Precoding method and device

Abstract

The invention provides a pre-coding method and device, and relates to the technical field of wireless communication, and according to the pre-coding method and device provided by the invention, first network equipment can determine phase shift matrix indication information of second network equipment; and sending the phase shift matrix indication information to the second network device. According to the invention, the precoding process of the RIS can be simplified, the precoding complexity is reduced, and the precoding efficiency is improved.

Description

Precoding method and device Technical Field

[0001] The present disclosure relates to the field of wireless communication technology, and in particular to a precoding method and device. Background Art

[0002] In traditional communications, the wireless environment is an uncontrollable factor. This uncontrollability often negatively impacts communication efficiency and reduces service quality. Signal attenuation limits the propagation distance of wireless signals, multipath effects lead to fading, and reflection and refraction from large objects are major uncontrollable factors. Deploying reconfigurable intelligent metasurfaces (RIS) on various surfaces within wireless transmission environments promises to overcome the uncontrollability of traditional wireless channels, building intelligent, programmable wireless networks and ushering in a new paradigm for future wireless communications. Specifically, RIS can use precoding technology to reflect incident signals in a specific direction, thereby enhancing signal strength at the receiving end and achieving channel control.

[0003] Currently, RIS precoding technology has become a research hotspot in academia. The primary approach is to jointly design the RIS and base station precoding using alternating optimization techniques. However, this joint design requires the use of corresponding communication algorithms and continuous iterative calculations to determine the RIS precoding matrix. This increases the complexity of the precoding, resulting in low precoding efficiency and making it unsuitable for practical applications.

[0004] Summary of the Invention

[0005] The present disclosure provides a precoding method and apparatus, which can simplify the precoding process of RIS, reduce precoding complexity, and improve precoding efficiency.

[0006] A first aspect of the present disclosure provides a precoding method, where the method is performed by a first network device and includes:

[0007] Determining phase shift matrix indication information of the second network device;

[0008] The phase shift matrix indication information is sent to the second network device.

[0009] In some embodiments of the present disclosure, the phase shift matrix indication information is first phase shift matrix indication information, where the first phase shift matrix indication information includes incident angle information of the transmitted signal, and PMIs for the second network device reported by multiple terminals and beam quality information corresponding to the PMIs. Determining the phase shift matrix indication information of the second network device includes:

[0010] Determining incident angle information of the transmitted signal;

[0011] The incident angle information of the transmitted signal, and the PMIs for the second network device reported by multiple terminals and the beam quality information corresponding to the PMIs are determined as the first phase shift matrix indication information.

[0012] In some embodiments of the present disclosure, the phase shift matrix indication information is second phase shift matrix indication information, the second phase shift matrix indication information includes incident angle information of the transmitted signal, second reflection angle information, or second transmission angle information of the second network device, and determining the phase shift matrix indication information of the second network device includes:

[0013] determining incident angle information of the transmitted signal; and

[0014] Determining second reflection angle information or second transmission angle information of the second network device according to PMIs for the second network device reported by multiple terminals and beam quality information corresponding to the PMIs;

[0015] The incident angle information of the transmitted signal, the second reflection angle information or the second transmission angle information of the second network device is determined as the second phase shift matrix indication information.

[0016] In some embodiments of the present disclosure, the phase shift matrix indication information is third phase shift matrix indication information, the third phase shift matrix indication information includes the second phase shift matrix, and determining the phase shift matrix indication information of the second network device includes:

[0017] Determining second reflection angle information or second transmission angle information of the second network device according to PMIs for the second network device reported by multiple terminals and beam quality information corresponding to the PMIs;

[0018] Determine a first phase shift matrix according to incident angle information of the transmitted signal and second reflection angle information or second transmission angle information of the second network device;

[0019] performing phase shift quantization processing on the first phase shift matrix to obtain a second phase shift matrix of a second network device;

[0020] Determine that the second phase shift matrix is ​​the third phase shift matrix indication information.

[0021] In some embodiments of the present disclosure, the phase shift matrix indication information is fourth phase shift matrix indication information, the fourth phase shift matrix indication information includes a phase shift matrix PMI, and determining the phase shift matrix indication information of the second network device includes:

[0022] Determining second reflection angle information or second transmission angle information of the second network device according to PMIs for the second network device reported by multiple terminals and beam quality information corresponding to the PMIs;

[0023] Determine a first phase shift matrix according to incident angle information of the transmitted signal and second reflection angle information or second transmission angle information of the second network device;

[0024] Determine a phase shift matrix PMI corresponding to the first phase shift matrix;

[0025] The phase shift matrix PMI is determined as the fourth phase shift matrix indication information.

[0026] In some embodiments of the present disclosure, the method further includes:

[0027] Receive PMIs for the second network device and beam quality information corresponding to the PMIs reported by multiple terminals.

[0028] In some embodiments of the present disclosure, determining the second reflection angle information or the second transmission angle information of the second network device based on the PMIs reported by multiple terminals for the second network device and the beam quality information corresponding to the PMIs includes:

[0029] Determining first reflection angle information or first transmission angle information of the plurality of terminals according to PMIs for the second network device reported by the plurality of terminals;

[0030] The second reflection angle information or the second transmission angle information of the second network device is determined according to the first reflection angle information or the first transmission angle information of the multiple terminals, and the PMI for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMI.

[0031] In some embodiments of the present disclosure, determining the second reflection angle information or the second transmission angle information of the second network device based on the first reflection angle information or the first transmission angle information of the multiple terminals, and the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs includes:

[0032] Determining a beam weight of the terminal based on the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs;

[0033] According to the beam weight of the terminal, weighted processing is performed on the angle values ​​in the first reflection angle information or the first transmission angle information of the multiple terminals to obtain the second reflection angle information or the second transmission angle information of the second network device.

[0034] In some embodiments of the present disclosure, determining the second reflection angle information or the second transmission angle information of the second network device based on the first reflection angle information or the first transmission angle information of the multiple terminals, and the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs includes:

[0035] Based on the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs, the first reflection angle information or the first transmission angle information that meets the preset conditions is determined among the first reflection angle information or the first transmission angle information of the multiple terminals as the second reflection angle information or the second transmission angle information of the second network device.

[0036] In some embodiments of the present disclosure, sending the phase shift matrix indication information to the second network device includes:

[0037] Any one of the first phase shift matrix indication information, the second phase shift matrix indication information, the third phase shift matrix indication information, and the fourth phase shift matrix indication information is sent to the second network device.

[0038] A second aspect of the present disclosure provides a precoding method, where the method is performed by a second network device and includes:

[0039] Receiving phase shift matrix indication information sent by the first network device;

[0040] Signal processing is performed on a transmission signal of the first network device according to the phase shift matrix indication information.

[0041] In some embodiments of the present disclosure, the phase shift matrix indication information is first phase shift matrix indication information, where the first phase shift matrix indication information includes incident angle information of the transmitted signal, and PMIs for the second network device reported by multiple terminals and beam quality information corresponding to the PMIs. Receiving the phase shift matrix indication information sent by the first network device includes:

[0042] Receive incident angle information of a transmission signal sent by a first network device, and PMIs for a second network device reported by multiple terminals and beam quality information corresponding to the PMIs.

[0043] In some embodiments of the present disclosure, performing signal processing according to the phase shift matrix indication information includes:

[0044] Determining second reflection angle information or second transmission angle information of the second network device according to the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs;

[0045] Determine a first phase shift matrix according to the incident angle information of the transmitted signal and the second reflection angle information or the second transmission angle information of the second network device;

[0046] performing phase shift quantization processing on the first phase shift matrix to obtain a second phase shift matrix of a second network device;

[0047] determining a phase shift matrix configuration according to the second phase shift matrix;

[0048] Signal processing is performed on the transmission signal of the first network device based on the phase shift matrix configuration, wherein the signal processing includes signal reflection processing or signal transmission processing.

[0049] In some embodiments of the present disclosure, determining the second reflection angle information or the second transmission angle information of the second network device based on the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs includes:

[0050] Determining first reflection angle information or first transmission angle information of the multiple terminals according to the PMIs for the second network device reported by the multiple terminals;

[0051] The second reflection angle information or the second transmission angle information of the second network device is determined according to the first reflection angle information or the first transmission angle information of the multiple terminals, and the PMI for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMI.

[0052] In some embodiments of the present disclosure, determining the second reflection angle information or the second transmission angle information of the second network device based on the first reflection angle information or the first transmission angle information of the multiple terminals, and the PMI and the beam quality information for the second network device reported by the multiple terminals includes:

[0053] Determining a beam weight of the terminal based on the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs;

[0054] According to the beam weight of the terminal, weighted processing is performed on the angle values ​​in the first reflection angle information or the first transmission angle information of the multiple terminals to obtain the second reflection angle information or the second transmission angle information of the second network device.

[0055] In some embodiments of the present disclosure, determining the second reflection angle information or the second transmission angle information of the second network device based on the first reflection angle information or the first transmission angle information of the multiple terminals, and the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs includes:

[0056] Based on the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs, the first reflection angle information or the first transmission angle information that meets the preset conditions is determined among the first reflection angle information or the first transmission angle information of the multiple terminals as the second reflection angle information or the second transmission angle information of the second network device.

[0057] In some embodiments of the present disclosure, the phase shift matrix indication information is second phase shift matrix indication information, the second phase shift matrix indication information includes incident angle information of the transmitted signal, second reflection angle information or second transmission angle information of the second network device, and the receiving of the phase shift matrix indication information sent by the first network device includes:

[0058] Receive incident angle information of a transmission signal sent by the first network device and second reflection angle information or second transmission angle information of the second network device.

[0059] In some embodiments of the present disclosure, performing signal processing according to the phase shift matrix indication information includes:

[0060] Determine a first phase shift matrix according to the incident angle information of the transmitted signal and the second reflection angle information or the second transmission angle information of the second network device;

[0061] performing phase shift quantization processing on the first phase shift matrix to obtain a second phase shift matrix of a second network device;

[0062] determining a phase shift matrix configuration according to the second phase shift matrix;

[0063] Signal processing is performed on the transmission signal of the first network device based on the phase shift matrix configuration, wherein the signal processing includes signal reflection processing or signal transmission processing.

[0064] In some embodiments of the present disclosure, the phase shift matrix indication information is third phase shift matrix indication information, the third phase shift matrix indication information includes the second phase shift matrix, and the receiving the phase shift matrix indication information sent by the first network device includes:

[0065] A second phase shift matrix sent by the first network device is received.

[0066] In some embodiments of the present disclosure, performing signal processing according to the phase shift matrix indication information includes:

[0067] determining a phase shift matrix configuration according to the second phase shift matrix;

[0068] Signal processing is performed on the transmission signal of the first network device based on the phase shift matrix configuration, wherein the signal processing includes signal reflection processing or signal transmission processing.

[0069] In some embodiments of the present disclosure, the phase shift matrix indication information is fourth phase shift matrix indication information, the fourth phase shift matrix indication information includes a phase shift matrix PMI, and the receiving the phase shift matrix indication information sent by the first network device includes:

[0070] Receive a phase shift matrix PMI sent by the first network device.

[0071] In some embodiments of the present disclosure, performing signal processing according to the phase shift matrix indication information includes:

[0072] Determine a first phase shift matrix according to the phase shift matrix PMI;

[0073] performing phase shift quantization processing on the first phase shift matrix to obtain a second phase shift matrix of a second network device;

[0074] determining a phase shift matrix configuration according to the second phase shift matrix;

[0075] Signal processing is performed on the transmission signal of the first network device based on the phase shift matrix configuration, wherein the signal processing includes signal reflection processing or signal transmission processing.

[0076] A third aspect of the present disclosure provides a precoding method, which is performed by a terminal and includes:

[0077] Report the PMI of the second network device and beam quality information corresponding to the PMI to the first network device.

[0078] A fourth aspect of the present disclosure provides a first network device, the first network device including:

[0079] a processing module, configured to determine phase shift matrix indication information of a second network device;

[0080] A sending module is configured to send the phase shift matrix indication information to the second network device.

[0081] A fifth aspect of the present disclosure provides a second network device, the second network device including:

[0082] A receiving module, configured to receive phase shift matrix indication information sent by the first network device;

[0083] A processing module is used to perform signal processing on the transmission signal of the first network device according to the phase shift matrix indication information.

[0084] A sixth aspect of the present disclosure provides a terminal, including:

[0085] The sending module is used to report the PMI of the second network device and the beam quality information corresponding to the PMI to the first network device.

[0086] The seventh aspect embodiment of the present disclosure provides a communication device, which includes: a transceiver; a memory; and a processor, which is connected to the transceiver and the memory respectively, and is configured to control the wireless signal reception and transmission of the transceiver by executing computer-executable instructions on the memory, and can implement the method of the first aspect embodiment, the second aspect embodiment, or the third aspect embodiment of the present disclosure.

[0087] The eighth aspect embodiment of the present disclosure provides a computer storage medium, wherein the computer storage medium stores computer-executable instructions; after the computer-executable instructions are executed by the processor, the method of the first aspect embodiment, the second aspect embodiment, or the third aspect embodiment of the present disclosure can be implemented.

[0088] An embodiment of the ninth aspect of the present disclosure provides a communication system, including a first network device, a second network device and a terminal, wherein the first network device is used to execute the method of the embodiment of the first aspect of the present disclosure; the second network device is used to execute the method of the embodiment of the second aspect of the present disclosure; and the terminal is used to execute the method of the embodiment of the third aspect of the present disclosure.

[0089] Embodiments of the present disclosure provide a precoding method and apparatus. A first network device (base station) can determine phase shift matrix indication information of a second network device and send the phase shift matrix indication information to a second network device (RIS), enabling the second network device to perform signal processing on the first network device's transmitted signal based on the phase shift matrix indication information. The present disclosure can determine the phase shift matrix indication information containing precoding information in the first network device through simple data processing, allowing the second network device to directly configure the phase shift matrix based on the phase shift matrix indication information and perform signal processing on the first network device's transmitted signal. Therefore, the present disclosure avoids the use of complex algorithms for the joint design of precoding at the RIS and base station, thereby simplifying the RIS's precoding process, reducing precoding complexity, and improving precoding efficiency.

[0090] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0092] FIG1 is a schematic diagram of a flow chart of a precoding method according to an embodiment of the present disclosure;

[0093] FIG2 is a schematic diagram of a flow chart of a precoding method according to an embodiment of the present disclosure;

[0094] FIG3 is a schematic diagram of a flow chart of a precoding method according to an embodiment of the present disclosure;

[0095] FIG4 is a schematic diagram of a flow chart of a precoding method according to an embodiment of the present disclosure;

[0096] FIG5 is a schematic diagram of a flow chart of a precoding method according to an embodiment of the present disclosure;

[0097] FIG6 is a schematic flow chart of a precoding method according to an embodiment of the present disclosure;

[0098] FIG7 is a schematic diagram of a flow chart of a precoding method according to an embodiment of the present disclosure;

[0099] FIG8 is a schematic diagram of a flow chart of a precoding method according to an embodiment of the present disclosure;

[0100] FIG9 is a schematic diagram of a flow chart of a precoding method according to an embodiment of the present disclosure;

[0101] FIG10 is a schematic diagram of a flow chart of a precoding method according to an embodiment of the present disclosure;

[0102] FIG11 is a schematic flow chart of a precoding method according to an embodiment of the present disclosure;

[0103] FIG12 is a block diagram of a precoding device according to an embodiment of the present disclosure;

[0104] FIG13 is a block diagram of a precoding device according to an embodiment of the present disclosure;

[0105] FIG14 is a block diagram of a precoding device according to an embodiment of the present disclosure;

[0106] FIG15 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure;

[0107] FIG16 is a schematic structural diagram of a chip provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0108] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0109] In a communication system assisted by a reconfigurable intelligent surface (RIS), a base station reflects signals to a terminal via the RIS. Each unit in the RIS can perform different phase shifts on the received signal, thereby achieving an adjustable reflected beam direction. Existing research has shown that the offset phase angle of a RIS unit can only have a few discrete values. In order to reflect the incident signal from the RIS to the receiving end, the offset phases of the RIS units need to be configured, i.e., precoding. Currently, RIS precoding technology has become a research hotspot in academia, where the precoding of the RIS and the base station is primarily designed jointly through alternating optimization techniques. However, this joint design requires the use of a corresponding communication algorithm to perform continuous iterative calculations to determine the RIS precoding matrix, which increases the complexity of the precoding, resulting in low precoding efficiency and making it unsuitable for practical applications.

[0110] To this end, the present disclosure proposes a precoding method and apparatus, which can simplify the precoding process of RIS, reduce precoding complexity, and improve precoding efficiency.

[0111] The precoding method and apparatus provided in this application are described in detail below with reference to the accompanying drawings.

[0112] Figure 1 shows a flow chart of a precoding method according to an embodiment of the present disclosure. As shown in Figure 1 , the method includes being executed by a first network device, wherein the first network device may be a base station, and the embodiment may include the following steps.

[0113] Step 101: Determine phase shift matrix indication information of a second network device.

[0114] The second network device may be a RIS, and the phase shift matrix indication information is used to determine a phase shift matrix configuration of the second network device, so that the second network device performs signal reflection processing or signal transmission processing on a transmitted signal of the first network device based on the phase shift matrix configuration. Accordingly, a specific implementation process of determining the phase shift matrix indication information of the second network device may be:

[0115] (1) One or more terminals report a precoding matrix indicator (PMI) for the second network device to the first network device. In addition, one or more terminals may also report beam quality information corresponding to the PMI or other information that can be used to determine the beam weight (such as terminal priority information, etc.) to the first network device.

[0116] Among them, the beam quality information corresponding to the PMI is used to reflect the quality of beam transmission. In specific application scenarios, it can be measured using Reference Signal Receiving Power (RSRP), Signal to Interference plus Noise Ratio (SINR), Reference Signal Received Quality (RSRQ), Received Signal Strength Indicator (RSSI), etc. Exemplarily, as a possible implementation method, one of the above information can be used as the beam quality information corresponding to the PMI; as a possible implementation method, multiple types of the above information can also be fused through a preset algorithm (such as weighted fusion, etc.) to obtain the beam quality information corresponding to the PMI.

[0117] (2) The first network device determines the phase shift matrix indication information of the second network device according to the information reported by the terminal.

[0118] The phase shift matrix indication information of the second network device may include any one of first phase shift matrix indication information, second phase shift matrix indication information, third phase shift matrix indication information, and fourth phase shift matrix indication information. The first phase shift matrix indication information may include: incident angle information of the transmitted signal, and a precoding matrix indicator (PMI) for the second network device reported by multiple terminals and beam quality information corresponding to the PMI; the second phase shift matrix indication information may include: incident angle information of the transmitted signal, second reflection angle information or second transmission angle information of the second network device; the third phase shift matrix indication information may include: the phase shift matrix of the second network device; and the fourth phase shift matrix indication information may include the phase shift matrix PMI.

[0119] Accordingly, the specific implementation process of the first network device determining the first phase shift matrix indication information based on the information reported by the terminal can be referred to the relevant descriptions in steps 201 to 203 of the embodiment; the specific implementation process of the first network device determining the second phase shift matrix indication information based on the information reported by the terminal can be referred to the relevant descriptions in steps 301 to 303 of the embodiment; the specific implementation process of the first network device determining the third phase shift matrix indication information based on the information reported by the terminal can be referred to the relevant descriptions in steps 401 to 405 of the embodiment; the specific implementation process of the first network device determining the fourth phase shift matrix indication information based on the information reported by the terminal can be referred to the relevant descriptions in steps 501 to 505 of the embodiment.

[0120] Step 102: Send phase shift matrix indication information to the second network device.

[0121] For an embodiment of the present disclosure, the embodiment steps may include: sending any one of the first phase shift matrix indication information, the second phase shift matrix indication information, the third phase shift matrix indication information, and the fourth phase shift matrix indication information to a second network device, so that the second network device determines a phase shift matrix configuration based on any one of the first phase shift matrix indication information, the second phase shift matrix indication information, the third phase shift matrix indication information, and the fourth phase shift matrix indication information, and performs signal reflection processing or signal transmission processing on the transmission signal of the first network device based on the phase shift matrix configuration.

[0122] In summary, according to the precoding method provided in the embodiments of the present disclosure, a first network device (base station) can determine the phase shift matrix indication information of the second network device and send the phase shift matrix indication information to the second network device (RIS), so that the second network device can perform signal processing on the transmit signal of the first network device according to the phase shift matrix indication information. The present disclosure can determine the phase shift matrix indication information containing precoding information in the first network device through simple data processing, so that the second network device can directly configure the phase shift matrix according to the phase shift matrix indication information and perform signal processing on the transmit signal of the first network device. Therefore, the present disclosure can avoid the use of complex algorithms for iterative calculations, thereby simplifying the precoding process of the RIS, reducing precoding complexity, and improving precoding efficiency.

[0123] FIG2 shows a precoding method according to an embodiment of the present disclosure. The method is performed by a first network device, is based on the embodiment shown in FIG1 , and may include the following steps as shown in FIG2 .

[0124] Step 201: Receive PMIs for a second network device and beam quality information corresponding to the PMIs reported by multiple terminals.

[0125] Step 202: Determine the incident angle information of the transmitted signal.

[0126] The incident angle information is the incident angle of the transmission signal transmitted by the first network device (base station) at the second network device (RIS), which can be determined by the base station through various optional methods such as channel estimation, protocol agreement, or sensing information fed back by the RIS.

[0127] Step 203: Determine the incident angle information of the transmitted signal, and the PMIs for the second network device reported by multiple terminals and the beam quality information corresponding to the PMIs as first phase shift matrix indication information.

[0128] Step 204: Send the first phase shift matrix indication information to the second network device.

[0129] In summary, according to the precoding method provided in the embodiment of the present disclosure, the first network device (base station) can directly determine the incident angle information of the transmitted signal, as well as the PMI and beam quality information corresponding to the PMI reported by multiple terminals for the second network device as the first phase shift matrix indication information, and send the first phase shift matrix indication information to the second network device, so that the second network device can perform signal processing on the transmitted signal of the first network device according to the first phase shift matrix indication information. Since the first phase shift matrix indication information contains precoding information or beam information, the second network device can directly configure the phase shift matrix according to the first phase shift matrix indication information and perform signal processing on the transmitted signal of the first network device. Therefore, the present disclosure can avoid the use of complex algorithms for iterative calculations, thereby simplifying the precoding process of RIS, reducing precoding complexity, and improving precoding efficiency.

[0130] FIG3 shows a precoding method according to an embodiment of the present disclosure. The method is performed by a first network device, based on the embodiment shown in FIG1 , as shown in FIG3 , and may include the following steps.

[0131] Step 301: Receive PMIs for a second network device and beam quality information corresponding to the PMIs reported by multiple terminals.

[0132] Step 302: Determine the incident angle information of the transmitted signal, and determine the second reflection angle information or the second transmission angle information of the second network device based on the PMI and beam quality information corresponding to the PMI reported by multiple terminals for the second network device.

[0133] In an embodiment of the present disclosure, when determining second reflection angle information or second transmission angle information of a second network device based on PMIs and beam quality information corresponding to the PMIs reported by multiple terminals for the second network device, the embodiment steps may specifically include: determining first reflection angle information or first transmission angle information of the multiple terminals based on the PMIs reported by the multiple terminals for the second network device; and determining second reflection angle information or second transmission angle information of the second network device based on the first reflection angle information or first transmission angle information of the multiple terminals and the PMIs and beam quality information corresponding to the PMIs reported by the multiple terminals for the second network device. The reflection angle information and the transmission angle information may be jointly represented from the perspective of two dimensions: the first dimension is the horizontal dimension, and the second dimension is the vertical dimension. That is, the first reflection angle information of the multiple terminals includes the first reflection angle information in the horizontal dimension and the first reflection angle information in the vertical dimension, and the first transmission angle information of the multiple terminals includes the first transmission angle information in the horizontal dimension and the first transmission angle information in the vertical dimension. Accordingly, the second reflection angle information of the second network device includes the second reflection angle information in the horizontal dimension and the second reflection angle information in the vertical dimension. The second transmission angle information of the second network device includes the second transmission angle information in the horizontal dimension and the second transmission angle information in the vertical dimension.

[0134] Accordingly, when determining the second reflection angle information or the second transmission angle information of the second network device, at least one of the PMI for the second network device and the beam quality information corresponding to the PMI reported by multiple terminals can be used together with the first reflection angle information or the first transmission angle information of the multiple terminals to determine the second reflection angle information or the second transmission angle information of the second network device. That is, the second reflection angle information or the second transmission angle information of the second network device can be determined using the beam quality information corresponding to the PMI reported by multiple terminals and the first reflection angle information or the first transmission angle information of the multiple terminals; the second reflection angle information or the second transmission angle information of the second network device can also be determined using the PMI for the second network device reported by multiple terminals and the first reflection angle information or the first transmission angle information of the multiple terminals; the second reflection angle information or the second transmission angle information of the second network device can also be determined using the PMI for the second network device reported by multiple terminals and the beam quality information corresponding to the PMI reported by multiple terminals together with the first reflection angle information or the first transmission angle information of the multiple terminals.

[0135] As a possible implementation, the second reflection angle information or second transmission angle information of the second network device can be determined using weighted methods. Specifically, a weight value for each terminal can be calculated based on at least one of the PMI of the second network device and the beam quality information corresponding to the PMI. The first reflection angle information or first transmission angle information of the multiple terminals can be weighted based on the weight value to determine the second reflection angle information or second transmission angle information of the second network device. Exemplarily, when calculating the weight value of each terminal according to the beam quality information corresponding to the PMI, taking the horizontal dimension and including three terminals as an example, the angles corresponding to the first reflection angle information of the horizontal dimension or the first transmission angle information of the horizontal dimension are α1, α2, and α3, respectively, and the corresponding beam qualities are b1, b2, and b3, respectively. The horizontal second reflection angle information or the horizontal second transmission angle information used by RIS is c1*α1+c2*α2+c3*α3, where c1, c2, c3∈[0,1], c1+c2+c3=1, c1, c2, c3 are the weights corresponding to α1, α2, and α3, which are determined according to b1, b2, and b3, where the weight determination example is: Correspondingly, the vertical dimension is determined in the same manner and will not be further described here. Accordingly, the embodiment steps may include: determining the beam weight of the terminal based on the PMI and beam quality information corresponding to the PMI reported by multiple terminals for the second network device; and performing weighted processing on the angle values ​​in the first reflection angle information or first transmission angle information of the multiple terminals according to the beam weight of the terminal to obtain the second reflection angle information or second transmission angle information of the second network device.

[0136] As a possible implementation, the direction with the best beam quality among the first reflection angle information or first transmission angle information corresponding to multiple terminals can be used as the second reflection angle information or second transmission angle information of the second network device. That is, in the corresponding weighted method, the weight of the first reflection angle information or first transmission angle information with the best beam quality is set to 1, and the weights of other directions are set to 0. The beam quality can be determined based on at least one of the PMI of the second network device and the beam quality information corresponding to the PMI. In an embodiment of the present disclosure, the horizontal first reflection angle information with the best beam quality among the multiple horizontal first reflection angle information corresponding to the multiple terminals can be determined as the horizontal second reflection angle information of the second network device; and the vertical first reflection angle information with the best beam quality among the multiple vertical first reflection angle information corresponding to the multiple terminals can be determined as the vertical second reflection angle information of the second network device. Accordingly, the embodiment may further include: based on the PMIs and beam quality information corresponding to the PMIs reported by the multiple terminals for the second network device, determining the first reflection angle information or first transmission angle information that meets preset conditions among the first reflection angle information or first transmission angle information of the multiple terminals as the second reflection angle information or second transmission angle information of the second network device. Among them, the preset condition may be optimal beam quality, or other screening conditions may be set in combination with actual application scenarios, which are not exhaustively listed here.

[0137] Step 303: Determine the incident angle information of the transmitted signal, the second reflection angle information or the second transmission angle information of the second network device as second phase shift matrix indication information.

[0138] Step 304: Send the second phase shift matrix indication information to the second network device.

[0139] In summary, according to the precoding method provided by the embodiment of the present disclosure, the first network device (base station) can determine the incident angle information of the transmitted signal after receiving the PMI and beam quality information corresponding to the PMI for the second network device reported by multiple terminals, and determine the second reflection angle information or second transmission angle information of the second network device based on the PMI and beam quality information corresponding to the PMI reported by multiple terminals, and then determine the incident angle information of the transmitted signal, the second reflection angle information or second transmission angle information of the second network device as the second phase shift matrix indication information, and send the second phase shift matrix indication information to the second network device, so that the second network device can perform signal processing on the transmitted signal of the first network device according to the second phase shift matrix indication information. Since the second phase shift matrix indication information contains precoding information or beam information, the second network device can directly configure the phase shift matrix according to the second phase shift matrix indication information and perform signal processing on the transmitted signal of the first network device. Therefore, the present disclosure can avoid the use of complex algorithms for iterative calculations, thereby simplifying the precoding process of RIS, reducing precoding complexity, and improving precoding efficiency.

[0140] FIG4 shows a precoding method according to an embodiment of the present disclosure. The method is performed by a first network device, based on the embodiment shown in FIG1 , as shown in FIG4 , and may include the following steps.

[0141] Step 401: Receive PMIs for a second network device and beam quality information corresponding to the PMIs reported by multiple terminals.

[0142] Step 402: Determine second reflection angle information or second transmission angle information of the second network device according to the PMIs for the second network device and the beam quality information corresponding to the PMIs reported by multiple terminals.

[0143] For the embodiments of the present disclosure, please refer to the relevant description in step 302 of the embodiment for details, which will not be repeated here.

[0144] Step 403: Determine a first phase shift matrix according to the incident angle information of the transmitted signal and the second reflection angle information or the second transmission angle information of the second network device.

[0145] For the embodiments of the present disclosure, as a possible implementation method, a first phase shift matrix for supporting signal reflection processing can be calculated based on the incident angle information of the transmitted signal and the second reflection angle information of the second network device; as a possible implementation method, a first phase shift matrix for supporting signal transmission processing can be calculated based on the incident angle information of the transmitted signal and the second transmission angle information of the second network device.

[0146] Step 404: Perform phase shift quantization processing on the first phase shift matrix to obtain a second phase shift matrix of the second network device.

[0147] In specific application scenarios, since the first phase-shift matrix is ​​a continuous phase-shift matrix calculated based on the continuous phase incident angle information, the second reflection angle information, or the second transmission angle information, and the phase of the RIS can only be at a few discrete phases, after calculating the first phase-shift matrix, it is necessary to perform phase-shift quantization on the first phase-shift matrix to quantize the phase shift of each element in the first phase-shift matrix to a phase shift supported by the RIS. Specifically, based on the minimum distance criterion, the phase shift of each element in the first phase-shift matrix can be quantized to the discrete phase shift closest to the calculated phase shift. After the phase-shift quantization is completed, the second phase-shift matrix of the second network device is further obtained.

[0148] Step 405: Determine that the second phase shift matrix is ​​the third phase shift matrix indication information.

[0149] Step 406: Send the third phase shift matrix indication information to the second network device.

[0150] In summary, according to the precoding method provided by the embodiment of the present disclosure, the first network device (base station) can determine the incident angle information of the transmitted signal after receiving the PMI and beam quality information corresponding to the PMI for the second network device reported by multiple terminals, and determine the second reflection angle information or second transmission angle information of the second network device based on the PMI and beam quality information corresponding to the PMI for the second network device reported by multiple terminals; then determine the first phase shift matrix based on the incident angle information of the transmitted signal, the second reflection angle information or the second transmission angle information of the second network device, and perform phase shift quantization processing on the first phase shift matrix to obtain the second phase shift matrix of the second network device; then, send the second phase shift matrix as the third phase shift matrix indication information to the second network device, so that the second network device can perform signal processing on the transmitted signal of the first network device according to the third phase shift matrix indication information. Because the third phase shift matrix indication information includes precoding information or beam information, the second network device can directly configure the phase shift matrix according to the third phase shift matrix indication information and perform signal processing on the transmission signal of the first network device. Therefore, the present disclosure can avoid the use of complex algorithms for iterative calculations, thereby simplifying the RIS precoding process, reducing precoding complexity, and improving precoding efficiency.

[0151] FIG5 shows a precoding method according to an embodiment of the present disclosure. The method is performed by a first network device, based on the embodiment shown in FIG1 , as shown in FIG5 , and may include the following steps.

[0152] Step 501: Receive PMIs for a second network device and beam quality information corresponding to the PMIs reported by multiple terminals.

[0153] Step 502: Determine second reflection angle information or second transmission angle information of the second network device according to the PMIs for the second network device and the beam quality information corresponding to the PMIs reported by multiple terminals.

[0154] For the embodiments of the present disclosure, please refer to the relevant description in step 302 of the embodiment for details, which will not be repeated here.

[0155] Step 503: Determine a first phase shift matrix according to the incident angle information of the transmitted signal and the second reflection angle information or the second transmission angle information of the second network device.

[0156] Step 504: Determine a phase shift matrix PMI corresponding to the first phase shift matrix.

[0157] According to the embodiment of the present disclosure, after the first phase shift matrix is ​​determined and obtained, the phase shift matrix PMI corresponding to the first phase shift matrix can be extracted, so that the phase shift matrix PMI can be directly determined as the fourth phase shift matrix indication information.

[0158] Step 505: Determine the phase shift matrix PMI as fourth phase shift matrix indication information.

[0159] Step 506: Send the fourth phase shift matrix indication information to the second network device.

[0160] In summary, according to the precoding method provided by the embodiment of the present disclosure, the first network device (base station) can determine the incident angle information of the transmitted signal after receiving the PMI and beam quality information corresponding to the PMI for the second network device reported by multiple terminals, and determine the second reflection angle information or second transmission angle information of the second network device based on the PMI and beam quality information corresponding to the PMI reported by multiple terminals; then determine the first phase shift matrix according to the incident angle information of the transmitted signal, the second reflection angle information or the second transmission angle information of the second network device, and determine the phase shift matrix PMI corresponding to the first phase shift matrix; then send the phase shift matrix PMI as the fourth phase shift matrix indication information to the second network device, so that the second network device can directly configure the phase shift matrix according to the fourth phase shift matrix indication information, and perform signal processing on the transmitted signal of the first network device, thereby avoiding the use of complex algorithms for iterative calculations, thereby simplifying the precoding process of RIS, reducing the precoding complexity, and improving the precoding efficiency.

[0161] Figure 6 is a flow chart of a precoding method according to an embodiment of the present disclosure. The method is executed by a second network device, wherein the second network device may be a RIS, and may include the following steps.

[0162] Step 601: Receive phase shift matrix indication information sent by a first network device.

[0163] The phase shift matrix indication information may be determined by the terminal based on the terminal reporting information after receiving information reported by one or more terminals. The terminal reporting information may include the PMI for the second network device and the beam quality information corresponding to the PMI, etc. The phase shift matrix indication information is used to determine the phase shift matrix configuration of the second network device, so that the second network device performs signal reflection processing or signal transmission processing on the transmission signal of the first network device based on the phase shift matrix configuration. Specifically, the phase shift matrix indication information of the second network device may include any one of the first phase shift matrix indication information, the second phase shift matrix indication information, the third phase shift matrix indication information, and the fourth phase shift matrix indication information. The first phase shift matrix indication information may include: the incident angle information of the transmitted signal, and the precoding matrix indicator (PMI) for the second network device reported by multiple terminals and the beam quality information corresponding to the PMI; the second phase shift matrix indication information may include: the incident angle information of the transmitted signal, the second reflection angle information or the second transmission angle information of the second network device; the third phase shift matrix indication information may include: the phase shift matrix of the second network device; and the fourth phase shift matrix indication information may include the phase shift matrix PMI.

[0164] Step 602: Perform signal processing on the transmission signal of the first network device according to the phase shift matrix indication information.

[0165] In the embodiments of the present disclosure, the second network device may determine a phase shift matrix configuration based on any one of the first phase shift matrix indication information, the second phase shift matrix indication information, the third phase shift matrix indication information, and the fourth phase shift matrix indication information, and perform signal reflection processing or signal transmission processing on the transmit signal of the first network device based on the phase shift matrix configuration. The specific implementation process of the second network device processing the transmit signal of the first network device based on the first phase shift matrix indication information may be referred to in the relevant descriptions of steps 701 to 706 of the embodiment; the specific implementation process of the second network device processing the transmit signal of the first network device based on the second phase shift matrix indication information may be referred to in the relevant descriptions of steps 801 to 805 of the embodiment; the specific implementation process of the second network device processing the transmit signal of the first network device based on the third phase shift matrix indication information may be referred to in the relevant descriptions of steps 901 to 903 of the embodiment; and the specific implementation process of the second network device processing the transmit signal of the first network device based on the fourth phase shift matrix indication information may be referred to in the relevant descriptions of steps 1001 to 1005 of the embodiment.

[0166] In summary, according to the precoding method provided in the embodiments of the present disclosure, after receiving the phase shift matrix indication information sent by the first network device (base station), the second network device (RIS) can perform signal processing on the first network device's transmit signal based on the phase shift matrix indication information. Through simple data processing, the present disclosure enables the second network device to directly configure the phase shift matrix based on the phase shift matrix indication information and perform signal processing on the first network device's transmit signal. This avoids the use of complex algorithms for iterative calculations, thereby simplifying the RIS's precoding process, reducing precoding complexity, and improving precoding efficiency.

[0167] FIG7 shows a precoding method according to an embodiment of the present disclosure, which is performed by a second network device and is based on the embodiment shown in FIG6 , as shown in FIG7 , and may include the following steps.

[0168] Step 701: Receive first phase shift matrix indication information sent by a first network device, where the first phase shift matrix indication information includes incident angle information of a transmitted signal, and PMIs reported by multiple terminals for a second network device and beam quality information corresponding to the PMIs.

[0169] In a specific application scenario, the first network device may determine first phase shift matrix indication information through steps 201 to 204 of the embodiment and send the first phase shift matrix indication information to the second network device. Accordingly, the second network device may receive incident angle information of the transmitted signal, as well as PMIs and beam quality information corresponding to the PMIs reported by multiple terminals for the second network device.

[0170] Step 702: Determine second reflection angle information or second transmission angle information of the second network device according to the PMIs for the second network device and the beam quality information corresponding to the PMIs reported by multiple terminals.

[0171] In an embodiment of the present disclosure, when determining second reflection angle information or second transmission angle information of a second network device based on PMIs and beam quality information corresponding to the PMIs reported by multiple terminals for the second network device, the embodiment steps may specifically include: determining first reflection angle information or first transmission angle information of the multiple terminals based on the PMIs reported by the multiple terminals for the second network device; and determining second reflection angle information or second transmission angle information of the second network device based on the first reflection angle information or first transmission angle information of the multiple terminals and the PMIs and beam quality information corresponding to the PMIs reported by the multiple terminals for the second network device. The reflection angle information and the transmission angle information may be jointly represented from the perspective of two dimensions: the first dimension is the horizontal dimension, and the second dimension is the vertical dimension. That is, the first reflection angle information of the multiple terminals includes the first reflection angle information in the horizontal dimension and the first reflection angle information in the vertical dimension, and the first transmission angle information of the multiple terminals includes the first transmission angle information in the horizontal dimension and the first transmission angle information in the vertical dimension. Accordingly, the second reflection angle information of the second network device includes the second reflection angle information in the horizontal dimension and the second reflection angle information in the vertical dimension. The second transmission angle information of the second network device includes the second transmission angle information in the horizontal dimension and the second transmission angle information in the vertical dimension.

[0172] When determining the second reflection angle information or the second transmission angle information of the second network device, at least one of the PMIs for the second network device and the beam quality information corresponding to the PMIs reported by multiple terminals may be used together with the first reflection angle information or the first transmission angle information of the multiple terminals to determine the second reflection angle information or the second transmission angle information of the second network device. That is, the second reflection angle information or the second transmission angle information of the second network device may be determined using the beam quality information corresponding to the PMIs reported by multiple terminals and the first reflection angle information or the first transmission angle information of the multiple terminals; the second reflection angle information or the second transmission angle information of the second network device may also be determined using the PMIs for the second network device reported by multiple terminals and the first reflection angle information or the first transmission angle information of the multiple terminals; the second reflection angle information or the second transmission angle information of the second network device may also be determined using the PMIs for the second network device reported by multiple terminals and the beam quality information corresponding to the PMIs reported by multiple terminals together with the first reflection angle information or the first transmission angle information of the multiple terminals.

[0173] As a possible implementation, the second reflection angle information or second transmission angle information of the second network device can be determined using weighted methods. Specifically, a weight value for each terminal can be calculated based on at least one of the PMI of the second network device and the beam quality information corresponding to the PMI. The first reflection angle information or first transmission angle information of the multiple terminals can be weighted based on the weight value to determine the second reflection angle information or second transmission angle information of the second network device. Exemplarily, when calculating the weight value of each terminal according to the beam quality information corresponding to the PMI, taking the horizontal dimension and including three terminals as an example, the angles corresponding to the first reflection angle information of the horizontal dimension or the first transmission angle information of the horizontal dimension are α1, α2, and α3, respectively, and the corresponding beam qualities are b1, b2, and b3, respectively. The horizontal second reflection angle information or the horizontal second transmission angle information used by RIS is c1*α1+c2*α2+c3*α3, where c1, c2, c3∈[0,1], c1+c2+c3=1, c1, c2, c3 are the weights corresponding to α1, α2, and α3, which are determined according to b1, b2, and b3, where the weight determination example is: Correspondingly, the vertical dimension is determined in the same manner and will not be further described here. Accordingly, the embodiment steps may include: determining the beam weight of the terminal based on the PMI and beam quality information corresponding to the PMI reported by multiple terminals for the second network device; and performing weighted processing on the angle values ​​in the first reflection angle information or first transmission angle information of the multiple terminals according to the beam weight of the terminal to obtain the second reflection angle information or second transmission angle information of the second network device.

[0174] As a possible implementation, the direction with the best beam quality among the first reflection angle information or first transmission angle information corresponding to multiple terminals can be used as the second reflection angle information or second transmission angle information of the second network device. That is, in the corresponding weighted method, the weight of the first reflection angle information or first transmission angle information with the best beam quality is set to 1, and the weights of other directions are set to 0. The beam quality can be determined based on at least one of the PMI of the second network device and the beam quality information corresponding to the PMI. In an embodiment of the present disclosure, the horizontal first reflection angle information with the best beam quality among the multiple horizontal first reflection angle information corresponding to the multiple terminals can be determined as the horizontal second reflection angle information of the second network device; and the vertical first reflection angle information with the best beam quality among the multiple vertical first reflection angle information corresponding to the multiple terminals can be determined as the vertical second reflection angle information of the second network device. Accordingly, the embodiment may further include: based on the PMIs and beam quality information corresponding to the PMIs reported by the multiple terminals for the second network device, determining the first reflection angle information or first transmission angle information that meets preset conditions among the first reflection angle information or first transmission angle information of the multiple terminals as the second reflection angle information or second transmission angle information of the second network device. Among them, the preset condition may be optimal beam quality, or other screening conditions may be set in combination with actual application scenarios, which are not exhaustively listed here.

[0175] Step 703: Determine a first phase shift matrix according to the incident angle information of the transmitted signal and the second reflection angle information or the second transmission angle information of the second network device.

[0176] For the embodiments of the present disclosure, as a possible implementation method, a first phase shift matrix for supporting signal reflection processing can be calculated based on the incident angle information of the transmitted signal and the second reflection angle information of the second network device; as a possible implementation method, a first phase shift matrix for supporting signal transmission processing can be calculated based on the incident angle information of the transmitted signal and the second transmission angle information of the second network device.

[0177] Step 704: Perform phase shift quantization processing on the first phase shift matrix to obtain a second phase shift matrix of the second network device.

[0178] In specific application scenarios, since the first phase-shift matrix is ​​a continuous phase-shift matrix calculated based on the continuous phase incident angle information, the second reflection angle information, or the second transmission angle information, and the phase of the RIS can only be at a few discrete phases, after calculating the first phase-shift matrix, it is necessary to perform phase-shift quantization on the first phase-shift matrix to quantize the phase shift of each element in the first phase-shift matrix to a phase shift supported by the RIS. Specifically, based on the minimum distance criterion, the phase shift of each element in the first phase-shift matrix can be quantized to the discrete phase shift closest to the calculated phase shift. After the phase-shift quantization is completed, the second phase-shift matrix of the second network device is further obtained.

[0179] Step 705: Determine a phase shift matrix configuration according to the second phase shift matrix.

[0180] Step 706: Perform signal processing on the transmission signal of the first network device based on the phase shift matrix configuration, where the signal processing includes signal reflection processing or signal transmission processing.

[0181] For the embodiments of the present disclosure, if the second phase shift matrix is ​​a phase shift matrix that supports signal reflection processing, correspondingly, signal reflection processing can be performed on the transmitted signal of the first network device based on the phase shift matrix configuration determined by the second phase shift matrix; if the second phase shift matrix is ​​a phase shift matrix that supports signal transmission processing, correspondingly, signal transmission processing can be performed on the transmitted signal of the first network device based on the phase shift matrix configuration determined by the second phase shift matrix.

[0182] In summary, according to the precoding method provided in the embodiments of the present disclosure, after receiving the first phase shift matrix indication information sent by the first network device (base station), the second network device (RIS) can generate a phase shift matrix configuration based on the first phase shift matrix indication information and perform signal processing on the first network device's transmit signal based on the phase shift matrix configuration. The present disclosure enables simple data processing to enable the second network device to directly perform phase shift matrix configuration based on the first phase shift matrix indication information and perform signal processing on the first network device's transmit signal. This avoids the use of complex algorithms for iterative calculations, thereby simplifying the RIS's precoding process, reducing precoding complexity, and improving precoding efficiency.

[0183] FIG8 shows a precoding method according to an embodiment of the present disclosure, which is performed by a second network device and is based on the embodiment shown in FIG6 , as shown in FIG8 , and may include the following steps.

[0184] Step 801: Receive second phase shift matrix indication information sent by a first network device, where the second phase shift matrix indication information includes incident angle information of a transmitted signal, second reflection angle information or second transmission angle information of a second network device.

[0185] In a specific application scenario, the first network device may determine the second phase shift matrix indication information through steps 301 to 304 of the embodiment and send the second phase shift matrix indication information to the second network device. Accordingly, the second network device may receive the incident angle information of the transmitted signal, the second reflection angle information of the second network device, or the second transmission angle information.

[0186] Step 802: Determine a first phase shift matrix according to incident angle information of the transmitted signal and second reflection angle information or second transmission angle information of the second network device.

[0187] Step 803: Perform phase shift quantization processing on the first phase shift matrix to obtain a second phase shift matrix of the second network device.

[0188] Step 804: Determine a phase shift matrix configuration according to the second phase shift matrix.

[0189] Step 805: Perform signal processing on the transmission signal of the first network device based on the phase shift matrix configuration, where the signal processing includes signal reflection processing or signal transmission processing.

[0190] In summary, according to the precoding method provided in the embodiments of the present disclosure, after receiving the second phase shift matrix indication information sent by the first network device (base station), the second network device (RIS) can generate a phase shift matrix configuration based on the second phase shift matrix indication information and perform signal processing on the first network device's transmit signal based on the phase shift matrix configuration. The present disclosure enables simple data processing to enable the second network device to directly perform phase shift matrix configuration based on the second phase shift matrix indication information and perform signal processing on the first network device's transmit signal. This avoids the use of complex algorithms for iterative calculations, thereby simplifying the RIS's precoding process, reducing precoding complexity, and improving precoding efficiency.

[0191] FIG9 shows a precoding method according to an embodiment of the present disclosure, which is performed by a second network device and is based on the embodiment shown in FIG6 , as shown in FIG9 , and may include the following steps.

[0192] Step 901: Receive third phase shift matrix indication information sent by a first network device, where the third phase shift matrix indication information includes a second phase shift matrix.

[0193] In a specific application scenario, the first network device may determine the third phase shift matrix indication information through steps 401 to 406 of the embodiment and send the third phase shift matrix indication information to the second network device. Accordingly, the second network device may receive the second phase shift matrix.

[0194] Step 902: Determine a phase shift matrix configuration according to the second phase shift matrix.

[0195] Step 903: Perform signal processing on the transmission signal of the first network device based on the phase shift matrix configuration, where the signal processing includes signal reflection processing or signal transmission processing.

[0196] In summary, according to the precoding method provided in the embodiments of the present disclosure, after receiving the third phase shift matrix indication information sent by the first network device (base station), the second network device (RIS) can generate a phase shift matrix configuration based on the third phase shift matrix indication information and perform signal processing on the first network device's transmit signal based on the phase shift matrix configuration. The present disclosure enables simple data processing to enable the second network device to directly perform phase shift matrix configuration based on the third phase shift matrix indication information and perform signal processing on the first network device's transmit signal. This avoids the use of complex algorithms for iterative calculations, thereby simplifying the RIS's precoding process, reducing precoding complexity, and improving precoding efficiency.

[0197] FIG10 shows a precoding method according to an embodiment of the present disclosure, which is performed by a second network device and is based on the embodiment shown in FIG6 , as shown in FIG10 , and may include the following steps.

[0198] Step 1001: Receive fourth phase shift matrix indication information sent by a first network device, where the fourth phase shift matrix indication information includes a phase shift matrix PMI.

[0199] In a specific application scenario, the first network device may determine the fourth phase shift matrix indication information through steps 501 to 506 of the embodiment and send the fourth phase shift matrix indication information to the second network device. Accordingly, the second network device may receive the phase shift matrix PMI.

[0200] Step 1002: Determine a first phase shift matrix according to the phase shift matrix PMI.

[0201] Step 1003: Perform phase shift quantization processing on the first phase shift matrix to obtain a second phase shift matrix of the second network device.

[0202] In specific application scenarios, since the first phase-shift matrix is ​​a continuous phase-shift matrix calculated based on the continuous phase incident angle information, the second reflection angle information, or the second transmission angle information, and the phase of the RIS can only be at a few discrete phases, after calculating the first phase-shift matrix, it is necessary to perform phase-shift quantization on the first phase-shift matrix to quantize the phase shift of each element in the first phase-shift matrix to a phase shift supported by the RIS. Specifically, based on the minimum distance criterion, the phase shift of each element in the first phase-shift matrix can be quantized to the discrete phase shift closest to the calculated phase shift. After the phase-shift quantization is completed, the second phase-shift matrix of the second network device is further obtained.

[0203] Step 1004: Determine a phase shift matrix configuration according to the second phase shift matrix.

[0204] Step 1005: Perform signal processing on the transmission signal of the first network device based on the phase shift matrix configuration, where the signal processing includes signal reflection processing or signal transmission processing.

[0205] In summary, according to the precoding method provided in the embodiments of the present disclosure, after receiving the fourth phase shift matrix indication information sent by the first network device (base station), the second network device (RIS) can generate a phase shift matrix configuration based on the fourth phase shift matrix indication information and perform signal processing on the first network device's transmit signal based on the phase shift matrix configuration. This disclosure enables the second network device to directly configure the phase shift matrix based on the fourth phase shift matrix indication information and perform signal processing on the first network device's transmit signal. This avoids the use of complex algorithms for iterative calculations, thereby simplifying the RIS's precoding process, reducing precoding complexity, and improving precoding efficiency.

[0206] Figure 11 is a flow chart of a precoding method according to an embodiment of the present disclosure. The method is executed by a terminal and may include the following steps.

[0207] Step 1101: Report the PMI of the second network device and the beam quality information corresponding to the PMI to the first network device.

[0208] For the embodiments of the present disclosure, the terminal may report the PMI and beam quality information corresponding to the PMI for the second network device to the first network device, so that the first network device determines the phase shift matrix indication information of the second network device based on the information reported by the terminal, and after sending the phase shift matrix indication information to the second network device, the second network device can perform signal processing on the transmission signal of the first network device according to the phase shift matrix indication information.

[0209] In summary, according to the precoding method provided by the embodiment of the present disclosure, the terminal reports the PMI for the second network device and the beam quality information corresponding to the PMI to the first network device, uses the first network device to determine the phase shift matrix indication information of the second network device, and sends the phase shift matrix indication information to the second network device (RIS), so that the second network device can perform signal processing on the transmit signal of the first network device according to the phase shift matrix indication information. The present disclosure can determine the phase shift matrix indication information containing precoding information in the first network device through simple data processing, so that the second network device can directly configure the phase shift matrix according to the phase shift matrix indication information and perform signal processing on the transmit signal of the first network device. Therefore, the present disclosure can avoid the use of complex algorithms for iterative calculations, thereby simplifying the precoding process of the RIS, reducing the precoding complexity, and improving the precoding efficiency.

[0210] Corresponding to the precoding methods provided in the above embodiments, the complete implementation process of the present disclosure may be as follows:

[0211] (1) One or more terminals report a precoding matrix identifier (PMI) and beam quality information corresponding to the PMI for a second network device to the first network device.

[0212] Among them, the beam quality information corresponding to the PMI is used to reflect the quality of beam transmission. In specific application scenarios, it can be measured using Reference Signal Receiving Power (RSRP), Signal to Interference plus Noise Ratio (SINR), Reference Signal Received Quality (RSRQ), Received Signal Strength Indicator (RSSI), etc. Exemplarily, as a possible implementation method, one of the above information can be used as the beam quality information corresponding to the PMI; as a possible implementation method, multiple types of the above information can also be fused through a preset algorithm (such as weighted fusion, etc.) to obtain the beam quality information corresponding to the PMI.

[0213] (2) Determine the first reflection angle information or the first transmission angle information corresponding to each terminal according to the PMI for the second network device reported by one or more terminals and the beam quality information corresponding to the PMI.

[0214] (3) Determine the second reflection angle information or the second transmission angle information of the second network device based on the first reflection angle information or the first transmission angle information of the multiple terminals, and the PMI and beam quality information corresponding to the PMI reported by the multiple terminals for the second network device.

[0215] For the embodiments of the present disclosure, please refer to the relevant description in step 302 or 702 of the embodiment, which will not be repeated here.

[0216] (4) Determine a first phase shift matrix according to the incident angle information of the transmitted signal, the second reflection angle information or the second transmission angle information of the second network device.

[0217] (5) Quantize the phase shift of each unit in the first phase shift matrix to the phase shift supported by RIS to obtain the second phase shift matrix.

[0218] (6) The first network device sends the phase shift matrix indication information to the second network device.

[0219] Among them, the phase shift matrix indication information may include any one of the first phase shift matrix indication information, the second phase shift matrix indication information, the third phase shift matrix indication information and the fourth phase shift matrix indication information. The first phase shift matrix indication information may include: the incident angle information of the transmitted signal, and the precoding matrix identifier (Precoding Matrix Indicator, PMI) for the second network device reported by multiple terminals and the beam quality information corresponding to the PMI; the second phase shift matrix indication information may include: the incident angle information of the transmitted signal, the second reflection angle information or the second transmission angle information of the second network device; the third phase shift matrix indication information may include: the phase shift matrix of the second network device; the fourth phase shift matrix indication information may include the phase shift matrix PMI.

[0220] For the embodiment of the present disclosure, as a possible implementation method, when the first network device determines the first phase shift matrix indication information and sends the first phase shift matrix indication information to the second network device (see steps 201 to 204 of the embodiment), the corresponding steps (2) to (5) above can be executed on the second network device (see steps 701 to 706 of the embodiment).

[0221] As a possible implementation method, when the first network device determines the second phase shift matrix indication information and sends the second phase shift matrix indication information to the second network device (see steps 301 to 304 of the embodiment), the corresponding steps (4) to (5) above can be performed on the second network device (see steps 801 to 805 of the embodiment).

[0222] As a possible implementation method, when the first network device determines the third phase shift matrix indication information and sends the third phase shift matrix indication information to the second network device (see steps 401 to 406 of the embodiment), the second network device can directly receive the second phase shift matrix and then continue to execute step (7) (see steps 902 to 903 of the embodiment).

[0223] As a possible implementation method, when the first network device determines the fourth phase shift matrix indication information and sends the fourth phase shift matrix indication information to the second network device (see steps 501 to 506 of the embodiment), the second network device may execute steps 1002 to 1003 of the embodiment to obtain the second phase shift matrix of the second network device, and then further execute steps 1004 to 1005 of the embodiment to determine the phase shift matrix configuration according to the second phase shift matrix; and perform signal processing on the transmitted signal of the first network device based on the phase shift matrix configuration, wherein the signal processing includes signal reflection processing or signal transmission processing.

[0224] (7) The second network device performs signal processing on the transmission signal of the first network device according to the received phase shift matrix indication information.

[0225] In summary, according to the precoding method provided in the embodiment of the present disclosure, phase shift matrix indication information containing precoding information can be determined in the first network device or the second network device through simple data processing, thereby avoiding the use of complex algorithms for iterative calculations, thereby simplifying the RIS precoding process, reducing precoding complexity, and improving precoding efficiency.

[0226] In the embodiments provided above, the methods provided in the embodiments of the present application are introduced from the perspectives of the first network device (base station), the second network device (RIS), and the terminal. In order to implement the various functions in the methods provided in the embodiments of the present application, the first network device (base station), the second network device (RIS), and the terminal may include hardware structures and software modules, and implement the above functions in the form of hardware structures, software modules, or hardware structures plus software modules. A certain function in the above functions can be executed in the form of hardware structures, software modules, or hardware structures plus software modules.

[0227] Corresponding to the precoding methods provided in the above-mentioned embodiments, the present disclosure also provides a first network device, a second network device and a terminal. Since the first network device, the second network device and the terminal provided in the embodiments of the present disclosure correspond to the precoding methods provided in the above-mentioned embodiments, the implementation method of the precoding method is also applicable to the power determination device of the side link provided in this embodiment, and will not be described in detail in this embodiment.

[0228] FIG12 is a schematic structural diagram of a first network device 1200 provided according to an embodiment of the present disclosure.

[0229] As shown in FIG12 , the first network device 1200 may include:

[0230] The processing module 1210 may be configured to determine phase shift matrix indication information of the second network device;

[0231] The sending module 1220 may be configured to send the phase shift matrix indication information to the second network device.

[0232] In some embodiments of the present disclosure, the phase shift matrix indication information is first phase shift matrix indication information, and the first phase shift matrix indication information includes the incident angle information of the transmitted signal, and the PMI for the second network device reported by multiple terminals and the beam quality information corresponding to the PMI. The processing module 1210 can be used to determine the incident angle information of the transmitted signal; determine that the incident angle information of the transmitted signal, and the PMI for the second network device reported by multiple terminals and the beam quality information corresponding to the PMI are the first phase shift matrix indication information.

[0233] In some embodiments of the present disclosure, the phase shift matrix indication information is second phase shift matrix indication information, and the second phase shift matrix indication information includes the incident angle information of the transmitted signal, the second reflection angle information of the second network device, or the second transmission angle information. The processing module 1210 can be used to determine the incident angle information of the transmitted signal; and determine the second reflection angle information or the second transmission angle information of the second network device based on the PMI reported by multiple terminals for the second network device and the beam quality information corresponding to the PMI; determine that the incident angle information of the transmitted signal, the second reflection angle information, or the second transmission angle information of the second network device is the second phase shift matrix indication information.

[0234] In some embodiments of the present disclosure, the phase shift matrix indication information is third phase shift matrix indication information, and the third phase shift matrix indication information includes the second phase shift matrix. The processing module 1210 can be used to determine the second reflection angle information or the second transmission angle information of the second network device based on the PMI reported by multiple terminals and the beam quality information corresponding to the PMI for the second network device; determine the first phase shift matrix based on the incident angle information of the transmitted signal, the second reflection angle information or the second transmission angle information of the second network device; perform phase shift quantization processing on the first phase shift matrix to obtain the second phase shift matrix of the second network device; and determine that the second phase shift matrix is ​​the third phase shift matrix indication information.

[0235] In some embodiments of the present disclosure, the phase shift matrix indication information is fourth phase shift matrix indication information, and the fourth phase shift matrix indication information includes the phase shift matrix PMI. The processing module 1210 can be used to determine the second reflection angle information or the second transmission angle information of the second network device based on the PMI reported by multiple terminals and the beam quality information corresponding to the PMI for the second network device; determine the first phase shift matrix based on the incident angle information of the transmitted signal, the second reflection angle information or the second transmission angle information of the second network device; determine the phase shift matrix PMI corresponding to the first phase shift matrix; and determine that the phase shift matrix PMI is the fourth phase shift matrix indication information.

[0236] In some embodiments of the present disclosure, as shown in FIG12 , the first network device 1200 further includes: a receiving module 1220;

[0237] The receiving module 1220 may be configured to receive PMIs for the second network device and beam quality information corresponding to the PMIs reported by multiple terminals.

[0238] In some embodiments of the present disclosure, the processing module 1210 can be used to determine the first reflection angle information or the first transmission angle information of multiple terminals based on the PMI for the second network device reported by the multiple terminals; determine the second reflection angle information or the second transmission angle information of the second network device based on the first reflection angle information or the first transmission angle information of the multiple terminals, and the PMI for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMI.

[0239] In some embodiments of the present disclosure, the processing module 1210 can be used to determine the beam weight of the terminal based on the PMI reported by multiple terminals for the second network device and the beam quality information corresponding to the PMI; according to the beam weight of the terminal, the angle values ​​in the first reflection angle information or the first transmission angle information of the multiple terminals are weighted to obtain the second reflection angle information or the second transmission angle information of the second network device.

[0240] In some embodiments of the present disclosure, the processing module 1210 can be used to determine the first reflection angle information or first transmission angle information that meets the preset conditions in the first reflection angle information or first transmission angle information of the multiple terminals based on the PMI for the second network device and the beam quality information corresponding to the PMI reported by the multiple terminals, as the second reflection angle information or second transmission angle information of the second network device.

[0241] In some embodiments of the present disclosure, the sending module 1220 may be configured to send any one of the first phase shift matrix indication information, the second phase shift matrix indication information, the third phase shift matrix indication information, and the fourth phase shift matrix indication information to the second network device.

[0242] FIG13 is a schematic structural diagram of a second network device 1300 provided according to an embodiment of the present disclosure.

[0243] As shown in FIG13 , the second network device 1300 may include:

[0244] The receiving module 1310 is configured to receive phase shift matrix indication information sent by the first network device;

[0245] The processing module 1320 may be configured to perform signal processing on the transmission signal of the first network device according to the phase shift matrix indication information.

[0246] In some embodiments of the present disclosure, the phase shift matrix indication information is first phase shift matrix indication information, and the first phase shift matrix indication information includes incident angle information of the transmitted signal, and PMI reported by multiple terminals for the second network device and beam quality information corresponding to the PMI. The receiving module 1310 can be used to receive the incident angle information of the transmitted signal sent by the first network device, and PMI reported by multiple terminals for the second network device and beam quality information corresponding to the PMI.

[0247] In some embodiments of the present disclosure, the processing module 1320 may be used to determine second reflection angle information or second transmission angle information of the second network device based on the PMI and beam quality information corresponding to the PMI reported by multiple terminals for the second network device; determine a first phase shift matrix based on the incident angle information of the transmitted signal, the second reflection angle information or the second transmission angle information of the second network device; perform phase shift quantization processing on the first phase shift matrix to obtain a second phase shift matrix of the second network device; determine a phase shift matrix configuration based on the second phase shift matrix; and perform signal processing on the transmitted signal of the first network device based on the phase shift matrix configuration, wherein the signal processing includes signal reflection processing or signal transmission processing.

[0248] In some embodiments of the present disclosure, the processing module 1320 can be used to determine the first reflection angle information or the first transmission angle information of multiple terminals based on the PMI for the second network device reported by multiple terminals; determine the second reflection angle information or the second transmission angle information of the second network device based on the first reflection angle information or the first transmission angle information of the multiple terminals, and the PMI for the second network device reported by multiple terminals and the beam quality information corresponding to the PMI.

[0249] In some embodiments of the present disclosure, the processing module 1320 can be used to determine the beam weight of the terminal based on the PMI reported by multiple terminals for the second network device and the beam quality information corresponding to the PMI; according to the beam weight of the terminal, the angle values ​​in the first reflection angle information or the first transmission angle information of the multiple terminals are weighted to obtain the second reflection angle information or the second transmission angle information of the second network device.

[0250] In some embodiments of the present disclosure, the processing module 1320 can be used to determine the first reflection angle information or first transmission angle information that meets the preset conditions in the first reflection angle information or first transmission angle information of the multiple terminals based on the PMI for the second network device and the beam quality information corresponding to the PMI reported by the multiple terminals, as the second reflection angle information or second transmission angle information of the second network device.

[0251] In some embodiments of the present disclosure, the phase shift matrix indication information is second phase shift matrix indication information, and the second phase shift matrix indication information includes the incident angle information of the transmitted signal, the second reflection angle information or the second transmission angle information of the second network device. The receiving module 1310 can be used to receive the incident angle information of the transmitted signal sent by the first network device, the second reflection angle information or the second transmission angle information of the second network device.

[0252] In some embodiments of the present disclosure, the processing module 1320 may be configured to determine a first phase shift matrix based on incident angle information of a transmitted signal, second reflection angle information, or second transmission angle information of a second network device; perform phase shift quantization processing on the first phase shift matrix to obtain a second phase shift matrix for the second network device; determine a phase shift matrix configuration based on the second phase shift matrix; and perform signal processing on the transmitted signal of the first network device based on the phase shift matrix configuration, wherein the signal processing includes signal reflection processing or signal transmission processing.

[0253] In some embodiments of the present disclosure, the phase shift matrix indication information is third phase shift matrix indication information, and the third phase shift matrix indication information includes a second phase shift matrix. The receiving module 1310 may be configured to receive the second phase shift matrix sent by the first network device.

[0254] In some embodiments of the present disclosure, the processing module 1320 may be configured to determine a phase shift matrix configuration according to the second phase shift matrix; and perform signal processing on a transmission signal of the first network device based on the phase shift matrix configuration, wherein the signal processing includes signal reflection processing or signal transmission processing.

[0255] In some embodiments of the present disclosure, the phase shift matrix indication information is fourth phase shift matrix indication information, and the fourth phase shift matrix indication information includes a phase shift matrix PMI. The receiving module 1310 may be configured to receive the phase shift matrix PMI sent by the first network device.

[0256] In some embodiments of the present disclosure, the processing module 1320 may be configured to determine a first phase shift matrix based on the phase shift matrix PMI; perform phase shift quantization processing on the first phase shift matrix to obtain a second phase shift matrix for the second network device; determine a phase shift matrix configuration based on the second phase shift matrix; and perform signal processing on a transmitted signal of the first network device based on the phase shift matrix configuration, wherein the signal processing includes signal reflection processing or signal transmission processing.

[0257] FIG14 is a schematic structural diagram of a terminal 1400 provided according to an embodiment of the present disclosure.

[0258] As shown in FIG14 , the terminal 1400 may include:

[0259] The sending module 1410 may be configured to report the PMI of the second network device and beam quality information corresponding to the PMI to the first network device.

[0260] Please refer to Figure 15, which is a schematic diagram of the structure of a communication device 1500 provided in an embodiment of the present application. Communication device 1500 can be a network device or a user device, or a chip, chip system, or processor that supports the network device to implement the above method. It can also be a chip, chip system, or processor that supports the user device to implement the above method. This device can be used to implement the method described in the above method embodiment. For details, please refer to the description of the above method embodiment.

[0261] The communication device 1500 may include one or more processors 1501. The processor 1501 may be a general-purpose processor or a dedicated processor. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control the communication device (e.g., a base station, a baseband chip, a terminal device, a terminal device chip, a DU or CU, etc.), execute computer programs, and process computer program data.

[0262] Optionally, the communication device 1500 may further include one or more memories 1502, on which a computer program 1504 may be stored. The processor 1501 executes the computer program 1504, causing the communication device 1500 to perform the method described in the above method embodiment. Optionally, the memory 1502 may also store data. The communication device 1500 and the memory 1502 may be provided separately or integrated together.

[0263] Optionally, the communication device 1500 may further include a transceiver 1505 and an antenna 1506. The transceiver 1505 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, and is configured to implement transceiver functions. The transceiver 1505 may include a receiver and a transmitter. The receiver may be referred to as a receiver or a receiving circuit, and is configured to implement a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, and is configured to implement a transmitting function.

[0264] Optionally, the communication device 1500 may further include one or more interface circuits 1507. The interface circuit 1507 is configured to receive code instructions and transmit the instructions to the processor 1501. The processor 1501 executes the code instructions to enable the communication device 1500 to perform the method described in the above method embodiment.

[0265] In one implementation, processor 1501 may include a transceiver for implementing receiving and transmitting functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing the receiving and transmitting functions may be separate or integrated. The transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or may be used for transmitting or delivering signals.

[0266] In one implementation, processor 1501 may store a computer program 1503. Computer program 1503, when executed on processor 1501, enables communication device 1500 to perform the method described in the above method embodiment. Computer program 1503 may be embedded in processor 1501, in which case processor 1501 may be implemented by hardware.

[0267] In one implementation, the communication device 1500 may include a circuit that can implement the functions of sending, receiving, or communicating in the aforementioned method embodiments. The processor and transceiver described in this application can be implemented on an integrated circuit (IC), an analog IC, a radio frequency integrated circuit RFIC, a mixed signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (nMetal-oxide-semiconductor, NMOS), P-type metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0268] The communication device described in the above embodiments may be a network device or a user device, but the scope of the communication device described in this application is not limited thereto, and the structure of the communication device may not be limited to FIG15. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be:

[0269] (1) An independent integrated circuit (IC), or chip, or chip system or subsystem;

[0270] (2) a collection of one or more ICs, optionally including a storage component for storing data and computer programs;

[0271] (3) ASIC, such as modem;

[0272] (4) Modules that can be embedded in other devices;

[0273] (5) Receivers, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.;

[0274] (6)Others, etc.

[0275] If the communication device can be a chip or a chip system, please refer to the schematic diagram of the chip structure shown in Figure 16. The chip shown in Figure 16 includes a processor 1601 and an interface 1602. The number of processors 1601 can be one or more, and the number of interfaces 1602 can be multiple.

[0276] Optionally, the chip further includes a memory 1603, which is used to store necessary computer programs and data.

[0277] Those skilled in the art will also appreciate that the various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functions are implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the functions for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of the present application.

[0278] The present application also provides a readable storage medium having instructions stored thereon, which implement the functions of any of the above method embodiments when executed by a computer.

[0279] The present application also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0280] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, all or part of the processes or functions according to the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. Available media may be magnetic media (eg, floppy disks, hard disks, tapes), optical media (eg, high-density digital video discs (DVDs)), or semiconductor media (eg, solid state disks (SSDs)).

[0281] Those skilled in the art will understand that the various numerical numbers such as first and second involved in this application are only for the convenience of description and are not used to limit the scope of the embodiments of this application, and also indicate the order of precedence.

[0282] In this application, at least one can also be described as one or more, and multiple can be two, three, four or more, which is not limited in this application. In the embodiments of this application, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", and there is no order of precedence or size between the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0283] As used herein, the terms "machine-readable medium" and "computer-readable medium" refer to any computer program product, apparatus, and / or device (e.g., a magnetic disk, an optical disk, a memory, a programmable logic device (PLD)) for providing machine instructions and / or data to a programmable processor, including a machine-readable medium that receives machine instructions as a machine-readable signal. The term "machine-readable signal" refers to any signal for providing machine instructions and / or data to a programmable processor.

[0284] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), and the Internet.

[0285] Computer systems may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The client and server relationship arises through computer programs running on the respective computers and having a client-server relationship to each other.

[0286] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this disclosure can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved. This is not limited herein.

[0287] Furthermore, it should be understood that the various embodiments of the present application may be implemented individually or in combination with other embodiments where the solution permits.

[0288] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0289] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0290] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A precoding method, characterized in that: The method is performed by a first network device, and the method includes: Determining phase shift matrix indication information of the second network device; The phase shift matrix indication information is sent to the second network device.

2. The method according to claim 1, characterized in that The phase shift matrix indication information is first phase shift matrix indication information, where the first phase shift matrix indication information includes incident angle information of a transmitted signal, and PMIs for a second network device reported by multiple terminals and beam quality information corresponding to the PMIs. Determining the phase shift matrix indication information of the second network device includes: Determining incident angle information of the transmitted signal; The incident angle information of the transmitted signal, and the PMIs for the second network device reported by multiple terminals and the beam quality information corresponding to the PMIs are determined as the first phase shift matrix indication information.

3. The method according to claim 1, characterized in that The phase shift matrix indication information is second phase shift matrix indication information, the second phase shift matrix indication information includes incident angle information of the transmitted signal, second reflection angle information or second transmission angle information of the second network device, and determining the phase shift matrix indication information of the second network device includes: determining incident angle information of the transmitted signal; and Determining second reflection angle information or second transmission angle information of the second network device according to PMIs for the second network device reported by multiple terminals and beam quality information corresponding to the PMIs; The incident angle information of the transmitted signal, the second reflection angle information or the second transmission angle information of the second network device is determined as the second phase shift matrix indication information.

4. The method according to claim 1, wherein The phase shift matrix indication information is third phase shift matrix indication information, the third phase shift matrix indication information includes the second phase shift matrix, and determining the phase shift matrix indication information of the second network device includes: Determining second reflection angle information or second transmission angle information of the second network device according to PMIs for the second network device reported by multiple terminals and beam quality information corresponding to the PMIs; Determine a first phase shift matrix according to incident angle information of the transmitted signal and second reflection angle information or second transmission angle information of the second network device; performing phase shift quantization processing on the first phase shift matrix to obtain a second phase shift matrix of a second network device; Determine that the second phase shift matrix is ​​the third phase shift matrix indication information.

5. The method according to claim 1, wherein The phase shift matrix indication information is fourth phase shift matrix indication information, the fourth phase shift matrix indication information includes a phase shift matrix PMI, and determining the phase shift matrix indication information of the second network device includes: Determining second reflection angle information or second transmission angle information of the second network device according to PMIs for the second network device reported by multiple terminals and beam quality information corresponding to the PMIs; Determine a first phase shift matrix according to incident angle information of the transmitted signal and second reflection angle information or second transmission angle information of the second network device; Determine a phase shift matrix PMI corresponding to the first phase shift matrix; The phase shift matrix PMI is determined as the fourth phase shift matrix indication information.

6. The method according to any one of claims 2 to 5, characterized in that The method further comprises: Receive PMIs for the second network device and beam quality information corresponding to the PMIs reported by multiple terminals.

7. The method according to any one of claims 3 to 5, characterized in that The determining, according to the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs, second reflection angle information or second transmission angle information of the second network device includes: Determining first reflection angle information or first transmission angle information of the plurality of terminals according to PMIs for the second network device reported by the plurality of terminals; The second reflection angle information or the second transmission angle information of the second network device is determined according to the first reflection angle information or the first transmission angle information of the multiple terminals, and the PMI for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMI.

8. The method according to claim 7, characterized in that The determining, based on the first reflection angle information or the first transmission angle information of the multiple terminals, and the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs, the second reflection angle information or the second transmission angle information of the second network device includes: Determining a beam weight of the terminal based on the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs; According to the beam weight of the terminal, weighted processing is performed on the angle values ​​in the first reflection angle information or the first transmission angle information of the multiple terminals to obtain the second reflection angle information or the second transmission angle information of the second network device.

9. The method according to claim 7, characterized in that The determining, based on the first reflection angle information or the first transmission angle information of the multiple terminals, and the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs, the second reflection angle information or the second transmission angle information of the second network device includes: Based on the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs, the first reflection angle information or the first transmission angle information that meets the preset conditions is determined among the first reflection angle information or the first transmission angle information of the multiple terminals as the second reflection angle information or the second transmission angle information of the second network device.

10. The method according to any one of claims 2 to 9, characterized in that The sending the phase shift matrix indication information to the second network device includes: Any one of the first phase shift matrix indication information, the second phase shift matrix indication information, the third phase shift matrix indication information, and the fourth phase shift matrix indication information is sent to the second network device.

11. A precoding method, characterized in that: The method is performed by a second network device, and the method includes: Receiving phase shift matrix indication information sent by the first network device; Signal processing is performed on a transmission signal of the first network device according to the phase shift matrix indication information.

12. The method according to claim 11, characterized in that The phase shift matrix indication information is first phase shift matrix indication information, where the first phase shift matrix indication information includes incident angle information of a transmitted signal, and PMIs for a second network device reported by multiple terminals and beam quality information corresponding to the PMIs. The receiving of the phase shift matrix indication information sent by the first network device includes: Receive incident angle information of a transmission signal sent by a first network device, and PMIs for a second network device reported by multiple terminals and beam quality information corresponding to the PMIs.

13. The method according to claim 12, characterized in that The performing signal processing according to the phase shift matrix indication information includes: Determining second reflection angle information or second transmission angle information of the second network device according to the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs; Determine a first phase shift matrix according to the incident angle information of the transmitted signal and the second reflection angle information or the second transmission angle information of the second network device; performing phase shift quantization processing on the first phase shift matrix to obtain a second phase shift matrix of a second network device; determining a phase shift matrix configuration according to the second phase shift matrix; Signal processing is performed on the transmission signal of the first network device based on the phase shift matrix configuration, wherein the signal processing includes signal reflection processing or signal transmission processing.

14. The method according to claim 13, characterized in that The determining, according to the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs, second reflection angle information or second transmission angle information of the second network device includes: Determining first reflection angle information or first transmission angle information of the multiple terminals according to the PMIs for the second network device reported by the multiple terminals; The second reflection angle information or the second transmission angle information of the second network device is determined according to the first reflection angle information or the first transmission angle information of the multiple terminals, and the PMI for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMI.

15. The method according to claim 14, characterized in that The determining, based on the first reflection angle information or the first transmission angle information of the multiple terminals, and the PMI and the beam quality information for the second network device reported by the multiple terminals, the second reflection angle information or the second transmission angle information of the second network device includes: Determining a beam weight of the terminal based on the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs; According to the beam weight of the terminal, weighted processing is performed on the angle values ​​in the first reflection angle information or the first transmission angle information of the multiple terminals to obtain the second reflection angle information or the second transmission angle information of the second network device.

16. The method according to claim 14, characterized in that The determining, based on the first reflection angle information or the first transmission angle information of the multiple terminals, and the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs, the second reflection angle information or the second transmission angle information of the second network device includes: Based on the PMIs for the second network device reported by the multiple terminals and the beam quality information corresponding to the PMIs, the first reflection angle information or the first transmission angle information that meets the preset conditions is determined among the first reflection angle information or the first transmission angle information of the multiple terminals as the second reflection angle information or the second transmission angle information of the second network device.

17. The method according to claim 11, characterized in that The phase shift matrix indication information is second phase shift matrix indication information, the second phase shift matrix indication information includes incident angle information of the transmitted signal, second reflection angle information or second transmission angle information of the second network device, and the receiving of the phase shift matrix indication information sent by the first network device includes: Receive incident angle information of a transmission signal sent by the first network device and second reflection angle information or second transmission angle information of the second network device.

18. The method according to claim 17, characterized in that The performing signal processing according to the phase shift matrix indication information includes: Determine a first phase shift matrix according to the incident angle information of the transmitted signal and the second reflection angle information or the second transmission angle information of the second network device; performing phase shift quantization processing on the first phase shift matrix to obtain a second phase shift matrix of a second network device; determining a phase shift matrix configuration according to the second phase shift matrix; Signal processing is performed on the transmission signal of the first network device based on the phase shift matrix configuration, wherein the signal processing includes signal reflection processing or signal transmission processing.

19. The method according to claim 11, wherein The phase shift matrix indication information is third phase shift matrix indication information, the third phase shift matrix indication information includes the second phase shift matrix, and the receiving of the phase shift matrix indication information sent by the first network device includes: A second phase shift matrix sent by the first network device is received.

20. The method according to claim 19, wherein The performing signal processing according to the phase shift matrix indication information includes: determining a phase shift matrix configuration according to the second phase shift matrix; Signal processing is performed on the transmission signal of the first network device based on the phase shift matrix configuration, wherein the signal processing includes signal reflection processing or signal transmission processing.

21. The method according to claim 11, wherein The phase shift matrix indication information is fourth phase shift matrix indication information, the fourth phase shift matrix indication information includes a phase shift matrix PMI, and the receiving of the phase shift matrix indication information sent by the first network device includes: Receive a phase shift matrix PMI sent by the first network device.

22. The method according to claim 21, characterized in that The performing signal processing according to the phase shift matrix indication information includes: Determine a first phase shift matrix according to the phase shift matrix PMI; performing phase shift quantization processing on the first phase shift matrix to obtain a second phase shift matrix of a second network device; determining a phase shift matrix configuration according to the second phase shift matrix; Signal processing is performed on the transmission signal of the first network device based on the phase shift matrix configuration, wherein the signal processing includes signal reflection processing or signal transmission processing.

23. A precoding method, characterized in that: The method is executed by a terminal, and includes: Report the PMI of the second network device and beam quality information corresponding to the PMI to the first network device.

24. A first network device, characterized in that: include: a processing module, configured to determine phase shift matrix indication information of a second network device; A sending module is configured to send the phase shift matrix indication information to the second network device.

25. A second network device, characterized in that: include: A receiving module, configured to receive phase shift matrix indication information sent by the first network device; A processing module is configured to perform signal processing on a transmission signal of the first network device according to the phase shift matrix indication information.

26. A terminal, characterized in that: include: The sending module is used to report the PMI of the second network device and the beam quality information corresponding to the PMI to the first network device.

27. A communication device, wherein: include: transceiver; Memory; A processor is connected to the transceiver and the memory respectively, and is configured to control the wireless signal reception and transmission of the transceiver by executing computer-executable instructions on the memory, and can implement the method according to any one of claims 1 to 23.

28. A computer storage medium, wherein: The computer storage medium stores computer-executable instructions; after the computer-executable instructions are executed by the processor, the method according to any one of claims 1 to 23 can be implemented.

29. A communication system comprising a first network device, a second network device and a terminal, wherein: The first network device is configured to perform the method according to any one of claims 1 to 10; The second network device is configured to perform the method according to any one of claims 11 to 22; The terminal is configured to execute the method according to claim 23.

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