cell of an embodiment of the application.

Fig. 3 shows a schematic diagram of a reference time unit according to an embodiment of the present application.

FIG. 4 shows a schematic diagram of another reference time cell of an embodiment of the present application.

Fig. 5 is a schematic flowchart illustrating a method for reporting channel state information according to an embodiment of the present application.

Fig. 6 is a diagram illustrating a relationship between reporting time unit offsets according to an embodiment of the present application.

FIG. 7 shows a schematic diagram of multiple reference time cells of an embodiment of the present application.

Fig. 8 is a schematic flow chart of another method for reporting channel state information according to an embodiment of the present application.

Fig. 9 is a schematic block diagram illustrating an apparatus for reporting channel state information according to an embodiment of the present application.

Fig. 10 is a schematic block diagram illustrating another apparatus for reporting channel state information according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (GSM) systems, code Division Multiple Access (CDMA) systems, wideband Code Division Multiple Access (WCDMA) systems, general Packet Radio Service (GPRS), long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD), universal mobile telecommunications system (universal mobile telecommunications system, UMTS), worldwide Interoperability for Microwave Access (WiMAX) communication systems, future fifth generation (5 g) or new radio NR systems, etc.

It should also be understood that the technical solution of the embodiment of the present application may also be applied to various communication systems based on non-orthogonal multiple access technologies, such as Sparse Code Multiple Access (SCMA) systems, and certainly SCMA may also be referred to as other names in the communication field; further, the technical solution of the embodiment of the present application may be applied to a multi-carrier transmission system using a non-orthogonal multiple access technology, for example, an Orthogonal Frequency Division Multiplexing (OFDM) system using a non-orthogonal multiple access technology, a filter bank multi-carrier (FBMC), a General Frequency Division Multiplexing (GFDM) system, a filtered orthogonal frequency division multiplexing (F-OFDM) system, and the like.

The terminal device in this embodiment may communicate with one or more core networks through a Radio Access Network (RAN), and may be referred to as an access terminal, a User Equipment (UE), a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), etc.

The network device in this embodiment may be a device for communicating with a terminal device, and the network device may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) system or a Code Division Multiple Access (CDMA) system, may also be a base station (NodeB) in a Wideband Code Division Multiple Access (WCDMA) system, may also be an evolved NodeB (eNB) or eNodeB) in an LTE system, may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or may be a relay station, an access point, a vehicle-mounted device, a wearable device, and a network device in a future 5G network or a network device in a future evolved PLMN network, and the like, and the present embodiment is not limited thereto.

In the embodiment of the application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address list, word processing software, instant messaging software and the like. Furthermore, the embodiment of the present application does not particularly limit the specific structure of the execution main body of the method provided by the embodiment of the present application, as long as the communication can be performed according to the method provided by the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, for example, the execution main body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module capable of calling the program and executing the program in the terminal device or the network device.

In addition, various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disk, floppy disk, or magnetic tape), optical disks (e.g., compact Disk (CD), digital Versatile Disk (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), card, stick, or key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

The embodiment of the application can be applied to an LTE system, a subsequent evolution system such as 5G and the like, or other wireless communication systems adopting various wireless access technologies such as systems adopting access technologies of code division multiple access, frequency division multiple access, time division multiple access, orthogonal frequency division multiple access, single carrier frequency division multiple access and the like, and is particularly applicable to scenes needing channel information feedback and/or applying a secondary precoding technology, such as a wireless network applying a Massive MIMO technology, a wireless network applying a distributed antenna technology and the like.

It should be understood that a multiple-input-multiple-output (MIMO) technique refers to using a plurality of transmitting antennas and receiving antennas at a transmitting end device and a receiving end device, respectively, so that signals are transmitted and received through the plurality of antennas of the transmitting end device and the receiving end device, thereby improving communication quality. The multi-antenna multi-transmission multi-receiving system can fully utilize space resources, realize multi-transmission and multi-reception through a plurality of antennas, and improve the system channel capacity by times under the condition of not increasing frequency spectrum resources and antenna transmitting power.

MIMO can be classified into single-user multiple-input multiple-output (SU-MIMO) and multi-user multiple-input multiple-output (MU-MIMO). Massive MIMO is based on the principle of multi-user beam forming, hundreds of antennas are arranged on transmitting end equipment, respective beams are modulated for dozens of target receivers, and dozens of signals are transmitted on the same frequency resource simultaneously through space signal isolation. Therefore, the Massive MIMO technology can fully utilize the spatial freedom degree brought by large-scale antenna configuration, and the frequency spectrum efficiency is improved.

Fig. 1 is a schematic diagram of a communication system used in an embodiment of the present application. As shown in fig. 1, the communication system 100 includes a network device 102, and the network device 102 may include multiple antenna groups. Each antenna group can include one or more antennas, e.g., one antenna group can include

antennas

104 and 106, another antenna group can include

antennas

108 and 110, and an additional group can include

antennas

112 and 114. 2 antennas are shown in fig. 1 for each antenna group, however, more or fewer antennas may be utilized for each group. Network device 102 can additionally include a transmitter chain and a receiver chain, each of which can in turn comprise a plurality of components associated with signal transmission and reception such as processors, modulators, multiplexers, demodulators, demultiplexers, antennas, and so forth, as will be appreciated by one skilled in the art.

Network device 102 may communicate with multiple terminal devices, for example, network device 102 may communicate with terminal device 116 and terminal device 122. However, it is understood that network device 102 may communicate with any number of terminal devices similar to

terminal devices

116 or 122.

End devices

116 and 122 may be, for example, cellular phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device for communicating over wireless communication system 100.

As shown in fig. 1, terminal device 116 is in communication with

antennas

112 and 114, where

antennas

112 and 114 transmit information to terminal device 116 over forward link 118 and receive information from terminal device 116 over reverse link 120. In addition, terminal device 122 is in communication with

antennas

104 and 106, where

antennas

104 and 106 transmit information to terminal device 122 over forward link 124 and receive information from terminal device 122 over reverse link 126.

In a frequency division duplex, FDD system, forward link 118 can utilize a different frequency band than that used by reverse link 120, and forward link 124 can utilize a different frequency band than that used by reverse link 126, for example.

As another example, in a Time Division Duplex (TDD) system and a full duplex (full duplex) system, forward link 118 and reverse link 120 can utilize a common frequency band and forward link 124 and reverse link 126 can utilize a common frequency band.

Each group of antennas and/or area designed for communication is referred to as a sector of network device 102. For example, antenna groups may be designed to communicate to terminal devices in a sector of the areas covered by network device 102. During communication by network device 102 with

terminal devices

116 and 122 over

forward links

118 and 124, respectively, the transmitting antennas of network device 102 may utilize beamforming to improve signal-to-noise ratio of

forward links

118 and 124. Moreover, mobile devices in neighboring cells can experience less interference when network device 102 utilizes beamforming to transmit to

terminal devices

116 and 122 scattered randomly through an associated coverage area, as compared to a manner in which a network device transmits through a single antenna to all its terminal devices.

At a given time, network device 102, terminal device 116, or terminal device 122 may be a wireless communication transmitting apparatus and/or a wireless communication receiving apparatus. When sending data, the wireless communication sending device may encode the data for transmission. Specifically, the wireless communication transmission apparatus may acquire a certain number of data bits to be transmitted to the wireless communication reception apparatus through the channel, for example, the wireless communication transmission apparatus may generate, receive from another communication apparatus, or save in a memory or the like a certain number of data bits to be transmitted to the wireless communication reception apparatus through the channel. Such data bits may be contained in a transport block or transport blocks of data, which may be segmented to produce multiple code blocks.

Furthermore, the communication system 100 may be a public land mobile network PLMN (public land mobile network) network or a device-to-device (D2D) network or a machine-to-machine (M2M) network or other networks, and fig. 1 is a simplified schematic diagram for easy understanding only, and other network devices may be included in the network, which is not shown in fig. 1.

For the sake of understanding, the following description will be given of terms related to the embodiments of the present application.

1. Time cell

The time unit may be a subframe (frame), a slot (slot), or a symbol (symbol). The identifier of the time unit may be specifically an identifier of a subframe, a slot, or a symbol, and taking the identifier of the symbol as an example, in one resource unit (including one or more Resource Blocks (RBs)), the identifier of the symbol may be 0 to 6 (or 1 to 7), or may be 0 to 13 (or 1 to 14).

Generally, the time unit identifiers are cyclic, for example, in each resource unit, the symbol identifiers are 0 to 13, and for a plurality of resource units, the symbol identifiers are 0 to 13, …,0 to 13, and so on. If the identifier of a time unit is a negative value, the time unit is a time unit corresponding to a forward recursion corresponding value from the resource unit corresponding to the current time. For example, according to the above definition, there may be a time unit identified as-2, and if the resource unit corresponding to the current time is the second resource unit of 0-13, …, 0-13, then the time unit identified as-2 represents the time unit identified as 12 in the first resource unit in the forward recursion.

Illustratively, as shown in fig. 2, each of the first resource unit and the second resource unit includes 13 time units, and the 13 time units are respectively identified as 0,1,2, …, and 13.n =13, if the time cell identified as n is the time cell identified as 13 in the first resource unit, then the time cell identified as n +2 is the time cell identified as 1 in the second resource unit.

2. Reference time unit

The reference time unit is also called a Channel Quality Indication (CQI) reference resource (reference resource) for indicating that CQI (or CSI) is calculated based on channel state information on time-frequency resources occupied by the reference resource. The CSI may include at least one of a Rank Indication (RI), a Precoding Matrix Indication (PMI), a channel matrix indication (CQI), and a CQI, and may be configured by the network device. The PMI is used for indicating that the terminal device recommends a precoding matrix used by the network device, and the channel matrix indicates relevant information (for example, the channel matrix itself, a relevant matrix of the channel matrix, or an eigenvector of the relevant matrix of the channel matrix, etc.) for indicating a channel matrix from the network device to the terminal device.

Specifically, the reference time unit (or CQI reference resource) may occupy one or more OFDM symbols of a certain time unit (e.g., a slot) in the time domain, and may occupy multiple frequency domain units corresponding to the one or more OFDM symbols in the frequency domain. The frequency domain unit may be a subcarrier (subcarrier), a Resource Block (RB), a subband (subband), or the like. Therefore, the identifier of the reference time unit is the identifier of the time unit in which the OFDM symbol occupied by the reference time unit is located.

Fig. 3 and 4 show schematic diagrams of two reference time units.

For example, as shown in fig. 3, the network device may send a reference signal (e.g., a channel state information-reference signal (CSI-RS)) to the terminal device over a time unit identified as n-y for the terminal device to perform channel measurement. The network device may configure the terminal device to send CSI on a time cell identified by n, where the CSI is calculated based on channel state information of a time-frequency resource occupied by a reference time cell identified by n-x, n is an integer greater than or equal to 0, and x and y are positive integers. The CSI indicates the CSI at a time prior to the reporting time. When x = y, the time unit in which the reference time unit is located is the time unit in which the reference signal is located.

For another example, as shown in fig. 4, the network device may transmit a reference signal (e.g., CSI-RS) to the terminal device over time units identified as n-y for the terminal device to perform channel measurements. The network device may configure the terminal device to report the CSI on the time unit identified as n, and the reference time unit on which the CSI is configured is identified as n + m, where n is an integer greater than or equal to 0, and m and y are positive integers. That is, the CSI reporting type is a prediction type, since the CSI reflects the CSI of the channel state information at a future time. The terminal device may send CSI for the reference time unit identified as n + m over the time unit identified as n, also referred to herein as reporting channel state information at time n + m. The CSI indicates the channel state information at a future time after the reporting time. The n and m may be predefined or configured for the terminal device by the network device through signaling.

Since m is a positive integer, the time unit identified as n + m is m time units later than the time unit identified as n, and thus m can be referred to as a reference time unit offset (reference time unit offset) or a reporting time unit offset (report time unit offset). Similarly, the time unit identified as n-x is x time units earlier than the time unit identified as n, and x may also be referred to as a reporting time unit offset or a reference time unit offset. For example, when a time unit is a slot, the reporting time unit offset may also be referred to as a reporting slot offset (report slot offset).

In a Frequency Division Duplex (FDD) system or other systems where channel reciprocity is not good, the terminal device needs to measure and report the CSI to the network device. If the CSI reported by the terminal device is the CSI of the reference time unit identified as n-x before the reporting time n, and the time when the network device reports and schedules the downlink data to the terminal device is a certain time unit identified as n + m after the reporting time n, for the terminal device with higher moving speed, the CSI at the time of n + m is not matched with the CSI at the time of n-x, thereby seriously affecting the transmission efficiency of the downlink data. Therefore, the network device may configure the terminal device to report the CSI of the prediction type. Namely reporting the CSI at the n + m moment. However, since the data scheduling is dynamic, it is not necessarily located at time n + m. When the scheduling time does not match the predicted time, the predicted CSI may still not match the actual CSI, affecting the data transmission performance.

In view of this, the embodiment of the present application provides a new method for reporting CSI, which is beneficial to improving the matching degree between the CSI applied by the network device and the current time channel, and further improving the data transmission performance.

Fig. 5 shows a schematic flowchart of a method 500 for reporting CSI according to an embodiment of the present application. The method 500 may be applied to the communication system 100 shown in fig. 1, but the embodiment of the present application is not limited thereto.

S510, the network device sends first indication information, and correspondingly, the terminal device receives the first indication information, wherein the first indication information is used for indicating K reporting time unit offsets n _i ，i＝1,2,…,K，n _i Is a non-zero integer, and K is an integer greater than or equal to 2.

S520, if the network device sends a second indication message, and correspondingly, the terminal device receives the second indication message, where the second indication message is used to indicate K in the K reporting time unit offsets ₁ One reporting time unit offset

q＝1,2,...,K ₁ ，i _q ∈{1,2,...,K}，K ₁ Is a positive integer less than K.

S530, the terminal equipment sends the first channel state information CSI on the time unit marked as n, and correspondingly, the network equipment is marked as nReceiving the first CSI on a time unit of n, the first CSI representing K ₁ CSI of one reference time unit, the K ₁ Identification of the qth one of the reference time units as

n is an integer greater than or equal to 0.

Specifically, the network device may indicate K reporting time unit offsets n by the first indication information ₁ ,n ₂ ,…,n _k And then the second indication information indicates K in K reporting time unit offsets ₁ One reporting time unit offset

As shown in FIG. 6, K ₁ One reporting time unit offset

Is to include in K reporting time unit offsets n ₁ ,n ₂ ,…,n _k The method of (1).

After the terminal device receives the first indication information and the second indication information, K indicated by the second indication information may be sent on a time unit identified as n ₁ CSI for each reference time unit. It should be understood that K is as defined above ₁ The CSI of each reference time unit includes K ₁ The CSI for each of the reference time units, collectively referred to herein as the first CSI. The first CSI comprises K ₁ The CSI of each reference time unit in each reference time unit may be the first CSI formed by compressing the CSI of each reference time unit, or the first CSI formed by not compressing the CSI of each reference time unit, which is not limited in this application. Due to K ₁ The reference time unit is selected from K reference time units, K is an integer greater than or equal to 2, K is a integer greater than or equal to ₁ Is less than K.

Illustratively, when the second indication information is DCI, the second indication information may be carried in the DCI in the uplink format.

The DCI in the uplink format is used to trigger reporting of the CSI and/or sending of a Physical Uplink Shared Channel (PUSCH). Optionally, the DCI of the format may include a CSI request (request) field for triggering reporting of one CSI or multiple CSIs. The DCI of this format may further include indication information for indicating uplink resource allocation, that is, the indication information may be used to allocate PUSCH resources carrying CSI. The CSI request may further indicate K corresponding to the CSI ₁ A reference time unit.

Or, the DCI in the uplink format is not used to trigger reporting of the CSI, but the DCI in the uplink format includes a field for indicating measurement start of one CSI or multiple CSIs, and a field for indicating K corresponding to the CSI ₁ A field of a reference time unit. In this case, the DCI does not include indication information for indicating PUSCH resource allocation.

In a possible implementation manner, the network device may use a bit sequence to indicate K from the K reporting time unit offsets ₁ And if the reporting time unit is deviated, the length of the bit sequence corresponding to the second indication information is K. For example, K =4,K ₁ =2, the length of the bit sequence corresponding to the second indication information is 4, and the bit sequence includes 4 bits and 4 reporting time unit offsets n ₁ ,n ₂ ,n ₃ ,n ₄ One-to-one correspondence, assuming that 1 represents selection and 0 represents non-selection, then if reporting time unit offset n is selected ₁ And n ₃ If the second indication information is 1010, if the reporting time unit n is selected ₁ And n ₄ Then the second indication information is 1001. It should be understood that 0 may also be used to indicate selection,1 is not optional and is not limited herein.

In another possible implementation manner, the network device may use a bit combination manner to indicate K from the K reporting time unit offsets ₁ If the reporting time unit is deviated, the length of the bit sequence corresponding to the second indication information is

For example, K =4,K ₁ =2, then coexist in

In a possible case, the second indication information corresponds to a bit sequence having a length of

At this time, K ₁ =2 may be indicated by the second indication information, or configured by other signaling (e.g., RRC). In one design, the above 6 cases can be as shown in the following table one:

watch 1

Second indication information	K ₁ A reported time unit offset
		000	n ₁ ,n ₂
100	n ₁ ,n ₃
		110	n ₁ ,n ₄
101	n ₂ ,n ₃
		110	n ₂ ,n ₄
010	n ₃ ,n ₄
		011	\
001	\
		111	\

That is, the reporting time unit offset identifier n is selected by 000 ₁ ,n ₂ With 100, the selected reporting time unit offset is denoted as n ₁ ,n ₃ And 110 is adopted to represent that the selected reporting time unit offset is marked as n ₁ ,n ₄ And 101 is adopted to represent that the selected reporting time unit offset is marked as n ₂ ,n ₃ And 110 is adopted to represent that the selected reporting time unit offset is marked as n ₂ ,n ₄ And the reporting time unit offset identifier of the selection is represented as n by 010 ₃ ,n ₄ The remaining 011, 001 and 111 can be temporarily reserved without any physical meaning. The first table may be a protocol agreement, or may be configured for the terminal device by the network device through signaling, which is not limited in this embodiment of the present application.

N is above _i Are all non-zero integers. In one possible implementation, in the above

K of ₁ In each value, there is at least one

The CSI reported by the terminal device includes at least one predicted value (also referred to as predicted CSI) of CSI at a future time, and the network device may schedule the terminal device to perform data transmission at a time corresponding to the predicted value of CSI (or a time near the scheduling time) according to the predicted value of CSI. Because the terminal equipment has the unquantized CSI, the terminal equipment carries out CSI prediction based on the unquantized CSI, so that better prediction performance can be obtained, and the accuracy of the CSI is improved.

In another possible implementation, the above

Are all less than zero, K ₁ The CSI reported by the terminal device is greater than or equal to 2, that is, the first CSI includes at least two CSI measured values at historical times, and the network device can predict the CSI at a future time according to the at least two CSI measured values at historical times, so as to obtain predicted values of the CSI at other times, and schedule the terminal device to perform data transmission at corresponding times. The CSI prediction by the network device can reduce the computational complexity of the terminal device, thereby reducing the power consumption of the terminal device.

In another possible implementation, the above

Are all greater than zero, K ₁ The CSI reported by the terminal device is greater than or equal to 2, that is, the first CSI includes predicted values of CSI at least two future times. At this time, the terminal device predicts the CSI and reports the prediction result to the network device. The at least two future moments may be moments when the network device considers that data scheduling will be performed, and the network device may perform precoding of downlink data directly according to the report of the terminal device without further prediction. Since the terminal device has unquantized CSI, it is based on unquantized CSIThe CSI prediction by the CSI can obtain better prediction performance.

Illustratively, the cell offset n is a fixed reference cell offset that is assumed to be configured by the network device for the terminal device only ₁ Then when the network device schedules data at a time other than n + n ₁ When the first CSI reported by the terminal equipment is the time n + n ₁ The CSI reported by the terminal device may not match the CSI at the scheduling time, and thus the data transmission performance may be damaged. In this embodiment, for example, the network device configures at least two reporting time unit offsets for the terminal device, and it is assumed that the terminal device reports n + n at time n ₁ And n + n ₂ The CSI of two moments, the network device can flexibly determine that the moment for scheduling data is n + n according to the requirement ₁ And/or n + n ₂ Even at other times n + n ₃ . Wherein n + n ₃ CSI of a time instant may be determined by a network device according to n + n ₁ And n + n ₂ And the CSI of the time is calculated. Therefore, the method for configuring at least two reporting time unit offsets in the embodiment of the present application can provide greater flexibility for scheduling data for the network device, and simultaneously enable the CSI reported by the terminal device to be more matched with the downlink dataTrue channel state at scheduling.

In the flowchart shown in fig. 7, the number of reporting time unit offsets configured by the network device for the terminal device is 2, which is n respectively ₁ And n ₂ . The network device may transmit reference signals (e.g., CSI-RS) to the terminal device at least two times, e.g., the network device transmits reference signals to the terminal device at n-y times and n-z times. And the network equipment triggers the terminal equipment to report n + n at n moment ₁ Time and n + n ₂ CSI of time instant, i.e. reference time unit at n + n ₁ Time and n + n ₂ The moment of time. The terminal equipment carries out channel measurement according to the received reference signal to obtain n + n ₁ CSI and n + n at time ₂ CSI of a moment, and reporting a first CSI at the moment n, wherein the first CSI comprises n + n ₁ CSI and n + n at time ₂ CSI of the time instant.

It should be understood that only n + n is used in FIG. 7 ₁ Time and n + n ₂ The example of the time earlier than n is exemplified, that is, n is shown in the embodiment corresponding to fig. 7 ₁ And n ₂ Are all negative integers, so that after obtaining the first CSI, the network device can obtain the first CSI according to n + n ₁ CSI and n + n at time ₂ The CSI at a time obtains the CSI at a future time, for example, the CSI at the time n + n2 is used as the CSI at the future time, or the CSI at the future time is obtained by predicting the CSI according to the CSI at the two times. And for n ₁ And/or n ₂ Under the condition of positive integer, the terminal equipment can predict CSI according to the channel results measured at the n-y time and the n-z time to obtain n + n ₁ Time sum n + n ₂ And the network device obtains the CSI of the data scheduling time according to the CSI of the two times, which is not described herein again.

Since the number K of reporting time unit offsets indicated by the first indication information may be very large, if K is not further selected from the K reporting time unit offsets through the second indication information ₁ If the reporting time unit is shifted, a larger K value means that the terminal device needs to calculate CSI at more times and report the CSI, which has a higher requirement on the computing capability of the terminal device and is easy to introduceThe large CSI calculation time delay aggravates the CSI mismatch problem. In this embodiment, the network device may select a part of the K reporting time unit offsets by using the second indication information, and the terminal device only needs to calculate the CSI of the reference time unit corresponding to the reporting time unit offset indicated by the second indication information, so that the complexity of calculating the CSI and the calculation delay of the terminal device may be reduced.

As an optional embodiment, the first indication information may be carried in CSI configuration information. The CSI configuration information may further include: content of CSI reporting (e.g., rank Indication (RI), precoding Matrix Indication (PMI), channel Quality Indication (CQI), etc.), frequency domain granularity of reporting of PMI and CQI, a codebook used for CSI calculation, a channel state information reference signal (CSI-RS) resource configuration information used for calculating the CSI.

It should be understood that, for the prediction of CSI, the CSI-RS resource may be a periodic CSI-RS resource, a semi-persistent CSI-RS resource, or a CSI-RS resource that is triggered by one DCI signaling and is transmitted multiple times, which is not limited in this embodiment of the present application.

Specifically, after receiving the second indication information, the terminal device may perform multiple measurements on the CSI-RS resource to obtain K ₁ Each of the reference time units (identified as respectively

) And K is calculated from the measured data ₁ And reporting the CSI of each reference time unit to the network equipment. When this K is ₁ When the reference time unit includes at least one reference time unit at a future time, the terminal device may obtain CSI on the reference time unit at the at least one future time through some algorithm (e.g., a prediction algorithm).

As an optional embodiment, the second indication information is used for indicating K ₂ Reporting the K in a time unit offset ₁ A reported time unit offset, theK ₂ Each reporting time unit offset belongs to the K reporting time unit offsets, K ₂ Is a positive integer less than K, and K ₁ Less than K ₂ ；

The method further comprises the following steps:

if the network device sends third indication information, correspondingly, the terminal device receives the third indication information, where the third indication information is used to indicate the K reporting time unit offsets in the K reporting time unit offsets ₂ Reporting time unit offset.

Specifically, the network device may first send the first indication information to indicate K reporting time unit offsets, and then send the third indication information to indicate K of the K reporting time unit offsets ₂ Reporting the time unit offset, and then sending a second indication information indication K ₂ K in one reporting time unit offset ₁ Reporting time unit offset. Namely, the K corresponding to the CSI which is finally required to be reported by the terminal equipment is selected through a three-level indication mode ₁ Reporting time unit offset. Thus, K ₁ <K ₂ <K。

It should be understood that when the reporting of the first CSI is semi-persistent CSI reporting or aperiodic CSI reporting, the network device needs to send signaling to the terminal device to trigger the reporting of the first CSI. The signaling for triggering CSI reporting may be the second indication information, or may also be other information different from the second indication information, which is not limited in this embodiment of the present application.

As an optional embodiment, the second indication information is further used to indicate the terminal device to send the first CSI.

Specifically, the second indication information may trigger reporting of CSI. That is, in this embodiment, the second indication information is used to trigger the terminal device to report the CSI, and select the K corresponding to the reported CSI ₁ Reporting time unit offset. Since the second indication information is used for triggering the reporting of the CSI, the second indication informationThe information may further include indication information of a time-frequency resource carrying the first CSI. In this case, the third indication information does not include indication information of a time-frequency resource carrying the first CSI.

In this embodiment, the second indication information and the third indication information are combined, so that the terminal device may be assisted to start parameter calculation of the first CSI in advance. Specifically, CSI reporting is divided into three reporting modes, namely periodic (periodic) CSI reporting, semi-persistent (semi-persistent) CSI reporting, and aperiodic (aperiodic) CSI reporting. For semi-continuous CSI reporting and aperiodic CSI reporting, if a trigger mechanism is adopted, the terminal equipment needs to wait for receiving second indication information for triggering CSI reporting, then starts parameter calculation of the first CSI according to the measurement results of a plurality of historical moments, and determines the currently reported first CSI. When K is ₁ When the value is large, or the first CSI includes the predicted value of the CSI of the reference time unit at the future time, the calculation of the first CSI or the training of the prediction parameters for the prediction CSI calculation requires a long time. Therefore, the time delay of the first CSI report is large, which results in the deterioration of timeliness of the first CSI report. In this embodiment, the network device may first select K through the third indication information ₂ And reporting the time unit offset, wherein the terminal device may start parameter training of the first CSI or parameter calculation of the first CSI according to the third indication information. When the terminal device receives second indication information which is sent by the network device and used for triggering CSI reporting, the relevant parameters of the first CSI are already calculated, and the first CSI can be calculated quickly, so that the CSI reporting time delay is reduced, and the CSI reporting timeliness is improved.

As an optional embodiment, the method further comprises: and if the network device sends fourth indication information, correspondingly, the terminal device receives the fourth indication information, and the fourth indication information is used for indicating the terminal device to send the first CSI.

Specifically, the network device may instruct the terminal device to perform CSI reporting through the fourth indication information. For example, the network device may first send the first indication information to indicate K reporting time unit offsets, and then send the second indication information to indicate K reporting time unit offsetsReporting K of time unit offsets ₁ And the reporting time unit shifts, and then fourth indication information is sent to trigger the terminal equipment to report the CSI. In this way, after receiving the second indication information, the terminal device may start calculation or training of the first CSI-related parameter according to the measurement results of the multiple historical times, and determine the currently reported first CSI. And when the terminal equipment receives fourth indication information which is sent by the network equipment and used for triggering CSI reporting, the parameters of the first CSI are trained, and the first CSI can be calculated quickly, so that the CSI reporting time delay is reduced, and the CSI reporting timeliness is improved.

As an optional embodiment, the first indication information is used to indicate M reporting time unit offset sets, where reporting time unit offsets included in the M reporting time unit offset sets are the K reporting time unit offsets, where an mth reporting time unit offset set in the M reporting time unit offset sets includes x reporting time unit offsets _m One reporting time unit offset, and at least one x exists _m Is greater than or equal to 2, M is an integer greater than 1, x _m Is a positive integer less than K, M =1,2, …, M.

Specifically, the K reporting time unit offsets indicated by the first indication information are reporting time unit offsets in M reporting time unit offset sets, that is, the K reporting time unit offsets and the M reporting time unit offset sets are equivalent. In this way, the network device may indicate the M reporting time unit offset sets through the first indication information, and the terminal device may determine K reporting time unit offsets according to the M reporting time unit offset sets. In this embodiment, the mth reporting time unit offset set of the M reporting time unit offset sets includes x _m One reporting time unit offset, and at least one x exists _m If M is greater than or equal to 2, M is smaller than K, and therefore, by performing the indication in a collective manner, the subsequent second indication information can be reducedIndication K ₁ Signaling overhead of individual reference time units.

Illustratively, the identifiers of K =5,5 reporting time unit offsets are n respectively ₁ ,n ₂ ,…,n ₅ M =3,3 reporting time unit offset sets are: reporting time unit offset set 1= { n = { n } ₁ ,n ₃ Reporting time unit offset set 2= { n = } ₂ Reporting time unit offset set 3= { n = } ₄ ,n ₅ }。

As an optional embodiment, the second indication information is used to indicate M of the M reporting time unit offset sets ₁ A reporting time unit offset set, M ₁ The reporting time unit offset included in each reporting time unit offset set is K ₁ Individual reported time unit offset, M ₁ Is a positive integer less than M.

In the above example, K =5,5 reporting time unit offsets are n respectively ₁ ,n ₂ ,…,n ₅ ，K ₁ =2, it is assumed that the identifiers of the 2 reporting time unit offsets are n respectively ₁ ,n ₃ Thus, since the reporting time unit offset set 1= { n = ₁ ,n ₃ Reporting time unit offset set 2= { n = } ₂ Reporting time unit offset set 3= { n = } ₄ ,n ₅ The network device only needs to indicate the reporting time unit offset set 1 through the identifier of the reporting time unit offset set, that is, the second indication information indicates the reporting time unit offset set 1, and the terminal device can determine the 1 reporting time unit offset according to the second indication information2 reporting time unit offsets included in the set.

For example, if the network device does not use the method of indicating the reporting time unit offset set, the network device may use a bit sequence to indicate the K ₁ Reporting time unit offset. For the above example, the network device needs a bit sequence of 5 bits, which indicates K = K in 5 reporting time unit offsets respectively ₁ =2 reporting time unit offsets. If the network device adopts a mode of indicating the reporting time unit offset set, the network device needs a bit sequence of 3 bits, and indicates that M = M in 3 sets ₁ =1 set. Therefore, the method for indicating the reporting time unit offset set can reduce the network equipment indication K ₁ Reporting signaling overhead for time unit offset. Especially when the second indication information is DCI, reduction of bit overhead (e.g., from 5 bits to 3 bits) is significant.

As an optional embodiment, the third indication information is used to indicate M reporting time unit offset sets in the M reporting time unit offset sets ₂ A reporting time unit offset set, the second indication information being used for indicating M ₂ Reporting the M in a time unit offset set ₁ A reporting time unit offset set, M ₂ The reporting time unit offset included in each reporting time unit offset set is K ₂ Individual reported time unit offset, M ₂ Is a positive integer less than M, and M ₁ Less than M ₂ 。

In the same way, in the case of indicating through the third-level signaling, in order to save signaling overhead, the network device may also only indicate the reporting time unit offset set, and the specific situation is similar to the above, and is not described here again.

As an optional embodiment, a jth reporting time unit offset n of the K reporting time unit offsets _j ＝n ₁ P is a positive integer, and j is an integer of {1,2, …, K }.

Specifically, the K reporting time unit offsets are equally spaced, and the interval is P, so that the network device may only set the terminal with the offsetReporting time unit offset n with minimum standby configuration identifier ₁ And an interval P, the terminal equipment can calculate other reporting time unit offsets in the K reporting time unit offsets according to the formula. For example, K =4,K reporting time unit offsets are 2,4,6,8, and the K reporting time unit offsets are equally spaced, and the interval P =2, then the network device may only configure the identifier 2 and the interval P =2 of the first reporting time unit offset, and the terminal device may calculate the identifiers of the remaining 3 reporting time unit offsets as 4,6,8 by combining the above formulas.

Therefore, the embodiment of the application configures the K reporting time unit offsets to be equally spaced, which is beneficial to saving signaling overhead for configuring the K reporting time unit offsets by the network device. And measuring the CSI of the reference time unit at equal intervals is beneficial to the terminal equipment and/or the network equipment to predict the CSI, and the prediction accuracy is improved.

As an optional embodiment, the method further comprises: if the terminal device reports the capability information, correspondingly, the network device receives the capability information, and the capability information is used for indicating the maximum value of K supported by the terminal device and/or K ₁ Is measured.

Specifically, the terminal device may report capability information to the network device, which indicates a maximum value of K and/or K that the terminal device can support ₁ Is measured. The network equipment can determine K and K according to the capability information reported by the terminal equipment ₁ The value of (a). Therefore, the number of the reporting time unit offsets configured for the terminal equipment by the network equipment can be matched with the actual situation of the terminal equipment, and the situation that the terminal equipment cannot report more CSI due to more reporting time unit offsets configured for the network equipment is avoided.

Fig. 8 shows a schematic flowchart of a method 800 for reporting CSI according to an embodiment of the present application. The method 800 may be applied to the communication system 100 shown in fig. 1, but the embodiment of the present application is not limited thereto.

In S810, the terminal device sends capability information to the network device, and correspondingly, the network device receives the capability information, which is the capability informationThe information is used for indicating the maximum value of K supported by the terminal equipment and/or K ₁ Is measured.

In S820, the network device determines K and/or K according to the capability information ₁ 。

For example, the terminal device may report first capability information and second capability information to the network device, where the first capability information is used to indicate a maximum value of K, and the second capability information is used to indicate K ₁ Is measured. Thus, the network device may determine K based on the first capability information and K based on the second capability information ₁ . It should be understood that, in the embodiment of the present application, the sending order of the first capability information and the second capability information is not limited, and K are ₁ The order of determination is not limited.

In S830, the network device sends first indication information, and correspondingly, the terminal device receives the first indication information, where the first indication information is used to indicate K reporting time unit offsets n _i ，i＝1,2,…,K，n _i Is a non-zero integer, and K is an integer greater than or equal to 2.

In S840, the network device sends second indication information, and correspondingly, the terminal device receives the second indication information, where the second indication information is used to indicate K of the K reporting time unit offsets ₁ One reporting time unit offset

In S850, the network device sends the CSI-RS to the terminal device, and correspondingly, the terminal device receives the CSI-RS. Optionally, the network device is at least K ₁ The CSI-RS is transmitted over a time unit. The K is ₁ The time unit can be located at K ₁ A time slot, or at K ₁ Groups OFDM symbols. The K is ₁ The group OFDM symbols may be located at K ₁ X slots, X being an integer greater than 1.

In S860, the terminal device performs channel measurement according to the received CSI-RS, and determines the first CSI. The first CSI may include CSI at a historical time obtained by actual measurement by the terminal device, or may also include CSI at a future time obtained by prediction by the terminal device according to the CSI at the historical time, which is not limited in this embodiment of the present application.

In S870, the terminal device sends the first CSI to the network device, and correspondingly, the network device receives the first CSI.

In S880, the network device determines, according to the first CSI, a time unit for which data transmission needs to be scheduled, and then schedules data transmission.

It should be understood that the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The method for reporting channel state information according to the embodiment of the present application is described in detail above with reference to fig. 1 to 8, and the apparatus for reporting channel state information according to the embodiment of the present application is described in detail below with reference to fig. 9 to 10.

Fig. 9 illustrates an apparatus 900 for reporting channel state information according to an embodiment of the present application. The apparatus 900 may be a terminal device, or may be a chip in the terminal device. The apparatus 900 may be a network device, or may be a chip in a network device. The apparatus 900 includes: a receiving unit 910 and a transmitting unit 920.

In one possible implementation manner, the apparatus 900 is configured to execute the respective flows and steps corresponding to the terminal device in the method 200.

The receiving unit 910 is configured to: receiving first indication information, wherein the first indication information is used for indicating K reporting time unit offsets n _i ，i＝1,2,…,K，n _i Is a non-zero integer, K is an integer greater than or equal to 2; and receiving second indication information, where the second indication information is used to indicate K of the K reporting time unit offsets ₁ One reporting time unit offset

q＝1,2,...,K ₁ ，i _q ∈{1,2,...,K}，K ₁ Is a positive integer less than K;

the sending unit 920 is configured to: transmitting first channel State information, CSI, on a time unit identified as n, the first CSI representing K ₁ CSI of one reference time unit, the K ₁ Identification of the qth one of the reference time units as

n is an integer greater than or equal to 0.

According to the embodiment of the application, the first indication information indicates at least two reporting time unit offsets, and the reporting time unit offsets corresponding to the CSI reported by the terminal equipment are further selected through the second indication information, so that the network equipment can flexibly select the reference time unit according to needs, flexibly determine the time unit for scheduling data according to the CSI reported by the terminal equipment, and the matching degree of the CSI applied by the network equipment and the current channel is favorably improved, and the data transmission performance is improved.

Optionally, the second indication information is used for indicating K ₂ Reporting the K in a time unit offset ₁ A reported time unit offset, said K ₂ Each reporting time unit offset belongs to the K reporting time unit offsets, K ₂ Is a positive integer less than K, and K ₁ Less than K ₂ (ii) a The receiving unit 910 is further configured to: receiving third indication information, where the third indication information is used to indicate the K reporting time unit offsets of the K reporting time unit offsets ₂ Reporting time unit offset.

Optionally, the second indication information is further used to indicate the apparatus to send the first CSI.

Optionally, the receiving unit 910 is further configured to: receiving fourth indication information, wherein the fourth indication information is used for indicating the device to send the first CSI.

Optionally, the first indication information is used to indicate M reporting time unit offset sets, where reporting time unit offsets included in the M reporting time unit offset sets are the reporting time unit offsetsK reporting time unit offsets, wherein an mth reporting time unit offset set of the M reporting time unit offset sets comprises x _m One reporting time unit offset, and at least one x exists _m Is greater than or equal to 2, M is an integer greater than 1, x _m Is a positive integer less than K, M =1,2, …, M.

Optionally, the second indication information is used to indicate M of the M reporting time unit offset sets ₁ A reporting time unit offset set, M ₁ The reporting time unit offset included in each reporting time unit offset set is K ₁ Individual reported time unit offset, M ₁ Is a positive integer less than M.

Optionally, a jth reporting time unit offset n of the K reporting time unit offsets _j ＝n ₁ P is a positive integer, and j is an integer of {1,2, …, K }.

Optionally, the sending unit 920 is further configured to: reporting capability information, wherein the capability information is used for indicating the maximum value of K and/or K supported by the device ₁ Is measured.

In one possible implementation manner, the apparatus 900 is configured to execute the respective procedures and steps corresponding to the network device in the method 200.

The sending unit 920 is configured to: sending first indication information, wherein the first indication information is used for indicating K reporting time unit offsets n _i ，i＝1,2,…,K，n _i Is a non-zero integer, K is an integer greater than or equal to 2; and sending second indication information, wherein the second indication information is used for indicating K in the K reporting time unit offsets ₁ One reporting time unit offset

the receiving unit 910 is configured to: receiving a first channel State information, CSI, on a time unit identified as n, the first CSI representing K ₁ CSI of one reference time unit, the K ₁ Identification of the qth one of the reference time units as

n is an integer greater than or equal to 0.

According to the embodiment of the application, the first indication information indicates the at least two reporting time unit offsets, and the reporting time unit offsets corresponding to the CSI reported by the terminal equipment are further selected through the second indication information, so that the network equipment can flexibly select the reference time unit as required, flexibly determine the time unit for scheduling data according to the CSI reported by the terminal equipment, and the matching degree of the CSI applied by the network equipment and the current time channel is favorably improved, and the data transmission performance is improved.

Optionally, the second indication information is used for indicating K ₂ The K in one reporting time unit offset ₁ A reported time unit offset, said K ₂ The one reporting time unit offset belongs to the K reporting time unit offsets, K ₂ Is a positive integer less than K, and K ₁ Less than K ₂ ；

The sending unit 920 is further configured to: sending third indication information, where the third indication information is used to indicate the K reporting time unit offsets of the K reporting time unit offsets ₂ Reporting time unit offset.

Optionally, the second indication information is further used to instruct the terminal device to send the first CSI.

Optionally, the sending unit 920 is further configured to: and sending fourth indication information, wherein the fourth indication information is used for indicating terminal equipment to send the first CSI.

Optionally, the first indication information is used to indicate M reporting time unit offset sets, where reporting time unit offsets included in the M reporting time unit offset sets are the K reporting time unit offsets, and an mth reporting time unit offset set in the M reporting time unit offset sets includes x reporting time unit offsets _m One reporting time unit offset, and at least one x _m Is greater than or equal to 2, M is an integer greater than 1,x _m is a positive integer less than K, M =1,2, …, M.

Optionally, a jth time unit offset n of the K time unit offsets _j ＝n ₁ P is a positive integer, and j is an integer of {1,2, …, K }.

Optionally, the receiving unit 910 is further configured to: receiving capability information, wherein the capability information is used for indicating the maximum value of K supported by the terminal equipment and/or K ₁ Is measured.

It should be appreciated that the apparatus 900 herein is embodied in the form of functional units. The term "unit" herein may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an optional example, it may be understood by those skilled in the art that the apparatus 900 may be specifically a terminal device or a network device in the foregoing embodiment, and the apparatus 900 may be configured to execute each procedure and/or step corresponding to the terminal device or the network device in the foregoing method embodiment, and is not described herein again to avoid repetition.

The apparatus 900 of each of the above schemes has a function of implementing corresponding steps executed by the terminal device or the network device in the above method; the functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software comprises one or more modules corresponding to the functions; for example, the transmitting unit may be replaced by a transmitter, the receiving unit may be replaced by a receiver, other units, such as the determining unit, may be replaced by a processor, and the transceiving operation and the related processing operation in the respective method embodiments are respectively performed.

In an embodiment of the present application, the apparatus 900 in fig. 9 may also be a chip or a chip system, for example: system on chip (SoC). Correspondingly, the receiving unit and the sending unit may be a transceiver circuit of the chip, and are not limited herein.

Fig. 10 illustrates another apparatus 1000 for reporting channel state information according to an embodiment of the present application. The apparatus 1000 includes a processor 1010, a transceiver 1020, and a memory 1030. Wherein the processor 1010, the transceiver 1020 and the memory 1030 are in communication with each other via an internal connection path, the memory 1030 is configured to store instructions, and the processor 1010 is configured to execute the instructions stored in the memory 1030 to control the transceiver 1020 to transmit and/or receive signals.

In one possible implementation manner, the apparatus 1000 is configured to execute the respective flows and steps corresponding to the terminal device in the method 200.

Wherein the transceiver 1020 is configured to: receiving first indication information, wherein the first indication information is used for indicating K reporting time unit offsets n _i ，i＝1,2,…,K，n _i Is a non-zero integer, K is an integer greater than or equal to 2; receiving second indication information, where the second indication information is used to indicate K of the K reporting time unit offsets ₁ One reporting time unit offset

q＝1,2,...,K ₁ ，i _q ∈{1,2,...,K}，K ₁ Is a positive integer less than K; and transmitting a first CSI on a time unit identified as n, the first CSI representing K ₁ CSI of one reference time unit, the K ₁ Identification of the qth one of the reference time units as

n is an integer greater than or equal to 0.

In one possible implementation manner, the apparatus 1000 is configured to execute the respective procedures and steps corresponding to the network device in the method 200.

Wherein the transceiver 1020 is configured to: sending first indication information, wherein the first indication information is used for indicating K reporting time unit offsets n _i ，i＝1,2,…,K，n _i Is a non-zero integer, K is an integer greater than or equal to 2; sending second indication information, where the second indication information is used to indicate K of the K reporting time unit offsets ₁ One reporting time unit offset

q∈{1,2,...,K ₁ }，i _q ∈{1,2,...,K}，K ₁ Is a positive integer less than K; and receiving a first channel state information, CSI, over a time unit identified as n, the first CSI representing K ₁ CSI of one reference time unit, the K ₁ Identification of the qth one of the reference time units as

n is an integer greater than or equal to 0.

It should be understood that the apparatus 1000 may be embodied as a terminal device or a network device in the foregoing embodiments, and may be configured to perform each step and/or flow corresponding to the terminal device or the network device in the foregoing method embodiments. Alternatively, the memory 1030 may include a read-only memory and a random access memory, and provides instructions and data to the processor. The portion of memory may also include non-volatile random access memory. For example, the memory may also store device type information. The processor 1010 may be configured to execute instructions stored in the memory, and when the processor 1010 executes the instructions stored in the memory, the processor 1010 is configured to perform the steps and/or processes of the method embodiments corresponding to the terminal device or the network device.

It should be understood that in the embodiment of the present application, the processor of the above apparatus may be a Central Processing Unit (CPU), and the processor may also be other general processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software elements in a processor. The software elements may be located in ram, flash, rom, prom, or eprom, registers, among other storage media that are well known in the art. The storage medium is located in a memory, and a processor executes instructions in the memory, in combination with hardware thereof, to perform the steps of the above-described method. To avoid repetition, it is not described in detail here.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a alone, both A and B, and B alone, where A, B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c or a-b-c, wherein a, b and c can be single or multiple.

Those of ordinary skill in the art will appreciate that the various method steps and elements described in connection with the embodiments disclosed herein can be implemented as electronic hardware, computer software, or combinations of both, and that the steps and elements of the various embodiments have been described above generally in terms of their functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially or partially contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for reporting channel state information, comprising:

the terminal equipment receives first indication information, wherein the first indication information is used for indicating K reporting time unit offsets n _i ，i＝1,2,…,K，n _i Is a non-zero integer, K is an integer greater than or equal to 2;

the terminal equipment receives second indication information, wherein the second indication information is used for indicating K in the K reporting time unit offsets ₁ One reporting time unit offset

K ₁ Is a positive integer less than K;

the terminal equipment sends first Channel State Information (CSI) on a time unit marked as n, wherein the first CSI represents K ₁ CSI of a reference time unit, said K ₁ The identity of the qth reference time unit of the reference time units is

n is an integer greater than or equal to 0.

2. The method of claim 1, wherein the second indication information indicates K ₂ Reporting the K in a time unit offset ₁ A reported time unit offset, K ₂ The one reporting time unit offset belongs to the K reporting time unit offsets, K ₂ Is a positive integer less than K, and K ₁ Less than K ₂ ；

The method further comprises the following steps:

the terminal device receives third indication information, where the third indication information is used to indicate the K reporting time unit offsets of the K reporting time unit offsets ₂ Reporting time unit offset.

3. The method of claim 1 or 2, wherein the second indication information is further used for indicating the terminal device to transmit the first CSI.

4. The method of claim 1 or 2, wherein the method further comprises:

and the terminal equipment receives fourth indication information, wherein the fourth indication information is used for indicating the terminal equipment to send the first CSI.

5. The method of claim 1 or 2, wherein the first indication information indicates M time unit offset sets, the M time unit offset sets comprising the K time unit offsets, and wherein an mth time unit offset set of the M time unit offset sets comprises x time unit offset _m One reporting time unit offset, and at least one x exists _m Is greater than or equal to 2, M is an integer greater than 1, x _m Is a positive integer less than K, M =1,2, …, M.

6. The method of claim 5, wherein the second indication information is used for indicating M of the M reporting time unit offset sets ₁ A reporting time unit offset set, M ₁ The reporting time unit offset included in each reporting time unit offset set is K ₁ Individual reported time unit offset, M ₁ Is a positive integer less than M.

7. The method of claim 1 or 2, wherein a jth one of the K time unit offsets n _j ＝n ₁ P is a positive integer, and j is an integer of {1,2, …, K }.

8. The method of claim 1 or 2, wherein the method further comprises:

the terminal equipment reports capability information, and the capability information is used for indicating the maximum value of K supported by the terminal equipment and/or K ₁ Is measured.

9. A method for reporting channel state information, comprising:

the network equipment sends first indication information, wherein the first indication information is used for indicating K reporting time unit offsets n _i ，i＝1,2,…,K，n _i Is a non-zero integer, K is an integer greater than or equal to 2;

the network device sends second indication information, where the second indication information is used to indicate K in the K reporting time unit offsets ₁ One reporting time unit offset

K ₁ Is a positive integer less than K;

the network device receives the first message on a time unit identified as nA Channel State Information (CSI), the first CSI representing K ₁ CSI of a reference time unit, said K ₁ Identification of the qth one of the reference time units as

n is an integer greater than or equal to 0.

10. The method of claim 9, wherein the second indication information indicates K ₂ Reporting the K in a time unit offset ₁ A reported time unit offset, said K ₂ The one reporting time unit offset belongs to the K reporting time unit offsets, K ₂ Is a positive integer less than K, and K ₁ Less than K ₂ ；

The method further comprises the following steps:

the network device sends third indication information, where the third indication information is used to indicate the K reporting time unit offsets of the K reporting time unit offsets ₂ Reporting time unit offset.

11. The method of claim 9 or 10, wherein the second indication information is further used for instructing a terminal device to transmit the first CSI.

12. The method of claim 9 or 10, wherein the method further comprises:

and the network equipment sends fourth indication information, wherein the fourth indication information is used for indicating terminal equipment to send the first CSI.

13. The method of claim 9 or 10, wherein the first indication information indicates M time unit offset sets, the M time unit offset sets comprising the K time unit offsets, and wherein an mth time unit offset set of the M time unit offset sets comprises x time unit offsets _m When reportingOffset between cells, and at least one x _m Is greater than or equal to 2, M is an integer greater than 1, x _m Is a positive integer less than K, M =1,2, …, M.

14. The method of claim 13, wherein the second indication information is used for indicating M of the M reporting time unit offset sets ₁ A reporting time unit offset set, M ₁ The reporting time unit offset included in each reporting time unit offset set is K ₁ Individual reported time unit offset, M ₁ Is a positive integer less than M.

15. The method of claim 9 or 10, wherein a jth one of the K time unit offsets n _j ＝n ₁ P is a positive integer, and j is an integer of {1,2, …, K }.

16. The method of claim 9 or 10, wherein the method further comprises:

the network equipment receives capability information, and the capability information is used for indicating the maximum value of K supported by the terminal equipment and/or K ₁ Is measured.

17. An apparatus for reporting channel state information, comprising:

a receiving unit, configured to receive first indication information, where the first indication information is used to indicate K reporting time unit offsets n _i ，i＝1,2,…,K，n _i Is a non-zero integer, K is an integer greater than or equal to 2; and receiving second indication information, wherein the second indication information is used for indicating K of the K reporting time unit offsets ₁ A reported time unit offset

K ₁ Is a positive integer less than K;

a transmitting unit for transmitting at a time identified as nSending a first CSI on a cell, the first CSI representing K ₁ CSI of one reference time unit, the K ₁ Identification of the qth one of the reference time units as

n is an integer greater than or equal to 0.

18. The apparatus of claim 17, wherein the second indication information indicates K ₂ Reporting the K in a time unit offset ₁ A reported time unit offset, K ₂ Each reporting time unit offset belongs to the K reporting time unit offsets, K ₂ Is a positive integer less than K, and K ₁ Less than K ₂ ；

The receiving unit is further configured to:

receiving third indication information, where the third indication information is used to indicate the K reporting time unit offsets of the K reporting time unit offsets ₂ Reporting time unit offset.

19. The apparatus of claim 17 or 18, wherein the second indication information is further for indicating the apparatus to send the first CSI.

20. The apparatus as claimed in claim 17 or 18, wherein said receiving unit is further configured to:

receiving fourth indication information, wherein the fourth indication information is used for indicating the device to send the first CSI.

21. The apparatus of claim 17 or 18, wherein the first indication information indicates M sets of tti offsets, the tti offsets included in the M sets of tti offsets being the K ts offsets, wherein an mth of the set of ttis offsets includes x _m When reportingOffset by at least one x _m Is greater than or equal to 2, M is an integer greater than 1, x _m Is a positive integer less than K, M =1,2, …, M.

22. The apparatus of claim 21, wherein the second indication information is for indicating M of the M reporting time unit offset sets ₁ A reporting time unit offset set, M ₁ The reporting time unit offset included in each reporting time unit offset set is K ₁ Individual reported time unit offset, M ₁ Is a positive integer less than M.

23. The apparatus of claim 17 or 18, wherein a jth one of the K time unit offsets n _j ＝n ₁ P is a positive integer, and j is an integer of {1,2, …, K }.

24. The apparatus as claimed in claim 17 or 18, wherein said transmitting unit is further configured to:

reporting capability information, wherein the capability information is used for indicating the maximum value of K and/or K supported by the device ₁ Is measured.

25. An apparatus for reporting channel state information, comprising:

a sending unit, configured to send first indication information, where the first indication information is used to indicate K reporting time unit offsets n _i ，i＝1,2,…,K，n _i Is a non-zero integer, K is an integer greater than or equal to 2; and sending second indication information, wherein the second indication information is used for indicating K in the K reporting time unit offsets ₁ One reporting time unit offset

K ₁ Is a positive integer less than K;

a receiving unit for receiving the time unit marked as nReceiving first Channel State Information (CSI), wherein the first CSI represents K ₁ CSI of one reference time unit, the K ₁ Identification of the qth one of the reference time units as

n is an integer greater than or equal to 0.

26. The apparatus of claim 25, wherein the second indication information indicates K ₂ Reporting the K in a time unit offset ₁ A reported time unit offset, said K ₂ The one reporting time unit offset belongs to the K reporting time unit offsets, K ₂ Is a positive integer less than K, and K ₁ Less than K ₂ ；

The sending unit is further configured to:

sending third indication information, where the third indication information is used to indicate the K reporting time unit offsets of the K reporting time unit offsets ₂ Reporting time unit offset.

27. The apparatus of claim 25 or 26, wherein the second indication information is further for indicating a terminal device to send the first CSI.

28. The apparatus of claim 25 or 26, wherein the sending unit is further configured to:

and sending fourth indication information, wherein the fourth indication information is used for indicating terminal equipment to send the first CSI.

29. The apparatus of claim 25 or 26, wherein the first indication information indicates M sets of tti offsets, the tti offsets included in the M sets of tti offsets being the K ttis offsets, wherein an mth of the set of ttis sets includes x _m A reporting time unitOffset and at least one x _m Is greater than or equal to 2, M is an integer greater than 1, x _m Is a positive integer less than K, M =1,2, …, M.

30. The apparatus of claim 29, wherein the second indication information indicates M of the set of M reporting time unit offsets ₁ A reporting time unit offset set, M ₁ The reporting time unit offset included in each reporting time unit offset set is K ₁ Individual reported time unit offset, M ₁ Is a positive integer less than M.

31. The apparatus of claim 25 or 26, wherein a jth one of the K reporting time unit offsets, n _j ＝n ₁ P is a positive integer, and j is an integer of {1,2, …, K }.

32. The apparatus of claim 25 or 26, wherein the receiving unit is further configured to:

receiving capability information, wherein the capability information is used for indicating the maximum value of K supported by the terminal equipment and/or K ₁ Is measured.

33. A chip, comprising: a processor for retrieving from a memory and executing instructions stored in the memory, so that a communication device in which the chip is installed performs the method of any one of claims 1 to 16.

34. A computer-readable storage medium, storing a computer program, which, when executed by a computer, causes the computer to carry out the method according to any one of claims 1 to 16.

35. A system for reporting channel state information, comprising the apparatus of any one of claims 17 to 24 and the apparatus of any one of claims 25 to 32.