WO2022048400A1

WO2022048400A1 - Channel feedback method and apparatus

Info

Publication number: WO2022048400A1
Application number: PCT/CN2021/111280
Authority: WO
Inventors: 葛士斌; 金黄平
Original assignee: 华为技术有限公司
Priority date: 2020-09-07
Filing date: 2021-08-06
Publication date: 2022-03-10
Also published as: CN114157328A

Abstract

Embodiments of the present application provide a channel feedback method and apparatus, being used for solving the problem in the prior art that channel feedback overhead is high. The method comprises: a first terminal device receives indication information from a network device, and feeds back a channel state to the network device on the basis of the indication information, the indication information being used for indicating to report at least one of the following information: a bit required to be reported in the quantization information of a superposition coefficient of the first terminal device, and the number of bits required to be reported in the quantization information of the superposition coefficient of the first terminal device, wherein the superposition coefficient of the first terminal device is used for representing the channel state of the first terminal device together with corresponding base information. In the embodiments of the present application, the network device may indicate the terminal device to report some of the bits in the quantization information of the superposition coefficient; and compared with reporting all the bits of the quantization information of the superposition coefficient, the present application can reduce the repeated reporting of the same information, thereby reducing channel state information feedback overhead.

Description

A kind of channel feedback method and device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number 202010930522.7 and the application title "A Channel Feedback Method and Device" filed with the China Patent Office on September 7, 2020, the entire contents of which are incorporated into this application by reference .

technical field

The present application relates to the field of communication technologies, and in particular, to a channel feedback method and device.

Background technique

The 5G communication system has higher requirements on system capacity and spectral efficiency. In 5G communication systems, massive multiple input multiple output (MIMO) plays a crucial role in the spectral efficiency of the system. When the MIMO technology is adopted, when the base station transmits data to a user equipment (UE), modulation coding and signal precoding need to be performed. How to send data to users depends on channel state information (CSI). The current CSI acquisition solutions are all implemented for a single user. When the number of users is relatively large, the feedback overhead is relatively large.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a channel feedback method and device, a chip, a computer-readable storage medium, a computer program product, and the like, which are used to solve the problem of relatively large channel feedback overhead in the prior art.

In a first aspect, a channel feedback method provided by an embodiment of the present application may be applied to a first apparatus, where the first apparatus may be a terminal device, or a chip or a chipset/chip system in the terminal device. The method includes: the first device receives indication information from a third device, the indication information is used to indicate a reporting method, and the reporting method is to report according to at least one item of the following information: the quantization information of the superposition coefficient of the first device needs to be reported Bits, the number of bits to be reported in the quantization information of the superposition coefficient of the first device, where the superposition coefficient of the first device is used to represent the channel state of the first device together with the corresponding base information. The first device performs channel state feedback to the third device based on the indication information.

In this embodiment of the present application, based on the correlation of channel characteristics between terminal devices, the network device may instruct the terminal devices with channel similarity to report some bits in the quantization information of the superposition coefficients, compared to all the bits in the quantization information of the superposition coefficients reported. bit, the repeated reporting of the same information can be reduced, thereby reducing the CSI feedback overhead.

In one possible design, the first means corresponds to at least one superposition coefficient. The indication information is also used to indicate a superposition coefficient to be reported in the at least one superposition coefficient in a reporting manner. In the above manner, the channel feedback efficiency can be improved.

In a possible design, when the first device performs channel state feedback to the third device based on the indication information, it may send channel state feedback information to the third device, where the channel state feedback information includes at least one of the following information: the first superposition The quantization information of the coefficient, the base information corresponding to the first superposition coefficient, and the information indicated by the reporting method in the quantization information of the second superposition coefficient, the second superposition coefficient is the superposition coefficient indicated by the indication information, and the first superposition coefficient is at least one superposition coefficient. Divide the superposition coefficient indicated by the indication information. In the above manner, for the superposition coefficient reported in the above reporting manner, the terminal device may not report the base information corresponding to the superposition coefficient when performing channel feedback, thereby further reducing feedback overhead.

In a possible design, the bits to be reported in the superposition coefficient of the first device may be: bits in the quantization information of the superposition coefficient of the first device that have different values than the quantization information of the superposition coefficient of the second device bit, the superposition coefficient of the first device corresponds to the same basis information as the superposition coefficient of the second device. In the above design, by reporting different bits, the terminal device can save signaling overhead compared to reporting all bits.

In a possible design, the quantization information of the superposition coefficient of the first device may include at least one item of the following information: at least one bit for indicating the phase, and at least one bit for indicating the amplitude.

In a possible design, the quantization information of the superposition coefficient of the second device may include at least one item of the following information: at least one bit for indicating the phase, and at least one bit for indicating the amplitude.

In the second aspect, a communication method provided by an embodiment of the present application may be applied to a third apparatus, and the third apparatus may be a network device, or a chip or a chipset/chip system in the network device. The method includes: a third device generates indication information, the indication information is used to indicate a reporting method, and the reporting method is to report according to at least one of the following information: bits to be reported in the quantization information of the superposition coefficient of the first device, the first The number of bits to be reported in the quantization information of the superposition coefficient of the device, where the superposition coefficient of the first device is used to represent the channel state of the first device together with the corresponding base information. The third device sends the indication information to the first device.

In one possible design, the first means corresponds to at least one superposition coefficient. The indication information is also used to indicate a superposition coefficient to be reported in the at least one superposition coefficient in a reporting manner. In the above manner, the flexibility of channel feedback can be improved.

In a possible design, after the third device sends the indication information to the first device, the third device may receive channel state feedback information from the first device, where the channel state feedback information includes at least one of the following information: the first The quantization information of the superposition coefficient, the base information corresponding to the first superposition coefficient, and the information indicated by the reporting method in the quantization information of the second superposition coefficient, the second superposition coefficient is the superposition coefficient indicated by the indication information, and the first superposition coefficient is at least one superposition coefficient Divide the superposition coefficient indicated by the indication information. In the above manner, for the superposition coefficient reported in the above reporting manner, the terminal device may not report the base information corresponding to the superposition coefficient when performing channel feedback, thereby further reducing feedback overhead.

In a possible design, before the third device generates the indication information, the third device may determine that the substrate information used by the first device is the same as at least one of the substrate information used by the second device. In the above manner, the network device can restore the complete channel state information of the first terminal device according to the channel feedback information reported by the second terminal device and the channel feedback information reported by the first terminal device.

In a possible design, when the third device generates the indication information, at least one item of the following bit information may be determined: the value of the quantization information of the superposition coefficient of the first device is compared with the value of the quantization information of the superposition coefficient of the second device In different bits, the quantization information of the superposition coefficient of the first device has the same value as that of the quantization information of the superposition coefficient of the second device, and the superposition coefficient of the first device and the second device The compared superposition coefficients correspond to the same base information; the third device generates indication information according to the determined bit information. In the above design, by instructing the first terminal device to report different bits, the network device can restore the complete information of the first terminal device according to the same bits reported by the second terminal device.

In a possible design, when the third device determines that the base information used by the first device is the same as at least one of the base information used by the second device, it may be based on the uplink channel characteristics of the first device and the uplink channel characteristics of the second device. Channel characteristics, determine that the base information used by the first device is the same as at least one of the base information used by the second device. In the above design, according to the reciprocity of the channel, the network device can determine the correlation of the downlink channel according to the characteristics of the uplink channel.

In a possible design, when the third device determines that the base information used by the first device is the same as at least one of the base information used by the second device, it may be based on the channel measurement result historically reported by the first device and the second device Based on the historically reported channel measurement results, it is determined that the base information used by the first device is the same as at least one of the base information used by the second device. In the above design, the network device may determine the correlation of the downlink channel according to the characteristics of the uplink channel.

In a third aspect, a channel feedback method provided by an embodiment of the present application can be applied to a first device, where the first device is a terminal device, or a chip or a chipset/chip system in the terminal device. The method includes: the first device receives second channel state information from the second device, the second channel state information includes at least one superposition coefficient of the second device, wherein any superposition coefficient in the second channel state information is used to combine with The corresponding base information collectively represents the channel state of the second device; the first device performs channel state feedback to the third device based on the second channel state information and the first channel state information, and the first channel state information includes at least one superposition of the first device. coefficient, any superposition coefficient in the first channel state information is used to jointly characterize and determine the channel state of the first device together with the corresponding base information.

In this embodiment of the present application, based on the correlation of channel characteristics between terminal devices, the first terminal device can select the content to be reported according to its own channel state information and the channel state information of the second terminal device, compared with the quantization information of the reported superposition coefficient. All bits of , can reduce repeated reporting of the same information, thereby reducing CSI feedback overhead.

In a possible design, when the first device performs channel state feedback to the third device based on the second channel state information and the first channel state information, the first device may send the quantization of the superposition coefficient included in the first channel state information to the third device All bits of the information, all bits of the quantization information of the first superposition coefficient in the second channel state information, and some bits of the quantization information of the second superposition coefficient in the second channel state information.

In the above manner, after the second terminal device sends the second channel state information to the first terminal device, the first terminal device may report the channel state information of the two terminal devices, and only some bits are reported for some superposition coefficients when reporting. , so that the CSI feedback overhead can be reduced.

In a possible design, the first superposition coefficient is different from the base information corresponding to any superposition coefficient in the first channel state information. The second superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the first channel state information. Part of the bits are bits in the quantization information of the second superposition coefficient that have different values than the quantization information of the superposition coefficient in the first channel state information, and the second superposition coefficient corresponds to the superposition coefficient compared in the first channel state information. The same base information. In the above design, by reporting the special bit of the superposition coefficient with channel similarity of the first device, the third device can restore the channel similarity of the first device according to the common bit of the superposition coefficient with channel similarity of the second device. The full bits of the superposition coefficients.

In a possible design, when the first device performs channel state feedback to the third device based on the second channel state information and the first channel state information, the first device may send the quantization of the superposition coefficient included in the second channel state information to the third device All bits of the information, all bits of the quantization information of the third superposition coefficient in the first channel state information, and some bits of the quantization information of the fourth superposition coefficient in the first channel state information.

In a possible design, the third superposition coefficient is different from the base information corresponding to any superposition coefficient in the second channel state information. The fourth superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the second channel state information. Some of the bits are bits in the quantization information of the fourth superposition coefficient that have different values than the quantization information of the superposition coefficient in the second channel state information, and the fourth superposition coefficient corresponds to the superposition coefficient compared in the second channel state information. The same base information. In the above design, by reporting the special bit of the superposition coefficient with channel similarity of the second device, the third device can restore the channel similarity of the second device according to the common bit of the superposition coefficient with channel similarity of the first device. The full bits of the superposition coefficients.

In a possible design, when the first device performs channel state feedback to the third device based on the second channel state information and the first channel state information, the first device may send the quantization of the superposition coefficient included in the first channel state information to the third device All bits of information. After receiving the second channel state information from the second device, the first device may send the first information to the second device, where the first information is used to indicate a part of the quantization information of the second superposition coefficient included in the second channel state information bits.

In the above manner, after the second terminal device sends the second channel state information to the first terminal device, the first terminal device may report the channel state information of its own terminal device, and instruct the second terminal device to target some superposition coefficients when reporting. Only some bits are reported, so that the CSI feedback overhead can be reduced.

In a possible design, the second superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the first channel state information. Part of the bits are bits in the quantization information of the second superposition coefficient that have different values than the quantization information of the superposition coefficient in the first channel state information, and the superposition coefficient of the second superposition coefficient compared with the first channel state information Corresponding to the same base information. In the above design, by instructing the second terminal device to report the special bit of the superposition coefficient with channel similarity, the network device can restore the second terminal device to have the channel according to the common bits of the superposition coefficient with channel similarity of the first terminal device. The full bits of the superposition coefficient of similarity.

In a possible design, when the first device performs channel state feedback to the third device based on the second channel state information and the first channel state information, the first device may send the quantization of the superposition coefficient included in the first channel state information to the third device All bits of the information and some bits of the quantization information of the second superposition coefficient included in the second channel state information.

In the above manner, after the second terminal device sends the second channel state information to the first terminal device, the first terminal device may report all bits of the quantization information of the superposition coefficient of the first terminal device and some superimposed bits in the second terminal device. special bits of coefficients, so that the CSI feedback overhead can be reduced.

In a possible design, the second superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the first channel state information; some bits in the quantization information of the second superposition coefficient are compared with those in the first channel state information. Bits with different quantization information of the superposition coefficients have different values, and the second superposition coefficient corresponds to the same base information as the superposition coefficient compared with the superposition coefficient in the first channel state information. In the above design, by reporting the special bits of the superposition coefficient with channel similarity of the second terminal device, the network device can restore the channel similarity of the second terminal device according to the common bits of the superposition coefficient with channel similarity of the first terminal device. The full bits of the superposition coefficient of similarity.

In a possible design, the first device may also send second information to the second device, where the second information is used to indicate the first superposition coefficient included in the second channel state information. In the above manner, the first device indicates the partial superposition coefficient of the second device, so that the second device can report the partial superposition coefficient.

In a possible design, the first superposition coefficient is different from the base information corresponding to any superposition coefficient in the first channel state information. In the above manner, the second device may report the part of the superposition coefficient by indicating the different superposition coefficients of the base information of the second device.

In a possible design, the quantization information of the superposition coefficient included in the first channel state information includes at least one item of the following information: at least one bit for indicating phase and at least one bit for indicating amplitude.

In a possible design, the quantization information of the superposition coefficient included in the second channel state information includes at least one item of the following information: at least one bit for indicating the phase and at least one bit for indicating the amplitude.

In a possible design, the second channel state information further includes base information respectively corresponding to at least one superposition coefficient of the second device.

In a possible design, the first channel state information further includes basis information respectively corresponding to at least one superposition coefficient of the first device.

In a fourth aspect, a channel feedback method provided by an embodiment of the present application can be applied to a first device, where the first device is a terminal device, or a chip or a chipset/chip system in the terminal device. The method includes: the first device receives second channel state information from the second device, the second channel state information includes at least one superposition coefficient of the second device, wherein any superposition coefficient in the second channel state information is used to combine with The corresponding base information collectively characterizes the channel state of the second device. The first device sends the first channel state information and the first information to the second device, where the first information is used to indicate part of the bits in the quantization information of the second superposition coefficient included in the second channel state information, wherein the first channel state includes At least one superposition coefficient of the first device, and any superposition coefficient in the first channel state information is used to jointly represent and determine the channel state of the first device with the corresponding base information.

In the embodiment of the present application, based on the correlation of channel characteristics between terminal devices, the first terminal device can instruct the second terminal device to select the reported content according to its own channel state information and the channel state information of the second terminal device. The two terminal equipments report all bits of the quantization information of the superposition coefficient, which can reduce the repeated reporting of the same information, thereby reducing the CSI feedback overhead.

In a possible design, the second superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the first channel state information; some bits in the quantization information of the second superposition coefficient are compared with those in the first channel state information. The quantization information of the superposition coefficient takes bits with different values, and the second superposition coefficient corresponds to the same base information as the superposition coefficient compared with the first channel state information. Through the above design, the second terminal device can report the special bits of the superposition coefficient with the channel similarity, so that the network device can restore the second terminal device with the channel similarity according to the common bits of the superposition coefficient with the channel similarity of the first terminal device. The complete bits of the superposition coefficient of the property.

In a possible design, the first apparatus may further send second information to the second apparatus, where the second information is used to indicate the first superposition coefficient included in the second channel state information. Through the above design, in addition to the superposition coefficient with channel correlation, the second device can also report other superposition coefficients.

In a possible design, the first superposition coefficient is different from the base information corresponding to any superposition coefficient in the first channel state information. Through the above design, the second device can also report different superposition coefficients of the base information.

In a fifth aspect, a channel feedback method provided by an embodiment of the present application may be applied to a first device, and the first device may be a terminal device, or a chip or a chipset/chip system in the terminal device. The method includes: the first device receives second channel state information from the second device, the second channel state information includes at least one superposition coefficient of the second device, wherein any superposition coefficient in the second channel state information is used to combine with The corresponding base information collectively characterizes the channel state of the second device. The first device sends fourth information and fifth information to the second device, where the fourth information is used to indicate some bits in the quantization information of the fourth superposition coefficient of the first device, and the fifth information is used to indicate the third Superposition factor.

In a possible design, the third superposition coefficient is different from the base information corresponding to any superposition coefficient of the second device. The fourth superposition coefficient is the same as the base information corresponding to at least one superposition coefficient of the second device. Some of the bits may be bits of the quantization information of the fourth superposition coefficient that have different values than the quantization information of the superposition coefficient of the second device, and the fourth superposition coefficient and the superposition coefficient of the second device to be compared correspond to the same base. information.

In a possible design, the quantization information of the superposition coefficient of the first device includes at least one item of the following information: at least one bit for indicating the phase and at least one bit for indicating the amplitude.

In a possible design, the quantization information of the superposition coefficient of the second device includes at least one item of the following information: at least one bit for indicating the phase, and at least one bit for indicating the amplitude.

In a sixth aspect, a channel feedback method provided by an embodiment of the present application may be applied to a second device, and the second device may be a terminal device, or a chip or a chipset/chip system in the terminal device. The method includes: the second device sends second channel state information to the first device, the second channel state information includes at least one superposition coefficient of the second device, wherein any superposition coefficient in the second channel state information is used to correspond to The base information of the second device collectively represents the channel state of the second device; the second device receives the third information from the first device, and the third information is used to indicate the information reported by the second device to the third device; the second device reports to the third device according to the third information. The third device sends feedback information.

In the embodiment of the present application, the first terminal device can indicate the content reported by the second terminal device based on the correlation of channel characteristics between the terminal devices. Compared with reporting all bits of the quantization information of the superposition coefficient, repeated reporting of the same information can be reduced. , so that the CSI feedback overhead can be reduced.

In a possible design, the third information includes first information, and the first information is used to indicate part of the bits in the quantization information of the second superposition coefficient included in the second channel state information; the feedback information includes that the second channel state information includes Part of the bits in the quantization information of the second superposition coefficient. In the above manner, the second terminal device only reports some bits for some superposition coefficients when reporting, so that the CSI feedback overhead can be reduced.

In a possible design, the second superposition coefficient is the same as base information corresponding to at least one superposition coefficient in the first channel state information, wherein the first channel state information includes at least one superposition coefficient of the first device, and the first channel state information Any superposition coefficient in the information is used to jointly characterize and determine the channel state of the first device with the corresponding base information; some bits are the quantization information of the superposition coefficient in the quantization information of the second superposition coefficient compared to the superposition coefficient in the first channel state information For different bits, the second superposition coefficient corresponds to the same base information as the superposition coefficient in the first channel state information.

In the above design, by reporting the special bit of the superposition coefficient with channel similarity of the second device, the third device can restore the channel similarity of the second device according to the common bit of the superposition coefficient with channel similarity of the first device. The full bits of the superposition coefficients.

In a possible design, the third information further includes first channel state information; and the feedback information further includes first channel state information. In the above design, the channel state information of the first device may also be reported by the second device.

In a possible design, the third information includes second information, and the second information is used to indicate the first superposition coefficient included in the second channel state information; the feedback information includes the first superposition coefficient included in the second channel state information. In the above manner, the first device indicates the partial superposition coefficient of the second device, so that the second device can report the partial superposition coefficient.

In a possible design, the first superposition coefficient is different from the base information corresponding to any superposition coefficient in the first channel state information, wherein the first channel state information includes at least one superposition coefficient of the first device, and the first Any superposition coefficient in the channel state information is used to jointly characterize and determine the channel state of the first device together with the corresponding base information. In the above manner, the second device may report the part of the superposition coefficient by indicating the different superposition coefficients of the base information of the second device.

In a possible design, the third information includes fourth information, and the fourth information is used to indicate some bits in the quantization information of the fourth superposition coefficient of the first device. In the above design, the second device can report some bits of the first device, thereby saving feedback overhead.

In a possible design, the fourth superposition coefficient is the same as the base information corresponding to at least one superposition coefficient of the second device. Some of the bits may be bits of the quantization information of the fourth superposition coefficient that have different values than the quantization information of the superposition coefficient of the second device, and the fourth superposition coefficient and the superposition coefficient of the second device to be compared correspond to the same base. information. In the above design, the second device reports the special bits of the superposition coefficients with the channel similarity of the first device, so that the third device can restore the superposition coefficients of the first device according to the common bits of the superposition coefficients of the channel similarity of the second device all bits of .

In a possible design, the third information includes fifth information, and the fifth information is used to indicate the third superposition coefficient of the first device. In the above design, the second device can report some of the superposition coefficients of the first device, so that feedback overhead can be saved.

In a possible design, the third superposition coefficient is different from the base information corresponding to any superposition coefficient of the second device. Through the above design, the second device can report different superposition coefficients of the base information of the first device.

In a seventh aspect, the present application provides a channel feedback apparatus, which may be a terminal device, or a chip or a chipset/chip system in the terminal device. The apparatus may include a processing module and a transceiver module. When the apparatus is a terminal device, the processing module may be a processor, and the transceiver module may be a transceiver; the apparatus may further include a storage module, and the storage module may be a memory; the storage module is used for storing instructions, and the processing module The instructions stored in the storage module are executed to perform the corresponding functions in the first aspect or the third aspect or the fourth aspect or the fifth aspect or the sixth aspect. When the device is a chip or a chipset/chip system in a terminal device, the processing module may be a processor, a processing circuit or a logic circuit, etc., and the transceiver module may be an input/output interface, a pin or a circuit, etc.; the processing The module executes the instructions stored in the storage module to perform the corresponding functions in the first aspect or the third aspect or the fourth aspect or the fifth aspect or the sixth aspect. The storage module may be a storage module (eg, register, cache, etc.) within the chip or chipset/chip system, or may be a storage module in the base station located outside the chip or chipset/chip system (eg, only read memory, random access memory, etc.).

In an eighth aspect, the present application provides a communication apparatus, and the apparatus may be a network device, or a chip or a chipset/chip system in the network device. The apparatus may include a processing module and a transceiver module. When the apparatus is a network device, the processing module may be a processor, and the transceiver module may be a transceiver; the apparatus may further include a storage module, and the storage module may be a memory; the storage module is used for storing instructions, and the processing module The instructions stored in the storage module are executed to perform the corresponding functions in the above second aspect. When the device is a chip or a chipset/chip system in a network device, the processing module may be a processor, a processing circuit or a logic circuit, etc., and the transceiver module may be an input/output interface, a pin or a circuit, etc.; the processing The module executes the instructions stored in the storage module to perform the corresponding function in the above second aspect. The storage module may be a storage module (eg, register, cache, etc.) within the chip or chipset/chip system, or may be a storage module in the base station located outside the chip or chipset/chip system (eg, only read memory, random access memory, etc.).

In a ninth aspect, a channel feedback apparatus is provided, comprising: at least one processor. Optionally, a communication interface may also be included. Optionally, a memory may also be included. The communication interface is used to transfer information, and/or messages, and/or data between the device and other devices. The memory is used to store computer-executable instructions, and when the apparatus is running, the processor executes the computer-executable instructions stored in the memory, so that the apparatus executes the first aspect or any one of the first aspect or the third aspect. aspect or any design of the third aspect, or any design of the fourth or fourth aspect, or any design of the fifth or fifth aspect, or any design of the sixth or sixth aspect Methods. The apparatus may be a chip or a chipset/chip system in a terminal device, the processor may be a processing circuit or a logic circuit, etc., and the communication interface may be input and/or output pins or circuits, etc.

In a tenth aspect, a communication apparatus is provided, comprising: at least one processor. Optionally, a communication interface may also be included. Optionally, a memory may also be included. The communication interface is used to transfer information, and/or messages, and/or data between the device and other devices. The memory is used to store computer-executable instructions, and when the apparatus is running, the processor executes the computer-executable instructions stored in the memory, so that the apparatus executes the method described in the second aspect or any design of the second aspect . The apparatus may be a chip or a chipset/chip system in a network device, the processor may be a processing circuit or a logic circuit, or the like, and the communication interface may be an input and/or output pin or circuit, or the like.

In an eleventh aspect, a computer storage medium provided by an embodiment of the present application stores a program instruction. When the program instruction is executed on a communication device, the communication device is made to execute the first to sixth aspects of the embodiment of the present application. A method as described in any of the aspects and any possible designs thereof.

A twelfth aspect, a computer program product provided by an embodiment of the present application, when the computer program product runs on a communication device, enables the communication device to make any one of the first to sixth aspects and any one of the first to sixth aspects of the embodiment of the present application. possible designs of the method described.

A thirteenth aspect is a chip provided by an embodiment of the present application, the chip is coupled with a memory, and a method for executing the first aspect and any possible design thereof, or any of the third aspect or the third aspect of the embodiment of the present application. The method of a design, or the fourth aspect or any of the fourth aspects, or the fifth or fifth aspect, or the sixth or any of the sixth aspects.

A fourteenth aspect provides a chip provided by an embodiment of the present application, the chip is coupled with a memory, and a method for implementing the second aspect of the embodiment of the present application and any possible design thereof.

In a fifteenth aspect, an embodiment of the present application provides a chip, including a communication interface and at least one processor, where the processor operates to execute the first aspect and any possible design method or a third method of the embodiment of the present application. aspect or any design of the third aspect, or any design of the fourth or fourth aspect, or any design of the fifth or fifth aspect, or any design of the sixth or sixth aspect Methods.

In a sixteenth aspect, an embodiment of the present application provides a chip, including a communication interface and at least one processor, where the processor operates to execute the method described in the second aspect of the embodiment of the present application and any possible designs thereof.

It should be noted that, "coupled" in the embodiments of the present application means that two components are directly or indirectly combined with each other.

Description of drawings

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

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

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

4 is a schematic diagram of communication between a network device and a UE according to an embodiment of the present application;

FIG. 5 is a schematic flowchart of a CSI measurement provided by an embodiment of the present application;

6 is a schematic flowchart of a channel feedback method provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of a channel correlation provided by an embodiment of the present application;

8 is a schematic diagram of a superposition coefficient with channel correlation provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of a channel feature provided by an embodiment of the present application;

10 is a schematic flowchart of another channel feedback method provided by an embodiment of the present application;

FIG. 11 is a schematic flowchart of another channel feedback method provided by an embodiment of the present application;

12 is a schematic flowchart of another channel feedback method provided by an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 14 is a schematic structural diagram of another communication apparatus provided by an embodiment of the present application.

detailed description

In order to facilitate the understanding of the embodiments of the present application, the meanings of the main parameters involved in the embodiments of the present application are described below:

1. Base information: such as channel angle information, time delay information, etc., the base information can be represented by parameters such as space domain base vector, time domain base vector, and frequency domain base vector.

Wherein, each spatial basis vector may correspond to a transmit beam (beam) of the transmitting end device. Spatial basis vectors are usually associated with antenna arrays. For example, many parameters involved in the expression of spatial basis vectors can be understood as being used to characterize different properties of antenna arrays.

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

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

2. Superposition coefficient: The superposition coefficient is used to represent the weight of the base information in the weighted summation. Superposition coefficients include magnitude and phase. For example, the superposition coefficient is ae ^jθ , where a is the magnitude and θ is the phase.

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

The technical solutions provided in this application can be applied to various communication systems, for example, the Internet of Things (IoT), the narrowband internet of things (NB-IoT), the long term evolution (long term evolution, LTE), it can also be a fifth generation (5G) communication system, it can also be a hybrid architecture of LTE and 5G, it can also be a new radio (NR) system of the 5th generation (5G) and future communication development. new communication systems, etc. The 5G communication system described in this application may include at least one of a non-standalone (NSA) 5G communication system and an independent (standalone, SA) 5G communication system. The communication system may also be a public land mobile network (PLMN) network, a device-to-device (D2D) network, a machine-to-machine (M2M) network, or other networks.

Referring to FIG. 1 , a communication system is provided in an embodiment of the present application. The communication system includes a network device and six terminal devices, taking UE1 to UE6 as an example. In this communication system, UE1-UE6 can send signals to network equipment on the uplink, and the network equipment can receive the uplink signals sent by UE1-UE6. In addition, UE4 to UE6 may also form a sub-communication system. The network device may send downlink signals to UE1, UE2, UE3, and UE5 on the downlink. UE5 may send signals to UE4 and UE6 on an inter-terminal link (sidelink, SL) based on the D2D technology. FIG. 1 is only a schematic diagram, and the present application does not specifically limit the type of the communication system, and the number and type of devices included in the communication system.

The terminal equipment involved in the embodiments of this application is an entity on the user side that is used to receive or transmit signals. The terminal device may be a device that provides voice and data connectivity to the user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, and the like. The terminal device may also be other processing device connected to the wireless modem. Terminal devices can communicate with one or more core networks through a radio access network (RAN). Terminal equipment may also be referred to as wireless terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point , remote terminal, access terminal, user terminal, user agent, user device, or user equipment, etc. Terminal devices may be mobile terminals, such as mobile phones (or "cellular" phones) and computers with mobile terminals, for example, may be portable, pocket-sized, hand-held, computer-built, or vehicle-mounted mobile devices, which are associated with wireless The access network exchanges language and data. For example, the terminal device may also be a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (personal digital assistant, PDA), and other equipment. Common terminal devices include, for example: mobile phones, tablet computers, notebook computers, PDAs, mobile internet devices (MIDs), wearable devices, such as smart watches, smart bracelets, pedometers, etc. The example is not limited to this. The terminal device involved in the embodiment of the present application may also be a terminal device appearing in a future evolved PLMN, etc., which is not limited in the embodiment of the present application.

In addition, in the embodiment of the present application, the terminal device may also be a terminal device in the IoT system. IoT is an important part of the future development of information technology. Interconnection, the intelligent network of the interconnection of things and things. In the embodiments of the present application, the IoT technology can achieve massive connections, deep coverage, and power saving of terminals through, for example, a narrow band (narrow band, NB) technology.

In addition, in the embodiment of the present application, the terminal device may also include sensors such as smart printers, train detectors, and gas stations, and the main functions include collecting data (part of terminal devices), receiving control information and downlink data of network devices, and sending electromagnetic waves. , to transmit uplink data to the network device.

The network device involved in the embodiments of this application is an entity on the network side that is used to transmit or receive signals. The network device in this embodiment of the present application may be a device in a wireless network, for example, a RAN node that accesses a terminal to the wireless network. For example, the network device may be an evolved base station (evolutional Node B, eNB or e-NodeB) in LTE, or a new radio controller (NR controller), or a gNode B (gNB) in the 5G system. ), it can be a centralized unit (CU), a new wireless base station, a remote radio module, a micro base station, a relay, or a distributed unit , DU), can be a home base station, can be a transmission reception point (transmission reception point, TRP) or a transmission point (transmission point, TP) or any other wireless access device, but the embodiment of the present application is not limited to this. A network device can cover one or more cells.

Exemplarily, the structure of the network device in this embodiment of the present application may be as shown in FIG. 2 . Specifically, the radio access network device may be divided into a CU and at least one DU. The CU may be used to manage or control at least one DU, and may also be referred to as being connected to at least one DU. This structure can disassemble the protocol layers of the wireless access network equipment in the communication system. Some of the protocol layers are centrally controlled by the CU, and the remaining part or all of the protocol layer functions are distributed in the DU, and the CU centrally controls the DU. Taking the wireless access network device as a gNB as an example, the protocol layer of the gNB includes a radio resource control (RRC) layer, a service data adaptation protocol (SDAP) layer, and a packet data convergence protocol (packet data convergence protocol). convergence protocol, PDCP) layer, radio link control (radio link control, RLC) layer, media access control sublayer (media access control, MAC) layer and physical layer. Wherein, exemplarily, the CU can be used to implement the functions of the RRC layer, the SDAP layer and the PDCP layer, and the DU can be used to implement the functions of the RLC layer, the MAC layer and the physical layer. The embodiments of the present application do not specifically limit the protocol stacks included in the CU and DU.

Exemplarily, the CU in this embodiment of the present application may be further divided into one control plane (CU-control plane, CU-CP) network element and multiple user plane (CU-user plane, CU-UP) network elements. Among them, CU-CP can be used for control plane management, and CU-UP can be used for user plane data transmission. The interface between CU-CP and CU-UP can be E1 port. The interface between CU-CP and DU can be F1-C, which is used for the transmission of control plane signaling. The interface between CU-UP and DU can be F1-U, which is used for user plane data transmission. The CU-UP and CU-UP can be connected through the Xn-U port for user plane data transmission. For example, taking the gNB as an example, the structure of the gNB may be as shown in FIG. 3 .

Exemplarily, the communication between the network device and the UE may be as shown in FIG. 4 , and the network device and the UE may exchange RRC signaling through the RRC module. The network device and the UE can exchange media access control control element (MAC CE) signaling through the MAC module. The network device and the UE can exchange uplink/downlink control signaling such as physical uplink control channel (PUCCH)/physical downlink control channel (PDCCH), uplink/downlink data signaling such as physical uplink through PHY Shared channel (physical uplink shared channel, PUSCH)/physical downlink shared channel (physical downlink shared channel, PDSCH), etc.

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

The 5G communication system has higher requirements on system capacity and spectral efficiency. In the 5G communication system, massive MIMO technology plays a crucial role in the spectral efficiency of the system. When the MIMO technology is adopted, when the network device sends data to the UE, modulation coding and signal precoding need to be performed. How the network device sends data to the UE depends on the CSI fed back by the UE to the network device. Therefore, the accuracy of the CSI plays a very important role in the performance of the system.

The basic flow chart of CSI measurement performed by network equipment and UE is shown in Figure 5:

1) The network device sends channel measurement configuration information to the UE, where the channel measurement configuration information is used for channel measurement configuration, such as configuring reference signals, measurement time, and the like.

2) The network device sends a pilot (also referred to as a downlink reference signal) to the UE, where the pilot is used for downlink channel measurement.

3) The UE performs downlink channel measurement according to the pilot frequency sent by the network device, performs calculations such as channel estimation, and feeds back CSI information (such as through the type II codebook in Release 15), which includes rank indicator (rank indicator, RI), channel Specific parameters such as quality indicator (channel quality information, CQI), precoding matrix indicator (precoding matrix indicator, PMI).

4) The network device calculates a precoding vector according to the CSI fed back by the UE, and performs data transmission. Wherein, in step 4), the network device determines the relevant configuration for sending data according to the CSI information fed back by the UE in step 3), which may specifically be: The CQI of the UE determines the modulation order of the data transmitted to the UE and the code rate of the channel coding, and the network device determines the precoding of the data transmitted to the UE according to the PMI fed back by the UE.

Currently, a variety of schemes for acquiring high-precision CSI are provided, such as Type II, dual-domain compression, and CSI acquisition based on angle and delay reciprocity. However, these high-precision CSI acquisition solutions are all implemented for a single user. With the development of NR commercial deployment, the number of users that gNB needs to serve will increase significantly, and in some scenarios, it can even reach 1000+ users. Therefore, the current high-precision CSI acquisition scheme has a large overhead.

Based on this, the embodiments of the present application provide a channel feedback method and apparatus to solve the problem. Among them, the method and the device are based on the same inventive concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

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

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

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

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

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

The measurement reporting method provided by the present application will be specifically described below with reference to the accompanying drawings.

As shown in FIG. 6 , a channel feedback method is provided in an embodiment of the present application. The method can be applied to the communication system shown in FIG. 1 . For ease of understanding, in this embodiment, the method is performed from the perspectives of both sides of the terminal device and the network device. Description, it should be understood that this does not constitute a limitation to the present application, and the present application has improvements on either side of the terminal device and the network device. Specifically, the method can be applied to terminal equipment and network equipment, or can also be applied to chips or chipsets/chip systems of terminal equipment and network equipment. The channel measurement method may specifically include:

S601, the network device generates indication information, where the indication information is used to indicate a reporting method, and the reporting method is to report according to at least one of the following information: bits to be reported in the quantization information of the superposition coefficient of the first terminal device, the first terminal device The number of bits to be reported in the quantization information of the superposition coefficient.

Wherein, the superposition coefficient of the first terminal device is used to represent the channel state of the first terminal device together with the corresponding base information.

Exemplarily, the quantization information of the first terminal device may include at least one item of the following information: at least one bit for indicating phase and at least one bit for indicating amplitude.

In an example, assuming that the quantization information of the superposition coefficient of the first terminal device includes 7 bits, the network device may instruct the first terminal device to report 3 bits, or instruct the first terminal device to report the lowest 3 bits, and so on.

In another example, it is assumed that the quantization information of the superposition coefficient of the first terminal device includes 3 bits for quantizing amplitude and 4 bits for quantizing phase, the network device may instruct the first terminal device to report 3 bits for quantizing amplitude The least significant bit of the bits, and the least significant 2 bits of the 4 bits used to quantize the phase.

In an exemplary illustration, the bits to be reported in the superposition coefficient of the first terminal device may be: the value of the quantization information of the superposition coefficient of the first terminal device is different from that of the quantization information of the superposition coefficient of the second terminal device. , the superposition coefficient of the first terminal device and the superposition coefficient of the second terminal device to be compared correspond to the same base information.

In a massive user scenario, there are often users with high channel correlation, for example, UE1 and UE2 in FIG. 7 . The channel correlation between UE1 and UE2 is relatively high. The eigenvectors (V1, V2) corresponding to the channels of these two UEs correspond to the same base information (such as angle-delay information). Taking Figure 7 as an example, UE1 and UE2 correspond to the same The base information e ₁ and e ₂ of UE1 is based on the superposition coefficients α ₁ and α ₂ of e ₁ and e ₂ , which is similar to the superposition coefficients β ₁ and β ₂ of UE2 based on e ₁ and e ₂ , that is, α ₁ and β ₁ Similarly, α ₂ is similar to β ₂ , as shown in Figure 8. At least one bit in the quantization information of two similar superposition coefficients has the same value. In the above manner, the network device instructs the first terminal device to report the quantization information of the superposition coefficient compared to the quantization of the superposition coefficient of the second terminal device. Bits with different information values can reduce feedback overhead compared to reporting all the bits of the superposition coefficient.

The quantization information of the second terminal device may also include at least one item of the following information: at least one bit for indicating the phase, and at least one bit for indicating the amplitude.

For the convenience of description, the bits with the same value in the quantization information of the superposition coefficients corresponding to the same base information are called common bits, and the bits with different values in the quantization information of the superposition coefficients corresponding to the same base information are called as common bits. special bits.

In some embodiments, the indication information may also be used to indicate a superposition coefficient to be reported in a reporting manner. For example, the first terminal device may correspond to at least one superposition coefficient, and the indication information may also be used to indicate a superposition coefficient to be reported in a reporting manner among the at least one superposition coefficient. In an example, it is assumed that the first terminal device has 4 superposition coefficients, and the quantization information of each superposition coefficient includes 3 bits for quantizing amplitude and 4 bits for quantizing phase. The network device may instruct the first superposition coefficient and the second superposition coefficient to report the lowest bit of the 3 bits used to quantize the amplitude, and the lowest 2 bits of the 4 bits used to quantize the phase, the third superposition coefficient and The fourth superposition coefficient reports all bits.

For example, as shown in FIG. 9, the channel characteristics of the first terminal device

Channel characteristics of the second terminal equipment

The first terminal device and the second terminal device use the same base information S and F ^H , and the superposition coefficient of the first terminal device

and the superposition factor of the second terminal device

similar, suppose,

and

The quantization information includes 4 bits, where,

and

In the quantization information of , the first 3 bits from high order to low order are common bits, and the lowest order bits are special bits. The network device may instruct the second terminal device to report

All bits of , indicating that the first terminal equipment reports

The special bits in , that is, the least significant bit. Therefore, the network device can

The common bits in , that is, the first 3 bits from high to low, and

The special bits in , ie the least significant bits, recover all the bits of the superposition coefficient of the first terminal device.

In an implementation manner, when the network device generates the indication information, it may be implemented in the following manner: the network device determines at least one item of the following bit information: A special bit in the quantization information of the coefficient; compared with the quantization information of the superposition coefficient of the second terminal device, the common bit in the quantization information of the superposition coefficient of the first terminal device. That is, the bits in the quantization information of the superposition coefficient of the first terminal device are different from those of the quantization information of the superposition coefficient of the second terminal device, and the quantization information of the superposition coefficient of the first terminal device is different from that of the second terminal device. The quantization information of the superposition coefficients of the first terminal device takes the same bits, wherein the superposition coefficients of the first terminal device and the superposition coefficients of the second terminal device that are compared in the superposition coefficients correspond to the same base information. The network device generates indication information according to the determined bit information.

S602, the network device sends the indication information to the first terminal device. Correspondingly, the first terminal device receives the indication information.

S603, the first terminal device performs channel state feedback to the network device based on the indication information.

In an implementation manner, when the first terminal device performs channel state feedback to the network device based on the indication information, it may not report the base information corresponding to the superposition coefficient reported in the above-mentioned reporting manner.

For example, when the first terminal device performs channel state feedback to the network device based on the indication information, it may send channel state feedback information to the network device, where the channel state feedback information includes at least one of the following information: quantization information of the first superposition coefficient, first The base information corresponding to the superposition coefficient and the information indicated by the reporting method in the quantization information of the second superposition coefficient, the second superposition coefficient is the superposition coefficient indicated by the indication information, and the first superposition coefficient is the division indication in at least one superposition coefficient of the first terminal device A superposition coefficient other than the superposition coefficient indicated by the information. Correspondingly, the network device receives the channel state feedback information.

In some embodiments, before generating the indication information, the network device may determine that the base information used by the first terminal device is the same as at least one of the base information used by the second terminal device.

For example, the network device may use the uplink channel characteristics of the first terminal device and the second terminal device to learn that at least one of the same base information exists in the base information used by the two terminal devices.

For another example, the network device may also determine, based on the channel measurement results historically reported by the first terminal device and the channel measurement results historically reported by the second terminal device, at least one of the base information used by the first terminal device and the base information used by the second terminal device. A base information is the same.

As shown in FIG. 10 , another channel feedback method is provided in this embodiment of the application. This method can be applied to the communication system shown in FIG. 1 . For ease of understanding, in this embodiment, the first terminal device and the second terminal The angles on both sides of the device are described, and it should be understood that this does not constitute a limitation to the present application, and the present application has improvements on either side of the first terminal device and the second terminal device. Specifically, the method can be applied to the first terminal device and the second terminal device, or can also be applied to chips or chipsets/chip systems of the first terminal device and the second terminal device. The following applies to the first terminal device and the second terminal device as an example for description. The channel feedback method may specifically include:

S1001, the second terminal device sends second channel state information to the first terminal device, where the second channel state information includes at least one superposition coefficient of the second terminal device. Correspondingly, the first terminal device receives the second channel state information.

Wherein, any superposition coefficient in the second channel state information is used to represent the channel state of the second terminal device together with the corresponding base information.

Exemplarily, the second channel state information may include all or part of the superposition coefficients of the second terminal device, which is not specifically limited here.

Optionally, if the second channel state information includes part of the superposition coefficient of the second terminal device, another part of the superposition coefficient of the second terminal device may be reported by the second terminal device itself, for example, the second terminal device reports the other part of the superposition coefficient to the network device. A part of all bits of the quantization information of the superimposed coefficients, etc.

The second channel state information may further include base information respectively corresponding to at least one superposition coefficient of the second terminal device.

S1002, the first terminal device performs channel state feedback to the network device based on the second channel state information and the first channel state information, where the first channel state information includes at least one superposition coefficient of the first terminal device.

Any superposition coefficient in the first channel state information is used to jointly characterize and determine the channel state of the first terminal device together with the corresponding base information.

The first channel state information may further include base information respectively corresponding to at least one superposition coefficient of the first terminal device.

In a massive user scenario, there are often users with high channel correlation, for example, UE1 and UE2 in FIG. 7 . The channel correlation between UE1 and UE2 is relatively high. The eigenvectors (V1, V2) corresponding to the channels of these two UEs correspond to the same base information (such as angle-delay information). Taking Figure 7 as an example, UE1 and UE2 correspond to the same The base information e ₁ and e ₂ of UE1 is based on the superposition coefficients α ₁ and α ₂ of e ₁ and e ₂ , which is similar to the superposition coefficients β ₁ and β ₂ of UE2 based on e ₁ and e ₂ , that is, α ₁ and β ₁ Similarly, α ₂ is similar to β ₂ , as shown in Figure 8. At least one bit in the quantization information of two similar superposition coefficients has the same value. For the convenience of description, the bits with the same value in the quantization information of the superposition coefficients corresponding to the same base information are called common bits, and the bits with different values in the quantization information of the superposition coefficients corresponding to the same base information are called as the common bits. special bits.

Exemplarily, the quantization information may include at least one item of the following information: at least one bit for indicating phase and at least one bit for indicating amplitude.

In an implementation manner, when the first terminal device performs channel state feedback to the network device based on the second channel state information and the first channel state information, the first terminal device may report the channel state information of the first terminal device and the second terminal device.

In a possible implementation manner, the first terminal device may send to the network device all bits of the quantization information of the superposition coefficient included in the first channel state information, all bits of the quantization information of the first superposition coefficient in the second channel state information, and Part of the bits in the quantization information of the second superposition coefficient in the second channel state information.

Exemplarily, the first superposition coefficient is a superposition coefficient in the second channel state information that is different from the base information used by the first terminal device, that is, the base corresponding to the first superposition coefficient and any superposition coefficient in the first channel state information. Information is not the same.

The second superposition coefficient may be the superposition coefficient in the second channel state information that uses the same base information as the first terminal device, that is, the second superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the first channel state information.

The part of bits may be special bits in the quantization information of the second superposition coefficient, that is, the bits in the quantization information of the second superposition coefficient have different values than the quantization information of the superposition coefficient in the first channel state information. The coefficients correspond to the same base information as the superposition coefficients compared in the first channel state information.

In an example, it is assumed that the first terminal device has 4 superposition coefficients, which are respectively superposition coefficients 1 to 4, and the second channel state information includes 3 superposition coefficients of the second terminal device, which are respectively superposition coefficients 5 to 7, wherein , wherein the base information corresponding to the

superposition coefficients

1, 2, and 4 is different from the base information corresponding to the superposition coefficients 5 to 6, the base information corresponding to the superposition coefficient 7 is the same as the base information corresponding to the superposition coefficient 3, and the base information corresponding to the superposition coefficient 7 is the same. The first 3 bits in the quantization information from high order to low order are the same as the first 3 bits in the quantization information of superposition coefficient 3 from high order to low order, and the lowest bit in the quantization information of superposition coefficient 7 is the same as the quantization information of superposition coefficient 3 If the least significant bits are different, the first terminal device may report to the network device all the bits of the quantization information of the superposition coefficients 1 to 4, all the bits of the quantization information of the superposition coefficients 5 to 6, and the lowest bit of the quantization information of the superposition coefficient 7. .

Optionally, the first terminal device may also report the base information corresponding to the superposition coefficient included in the first channel state information and the base information corresponding to the first superposition coefficient to the network device. Taking the above example as an example, the first terminal device may also send the base information corresponding to the superposition coefficients 1 to 4 and the base information corresponding to the superposition coefficients 5 to 6 to the network device.

In another possible implementation manner, the first terminal device may also send to the network device all bits of the quantization information of the superposition coefficient included in the second channel state information, and all the quantization information of the third superposition coefficient in the first channel state information bits and some bits in the quantization information of the fourth superposition coefficient in the first channel state information.

Exemplarily, the third superposition coefficient may be a superposition coefficient in the first channel state information that is different from the base information used by the second terminal device, that is, the third superposition coefficient corresponds to any superposition coefficient in the second channel state information. The base information is not the same.

The fourth superposition coefficient may be the superposition coefficient in the first channel state information that uses the same base information as the second terminal device, that is, the fourth superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the second channel state information.

Some of the bits may be special bits in the quantization information of the fourth superposition coefficient, that is, the bits in the quantization information of the fourth superposition coefficient that have different values than the quantization information of the superposition coefficient in the second channel state information, the fourth superposition coefficient. The superposition coefficient compared with the second channel state information corresponds to the same base information.

In an example, it is assumed that the first terminal device has 4 superposition coefficients, which are respectively superposition coefficients 1 to 4, and the second channel state information includes 3 superposition coefficients of the second terminal device, which are respectively superposition coefficients 5 to 7, wherein , the base information corresponding to the

superposition coefficients

1, 2 and 4 is different from the base information corresponding to the superposition coefficients 5 to 6, the base information corresponding to the superposition coefficient 7 is the same as the base information corresponding to the superposition coefficient 3, and the quantization information of the superposition coefficient 7 The first 3 bits sorted from high order to low order are the same as the first 3 bits in the quantization information of superposition coefficient 3 from high order to low order. The lowest bit in the quantization information of superposition coefficient 7 is the lowest in the quantization information of superposition coefficient 3. If the bits are different, the first terminal device may report to the network device all the bits of the quantization information of the superposition coefficients 5 to 7, all the bits of the quantization information of the

superposition coefficients

1, 2, and 4, and the least significant bit of the quantization information of the superposition coefficient 3. .

Optionally, the first terminal device may also report the base information corresponding to the superposition coefficient included in the second channel state information and the base information corresponding to the third superposition coefficient to the network device. Taking the above example as an example, the first terminal device may also send the base information corresponding to the superposition coefficients 5 to 7, the base information corresponding to the superposition coefficient 1, the base information corresponding to the superposition coefficient 2, and the base information corresponding to the superposition coefficient 4 to the network device.

In the above manner, after the second terminal device sends the second channel state information to the first terminal device, the first terminal device may report the channel state information of the two terminal devices, and when reporting, the superposition coefficients with channel similarity may be reported. Only some bits are reported, so that the CSI feedback overhead can be reduced.

In another implementation manner, when the first terminal device performs channel state feedback to the network device based on the second channel state information and the first channel state information, the first terminal device may report the channel state information of the first terminal device, and send the channel state information to the second terminal device. The third information is used to indicate the information reported by the second terminal device to the network device. The second terminal device sends feedback information to the network device based on the third information.

In a possible implementation manner, the first terminal device may send all bits of the quantization information of the superposition coefficients included in the first channel state information to the network device, and send the first information (that is, the third information includes the first information (that is, the third information includes the first information) to the second terminal device. information), the first information is used to indicate some bits in the quantization information of the second superposition coefficient included in the second channel state information. After receiving the first information, the second terminal device reports part of the bits in the quantization information of the second superposition coefficient to the network device (that is, the feedback information includes part of the bits in the quantization information of the second superposition coefficient included in the second channel state information) .

Exemplarily, the first information may be the second superposition coefficient itself, or may be an identifier (eg, an index) of the second superposition coefficient, or the like.

Optionally, the first terminal device may also send second information (that is, the third information may further include second information) to the second terminal device, where the second information is used to indicate the first superposition coefficient included in the second channel state information. After receiving the second information, the second terminal device reports all bits of the quantization information of the first superposition coefficient to the network device (that is, the feedback information may also include all bits of the quantization information of the first superposition coefficient included in the second channel state information).

Exemplarily, the second information may be the first superposition coefficient itself, or may be an identifier (eg, an index) of the first superposition coefficient, or the like.

Exemplarily, the first superposition coefficient may be a superposition coefficient in the second channel state information that is different from the base information used by the first terminal device, that is, the first superposition coefficient corresponds to any superposition coefficient in the first channel state information. The base information is not the same.

superposition coefficients

1, 2, and 4 is different from the base information corresponding to the superposition coefficients 5 to 6, the base information corresponding to the superposition coefficient 7 is the same as the base information corresponding to the superposition coefficient 3, and the base information corresponding to the superposition coefficient 7 is the same. The first 3 bits in the quantization information from high order to low order are the same as the first 3 bits in the quantization information of superposition coefficient 3 from high order to low order, and the lowest bit in the quantization information of superposition coefficient 7 is the same as the quantization information of superposition coefficient 3 The least significant bits are different.

The first terminal device may report all bits of the quantization information of the superposition coefficients 1 to 4 to the network device, and send the first information and the second information to the second terminal device, where the first information indicates the lowest value among the quantization information of the superposition coefficient 7. Bit by bit, the second information indicates

superposition coefficients

5 and 6. After receiving the first information and the second information, the second terminal device may report the least significant bit in the quantization information of the superposition coefficient 7 and all the bits of the quantization information of the

superposition coefficients

5 and 6 to the network device.

Optionally, the first terminal device may also report the base information corresponding to the superposition coefficient included in the first channel state information to the network device.

The second terminal device may also report the base information corresponding to the first superposition coefficient to the network device.

Taking the above example as an example, the first terminal device may also send the base information corresponding to the superposition coefficients 1 to 4 to the network device, and the second terminal device may also send the base information corresponding to the

superposition coefficients

5 and 6 to the network device.

In the above manner, after the second terminal device sends the second channel state information to the first terminal device, the first terminal device can report the channel state information of its own terminal device, and instruct the second terminal device to report the channel state information for the channel similar to the first terminal device. Only part of the bits are reported for the unique superposition coefficients, so that the CSI feedback overhead can be reduced.

In another possible implementation manner, the first terminal device may send to the network device all bits of the quantization information of the superposition coefficients included in the first channel state information, and all bits of the quantization information of the second superposition coefficients included in the second channel state information part of the bits.

The second information may be the first superposition coefficient itself, or may be an identifier (eg, an index) of the first superposition coefficient, or the like.

superposition coefficients

The first terminal device may report all bits of the quantization information of the superposition coefficients 1 to 4 and the least significant bit of the quantization information of the superposition coefficient 7 to the network device, and send second information to the second terminal device, where the second information indicates the

superposition Factors

5 and 6. After receiving the second information, the second terminal device may report all bits of the quantization information of the

superposition coefficients

5 and 6 to the network device.

superposition coefficients

5 and 6 to the network device.

In the above manner, after the second terminal device sends the second channel state information to the first terminal device, the first terminal device can report all bits of the quantization information of the superposition coefficient of the first terminal device and the channel state in the second terminal device. The special bits of the superposition coefficients of similarity can reduce the CSI feedback overhead.

In an implementation manner, when the first terminal device performs channel state feedback to the network device based on the second channel state information and the first channel state information, it may report all bits of the quantization information of the third superposition coefficient in the first channel state information and Part of the bits in the quantization information of the fourth superposition coefficient in the first channel state information. Optionally, the second terminal device may report all bits of the quantization information of the superposition coefficient in the second channel state information to the network device.

superposition coefficients

The first terminal device may report all bits of the quantization information of the

superposition coefficients

1, 2, and 4, and the least significant bit of the quantization information of the superposition coefficient 3 to the network device. The second terminal device may report all bits of the quantization information of the superposition coefficients 5-7 to the network device.

Optionally, the first terminal device may also report the base information corresponding to the third superposition coefficient to the network device.

The second terminal device may also report the base information corresponding to the superposition coefficient in the second channel state information to the network device.

Taking the above example as an example, the first terminal device can also send the base information corresponding to the superposition coefficient 1, the base information corresponding to the superposition coefficient 2, and the base information corresponding to the superposition coefficient 4 to the network device, and the second terminal device can also send to the network device. Base information corresponding to superposition coefficients 5 to 7.

In the above manner, after the second terminal device sends the second channel state information to the first terminal device, the first terminal device only reports some bits for superposition coefficients with channel similarity when reporting, thereby reducing CSI feedback overhead.

In some embodiments, the first terminal device may determine the first superposition coefficient, the second superposition coefficient, the third superposition coefficient, and the fourth superposition coefficient in any of the following two ways:

Mode 1, the second channel state information sent by the second terminal device to the first terminal device includes the at least one superposition coefficient corresponding to the base information respectively, and the first terminal device is based on the base information included in the second channel state information and each superposition of its own. The base information corresponding to the coefficients determines the first superposition coefficient, the second superposition coefficient, the third superposition coefficient, and the fourth superposition coefficient.

Method 2: The network device determines the first superposition coefficient, the second superposition coefficient, the third superposition coefficient, and the fourth superposition coefficient, and instructs the first terminal device which coefficients are the first superposition coefficient, which coefficients are the second superposition coefficient, and which coefficients are the third superposition coefficients, and which coefficients are the fourth superposition coefficients. Exemplarily, the network device may determine the first superposition coefficient, the second superposition coefficient, the third superposition coefficient, and the fourth superposition coefficient by using the uplink channel characteristics of the first terminal device and the second terminal device. Alternatively, the network device may also determine the first superposition coefficient, the second superposition coefficient, the third superposition coefficient, and the fourth superposition coefficient based on the channel measurement results historically reported by the first terminal device and the channel measurement results historically reported by the second terminal device.

In this embodiment of the present application, based on the correlation of channel characteristics between terminal devices, the terminal device may instruct a terminal device with channel similarity to report some bits in the quantization information of the superposition coefficient, compared to all the bits in the quantization information of the superposition coefficient reported. bit, the repeated reporting of the same information can be reduced, thereby reducing the CSI feedback overhead.

As shown in FIG. 11 , another channel feedback method is provided in this embodiment of the present application. This method can be applied to the communication system shown in FIG. 1 . For ease of understanding, in this embodiment, the first terminal device and the second terminal The angles on both sides of the device are described, and it should be understood that this does not constitute a limitation to the present application, and the present application has improvements on either side of the first terminal device and the second terminal device. Specifically, the method can be applied to the first terminal device and the second terminal device, or can also be applied to chips or chipsets/chip systems of the first terminal device and the second terminal device. The following applies to the first terminal device and the second terminal device as an example for description. The channel measurement method may specifically include:

For details of step S1101, reference may be made to step S1001, which will not be repeated here.

S1102: The first terminal device sends first channel state information and first information to the second terminal device, where the first information is used to indicate some bits in the quantization information of the second superposition coefficient included in the second channel state information.

The first channel state information includes at least one superposition coefficient of the first terminal device, and any superposition coefficient in the first channel state information is used to jointly represent and determine the channel state of the first terminal device with the corresponding base information.

S1103, the second terminal device reports the first channel state information and some bits in the quantization information of the second superposition coefficient to the network device.

The first channel state information may further include base information respectively corresponding to at least one superposition coefficient of the first terminal device. That is to say, the second terminal device may also report the base information included in the first channel state information to the network device.

Optionally, the first terminal device may also send second information to the second terminal device, where the second information is used to indicate the first superposition coefficient included in the second channel state information.

The second terminal device may also report the base information of the first superposition coefficient to the network device.

Exemplarily, the quantization information of the superposition coefficient of the first terminal device may include at least one item of the following information: at least one bit for indicating the phase, and at least one bit for indicating the amplitude.

The quantization information of the superposition coefficient of the second terminal device may include at least one item of the following information: at least one bit for indicating the phase, and at least one bit for indicating the amplitude.

superposition coefficients

The first terminal device may send superposition coefficients 1 to 4 and first information to the second terminal device, where the first information indicates the least significant bit of the quantization information of the superposition coefficient 7, and the second terminal device may report the superposition coefficients 1 to 1 to the network device. 4 all bits of the quantization information and the least significant bits of the quantization information of the superposition coefficient 7. Optionally, the first terminal device may also send second information to the second terminal device, where the second information is used to indicate the superposition coefficients 5 to 6, and the second terminal device may also report the quantization information of the superposition coefficients 5 to 6 to the network device. all bits of .

Optionally, the first terminal device may also send the base information corresponding to the superposition coefficients 1 to 4 to the second terminal device, and the second terminal device may also send the base information corresponding to the superposition coefficients 1 to 4 and the superposition coefficients 5 to 5 to the network device. 6 Corresponding base information.

For the manner in which the first terminal device determines the first superposition coefficient, the second superposition coefficient, the third superposition coefficient, and the fourth superposition coefficient, for details, please refer to the method shown in FIG. 10 for the first terminal device to determine the first superposition coefficient and the second superposition coefficient , the third superposition coefficient, and the related description of the fourth superposition coefficient, which will not be repeated here.

As shown in FIG. 12 , another channel feedback method is provided in this embodiment of the present application. This method can be applied to the communication system shown in FIG. 1 . For ease of understanding, in this embodiment, from the perspectives of both sides of the terminal device and the network device For description, it should be understood that this does not constitute a limitation to the present application, and the present application has improvements on either side of the terminal device and the network device. Specifically, the method can be applied to terminal equipment and network equipment, or can also be applied to chips or chipsets/chip systems of terminal equipment and network equipment. The channel measurement method may specifically include:

For details of step S1201, reference may be made to step S1001, which will not be repeated here.

S1202, the first terminal device sends fourth information and fifth information to the second terminal device, where the fourth information is used to indicate some bits in the quantization information of the fourth superposition coefficient of the first terminal device, and the fifth information is used to indicate the first A third superposition coefficient of a terminal device.

Exemplarily, the third information may be the fourth superposition coefficient itself, or may be an identifier (eg, an index) of the fourth superposition coefficient, or the like. The fifth information may be the third superposition coefficient itself, or may be an identifier (eg, an index) of the third superposition coefficient, or the like.

Exemplarily, the third superposition coefficient may be a superposition coefficient that is different from the base information used by the second terminal device among the superposition coefficients of the first terminal device, that is, the third superposition coefficient corresponds to any superposition coefficient of the second terminal device. The base information is different.

The fourth superposition coefficient may be a superposition coefficient of the superposition coefficients of the first terminal device using the same base information as that of the second terminal device, that is, the fourth superposition coefficient is the same as the base information corresponding to at least one superposition coefficient of the second terminal device.

Some of the bits may be special bits in the quantization information of the fourth superposition coefficient, that is, the bits in the quantization information of the fourth superposition coefficient have different values than the quantization information of the superposition coefficient of the second terminal device, and the fourth superposition coefficient is the same as that of the second terminal device. The superposition coefficients compared by the second terminal device correspond to the same base information.

S1203: The second terminal device reports some bits of the quantization information of the fourth superposition coefficient, all bits of the quantization information of the third superposition coefficient, and all bits of the quantization information of the superposition coefficient of the second terminal device to the network device.

Optionally, the first terminal device may also send base information corresponding to the third superposition coefficient to the second terminal device, and the second terminal device may also report base information corresponding to the third superposition coefficient to the network device.

The second terminal device may also report the base information corresponding to the superposition coefficient of the second terminal device to the network device.

superposition coefficients

The first terminal device may send fourth information and fifth information to the second terminal device, where the fourth information indicates the least significant bit of the quantization information of the superposition coefficient 3, and the fifth information is used to indicate the

superposition coefficients

1, 2, and 4.

The second terminal device may report all the bits of the quantization information of the superposition coefficients 5 to 7, the least significant bits of the quantization information of the superposition coefficient 3, all the bits of the quantization information of the superposition coefficient 1, and the quantization of the superposition coefficient 2 to the network device All bits of information, and all bits of quantized information of the superposition coefficient 4.

Optionally, the first terminal device may also send the base information corresponding to the

superposition coefficients

1, 2, and 4 to the second terminal device, and the second terminal device may also report the base information corresponding to the

superposition coefficients

1, 2, and 4 to the network device. information.

The second terminal device may also send the base information corresponding to the superposition coefficients 5 to 7 to the network device.

Based on the same technical concept as the method embodiments, the embodiments of the present application provide a communication device. The structure of the communication apparatus may be as shown in FIG. 13 , including a processing unit 1301 and a transceiver unit 1302 .

In an implementation manner, the communication apparatus may be specifically used to implement the method performed by the first terminal device in the embodiment of FIG. 6 , and the apparatus may be the first terminal device itself, or a chip or chipset in the first terminal device. / A system-on-a-chip or part of a chip used to perform the function of the associated method. The transceiver unit 1302 is used to receive indication information from a third device, the indication information is used to indicate a reporting method, and the reporting method is to report according to at least one of the following information: the quantization information of the superposition coefficient of the communication device needs to be reported The number of bits that need to be reported in the quantization information of the superposition coefficient of the communication device, wherein the superposition coefficient of the communication device is used to represent the channel state of the communication device together with the corresponding base information; the processing unit 1301 is used for The channel state feedback is performed to the third device based on the indication information.

Exemplarily, the communication device corresponds to at least one superposition coefficient; the indication information is further used to indicate a superposition coefficient to be reported in the at least one superposition coefficient in a reporting manner.

Optionally, the processing unit 1301 is specifically configured to: send channel state feedback information to the third device through the transceiver unit 1302, where the channel state feedback information includes at least one of the following information: quantization information of the first superposition coefficient, first superposition coefficient The corresponding base information and the information indicated by the reporting method in the quantization information of the second superposition coefficient, the second superposition coefficient is the superposition coefficient indicated by the indication information, and the first superposition coefficient is at least one superposition coefficient divided by the superposition coefficient indicated by the indication information.

Exemplarily, the bits that need to be reported in the superposition coefficient of the communication device are: bits in the quantization information of the superposition coefficient of the communication device that have different values than the quantization information of the superposition coefficient of the second device, the communication device The superposition coefficient of and the superposition coefficient of the second device for comparison correspond to the same base information.

Exemplarily, the quantization information of the superposition coefficient of the communication apparatus includes at least one item of the following information: at least one bit for indicating phase and at least one bit for indicating amplitude.

In an implementation manner, the communication apparatus may be specifically used to implement the method executed by the network device in the embodiment of FIG. Used to perform part of the function of the associated method. The processing unit 1301 is used to generate indication information, and the indication information is used to indicate a reporting method, and the reporting method is to report according to at least one of the following information: bits to be reported in the quantization information of the superposition coefficient of the first device, the first The number of bits to be reported in the quantization information of the superposition coefficient of a device, wherein the superposition coefficient of the first device is used to represent the channel state of the first device together with the corresponding base information; the transceiver unit 1302 is used for sending to the first device. Instructions.

Exemplarily, the first device corresponds to at least one superposition coefficient; the indication information is further used to indicate a superposition coefficient to be reported in the at least one superposition coefficient in a reporting manner.

Optionally, the processing unit 1301 is further configured to: after sending the indication information to the first device, receive channel state feedback information from the first device, where the channel state feedback information includes at least one of the following information: The quantization information, the base information corresponding to the first superposition coefficient, and the information indicated by the reporting method in the quantization information of the second superposition coefficient, the second superposition coefficient is the superposition coefficient indicated by the indication information, and the first superposition coefficient is the division indication in at least one superposition coefficient The stacking factor indicated by the information.

Exemplarily, the quantization information includes at least one item of the following information: at least one bit for indicating phase and at least one bit for indicating amplitude.

Optionally, the processing unit 1301 is further configured to: before generating the indication information, determine that the substrate information used by the first device is the same as at least one of the substrate information used by the second device.

Optionally, when generating the indication information, the processing unit 1301 is specifically configured to: determine at least one item of the following bit information: the quantization information of the superposition coefficient of the first device is compared with the quantization information of the superposition coefficient of the second device. Bits with different values, in the quantization information of the superposition coefficient of the first device, have the same value as the quantization information of the superposition coefficient of the second device; the indication information is generated according to the determined bit information.

Optionally, the processing unit 1301, when determining that the base information used by the first device is the same as at least one of the base information used by the second device, is specifically configured to: based on the uplink channel characteristics of the first device and the characteristics of the second device. Uplink channel characteristics, determine that the base information used by the first device is the same as at least one base information in the base information used by the second device;

Optionally, the processing unit 1301, when it is determined that the base information used by the first device is the same as at least one of the base information used by the second device, is specifically configured to: based on the channel measurement results historically reported by the first device and the second base information. According to the channel measurement results reported by the device history, it is determined that the base information used by the first device is the same as at least one of the base information used by the second device.

In an implementation manner, the communication apparatus may be specifically used to implement the method performed by the first terminal device in the embodiment of FIG. 10 , and the apparatus may be the first terminal device itself, or may be a chip or a chipset in the first terminal device. / A system-on-a-chip or part of a chip used to perform the function of the associated method. The transceiver unit 1302 is configured to receive second channel state information from the second device, where the second channel state information includes at least one superposition coefficient of the second device, wherein any superposition coefficient in the second channel state information is used for jointly characterize the channel state of the second device with the corresponding base information;

The processing unit 1301 is configured to perform channel state feedback to the third device based on the second channel state information and the first channel state information, where the first channel state information includes at least one superposition coefficient of the communication device, and any one of the first channel state information. A superposition coefficient is used together with the corresponding base information to characterize and determine the channel state of the communication device.

Optionally, the processing unit 1301 is specifically configured to: send all bits of the quantization information of the superposition coefficient included in the first channel state information and the quantization information of the first superposition coefficient in the second channel state information to the third device through the transceiver unit 1302 All bits of , and some bits of the quantization information of the second superposition coefficient in the second channel state information.

Exemplarily, the first superposition coefficient is different from the base information corresponding to any superposition coefficient in the first channel state information; the second superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the first channel state information; is the bit of the quantization information of the second superposition coefficient that takes a different value than the quantization information of the superposition coefficient in the first channel state information, and the second superposition coefficient corresponds to the same base as the superposition coefficient compared with the superposition coefficient in the first channel state information information.

Optionally, the processing unit 1301 is specifically configured to: send all the bits of the quantization information of the superposition coefficient included in the second channel state information and the quantization information of the third superposition coefficient in the first channel state information to the third device through the transceiver unit 1302 All bits of , and some bits of the quantization information of the fourth superposition coefficient in the first channel state information.

Exemplarily, the third superposition coefficient is different from the base information corresponding to any superposition coefficient in the second channel state information; the fourth superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the second channel state information; is the bit of the quantization information of the fourth superposition coefficient that has a different value than the quantization information of the superposition coefficient in the second channel state information, and the fourth superposition coefficient and the superposition coefficient compared in the second channel state information correspond to the same base information.

Optionally, the processing unit 1301 is specifically configured to: send all bits of the quantization information of the superposition coefficients included in the first channel state information to the third device through the transceiver unit 1302; the transceiver unit 1302 is further configured to: After the device obtains the second channel state information, the device sends the first information to the second device, where the first information is used to indicate some bits in the quantization information of the second superposition coefficient included in the second channel state information.

Exemplarily, the second superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the first channel state information; some bits are the quantization of the superposition coefficient in the quantization information of the second superposition coefficient compared to the superposition coefficient in the first channel state information. For bits with different information values, the second superposition coefficient corresponds to the same base information as the superposition coefficient compared with the first channel state information.

Optionally, the processing unit 1301 is specifically configured to: send all bits of the quantization information of the superposition coefficient included in the first channel state information and the quantization of the second superposition coefficient included in the second channel state information to the third device through the transceiver unit 1302 Part of the bits in the message.

Exemplarily, the second superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the first channel state information; some bits are superposition coefficients compared in the quantization information of the second superposition coefficient compared to the first channel state information. Different bits of the quantization information of the quantization information have different values, and the second superposition coefficient corresponds to the same base information as the superposition coefficient in the first channel state information.

Optionally, the transceiver unit 1302 is further configured to: send second information to the second device, where the second information is used to indicate the first superposition coefficient included in the second channel state information.

Exemplarily, the first superposition coefficient is different from the base information corresponding to any superposition coefficient in the first channel state information.

Exemplarily, the quantization information of the superposition coefficient of the first apparatus includes at least one item of the following information: at least one bit for indicating the phase, and at least one bit for indicating the amplitude.

Exemplarily, the second channel state information further includes base information respectively corresponding to at least one superposition coefficient of the second device.

Exemplarily, the first channel state information further includes base information respectively corresponding to at least one superposition coefficient of the communication device.

In an implementation manner, the communication apparatus may be specifically used to implement the method executed by the first terminal device in the embodiment of FIG. 11 , and the apparatus may be the first terminal device itself, or a chip or chipset in the first terminal device. / A system-on-a-chip or part of a chip used to perform the function of the associated method. Wherein, the transceiver unit 1302 is used to communicate with the second device; the processing unit 1301 is used to receive the second channel state information from the second device through the transceiver unit 1302, and the second channel state information includes at least one superposition of the second device. coefficient, wherein any superposition coefficient in the second channel state information is used to represent the channel state of the second device together with the corresponding base information; and, the first channel state information and the first channel state information and the first information, the first information is used to indicate part of the bits in the quantization information of the second superposition coefficient included in the second channel state information, wherein the first channel state includes at least one superposition coefficient of the communication device, and the first channel state information includes at least one superposition coefficient of the communication device. Any superposition coefficient is used to jointly characterize and determine the channel state of the first device together with the corresponding base information.

Optionally, the processing unit 1301 is further configured to: send second information to the second device through the transceiver unit 1302, where the second information is used to indicate the first superposition coefficient included in the second channel state information.

Exemplarily, the quantization information of the superposition coefficient included in the second channel state information includes at least one item of the following information: at least one bit for indicating a phase, and at least one bit for indicating an amplitude.

In an implementation manner, the communication apparatus may be specifically used to implement the method executed by the second terminal device in the embodiment of FIG. 10 or FIG. 11 , and the apparatus may be the second terminal device itself or a chip in the second terminal device. or a part of a chipset/system-on-chip or chip for performing the function of the associated method. Wherein, the transceiver unit 1302 is used to communicate with the first device; the processing unit 1301 is used to send second channel state information to the first device through the transceiver unit 1302, where the second channel state information includes at least one superposition coefficient of the communication device , wherein any superposition coefficient in the second channel state information is used to represent the channel state of the communication device together with the corresponding base information; further, the transceiver unit 1302 receives third information from the first device, the third information information for instructing the communication device to report to the third device; and sending feedback information to the third device through the transceiver unit 1302 according to the third information.

Exemplarily, the third information includes first information, and the first information is used to indicate part of the bits in the quantization information of the second superposition coefficient included in the second channel state information; the feedback information includes the second superposition included in the second channel state information. Part of the bits in the quantization information of the coefficients.

Exemplarily, the second superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the first channel state information, wherein the first channel state information includes at least one superposition coefficient of the first device, and any of the first channel state information includes at least one superposition coefficient of the first device. A superposition coefficient is used to represent and determine the channel state of the first device together with the corresponding base information; some bits are bits that are different from the quantization information of the superposition coefficient in the quantization information of the second superposition coefficient compared to the quantization information of the superposition coefficient in the first channel state information, The second superposition coefficient corresponds to the same base information as the superposition coefficient compared in the first channel state information.

Exemplarily, the third information further includes first channel state information; and the feedback information further includes first channel state information.

Exemplarily, the third information includes second information, and the second information is used to indicate the first superposition coefficient included in the second channel state information; the feedback information includes the first superposition coefficient included in the second channel state information.

Exemplarily, the first superposition coefficient is different from the base information corresponding to any superposition coefficient in the first channel state information, wherein the first channel state information includes at least one superposition coefficient of the first device, and the first channel state information includes at least one superposition coefficient of the first device. Any superposition coefficient of is used to jointly characterize and determine the channel state of the first device with the corresponding base information.

Exemplarily, the first channel state information further includes basis information respectively corresponding to at least one superposition coefficient of the first device.

In an implementation manner, the communication apparatus may be specifically used to implement the method executed by the first terminal device in the embodiment of FIG. 12 , and the apparatus may be the first terminal device itself, or a chip or a chipset in the first terminal device. / A system-on-a-chip or part of a chip used to perform the function of the associated method. The transceiver unit 1302 may be specifically configured to communicate with the second terminal device, for example, receive the second channel state information sent by the second terminal, and send fourth information and fifth information to the second terminal device. The processing unit 1301 may specifically be used to control the transceiver unit 1302 to communicate with the second terminal device, and may also be used to implement other actions, such as determining the fourth information and the fifth information, etc., which will not be repeated here.

In an implementation manner, the communication apparatus may be specifically used to implement the method executed by the second terminal device in the embodiment of FIG. 12 , and the apparatus may be the second terminal device itself, or a chip or chipset in the second terminal device. / A system-on-a-chip or part of a chip used to perform the function of the associated method. The transceiver unit 1302 may be specifically configured to communicate with the first terminal device, for example, send the second channel state information to the first terminal, receive fourth information and fifth information sent by the first terminal device, and so on. The processing unit 1301 may specifically be used to control the transceiver unit 1302 to communicate with the first terminal device, and may also be used to implement other actions, such as determining the fourth information and the fifth information, etc., which will not be repeated here.

The division of modules in the embodiments of the present application is schematic, and is only a logical function division. In actual implementation, there may be other division methods. In addition, the functional modules in the various embodiments of the present application may be integrated into one processing unit. In the device, it can also exist physically alone, or two or more modules can be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware, or may be implemented in the form of software function modules, or a combination of hardware and software function modules. It can be understood that, for the functions or implementations of each module in the embodiments of the present application, further reference may be made to the related descriptions of the method embodiments.

In a possible manner, the communication device may be as shown in FIG. 14 , and the communication device may be a communication device or a chip in the communication device, where the communication device may be a device or a third device. The apparatus may include a processor 1401 , a communication interface 1402 , and a memory 1403 . The processing unit 1301 may be the processor 1401 . The transceiver unit 1302 may be the communication interface 1402 .

The processor 1401 may be a central processing unit (central processing unit, CPU), or a digital processing unit, or a processing circuit or a logic circuit, or the like. The communication interface 1402 may be a transceiver, an interface circuit such as a transceiver circuit, etc., a transceiver chip, or an input and/or output pin or circuit on a chip or a chipset/chip system, and the like. The apparatus further includes: a memory 1403 for storing programs executed by the processor 1401 . The memory 1403 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as random access memory (random access memory) -access memory, RAM). Memory 1403 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

The processor 1401 is configured to execute the program code stored in the memory 1403, and is specifically configured to execute the actions of the above-mentioned processing unit 1301, which will not be described herein again. The communication interface 1402 is specifically configured to perform the operations of the transceiving unit 1302 as described above, and details are not described herein again in this application.

The specific connection medium between the communication interface 1402 , the processor 1401 , and the memory 1403 is not limited in the embodiments of the present application. In this embodiment of the present application, the memory 1403, the processor 1401, and the communication interface 1402 are connected through a bus 1404 in FIG. 14. The bus is represented by a thick line in FIG. 14, and the connection between other components is only for schematic illustration. , is not limited. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is shown in FIG. 14, but it does not mean that there is only one bus or one type of bus.

An embodiment of the present invention further provides a computer-readable storage medium for storing computer software instructions to be executed for executing the above-mentioned processor, which includes a program to be executed for executing the above-mentioned processor.

Embodiments of the present invention also provide a computer program product, including a computer program for executing the above-mentioned processor.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

A channel feedback method, characterized in that the method comprises:

The first device receives indication information from the third device, where the indication information is used to indicate a reporting method, and the reporting method is to perform reporting according to at least one of the following information: the quantization information of the superposition coefficient of the first device needs to be The reported bits, the number of bits to be reported in the quantization information of the superposition coefficient of the first device, wherein the superposition coefficient of the first device is used to jointly represent the channel state of the first device with the corresponding base information ;

The first device performs channel state feedback to the third device based on the indication information.
The method of claim 1, wherein the first device corresponds to at least one superposition coefficient;

The indication information is further used to indicate a superposition coefficient to be reported in the at least one superposition coefficient in the reporting manner.
The method according to claim 2, wherein the first device performs channel state feedback to the third device based on the indication information, comprising:

The first device sends channel state feedback information to the third device, where the channel state feedback information includes at least one item of the following information: quantization information of the first superposition coefficient, base information corresponding to the first superposition coefficient, and The information indicated by the reporting method in the quantization information of the second superposition coefficient, the second superposition coefficient is the superposition coefficient indicated by the indication information, and the first superposition coefficient is the at least one superposition coefficient divided by the indication The stacking factor indicated by the information.
The method according to any one of claims 1-3, wherein the bits that need to be reported in the quantization information of the superposition coefficient of the first device are: phase in the quantization information of the superposition coefficient of the first device Compared with the bits of the quantization information of the superposition coefficients of the second device, the superposition coefficients of the first device and the superposition coefficients of the second device correspond to the same base information.
The method according to any one of claims 1-4, wherein the quantization information of the superposition coefficient of the first device comprises at least one item of the following information: at least one bit for indicating phase, at least one bit for indicating amplitude at least one bit of .
A communication method, characterized in that the method comprises:

The third device generates indication information, where the indication information is used to indicate a reporting method, and the reporting method is reporting according to at least one of the following information: bits to be reported in the quantization information of the superposition coefficient of the first device, the The number of bits to be reported in the quantization information of the superposition coefficient of the first device, wherein the superposition coefficient of the first device is used to jointly represent the channel state of the first device with the corresponding base information;

The third device sends the indication information to the first device.
The method of claim 6, wherein the first device corresponds to at least one superposition coefficient;

The indication information is further used to indicate a superposition coefficient to be reported in the at least one superposition coefficient in the reporting manner.
The method according to claim 7, wherein after the third device sends the indication information to the first device, the method further comprises:

The third device receives channel state feedback information from the first device, where the channel state feedback information includes at least one of the following information: quantization information of the first superposition coefficient, and base information corresponding to the first superposition coefficient and the information indicated by the reporting method in the quantization information of the second superposition coefficient, the second superposition coefficient is the superposition coefficient indicated by the indication information, and the first superposition coefficient is the division of the at least one superposition coefficient by the Indicates the superposition coefficient indicated by the information.
The method according to any one of claims 6-8, wherein the quantization information of the superposition coefficients of the first device includes at least one item of the following information: at least one bit for indicating phase, at least one bit for indicating amplitude at least one bit of .
The method according to any one of claims 6-9, wherein before the third device generates the indication information, the method further comprises:

The third device determines that the substrate information used by the first device is the same as at least one of the substrate information used by the second device.
The method of claim 10, wherein the third device generates the indication information, comprising:

The third device determines at least one item of the following bit information: bits in the quantization information of the superposition coefficients of the first device that have different values than the quantization information of the superposition coefficients of the second device, the first device Compared with the quantization information of the superposition coefficient of the second device, the quantization information of the superposition coefficient takes the same bits, and the superposition coefficient of the first device corresponds to the superposition coefficient of the second device. the same base information;

The third apparatus generates the indication information according to the determined bit information.
The method according to claim 10 or 11, wherein the third device determines that the substrate information used by the first device is the same as at least one of the substrate information used by the second device, comprising:

The third device determines, based on the uplink channel characteristics of the first device and the uplink channel characteristics of the second device, that the base information used by the first device is the same as at least one base information in the base information used by the second device;

Alternatively, the third device determines, based on the channel measurement results historically reported by the first device and the channel measurement results historically reported by the second device, at least one of the base information used by the first device and the base information used by the second device. A base information is the same.
A channel feedback method, characterized in that the method comprises:

The first device receives second channel state information from the second device, the second channel state information includes at least one superposition coefficient of the second device, wherein any superposition coefficient in the second channel state information is used to characterize the channel state of the second device together with the corresponding base information;

The first device performs channel state feedback to the third device based on the second channel state information and the first channel state information, where the first channel state information includes at least one superposition coefficient of the first device, and the first channel state information includes at least one superposition coefficient of the first device. Any superposition coefficient in the channel state information is used to jointly characterize and determine the channel state of the first device together with the corresponding base information.
The method of claim 13, wherein the first device performs channel state feedback to the third device based on the second channel state information and the first channel state information, comprising:

The first device sends all bits of the quantization information of the superposition coefficients included in the first channel state information, all bits of the quantization information of the first superposition coefficients in the second channel state information, and all the bits of the quantization information of the first superposition coefficients in the second channel state information to the third device. part of bits in the quantization information of the second superposition coefficient in the second channel state information.
The method of claim 14, wherein the first superposition coefficient is different from the base information corresponding to any superposition coefficient in the first channel state information;

The second superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the first channel state information;

The partial bits are bits in the quantization information of the second superposition coefficient that have different values than the quantization information of the superposition coefficient in the first channel state information, and the second superposition coefficient is the same as the first channel state information. The superposition coefficients compared in the state information correspond to the same base information.
The method of claim 13, wherein the first device performs channel state feedback to the third device based on the second channel state information and the first channel state information, comprising:

The first device sends all the bits of the quantization information of the superposition coefficients included in the second channel state information, all the bits of the quantization information of the third superposition coefficients in the first channel state information, and all the bits of the quantization information of the third superposition coefficients in the first channel state information to the third device. part of the bits in the quantization information of the fourth superposition coefficient in the first channel state information.
The method of claim 16, wherein the third superposition coefficient is different from the base information corresponding to any superposition coefficient in the second channel state information;

The fourth superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the second channel state information;

The partial bits are bits in the quantization information of the fourth superposition coefficient that have different values than the quantization information of the superposition coefficient in the second channel state information, and the fourth superposition coefficient is different from the second channel state information. The superposition coefficients compared in the state information correspond to the same base information.
The method of claim 13, wherein the first device performs channel state feedback to the third device based on the second channel state information and the first channel state information, comprising:

sending, by the first device, all bits of the quantization information of the superposition coefficients included in the first channel state information to the third device;

After the first device receives the second channel state information from the second device, the method further includes:

The first apparatus sends first information to the second apparatus, where the first information is used to indicate some bits in the quantization information of the second superposition coefficient included in the second channel state information.
The method of claim 18, wherein the second superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the first channel state information;

The partial bits are bits in the quantization information of the second superposition coefficient that have different values than the quantization information of the superposition coefficient in the first channel state information, and the second superposition coefficient is different from the first superposition coefficient. The superposition coefficients compared in the channel state information correspond to the same base information.
The method of claim 13, wherein the first device performs channel state feedback to the third device based on the second channel state information and the first channel state information, comprising:

The first apparatus sends, to the third apparatus, all bits of the quantization information of the superposition coefficients included in the first channel state information and some bits of the quantization information of the second superposition coefficients included in the second channel state information .
The method of claim 20, wherein the second superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the first channel state information;

The partial bits are the bits of the quantization information of the second superposition coefficient that have different values than the bits of the quantization information of the superposition coefficient in the first channel state information, and the second superposition coefficient is the same as that of the first channel state information. The superposition coefficients compared in the first channel state information correspond to the same base information.
The method according to any one of claims 18-21, wherein the method further comprises:

The first device sends second information to the second device, where the second information is used to indicate the first superposition coefficient included in the second channel state information.
The method of claim 22, wherein the first superposition coefficient is different from base information corresponding to any superposition coefficient in the first channel state information.
The method according to any one of claims 14-23, wherein the quantization information of the superposition coefficients included in the first channel state information includes at least one item of the following information: at least one bit for indicating a phase, a at least one bit indicating the magnitude;

The quantization information of the superposition coefficient included in the second channel state information includes at least one item of the following information: at least one bit for indicating a phase, and at least one bit for indicating an amplitude.
The method according to any one of claims 13-24, wherein the second channel state information further includes basis information corresponding to at least one superposition coefficient of the second device respectively.
The method according to any one of claims 13-25, wherein the first channel state information further includes basis information corresponding to at least one superposition coefficient of the first device respectively.
A channel feedback device, characterized in that the device comprises:

A transceiver unit, configured to receive indication information from a third device, where the indication information is used to indicate a reporting method, and the reporting method is to report according to at least one of the following information: the quantization information of the superposition coefficient of the first device requires The reported bits, the number of bits to be reported in the quantization information of the superposition coefficient of the first device, wherein the superposition coefficient of the first device is used to jointly represent the channel state of the first device with the corresponding base information ;

and a processing unit, configured to perform channel state feedback to the third apparatus based on the indication information.
The device of claim 27, wherein the first device corresponds to at least one superposition coefficient;

The indication information is further used to indicate a superposition coefficient to be reported in the at least one superposition coefficient in the reporting manner.
The apparatus of claim 28, wherein the processing unit is specifically configured to:

Send channel state feedback information to the third device through the transceiver unit, where the channel state feedback information includes at least one item of the following information: quantization information of the first superposition coefficient, base information corresponding to the first superposition coefficient, and The information indicated by the reporting method in the quantization information of the second superposition coefficient, the second superposition coefficient is the superposition coefficient indicated by the indication information, and the first superposition coefficient is the at least one superposition coefficient divided by the indication The stacking factor indicated by the information.
The device according to any one of claims 27 to 29, wherein the bits to be reported in the quantization information of the superposition coefficients of the first device are: a phase in the quantization information of the superposition coefficients of the first device Compared with the bits of the quantization information of the superposition coefficient of the second device, the superposition coefficient of the first device corresponds to the same basis information as the superposition coefficient of the row of the second device.
The apparatus according to any one of claims 27-30, wherein the quantization information of the superposition coefficient of the first apparatus includes at least one of the following pieces of information: at least one bit used to indicate phase, and at least one bit used to indicate amplitude at least one bit of .
The apparatus according to any one of claims 27-31, wherein the apparatus is a terminal device, the transceiver unit is a transceiver, and the processing unit is a processor.
A communication device, characterized in that the device comprises:

a processing unit, configured to generate indication information, where the indication information is used to indicate a reporting method, and the reporting method is to perform reporting according to at least one of the following information: bits to be reported in the quantization information of the superposition coefficient of the first device, The number of bits to be reported in the quantization information of the superposition coefficient of the first device, wherein the superposition coefficient of the first device is used to jointly represent the channel state of the first device with the corresponding base information;

A transceiver unit, configured to send the indication information to the first device.
The device of claim 33, wherein the first device corresponds to at least one superposition coefficient;

The indication information is further used to indicate a superposition coefficient to be reported in the at least one superposition coefficient in the reporting manner.
The apparatus of claim 34, wherein the processing unit is further configured to:

After sending the indication information to the first device, receive channel state feedback information from the first device, where the channel state feedback information includes at least one of the following information: quantization information of the first superposition coefficient, The base information corresponding to the first superposition coefficient and the information indicated by the reporting method in the quantization information of the second superposition coefficient, the second superposition coefficient is the superposition coefficient indicated by the indication information, and the first superposition coefficient is the The at least one superposition coefficient is divided by the superposition coefficient indicated by the indication information.
The apparatus according to any one of claims 33 to 35, wherein the quantization information of the superposition coefficient of the first apparatus includes at least one of the following pieces of information: at least one bit for indicating a phase, at least one bit for indicating an amplitude at least one bit of .
The device according to any one of claims 33-36, wherein the processing unit is further configured to:

Before generating the indication information, it is determined that the substrate information used by the first device is the same as at least one of the substrate information used by the second device.
The apparatus according to claim 37, wherein, when the processing unit generates the indication information, it is specifically configured to:

Determine at least one item of the following bit information: bits in the quantization information of the superposition coefficients of the first device that have different values than the quantization information of the superposition coefficients of the second device, quantization of the superposition coefficients of the first device Compared with the quantization information of the superposition coefficient of the second device in the information, the bits of the same value are taken, and the superposition coefficient of the first device and the superposition coefficient of the second device to be compared correspond to the same base information;

The indication information is generated according to the determined bit information.
The device according to claim 37 or 38, wherein the processing unit, when determining that at least one of the base information used by the first device and the base information used by the second device is the same, is specifically configured to:

Based on the uplink channel characteristics of the first device and the uplink channel characteristics of the second device, it is determined that the base information used by the first device is the same as at least one base information in the base information used by the second device;

Alternatively, based on the channel measurement results historically reported by the first device and the channel measurement results historically reported by the second device, it is determined that the base information used by the first device is the same as at least one of the base information used by the second device.
The apparatus according to any one of claims 33-39, wherein the apparatus is a network device, the transceiver unit is a transceiver, and the processing unit is a processor.
A channel feedback device, characterized in that the device comprises:

A transceiver unit, configured to receive second channel state information from a second device, the second channel state information includes at least one superposition coefficient of the second device, wherein any superposition of the second channel state information The coefficients are used to represent the channel state of the second device together with the corresponding base information;

a processing unit, configured to perform channel state feedback to a third device based on the second channel state information and the first channel state information, where the first channel state information includes at least one superposition coefficient of the first device, the first channel state information Any superposition coefficient in the channel state information is used to jointly characterize and determine the channel state of the first device together with the corresponding base information.
The apparatus of claim 41, wherein the processing unit is specifically configured to:

Send all bits of the quantization information of the superposition coefficients included in the first channel state information, all bits of the quantization information of the first superposition coefficients in the second channel state information, and all the bits of the quantization information of the first superposition coefficients in the second channel state information to the third device through the transceiver unit part of bits in the quantization information of the second superposition coefficient in the second channel state information.
The apparatus of claim 41, wherein the first superposition coefficient is different from the base information corresponding to any superposition coefficient in the first channel state information;

The second superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the first channel state information;

The partial bits are bits in the quantization information of the second superposition coefficient that have different values than the quantization information of the superposition coefficient in the first channel state information, and the second superposition coefficient is the same as the first channel state information. The superposition coefficients compared in the state information correspond to the same base information.
The apparatus of claim 41, wherein the processing unit is specifically configured to:

All bits of the quantization information of the superposition coefficient included in the second channel state information, all bits of the quantization information of the third superposition coefficient in the first channel state information, and the part of the bits in the quantization information of the fourth superposition coefficient in the first channel state information.
The apparatus of claim 44, wherein the third superposition coefficient is different from the base information corresponding to any superposition coefficient in the second channel state information;

The fourth superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the second channel state information;

The partial bits are bits in the quantization information of the fourth superposition coefficient that have different values than the quantization information of the superposition coefficient in the second channel state information, and the fourth superposition coefficient is different from the second channel state information. The superposition coefficients compared in the state information correspond to the same base information.
The apparatus of claim 41, wherein the processing unit is specifically configured to:

Send all bits of the quantization information of the superposition coefficients included in the first channel state information to the third device by the transceiver unit;

The transceiver unit is also used for:

After receiving the second channel state information from the second device, send first information to the second device, where the first information is used to indicate a part of the quantization information of the second superposition coefficient included in the second channel state information bits.
The apparatus of claim 46, wherein the second superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the first channel state information;

The partial bits are bits in the quantization information of the second superposition coefficient that have different values than the quantization information of the superposition coefficient in the first channel state information, and the second superposition coefficient is different from the first superposition coefficient. The superposition coefficients compared in the channel state information correspond to the same base information.
The apparatus of claim 41, wherein the processing unit is specifically configured to:

Send all bits of the quantization information of the superposition coefficients included in the first channel state information and some bits of the quantization information of the second superposition coefficients included in the second channel state information to the third device through the transceiving unit .
The apparatus of claim 48, wherein the second superposition coefficient is the same as the base information corresponding to at least one superposition coefficient in the first channel state information;

The partial bits are the bits of the quantization information of the second superposition coefficient that have different values than the bits of the quantization information of the superposition coefficient in the first channel state information, and the second superposition coefficient is the same as that of the first channel state information. The superposition coefficients compared in the first channel state information correspond to the same base information.
The device according to any one of claims 46-49, wherein the transceiver unit is further configured to:

Send second information to the second device, where the second information is used to indicate the first superposition coefficient included in the second channel state information.
The apparatus of claim 50, wherein the first superposition coefficient is different from base information corresponding to any superposition coefficient in the first channel state information.
The apparatus according to any one of claims 42-51, wherein the quantization information of the superposition coefficients included in the first channel state information includes at least one of the following pieces of information: at least one bit for indicating a phase, a at least one bit indicating the magnitude;

The quantization information of the superposition coefficient included in the second channel state information includes at least one item of the following information: at least one bit for indicating a phase, and at least one bit for indicating an amplitude.
The apparatus according to any one of claims 41-52, wherein the second channel state information further includes base information corresponding to at least one superposition coefficient of the second apparatus respectively.
The apparatus according to any one of claims 41-53, wherein the first channel state information further includes base information corresponding to at least one superposition coefficient of the first apparatus.
The apparatus according to any one of claims 41-54, wherein the apparatus is a terminal device, the transceiver unit is a transceiver, and the processing unit is a processor.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores a program or an instruction, and the program or the instruction can realize claim 1 when read and executed by one or more processors The method of any one of claims 6 to 5, or the program or the instructions, when read and executed by one or more processors, can implement the method of any one of claims 6 to 12, or the program Or the instructions, when read and executed by one or more processors, may implement the method of any one of claims 13 to 26.
A communication device, characterized in that the communication device comprises a processor and a communication interface, the communication interface is used to receive computer program codes or instructions and transmit them to the processor; the processor runs the computer program code or instructions to perform a method as claimed in any one of claims 1 to 5, or the processor executes the computer program code or instructions to perform a method as claimed in any one of claims 6 to 12, or , the processor executes the computer program code or instructions to perform the method of any one of claims 13 to 26.
The device of claim 57, wherein the communication device is a chip or a chip system.