WO2020238682A1 - Method and apparatus for channel information acquisition - Google Patents

Abstract

Disclosed by embodiments of the present application are a channel information acquisition method and apparatus so as to acquire channel information between a terminal and a network device. The method comprises: a network device acquiring channel information of N first channels, the first channels being uplink channels between a first antenna port of a terminal device and an n-th antenna port of the network device, wherein n=1, 2,...N, and N is the number of antenna ports of the network device; the network device receiving Q items of discrepancy information sent by the terminal device, each item of discrepancy information among the Q items of discrepancy information being used to indicate discrepancy information between channel information of a second channel and channel information of the first channel, the second channel being an uplink channel between a second antenna port of the terminal device and the n-th antenna port of the network device, and Q being a positive integer; and the network device determining uplink channel information between the terminal device and the network device according to the channel information of the N first channels and the Q items of discrepancy information.

Description

Method and device for acquiring channel information

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office on May 31, 2019, the application number is 201910472684.8, and the application name is "a method and device for acquiring channel information", the entire content of which is incorporated herein by reference Applying.

Technical field

This application relates to the field of communication technology, and in particular to a method and device for acquiring channel information.

Background technique

In a mobile communication system, a network device needs to obtain channel information between a terminal device and the network device, and schedule resources for uplink/downlink data transmission based on the obtained channel information. Among them, channel information can be divided into uplink channel information and downlink channel information. In a time division duplexing (TDD) system, uplink channel information and downlink channel information can be obtained by measuring sounding reference signals (SRS). For example, a terminal device can communicate to the network through all its antenna ports. The device sends SRS, and the network device receives the SRS through all its antenna ports, and measures the uplink channel information and downlink channel information between each antenna port of the network device and each antenna port of the terminal device.

As shown in Figure 1, assuming that the number of antenna ports of the network equipment and the terminal equipment are both 2, then the channel between the network equipment and the terminal equipment is a 2X2 matrix, including the uplink channel matrix H _UL and downlink as shown in the following formula 1. The channel matrix H _DL . The terminal device can send SRS to the network device on the antenna port 1 and antenna port 2 of the terminal, and the network device can receive the SRS on the antenna port 1 and antenna port 2, and obtain H11, H12, H21, H22 according to the received SRS measurement, and then Obtain uplink channel information and downlink channel information according to H11, H12, H21, and H22.

However, in actual communication, due to the limited capability of the terminal device, the terminal device cannot use all the antenna ports to send the SRS to the network device, but only uses a single antenna port to send the SRS. As shown in Figure 1, the terminal device only uses the terminal device's antenna port 1 to send SRS to the network device. After the network device receives the SRS on the network device's antenna 1 and antenna 2, it can only obtain H11 and H11 according to the received SRS measurement. H21, that is, partial channel information is obtained, and complete channel information cannot be obtained by measuring SRS. Based on partial channel information, network equipment cannot perform efficient uplink and downlink resource scheduling, resulting in a decrease in uplink and downlink data transmission performance.

Summary of the invention

The embodiments of the present application provide a method and device for acquiring channel information to solve the problem that the existing terminal equipment cannot transmit SRS through all antennas, which causes the network equipment to be unable to acquire complete channel information.

In order to achieve the foregoing objectives, the following technical solutions are adopted in the embodiments of this application:

In the first aspect, an embodiment of the present application provides a method for acquiring channel information. The method includes: a network device acquires channel information of N first channels; the network device receives Q pieces of difference information sent by a terminal device, according to the N first channels Channel information and Q difference information to determine the uplink channel information between the terminal device and the network device; each difference information in the Q difference information is used to indicate the difference information between the channel information of the second channel and the channel information of the first channel , The first channel is the uplink channel between the first antenna port of the terminal device and the nth antenna port of the network device; n=1, 2,...N, N is the number of antenna ports of the network device, and the second channel is the terminal device The uplink channel between the second antenna port of the network device and the nth antenna port of the network device.

Based on the method described in the first aspect, the network device can obtain the channel information of the channel between the antenna port and one antenna port of the terminal device and the difference information from the terminal device. The difference information is the other antenna ports of the terminal device and the network The difference information between the channel information of the channel between the antenna ports of the device and the channel information that the network device has acquired, and the channel information of all channels between the network device and the terminal device is obtained according to the channel information and difference information of the acquired partial channels. In this way, the network device can obtain complete channel information, and then transmit data according to the complete channel information, thereby improving data transmission performance. At the same time, in the method provided in the first aspect, the terminal device only needs to report the channel information between the channel information. Difference information, reducing the overhead of terminal equipment reporting measurement results and signaling overhead.

In a possible design, Q is a positive integer less than or equal to (M-1)*N, and M is the number of antenna ports of the terminal device.

In a possible design, in combination with the first aspect, the difference information includes at least one of the following information: channel amplitude difference information, channel energy difference information, channel phase difference information, or channel delay difference information. Based on this possible design, the difference between the first channel and the second channel can be reflected from one or more aspects such as the amplitude of the channel, the energy of the channel, the phase of the channel, and the delay, which is simple and easy to implement.

In a possible design, in combination with the first aspect or the possible design of the first aspect, the first channel includes K first channel components, and the second channel includes K corresponding second channel components, and K is a positive integer; difference; The information includes indication information of K pieces of component difference information, and each component difference information of the K pieces of component difference information includes: difference information between channel information of a first channel component and channel information of a corresponding second channel component.

The indication information of K pieces of component difference information includes K pieces of component difference information or indication information obtained according to K pieces of component difference information, which is not limited.

Based on this possible design, when the channel includes multiple channel components, the difference between the channel information of the channel is determined according to the difference between the channel information of the multiple channel components of the channel, that is, the channel information of the channel is determined with the channel component as the granularity. Improve the accuracy of determining the difference information.

In yet another possible design, in combination with the first aspect or the possible design of the first aspect, the difference information includes: difference information of the channel at one or more frequency points. Based on this possible design, the difference between the channels is determined according to the difference of the channel at one or more frequency points, that is, the difference between the channels is determined with the granularity of the frequency point, and the determination accuracy of the difference information is improved.

In another possible design, in combination with the first aspect or the possible design of the first aspect, the Q pieces of difference information include: first difference information and second difference information; the first difference information is used to indicate the first and second channels The difference information between the channel information and the first channel; the second difference information is used to indicate the difference information of the channel information between the first second channel and the second second channel. Based on this possible design, the difference information can be reported in a differential manner, which reduces the reporting overhead.

In yet another possible design, in combination with the first aspect or the possible design of the first aspect, the network device obtains channel information of each first channel in the N first channels, including: the network device passes through the nth antenna of the network device The port receives the SRS sent by the terminal device through the first antenna port; the network device obtains channel information of the channel between the first antenna port of the terminal device and the nth antenna port of the network device according to the received SRS. Based on this possible design, the channel information of the channel can be obtained according to the SRS measurement, which is simple and easy.

In yet another possible design, in combination with the first aspect or the possible design of the first aspect, the network device sends instruction information to the terminal device; where the instruction information is used to instruct the terminal device to report Q pieces of difference information. Based on this possible design, the network device sends instruction information to the terminal device to instruct the terminal device to report the difference information between channel information, which is simple and easy.

In the second aspect, the present application provides a communication device. The communication device may be a network device or a chip or a system on a chip in a network device, and may also be a network device used to implement the first aspect or any possible aspect of the first aspect. Design the functional modules of the described method. The communication device can implement the functions performed by the network equipment in the above aspects or various possible designs, and the functions can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the aforementioned functions. For example, the communication device may include: a receiving unit, a processing unit, and a sending unit;

The processing unit is used to obtain channel information of N first channels; the first channel is the uplink channel between the first antenna port of the terminal device and the nth antenna port of the network device; n=1, 2,...N, N is The number of antenna ports of network equipment;

The receiving unit is configured to receive Q pieces of difference information sent by the terminal device; wherein each piece of difference information in the Q pieces of difference information is used to indicate difference information between channel information of the second channel and channel information of the first channel, and the second channel is : The uplink channel between the second antenna port of the terminal device and the nth antenna port of the network device; Q is a positive integer;

The processing unit is further configured to determine the uplink channel information between the terminal equipment and the network equipment according to the channel information of the N first channels and the Q difference information.

The specific implementation of the communication device can refer to the behavior and function of the network device in the channel information acquisition method provided by the first aspect or any possible design of the first aspect. The design method can be implemented by the receiving unit, the processing unit, and the sending unit included in the communication device, which will not be repeated here. Therefore, the provided communication device can achieve the same beneficial effects as the first aspect or any possible design of the first aspect.

In a third aspect, a communication device is provided. The communication device may be a network device or a chip or a system on a chip in the network device. The communication device can implement the functions performed by the network equipment in the above-mentioned aspects or various possible designs. The functions can be implemented by hardware. For example, in a possible design, the communication device may include: a processor and a transceiver, The processor is used to obtain channel information of the N first channels; the first channel is the uplink channel between the first antenna port of the terminal device and the nth antenna port of the network device; n=1, 2,...N, N is the network device The number of antenna ports; and receive Q difference information sent by the terminal device through the transceiver, and determine the uplink channel information between the terminal device and the network device according to the channel information of the N first channels and the Q difference information; where, Each of the Q difference information is used to indicate the difference information between the channel information of the second channel and the channel information of the first channel. The second channel is: between the second antenna port of the terminal device and the nth antenna port of the network device The uplink channel; Q is a positive integer. The transceiver may be an input/output interface, pin or circuit on the chip, for example.

In another possible design, the communication device may further include a memory, and the memory is configured to store necessary computer-executed instructions and data of the communication device. When the communication device is running, the processor executes the computer-executable instructions stored in the memory, so that the communication device executes the channel information acquisition method as described in the first aspect or any possible design of the first aspect.

In a fourth aspect, a computer-readable storage medium is provided. The computer-readable storage medium may be a readable non-volatile storage medium, and the computer-readable storage medium stores instructions when it runs on a computer. , So that the computer can execute the channel information acquisition method described in the first aspect or any one of the possible designs of the foregoing aspects.

In a fifth aspect, a computer program product containing instructions is provided, which when running on a computer, enables the computer to execute the channel information acquisition method described in the first aspect or any one of the possible designs of the foregoing aspects.

In a sixth aspect, a communication device is provided. The communication device may be a network device or a chip or a system on a chip in the network device. The communication device includes one or more processors and one or more memories. The one or more memories are coupled with the one or more processors, and the one or more memories are used to store computer program codes, and the computer program codes include computer instructions. When the one or more processors When the computer instruction is executed, the communication device is caused to execute the channel information acquisition method described in the first aspect or any possible design of the first aspect.

Among them, the technical effects brought about by any one of the design methods of the third aspect to the sixth aspect can be referred to the technical effects brought about by the above-mentioned first aspect or any possible design of the first aspect, and will not be repeated.

In a seventh aspect, an embodiment of the present application provides a method for acquiring channel information. The method may include: a terminal device determines Q pieces of difference information and sends Q pieces of difference information to a network device; each of the Q pieces of difference information is used for Indicate the difference information between the channel information of the second channel and the channel information of the first channel, the first channel is the uplink channel between the first antenna port of the terminal device and the nth antenna port of the network device; n=1, 2,...N , N is the number of antenna ports of the network device; the second channel is the uplink channel between the second antenna port of the terminal device and the nth antenna port of the network device.

Based on the method described in the seventh aspect, the terminal device can determine the difference information between the channel information of the channel between the other antenna ports of the terminal device and the antenna port of the network device and the channel information that the network device has acquired, and send the determined difference information To the network device, so that the network device obtains the uplink channel information between the network device and the terminal device according to the obtained channel information and difference information of the partial channels. In this way, the network device can obtain complete channel information, and then transmit data according to the complete channel information, thereby improving data transmission performance. At the same time, in the method provided by the seventh aspect, the terminal device only needs to report the channel information of its channel. Difference information, reducing the overhead of terminal equipment reporting measurement results and signaling overhead.

In a possible design, Q is a positive integer less than or equal to (M-1)*N, and M is the number of antenna ports of the terminal device.

In a possible design, with reference to the seventh aspect, the difference information includes at least one of the following information: channel amplitude difference information, channel energy difference information, channel phase difference information, or channel delay difference information. Based on this possible design, the difference between the first channel and the second channel can be reflected from one or more aspects such as the amplitude of the channel, the energy of the channel, the phase of the channel, and the delay, which is simple and easy to implement.

In a possible design, in combination with the seventh aspect or the possible design of the seventh aspect, the first channel includes K first channel components, and the second channel includes K corresponding second channel components, and K is a positive integer; difference; The information includes indication information of K pieces of component difference information, and each component difference information of the K pieces of component difference information includes: difference information between channel information of a first channel component and channel information of a corresponding second channel component.

The indication information of K pieces of component difference information includes K pieces of component difference information or indication information obtained according to K pieces of component difference information, which is not limited.

Based on this possible design, when the channel includes multiple channel components, the difference between the channel information of the channel is determined according to the difference between the channel information of the multiple channel components of the channel, that is, the channel information of the channel is determined with the channel component as the granularity. Improve the accuracy of determining the difference information.

In another possible design, in combination with the seventh aspect or the possible design of the seventh aspect, the difference information includes: difference information of the channel at one or more frequency points. Based on this possible design, the difference between the channels is determined according to the difference of the channel at one or more frequency points, that is, the difference between the channels is determined with the granularity of the frequency point, and the determination accuracy of the difference information is improved.

In yet another possible design, in combination with the possible designs of the seventh aspect or the seventh aspect, the Q pieces of difference information include: first difference information and second difference information; the first difference information is used to indicate the first and second channels The difference information between the channel information and the first channel; the second difference information is used to indicate the difference information of the channel information between the first second channel and the second second channel. Based on this possible design, the difference information can be reported in a differential manner, which reduces the reporting overhead.

In another possible design, in combination with the seventh aspect or the possible design of the seventh aspect, the terminal device receives the instruction information sent by the network device; wherein the instruction information is used to instruct the terminal device to report Q pieces of difference information. Based on this possible design, the terminal device receives the instruction information sent by the network device, and reports the difference information under the instruction of the network device, which is simple and easy.

In an eighth aspect, the present application provides a communication device. The communication device may be a terminal device or a chip or a system on a chip in the terminal device, and may also be a terminal device for implementing any of the seventh aspect or the seventh aspect. Design the functional modules of the described method. The communication device can implement the functions performed by the terminal device in the above-mentioned aspects or various possible designs, and the functions can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions. For example, the communication device may include: a processing unit and a sending unit;

The processing unit is used to determine Q pieces of difference information; wherein, each piece of difference information in the Q pieces of difference information is used to indicate difference information between channel information of the second channel and channel information of the first channel, and the first channel is: The uplink channel between the first antenna port and the nth antenna port of the network device; n=1, 2,...N, N is the number of antenna ports of the network device; the second channel is: the second antenna port of the terminal device and the network The uplink channel between the nth antenna port of the device; Q is a positive integer less than or equal to (M-1)*N;

The sending unit is used to send Q pieces of difference information to the network device.

The specific implementation of the communication device may refer to the behavior and function of the terminal device in the channel information acquisition method provided by the seventh aspect or any one of the possible designs of the seventh aspect, and any one of the seventh aspect or the seventh aspect is possible. The design method can be implemented by the receiving unit, the processing unit, and the sending unit included in the communication device, which will not be repeated here. Therefore, the provided communication device can achieve the same beneficial effects as the seventh aspect or any possible design of the seventh aspect.

In a ninth aspect, a communication device is provided. The communication device may be a terminal device or a chip or a system on a chip in the terminal device. The communication device can implement the functions performed by the terminal device in the above-mentioned aspects or various possible designs. The functions can be implemented by hardware. For example, in a possible design, the communication device may include: a processor and a transceiver, The processor determines Q pieces of difference information, and sends Q pieces of difference information to the network device through the transceiver; where each piece of difference information in the Q pieces of difference information is used to indicate the difference between the channel information of the second channel and the channel information of the first channel Information, the first channel is: the uplink channel between the first antenna port of the terminal device and the nth antenna port of the network device; n=1, 2,...N, where N is the number of antenna ports of the network device; the second channel is : Uplink channel between the second antenna port of the terminal device and the nth antenna port of the network device; Q is a positive integer less than or equal to (M-1)*N. The transceiver may be an input/output interface, pin or circuit on the chip, for example.

In another possible design, the communication device may further include a memory, and the memory is configured to store necessary computer-executed instructions and data of the communication device. When the communication device is running, the processor executes the computer-executable instructions stored in the memory, so that the communication device executes the channel information acquisition method described in the seventh aspect or any one of the possible designs of the seventh aspect.

In a tenth aspect, a computer-readable storage medium is provided. The computer-readable storage medium may be a readable non-volatile storage medium, and the computer-readable storage medium stores instructions when it runs on a computer. , So that the computer can execute the channel information acquisition method described in the seventh aspect or any one of the possible designs of the foregoing aspects.

In an eleventh aspect, a computer program product containing instructions is provided, which when running on a computer, causes the computer to execute the seventh aspect or the channel information acquisition method described in any of the possible designs of the foregoing aspects.

In a twelfth aspect, a communication device is provided. The communication device may be a terminal device or a chip or a system on a chip in the terminal device. The communication device includes one or more processors and one or more memories. The one or more memories are coupled with the one or more processors, and the one or more memories are used to store computer program codes, and the computer program codes include computer instructions. When the one or more processors When the computer instruction is executed, the communication device is caused to execute the channel information acquisition method according to the seventh aspect or any possible design of the seventh aspect.

Among them, the technical effect brought by any one of the ninth aspect to the twelfth aspect can be referred to the technical effect brought about by any possible design of the seventh aspect or the seventh aspect, and will not be repeated here.

In a thirteenth aspect, an embodiment of the present application provides a channel information acquisition system, which may include the network device described in any one of the second aspect to the sixth aspect, and any one of the eighth aspect to the twelfth aspect The terminal equipment.

Description of the drawings

Figure 1 is a schematic diagram of the principle provided by an embodiment of the application;

FIG. 2 is a schematic diagram of a communication system provided by an embodiment of this application;

3 is a schematic diagram of the composition of a communication device provided by an embodiment of the application;

FIG. 4 is a flowchart of a method for acquiring channel information according to an embodiment of the application;

FIG. 5 is a schematic diagram of a channel component provided by an embodiment of the application;

FIG. 6 is a schematic structural diagram of a communication device 60 provided by an embodiment of this application;

FIG. 7 is a schematic structural diagram of a communication device 70 provided by an embodiment of this application;

FIG. 8 is a schematic structural diagram of a channel information acquisition system provided by an embodiment of this application.

Detailed ways

The method provided in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the specification:

The channel information acquisition method provided by the embodiments of this application may be applicable to cellular communication systems, long term evolution (LTE) systems, fifth generation (5G) mobile communication systems, and new radio (NG) systems Or other mobile communication systems, no restrictions. The following only takes the communication system shown in FIG. 2 as an example to describe the method provided in the embodiment of the present application.

FIG. 2 is a schematic diagram of the architecture of a communication system provided by an embodiment of the application. As shown in FIG. 2, the communication system may include: an access network device and multiple terminal devices. As shown in Figure 2, a single network device can transmit data or control signaling to a single or multiple terminal devices, and multiple network devices can also simultaneously transmit data or control signaling to a single terminal device.

Among them, the terminal equipment in Figure 2 can be called terminal equipment (terminal equipment) or user equipment (user equipment, UE) or mobile station (mobile station, MS) or mobile terminal equipment (mobile terminal, MT), etc., and can be deployed On the water (such as ships, etc.); can also be deployed in the air (such as airplanes, balloons and satellites, etc.). Specifically, the terminal device in FIG. 2 may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function. Terminal equipment can also be virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment, wireless terminal equipment in industrial control, wireless terminal equipment in unmanned driving, and wireless terminal in telemedicine Equipment, wireless terminal equipment in smart grid, wireless terminal equipment in smart city, wireless terminal equipment in smart home, etc. In the embodiments of the present application, the device used to implement the function of the terminal device may be a terminal device, or a device capable of supporting the terminal device to implement the function, such as a chip system. In the technical solutions provided by the embodiments of the present application, the device for implementing the functions of the terminal device is a terminal device as an example to describe the technical solutions provided by the embodiments of the present application.

The network equipment in Figure 2 is mainly used to implement functions such as wireless physical control functions, resource scheduling and wireless resource management, wireless access control, and mobility management. Specifically, the network device may be an access network (AN)/radio access network (RAN) device, or a device composed of multiple 5G-AN/5G-RAN nodes, and It can be a base station (nodeB, NB), an evolved base station (evolution nodeB, eNB), a next-generation base station (generation nodeB, gNB), a transmission receiving point (TRP), a transmission point (TP), and some Any of the other access nodes. In the embodiments of the present application, the device used to implement the function of the network device may be a network device, or a device capable of supporting the network device to implement the function, such as a chip system, which is not limited.

In the system shown in Figure 2, the network device may have N antenna ports, and the terminal device may have M antenna ports, where N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1; or, N is greater than or An integer equal to 1, and M is an integer greater than or equal to 2. Network equipment and terminal equipment can communicate with each other through N*M channels. In order to obtain channel information of N*M channels, the network equipment obtains the channel information between a single antenna port of the terminal equipment and all antenna ports of the network equipment by measuring SRS, that is, obtains channel information of 1*N channels, and then, the terminal The device calculates the difference information between the channel information of the channel corresponding to the other antenna port of the terminal device and the channel corresponding to the antenna port that sends the SRS, and feeds back the difference information to the network device. Finally, the network equipment calculates the channel information of the N*M channels through the channel information of the 1*N channels and the difference information fed back by the terminal equipment. The terminal device can calculate the channel information of the channel corresponding to the other antenna ports of the terminal device according to the measurement configuration information (such as: channel status information reference signal (CSI-RS)). Specifically, the implementation process may refer to the description in the embodiment corresponding to FIG. 4.

It should be noted that FIG. 2 is only an exemplary drawing, and the number of devices included in FIG. 2 is not limited, and in addition to the devices shown in FIG. 2, the communication architecture may also include other devices, such as: core Network equipment, data network, etc. In addition, the name of each device in FIG. 2 is not limited. In addition to the name shown in FIG. 2, each device can also be named with other names without limitation.

In specific implementation, each device shown in FIG. 2 has the components shown in FIG. 3. FIG. 3 is a schematic diagram of the composition of a communication device provided by an embodiment of the application. The communication device may be a network device or a chip or a system on a chip inside the network device. As shown in FIG. 3, the communication device 300 includes at least one processor 301, a communication line 302, and at least one transceiver 303; further, the communication device shown in FIG. 3 may also include a memory 304. Among them, the processor 301, the memory 304, and the transceiver 303 may be connected through a communication line 302. In the embodiments of the present application, at least one may be one, two, three, or more, which is not limited in the embodiments of the present application.

The processor 301 can be a central processing unit (CPU), a general-purpose processor network processor (NP), a digital signal processing (DSP), a microprocessor, a microcontroller, Programmable logic device (PLD) or any combination of them. The processor may also be any other device with processing functions, such as a circuit, a device, or a software module.

The communication line 302 is used to transmit information between components included in the communication device.

The transceiver 303 is used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.). As shown in FIG. 3, the transceiver 303 may include a transmitter 3031, a receiver 3032, and an antenna port 3033. The receiver 3032 may be used to receive data or information through the antenna port 3033, and the transmitter 3031 may be used to send data or information to the terminal device through the antenna port 3033. It should be noted that the name of the antenna port is not limited, and the antenna port can also be called an antenna.

The memory 304 can be a read-only memory (ROM) or other types of static storage devices that can store static information and/or instructions, or can be a random access memory (RAM) or can store Other types of dynamic storage devices for information and/or instructions can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory, CD-ROM ) Or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store instructions or data structure forms The desired program code and any other medium that can be accessed by the computer, but not limited to this.

The memory 304 may exist independently of the processor 301, is connected to the processor 301 through a communication line 302, or may be integrated with the processor 301. The memory 304 may be used to store instructions or program codes. When the processor 301 calls and executes the instructions or program codes stored in the memory 304, it can implement the channel information acquisition method provided in the following embodiments of the present application.

As an implementable manner, the processor 301 includes one or more CPUs, such as CPU0 and CPU1 in FIG. 3. As another achievable manner, the communication device 300 may include multiple processors, such as the processor 301 and the processor 307 in FIG. 3.

As yet another achievable manner, the communication device 300 further includes an output device 305 and an input device 306. Exemplarily, the input device 306 may be a keyboard, a mouse, a microphone, or a joystick, and the output device 305 may be a display screen, a speaker, or other devices.

It should be noted that the aforementioned communication device 300 may be a desktop computer, a portable computer, a network server, a PDA, a mobile phone, a tablet computer, a wireless terminal device, an embedded device, a chip system or a device with a similar structure in FIG. 3. The embodiment of the present application does not limit the type of the communication device 300.

In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

The method for acquiring channel information provided by the embodiment of the present application will be described below with reference to the system shown in FIG. 2. Among them, each device mentioned in the following method embodiments may have the component parts shown in FIG. 3, which will not be repeated. In addition, in the following embodiments of the present application, the names of messages exchanged between various network elements or the names of various parameters in the messages are just an example, and other names may also be used in specific implementations, which are not specifically limited in the embodiments of the present application.

FIG. 4 is a channel information acquisition method provided by an embodiment of the application, which is used to acquire channel information of all channels between a terminal device and a network device. The terminal device has M antenna ports, and the network device has N antenna ports. N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1; alternatively, N is an integer greater than or equal to 1, and M is an integer greater than or equal to 2. As shown in Figure 4, the channel information acquisition may include steps 401 to 404:

Step 401: The network device obtains channel information of N first channels.

The network device may be any network device in the system shown in FIG. 2.

The first channel is an uplink channel between the first antenna port of the terminal device and the nth antenna port of the network device, and the terminal device may be any device that communicates with the network device. n belongs to any value in [1, N], such as: n=1, 2,...N. The first antenna port can be any antenna port of the terminal device without limitation, for example, it is the antenna port 1 of the terminal device.

Exemplarily, for any first channel among the N first channels, the network device may obtain channel information of the first channel in the following manner:

The terminal device sends the SRS to the network device through the first antenna port of the terminal device; the network device receives the SRS sent by the terminal device through the nth antenna port of the network device, and obtains the first antenna port of the terminal device and the network device according to the received SRS The channel information of the uplink channel between the nth antenna ports, that is, the channel information of the first channel.

Further, the network equipment can refer to the above method to receive the SRS sent by the terminal equipment at the other N-1 antenna ports of the network equipment except the nth antenna port, and obtain other N-1 first antenna ports according to the received SRS. Channel information of the channel.

It should be noted that, in the embodiment of the present application, the process for the network device to obtain the channel information of the channel according to the received SRS can refer to the prior art, and will not be repeated.

For example, taking Figure 1 as an example, suppose a terminal device sends an SRS to a network device through antenna port 1, then the network device can receive SRS through antenna port 1, and get the antenna port 1 of the terminal device and the antenna port of the network device according to the received SRS The channel information H ₁₁ of the uplink channel between 1 and the SRS is received through the antenna port 2, and the channel information H ₂₁ of the uplink channel between the antenna port 1 of the terminal device and the antenna port 2 of the network device is obtained according to the received SRS. , And the channel information (H ₁₂ and H ₂₂ ) of the uplink channel between the antenna port 2 of the terminal device and the antenna port 1 of the network device and the antenna port 2 of the network device is still unknown, that is, the network device can obtain the formula (2 ) Shows the uplink channel information, where NA in formula (2) represents unknown uplink channel information.

Step 402: The terminal device determines Q pieces of difference information.

Wherein, each of the Q pieces of difference information can be used to indicate the difference information between the channel information of the second channel and the channel information between the first channel, and the second channel is the nth antenna port of the terminal device and the nth of the network device. For the uplink channel between antenna ports, the second antenna port is any antenna port on the terminal device except the first antenna port. For example, the first antenna port is the antenna port on the terminal device that transmits SRS, and the second antenna port is the antenna port on the terminal device that does not transmit SRS. Specifically, the second channel and the first channel may be uplink channels between two different antenna ports of the terminal device and the same antenna port of the network device. For example, taking Figure 1 as an example, the first channel can be H ₁₁ and the second channel can be H ₁₂ .

In a possible design, Q is equal to (M-1)*N, that is, the terminal device needs to determine the difference between the channel information between the antenna ports of all the antenna ports that do not transmit SRS and the antenna port of the network device and the channel information between the first channel .

In another possible design, Q is a positive integer smaller than (M-1)*N. That is, the terminal device can determine the difference information between the channel information between the part of the antenna port that does not transmit the SRS and the antenna port of the network device and the channel information between the first channel. For example: in all second channels, if there are multiple second channels, the channel characteristics of the multiple second channels are the same (or almost the same), the channel information between the multiple second channels and the first channel The difference information is also the same (or almost the same). For these multiple second channels, the terminal device may only determine one piece of difference information to represent the difference information of the channel information between the multiple second channels and the first channel. , Q can be less than (M-1)*N.

For example, suppose there are 2x3=6 channels H ₁₁ , H ₂₁ , H ₃₁ ; H ₁₂ , H ₂₂ , H ₃₂ between the terminal equipment and the network equipment, and the network equipment obtains 3 channels (H ₁₁ , H ₂₁₎ by measuring SRS , H ₃₁ ), and H ₁₂ , H ₂₂ , and H ₃₂ are unknown channel information. In a possible design, the terminal device can determine the difference information between H ₁₁ and H ₁₂ , the difference information between H ₂₂ and H ₂₁ , and the difference information between H ₃₂ and H ₃₁ . In another possible design, if it is confirmed that the difference information between H ₁₁ and H ₁₂ , the difference information between H ₂₂ and H ₂₁ , and the difference information between H ₃₂ and H ₃₁ are the same or almost the same, the terminal The device may only need to determine one piece of difference information, such as determining the difference information between H ₁₁ and H ₁₂ or the difference information between H ₂₂ and H ₂₁ or the difference information between H ₃₂ and H ₃₁ .

Exemplarily, the terminal device may determine Q pieces of difference information according to the measurement configuration information sent by the network device. Specifically, for this process, refer to the description in the first embodiment of the method shown in Figure 4 below.

Among them, in the embodiment of this application, the difference information can have multiple manifestations. For example, the difference information can be the difference information between channels, the difference information between the channel components of the channel, or the difference information between one or more channels. The difference information on the frequency point may be difference information between different second channels or difference information between equivalent channels, and so on. Specifically, refer to the descriptions in the second embodiment shown in FIG. 4 to the seventh embodiment shown in FIG. 4 below.

It should be noted that in each embodiment of the present application, * means multiplication calculation, for example: (M-1)*N means (M-1) multiplied by N. In addition, the embodiment of the present application does not limit the execution order of step 401 and step 402. As shown in FIG. 4, step 401 is performed first, and then step 402, or step 402 is performed first, and then step 401 is performed, without limitation.

Step 403: The terminal device sends Q pieces of difference information to the network device.

Exemplarily, the terminal device may send Q pieces of difference information to the network device through the physical uplink control channel (PUCCH). For example, the terminal device may carry Q pieces of difference information in the PUCCH, and send to the network device Q pieces of difference information. PUCCH of Q difference information.

Step 404: The network device receives Q pieces of difference information sent by the terminal device, and determines the uplink channel information between the terminal device and the network device according to the channel information of the N first channels and the Q pieces of difference information.

Exemplarily, the network device may obtain the channel information of the second channel according to the channel information of the first channel and the difference information of the channel information between the first channel and the second channel, and then obtain complete uplink channel information.

For example: when the difference information is the difference between the channel information between the first channel and the second channel (or the quantized bit obtained after the difference is quantized), the network device calculates the difference based on the channel information between the first channel and the second channel. The difference information is to determine the difference of the channel information between the first channel and the second channel, and calculate the sum of the channel information of the first channel and the difference to obtain the channel information of the second channel.

When the difference information is the multiple value of the channel information between the first channel and the second channel (or the quantized bit obtained after the multiple value is quantized), the network device uses the difference information of the channel information between the first channel and the second channel , Determining the multiple value of the channel information between the first channel and the second channel, and multiplying the channel information of the first channel by the multiple value to obtain the channel information of the second channel.

For example, taking Figure 1 as an example, the network equipment measures H ₁₁ and H ₂₁ through SRS, and receives the difference information between H ₁₂ and H _{11 and} the difference information between H ₂₁ and H ₂₂ fed back by the terminal equipment. ₁₁ and the difference information between H ₁₂ and H ₁₁ are calculated to obtain H ₁₂ , and the difference information between H ₂₁ and H ₂₁ and H ₂₂ is calculated to obtain H ₂₂ , thereby obtaining complete channel information of 2×2 channels.

Based on the method shown in Figure 4, the network device can obtain channel information of the channel between the antenna port and one antenna port of the terminal device, and obtain difference information from the terminal device. The difference information is the difference between the other antenna ports of the terminal device and the network device. The difference information between the channel information of the channel between the antenna ports and the channel information that the network device has acquired, and the channel information of all channels between the network device and the terminal device is obtained according to the acquired channel information and difference information of the partial channels. In this way, the network equipment can obtain complete channel information, and then transmit data according to the complete channel information, thereby improving data transmission performance. At the same time, in the method shown in Figure 4, in order to control the overhead of channel measurement, the terminal equipment does not directly The channel information of the channel is fed back to the network device, and only the difference information between the channel information of the channel is reported, which reduces the overhead for the terminal device to report the measurement result and the signaling overhead.

In the first embodiment of the method shown in FIG. 4, the terminal device determining Q pieces of difference information may include: the terminal device receives the measurement configuration information sent by the network device, and obtains the difference between the terminal device and the network device according to the received measurement configuration information. According to the channel information of all channels (all first channels and all second channels) between the channels, Q pieces of difference information are determined according to the channel information of the second channel and the channel information of the first channel.

Specifically, the terminal device may use the difference value obtained by subtracting the channel information of the second channel and the channel information of the first channel as the difference information. Alternatively, the terminal device may use a multiple value obtained by dividing the channel information of the second channel and the channel information of the first channel as the difference information. Alternatively, the terminal device may subtract the channel information of the second channel and the channel information of the first channel to obtain the difference, and quantize the difference to obtain the difference information; or, the terminal device may calculate the channel information of the second channel Dividing with the channel information of the first channel to calculate the multiplier value, and quantizing the multiplier value to obtain the difference information, which is not limited.

Among them, the measurement configuration information can be used to measure the information of all channels between the terminal device and the network device. The measurement configuration information may include, but is not limited to, measurement resource configuration information and configuration information related to measurement result reporting. The measurement resource configuration information may include information related to the resource to be measured by the terminal device. For example, the measurement resource configuration information may include the sending period of the resource, the type of the resource, and so on. The types of resources may include one or a combination of the following resources: CSI-RS resources, synchronization signal block (synchronization signal block, SSB) resources.

Among them, the information related to the measurement result reporting may include the reporting period, the reporting content (report & quantity), and so on. The reported content may include one or more of the following: resource index, antenna index, spatial path/spatial component index, frequency subband index, channel difference information, etc.

Exemplarily, the terminal device may receive measurement configuration information sent by the network device through the physical downlink control channel (PDCCH) terminal device. For example, the network device can carry the measurement configuration information in the PDCCH, and send the PDCCH carrying the measurement configuration information to the terminal device.

For example, taking Fig. 1 as an example, the terminal device can obtain complete downlink channel information H _DL (as shown in formula (3)) by measuring CSI-RS. H _DL is the transposed matrix of H _UL . According to the obtained downlink channel The information determines the difference information between H ₁₂ and H ₁₁ , and the difference information between H ₂₂ and H _21. The difference information between H ₁₂ and H ₁₁ can be (H ₁₂ minus H ₁₁ ) or H ₁₂ /H ₁₁ or H ₁₂ /H ₁₁ , the difference information between H ₂₂ and H ₂₁ can be (H ₂₂ minus H ₂₁ ) or H ₂₂ /H ₂₁ or H ₂₁ /H ₂₂ . Among them, if based on channel analysis, it is proved that the difference information between H ₁₂ and H _{11 and} the difference information between H ₂₂ and H ₂₁ are the same (or almost the same), for the terminal device, only one set of channel difference information needs to be determined For example, it is only necessary to determine the difference information between H ₁₂ and H ₁₁ or the difference information between H ₂₂ and H ₂₁ .

In the second embodiment of the method shown in FIG. 4, the channel information of the channel may include one or more kinds of information such as the amplitude, delay, phase, and energy of the channel. For example, the channel information of the first channel may include but It is not limited to one or more types of information such as the amplitude of the first channel, the phase of the first channel, the delay of the first channel, and the energy of the first channel. The channel information of the second channel may include, but is not limited to, one or more types of information such as the amplitude of the second channel, the phase of the second channel, the delay of the second channel, and the energy of the second channel.

In the case where the channel information of the channel includes one or more of the channel's amplitude, delay, phase, energy, etc., the difference information between the channel information of the second channel and the channel information between the first channel may include at least one of the following Kinds of information: channel amplitude difference information, channel energy difference information, channel phase difference information, channel delay difference information.

Wherein, the amplitude difference information of the channel may refer to the difference information between the amplitude of the second channel and the amplitude of the first channel. For example: it can be the difference between the amplitude of the second channel and the amplitude of the first channel (or the quantization bit corresponding to the difference), or the multiple (or ratio) between the amplitude of the second channel and the amplitude of the first channel , Or, the quantization bit corresponding to the multiple (or ratio) between the amplitude of the second channel and the amplitude of the first channel, etc.

The energy difference information of the channel may refer to the difference information between the energy of the second channel and the energy of the first channel. For example: it can be the difference between the energy of the second channel and the energy of the first channel (or the quantization bit corresponding to the difference), or the multiple (or ratio) between the energy of the second channel and the energy of the first channel , Or, the quantization bit corresponding to the multiple (or ratio) between the energy of the second channel and the energy of the first channel, etc.

Wherein, the phase difference information of the channel may refer to the difference information between the phase of the second channel and the phase of the first channel. For example, it can be the difference between the phase of the second channel and the phase of the first channel (or the quantization bit corresponding to the difference), or the multiple (or ratio) between the phase of the second channel and the phase of the first channel , Or, the quantization bit corresponding to the multiple (or ratio) between the phase of the second channel and the phase of the first channel, etc.

Wherein, the delay difference information of the channel may refer to the difference information between the delay of the second channel and the delay of the first channel. For example: it can be the difference between the delay of the second channel and the delay of the first channel (or the quantization bit corresponding to the difference), or the multiple value between the delay of the second channel and the delay of the first channel (Or ratio), or the quantization bit corresponding to the multiple value (or ratio) between the delay of the second channel and the delay of the first channel, etc.

For example, the terminal device includes M antenna ports: antenna port 1, antenna port 2, antenna port 3... Antenna port m, and the terminal device transmits SRS on antenna port 1, and the first channel is the terminal device’s antenna port 1 and The uplink channel between the antenna ports of the network device. The second channel is the uplink channel between the antenna port of the terminal device except antenna port 1 and the antenna port of the network device. Table 1 below shows the first channel and the second channel For the three kinds of difference information (delay difference, phase difference, and amplitude difference) between the channel information, the terminal device can determine one or more kinds of difference information among the amplitude difference, phase difference and delay difference shown in Table 1. And report to the network equipment without restriction.

Table I

In the third embodiment of the method shown in Figure 4, according to the channel theory, the channel between the network device and the terminal device is composed of one or more channel components (or called spatial path/spatial component), and the antenna of the terminal device The signal from the port reaches the antenna port of the network device through one or more channel components. The channel information of the channel between the antenna port of the terminal device and the antenna port of the network device can be regarded as the superposition of the channel information of the channel components included in the channel.

其中

分别为H ₁₁在信道分量1，信道分量2，信道分量3上的信道分量。 For example, as shown in Figure 5, assuming that each channel between the network equipment and the terminal equipment includes three channel components, then H ₁₁ , H ₁₂ , H ₂₁ and H ₂₂ are all composed of three channel components. 5 to H _11, for example, antenna network device port 1 antenna transmission to the terminal device port signal 1 through three channel component (channel component 1, channel component 2 and the channel component 3) to reach the terminal apparatus At antenna port 1, when the signal passes through each channel component, a certain amplitude and phase deformation will occur, which can be regarded as the influence of the channel component on the signal, that is, the channel characteristic of the channel component. The sum of the channel characteristics of each channel component is the channel characteristics (or channel information) of the entire channel. Therefore, the channel feature on a channel component can be regarded as a channel component, and the channel can be regarded as the superposition of the channel components corresponding to each channel component, for example

among them

These are the channel components of H ₁₁ in channel component 1, channel component 2, and channel component 3.

In the case where a channel is composed of one or more channel components (or spatial path/spatial components), the channel information of the channel is regarded as the superposition of the channel information of one or more channel components included therein. The difference information between the channel information of the second channel and the channel information of the first channel is specifically embodied in the difference between the channel information of multiple channel components included in the second channel and the channel information of multiple corresponding channel components included in the first channel.

Exemplarily, the first channel includes K first channel components, the second channel includes K corresponding second channel components, and K is a positive integer as an example; the difference between the channel information of the first channel and the information of the second channel The difference information may include indication information of K pieces of component difference information, and each component difference information of the K pieces of component difference information includes: difference information between channel information of a first channel component and channel information of a corresponding second channel component.

The indication information of the K component difference channels may include K component difference information or indication information obtained according to the K component difference information, for example, it may be an indicator indicating the K component difference information.

Specifically, the component difference information may include: component amplitude difference information, component energy difference information, component phase difference information, or component time delay difference information, etc.

Wherein, the component amplitude difference information may refer to the amplitude difference between the first channel component and the corresponding second channel component. For example, the first channel and the second channel respectively include K channel components. For the same channel component k, k=1, 2, 3...K, the same signal passes through the channel component k of the first channel and the channel component k of the second channel. When the channel component k reaches the terminal equipment, the signal amplitude may be different, that is, there is a component amplitude difference, which is the amplitude difference between the channel component k of the first channel and the channel component k of the second channel.

The component energy difference information may refer to the energy difference between the first channel component and the corresponding second channel component. For example, the first channel and the second channel respectively include K channel components. For the same channel component k, k=1, 2, 3...K, the same signal passes through the channel component k of the first channel and the channel component k of the second channel. When the channel component k reaches the terminal device, the signal energy may be different, that is, there is a component energy difference, which is the energy difference between the channel component k of the first channel and the channel component k of the second channel.

The component phase difference information may refer to the phase difference between the first channel component and the corresponding second channel component. For example, the first channel and the second channel respectively include K channel components. For the same channel component k, k=1, 2, 3...K, the same signal passes through the channel component k of the first channel and the channel component k of the second channel. When the channel component k reaches the terminal device, the signal phase may be different, that is, there is a component phase difference, which is the phase difference between the channel component k of the first channel and the channel component k of the second channel.

The component delay difference information may refer to: the delay difference between the first channel component and the corresponding second channel component. For example, the first channel and the second channel respectively include K channel components. For the same channel component k, k=1, 2, 3...K, the same signal passes through the channel component k of the first channel and the channel component k of the second channel. When the channel component k arrives at the terminal equipment, the signal delay may be different, that is, there is a component delay difference, which is the time between the channel component k of the first channel and the channel component k of the second channel. Delay.

终端设备的天线端口2与网络设备的天线端口1之间的信道H ₁₂也包括三个信道分量

信道H ₁₁与H ₁₂的差异可以具体体现为三个分量的差异：

与

之间的差异，

与

之间的差异，

与

之间的差异。具体的，可以为

与

之间的幅度差，

与

之间的幅度差，

与

之间的幅度差，

与

之 间的时延差，

与

之间的时延差，

与

之间的时延差，

与

之间的能量差，

与

之间的能量差，

与

之间的能量差，

与

之间的相位差，

与

之间的相位差，

与

之间的相位差等。 For example, as shown in FIG. 5, the channel H ₁₁ between the antenna port 1 of the terminal device and the antenna port 1 of the network device includes three channel components

The channel H ₁₂ between the antenna port 2 of the terminal device and the antenna port 1 of the network device also includes three channel components

The difference between channels H ₁₁ and H ₁₂ can be embodied in the difference of three components:

versus

difference between,

versus

difference between,

versus

difference between. Specifically, it can be

versus

The difference between

versus

The difference between

versus

The difference between

versus

The delay difference between

versus

The delay difference between

versus

The delay difference between

versus

The energy difference between

versus

The energy difference between

versus

The energy difference between

versus

The phase difference between

versus

The phase difference between

versus

The phase difference between etc.

Wherein, in the third embodiment of the method shown in FIG. 4, K may be equal to or less than the total number of channel components included in the channel. In a possible design, K is a fixed value, which can be configured by the network device to the terminal device. For example, the network device can specifically use radio resource control (RRC) signaling and medium access control- The control unit (medium access control control element, MAC CE) information or downlink control information (downlink control information, DCI) configures K to the network device.

In another possible design, K is a predefined value, for example, it can be a default value of the protocol.

In another possible design, K is not a fixed value, but is calculated by the terminal device through certain criteria. For example, it is calculated by the terminal device through the signal energy intensity corresponding to each channel component or the amplitude value of each channel component. A possible calculation criterion is: the terminal device selects the K strongest channel components whose signal energy intensity accounts for more than x% as the channel components to report the channel difference. For example, suppose the terminal device detects that there are 10 channel components in the channel, and the sum of the signal energy intensity of the first 3 channel components with the strongest signal energy accounts for more than x% of the sum of the signal energy of all channel components, the terminal device needs Report the channel difference corresponding to the strongest first 3 channel components.

As described above, for the antenna port of the terminal device, the terminal device needs to determine the difference between the channel corresponding to the antenna port and the channel corresponding to the antenna transmitting the SRS in each channel component.

The terminal device includes M antenna ports: antenna port 1, antenna port 2, antenna port 3... Antenna port m, and the terminal device transmits SRS on antenna port 1, and the first channel is the antenna port 1 of the terminal device and the network The uplink channel between the antenna ports of the device. The second channel is the uplink channel between the antenna port of the terminal device except antenna port 1 and the antenna port of the network device. Each channel includes multiple channel components as an example. Table 2 below Three kinds of difference information (delay difference, phase difference and amplitude difference) between the channel components of the first channel and the second channel are shown. As shown in Table 2, for any channel component, the terminal device can determine the information in Table 2. The displayed difference information of one or more of the amplitude difference, phase difference and delay difference is reported to the network equipment without limitation.

Table II

In the fourth embodiment of the method shown in Figure 4, the channel between the terminal device and the network device corresponds to one or more frequency points, and the channel has different channel characteristics at different frequency points. In view of this, the first channel is The difference between the channel information of the second channel may also be specifically embodied in the difference information of the channel at one or more frequency points.

Specifically, the difference information at one or more frequency points may include the amplitude difference information of the channel at one or more frequency points, the energy difference information at one or more frequency points, and the difference information at one or more frequency points. The phase difference information, the time delay difference information on one or more frequency points, etc.

Among them, a frequency point may correspond to a resource block (resource block, RB), or may correspond to multiple consecutive RBs, for example, a frequency point may correspond to a resource block group (RBG)/subband.

The terminal device includes M antenna ports: antenna port 1, antenna port 2, antenna port 3... Antenna port m, and the terminal device transmits SRS on antenna port 1, and the first channel is the antenna port 1 of the terminal device and the network The uplink channel between the antenna ports of the device. The second channel is the uplink channel between the antenna port of the terminal device except antenna port 1 and the antenna port of the network device. Each channel corresponds to frequency point 1 and frequency point 2 as an example. Table 2 below shows three kinds of difference information (delay difference, phase difference and amplitude difference) between the first channel and the second channel at frequency point 1 and frequency point 2. As shown in Table 3, for any frequency point , The terminal device can determine one or more kinds of difference information among the amplitude difference, phase difference, and delay difference shown in Table 3, and report it to the network device without limitation.

Table Three

In the fifth embodiment of the method shown in FIG. 4, it is proved that the differences between the channels corresponding to the adjacent antenna ports of the terminal equipment are the same or nearly the same. Therefore, the terminal equipment can also only determine any pair of phases of the terminal equipment. The difference information between the channels corresponding to the adjacent antenna ports, and the difference information is fed back to the network device.

In particular, when a channel includes multiple spatial paths, for any one spatial path, the difference information of the channel components on the spatial path corresponding to any adjacent antenna port is the same or nearly the same. Therefore, regardless of How many antenna ports the terminal device has, only need to feed back the difference information of the channel components on each path corresponding to the two adjacent antenna ports, instead of feeding back the channel corresponding to each antenna port and the antenna port that sends the SRS The difference information between the channel information of the channels, that is, the terminal device can only determine the difference information on the spatial path of the channel corresponding to any pair of adjacent antenna ports, and feed back the determined difference information to the network device.

和

的差异信息，与信道H ₁₂和H ₁₃在空间路径1上的分量

和

的差异信息是相同的，终端设备可以仅H ₁₁和H ₁₂在空间路径上的差异信息，并将确定的差异信息反馈给网络设备。 For example, as shown in Figure 1, the antenna port 1 of the terminal device is adjacent to the antenna port 2 of the terminal device, which are adjacent antenna ports, and the antenna port 2 of the terminal device is adjacent to the antenna port 3 of the terminal device. Are adjacent antenna ports. Taking each channel including multiple spatial paths as an example, the components of channels H ₁₁ and H ₁₂ on spatial path 1

with

Difference information, and the components of channels H ₁₂ and H ₁₃ on spatial path 1

with

The difference information is the same. The terminal device can only have the difference information between H ₁₁ and H ₁₂ on the spatial path, and feed back the determined difference information to the network device.

The terminal device includes M antenna ports: antenna port 1, antenna port 2, antenna port 3... Antenna port m, and the terminal device transmits SRS on antenna port 1, and the first channel is the antenna port 1 of the terminal device and the network The uplink channel between the antenna ports of the device. The second channel is the uplink channel between the antenna port of the terminal device except antenna port 1 and the antenna port of the network device. Each channel includes multiple spatial paths as an example. Table 4 below Three kinds of difference information (delay difference, phase difference, and amplitude difference) of the channel components of two adjacent antenna ports on each spatial path are shown. The terminal device can determine the amplitude difference, phase difference and time difference shown in Table 4. One or more types of difference information in the delay are reported to the network equipment without restriction.

Table Four

In the sixth embodiment of the method shown in FIG. 4, the Q pieces of difference information may include first difference information and second difference information; the first difference information may be used to indicate the channel between the first second channel and the first channel Information difference information; the second difference information may be used to indicate difference information of channel information between the first second channel and the second second channel.

In this way, the terminal device can first find a reference channel (such as the first second channel) from the second channel, determine the difference information of the channel information between the reference channel and the first channel, and determine the difference between the other second channels and the first channel. The difference information of the channel information between the information, and then determine the difference information between the difference information corresponding to other channels and the difference information corresponding to the reference channel, and report the determined difference information to the network device. There is no need to directly connect other second channels with The difference information between the channel information between the first channels is reported to the network device, that is, the sixth embodiment of the method shown in FIG. 4 can report the difference information in a differential manner to reduce the reporting overhead.

Wherein, in the sixth embodiment of the method shown in FIG. 4, the difference information may include one or more of amplitude difference, phase difference, time delay difference, and energy difference. Wherein, the above-mentioned first and second channels may be the second channel with the largest difference information between channel information and the first channel among all the second channels.

For example, the terminal device includes M antenna ports: antenna port 1, antenna port 2, antenna port 3... Antenna port m, and the terminal device transmits SRS on antenna port 1, and the first channel is antenna port 1 of the terminal device For the uplink channel between the antenna port of the network device and the antenna port of the network device, the second channel is the channel between the antenna port of the terminal device except antenna port 1 and the antenna port of the network device as an example. Table 5 shows the second channel and the first channel. Multiple amplitude differences, phase differences, and delay differences between channels. As shown in Table 5, the first amplitude difference (ΔA ₂₁ ) between the second channel and the first channel corresponding to antenna port 2 can be used as the reference amplitude difference, and the first amplitude difference can be quantized by y bits. For the amplitude difference between the other second channel and the first channel, such as: the amplitude difference ΔA ₃₁ between the second channel and the first channel corresponding to antenna port 3, and the amplitude between the second channel and the first channel corresponding to antenna port m For the difference ΔA _m1 , z (z<y) bits can be used to quantify the difference between the amplitude difference and the reference amplitude difference, without directly quantifying the amplitude difference. Similarly, this method can be used to determine the phase difference and time delay difference between the second channel and the first channel.

Table 5

In the seventh embodiment of the method shown in FIG. 4, the terminal device can also determine the difference information between the statistical average channel information of the two sets of channels, and report the determined difference information to the network device.

In an example, the terminal device can determine the equivalent channels between the antenna ports of the terminal device for sending SRS and all the antenna ports of the network device and the equivalent channels between the other antenna ports of the terminal device and all the antenna ports of the network device. The difference information between the channel information and the determined difference information is fed back to the network device.

Among them, the equivalent channel refers to the channel obtained by averaging all channels equivalently. Average the N channels between the antenna port of the terminal device for sending SRS and all the antenna ports of the network device to obtain an equivalent channel. For the N channels between the other antenna ports of the terminal device and all the antenna ports of the network device Get an equivalent channel by averaging, calculate the difference information between the latter and the former (such as amplitude difference, energy difference, phase difference and delay difference) and feed it back to the network equipment.

For example, taking Figure 1 as an example, the terminal device can average H ₁₁ and H _{21 to} obtain an equivalent channel H1, average H ₁₂ and H _{22 to} obtain an equivalent channel H2, and determine the difference information between H2 and H1 , And report to the network device.

In another example, the terminal device may also determine the channel information of the N first channels and the channel information of the N second channels corresponding to other antenna ports that have not sent SRS, and calculate the channel information of the N first channels and For the N difference information between the channel information of the N second channels, the N difference information is averaged to obtain the equivalent average value, and the obtained equivalent average value is reported to the network device.

For example, suppose there are 3x3=9 channels H ₁₁ , H ₂₁ , H ₃₁ , H ₁₂ , H ₂₂ , H ₃₂ , H ₁₃ , H ₂₃ , H ₃₃ between the terminal equipment and the network equipment, and the network equipment obtains by measuring SRS The channel information of 3 channels (H ₁₁ , H ₂₁ , H ₃₁ ), the terminal device can calculate the difference information between H ₁₁ and H ₁₂ , the difference information between H ₂₂ and H ₂₁ , and the difference between H ₃₂ and H ₃₁ Difference information, calculate the equivalent average value by averaging the three difference information, and report the equivalent average value to the network device. At the same time, the terminal device can also calculate the difference information between H ₁₁ and H ₁₃ , and H ₂₃ The difference information between H ₂₁ and the difference information between H ₃₃ and H ₃₁ are averaged to obtain the equivalent average value and then reported to the network device.

It should be noted that in addition to reporting the difference information, the terminal device can also report one or more of the following information to the network device: the transmission angle of multiple spatial paths, the arrival angle of multiple spatial paths, and the antenna spacing of the terminal device , Terminal equipment antenna horizontal distance, terminal equipment antenna vertical distance, etc. So that the network equipment can recover the complete channel information more accurately based on this information.

In addition, optionally, the difference information (amplitude difference, phase difference, delay difference, etc.) between the channel information of the second channel and the first channel can be reported to the network settings in the format of difference or ratio or quantization bits. In addition, the terminal device can also report the parameters corresponding to the difference information (amplitude difference, phase difference, delay difference, etc.) between the channel information of the second channel and the first channel, so that the network device can calculate the channel information according to the reported parameters. Difference information (amplitude difference, phase difference, delay difference, etc.), that is, the terminal device does not directly report the amplitude difference, phase difference or delay difference through a special field, but reports some intermediate parameters. Based on these intermediate parameters, the amplitude difference can be determined , The value of the phase difference or delay difference.

In the eighth embodiment of the method shown in FIG. 4, the method may further include: the network device sends instruction information to the terminal device, and the terminal device receives the instruction information sent by the network device; wherein the instruction information is used to instruct the terminal device to report Q difference information.

In this way, the network device sends the instruction information to the terminal device, so that the terminal device reports the difference information between the channel information based on the instruction information, which is simple and easy, and the terminal device only reports the difference information after receiving the instruction information, which reduces the terminal equipment Power consumption.

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

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

FIG. 6 is a schematic structural diagram of a communication device 60 provided by an embodiment of this application. The communication device involved in this embodiment may be a network device or a chip or a system on a chip in the network device. The communication device 60 can be used to perform the functions of the network device in the foregoing method embodiment. In an implementable manner, as shown in FIG. 6, the communication device may include: a processing unit 601 and a receiving unit 602.

The processing unit 601 is configured to obtain channel information of the N first channels; where the first channel is: the uplink channel between the first antenna port of the terminal device and the nth antenna port of the network device; n=1, 2,... N, N is the number of antenna ports of the network equipment;

The receiving unit 602 is configured to receive Q pieces of difference information sent by the terminal device; wherein, each piece of difference information in the Q pieces of difference information is used to indicate the difference information between the channel information of the second channel and the channel information of the first channel, and the second channel It is: the uplink channel between the second antenna port of the terminal device and the nth antenna port of the network device; Q is a positive integer. For example, the receiving unit 602 may be used to support the communication device 60 to perform step 404.

The processing unit 601 is further configured to determine the uplink channel information between the terminal device and the network device according to the channel information of the N first channels and the Q difference information. For example, the processing unit 601 may be used to support the communication device 60 to perform step 404.

Specifically, the communication device 60 provided in the embodiment of the present application can execute the actions of the network device in the method embodiment corresponding to FIG. 4, and its implementation principles and technical effects are similar, and will not be repeated here.

As yet another implementable manner, the communication device 60 shown in FIG. 6 may include: a processing module and a communication module. The processing module may integrate the functions of the processing unit 601, and the communication module may integrate the functions of the receiving unit 602. The processing module is used to support the communication device 60 to perform steps 401 and 404 and to control and manage the actions of the communication device 60, and the communication module is used to support the communication device 60 to perform step 404 and communicate with other network entities. Further, the communication device 60 shown in FIG. 6 further includes a storage module for storing program codes and data of the communication device 60.

Among them, the processing module may be a processor or a controller. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application. The processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication module can be a transceiver circuit or a transceiver. The storage module may be a memory. When the processing module is a processor, the communication module is a transceiver, and the storage module is a memory, the communication device 60 shown in FIG. 6 may be the communication device shown in FIG. 3.

As another achievable manner, an embodiment of the present application also provides a communication device, which may be a component (for example, a chip or a circuit) that can be used in a network device. The communication device may include a processor, and optionally, a transceiver and a memory. The processor may be used to implement the corresponding functions and operations of the foregoing processing unit 601, and the transceiver may be used to implement the corresponding functions and operations of the foregoing receiving unit 602. The memory can be used to store execution instructions or application program codes, and the processor can control the execution to implement the channel information acquisition method provided in the foregoing embodiments of the present application; and/or can also be used to temporarily store some data and instruction information. The memory can exist independently of the processor. At this time, the memory can be connected to the processor through a communication line. In another possible design, the memory may also be integrated with the processor, which is not limited in the embodiment of the present application.

FIG. 7 is a schematic structural diagram of a communication device 70 provided by an embodiment of this application. The communication device involved in this embodiment may be a terminal device or a chip or a system on a chip in the terminal device. The communication device 70 can be used to perform the functions of the terminal device in the foregoing method embodiments. In an implementation manner, as shown in FIG. 7, the communication device may include: a processing unit 701 and a sending unit 702.

The processing unit 701 is configured to determine Q pieces of difference information; where each piece of difference information in the Q pieces of difference information is used to indicate difference information between channel information of the second channel and channel information of the first channel, and the first channel Is: the uplink channel between the first antenna port of the terminal device and the nth antenna port of the network device; said n=1, 2,...N, where N is the number of antenna ports of the network device; The second channel is: an uplink channel between the second antenna port of the terminal device and the nth antenna port of the network device; the Q is a positive integer. For example, the processing unit 701 may be used to support the communication device 70 to perform step 402. For example, the processing unit 701 may be used to support the communication device 70 to perform step 402.

The sending unit 702 is configured to send the Q pieces of difference information to the network device. For example, the sending unit 702 may be used to support the communication device 70 to perform step 403.

Specifically, the communication device 70 provided in the embodiment of the present application can perform the actions of the terminal device in the method embodiment corresponding to FIG. 4, and its implementation principles and technical effects are similar, and will not be repeated here.

As yet another achievable manner, the communication device 70 shown in FIG. 7 may include: a processing module and a communication module. The processing module may integrate the functions of the processing unit 701, and the communication module may integrate the functions of the sending unit 702. The processing module is used to support the communication device 70 to perform step 402 and to control and manage the actions of the communication device 70, and the communication module is used to support the communication device 70 to perform step 403 and communicate with other network entities. Further, the communication device 70 shown in FIG. 7 further includes a storage module for storing program codes and data of the communication device 70.

Among them, the processing module may be a processor or a controller. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application. The processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication module can be a transceiver circuit or a transceiver. The storage module may be a memory. When the processing module is a processor, the communication module is a transceiver, and the storage module is a memory, the communication device 70 shown in FIG. 7 may be the communication device shown in FIG. 3.

As another achievable manner, an embodiment of the present application also provides a communication device, which may be a component (for example, a chip or a circuit) that can be used in a network device. The communication device may include a processor, and optionally, a transceiver and a memory. The processor may be used to implement the corresponding functions and operations of the foregoing processing unit 701, and the transceiver may be used to implement the corresponding functions and operations of the foregoing sending unit 702. The memory can be used to store execution instructions or application program codes, and the processor can control the execution to implement the channel information acquisition method provided in the foregoing embodiments of the present application; and/or can also be used to temporarily store some data and instruction information. The memory can exist independently of the processor. At this time, the memory can be connected to the processor through a communication line. In another possible design, the memory may also be integrated with the processor, which is not limited in the embodiment of the present application.

FIG. 8 is a schematic structural diagram of a system for acquiring channel information according to an embodiment of the application. As shown in FIG. 8, the system may include a network device 80 and multiple terminal devices 81.

Among them, the network device 80 has the same function as the communication device 60 shown in FIG. 6. The terminal device 81 has the same function as the communication device 70 shown in FIG. 7.

For example, the network device 80 is configured to obtain channel information of N first channels; where the first channel is: the uplink channel between the first antenna port of the terminal device 81 and the nth antenna port of the network device 80; n=1 , 2,...N, N is the number of antenna ports of the network device 80;

The terminal device 81 is configured to determine Q pieces of difference information and send Q pieces of difference information to the network device 80; wherein each piece of difference information in the Q pieces of difference information is used to indicate the channel information of the second channel and the channel information of the first channel The second channel is: the uplink channel between the second antenna port of the terminal device 81 and the nth antenna port of the network device 80; Q is a positive integer.

The network device 80 is further configured to receive Q pieces of difference information sent by the terminal device 81, and determine the uplink channel information between the terminal device 81 and the network device 80 according to the channel information of the N first channels and the Q pieces of difference information.

Specifically, the channel information acquisition system provided by the embodiment of the present application can execute the method embodiment corresponding to FIG. 4, and its implementation principles and technical effects are similar, and will not be repeated.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated as required. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed device and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components may be It can be combined or integrated into another device, or some features can be omitted or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate, and the parts displayed as units may be one physical unit or multiple physical units, that is, they may be located in one place, or they may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of software products, which are stored in a storage medium It includes several instructions to make a device (may be a single-chip microcomputer, a chip, etc.) or a processor (processor) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any change or replacement within the technical scope disclosed in this application shall be covered by the protection scope of this application . Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (29)

A method for acquiring channel information, characterized in that the method includes: The network device obtains channel information of N first channels; wherein, the first channel is: an uplink channel between the first antenna port of the terminal device and the nth antenna port of the network device; the n=1, 2 ,...N, where N is the number of antenna ports of the network device; The network device receives Q pieces of difference information sent by the terminal device; wherein each piece of difference information in the Q pieces of difference information is used to indicate difference information between channel information of the second channel and channel information of the first channel , The second channel is: an uplink channel between the second antenna port of the terminal device and the nth antenna port of the network device; the Q is a positive integer; The network device determines the uplink channel information between the terminal device and the network device according to the channel information of the N first channels and the Q difference information. The method according to claim 1, wherein the difference information includes at least one of the following information: channel amplitude difference information, channel energy difference information, channel phase difference information, or channel delay difference information. The method according to claim 1 or 2, wherein the first channel includes K first channel components, the second channel includes K corresponding second channel components, and the K is a positive integer; The difference information includes: indication information of K pieces of component difference information, and each component difference information of the K pieces of component difference information includes: the channel information of the first channel component and the corresponding second channel component. Difference information of channel information. The method according to any one of claims 1-3, wherein the difference information comprises: difference information of a channel at one or more frequency points. The method according to any one of claims 1 to 4, wherein the Q pieces of difference information comprise: first difference information and second difference information; and the first difference information is used to indicate the first difference information and the second difference information. Difference information of channel information between the channel and the first channel; The second difference information is used to indicate the difference information of channel information between the first second channel and the second second channel. The method according to any one of claims 1-5, wherein the method further comprises: The network device sends instruction information to the terminal device; wherein the instruction information is used to instruct the terminal device to report the Q pieces of difference information. A method for acquiring channel information, characterized in that the method includes: The terminal device determines Q pieces of difference information; wherein, each piece of difference information in the Q pieces of difference information is used to indicate difference information between channel information of the second channel and channel information of the first channel, and the first channel is: The uplink channel between the first antenna port of the terminal device and the nth antenna port of the network device; said n=1, 2,...N, where N is the number of antenna ports of the network device; the second channel Is: the uplink channel between the second antenna port of the terminal device and the nth antenna port of the network device; the Q is a positive integer; The terminal device sends the Q pieces of difference information to the network device. The method according to claim 7, wherein the difference information includes at least one of the following information: channel amplitude difference information, channel energy difference information, channel phase difference information, or channel delay difference information. The method according to claim 7 or 8, wherein the first channel includes K first channel components, the second channel includes K corresponding second channel components, and the K is a positive integer; The difference information includes indication information of K pieces of component difference information, and each component difference information of the K pieces of component difference information includes: the difference between the channel information of the first channel component and the corresponding second channel component Difference information of channel information. The method according to any one of claims 7-9, wherein the difference information comprises: difference information of a channel at one or more frequency points. The method according to any one of claims 7-10, wherein the Q pieces of difference information comprise: first difference information and second difference information; the first difference information is used to indicate the first difference information and the second difference information. Difference information of channel information between a channel and the first channel; The second difference information is used to indicate the difference information of channel information between the first second channel and the second second channel. The method according to any one of claims 7-11, wherein the method further comprises: The terminal device receives the instruction information sent by the network device; wherein the instruction information is used to instruct the terminal device to report the Q pieces of difference information. A network device, characterized in that, the network device includes: The processing unit is configured to obtain channel information of N first channels; where the first channel is: an uplink channel between the first antenna port of the terminal device and the nth antenna port of the network device; the n= 1, 2, ... N, where N is the number of antenna ports of the network device; The receiving unit is configured to receive Q pieces of difference information sent by the terminal device; wherein each piece of difference information in the Q pieces of difference information is used to indicate the difference between the channel information of the second channel and the channel information of the first channel Information, the second channel is: an uplink channel between the second antenna port of the terminal device and the nth antenna port of the network device; the Q is a positive integer; The processing unit is further configured to determine the uplink channel information between the terminal device and the network device according to the channel information of the N first channels and the Q difference information. The network device according to claim 13, wherein the difference information includes at least one of the following information: channel amplitude difference information, channel energy difference information, channel phase difference information, or channel delay difference information . The network device according to claim 13 or 14, wherein the first channel includes K first channel components, the second channel includes K corresponding second channel components, and the K is a positive integer ； The difference information includes indication information of K pieces of component difference information, and each component difference information of the K pieces of component difference information includes: the difference between the channel information of the first channel component and the corresponding second channel component Difference information of channel information. The network device according to any one of claims 13-15, wherein the difference information comprises: difference information of the channel at one or more frequency points. The network device according to any one of claims 13-16, wherein the Q pieces of difference information comprise: first difference information and second difference information; the first difference information is used to indicate the first difference information Difference information of channel information between the second channel and the first channel; The second difference information is used to indicate the difference information of channel information between the first second channel and the second second channel. The network device according to any one of claims 13-17, wherein the network device further comprises: The sending unit is further configured to send instruction information to the terminal device; wherein the instruction information is used to instruct the terminal device to report the Q pieces of difference information. A terminal device, characterized in that the terminal device includes: The processing unit is configured to determine Q pieces of difference information; wherein, each piece of difference information in the Q pieces of difference information is used to indicate difference information between channel information of the second channel and channel information of the first channel, and the first channel is : The uplink channel between the first antenna port of the terminal device and the nth antenna port of the network device; said n=1, 2,...N, where N is the number of antenna ports of the network device; The second channel is: the uplink channel between the second antenna port of the terminal device and the nth antenna port of the network device; the Q is a positive integer; The sending unit is configured to send the Q pieces of difference information to the network device. The terminal device according to claim 19, wherein the difference information includes at least one of the following information: channel amplitude difference information, channel energy difference information, channel phase difference information, or channel delay difference information . The terminal device according to claim 19 or 20, wherein the first channel includes K first channel components, the second channel includes K corresponding second channel components, and the K is a positive integer ； The difference information includes indication information of K pieces of component difference information, and each component difference information of the K pieces of component difference information includes: the difference between the channel information of the first channel component and the corresponding second channel component Difference information of channel information. The terminal device according to any one of claims 19-21, wherein the difference information comprises: difference information of a channel at one or more frequency points. The terminal device according to any one of claims 19-22, wherein the Q pieces of difference information comprise: first difference information and second difference information; and the first difference information is used to indicate the first difference information. Difference information of channel information between the second channel and the first channel; The second difference information is used to indicate the difference information of channel information between the first second channel and the second second channel. The terminal device according to any one of claims 19-23, wherein the terminal device further comprises: The receiving unit is further configured to receive instruction information sent by the network device; wherein the instruction information is used to instruct the terminal device to report the Q pieces of difference information. A communication system, characterized in that the communication system includes: A terminal device, configured to determine Q pieces of difference information, and send the Q pieces of difference information to a network device; wherein each piece of difference information in the Q pieces of difference information is used to indicate the channel information of the second channel and the channel of the first channel Information difference information, the first channel is: the uplink channel between the first antenna port of the terminal device and the nth antenna port of the network device; the n=1, 2,...N, and the N is all The number of antenna ports of the network device; the second channel is: the uplink channel between the second antenna port of the terminal device and the nth antenna port of the network device; the Q is a positive integer; The network device is configured to obtain channel information of N first channels, and receive Q difference information sent by the terminal device, and determine the channel information of the N first channels and the Q difference information Uplink channel information between the terminal device and the network device; wherein, the first channel is: an uplink channel between the first antenna port of the terminal device and the nth antenna port of the network device. A communication device for executing the channel information acquisition method according to any one of claims 1-6 or the channel information acquisition method according to any one of claims 7-12. A communication device, wherein the communication device comprises a processor and a memory, the memory is coupled to the processor, and the processor is configured to execute the channel information acquisition method according to any one of claims 1 to 6 or The method for acquiring channel information according to any one of claims 7-12. A computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the computer instructions run on a computer, the computer executes the channel information acquisition according to any one of claims 1 to 6 The method or the channel information acquisition method according to any one of claims 7-12. A computer program product, wherein the computer program product includes computer instructions, when the computer instructions run on a computer, the computer executes the method for acquiring channel information according to any one of claims 1-6 or The channel information acquisition method described in any one of 7-12 is required.

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