WO2024138734A1 - Precoding method, apparatus, and storage medium - Google Patents

Abstract

The present disclosure relates to the technical field of communications, and relates to a precoding method, an apparatus, and a storage medium, which are used for reducing the complexity of precoding. The method comprises: acquiring large-scale antenna array information of a second network device, the large-scale antenna array information at least comprising array block information; on the basis of the array block information in the large-scale antenna array information, determining precoding matrix indication information, the precoding matrix indication information being used for the second network device to determine a precoding matrix of one or more array blocks in the large-scale antenna array; and sending the precoding matrix indication information to the second network device.

Description

A precoding method, device and storage medium Technical Field

The present disclosure relates to the field of communication technology, and in particular to a precoding method, device and storage medium.

Background technique

The continuous emergence of a new generation of new Internet applications such as Augmented Reality (AR)/Virtual Reality (VR), vehicle-to-vehicle communications, etc. has put forward higher requirements on wireless communication technology, driving the continuous evolution of wireless communication technology to meet the needs of applications.

The uncontrollability of the wireless transmission environment in wireless communication technology usually has a negative effect on communication efficiency, which is mainly reflected in the reduction of service quality. For example, the attenuation of signals in the wireless transmission environment limits the propagation distance of wireless signals, and the multipath effect also leads to fading. The reflection and refraction of large objects are the main uncontrollable factors. At present, it is considered to deploy large-scale antenna arrays on the surface of objects, such as intelligent metasurfaces (Reconfigurable Intelligent Surface, RIS). By precoding the antenna array, the reference signal incident on its surface is forwarded to a specific direction, thereby enhancing the signal strength at the receiving end and achieving control of the channel.

However, in the related art, different algorithms need to be used to design precoding matrices for large-scale antenna arrays and network devices respectively, which is too complicated.

Summary of the invention

In order to overcome the problems existing in the related art, the present disclosure provides a precoding method, device and storage medium.

According to a first aspect of an embodiment of the present disclosure, a precoding method is provided, which is applied to a first network device, and the method includes: obtaining large-scale antenna array information of a second network device, wherein the large-scale antenna array information includes at least array block information; based on the array block information included in the large-scale antenna array information, determining precoding matrix indication information, wherein the precoding matrix indication information is used by the second network device to determine a precoding matrix of one or more array blocks included in the large-scale antenna array; and sending the precoding matrix indication information to the second network device.

In one embodiment, the precoding matrix indication information is determined based on the array block information included in the large-scale antenna array information, including: precoding matrix identifier PMI information corresponding to the reference signal in the one or more array blocks reported by the receiving terminal; and the precoding matrix indication information is determined based on the PMI information and the incident angle information.

In one implementation, the method further includes: sending first configuration information of the reference signal to a terminal, where the first configuration information is used by the terminal to determine PMI information corresponding to the reference signal in the one or more array blocks.

In one implementation, the first configuration information includes at least one of the following:

The array blocks corresponding to the reference signal;

The time-frequency resources occupied by the reference signal;

The sequence information of the reference signal.

In one implementation, the PMI information corresponding to the reference signal in the one or more array blocks reported by the receiving terminal includes: the PMI information corresponding to the reference signal in the one or more array blocks reported by the receiving terminal once; or the PMI information corresponding to the reference signal in the one or more array blocks reported by the receiving terminal multiple times, wherein the PMI information reported each time in the multiple times includes the PMI information corresponding to the reference signal in the one or more array blocks.

In one embodiment, the method further includes: sending second configuration information of the reference signal to the second network device, wherein the second configuration information is used by the second network device to determine the reference signal sent by one or more array blocks in the large-scale antenna array.

In one implementation, the precoding matrix indication information includes: a precoding matrix identifier PMI and/or a phase coefficient corresponding to the precoding matrix of the one or more array blocks; or a precoding matrix in the one or more array blocks.

In one implementation, the obtaining of the large-scale antenna array information includes obtaining the large-scale antenna array information reported by the second network device; or obtaining the large-scale antenna array information stored offline by the core network device from the core network device.

In one embodiment, the large-scale antenna array includes a RIS array of a smart metasurface RIS.

According to a second aspect of an embodiment of the present disclosure, a precoding method is provided, which is applied to a second network device, and the method includes: receiving precoding matrix indication information sent by a first network device; based on the precoding matrix indication information, determining a precoding matrix of one or more array blocks included in a large-scale antenna array of the second network device.

In one implementation, the method further includes: sending large-scale antenna array information to the first network device, the large-scale antenna array information at least including array block information, and the array block information is used by the first network device to determine the precoding matrix indication information.

In one embodiment, the method further includes: obtaining second configuration information of the reference signal to be sent by the one or more array blocks; determining the reference signal sent by the one or more array blocks based on the second configuration information; and sending the reference signal to the terminal based on the one or more array blocks, so that the terminal determines the PMI information corresponding to the reference signal sent by the one or more array blocks.

In one embodiment, obtaining the second configuration information of the reference signal to be sent by the one or more array blocks includes: receiving the second configuration information of the reference signal sent by the first network device; or obtaining the second configuration information of the reference signal stored offline by the core network device from the core network device.

In one implementation, the precoding matrix indication information includes: a precoding matrix identifier PMI and/or a phase coefficient corresponding to the precoding matrix of the one or more array blocks; or a precoding matrix in the one or more array blocks.

In one embodiment, the large-scale antenna array includes a RIS array of a smart metasurface RIS.

According to a third aspect of an embodiment of the present disclosure, a precoding method is provided, which is applied to a terminal, and the method includes:

Determine precoding matrix identifier PMI information corresponding to reference signals in one or more array blocks included in a large-scale antenna array of a second network device;

The PMI information corresponding to the reference signal in the one or more array blocks is sent to the first network device, the PMI information is used by the first network device to determine the precoding matrix indication information, and the precoding matrix indication information is used by the second network device to determine the precoding matrix of one or more array blocks included in the large-scale antenna array.

In one implementation, the method further includes: receiving first configuration information of a reference signal sent by the first network device; and determining PMI information corresponding to the reference signal in the one or more array blocks based on the first configuration information.

In one implementation, the first configuration information includes at least one of the following:

The array blocks corresponding to the reference signal;

The time-frequency resources occupied by the reference signal;

The sequence information of the reference signal.

In one implementation, determining the PMI information corresponding to the reference signal in the one or more array blocks based on the first configuration information includes:

Receiving a reference signal sent by one or more array blocks in a large-scale antenna array of the second network device;

Based on the first configuration information, channel estimation is performed on the reference signals sent by the one or more array blocks to determine PMI information corresponding to the reference signals in the one or more array blocks.

In one implementation, the sending the PMI information corresponding to the reference signal in the one or more array blocks to the first network device includes:

Reporting the PMI information corresponding to the reference signals in the one or more array blocks to the first network device at one time; or

Reporting PMI information corresponding to the reference signals in the one or more array blocks to the first network device multiple times, wherein the PMI information reported each time in the multiple times includes the PMI information corresponding to the reference signals in the one or more array blocks.

In one embodiment, the large-scale antenna array includes a RIS array of a smart metasurface RIS.

According to a fourth aspect of an embodiment of the present disclosure, a precoding method is provided, which is applied to a first network device, and the method includes:

Determine large-scale antenna array information, wherein the large-scale antenna array information includes at least array block information;

Determine precoding matrix indication information based on array block information included in the large-scale antenna array information;

Based on the precoding matrix indication information, a precoding matrix of one or more array blocks included in the large-scale antenna array is determined.

In one implementation, the determining of the precoding matrix indication information based on the array block information included in the large-scale antenna array information includes:

receiving precoding matrix identifier PMI information corresponding to the reference signal in the one or more array blocks reported by the terminal;

The precoding matrix indication information is determined based on the PMI information and the incident angle information.

In one embodiment, the method further comprises:

Sending first configuration information of the reference signal to a terminal, where the first configuration information is used by the terminal to determine PMI information corresponding to the reference signal in the one or more array blocks.

In one implementation, the first configuration information includes at least one of the following:

The array blocks corresponding to the reference signal;

The time-frequency resources occupied by the reference signal;

The sequence information of the reference signal.

In one implementation manner, the PMI information corresponding to the reference signal in the one or more array blocks reported by the receiving terminal includes:

receiving PMI information corresponding to the reference signals in the one or more array blocks reported by the terminal at one time; or

The receiving terminal reports PMI information corresponding to the reference signals in the one or more array blocks for multiple times, wherein the PMI information reported each time for the multiple times includes the PMI information corresponding to the reference signals in the one or more array blocks.

In one embodiment, the method further comprises:

Determining second configuration information of reference signals to be sent by one or more arrays;

Determining, based on the second configuration information, reference signals sent by the one or more array blocks;

A reference signal is sent to a terminal based on the one or more array blocks, so that the terminal determines PMI information corresponding to the reference signal sent by the one or more array blocks.

In one implementation, the precoding matrix indication information includes:

a precoding matrix identifier PMI and/or a phase coefficient corresponding to the precoding matrix of the one or more array blocks; or

The precoding matrices in the one or more array blocks.

In one embodiment, the large-scale antenna array includes a RIS array of a smart metasurface RIS.

According to a fifth aspect of an embodiment of the present disclosure, a precoding method is provided, which is applied to a terminal, and the method includes:

Determine precoding matrix identifier PMI information corresponding to reference signals in one or more array blocks included in a large-scale antenna array of a first network device;

The PMI information corresponding to the reference signal in the one or more array blocks is sent to the first network device, and the PMI information is used by the first network device to determine the precoding matrix indication information, and the precoding matrix indication information is used by the first network device to determine the precoding matrix of one or more array blocks included in the large-scale antenna array.

In one embodiment, the method further comprises:

Receiving first configuration information of a reference signal sent by the first network device;

The PMI information corresponding to the reference signals in the one or more array blocks is determined based on the first configuration information.

In one implementation, the first configuration information includes at least one of the following:

The array blocks corresponding to the reference signal;

The time-frequency resources occupied by the reference signal;

The sequence information of the reference signal.

In one implementation, determining the PMI information corresponding to the reference signal in the one or more array blocks based on the first configuration information includes:

Receiving a reference signal sent by one or more array blocks in a large-scale antenna array of the first network device;

Based on the first configuration information, channel estimation is performed on the reference signals sent by the one or more array blocks to determine PMI information corresponding to the reference signals in the one or more array blocks.

In one implementation, the sending the PMI information corresponding to the reference signal in the one or more array blocks to the first network device includes:

Reporting the PMI information corresponding to the reference signals in the one or more array blocks to the first network device at one time; or

Reporting PMI information corresponding to the reference signals in the one or more array blocks to the first network device multiple times, wherein the PMI information reported each time in the multiple times includes the PMI information corresponding to the reference signals in the one or more array blocks.

In one embodiment, the large-scale antenna array includes a RIS array of a smart metasurface RIS.

According to a sixth aspect of an embodiment of the present disclosure, a precoding device is provided, which is applied to a first network device, and the device includes:

An acquisition module, configured to acquire large-scale antenna array information of a second network device, wherein the large-scale antenna array information includes at least array block information;

A determination module, configured to determine precoding matrix indication information based on array block information included in the large-scale antenna array information, wherein the precoding matrix indication information is used by the second network device to determine a precoding matrix of one or more array blocks included in the large-scale antenna array;

A sending module is used to send the precoding matrix indication information to the second network device.

In one embodiment, a receiving module is used to receive precoding matrix identification PMI information corresponding to the reference signal in the one or more array blocks reported by the terminal; and a determining module is used to determine the precoding matrix indication information based on the PMI information and incident angle information.

In one implementation, the sending module is used to send first configuration information of the reference signal to a terminal, where the first configuration information is used by the terminal to determine PMI information corresponding to the reference signal in the one or more array blocks.

In one implementation, the first configuration information includes at least one of the following:

The array blocks corresponding to the reference signal;

The time-frequency resources occupied by the reference signal;

The sequence information of the reference signal.

In one implementation, the receiving module is used to receive the PMI information corresponding to the reference signal in the one or more array blocks reported by the terminal once; or receive the PMI information corresponding to the reference signal in the one or more array blocks reported by the terminal multiple times, wherein the PMI information reported each time in the multiple times includes the PMI information corresponding to the reference signal in the one or more array blocks.

In one embodiment, the sending module is used to send second configuration information of the reference signal to the second network device, and the second configuration information is used by the second network device to determine the reference signal sent by one or more array blocks in the large-scale antenna array.

In one implementation, the precoding matrix indication information includes: a precoding matrix identifier PMI and/or a phase coefficient corresponding to the precoding matrix of the one or more array blocks; or a precoding matrix in the one or more array blocks.

In one implementation, the acquisition module is used to acquire the large-scale antenna array information reported by the second network device; or to acquire the large-scale antenna array information stored offline by the core network device from the core network device.

In one embodiment, the large-scale antenna array includes a RIS array of a smart metasurface RIS.

According to a seventh aspect of an embodiment of the present disclosure, a precoding device is provided, which is applied to a second network device, and the device includes:

A receiving module, used to receive precoding matrix indication information sent by the first network device;

A determination module is used to determine, based on the precoding matrix indication information, a precoding matrix of one or more array blocks included in the large-scale antenna array of the second network device.

In one implementation, the sending module is used to send large-scale antenna array information to the first network device, where the large-scale antenna array information includes at least array block information, and the array block information is used by the first network device to determine the precoding matrix indication information.

In one embodiment, an acquisition module is used to acquire second configuration information of a reference signal to be sent by the one or more array blocks; a determination module is used to determine the reference signal sent by the one or more array blocks based on the second configuration information; and a sending module is used to send a reference signal to a terminal based on the one or more array blocks, so that the terminal determines the PMI information corresponding to the reference signal sent by the one or more array blocks.

In one implementation, the acquisition module is used to receive the second configuration information of the reference signal sent by the first network device; or to acquire the second configuration information of the reference signal stored offline by the core network device from the core network device.

In one implementation, the precoding matrix indication information includes: a precoding matrix identifier PMI and/or a phase coefficient corresponding to the precoding matrix of the one or more array blocks; or a precoding matrix in the one or more array blocks.

In one embodiment, the large-scale antenna array includes a RIS array of a smart metasurface RIS.

According to an eighth aspect of an embodiment of the present disclosure, a precoding device is provided, applied to a terminal, the device including:

A determination module, configured to determine precoding matrix identifier PMI information corresponding to reference signals in one or more array blocks included in a large-scale antenna array of a second network device;

A sending module is used to send PMI information corresponding to the reference signal in the one or more array blocks to the first network device, the PMI information is used by the first network device to determine precoding matrix indication information, and the precoding matrix indication information is used by the second network device to determine the precoding matrix of one or more array blocks included in the large-scale antenna array.

In one implementation, the receiving module is configured to receive first configuration information of a reference signal sent by the first network device; and determine PMI information corresponding to the reference signal in the one or more array blocks based on the first configuration information.

In one implementation, the first configuration information includes at least one of the following:

The array blocks corresponding to the reference signal;

The time-frequency resources occupied by the reference signal;

The sequence information of the reference signal.

In one implementation, the receiving module is used to receive a reference signal sent by one or more array blocks in a large-scale antenna array of the second network device;

A determination module is used to perform channel estimation on the reference signals sent by the one or more array blocks based on the first configuration information, and determine PMI information corresponding to the reference signals in the one or more array blocks.

In one implementation, the sending module is used to report the PMI information corresponding to the reference signals in the one or more array blocks to the first network device at one time; or

Reporting PMI information corresponding to the reference signals in the one or more array blocks to the first network device multiple times, wherein the PMI information reported each time in the multiple times includes the PMI information corresponding to the reference signals in the one or more array blocks.

In one embodiment, the large-scale antenna array includes a RIS array of a smart metasurface RIS.

According to a ninth aspect of an embodiment of the present disclosure, a precoding apparatus is provided, which is applied to a first network device, and the apparatus includes:

A determination module is used to determine large-scale antenna array information, wherein the large-scale antenna array information at least includes array block information; based on the array block information included in the large-scale antenna array information, determine precoding matrix indication information; based on the precoding matrix indication information, determine the precoding matrix of one or more array blocks included in the large-scale antenna array.

In one implementation, the receiving module is configured to receive precoding matrix identifier PMI information corresponding to the reference signal in the one or more array blocks reported by the terminal;

The determination module is used to determine the precoding matrix indication information based on the PMI information and the incident angle information.

In one implementation, the sending module is used to send first configuration information of the reference signal to a terminal, where the first configuration information is used by the terminal to determine PMI information corresponding to the reference signal in the one or more array blocks.

In one implementation, the first configuration information includes at least one of the following:

The array blocks corresponding to the reference signal;

The time-frequency resources occupied by the reference signal;

The sequence information of the reference signal.

In one implementation, the receiving module is used to receive the PMI information corresponding to the reference signal in the one or more array blocks reported by the terminal once; or receive the PMI information corresponding to the reference signal in the one or more array blocks reported by the terminal multiple times, wherein the PMI information reported each time in the multiple times includes the PMI information corresponding to the reference signal in the one or more array blocks.

In one embodiment, the determination module is used to determine second configuration information of a reference signal to be sent by one or more arrays; based on the second configuration information, determine the reference signal sent by the one or more array blocks; and send the reference signal to the terminal based on the one or more array blocks, so that the terminal determines the PMI information corresponding to the reference signal sent by the one or more array blocks.

In one implementation, the precoding matrix indication information includes:

The precoding matrix identifier PMI and/or phase coefficient corresponding to the precoding matrix of the one or more array blocks; or

The precoding matrices in the one or more array blocks.

In one embodiment, the large-scale antenna array includes a RIS array of a smart metasurface RIS.

According to a tenth aspect of an embodiment of the present disclosure, a precoding device is provided, applied to a terminal, the device including:

A determination module, configured to determine precoding matrix identifier PMI information corresponding to reference signals in one or more array blocks included in a large-scale antenna array of a first network device;

A sending module is used to send PMI information corresponding to the reference signal in the one or more array blocks to the first network device, and the PMI information is used by the first network device to determine precoding matrix indication information, and the precoding matrix indication information is used by the first network device to determine the precoding matrix of one or more array blocks included in the large-scale antenna array.

In one implementation, the receiving module is configured to receive first configuration information of a reference signal sent by the first network device;

A determination module is used to determine PMI information corresponding to the reference signals in the one or more array blocks based on the first configuration information.

In one implementation, the first configuration information includes at least one of the following:

The array blocks corresponding to the reference signal;

The time-frequency resources occupied by the reference signal;

The sequence information of the reference signal.

In one implementation, the receiving module is used to receive a reference signal sent by one or more array blocks in a large-scale antenna array of the first network device;

A determination module is used to perform channel estimation on the reference signals sent by the one or more array blocks based on the first configuration information, and determine PMI information corresponding to the reference signals in the one or more array blocks.

In one implementation, the sending module is used to report the PMI information corresponding to the reference signal in the one or more array blocks to the first network device once; or to report the PMI information corresponding to the reference signal in the one or more array blocks to the first network device multiple times, wherein the PMI information reported each time in the multiple times includes the PMI information corresponding to the reference signal in the one or more array blocks.

In one embodiment, the large-scale antenna array includes a RIS array of a smart metasurface RIS.

According to the eleventh aspect of an embodiment of the present disclosure, a communication device is provided, the device comprising: a processor; a memory for storing processor executable instructions; wherein the processor is configured to: execute the precoding method described in any one of the above-mentioned first aspect and one of its embodiments, or execute the precoding method described in any one of the above-mentioned second aspect and one of its embodiments, or execute the precoding method described in any one of the above-mentioned third aspect and one of its embodiments, or execute the precoding method described in any one of the above-mentioned fourth aspect and one of its embodiments, or execute the precoding method described in any one of the above-mentioned fifth aspect and one of its embodiments.

According to the twelfth aspect of an embodiment of the present disclosure, a storage medium is provided, in which instructions are stored. When the instructions in the storage medium are executed by a processor of a first network device, the first network device is enabled to execute the precoding method described in any one of the first aspect and one of its embodiments, or when the instructions in the storage medium are executed by a processor of a second network device, the second network device is enabled to execute the precoding method described in any one of the first aspect and one of its embodiments, or when the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the precoding method described in any one of the first aspect and one of its embodiments, when the instructions in the storage medium are executed by the processor of the first network device, the first network device is enabled to execute the precoding method described in any one of the third aspect and one of its embodiments, or when the instructions in the storage medium are executed by the processor of the terminal, the terminal is enabled to execute the precoding method described in any one of the fifth aspect and one of its embodiments.

The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: by dividing the large-scale antenna array into multiple array blocks, the precoding matrix of each array block is determined respectively, which reduces the complexity of precoding compared with the related art of precoding the large-scale antenna array as a whole. At the same time, the array block is used as the minimum reflection unit, so that the size of the array block is greatly different from the transmission distance of the signal, so that the far-field assumption is valid for a single array block.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

Fig. 1 is a schematic diagram of a communication system according to an exemplary embodiment.

Fig. 2 is a schematic diagram of yet another communication system according to an exemplary embodiment.

Fig. 3 is a flow chart showing a precoding method according to an exemplary embodiment.

Fig. 4 is a flow chart showing a method of determining precoding matrix indication information according to an exemplary embodiment.

Fig. 5 is a flow chart showing a method for determining PMI information according to an exemplary embodiment.

Fig. 6 is a flowchart showing a method for determining a reference signal sent by an array block according to an exemplary embodiment.

Fig. 7 is a flowchart showing a precoding method according to an exemplary embodiment.

Fig. 8 is a flow chart showing a method of sending large-scale antenna array information according to an exemplary embodiment.

Fig. 9 is a flowchart showing a method for determining a reference signal sent by an array block according to an exemplary embodiment.

Fig. 10 is a flowchart showing a precoding method according to an exemplary embodiment.

Fig. 11 is a flowchart showing a method for determining PMI information according to an exemplary embodiment.

Fig. 12 is a flowchart showing a method for determining a reference signal sent by an array block according to an exemplary embodiment.

Fig. 13 is a flowchart showing a precoding method according to an exemplary embodiment.

Fig. 14 is a flowchart showing a precoding method according to an exemplary embodiment.

Fig. 15 is a flowchart showing a method of determining precoding matrix indication information according to an exemplary embodiment.

Fig. 16 is a flowchart showing a method for determining a reference signal sent by an array block according to an exemplary embodiment.

Fig. 17 is a flowchart showing a precoding method according to an exemplary embodiment.

Fig. 18 is a flow chart showing a method for determining PMI information according to an exemplary embodiment.

Fig. 19 is a flowchart showing a method for determining a reference signal sent by an array block according to an exemplary embodiment.

Fig. 20 is a flowchart showing a precoding method according to an exemplary embodiment.

Fig. 21 is a block diagram showing a precoding device according to an exemplary embodiment.

Fig. 22 is a block diagram showing a precoding device according to an exemplary embodiment.

Fig. 23 is a block diagram showing a precoding device according to an exemplary embodiment.

Fig. 24 is a block diagram showing a precoding device according to an exemplary embodiment.

Fig. 25 is a block diagram showing a precoding device according to an exemplary embodiment.

Fig. 26 is a block diagram showing a precoding apparatus according to an exemplary embodiment.

Fig. 27 is a block diagram showing a precoding apparatus according to an exemplary embodiment.

Detailed ways

Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present disclosure.

The precoding method provided in the embodiment of the present disclosure can be applied to various wireless communication systems. The wireless communication system of the embodiment of the present disclosure is a network that provides wireless communication functions. The wireless communication system can adopt different communication technologies, such as Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency-Division Multiple Access (OFDMA), Single Carrier FDMA (SC-FDMA), Carrier Sense Multiple Access with Collision Avoidance. According to the capacity, rate, delay and other factors of different networks, the network can be divided into 2G (English: Generation) network, 3G network, 4G network or future evolution network, such as the fifth generation wireless communication system (The 5th Generation Wireless Communication System, 5G) network. The 5G network can also be called the new wireless network (New Radio, NR).

FIG1 is a schematic diagram of a wireless communication system according to an embodiment of the present disclosure. Referring to FIG1 , the wireless communication system may include a first network device 110 , a second network device 120 , and a terminal 130 .

The second network device 120 has a large-scale antenna array. The first network device 110 sends a signal to the second network device 120, and the second network device 120 forwards the signal to the terminal 130 through the large-scale antenna array. Of course, the terminal 130 can also send a signal to the second network device 120, and the second network device 120 forwards the signal to the first network device 110 through the large-scale antenna array.

Furthermore, the first network device 110 involved in the present disclosure may also be referred to as a wireless access network device. The wireless access network device may be: a base station, an evolved Node B (eNB), a home base station, an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and receiving point (TRP), etc. It may also be a gNB in an NR system, or it may also be a component or a part of a base station. When it is a vehicle-to-everything (V2X) communication system, the network device may also be a vehicle-mounted device. It should be understood that in the embodiments of the present disclosure, the specific technology and specific device form adopted by the network device are not limited.

Furthermore, the second network device 120 involved in the present disclosure has a large-scale antenna array. When the first network device 110 forwards the signal to the terminal 130 through the large-scale antenna array in the second network device 120, different antenna arrays in the large-scale antenna array of the second network device 120 can perform different phase shifts on the received signal, thereby achieving an effect of adjustable beam direction. At the same time, since the offset phase angle of the antenna array can only be a discrete value, in order to forward the incident signal to the terminal 130, it is necessary to configure the offset phase of the antenna array, that is, precoding. Therefore, through the precoding technology, the signal incident to the large-scale antenna array can be forwarded to a specific direction, thereby enhancing the signal strength at the receiving end. The second network device 120 involved in the present disclosure can be a device such as a Reconfigurable Intelligent Surface (RIS) that can be deployed on the surface of various objects in a wireless transmission environment.

Furthermore, the terminal 130 involved in the present disclosure may also be referred to as a terminal device, a user equipment (User Equipment, UE), a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal, MT), etc., which is a device that provides voice and/or data connectivity to users. For example, the terminal may be a handheld device with a wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: a smart phone (Mobile Phone), a pocket computer (Pocket Personal Computer, PPC), a handheld computer, a personal digital assistant (Personal Digital Assistant, PDA), a laptop computer, a tablet computer, a wearable device, or a vehicle-mounted device, etc. In addition, when it is a vehicle-to-everything (V2X) communication system, the terminal device may also be a vehicle-mounted device. It should be understood that the embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal.

FIG2 is a schematic diagram of another wireless communication system provided in an embodiment of the present disclosure. Referring to FIG2 , the wireless communication system may include a first network device 210 and a terminal 220 .

The first network device 210 has a large-scale antenna array. The signal sent by the first network device 210 can be forwarded to the terminal 220 through the large-scale antenna array. Of course, the terminal 220 can also send a signal to the large-scale antenna array, and the large-scale antenna array forwards the signal to the first network device 210.

Further, the first network device 210 involved in the present disclosure has a large-scale antenna array, and the first network device 210 can also be called a wireless access network device. The wireless access network device can be: a base station, an evolved Node B (eNB), a home base station, an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and receiving point (TRP), etc. It can also be a gNB in an NR system, or it can also be a component or a part of a base station. When it is a vehicle-to-everything (V2X) communication system, the network device can also be a vehicle-mounted device. It should be understood that in the embodiments of the present disclosure, the specific technology and specific device form adopted by the first network device are not limited.

Furthermore, the terminal 220 involved in the present disclosure may also be referred to as a terminal device, a user equipment (User Equipment, UE), a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal, MT), etc., which is a device that provides voice and/or data connectivity to users. For example, the terminal may be a handheld device with a wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: a smart phone (Mobile Phone), a pocket computer (Pocket Personal Computer, PPC), a handheld computer, a personal digital assistant (Personal Digital Assistant, PDA), a laptop computer, a tablet computer, a wearable device, or a vehicle-mounted device, etc. In addition, when it is a vehicle-to-everything (V2X) communication system, the terminal device may also be a vehicle-mounted device. It should be understood that the embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal.

It can be understood that the wireless communication system shown in Figures 1 and 2 is only for schematic illustration, and the wireless communication system may also include other network equipment, such as core network equipment, wireless relay equipment and wireless backhaul equipment, which are not drawn in Figures 1 and 2.

At present, the emergence of new Internet applications such as augmented reality (AR)/virtual reality (VR), vehicle-to-vehicle communication, etc. has put forward higher requirements for wireless communication technology, driving the continuous evolution of wireless communication technology to meet the needs of applications. At present, cellular mobile communication technology is in the evolution stage of the new generation of technology. An important feature of the new generation of technology is to support flexible configuration of multiple service types. Since different service types have different requirements for wireless communication technology, such as enhanced mobile broadband (eMBB) service requirements focus on large bandwidth, high speed, etc.; Ultra reliable low latency communication (URLLC) service requirements focus on high reliability and low latency; massive machine type communication (mMTC) service requirements focus on a large number of connections. Therefore, the new generation of wireless communication systems require flexible and configurable designs to support the transmission requirements of multiple service types.

However, the uncontrollability of the wireless transmission environment in wireless communication technology usually has a negative effect on communication efficiency, which is mainly reflected in the reduction of service quality. For example, the attenuation of signals in the wireless transmission environment limits the propagation distance of wireless signals, and the multipath effect also leads to fading. The reflection and refraction of large objects are the main uncontrollable factors. At present, it is considered to deploy large-scale antenna arrays on the surface of objects, such as intelligent metasurfaces (Reconfigurable Intelligent Surface, RIS). By precoding the antenna array, the reference signal incident on its surface is forwarded to a specific direction, thereby enhancing the signal strength at the receiving end and achieving control of the channel.

However, in the related technology, different algorithms need to be used to design the precoding matrix for the large-scale antenna array and network equipment respectively, which is too complicated. At the same time, due to the large size of the large-scale antenna array, the transmission distance of the signal is not much different from the size of the large-scale antenna array, and it is possible to work in an environment with a near-field assumption, resulting in the traditional precoding method based on the far-field assumption no longer being applicable.

Based on this, the embodiment of the present disclosure proposes a precoding method, which divides a large-scale antenna array into multiple array blocks, and determines the precoding matrix of each array block respectively, which reduces the complexity of precoding compared to the related art of precoding a large-scale antenna array as a whole. At the same time, the array block is used as the minimum reflection unit, so that the size of the array block is greatly different from the transmission distance of the signal, so that the far-field assumption is valid for a single array block.

Taking the wireless communication system shown in FIG1 as an example, FIG3 is a flow chart of a precoding method according to an exemplary embodiment. As shown in FIG3 , the precoding method is used in a first network device and includes the following steps.

In step S11, large-scale antenna array information of the second network device is obtained.

The large-scale antenna array information at least includes array block information.

In one implementation, the array block information indicates the number of array blocks included in the large-scale antenna array and the size and/or number of antennas of each array block.

In some embodiments, the large-scale antenna array information may also include arrangement information of the large-scale antenna array and location information of the reference signal.

The arrangement information of the large-scale antenna array indicates the number of antennas in the horizontal direction and the vertical direction in the large-scale antenna array information. The position information of the reference signal indicates the time-frequency position of the reference signal in the second network device.

In step S12, precoding matrix indication information is determined based on array block information included in the large-scale antenna array information.

The precoding matrix indication information is used by the second network device to determine the precoding matrix of one or more array blocks included in the large-scale antenna array.

In one implementation, different array blocks correspond to different precoding matrices or multiple array blocks correspond to the same precoding matrix.

In step S13, precoding matrix indication information is sent to the second network device.

In some embodiments, after the second network device receives the precoding matrix indication information, the second network device determines the precoding matrix of one or more array blocks included in the large-scale antenna array based on the precoding matrix indication information.

In an embodiment of the present disclosure, by acquiring large-scale antenna array information including array block information, precoding matrix indication information of one or more array blocks included in the large-scale antenna array is determined. After the precoding indication matrix information is sent to the second network device, the second network device can determine the precoding matrix of one or more array blocks based on the precoding matrix indication information. It can be seen that the embodiment of the present disclosure reduces the complexity of precoding by dividing the large-scale antenna array into multiple array blocks and determining the precoding matrix of each array block respectively, compared with the related art of precoding the large-scale antenna array as a whole. At the same time, the array block is used as the minimum reflection unit, so that the size of the array block is greatly different from the transmission distance of the signal, so that the far field assumption is valid for a single array block.

In a precoding method provided in an embodiment of the present disclosure, a first network device obtains large-scale antenna array information in the following manner: obtaining large-scale antenna array information reported by a second network device; or obtaining large-scale antenna array information stored offline by a core network device from a core network device.

In one implementation, the second network device directly reports the large-scale antenna array information to the first network device.

In another implementation, the core network device stores the large-scale antenna array information of the second network device, and the first network device obtains the large-scale antenna array information from the core network device offline.

For example, the core network equipment may be equipment with an operation administration and maintenance (OAM) system.

In a precoding method provided in an embodiment of the present disclosure, a first network device can determine precoding matrix indication information based on precoding matrix identifier (Precoding Matrix Indicator, PMI) information and incident angle information.

The PMI information is determined by the terminal and reported to the first network device. The incident angle information is determined by the first network device.

In one implementation, the terminal performs channel estimation based on a reference signal sent by the second network device, selects the most suitable precoding matrix from a codebook containing multiple precoding matrices based on the channel estimation result, and feeds back the precoding matrix to the first network device through PMI information.

In one implementation, the incident angle information indicates the incident angle generated when the first network device sends a signal to the second network device. Usually, the positions of the first network device and the second network device are fixed, so the incident angle information is known to the first network device and the second network device.

FIG4 is a flow chart showing a method of determining precoding matrix indication information according to an exemplary embodiment. As shown in FIG4 , the method includes the following steps.

In step S21, PMI information corresponding to reference signals in one or more array blocks reported by a terminal is received.

In one implementation, the terminal performs channel estimation on the reference signal sent by each array block, and determines PMI information corresponding to the reference signal in each array block.

In some embodiments, the PMI information includes a horizontal dimension PMI and a vertical dimension PMI.

In step S22, precoding matrix indication information is determined based on the PMI information and the incident angle information.

In some embodiments, the precoding matrix indication information includes: PMI and/or phase coefficient corresponding to the precoding matrix of one or more array blocks. After the precoding matrix indication information is sent to the second network device, the second network device determines the precoding matrix of each array block according to the PMI and/or phase coefficient corresponding to each array block.

In one implementation, the PMI corresponding to the array block may need to be phase adjusted, and the phase of the array block that needs to be adjusted is determined by a phase coefficient.

In some embodiments, the precoding matrix indication information includes: precoding matrices in one or more array blocks. After sending the precoding matrix indication information to the second network device, the second network device directly determines the precoding matrix of each array block according to the precoding matrix indication information.

The following describes, by way of an exemplary embodiment, how the first network device determines a precoding matrix for an array block.

Taking an array block of size M*N as an example, the horizontal dimension PMI and vertical dimension PMI corresponding to the reference signal in the array block reported by the receiving terminal are determined according to the horizontal dimension PMI and the vertical dimension PMI.

Among them, m ₁ represents the horizontal dimension PMI corresponding to the reference signal in the array block, m ₂ represents the vertical dimension PMI corresponding to the reference signal in the array block, a(m ₁ ) represents the angle vector that needs to be supplemented in the horizontal dimension determined based on the horizontal dimension PMI, a(m ₂ ) represents the angle vector that needs to be supplemented in the vertical dimension determined based on the vertical dimension PMI, O ₁ and O ₂ represent oversampling factors, and j represents the imaginary part.

Determine the corresponding angle vector based on the incident angle in the horizontal dimension and the incident angle in the vertical dimension:

Among them, _αh represents the incident angle in the horizontal dimension, _αv represents the incident angle in the vertical dimension, a( _αh ) represents the angle vector that needs to be supplemented in the horizontal dimension determined according to the incident angle in the horizontal dimension _, a( _αv ) represents the angle vector that needs to be supplemented in the vertical dimension determined according to the incident angle in the vertical dimension, _d1 represents the antenna spacing in the horizontal direction in the array block, _d2 represents the antenna spacing in the vertical direction in the array block, and j represents the imaginary part.

Then the angle vector that needs to be supplemented in the horizontal dimension of the array block is: a(γ _h )=a(m ₁ )⊙a(α _h ). Wherein, γ _h represents the angle that needs to be supplemented in the horizontal dimension of the array block, a(γ _h ) represents the angle vector that needs to be supplemented in the horizontal dimension of the array block, a(m ₁ ) represents the angle vector that needs to be supplemented in the horizontal dimension determined based on the horizontal dimension PMI, and a(α _h ) represents the angle vector that needs to be supplemented in the horizontal dimension determined based on the incident angle in the horizontal dimension.

The angle vector that needs to be supplemented in the vertical direction of the array block is: a(γ _v )=a(m ₂ )⊙a(α _v ). Wherein, γ _v represents the angle that needs to be supplemented in the vertical dimension of the array block, a(γ _v ) represents the angle vector that needs to be supplemented in the vertical dimension of the array block, a(m ₂ ) represents the angle vector that needs to be supplemented in the vertical dimension determined based on the vertical dimension PMI, and a(α _v ) represents the angle vector that needs to be supplemented in the vertical dimension determined based on the incident angle in the vertical dimension.

Furthermore, the precoding matrix of the array block is a(γ _v ) ^T ×a(γ _h ) _.

In an embodiment of the present disclosure, the first network device can determine the precoding matrix indication information corresponding to one or more array blocks respectively by receiving the PMI information corresponding to the reference signal in one or more array blocks reported by the terminal, and after sending the precoding indication matrix information to the second network device, the second network device can determine the precoding matrix of the one or more array blocks based on the precoding matrix indication information. It can be seen that the embodiment of the present disclosure reduces the complexity of precoding by dividing the large-scale antenna array into multiple array blocks and determining the precoding matrix of each array block respectively, compared with the related art of precoding based on the large-scale antenna array as a whole.

The following describes how to obtain the PMI information reported by the terminal.

Fig. 5 is a flow chart showing a method of determining PMI information according to an exemplary embodiment. As shown in Fig. 5 , the method includes the following steps.

In step S31, first configuration information of a reference signal is sent to a terminal, where the first configuration information is used by the terminal to determine PMI information corresponding to the reference signal in one or more array blocks.

In some embodiments, the first network device configures and activates the reference signal based on the reference signal position information included in the large-scale antenna array information, determines the first configuration information of the reference signal, and sends it to the terminal. After the terminal receives the first configuration information of the reference signal, it performs channel estimation on the reference signal in each array block and determines the PMI information corresponding to each array block.

In an embodiment of the present disclosure, by sending the first configuration information of the reference signal to the terminal, the terminal determines the PMI information corresponding to the reference signal in one or more array blocks based on the first configuration information of the reference signal, so that after the terminal reports the PMI information to the first network device, the first network device can determine the precoding matrix indication information of one or more blocks based on the PMI information, and after the first network device sends the precoding indication matrix information to the second network device, the second network device can determine the precoding matrix of one or more array blocks based on the precoding matrix indication information. It can be seen that the embodiment of the present disclosure reduces the complexity of precoding by dividing the large-scale antenna array into multiple array blocks and determining the precoding matrix of each array block respectively, compared with the related art of precoding based on the large-scale antenna array as a whole.

In a precoding method provided in an embodiment of the present disclosure, the first configuration information includes at least one of the following:

Array blocks corresponding to reference signals;

The time-frequency resources occupied by the reference signal;

Sequence information of the reference signal.

In a precoding method provided in an embodiment of the present disclosure, when the terminal performs channel estimation on the reference signal in each array block, it is also necessary to receive the reference signal sent by the second network device through the array block. Then the second network device first needs to determine the reference signal sent by each array block. Therefore, after the first network device configures and activates the reference signal based on the reference signal position information included in the large-scale antenna array information, it determines the second configuration information of the reference signal, and sends the second configuration information of the reference signal to the second network device, so that the second network device determines the reference signal sent by each array block based on the second configuration information. Based on this, an embodiment of the present disclosure also provides a flowchart for determining the reference signal sent by the array block, as shown in Figure 6, including the following steps:

In step S41, second configuration information of a reference signal is sent to a second network device, where the second configuration information is used by the second network device to determine a reference signal sent by one or more array blocks in a large-scale antenna array.

In the embodiment of the present disclosure, the second network device determines the reference signal sent by one or more array blocks based on the second configuration information, and sends the corresponding reference signal to the terminal based on the one or more array blocks. After receiving the reference signal, the terminal performs channel estimation on the reference signal based on the first configuration information of the reference signal, determines the PMI information corresponding to the reference signal sent by the array block, and reports the PMI information to the first network device, so that the first network device determines the precoding matrix indication information corresponding to the array block based on the PMI information.

In a precoding method provided in an embodiment of the present disclosure, when a terminal reports PMI information to a first network device, two modes of reporting PMI information by the terminal are provided.

In some embodiments, the PMI information corresponding to the reference signals in one or more array blocks reported by the receiving terminal at one time is received.

In some other embodiments, the PMI information corresponding to the reference signals in one or more array blocks reported by the terminal at one time is received.

In a precoding method provided by an embodiment of the present disclosure, the second network device is a RIS, and the large-scale antenna array is a RIS array.

Fig. 7 is a flow chart of a precoding method according to an exemplary embodiment. As shown in Fig. 7 , the precoding method is used in the second network device and includes the following steps.

In step S51, precoding matrix indication information sent by a first network device is received.

In step S52, based on the precoding matrix indication information, a precoding matrix of one or more array blocks included in the massive antenna array of the second network device is determined.

In one implementation, different array blocks correspond to different precoding matrices or multiple array blocks correspond to the same precoding matrix.

In an embodiment of the present disclosure, the second network device can determine the precoding matrix of one or more array blocks based on the precoding matrix indication information by receiving the precoding matrix indication information sent by the first network device. It can be seen that the embodiment of the present disclosure divides the large-scale antenna array into multiple array blocks and determines the precoding matrix of each array block respectively, which reduces the complexity of precoding compared to the related art of precoding the large-scale antenna array as a whole. At the same time, the array block is used as the minimum reflection unit, so that the size of the array block is greatly different from the transmission distance of the signal, so that the far field assumption is valid for a single array block.

In some embodiments, the precoding matrix indication information is determined by the first network device based on the PMI information and the incident angle information.

The PMI information is determined by the terminal and reported to the first network device. The incident angle information is determined by the first network device.

In one implementation, the terminal performs channel estimation based on a reference signal sent by the second network device, selects the most suitable precoding matrix from a codebook containing multiple precoding matrices based on the channel estimation result, and feeds back the precoding matrix to the first network device through PMI information.

In one implementation, the incident angle information indicates the incident angle generated when the first network device sends a signal to the second network device. Usually, the positions of the first network device and the second network device are fixed, so the incident angle information is known to the first network device and the second network device.

In a precoding method provided by an embodiment of the present disclosure, the precoding matrix indication information includes: PMI and/or phase coefficient corresponding to the precoding matrix of one or more array blocks; or the precoding matrix in one or more array blocks.

In one embodiment, in response to the precoding matrix indication information including: PMI and/or phase coefficient corresponding to the precoding matrix of one or more array blocks. After sending the precoding matrix indication information to the second network device, the second network device determines the precoding matrix of each array block according to the PMI and/or phase coefficient corresponding to each array block.

Since the PMI corresponding to the array block needs to be phase adjusted, the phase of the array block that needs to be adjusted can be determined by the phase coefficient.

In another embodiment, the response to the precoding matrix indication information includes: precoding matrices in one or more array blocks. After sending the precoding matrix indication information to the second network device, the second network device directly determines the precoding matrix of each array block according to the precoding matrix indication information.

In a precoding method provided by an embodiment of the present disclosure, since the second network device can determine the precoding matrix of one or more array blocks included in the large-scale antenna array based on the precoding matrix indication information, when the first network device determines the precoding matrix indication information, the first network device needs to know the array block information of one or more array blocks included in the large-scale antenna array of the second network device.

In some embodiments, the second network device sends the large-scale antenna array information including the array block information to the first network device; or, the first network device obtains offline from a core network device storing the large-scale antenna array information including the array block information.

Based on this, an embodiment of the present disclosure further provides a method for sending large-scale antenna array information, as shown in FIG8 , comprising the following steps:

In step S61, large-scale antenna array information is sent to a first network device.

The large-scale antenna array information at least includes array block information, and the array block information is used by the first network device to determine precoding matrix indication information.

In one implementation, the array block information indicates the number of array blocks included in the large-scale antenna array and the size and/or number of antennas of each array block.

In some embodiments, the large-scale antenna array information may also include arrangement information of the large-scale antenna array and location information of the reference signal.

The arrangement information of the large-scale antenna array indicates the number of antennas in the horizontal direction and the vertical direction in the large-scale antenna array information, respectively. The position information of the reference signal indicates the time-frequency position of the reference signal in the second network device.

In the disclosed embodiment, by dividing the large-scale antenna array information into multiple array blocks, the first network device can determine the corresponding precoding matrix indication information for the multiple array blocks respectively, which reduces the complexity of precoding compared to the related art of precoding the large-scale antenna array as a whole. At the same time, the array block is used as the minimum reflection unit, so that the size of the array block is greatly different from the transmission distance of the signal, so that the far field assumption is valid for a single array block.

In a precoding method provided in an embodiment of the present disclosure, after a first network device receives large-scale antenna array information, the first network device can configure and activate the reference signal based on the reference signal position information included in the large-scale antenna array information, and determine the second configuration information of the reference signal. After sending the second configuration information of the reference signal to the second network device, the second network device can determine the reference signal sent by each array block based on the second configuration information, thereby sending the corresponding reference signal to the terminal through the array block. After receiving the reference signal sent by the array block, the terminal performs channel estimation on the reference signal in the array block and determines the PMI information corresponding to the array block. Thus, the terminal can report the PMI information to the first network device so that the first network device determines the precoding matrix indication information corresponding to the array block based on the PMI information.

Based on this, an embodiment of the present disclosure further provides a method for determining a reference signal sent by an array block, as shown in FIG9 , comprising the following steps:

In step S71, second configuration information of reference signals to be sent by one or more array blocks is obtained.

In step S72, based on the second configuration information, reference signals sent by one or more array blocks are determined.

In step S73, a reference signal is sent to the terminal based on one or more array blocks, so that the terminal determines PMI information corresponding to the reference signal sent by the one or more array blocks.

In the embodiment of the present disclosure, the second network device sends a reference signal to the terminal based on one or more array blocks so that the terminal can perform channel estimation on the reference signal and determine the PMI information corresponding to each array block. Compared with the related art of precoding based on a large-scale antenna array as a whole, the complexity of precoding is reduced. At the same time, the array block is used as the minimum reflection unit, so that the size of the array block is greatly different from the transmission distance of the signal, so that the far field assumption is valid for a single array block.

In a precoding method provided in an embodiment of the present disclosure, when the second network device obtains the second configuration information of the reference signal to be sent by one or more array blocks, it can determine the second configuration information of the reference signal by receiving the signaling sent by the first network device, and can also obtain the second configuration information of the reference signal stored offline by the core network device from the core network device.

The core network device may be a device having an OAM system.

In a precoding method provided by an embodiment of the present disclosure, the second network device is a RIS, and the large-scale antenna array is a RIS array.

Fig. 10 is a flow chart of a precoding method according to an exemplary embodiment. As shown in Fig. 10 , the precoding method is used in a terminal and includes the following steps.

In step S81, precoding matrix identifier PMI information corresponding to reference signals in one or more array blocks included in a large-scale antenna array of a second network device is determined.

In one implementation, the terminal performs channel estimation according to a reference signal sent by the second network device, selects the most suitable precoding matrix from a codebook containing multiple precoding matrices according to the channel estimation result, and determines PMI information through the precoding matrix.

In step S82, PMI information corresponding to the reference signal in one or more array blocks is sent to the first network device.

The PMI information is used by the first network device to determine precoding matrix indication information, and the precoding matrix indication information is used by the second network device to determine the precoding matrix of one or more array blocks included in the large-scale antenna array.

In some embodiments, the precoding matrix indication information is determined by the first network device based on the PMI information and the incident angle information.

The PMI information is determined by the terminal and reported to the first network device. The incident angle information is determined by the first network device.

In one implementation, the terminal performs channel estimation based on a reference signal sent by the second network device, selects the most suitable precoding matrix from a codebook containing multiple precoding matrices based on the channel estimation result, and feeds back to the first network device through PMI information. The incident angle information represents the incident angle generated when the first network device sends a signal to the second network device. Usually, the positions of the first network device and the second network device are fixed, so the incident angle information is known to the first network device and the second network device.

In some embodiments, the precoding matrix indication information may include: PMI and/or phase coefficient corresponding to the precoding matrix of one or more array blocks; or precoding matrix in one or more array blocks.

In one embodiment, in response to the precoding matrix indication information including: PMI and/or phase coefficient corresponding to the precoding matrix of one or more array blocks. After the first network device sends the precoding matrix indication information to the second network device, the second network device determines the precoding matrix of each array block according to the PMI and/or phase coefficient corresponding to each array block.

Since the PMI corresponding to the array block needs to be phase adjusted, the phase of the array block that needs to be adjusted can be determined by the phase coefficient.

In another embodiment, the response to the precoding matrix indication information includes: precoding matrices in one or more array blocks. After the first network device sends the precoding matrix indication information to the second network device, the second network device directly determines the precoding matrix of each array block according to the precoding matrix indication information.

In an embodiment of the present disclosure, the terminal is able to determine the PMI information corresponding to the reference signal in one or more array blocks included in the large-scale antenna array of the second network device. After sending the PMI information corresponding to the reference signal in one or more array blocks to the first network device, the first network device is able to determine the precoding matrix indication information of the one or more array blocks based on the PMI information. It can be seen that the embodiment of the present disclosure reduces the complexity of precoding by dividing the large-scale antenna array into multiple array blocks and separately determining the precoding matrix indication information of each array block compared to the related art in which the large-scale antenna array is precoded as a whole. At the same time, the array block is used as the minimum reflection unit, so that the size of the array block is greatly different from the transmission distance of the signal, so that the far-field assumption is valid for a single array block.

In a precoding method provided in an embodiment of the present disclosure, when a terminal determines the PMI information corresponding to a reference signal in one or more array blocks, it is necessary to obtain the configuration information of the reference signal and determine the correspondence between the reference signal and the array block, thereby performing channel estimation on the reference signal in each array block and determining the PMI information corresponding to each array block.

Based on this, an embodiment of the present disclosure further provides a method for determining PMI information, as shown in FIG11 , comprising the following steps:

In step S91, first configuration information of a reference signal sent by a first network device is received.

The first configuration information is determined by the first network device by configuring and activating the reference signal based on the reference signal position information included in the large-scale antenna array information.

In step S92, PMI information corresponding to reference signals in one or more array blocks is determined based on the first configuration information.

In some embodiments, the first configuration information includes at least one of the following:

Array blocks corresponding to reference signals;

The time-frequency resources occupied by the reference signal;

Sequence information of the reference signal.

In an embodiment of the present disclosure, by sending the first configuration information of the reference signal to the terminal, the terminal determines the PMI information corresponding to the reference signal in one or more array blocks based on the first configuration information of the reference signal, so that after the terminal reports the PMI information to the first network device, the first network device can determine the precoding matrix indication information of one or more blocks based on the PMI information, and after the first network device sends the precoding indication matrix information to the second network device, the second network device can determine the precoding matrix of one or more array blocks based on the precoding matrix indication information. It can be seen that the embodiment of the present disclosure reduces the complexity of precoding by dividing the large-scale antenna array into multiple array blocks and determining the precoding matrix of each array block respectively, compared with the related art of precoding based on the large-scale antenna array as a whole.

In a precoding method provided in an embodiment of the present disclosure, when a terminal performs channel estimation on a reference signal in each array block, it is also necessary to receive a reference signal sent by a second network device through the array block, further perform channel estimation on the received reference signal, and determine the corresponding PMI information. Based on this, an embodiment of the present disclosure also provides a method for determining a reference signal sent by an array block, as shown in FIG12, comprising the following steps:

In step S1001, a reference signal sent by one or more array blocks in a large-scale antenna array of a second network device is received.

Among them, the second network device determines the reference signal sent by one or more array blocks based on the second configuration information of the reference signal, and sends the corresponding reference signal to the terminal based on the one or more array blocks.

In step S1002, based on the first configuration information, channel estimation is performed on reference signals sent by one or more array blocks to determine PMI information corresponding to the reference signals in the one or more array blocks.

In the embodiment of the present disclosure, the second network device sends a reference signal to the terminal based on one or more array blocks so that the terminal can perform channel estimation on the reference signal and determine the PMI information corresponding to each array block. Compared with the related art of precoding based on a large-scale antenna array as a whole, the complexity of precoding is reduced. At the same time, the array block is used as the minimum reflection unit, so that the size of the array block is greatly different from the transmission distance of the signal, so that the far field assumption is valid for a single array block.

In a precoding method provided in an embodiment of the present disclosure, when a terminal reports PMI information to a first network device, two modes of reporting PMI information by the terminal are provided.

In some embodiments, PMI information corresponding to reference signals in one or more array blocks is reported to the first network device at one time.

In some other embodiments, PMI information corresponding to reference signals in one or more array blocks is reported to the first network device multiple times.

The PMI information reported each time in the multiple times includes PMI information corresponding to the reference signals in one or more array blocks.

In a precoding method provided by an embodiment of the present disclosure, the second network device is a RIS, and the large-scale antenna array is a RIS array.

In order to more clearly illustrate a precoding method provided by an embodiment of the present disclosure, the precoding method provided by an embodiment of the present disclosure is described in an interactive form as shown in FIG13:

The first network device obtains the large-scale antenna array information, and configures the reference signal based on the large-scale antenna array information to determine the first configuration information and the second configuration information of the reference signal. The large-scale antenna array information includes at least the block information of the array block. The first network device can receive the large-scale antenna array information sent by the second network, or obtain the large-scale antenna array information stored by the core network device from the core network device.

The first configuration information of the reference signal is sent to the terminal, and the second configuration information of the reference signal is sent to the second network device or stored in the core network device. After the second network device obtains the second configuration information of the reference signal from the first network device or the core network device, the reference signal sent by one or more array blocks is determined based on the second configuration information, and the reference signal is sent to the terminal based on the one or more array blocks. After the terminal receives the first configuration information and the reference signal sent by one or more array blocks, channel estimation is performed on the reference signal of one or more array blocks, and the PMI information corresponding to the reference signal of one or more array blocks is measured and determined. And the PMI information corresponding to the reference signal of one or more array blocks is sent to the first network device, and the first network device determines the precoding indication information of one or more blocks according to the received PMI information and the incident angle information, and sends the precoding indication information to the second network device. After receiving the precoding indication information, the second network device determines the precoding matrices corresponding to the one or more array blocks based on the precoding indication information, and configures the corresponding antenna ports based on the precoding matrices corresponding to the one or more array blocks, and then forwards the signal.

In some embodiments, when the large-scale antenna array is a RIS array of RIS, the signal may be reflected and/or transmitted.

In the embodiments of the present disclosure, by dividing the large-scale antenna array into multiple array blocks, the precoding matrix of each array block is determined respectively, which reduces the complexity of precoding compared with the related art that precodes the large-scale antenna array as a whole. At the same time, the array block is used as the minimum reflection unit, so that the size of the array block is greatly different from the transmission distance of the signal, so that the far-field assumption is valid for a single array block.

Taking the wireless communication system shown in FIG. 2 as an example, FIG. 14 is a flowchart of a precoding method according to an exemplary embodiment. As shown in FIG. 14 , the precoding method is used in a first network device and includes the following steps.

In step S1101, large-scale antenna array information is determined.

The large-scale antenna array information at least includes array block information.

In one implementation, the array block information indicates the number of array blocks included in the large-scale antenna array and the size and/or number of antennas of each array block.

In some embodiments, the large-scale antenna array information may also include arrangement information of the large-scale antenna array and location information of the reference signal.

The arrangement information of the large-scale antenna array indicates the number of antennas in the horizontal direction and the vertical direction in the large-scale antenna array information, respectively. The position information of the reference signal indicates the time-frequency position of the reference signal in the first network device.

In step S1102, precoding matrix indication information is determined based on array block information included in the large-scale antenna array information.

In one implementation, different array blocks correspond to different precoding matrices or multiple array blocks correspond to the same precoding matrix.

In step S1103, based on the precoding matrix indication information, a precoding matrix of one or more array blocks included in the massive antenna array is determined.

In the embodiment of the present disclosure, the first network device can determine the precoding matrix indication information of one or more array blocks in the large-scale antenna array, so as to determine the precoding matrix of one or more array blocks included in the large-scale antenna array, which reduces the complexity of precoding compared to the large-scale antenna array as a whole in the related art. At the same time, the array block is used as the minimum reflection unit, so that the size of the array block is greatly different from the transmission distance of the signal, so that the far field assumption is valid for a single array block.

In a precoding method provided in an embodiment of the present disclosure, a first network device can determine precoding matrix indication information based on precoding matrix identifier (Precoding Matrix Indicator, PMI) information and incident angle information.

The PMI information is determined by the terminal and reported to the first network device. The incident angle information is determined by the first network device.

In one implementation, the terminal performs channel estimation according to a reference signal sent by the first network device, selects the most suitable precoding matrix from a codebook containing multiple precoding matrices according to the channel estimation result, and feeds back the precoding matrix to the first network device through PMI information.

In one implementation, the incident angle information indicates the incident angle generated when the first network device sends a signal to the large-scale antenna array. Usually, the positions of the first network device and the large-scale antenna array are fixed, so the incident angle information is known to the first network device and the large-scale antenna array.

FIG15 is a flowchart of determining precoding matrix indication information according to an exemplary embodiment. As shown in FIG15 , the method includes the following steps.

In step S1201, PMI information corresponding to reference signals in one or more array blocks reported by a terminal is received.

In one implementation, the terminal performs channel estimation on the reference signal sent by each array block, and determines PMI information corresponding to the reference signal in each array block.

In some embodiments, the PMI information includes a horizontal dimension PMI and a vertical dimension PMI.

In step S1202, precoding matrix indication information is determined based on the PMI information and the incident angle information.

In some embodiments, the precoding matrix indication information includes: PMI and/or phase coefficient corresponding to the precoding matrix of one or more array blocks. The first network device can determine the precoding matrix of each array block according to the PMI and/or phase coefficient corresponding to each array block.

In one implementation, the PMI corresponding to the array block may need to be phase adjusted, and the phase of the array block that needs to be adjusted is determined by a phase coefficient.

In some embodiments, the precoding matrix indication information includes: precoding matrices in one or more array blocks. After the precoding matrix indication information is sent to the second network device, the second network device directly determines the precoding matrix of each array block according to the precoding matrix indication information.

The following describes, by way of an exemplary embodiment, how the first network device determines a precoding matrix for an array block.

Taking an array block of size M*N as an example, the horizontal dimension PMI and vertical dimension PMI corresponding to the reference signal in the array block reported by the receiving terminal are determined according to the horizontal dimension PMI and the vertical dimension PMI.

Among them, m ₁ represents the horizontal dimension PMI corresponding to the reference signal in the array block, m ₂ represents the vertical dimension PMI corresponding to the reference signal in the array block, a(m ₁ ) represents the angle vector that needs to be supplemented in the horizontal dimension determined based on the horizontal dimension PMI, a(m ₂ ) represents the angle vector that needs to be supplemented in the vertical dimension determined based on the vertical dimension PMI, O ₁ and O ₂ represent oversampling factors, and j represents the imaginary part.

Determine the corresponding angle vector based on the incident angle in the horizontal dimension and the incident angle in the vertical dimension:

Among them, _αh represents the incident angle in the horizontal dimension, _αv represents the incident angle in the vertical dimension, a( _αh ) represents the angle vector that needs to be supplemented in the horizontal dimension determined according to the incident angle in the horizontal dimension _, a( _αv ) represents the angle vector that needs to be supplemented in the vertical dimension determined according to the incident angle in the vertical dimension, _d1 represents the antenna spacing in the horizontal direction in the array block, _d2 represents the antenna spacing in the vertical direction in the array block, and j represents the imaginary part.

Then the angle vector that needs to be supplemented in the horizontal dimension of the array block is: a(γ _h )=a(m ₁ )⊙a(α _h ). Wherein, γ _h represents the angle that needs to be supplemented in the horizontal dimension of the array block, a(γ _h ) represents the angle vector that needs to be supplemented in the horizontal dimension of the array block, a(m ₁ ) represents the angle vector that needs to be supplemented in the horizontal dimension determined based on the horizontal dimension PMI, and a(α _h ) represents the angle vector that needs to be supplemented in the horizontal dimension determined based on the incident angle in the horizontal dimension.

The angle vector that needs to be supplemented in the vertical direction of the array block is: a(γ _v )=a(m ₂ )⊙a(α _v ). Wherein, γ _v represents the angle that needs to be supplemented in the vertical dimension of the array block, a(γ _v ) represents the angle vector that needs to be supplemented in the vertical dimension of the array block, a(m ₂ ) represents the angle vector that needs to be supplemented in the vertical dimension determined based on the vertical dimension PMI, and a(α _v ) represents the angle vector that needs to be supplemented in the vertical dimension determined based on the incident angle in the vertical dimension.

Furthermore, the precoding matrix of the array block is a(γ _v ) ^T ×a(γ _h ) _.

In the embodiment of the present disclosure, the first network device can determine the precoding matrix indication information corresponding to the one or more array blocks respectively by receiving the PMI information corresponding to the reference signal in the one or more array blocks reported by the terminal, and then determine the precoding matrix of the one or more array blocks based on the precoding matrix indication information. It can be seen that the embodiment of the present disclosure reduces the complexity of precoding by dividing the large-scale antenna array into multiple array blocks and determining the precoding matrix of each array block respectively, compared with the related art of precoding the large-scale antenna array as a whole.

In a precoding method provided in an embodiment of the present disclosure, the first configuration information includes at least one of the following:

Array blocks corresponding to reference signals;

The time-frequency resources occupied by the reference signal;

Sequence information of the reference signal.

In a precoding method provided in an embodiment of the present disclosure, when the terminal performs channel estimation on the reference signal in each array block, it is also necessary to receive the reference signal sent by the first network device through the array block. Then the first network device first needs to determine the reference signal sent by each array block. Therefore, after the first network device configures and activates the reference signal based on the reference signal position information included in the large-scale antenna array information, it determines the second configuration information of the reference signal, and determines the reference signal sent by each array block based on the second configuration information. Based on this, an embodiment of the present disclosure also provides a flowchart for determining the reference signal sent by the array block, as shown in Figure 16, including the following steps:

In step S1301, second configuration information of reference signals to be sent by one or more arrays is determined.

In step S1302, based on the second configuration information, a reference signal sent by one or more array blocks is determined.

In step S1303, a reference signal is sent to the terminal based on one or more array blocks, so that the terminal determines PMI information corresponding to the reference signal sent by the one or more array blocks.

In the embodiment of the present disclosure, the first network device sends a reference signal to the terminal based on one or more array blocks so that the terminal can perform channel estimation on the reference signal and determine the PMI information corresponding to each array block. Compared with the related art of precoding based on a large-scale antenna array as a whole, the complexity of precoding is reduced. At the same time, the array block is used as the minimum reflection unit, so that the size of the array block is greatly different from the transmission distance of the signal, so that the far field assumption is valid for a single array block.

In a precoding method provided in an embodiment of the present disclosure, when a terminal reports PMI information to a first network device, two modes of reporting PMI information by the terminal are provided.

In some embodiments, the PMI information corresponding to the reference signals in one or more array blocks reported by the receiving terminal at one time is received.

In some other embodiments, the PMI information corresponding to the reference signals in one or more array blocks reported by the terminal at one time is received.

In a precoding method provided by an embodiment of the present disclosure, the large-scale antenna array is a RIS array.

FIG. 17 is a flowchart of a precoding method according to an exemplary embodiment. As shown in FIG. 17 , the precoding method is used in a terminal and includes the following steps.

In step S1401, PMI information corresponding to reference signals in one or more array blocks included in a large-scale antenna array of a first network device is determined.

In one implementation, the terminal performs channel estimation according to a reference signal sent by the first network device, selects the most suitable precoding matrix from a codebook containing multiple precoding matrices according to the channel estimation result, and determines PMI information through the precoding matrix.

In step S1402, PMI information corresponding to reference signals in one or more array blocks is sent to a first network device.

The PMI information is used by the first network device to determine precoding matrix indication information, and the precoding matrix indication information is used by the first network device to determine precoding matrices of one or more array blocks included in the large-scale antenna array.

In some embodiments, the precoding matrix indication information is determined by the first network device based on the PMI information and the incident angle information.

The PMI information is determined by the terminal and reported to the first network device. The incident angle information is determined by the first network device.

In one implementation, the terminal performs channel estimation based on a reference signal sent by the first network device, selects the most suitable precoding matrix from a codebook containing multiple precoding matrices based on the channel estimation result, and feeds back to the first network device through PMI information. The incident angle information represents the incident angle generated when the first network device sends a signal to the large-scale antenna array. Usually, the positions of the first network device and the large-scale antenna array are fixed, so the incident angle information is known to the first network device and the large-scale antenna array.

In some embodiments, the precoding matrix indication information may include: PMI and/or phase coefficient corresponding to the precoding matrix of one or more array blocks; or precoding matrix in one or more array blocks.

In one implementation, the precoding matrix indication information includes: PMI and/or phase coefficient corresponding to the precoding matrix of one or more array blocks. Since the PMI corresponding to the array block needs to be phase adjusted, the phase that needs to be adjusted for the array block can be determined by the phase coefficient.

In an embodiment of the present disclosure, the terminal is able to determine the PMI information corresponding to the reference signal in one or more array blocks included in the large-scale antenna array of the first network device. After sending the PMI information corresponding to the reference signal in one or more array blocks to the first network device, the first network device is able to determine the precoding matrix indication information of the one or more array blocks based on the PMI information. It can be seen that the embodiment of the present disclosure reduces the complexity of precoding by dividing the large-scale antenna array into multiple array blocks and separately determining the precoding matrix indication information of each array block compared to the related art of precoding the large-scale antenna array as a whole. At the same time, the array block is used as the minimum reflection unit, so that the size of the array block is greatly different from the transmission distance of the signal, so that the far field assumption is valid for a single array block.

In a precoding method provided in an embodiment of the present disclosure, when a terminal determines the PMI information corresponding to a reference signal in one or more array blocks, it needs to obtain the configuration information of the reference signal and determine the correspondence between the reference signal and the array block, thereby performing channel estimation on the reference signal in each array block and determining the PMI information corresponding to each array block.

Based on this, an embodiment of the present disclosure further provides a method for determining PMI information, as shown in FIG18 , comprising the following steps:

In step S1501, first configuration information of a reference signal sent by a first network device is received.

The first configuration information is determined by the first network device by configuring and activating the reference signal based on the reference signal position information included in the large-scale antenna array information.

In step S1502, PMI information corresponding to reference signals in one or more array blocks is determined based on first configuration information.

In some embodiments, the first configuration information includes at least one of the following:

Array blocks corresponding to reference signals;

The time-frequency resources occupied by the reference signal;

Sequence information of the reference signal.

In an embodiment of the present disclosure, by sending the first configuration information of the reference signal to the terminal, the terminal determines the PMI information corresponding to the reference signal in one or more array blocks based on the first configuration information of the reference signal, so that after the terminal reports the PMI information to the first network device, the first network device can determine the precoding matrix indication information of one or more blocks based on the PMI information, and then determine the precoding matrix of one or more array blocks based on the precoding matrix indication information. It can be seen that the embodiment of the present disclosure reduces the complexity of precoding by dividing the large-scale antenna array into multiple array blocks and determining the precoding matrix of each array block respectively, compared with the related art of precoding based on the large-scale antenna array as a whole.

In a precoding method provided in an embodiment of the present disclosure, when a terminal performs channel estimation on a reference signal in each array block, it is also necessary to receive a reference signal sent by a first network device through the array block, further perform channel estimation on the received reference signal, and determine the corresponding PMI information. Based on this, an embodiment of the present disclosure also provides a method for determining a reference signal sent by an array block, as shown in FIG19, comprising the following steps:

In step S1601, a reference signal sent by one or more array blocks in a large-scale antenna array of a first network device is received.

The first network device determines the reference signal sent by one or more array blocks based on the second configuration information of the reference signal, and sends the corresponding reference signal to the terminal based on the one or more array blocks.

In step S1602, based on the first configuration information, channel estimation is performed on reference signals sent by one or more array blocks to determine PMI information corresponding to the reference signals in the one or more array blocks.

In the embodiment of the present disclosure, the first network device sends a reference signal to the terminal based on one or more array blocks, so that the terminal can perform channel estimation on the reference signal and determine the PMI information corresponding to each array block. Compared with the related art that precodes the large-scale antenna array as a whole, the complexity of precoding is reduced. At the same time, the array block is used as the minimum reflection unit, so that the size of the array block is greatly different from the transmission distance of the signal, so that the far field assumption is valid for a single array block.

In a precoding method provided in an embodiment of the present disclosure, when a terminal reports PMI information to a first network device, two modes of reporting PMI information by the terminal are provided.

In some embodiments, PMI information corresponding to reference signals in one or more array blocks is reported to the first network device at one time.

In some other embodiments, PMI information corresponding to reference signals in one or more array blocks is reported to the first network device multiple times.

The PMI information reported each time in the multiple times includes PMI information corresponding to the reference signals in one or more array blocks.

In a precoding method provided by an embodiment of the present disclosure, the large-scale antenna array is a RIS array.

In order to more clearly illustrate a precoding method provided by an embodiment of the present disclosure, the precoding method provided by an embodiment of the present disclosure is described in an interactive form as shown in FIG20:

The first network device obtains large-scale antenna array information, configures the reference signal based on the large-scale antenna array information, and determines the first configuration information and the second configuration information of the reference signal. Among them, the large-scale antenna array information includes at least the block information of the array block. The first configuration information of the reference signal is sent to the terminal, and based on the second configuration information, the reference signal sent by one or more array blocks is determined, and the reference signal is sent to the terminal based on one or more array blocks. After the terminal receives the first configuration information and the reference signal sent by one or more array blocks, the channel estimation is performed on the reference signal of one or more array blocks, and the PMI information corresponding to the reference signal of one or more array blocks is measured and determined. And the PMI information corresponding to the reference signal of one or more array blocks is sent to the first network device, and the first network device determines the precoding indication information of one or more blocks according to the received PMI information and the incident angle information, thereby determining the precoding matrix corresponding to one or more array blocks based on the precoding indication information, and configuring the corresponding antenna ports based on the precoding matrix corresponding to one or more array blocks, and then forwarding the signal.

In some embodiments, when the massive antenna array is a RIS array, the signal may be reflected and/or transmitted.

In the embodiments of the present disclosure, by dividing the large-scale antenna array into multiple array blocks, the precoding matrix of each array block is determined respectively, which reduces the complexity of precoding compared with the related art that precoding is performed on the large-scale antenna array as a whole. At the same time, the array block is used as the minimum reflection unit, so that the size of the array block is greatly different from the transmission distance of the signal, so that the far-field assumption is valid for a single array block.

It should be noted that those skilled in the art can understand that the various implementation methods/embodiments involved in the embodiments of the present disclosure can be used in conjunction with the aforementioned embodiments or can be used independently. Whether used alone or in conjunction with the aforementioned embodiments, the implementation principle is similar. In the implementation of the present disclosure, some embodiments are described by using implementation methods used together. Of course, those skilled in the art can understand that such examples are not limitations of the embodiments of the present disclosure.

Based on the same concept, an embodiment of the present disclosure also provides a precoding device.

It is understandable that the precoding device provided in the embodiment of the present disclosure includes hardware structures and/or software modules corresponding to the execution of each function in order to realize the above functions. In combination with the units and algorithm steps of each example disclosed in the embodiment of the present disclosure, the embodiment of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiment of the present disclosure.

Fig. 21 is a block diagram of a precoding device according to an exemplary embodiment. Referring to Fig. 21 , the device 100 includes an acquisition module 101 , a determination module 102 and a sending module 103 .

The acquisition module 101 is configured to acquire large-scale antenna array information of the second network device, where the large-scale antenna array information at least includes array block information;

The determination module 102 is configured to determine precoding matrix indication information based on array block information included in the large-scale antenna array information, where the precoding matrix indication information is used by the second network device to determine precoding matrices of one or more array blocks included in the large-scale antenna array;

The sending module 103 is configured to send precoding matrix indication information to the second network device.

In one embodiment, the apparatus 100 further includes a receiving module 104. The receiving module 104 is configured to receive precoding matrix identification PMI information corresponding to the reference signal in one or more array blocks reported by the terminal; and the determining module 102 is configured to determine the precoding matrix indication information based on the PMI information and the incident angle information.

In one implementation, the sending module 103 is configured to send first configuration information of a reference signal to a terminal, where the first configuration information is used by the terminal to determine PMI information corresponding to the reference signal in one or more array blocks.

In one implementation, the first configuration information includes at least one of the following:

Array blocks corresponding to reference signals;

The time-frequency resources occupied by the reference signal;

Sequence information of the reference signal.

In one implementation, the receiving module 104 is configured to receive PMI information corresponding to reference signals in one or more array blocks reported by the terminal once; or is configured to receive PMI information corresponding to reference signals in one or more array blocks reported by the terminal multiple times, wherein the PMI information reported each time in the multiple times includes the PMI information corresponding to the reference signals in the one or more array blocks.

In one implementation, the sending module 103 is configured to send second configuration information of a reference signal to a second network device, where the second configuration information is used by the second network device to determine a reference signal sent by one or more array blocks in a large-scale antenna array.

In one implementation, the precoding matrix indication information includes: a precoding matrix identifier PMI and/or a phase coefficient corresponding to a precoding matrix of one or more array blocks; or a precoding matrix in one or more array blocks.

In one implementation, the acquisition module 101 is configured to acquire the large-scale antenna array information reported by the second network device; or acquire the large-scale antenna array information stored offline by the core network device from the core network device.

In one embodiment, the large-scale antenna array includes a RIS array of a smart metasurface RIS.

Fig. 22 is a block diagram of a precoding device according to an exemplary embodiment. Referring to Fig. 22 , the device 200 includes a receiving module 201 and a determining module 202 .

The receiving module 201 is configured to receive precoding matrix indication information sent by the first network device;

The determination module 202 is configured to determine, based on the precoding matrix indication information, a precoding matrix of one or more array blocks included in the massive antenna array of the second network device.

In one implementation, the apparatus 200 further includes a sending module 203. The sending module 203 is configured to send large-scale antenna array information to the first network device, where the large-scale antenna array information includes at least array block information, and the array block information is used by the first network device to determine precoding matrix indication information.

In one implementation, the apparatus 200 further includes an acquisition module 204. The acquisition module 204 is configured to acquire second configuration information of a reference signal to be sent by one or more array blocks; the determination module 202 is configured to determine the reference signal sent by one or more array blocks based on the second configuration information; and the sending module 203 is configured to send the reference signal to the terminal based on the one or more array blocks, so that the terminal determines the PMI information corresponding to the reference signal sent by the one or more array blocks.

In one implementation, the acquisition module 204 is configured to receive second configuration information of the reference signal sent by the first network device; or to acquire, from the core network device, the second configuration information of the reference signal stored offline by the core network device.

In one implementation, the precoding matrix indication information includes: a precoding matrix identifier PMI and/or a phase coefficient corresponding to the precoding matrix of the one or more array blocks; or a precoding matrix in one or more array blocks.

In one embodiment, the large-scale antenna array includes a RIS array of a smart metasurface RIS.

Fig. 23 is a block diagram of a precoding device according to an exemplary embodiment. Referring to Fig. 23 , the device 300 includes a determination module 301 and a sending module 302 .

The determination module 301 is configured to determine precoding matrix identifier PMI information corresponding to reference signals in one or more array blocks included in the large-scale antenna array of the second network device;

The sending module 302 is configured to send PMI information corresponding to the reference signal in one or more array blocks to the first network device, the PMI information is used by the first network device to determine the precoding matrix indication information, and the precoding matrix indication information is used by the second network device to determine the precoding matrix of one or more array blocks included in the large-scale antenna array.

In one implementation, the apparatus 300 further includes a receiving module 303. The receiving module 303 is configured to receive first configuration information of a reference signal sent by a first network device, and determine PMI information corresponding to the reference signal in one or more array blocks based on the first configuration information.

In one implementation, the first configuration information includes at least one of the following:

Array blocks corresponding to reference signals;

The time-frequency resources occupied by the reference signal;

Sequence information of the reference signal.

In one implementation, the receiving module 303 is configured to receive a reference signal sent by one or more array blocks in a large-scale antenna array of a second network device;

The determination module 301 is configured to perform channel estimation on reference signals sent by one or more array blocks based on first configuration information, and determine PMI information corresponding to the reference signals in one or more array blocks.

In one implementation, the sending module 302 is configured to report PMI information corresponding to the reference signals in one or more array blocks to the first network device at one time; or

The PMI information corresponding to the reference signals in the one or more array blocks is reported to the first network device multiple times, wherein the PMI information reported each time includes the PMI information corresponding to the reference signals in the one or more array blocks.

In one embodiment, the large-scale antenna array includes a RIS array of a smart metasurface RIS.

Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

Fig. 24 is a block diagram of a precoding device according to an exemplary embodiment. Referring to Fig. 24 , the device 400 includes a determination module 401 .

The determination module 401 is configured to determine large-scale antenna array information, which includes at least array block information; determine precoding matrix indication information based on the array block information included in the large-scale antenna array information; and determine the precoding matrix of one or more array blocks included in the large-scale antenna array based on the precoding matrix indication information.

In one implementation, the apparatus 400 further includes a receiving module 402. The receiving module 402 is configured to receive precoding matrix identifier PMI information corresponding to reference signals in one or more array blocks reported by the terminal;

The determination module 401 is configured to determine precoding matrix indication information based on PMI information and incident angle information.

In one implementation, the apparatus 400 further includes a sending module 403. The sending module 403 is configured to send first configuration information of a reference signal to the terminal, where the first configuration information is used by the terminal to determine PMI information corresponding to the reference signal in one or more array blocks.

In one implementation, the first configuration information includes at least one of the following:

Array blocks corresponding to reference signals;

The time-frequency resources occupied by the reference signal;

Sequence information of the reference signal.

In one implementation, the receiving module 402 is configured to receive PMI information corresponding to a reference signal in one or more array blocks reported by the terminal once; or receive PMI information corresponding to a reference signal in one or more array blocks reported by the terminal multiple times, wherein the PMI information reported each time in the multiple times includes the PMI information corresponding to the reference signal in one or more array blocks.

In one implementation, the determination module 401 is configured to determine second configuration information of a reference signal to be sent by one or more arrays; based on the second configuration information, determine the reference signal sent by one or more array blocks; and send the reference signal to the terminal based on the one or more array blocks, so that the terminal determines the PMI information corresponding to the reference signal sent by the one or more array blocks.

In one implementation, the precoding matrix indication information includes: a precoding matrix identifier PMI and/or a phase coefficient corresponding to a precoding matrix of one or more array blocks; or

Precoding matrices in one or more array blocks.

In one embodiment, the large-scale antenna array includes a RIS array of a smart metasurface RIS.

Fig. 25 is a block diagram of a precoding device according to an exemplary embodiment. Referring to Fig. 25 , the device 500 includes a determining module 501 and a sending module 502 .

The determination module 501 is configured to determine precoding matrix identifier PMI information corresponding to reference signals in one or more array blocks included in the large-scale antenna array of the first network device;

The sending module 502 is configured to send PMI information corresponding to the reference signal in one or more array blocks to the first network device, the PMI information is used by the first network device to determine the precoding matrix indication information, and the precoding matrix indication information is used by the first network device to determine the precoding matrix of one or more array blocks included in the large-scale antenna array.

In one implementation, the apparatus 500 further includes a receiving module 503. The receiving module 503 is configured to receive first configuration information of a reference signal sent by a first network device;

The determination module 501 is configured to determine the PMI information corresponding to the reference signals in the one or more array blocks based on the first configuration information.

In one implementation, the first configuration information includes at least one of the following:

Array blocks corresponding to reference signals;

The time-frequency resources occupied by the reference signal;

Sequence information of the reference signal.

In one implementation, the receiving module 503 is configured to receive a reference signal sent by one or more array blocks in a large-scale antenna array of the first network device;

The determination module 501 is configured to perform channel estimation on reference signals sent by one or more array blocks based on the first configuration information, and determine PMI information corresponding to the reference signals in the one or more array blocks.

In one embodiment, the sending module is configured to report PMI information corresponding to the reference signal in one or more array blocks to the first network device at one time; or to report PMI information corresponding to the reference signal in one or more array blocks to the first network device multiple times, wherein the PMI information reported each time includes the PMI information corresponding to the reference signal in one or more array blocks.

In one embodiment, the large-scale antenna array includes a RIS array of a smart metasurface RIS.

Fig. 26 is a block diagram of a device 600 for a precoding method according to an exemplary embodiment. For example, the device 600 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

26 , the device 600 may include one or more of the following components: a processing component 602 , a memory 604 , a power component 606 , a multimedia component 608 , an audio component 610 , an input/output (I/O) interface 612 , a sensor component 614 , and a communication component 616 .

The processing component 602 generally controls the overall operation of the device 600, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 602 may include one or more processors 620 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 602 may include one or more modules to facilitate the interaction between the processing component 602 and other components. For example, the processing component 602 may include a multimedia module to facilitate the interaction between the multimedia component 608 and the processing component 602.

The memory 604 is configured to store various types of data to support operations on the device 600. Examples of such data include instructions for any application or method operating on the device 600, contact data, phone book data, messages, pictures, videos, etc. The memory 604 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

The power component 606 provides power to the various components of the device 600. The power component 606 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 400.

The multimedia component 608 includes a screen that provides an output interface between the device 600 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 608 includes a front camera and/or a rear camera. When the device 600 is in an operating mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 610 is configured to output and/or input audio signals. For example, the audio component 610 includes a microphone (MIC), and when the device 600 is in an operating mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 604 or sent via the communication component 616. In some embodiments, the audio component 610 also includes a speaker for outputting audio signals.

I/O interface 612 provides an interface between processing component 602 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 614 includes one or more sensors for providing various aspects of status assessment for the device 600. For example, the sensor assembly 614 can detect the open/closed state of the device 600, the relative positioning of components, such as the display and keypad of the device 600, and the sensor assembly 614 can also detect the position change of the device 600 or a component of the device 600, the presence or absence of user contact with the device 600, the orientation or acceleration/deceleration of the device 600, and the temperature change of the device 600. The sensor assembly 614 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 614 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 614 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 616 is configured to facilitate wired or wireless communication between the device 600 and other devices. The device 600 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 616 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 616 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

In an exemplary embodiment, the apparatus 600 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to perform the above method.

In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 604 including instructions, and the instructions can be executed by a processor 620 of the device 600 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

FIG. 27 is a block diagram of a device 700 for precoding according to an exemplary embodiment. For example, the device 700 may be provided as a server. Referring to FIG. 27 , the device 700 includes a processing component 722, which further includes one or more processors, and a memory resource represented by a memory 732 for storing instructions executable by the processing component 722, such as an application. The application stored in the memory 732 may include one or more modules, each corresponding to a set of instructions. In addition, the processing component 722 is configured to execute instructions to perform the above-mentioned offline authentication method.

The device 700 may also include a power supply component 726 configured to perform power management of the device 700, a wired or wireless network interface 750 configured to connect the device 700 to a network, and an input/output (I/O) interface 758. The device 700 may operate based on an operating system stored in the memory 732, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, or the like.

It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar thereto. "And/or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and/or B may represent: A exists alone, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

It is further understood that the meanings of the words "in response to" and "if" involved in the present disclosure depend on the context and the actual usage scenario. For example, the word "in response to" used herein can be interpreted as "at..." or "when..." or "if" or "if".

It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modifications, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure.

It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims (42)

A precoding method, characterized in that it is applied to a first network device, the method comprising: Acquire large-scale antenna array information of a second network device, wherein the large-scale antenna array information includes at least array block information; Based on the array block information included in the large-scale antenna array information, determine precoding matrix indication information, where the precoding matrix indication information is used by the second network device to determine a precoding matrix of one or more array blocks included in the large-scale antenna array; The precoding matrix indication information is sent to the second network device. The method according to claim 1, characterized in that the determining of the precoding matrix indication information based on the array block information included in the large-scale antenna array information comprises: receiving precoding matrix identifier PMI information corresponding to the reference signal in the one or more array blocks reported by the terminal; The precoding matrix indication information is determined based on the PMI information and the incident angle information. The method according to claim 2, characterized in that the method further comprises: First configuration information of the reference signal is sent to a terminal, where the first configuration information is used by the terminal to determine PMI information corresponding to the reference signal in the one or more array blocks. The method according to claim 3, characterized in that the first configuration information includes at least one of the following: The array blocks corresponding to the reference signal; The time-frequency resources occupied by the reference signal; The sequence information of the reference signal. The method according to claim 2, characterized in that the PMI information corresponding to the reference signal in the one or more array blocks reported by the receiving terminal includes: receiving PMI information corresponding to the reference signals in the one or more array blocks reported by the terminal at one time; or The receiving terminal reports PMI information corresponding to the reference signals in the one or more array blocks for multiple times, wherein the PMI information reported each time for the multiple times includes the PMI information corresponding to the reference signals in the one or more array blocks. The method according to claim 2, characterized in that the method further comprises: Second configuration information of the reference signal is sent to the second network device, where the second configuration information is used by the second network device to determine the reference signal sent by one or more array blocks in the large-scale antenna array. The method according to claim 1, characterized in that the precoding matrix indication information comprises: a precoding matrix identifier PMI and/or a phase coefficient corresponding to the precoding matrix of the one or more array blocks; or The precoding matrices in the one or more array blocks. The method according to claim 1, characterized in that the obtaining of large-scale antenna array information comprises: Obtaining large-scale antenna array information reported by the second network device; or Acquire, from a core network device, large-scale antenna array information stored offline by the core network device. The method according to any one of claims 1 to 8 is characterized in that the large-scale antenna array comprises a RIS array of an intelligent metasurface RIS. A precoding method, characterized in that it is applied to a second network device, the method comprising: Receiving precoding matrix indication information sent by the first network device; Based on the precoding matrix indication information, a precoding matrix of one or more array blocks included in the massive antenna array of the second network device is determined. The method according to claim 10, characterized in that the method further comprises: Sending large-scale antenna array information to the first network device, wherein the large-scale antenna array information includes at least array block information, and the array block information is used by the first network device to determine the precoding matrix indication information. The method according to claim 11, characterized in that the method further comprises: Acquire second configuration information of reference signals to be sent by the one or more array blocks; Determining, based on the second configuration information, reference signals sent by the one or more array blocks; A reference signal is sent to a terminal based on the one or more array blocks, so that the terminal determines PMI information corresponding to the reference signal sent by the one or more array blocks. The method according to claim 12, characterized in that the obtaining of the second configuration information of the reference signal to be sent by the one or more array blocks comprises: receiving second configuration information of the reference signal sent by the first network device; or Acquire, from a core network device, second configuration information of a reference signal stored offline by the core network device. The method according to claim 10, characterized in that the precoding matrix indication information comprises: The precoding matrix identifier PMI and/or phase coefficient corresponding to the precoding matrix of the one or more array blocks; or The precoding matrices in the one or more array blocks. The method according to any one of claims 10 to 14 is characterized in that the large-scale antenna array comprises a RIS array of an intelligent metasurface RIS. A precoding method, characterized in that it is applied to a terminal, and the method comprises: Determine precoding matrix identifier PMI information corresponding to reference signals in one or more array blocks included in the massive antenna array of the second network device; The PMI information corresponding to the reference signal in the one or more array blocks is sent to the first network device, the PMI information is used by the first network device to determine the precoding matrix indication information, and the precoding matrix indication information is used by the second network device to determine the precoding matrix of one or more array blocks included in the large-scale antenna array. The method according to claim 16, characterized in that the method further comprises: Receiving first configuration information of a reference signal sent by the first network device; The PMI information corresponding to the reference signals in the one or more array blocks is determined based on the first configuration information. The method according to claim 17, wherein the first configuration information includes at least one of the following: The array blocks corresponding to the reference signal; The time-frequency resources occupied by the reference signal; The sequence information of the reference signal. The method according to claim 17, wherein determining the PMI information corresponding to the reference signal in the one or more array blocks based on the first configuration information comprises: Receiving a reference signal sent by one or more array blocks in a large-scale antenna array of the second network device; Based on the first configuration information, channel estimation is performed on the reference signals sent by the one or more array blocks to determine PMI information corresponding to the reference signals in the one or more array blocks. The method according to claim 16, wherein the sending the PMI information corresponding to the reference signal in the one or more array blocks to the first network device comprises: Reporting the PMI information corresponding to the reference signals in the one or more array blocks to the first network device at one time; or Reporting PMI information corresponding to the reference signals in the one or more array blocks to the first network device multiple times, wherein the PMI information reported each time in the multiple times includes the PMI information corresponding to the reference signals in the one or more array blocks. The method according to any one of claims 16 to 20 is characterized in that the large-scale antenna array comprises a RIS array of an intelligent metasurface RIS. A precoding method, characterized in that it is applied to a first network device, the method comprising: Determine large-scale antenna array information, wherein the large-scale antenna array information includes at least array block information; Determine precoding matrix indication information based on array block information included in the large-scale antenna array information; Based on the precoding matrix indication information, a precoding matrix of one or more array blocks included in the large-scale antenna array is determined. The method according to claim 22, characterized in that the determining of the precoding matrix indication information based on the array block information included in the large-scale antenna array information comprises: receiving precoding matrix identifier PMI information corresponding to the reference signal in the one or more array blocks reported by the terminal; The precoding matrix indication information is determined based on the PMI information and the incident angle information. The method according to claim 23, characterized in that the method further comprises: Sending first configuration information of the reference signal to a terminal, where the first configuration information is used by the terminal to determine PMI information corresponding to the reference signal in the one or more array blocks. The method according to claim 24, wherein the first configuration information includes at least one of the following: The array blocks corresponding to the reference signal; The time-frequency resources occupied by the reference signal; The sequence information of the reference signal. The method according to claim 23, characterized in that the PMI information corresponding to the reference signal in the one or more array blocks reported by the receiving terminal includes: receiving PMI information corresponding to the reference signals in the one or more array blocks reported by the terminal at one time; or The receiving terminal reports PMI information corresponding to the reference signals in the one or more array blocks for multiple times, wherein the PMI information reported each time for the multiple times includes the PMI information corresponding to the reference signals in the one or more array blocks. The method according to claim 23, characterized in that the method further comprises: Determining second configuration information of reference signals to be sent by one or more arrays; Determining, based on the second configuration information, reference signals sent by the one or more array blocks; A reference signal is sent to a terminal based on the one or more array blocks, so that the terminal determines PMI information corresponding to the reference signal sent by the one or more array blocks. The method according to claim 22, characterized in that the precoding matrix indication information comprises: The precoding matrix identifier PMI and/or phase coefficient corresponding to the precoding matrix of the one or more array blocks; or The precoding matrices in the one or more array blocks. The method according to any one of claims 22 to 28 is characterized in that the large-scale antenna array comprises a RIS array of a smart metasurface RIS. A precoding method, characterized in that it is applied to a terminal, and the method comprises: Determine precoding matrix identifier PMI information corresponding to reference signals in one or more array blocks included in a large-scale antenna array of a first network device; The PMI information corresponding to the reference signal in the one or more array blocks is sent to the first network device, and the PMI information is used by the first network device to determine the precoding matrix indication information, and the precoding matrix indication information is used by the first network device to determine the precoding matrix of one or more array blocks included in the large-scale antenna array. The method according to claim 30, characterized in that the method further comprises: Receiving first configuration information of a reference signal sent by the first network device; The PMI information corresponding to the reference signals in the one or more array blocks is determined based on the first configuration information. The method according to claim 31, characterized in that the first configuration information includes at least one of the following: The array blocks corresponding to the reference signal; The time-frequency resources occupied by the reference signal; The sequence information of the reference signal. The method according to claim 31, characterized in that the determining, based on the first configuration information, the PMI information corresponding to the reference signal in the one or more array blocks comprises: Receiving a reference signal sent by one or more array blocks in a large-scale antenna array of the first network device; Based on the first configuration information, channel estimation is performed on the reference signals sent by the one or more array blocks to determine PMI information corresponding to the reference signals in the one or more array blocks. The method according to claim 30, characterized in that the sending the PMI information corresponding to the reference signal in the one or more array blocks to the first network device comprises: Reporting the PMI information corresponding to the reference signals in the one or more array blocks to the first network device at one time; or Reporting PMI information corresponding to the reference signals in the one or more array blocks to the first network device multiple times, wherein the PMI information reported each time in the multiple times includes the PMI information corresponding to the reference signals in the one or more array blocks. The method according to any one of claims 30 to 34 is characterized in that the large-scale antenna array comprises a RIS array of an intelligent metasurface RIS. A precoding device, characterized in that it is applied to a first network device, and the device comprises: An acquisition module, configured to acquire large-scale antenna array information of a second network device, wherein the large-scale antenna array information includes at least array block information; a determination module, configured to determine precoding matrix indication information based on array block information included in the large-scale antenna array information, wherein the precoding matrix indication information is used by the second network device to determine a precoding matrix of one or more array blocks included in the large-scale antenna array; A sending module is used to send the precoding matrix indication information to the second network device. A precoding device, characterized in that it is applied to a second network device, and the device comprises: A receiving module, used to receive precoding matrix indication information sent by the first network device; A determination module is used to determine, based on the precoding matrix indication information, a precoding matrix of one or more array blocks included in the large-scale antenna array of the second network device. A precoding device, characterized in that it is applied to a terminal, and the device comprises: A determination module, configured to determine precoding matrix identifier PMI information corresponding to reference signals in one or more array blocks included in a large-scale antenna array of a second network device; A sending module is used to send PMI information corresponding to the reference signal in the one or more array blocks to the first network device, the PMI information is used by the first network device to determine precoding matrix indication information, and the precoding matrix indication information is used by the second network device to determine the precoding matrix of one or more array blocks included in the large-scale antenna array. A precoding device, characterized in that it is applied to a first network device, and the device comprises: A determination module is used to determine large-scale antenna array information, wherein the large-scale antenna array information at least includes array block information; based on the array block information included in the large-scale antenna array information, determine precoding matrix indication information; based on the precoding matrix indication information, determine the precoding matrix of one or more array blocks included in the large-scale antenna array. A precoding device, characterized in that it is applied to a terminal, and the device comprises: A determination module, configured to determine precoding matrix identifier PMI information corresponding to reference signals in one or more array blocks included in a large-scale antenna array of a first network device; A sending module is used to send PMI information corresponding to the reference signal in the one or more array blocks to the first network device, and the PMI information is used by the first network device to determine precoding matrix indication information, and the precoding matrix indication information is used by the first network device to determine the precoding matrix of one or more array blocks included in the large-scale antenna array. A precoding device, characterized by comprising: processor; a memory for storing processor-executable instructions; The processor is configured to: execute the precoding method described in any one of claims 1 to 9, or execute the precoding method described in any one of claims 10 to 15, or execute the precoding method described in any one of claims 16 to 21, or execute the precoding method described in any one of claims 22 to 29, or execute the precoding method described in any one of claims 30 to 35. A storage medium, characterized in that instructions are stored in the storage medium, and when the instructions in the storage medium are executed by a processor of a first network device, the first network device is enabled to execute the precoding method described in any one of claims 1 to 9, or when the instructions in the storage medium are executed by a processor of a second network device, the second network device is enabled to execute the precoding method described in any one of claims 10 to 15, or when the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the precoding method described in any one of claims 16 to 21, or when the instructions in the storage medium are executed by the processor of the first network device, the first network device is enabled to execute the precoding method described in any one of claims 22 to 29, or when the instructions in the storage medium are executed by the processor of the terminal, the terminal is enabled to execute the precoding method described in any one of claims 30 to 35.

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