Codebook determination method, transmission control method, RIS device and base station

Abstract

The present application relates to the field of communication technology and provides a codebook determination method, a transmission control method, a RIS device, and a base station. The method includes: determining a first synchronization signal / physical broadcast channel block SSB beam; controlling an intelligent metasurface RIS device to reside in the first SSB beam, and configuring each set of electromagnetic control parameters of the RIS device in a patrol manner; receiving terminal measurement results of the first SSB beam under each set of electromagnetic control parameters, and determining the RIS codebook of the first SSB beam based on the terminal measurement results. The method, RIS device, and base station provided in the present application can adapt to scenarios with multiple SSB beams and multiple RIS deployments, and can dynamically change the RIS codebook following changes in the SSB beam, thereby ensuring the overall coverage performance of the SSB beam under large-scale RIS deployment.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a codebook determination method, a transmission control method, a RIS device, and a base station. Background Art

[0002] Reconfigurable Intelligent Surface (RIS) is a new communication technology with electromagnetic absorption, transmission, and scattering capabilities. Due to its low cost, low complexity, and ease of deployment, RIS is considered a key technology for addressing the challenges of future mobile communication networks.

[0003] Currently, the codebook design for transmissive RIS relies on preset incident and exit angles. In scenarios where large-scale RIS deployments are required, this codebook design cannot meet the requirements for overall RIS planning, nor can it adapt to the dynamic and variable beam changes in actual applications, which limits the large-scale deployment of RIS. Summary of the Invention

[0004] The embodiments of the present application provide a codebook determination method, a transmission control method, a RIS device, and a base station to solve the technical problem that the codebook design with preset incident angles and exit angles cannot meet the overall planning requirements of the RIS.

[0005] In a first aspect, an embodiment of the present application provides a codebook determination method, including:

[0006] Determining a first synchronization signal / physical broadcast channel block SSB beam;

[0007] Controlling the intelligent metasurface RIS device to reside in the first SSB beam and configuring various sets of electromagnetic control parameters of the RIS device in a patrol manner;

[0008] Receive terminal measurement results of the first SSB beam under the respective sets of electromagnetic control parameters, and determine a RIS codebook for the first SSB beam based on the terminal measurement results.

[0009] In one embodiment, determining the RIS codebook of the first SSB beam based on the terminal measurement result includes:

[0010] Determining target control parameters from the groups of electromagnetic control parameters based on the terminal measurement results;

[0011] Based on the target control parameters, determine the RIS codebook of the first SSB beam.

[0012] In one embodiment, determining the target control parameter from the groups of electromagnetic control parameters based on the terminal measurement result includes:

[0013] Based on the reference signal power RSRP in the terminal measurement result, an electromagnetic control parameter corresponding to the maximum value of RSRP is determined as the target control parameter.

[0014] In one embodiment, determining the RIS codebook of the first SSB beam based on the target control parameter includes:

[0015] Determining a target incident angle that matches a preset exit angle based on the incident angle and the exit angle corresponding to the target control parameter;

[0016] Based on the target incident angle and the preset exit angle, a RIS codebook for the first SSB beam is determined.

[0017] In one embodiment, determining the first synchronization signal / physical broadcast channel block SSB beam includes:

[0018] Detect the reference signal received power RSRP of each SSB beam sent by the base station, and determine the SSB beam corresponding to the maximum value of the RSRP as the first SSB beam.

[0019] In one embodiment, receiving the terminal measurement results of the first SSB beam under each set of electromagnetic control parameters includes:

[0020] Receive indication information sent by the base station, where the indication information is determined based on the terminal measurement results of the first SSB beam under the respective sets of electromagnetic control parameters.

[0021] In a second aspect, an embodiment of the present application provides a codebook determination method, including:

[0022] Determine a first synchronization signal / physical broadcast channel block SSB beam, where the first SSB beam is an SSB beam where the smart metasurface RIS device resides;

[0023] receiving a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters sent by the terminal, where each set of electromagnetic control parameters is configured by the RIS device in a patrol manner;

[0024] The terminal measurement result is sent to the RIS device, where the terminal measurement result is used to determine the RIS codebook of the first SSB beam.

[0025] In one embodiment, sending the terminal measurement result to the RIS device includes:

[0026] Generate indication information, where the indication information is determined based on a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters;

[0027] The instruction information is sent to the RIS device.

[0028] In a third aspect, an embodiment of the present application provides a transmission control method, including:

[0029] Determining a second synchronization signal / physical broadcast channel block SSB beam;

[0030] Determine the RIS codebook of the second SSB beam from the smart metasurface RIS codebook of each SSB beam, where the RIS codebook of each SSB beam is obtained based on the codebook determination method described in the first aspect or the second aspect;

[0031] The RIS device is configured based on a RIS codebook for the second SSB beam.

[0032] In one embodiment, determining the second synchronization signal / physical broadcast channel block SSB beam includes:

[0033] Detect the reference signal received power RSRP of each SSB beam sent by the base station, and determine the SSB beam corresponding to the maximum value of the RSRP as the second SSB beam.

[0034] In a fourth aspect, an embodiment of the present application provides a codebook determination device, including:

[0035] A beam determination unit, configured to determine a first synchronization signal / physical broadcast channel block SSB beam;

[0036] A patrol configuration unit, configured to control the intelligent metasurface RIS device to reside in the first SSB beam, and to patrol and configure various sets of electromagnetic control parameters of the RIS device;

[0037] A codebook determination unit is used to receive the terminal measurement results of the first SSB beam under the respective sets of electromagnetic control parameters, and determine the RIS codebook of the first SSB beam based on the terminal measurement results.

[0038] In a fifth aspect, an embodiment of the present application provides a codebook determination device, including:

[0039] A beam determination unit, configured to determine a first synchronization signal / physical broadcast channel block SSB beam, where the first SSB beam is an SSB beam where the smart metasurface RIS device resides;

[0040] a receiving unit, configured to receive a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters sent by a terminal, where each set of electromagnetic control parameters is configured by the RIS device in a patrol configuration;

[0041] A sending unit is configured to send the terminal measurement result to the RIS device, where the terminal measurement result is used to determine the RIS codebook of the first SSB beam.

[0042] In a sixth aspect, an embodiment of the present application provides a transmission control device, including:

[0043] A beam determination unit, configured to determine a second synchronization signal / physical broadcast channel block SSB beam;

[0044] A codebook acquisition unit, configured to determine a RIS codebook for the second SSB beam from the smart metasurface RIS codebook for each SSB beam, where the RIS codebook for each SSB beam is obtained based on the codebook determination method described in the first aspect or the second aspect;

[0045] A device control unit is configured to configure the RIS device based on the RIS codebook of the second SSB beam.

[0046] In a seventh aspect, an embodiment of the present application provides an intelligent metasurface RIS device, including a RIS body, a memory, a transceiver, and a processor;

[0047] The RIS body is used to perform electromagnetic control under the configuration of electromagnetic control parameters; the memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations:

[0048] Determining a first synchronization signal / physical broadcast channel block SSB beam;

[0049] Controlling the intelligent metasurface RIS device to reside in the first SSB beam and configuring various sets of electromagnetic control parameters of the RIS device in a patrol manner;

[0050] Receive terminal measurement results of the first SSB beam under the respective sets of electromagnetic control parameters, and determine a RIS codebook for the first SSB beam based on the terminal measurement results.

[0051] In an eighth aspect, an embodiment of the present application provides a super-intelligent surface RIS device, including a RIS body, a memory, a transceiver, and a processor;

[0052] The RIS body is used to perform electromagnetic control under the configuration of electromagnetic control parameters; the memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations:

[0053] Determining a second synchronization signal / physical broadcast channel block SSB beam;

[0054] Determine the RIS codebook of the second SSB beam from the smart metasurface RIS codebook of each SSB beam, where the RIS codebook of each SSB beam is obtained based on the codebook determination method described in the first aspect or the second aspect;

[0055] The RIS device is configured based on a RIS codebook for the second SSB beam.

[0056] Ninth, an embodiment of the present application provides a base station, including a memory, a transceiver, and a processor;

[0057] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0058] Determine a first synchronization signal / physical broadcast channel block SSB beam, where the first SSB beam is an SSB beam where the smart metasurface RIS device resides;

[0059] receiving a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters sent by the terminal, where each set of electromagnetic control parameters is configured by the RIS device in a patrol manner;

[0060] The terminal measurement result is sent to the RIS device, where the terminal measurement result is used to determine the RIS codebook of the first SSB beam.

[0061] In a tenth aspect, an embodiment of the present application provides a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of the codebook determination method described in the first aspect or the second aspect, or implements the steps of the transmission control method described in the third aspect.

[0062] The codebook determination method, transmission control method, RIS device and base station provided in the embodiments of the present application patrol and configure electromagnetic control parameters under the first SSB beam to obtain terminal measurement results of the first SSB beam under various electromagnetic control parameters, and determine the RIS codebook of the first SSB beam based on this, so that the RIS codebook determined in this way corresponds one-to-one to the SSB beam, can adapt to scenarios of multiple SSB beams and multiple RIS deployments, and can realize dynamic changes of the RIS codebook following changes in the SSB beam, thereby ensuring the overall coverage performance of the SSB beam under large-scale RIS deployment. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0064] Figure 1 It is a schematic diagram of the NCR architecture in the related art;

[0065] Figure 2 This is one of the flow charts of the codebook determination method provided in the embodiment of the present application;

[0066] Figure 3 This is a schematic diagram of the RIS architecture provided in an embodiment of the present application;

[0067] Figure 4 1 is a flowchart of the steps for determining the RIS codebook for the first SSB beam provided in an embodiment of the present application;

[0068] Figure 5 Schematic diagram of the incident beam cone design of the transmission-type RIS provided in an embodiment of the present application;

[0069] Figure 6 This is the second flow chart of the codebook determination method provided in the embodiment of the present application;

[0070] Figure 7 This is the third flow chart of the codebook determination method provided in the embodiment of the present application;

[0071] Figure 8 Schematic diagram of the flow of the transmission control method provided in the embodiment of the present application;

[0072] Figure 9 This is one of the structural diagrams of the codebook determination device provided in an embodiment of the present application;

[0073] Figure 10 This is the second structural diagram of the codebook determination device provided in an embodiment of the present application;

[0074] Figure 11 is a structural diagram of a transmission control device provided in an embodiment of the present application;

[0075] Figure 12 Schematic diagram of the structure of the RIS device provided in the embodiment of the present application;

[0076] Figure 13 It is a structural diagram of the base station provided in an embodiment of the present application. DETAILED DESCRIPTION

[0077] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0078] RIS consists of a large array of electromagnetic units. By applying control signals to the adjustable elements within these units, their electromagnetic properties can be dynamically controlled. This allows for programmable, intelligent manipulation of electromagnetic waves in space, creating an electromagnetic field with controllable amplitude, phase, polarization, and frequency. RIS transforms the wireless propagation environment from passive adaptation to active control, thereby creating an intelligent wireless environment.

[0079] In addition, as a two-dimensional implementation of metamaterials, RIS naturally has the characteristics of low cost, low complexity and easy deployment, and is regarded as an important technology to address the needs and challenges facing the development of future mobile communication networks.

[0080] Unlike traditional repeaters that transmit signals omnidirectionally and constantly amplify and forward signals, the Network Controlled Repeater (NCR) proposed in 3GPP Rel-18 can amplify and forward signals directionally only when needed, as instructed by the base station. This focuses on application scenarios that enhance coverage in high-frequency bands while also taking into account mid- and low-frequency coverage.

[0081] Figure 1 It is a schematic diagram of the NCR architecture in the related art, such as Figure 1 As shown, the NCR architecture includes two functional entities, namely the control module and the forwarding module. Among them, the control module is a functional entity used for information exchange between the NCR and the base station, and the forwarding module is a functional entity used for information forwarding between the NCR and the terminal, and between the NCR and the base station. The communication system based on the NCR architecture includes three communication links, namely the access link (Access Link, A-link), the backhaul link (Backhaul Link, B-link) and the control link (Control Link, C-link). The NCR exchanges control information with the base station through the C-link, and the control module needs to decode the information of the C-link link; the data of the A-link and B-link are transparent to the NCR and no decoding is performed.

[0082] NCR and beamforming-based RIS differ in system parameters, operating modes, control signaling, and other details, as follows:

[0083] First, RIS has far more components than NCR's active components. This means its beams are narrower and more directional than NCR's. Given a fixed coverage area, this inevitably requires a significant amount of additional beam resources. Low-overhead beam training and scanning is one of the incremental research areas of RIS compared to NCR.

[0084] Secondly, the current NCR control link and backhaul link are in-band links, sharing the same RF module. Due to the passive nature of RIS, it is possible to consider using independent RF between RIS control and signal reflection. This can provide more design flexibility, simplify the control link, and optimize RIS performance.

[0085] Thirdly, NCR requires power amplification, which places certain demands on power supply and energy consumption; while RIS only needs to power the control module, and can achieve significant energy saving through control scheme design.

[0086] Finally, the RF unit of NCR can be turned off to stop forwarding, while RIS can perform mirror reflection when there is no phase loading, so different switching strategies can be further designed.

[0087] It can be seen that RIS and NCR each have their own characteristics in the field of wireless communications. In response to the development needs of future mobile communication networks, the two can complement each other and jointly promote technological progress.

[0088] Currently, New Radio (NR) systems utilize beamforming technology to optimize coverage for various channels and signals. This technology forms narrow beams with concentrated energy and strong directionality, significantly improving channel and signal coverage and user experience. In NR systems, the base station (gNodeB) manages beams for various channels and signals and selects the optimal beam for each user, thereby improving coverage and user experience for each channel and signal.

[0089] In the NR system, the synchronization signal / physical broadcast channel block (Synchronization Signal and PBCHBlock, SSB) beam is also called the broadcast beam. The SSB beam is a typical static beam that is shared by the synchronization signal (Synchronization Signal, SS) and the physical broadcast channel (Physical Broadcast Channel, PBCH).

[0090] An SSB beam is a cell-level beam. The base station can periodically transmit SSB beams according to the SSB beam period (e.g., MS5, MS10, MS20, MS40, MS80, MS160, in milliseconds) to broadcast synchronization messages and system messages. Existing NR cells typically use multiple SSB beams, transmitting one SSB beam in each direction at a time in the time domain. SSB beams in different directions are transmitted at different times to provide coverage for the entire cell.

[0091] In existing networks, high-rise buildings suffer from significant penetration loss due to glass curtain walls and other design features. Without an indoor distribution system, terminals within these buildings may experience low RSRP (Reference Signal Receiving Power) levels and poor signal quality. RIS's low cost, low complexity, and ease of deployment make it feasible for large-scale deployment in these environments requiring enhanced coverage.

[0092] However, in practical applications, the codebook design for a transmissive RIS typically pre-determines the incident and exit angles. This determines the codebook for the RIS transmission, and in turn, the electromagnetic parameters of the RIS surface to implement the output beamforming scheme. This codebook design fails to meet the requirements for comprehensive RIS planning in scenarios where large-scale RIS deployment is required, nor does it adapt to the wireless network environment in which the RIS resides, directly limiting its large-scale deployment and application.

[0093] Furthermore, in environments requiring enhanced coverage, transmissive RIS equipment is likely to be deployed on a large scale on the glass curtain walls of high-rise buildings. From the perspective of network control of the RIS, it is difficult to determine the strongest SSB beam and the direction of arrival of the SSB beam at each deployment location. Consequently, it is impossible to determine the angle of incidence according to the generalized Snell's law for electromagnetic control, making it impossible to fully plan the RIS.

[0094] To address the above problems, an embodiment of the present application provides a codebook determination method. Figure 2 This is one of the flow charts of the codebook determination method provided in the embodiment of the present application, such as Figure 2 As shown, the method can be applied to RIS devices to implement codebook design for RIS devices. The method includes:

[0095] Step 210: Determine a first synchronization signal / physical broadcast channel block SSB beam.

[0096] Here, the first SSB beam is the SSB beam transmitted by the base station detected by the RIS device. The first SSB beam can be any one of multiple SSB beams transmitted by the base station detected by the RIS device, or can be the SSB beam with the largest RSRP value among multiple SSB beams transmitted by the base station detected by the RIS device. This embodiment of the present application does not specifically limit this.

[0097] Furthermore, to enable the RIS device to detect the SSB beam transmitted by the base station, a control module can be provided for the RIS device based on the NCR architecture. Here, the control module of the RIS device can communicate with the base station and the RIS device. Specifically, the control module of the RIS device can utilize the wireless network provided by the base station and be configured with the same radio frequency module as the terminal. Thus, the RIS device can monitor the SSB beam transmitted by the base station and determine the first SSB beam.

[0098] Figure 3 This is a schematic diagram of the RIS architecture provided by the embodiment of the present application. Figure 3 As shown, the RIS device includes two functional entities, namely the RIS control module and the electromagnetic unit array. Among them, the RIS control module is a functional entity used for information exchange between the RIS device and the base station, and the electromagnetic unit array is a functional entity used for information forwarding between the RIS device and the terminal, and between the RIS device and the base station. The communication system based on the RIS architecture includes three communication links, namely the access link (Access Link, A-link), the backhaul link (Backhaul Link, B-link) and the control link (Control Link, C-link). The RIS device can exchange control information with the base station through the C-link, and the RIS control module needs to decode the information of the C-link link; the data of the A-link and B-link are transparent to the electromagnetic unit array in the RIS device without any decoding.

[0099] It is understandable that based on Figure 3 In the RIS control module of the illustrated architecture, the RIS device can monitor the SSB beam sent by the base station, thereby determining the first SSB beam.

[0100] Step 220: Control the intelligent metasurface RIS device to reside in the first SSB beam, and configure each set of electromagnetic control parameters of the RIS device in a patrol manner.

[0101] Specifically, after determining the first SSB beam, the RIS device can reside on the first SSB beam. Simultaneously, the RIS device can configure its electromagnetic control parameters in a round-robin fashion according to a pre-set RIS codebook. The pre-set RIS codebook can include multiple sets of fixed incident and exit angles, each of which corresponds to a set of electromagnetic control parameters. This means there are multiple pre-set sets of electromagnetic control parameters. For example, each set of electromagnetic control parameters can be presented in a list format, where each set of electromagnetic control parameters corresponds to a sequence number and a codebook number, such as a sequence number of 001 and a codebook number of Code1.

[0102] The electromagnetic control parameters of the RIS device are configured in a patrol manner. That is, a set of electromagnetic control parameters can be configured at regular intervals. Therefore, within a time period, each set of electromagnetic control parameters controls the electromagnetic unit array of the RIS device for a period of time, thereby controlling the refraction direction of the first SSB beam sent by the base station through the RIS device to achieve transmission control of the first SSB beam.

[0103] It is understandable that the electromagnetic control parameters configured here are used to control Figure 3 Transmission of the first SSB beam in the access link is shown.

[0104] Step 230: Receive terminal measurement results of the first SSB beam under the respective sets of electromagnetic control parameters, and determine a RIS codebook for the first SSB beam based on the terminal measurement results.

[0105] Specifically, during the process of configuring each set of electromagnetic control parameters for the RIS device, the terminal also measures the first SSB beam transparently transmitted through the RIS device under each set of electromagnetic control parameters and feeds the measurement results back to the base station. The terminal here refers to the end terminal accessed by the RIS device as a relay.

[0106] For ease of explanation, in this embodiment of the present application, the result of the terminal's measurement of the first SSB beam transparently transmitted through the RIS under each set of electromagnetic control parameters is recorded as the terminal measurement result. Here, the terminal measurement result may include the measurement results of the first SSB beam corresponding to each set of electromagnetic control parameters, or may include the serial number or identifier of the electromagnetic control parameter corresponding to the maximum value of the measurement results obtained based on the measurement results of the first SSB beam corresponding to each set of electromagnetic control parameters. This embodiment of the present application is not specifically limited to this.

[0107] The terminal can feed back the terminal measurement result to the base station, and then the base station sends the terminal measurement result to the RIS device. Thus, the RIS device receives the terminal measurement result. Here, the transmission of the terminal measurement result from the terminal to the base station can be based on Figure 3The access link and backhaul link shown are implemented, and the transmission of the terminal measurement results from the base station to the RIS device can be based on Figure 3 The control link implementation shown.

[0108] After receiving the terminal measurement results, the RIS device can determine the RIS codebook for the first SSB beam based on the terminal measurement results. Specifically, based on the terminal measurement results, the RIS codebook for the first SSB beam can be determined by selecting the electromagnetic control parameters with the best control effect from the electromagnetic control parameters.

[0109] It can be understood that after obtaining the RIS codebook of the first SSB beam, it is possible to return to execute step 210 to update the first SSB beam, thereby obtaining the RIS codebook of each SSB beam.

[0110] The RIS codebook thus determined corresponds one-to-one to the SSB beam. Different RIS codebooks can correspond to different SSB beams. Therefore, when RIS devices are deployed on a large scale, the RIS devices can select the corresponding codebook based on the SSB beams in the wireless network environment in which they are located, thereby enabling the RIS codebook to adapt to the wireless network environment in which the RIS devices are located.

[0111] The method provided in the embodiment of the present application configures electromagnetic control parameters in a patrol configuration under the first SSB beam to obtain terminal measurement results of the first SSB beam under various electromagnetic control parameters, and determines the RIS codebook of the first SSB beam based on this, so that the RIS codebook determined in this way corresponds one-to-one to the SSB beam, can adapt to scenarios of multiple SSB beams and multiple RIS deployments, and can realize dynamic changes of the RIS codebook following changes in the SSB beam, thereby ensuring the overall coverage performance of the SSB beam under large-scale RIS deployment.

[0112] Moreover, in the method provided in the embodiment of the present application, the RIS codebook of the first SSB beam is determined based on the terminal measurement results of the first SSB beam under each set of electromagnetic control parameters, thereby achieving rapid convergence of the electromagnetic control parameters.

[0113] Based on the above embodiments, Figure 4 1 is a flow chart of the steps for determining the RIS codebook of the first SSB beam provided in an embodiment of the present application, such as Figure 4 As shown, in step 230, determining the RIS codebook of the first SSB beam based on the terminal measurement result includes:

[0114] Step 231: determining a target control parameter from each set of electromagnetic control parameters based on the terminal measurement result;

[0115] Step 232: Determine a RIS codebook for the first SSB beam based on the target control parameters.

[0116] Specifically, after obtaining the terminal measurement results for the first SSB beam under each set of electromagnetic steering parameters, target steering parameters can be selected from each set of electromagnetic steering parameters based on the terminal measurement results. Here, the target steering parameters are a set of electromagnetic steering parameters configured for the RIS device when residing in the first SSB beam, and the target steering parameters are the electromagnetic steering parameters with the optimal terminal measurement results among the sets of electromagnetic steering parameters configured for the RIS device.

[0117] It can be understood that the terminal measurement results can reflect the effectiveness of the RIS device in enhancing the coverage of the first SSB beam under each set of electromagnetic control parameters. The electromagnetic control parameters with the best terminal measurement results are the electromagnetic control parameters that are most capable of adapting to the first SSB beam and can effectively enhance the coverage performance of the first SSB beam, which are the target control parameters in the embodiment of the present application.

[0118] After obtaining the target control parameters, the RIS codebook for the first SSB beam can be determined based on the target control parameters. During this process, the incident and exit angles corresponding to the RIS device can be converted based on the target control parameters, thereby designing the RIS codebook for the first SSB beam.

[0119] The method provided in the embodiment of the present application determines the RIS codebook of the first SSB beam based on the terminal measurement results of the first SSB beam under each set of electromagnetic control parameters, which can achieve rapid convergence of the electromagnetic control parameters, thereby ensuring the reliability of the RIS codebook determination while improving the efficiency of the RIS codebook determination.

[0120] Based on any of the above embodiments, in step 231, determining the target control parameter from the groups of electromagnetic control parameters based on the terminal measurement result includes:

[0121] Based on the reference signal power RSRP in the terminal measurement result, an electromagnetic control parameter corresponding to the maximum value of RSRP is determined as the target control parameter.

[0122] Specifically, the terminal's measurement of the first SSB beam may be specifically a measurement of the RSRP of the first SSB beam. Accordingly, the terminal measurement result received by the RIS device includes the RSRP value of the first SSB beam measured by the terminal under each set of electromagnetic control parameters.

[0123] After receiving the terminal's measurement results, the RIS device can obtain the maximum RSRP value from the RSRP values ​​measured by the terminal for the first SSB beam under each set of electromagnetic control parameters. It should be understood that the maximum RSRP value here refers to the RSRP value detected by the RIS device when the coverage performance enhancement effect of the first SSB beam is optimal. Therefore, the electromagnetic control parameter corresponding to the maximum RSRP value can be used as the target control parameter.

[0124] For example, the determination of the target control parameters can be expressed as the following formula:

[0125] Code i RSRP =Max(RSRP code )

[0126] Among them, Code i RSRP That is, the target control parameter, RSRP code That is, the terminal measurement result.

[0127] Based on any of the foregoing embodiments, in step 232, determining the RIS codebook for the first SSB beam based on the target control parameter includes:

[0128] Determining a target incident angle that matches a preset exit angle based on the incident angle and the exit angle corresponding to the target control parameter;

[0129] Based on the target incident angle and the preset exit angle, a RIS codebook for the first SSB beam is determined.

[0130] Specifically, after the target control parameters are determined, the incident angle and the exit angle corresponding to configuring the target control parameters to the RIS device can be calculated based on the target control parameters.

[0131] Furthermore, in order to make the first SSB beam after transmission through the RIS device cover as deep a distance as possible, it can be assumed that when the RIS device is accessed as a relay, the terminal is located in the normal direction of the RIS device, or at the smallest possible angle to the normal direction. Here, the angle between the terminal and the normal direction of the RIS device can be recorded as α j , α j That is, the preset emission angle. It is understandable that the preset emission angle can be a pre-set smaller angle value.

[0132] After obtaining the incident angle and exit angle corresponding to the target control parameters, as well as the preset exit angle determined to further expand the coverage distance of the first SSB beam transmitted through the RIS device, the incident angle and exit angle corresponding to the target control parameters can be combined to calculate the incident angle that matches the preset exit angle, which is recorded here as the target incident angle.

[0133] For example, Figure 5 : is a schematic diagram of the incident beam cone design of the transmission-type RIS provided in the embodiment of the present application, Figure 5 The dotted line in is the normal line of the RIS device, where α i is the angle of incidence, α j When the incident angle and the exit angle corresponding to the target control parameters are known, as well as the preset exit angle, the target incident angle α of the transmission RIS can be calculated by the generalized Snell's law. i The generalized Snell's law can accurately describe the physical properties of electromagnetic metasurfaces, which can be expressed as the following formula:

[0134]

[0135] Where n i and n t is the refractive index of the incident and exit interfaces, θ i and θ t are the angles of incidence and exit.

[0136] It is understandable that the RIS device is deployed in a multi-SSB beam scenario in three-dimensional space, with an incident angle α i It may come from any dimension of the horizontal or vertical plane. Since the transmissive RIS device is usually deployed on a glass curtain wall and kept perpendicular to the ground, the incident angle α is determined i , and also basically determined the direction of the first SSB beam monitored by the RIS equipment.

[0137] After the target incident angle that matches the preset exit angle is calculated, the target incident angle and the preset exit angle can be combined to construct a RIS beamforming codebook corresponding to the first SSB beam.

[0138] The method provided in the embodiment of the present application determines the target incident angle that matches the preset exit angle based on the incident angle and exit angle corresponding to the target control parameters, thereby determining the RIS codebook of the first SSB beam, ensuring the reliability and effectiveness of the RIS codebook determination.

[0139] Based on any of the foregoing embodiments, in step 210, determining the first synchronization signal / physical broadcast channel block SSB beam includes:

[0140] Detect the reference signal received power RSRP of each SSB beam sent by the base station, and determine the SSB beam corresponding to the maximum value of the RSRP as the first SSB beam.

[0141] Specifically, the first SSB beam can be achieved by the RIS device detecting the RSRP of multiple SSB beams transmitted by the base station. That is, relying on the network control relay NCR calculation, the RIS device can detect multiple SSB beams transmitted by the base station and obtain the RSRP value of each SSB beam. Thus, from the multiple SSB beams, the SSB beam with the largest RSRP value, that is, the strongest SSB beam detected by the RIS device, is selected as the first SSB beam for the codebook to be determined.

[0142] It is understandable that in a multi-SSB beam scenario, the SSB beam will adjust as the user's location changes, i.e., SSB beam optimization occurs. Therefore, the SSB beam with the maximum RSRP value detected by the RIS device at different times may change, i.e., the first SSB beam determined by the RIS device at different times may be different. Therefore, the RIS device can record the first SSB beam determined at different times, thereby forming a RIS incident beam resource list, and generate a RIS codebook for different first SSB beams determined at different times. The RIS incident beam resource list here can include multiple SSB beams.

[0143] Based on any of the foregoing embodiments, in step 230, receiving the terminal measurement results of the first SSB beam under each set of electromagnetic control parameters includes:

[0144] Receive indication information sent by the base station, where the indication information is determined based on the terminal measurement results of the first SSB beam under the respective sets of electromagnetic control parameters.

[0145] Specifically, the terminal measurement result can be obtained by the terminal and transmitted to the base station through the terminal. After receiving the terminal measurement result of the first SSB beam under each set of electromagnetic control parameters, the base station can generate indication information based on the result and send the indication information to the RIS device.

[0146] The indication information here may be information including the terminal measurement results of the first SSB beam under each set of electromagnetic control parameters. Thus, after receiving the indication information, the RIS device can decode and obtain the terminal measurement results of the first SSB beam under each set of electromagnetic control parameters; or, the indication information here may also include the serial number of the electromagnetic control parameter with the best terminal measurement result obtained after the base station compares the terminal measurement results of the first SSB beam under each set of electromagnetic control parameters, or the electromagnetic control parameter with the best terminal measurement result as the time period of the RIS configuration. Thus, after receiving the indication information, the RIS device can decode and obtain the target electromagnetic control parameter determined based on the terminal measurement result, and thereby determine the RIS codebook of the first SSB beam. This embodiment of the present application does not specifically limit this.

[0147] Based on any of the above embodiments, Figure 6 This is the second flow chart of the codebook determination method provided in the embodiment of the present application, such as Figure 6 As shown, the method can be applied to a base station, and the base station cooperates with a RIS device to implement codebook design for the RIS device. The method includes:

[0148] Step 610: Determine a first synchronization signal / physical broadcast channel block SSB beam, where the first SSB beam is the SSB beam where the smart metasurface RIS device resides.

[0149] Here, the first SSB beam is the SSB beam transmitted by the base station detected by the RIS device. The first SSB beam can be any one of multiple SSB beams transmitted by the base station detected by the RIS device, or can be the SSB beam with the largest RSRP value among multiple SSB beams transmitted by the base station detected by the RIS device. This embodiment of the present application does not specifically limit this.

[0150] Furthermore, to enable the RIS device to detect the SSB beam transmitted by the base station, a control module can be provided for the RIS device based on the NCR architecture. Here, the control module of the RIS device can communicate with the base station and the RIS device. Specifically, the control module of the RIS device can utilize the wireless network provided by the base station and be configured with the same radio frequency module as the terminal. Thus, the RIS device can monitor the SSB beam transmitted by the base station and determine the first SSB beam.

[0151] After determining the first SSB beam, the RIS device can reside and access the first SSB beam. Accordingly, the terminal can use the SSB beam where the RIS device resides as the first SSB beam.

[0152] Step 620: receiving terminal measurement results of the first SSB beam under each set of electromagnetic control parameters sent by the terminal, where each set of electromagnetic control parameters is configured by the RIS device in a patrol manner.

[0153] Specifically, after determining the first SSB beam and settling on it, the RIS device can perform a round-robin configuration of its electromagnetic control parameters according to a pre-set RIS codebook. The pre-set RIS codebook can include multiple sets of fixed incident and exit angles, each of which corresponds to a set of electromagnetic control parameters. This means there are multiple pre-set sets of electromagnetic control parameters.

[0154] The electromagnetic control parameters of the RIS device are configured in a patrol manner. That is, a set of electromagnetic control parameters can be configured at regular intervals. Therefore, within a time period, each set of electromagnetic control parameters controls the electromagnetic unit array of the RIS device for a period of time, thereby controlling the refraction direction of the first SSB beam sent by the base station through the RIS device to achieve transmission control of the first SSB beam.

[0155] It is understandable that the electromagnetic control parameters configured here are used to control Figure 3 Transmission of the first SSB beam in the access link is shown.

[0156] During the process of configuring each set of electromagnetic control parameters of the RIS device in a patrol configuration, the terminal side also measures the first SSB beam transparently transmitted through the RIS device under each set of electromagnetic control parameters, and feeds back the measurement results to the base station. In this way, the base station can receive the terminal measurement results of the first SSB beam sent by the terminal under each set of electromagnetic control parameters.

[0157] For ease of explanation, in this embodiment of the present application, the result of the terminal's measurement of the first SSB beam transparently transmitted through the RIS under each set of electromagnetic control parameters is recorded as the terminal measurement result. Here, the terminal measurement result may include the measurement results of the first SSB beam corresponding to each set of electromagnetic control parameters, or may include the serial number or identifier of the electromagnetic control parameter corresponding to the maximum value of the measurement results obtained based on the measurement results of the first SSB beam corresponding to each set of electromagnetic control parameters. This embodiment of the present application is not specifically limited to this.

[0158] Step 630: Send the terminal measurement result to the RIS device, where the terminal measurement result is used to determine the RIS codebook of the first SSB beam.

[0159] Specifically, after receiving the terminal measurement results sent by the terminal, the base station can send the terminal measurement results to the RIS device. Thus, the RIS device receives the terminal measurement results. After receiving the terminal measurement results, the RIS device can determine the RIS codebook for the first SSB beam based on the terminal measurement results. Specifically, based on the terminal measurement results, the RIS device can select the electromagnetic control parameters with the best control effect from among the electromagnetic control parameters, and determine the RIS codebook for the first SSB beam based on the selected electromagnetic control parameters.

[0160] It can be understood that after obtaining the RIS codebook of the first SSB beam, it is possible to return to execute step 610 to update the first SSB beam, thereby obtaining the RIS codebook of each SSB beam.

[0161] The RIS codebook thus determined corresponds one-to-one to the SSB beam. Different RIS codebooks can correspond to different SSB beams. Therefore, when RIS devices are deployed on a large scale, the RIS devices can select the corresponding codebook based on the SSB beams in the wireless network environment in which they are located, thereby enabling the RIS codebook to adapt to the wireless network environment in which the RIS devices are located.

[0162] The method provided in the embodiment of the present application configures electromagnetic control parameters in a patrol configuration under the first SSB beam to obtain terminal measurement results of the first SSB beam under various electromagnetic control parameters, and determines the RIS codebook of the first SSB beam based on this, so that the RIS codebook determined in this way corresponds one-to-one to the SSB beam, can adapt to scenarios of multiple SSB beams and multiple RIS deployments, and can realize dynamic changes of the RIS codebook following changes in the SSB beam, thereby ensuring the overall coverage performance of the SSB beam under large-scale RIS deployment.

[0163] Moreover, in the method provided in the embodiment of the present application, the RIS codebook of the first SSB beam is determined based on the terminal measurement results of the first SSB beam under each set of electromagnetic control parameters, thereby achieving rapid convergence of the electromagnetic control parameters.

[0164] Based on any of the above embodiments, in step 630, sending the terminal measurement result to the RIS device includes:

[0165] Generate indication information, where the indication information is determined based on a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters;

[0166] The instruction information is sent to the RIS device.

[0167] Specifically, after receiving the terminal measurement results of the first SSB beam under each set of electromagnetic control parameters, the base station can generate indication information based on the received results and send the indication information to the RIS device.

[0168] The indication information here may be information including the terminal measurement results of the first SSB beam under each set of electromagnetic control parameters. Thus, after receiving the indication information, the RIS device can decode and obtain the terminal measurement results of the first SSB beam under each set of electromagnetic control parameters; or, the indication information here may also include the serial number of the electromagnetic control parameter with the best terminal measurement result obtained after the base station compares the terminal measurement results of the first SSB beam under each set of electromagnetic control parameters, or the electromagnetic control parameter with the best terminal measurement result as the time period of the RIS configuration. Thus, after receiving the indication information, the RIS device can decode and obtain the target electromagnetic control parameter determined based on the terminal measurement result, and thereby determine the RIS codebook of the first SSB beam. This embodiment of the present application does not specifically limit this.

[0169] Based on any of the above embodiments, Figure 7 This is the third flow chart of the codebook determination method provided in the embodiment of the present application, such as Figure 7 As shown, the codebook determination method includes the following steps:

[0170] Step 710: The RIS device determines the first SSB beam:

[0171] In a multi-SSB beam scenario, relying on the network control relay NCR technology, a RIS control module can be set up inside the RIS device. The RIS control module is equivalent to a terminal that can monitor the SSB beams sent by the base station and detect the RSRP value of each SSB beam. It then selects the SSB beam with the largest RSRP value as the first SSB beam. Subsequently, the RIS device chooses to reside and access the first SSB beam.

[0172] In step 720, the RIS device performs patrol configuration of each set of electromagnetic control parameters, and the base station receives the terminal's feedback of the first SSB beam under each set of electromagnetic control parameters.

[0173] In a multi-SSB beam scenario with multiple RIS devices deployed, the RIS device cannot obtain the incident angle of the selected first SSB beam and therefore cannot use the preset electromagnetic steering parameters based on the incident angle. Therefore, the RIS device can configure each set of electromagnetic steering parameters in a round-robin manner according to a pre-set RIS codebook. During the configuration of each set of electromagnetic steering parameters, the terminal acts as the terminal connected to the RIS device, measures the first SSB beam, and feeds the terminal measurement results back to the base station.

[0174] Accordingly, the base station can collect terminal measurement results fed back by the terminal accessed by the RIS device as a relay and transmit the terminal measurement results to the RIS device. The RIS device can then determine the target control parameters based on the electromagnetic control parameters corresponding to the maximum RSRP value in the terminal measurement results.

[0175] Step 730: Determine the RIS codebook for the first SSB beam based on the preset exit angle and the incident angle and exit angle corresponding to the target control parameter:

[0176] After the target control parameters are determined, the incident angle and the exit angle corresponding to configuring the target control parameters to the RIS device can be calculated based on the target control parameters.

[0177] Therefore, when the incident angle and exit angle corresponding to the target control parameters are known, as well as the preset exit angle determined to further expand the coverage distance of the first SSB beam transmitted through the RIS device, the target incident angle matching the preset exit angle can be solved based on the generalized Snell's law.

[0178] After obtaining the target incident angle, the design method of the transmission-type RIS incident beam cone and the RIS beamforming codebook can be determined based on this, and the electromagnetic control parameters of the RIS device can be determined accordingly.

[0179] Step 740 , returning to step 710 to monitor and record the first SSB beams at different times, forming a RIS incident beam resource list, and generating RIS codebooks for different first SSB beams determined at different times.

[0180] In the method provided in the embodiment of the present application, the RIS control module of the RIS device accesses the base station wireless network to detect the SSB beam and obtains the terminal measurement results under each set of electromagnetic control parameters. As a result, the RIS control module can achieve rapid convergence of the electromagnetic control parameters and can adapt to scenarios with multiple SSB beams and multiple RIS deployments.

[0181] The method provided in the embodiments of the present application can be applied in a multi-SSB beam scenario, and in this scenario, indoor coverage performance enhancement can be achieved based on the transmissive RIS technology. In this process, relying on the network control relay (NCR) technology, the RIS control module of the RIS device can select the SSB beam with the strongest RSRP as the first SSB beam, and set each set of electromagnetic control parameters of the RIS device in a round-robin manner. The base station collects the RSRP level values ​​fed back by the terminal terminal accessed by the transmissive RIS as a relay. The base station selects the electromagnetic control parameters of the strongest terminal feedback RSRP level value to determine the RIS transmissive beamforming codebook, thereby improving the coverage performance of the RIS access terminal.

[0182] Based on any of the above embodiments, Figure 8 Schematic diagram of the flow of the transmission control method provided by the embodiment of the present application. Figure 8 As shown, the method can be applied to RIS equipment to implement transmission control for SSB beams. The method includes:

[0183] Step 810: Determine a second synchronization signal / physical broadcast channel block SSB beam.

[0184] Specifically, in the process of performing transmission control on the SSB beam based on the RIS device to enhance coverage performance, the RIS device may first determine the second SSB beam.

[0185] Here, the second SSB beam is the SSB beam that needs to be controlled based on the RIS device. The second SSB beam can be any one of the multiple SSB beams detected by the RIS device to be sent by the base station, or it can be the SSB beam with the largest RSRP value among the multiple SSB beams detected by the RIS device to be sent by the base station. This embodiment of the application does not specifically limit this.

[0186] Step 820: Determine the RIS codebook of the second SSB beam from the smart metasurface RIS codebook of each SSB beam, where the RIS codebook of each SSB beam is obtained based on the codebook determination method described in any of the above embodiments.

[0187] Specifically, after the second SSB beam is determined, the RIS codebook of the second SSB beam can be determined from the pre-designed RIS codebooks of the SSB beams.

[0188] It can be understood that the RIS codebook of each SSB beam here is based on the codebook determination method described in any of the above embodiments. When each SSB beam is the first SSB beam, the electromagnetic control parameters are configured in a patrol manner under the first SSB beam to obtain the terminal measurement results of the first SSB beam under each electromagnetic control parameter, and then determined based on the terminal measurement results.

[0189] Here, each SSB beam corresponds to its own RIS codebook, that is, each SSB beam has a corresponding RIS codebook. Therefore, after determining the second SSB beam, the RIS codebook corresponding to the second SSB can be obtained therefrom.

[0190] Step 830: Configure the RIS device based on the RIS codebook of the second SSB beam.

[0191] Specifically, after determining the RIS codebook corresponding to the second SSB beam, the RIS codebook of the second SSB beam can be used as the beamforming codebook of the RIS device, thereby configuring corresponding electromagnetic control parameters for the RIS device to achieve control of the electromagnetic unit array of the RIS device, and then control the refraction direction of the second SSB beam sent by the base station through the RIS device, thereby achieving transmission control of the second SSB beam.

[0192] The method provided in the embodiment of the present application determines the RIS codebook of the second SSB beam from the RIS codebooks of each SSB beam and configures it to the RIS device, thereby enabling the electromagnetically controlled beamforming of the RIS device to follow the changes in the SSB beam to achieve dynamic changes in the RIS codebook configuration, thereby ensuring the overall coverage performance of the RIS device access terminal after the SSB beam is adjusted.

[0193] Based on any of the foregoing embodiments, in step 810, determining the second synchronization signal / physical broadcast channel block SSB beam includes:

[0194] Detect the reference signal received power RSRP of each SSB beam sent by the base station, and determine the SSB beam corresponding to the maximum value of the RSRP as the second SSB beam.

[0195] Specifically, the second SSB beam can be implemented by the RIS device by detecting the RSRP of multiple SSB beams transmitted by the base station. That is, relying on the network control relay NCR calculation, the RIS device can detect multiple SSB beams transmitted by the base station and obtain the RSRP value of each SSB beam. Thus, from the multiple SSB beams, the SSB beam with the largest RSRP value, that is, the strongest SSB beam detected by the RIS device, is selected as the second SSB beam requiring transmission control.

[0196] The method provided in the embodiment of the present application selects the strongest SSB beam as the second SSB beam in a multi-SSB beam scenario, implements transmission control based on SSB beam changes, and helps to ensure overall coverage performance.

[0197] The following describes a codebook determination device provided in an embodiment of the present application. The codebook determination device described below and the codebook determination method described above can refer to each other.

[0198] Figure 9 This is one of the structural diagrams of the codebook determination device provided in the embodiment of the present application, such as Figure 9 As shown, the codebook determination device includes:

[0199] The beam determination unit 910 is configured to determine a first synchronization signal / physical broadcast channel block SSB beam;

[0200] A patrol configuration unit 920 is used to control the intelligent metasurface RIS device to reside in the first SSB beam and to patrol and configure various sets of electromagnetic control parameters of the RIS device;

[0201] The codebook determination unit 930 is used to receive the terminal measurement results of the first SSB beam under the respective sets of electromagnetic control parameters, and determine the RIS codebook of the first SSB beam based on the terminal measurement results.

[0202] The device provided in the embodiment of the present application patrols and configures electromagnetic control parameters under the first SSB beam to obtain terminal measurement results of the first SSB beam under various electromagnetic control parameters, and determines the RIS codebook of the first SSB beam based on this, so that the RIS codebook determined in this way corresponds one-to-one to the SSB beam, can adapt to scenarios of multiple SSB beams and multiple RIS deployments, and can realize dynamic changes of the RIS codebook following changes in the SSB beam, thereby ensuring the overall coverage performance of the SSB beam under large-scale RIS deployment.

[0203] Based on any of the foregoing embodiments, the codebook determining unit is specifically configured to:

[0204] Determining target control parameters from the groups of electromagnetic control parameters based on the terminal measurement results;

[0205] Based on the target control parameters, determine the RIS codebook of the first SSB beam.

[0206] Based on any of the foregoing embodiments, the codebook determining unit is specifically configured to:

[0207] Based on the reference signal power RSRP in the terminal measurement result, an electromagnetic control parameter corresponding to the maximum value of RSRP is determined as the target control parameter.

[0208] Based on any of the foregoing embodiments, the codebook determining unit is specifically configured to:

[0209] Determining a target incident angle that matches a preset exit angle based on the incident angle and the exit angle corresponding to the target control parameter;

[0210] Based on the target incident angle and the preset exit angle, a RIS codebook for the first SSB beam is determined.

[0211] Based on any of the foregoing embodiments, the beam determination unit is specifically configured to:

[0212] Detect the reference signal received power RSRP of each SSB beam sent by the base station, and determine the SSB beam corresponding to the maximum value of the RSRP as the first SSB beam.

[0213] Based on any of the foregoing embodiments, the codebook determining unit is specifically configured to:

[0214] Receive indication information sent by the base station, where the indication information is determined based on the terminal measurement results of the first SSB beam under the respective sets of electromagnetic control parameters.

[0215] Based on any of the above embodiments, Figure 10 This is the second structural diagram of the codebook determination device provided in the embodiment of the present application, such as Figure 10 As shown, the codebook determination device includes:

[0216] A beam determination unit 1010 is configured to determine a first synchronization signal / physical broadcast channel block (SSB) beam, where the first SSB beam is an SSB beam where the smart metasurface RIS device resides.

[0217] A receiving unit 1020 is configured to receive a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters sent by a terminal, where each set of electromagnetic control parameters is configured by the RIS device in a patrol configuration;

[0218] The sending unit 1030 is configured to send the terminal measurement result to the RIS device, where the terminal measurement result is used to determine the RIS codebook of the first SSB beam.

[0219] The device provided in the embodiment of the present application patrols and configures electromagnetic control parameters under the first SSB beam to obtain terminal measurement results of the first SSB beam under various electromagnetic control parameters, and determines the RIS codebook of the first SSB beam based on this, so that the RIS codebook determined in this way corresponds one-to-one to the SSB beam, can adapt to scenarios of multiple SSB beams and multiple RIS deployments, and can realize dynamic changes of the RIS codebook following changes in the SSB beam, thereby ensuring the overall coverage performance of the SSB beam under large-scale RIS deployment.

[0220] Based on any of the foregoing embodiments, the sending unit is specifically configured to:

[0221] Generate indication information, where the indication information is determined based on a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters;

[0222] The instruction information is sent to the RIS device.

[0223] The transmission control device provided in an embodiment of the present application is described below. The transmission control device described below and the transmission control method described above can refer to each other.

[0224] Figure 11 Schematic diagram of the structure of the transmission control device provided in the embodiment of the present application. Figure 11 As shown, the transmission control device includes:

[0225] The beam determination unit 1110 is configured to determine a second synchronization signal / physical broadcast channel block SSB beam;

[0226] A codebook acquisition unit 1120 is configured to determine a RIS codebook for the second SSB beam from the smart metasurface RIS codebook for each SSB beam, where the RIS codebook for each SSB beam is obtained based on a codebook determination method;

[0227] The device control unit 1130 is configured to configure the RIS device based on the RIS codebook of the second SSB beam.

[0228] The apparatus provided in the embodiment of the present application determines the RIS codebook of the second SSB beam from the RIS codebooks of each SSB beam and configures it to the RIS device, thereby enabling the electromagnetically controlled beamforming of the RIS device to follow the changes in the SSB beam, thereby realizing dynamic changes in the RIS codebook configuration, thereby ensuring the overall coverage performance of the RIS device access terminal after the SSB beam is adjusted.

[0229] Based on any of the foregoing embodiments, the beam determination unit is specifically configured to:

[0230] Detect the reference signal received power RSRP of each SSB beam sent by the base station, and determine the SSB beam corresponding to the maximum value of the RSRP as the second SSB beam.

[0231] The terminal involved in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user, a handheld device with wireless connection capabilities, or other processing devices connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be called a user equipment (UE).

[0232] The base station involved in the embodiments of the present application may include multiple cells providing services to terminals. Depending on the specific application scenario, a base station may also be called an access point, or may be a device in an access network that communicates with wireless terminal devices over the air interface through one or more sectors, or other names.

[0233] Figure 12 This is a schematic diagram of the structure of the RIS device provided in the embodiment of the present application. Figure 12 As shown, the embodiment of the present application provides a RIS device, including a RIS body 1240, a memory 1210, a transceiver 1220 and a processor 1230;

[0234] The RIS body 1240 is used to perform electromagnetic control under the configuration of electromagnetic control parameters; the memory 1210 is used to store computer programs; the transceiver 1220 is used to send and receive data under the control of the processor 1230; the processor 1230 is used to read the computer program in the memory 1210 and perform the following operations:

[0235] Determining a first synchronization signal / physical broadcast channel block SSB beam;

[0236] Controlling the intelligent metasurface RIS device to reside in the first SSB beam and configuring various sets of electromagnetic control parameters of the RIS device in a patrol manner;

[0237] Receive terminal measurement results of the first SSB beam under the respective sets of electromagnetic control parameters, and determine a RIS codebook for the first SSB beam based on the terminal measurement results.

[0238] Among them, Figure 12In the present disclosure, the bus architecture may include any number of interconnected buses and bridges, specifically linking various circuits such as one or more processors represented by processor 1230 and memory represented by memory 1210. The bus architecture may also link various other circuits such as peripherals, voltage regulators, and power management circuits, all of which are well known in the art and are not further described herein. The bus interface provides an interface. The transceiver 1220 may be a plurality of components, including a transmitter and a receiver, providing a means for communicating with various other devices over a transmission medium.

[0239] The processor 1230 is responsible for managing the bus architecture and general processing, and the memory 1210 can store data used by the processor 1230 when performing operations.

[0240] The processor 1230 is configured to execute any of the methods provided in the embodiments of the present application according to the obtained executable instructions by calling the computer program stored in the memory 1210. The processor and the memory may also be arranged physically separately.

[0241] The RIS body 1240 may specifically be an electromagnetic unit array.

[0242] Optionally, the determining, based on the terminal measurement result, a RIS codebook for the first SSB beam includes:

[0243] Determining target control parameters from the groups of electromagnetic control parameters based on the terminal measurement results;

[0244] Based on the target control parameters, determine the RIS codebook of the first SSB beam.

[0245] Optionally, determining a target control parameter from each group of electromagnetic control parameters based on the terminal measurement result includes:

[0246] Based on the reference signal power RSRP in the terminal measurement result, an electromagnetic control parameter corresponding to the maximum value of RSRP is determined as the target control parameter.

[0247] Optionally, determining a RIS codebook for the first SSB beam based on the target control parameter includes:

[0248] Determining a target incident angle that matches a preset exit angle based on the incident angle and the exit angle corresponding to the target control parameter;

[0249] Based on the target incident angle and the preset exit angle, a RIS codebook for the first SSB beam is determined.

[0250] Optionally, determining a first synchronization signal / physical broadcast channel block SSB beam includes:

[0251] Detect the reference signal received power RSRP of each SSB beam sent by the base station, and determine the SSB beam corresponding to the maximum value of the RSRP as the first SSB beam.

[0252] Optionally, the receiving a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters includes:

[0253] Receive indication information sent by the base station, where the indication information is determined based on the terminal measurement results of the first SSB beam under the respective sets of electromagnetic control parameters.

[0254] In addition, the processor 1230 is further configured to read the computer program in the memory 1210 and perform the following operations:

[0255] Determining a second synchronization signal / physical broadcast channel block SSB beam;

[0256] Determining a RIS codebook for the second SSB beam from the smart metasurface RIS codebook for each SSB beam, where the RIS codebook for each SSB beam is obtained based on a codebook determination method;

[0257] The RIS device is configured based on a RIS codebook for the second SSB beam.

[0258] Figure 13 This is a schematic diagram of the structure of the base station provided in the embodiment of the present application, with reference to Figure 13 , an embodiment of the present application further provides a base station, which may include: a memory 1310, a transceiver 1320 and a processor 1330;

[0259] The memory 1310 is used to store computer programs; the transceiver 1320 is used to send and receive data under the control of the processor 1330; the processor 1330 is used to read the computer program in the memory 1310 and perform the following operations:

[0260] Determine a first synchronization signal / physical broadcast channel block SSB beam, where the first SSB beam is an SSB beam where the smart metasurface RIS device resides;

[0261] receiving a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters sent by the terminal, where each set of electromagnetic control parameters is configured by the RIS device in a patrol manner;

[0262] The terminal measurement result is sent to the RIS device, where the terminal measurement result is used to determine the RIS codebook of the first SSB beam.

[0263] Among them, Figure 13In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 1330 and memory represented by memory 1310. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are all well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 1320 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. The processor 1330 is responsible for managing the bus architecture and general processing, and the memory 1310 may store data used by the processor 1330 when performing operations.

[0264] Optionally, the sending the terminal measurement result to the RIS device includes:

[0265] Generate indication information, where the indication information is determined based on a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters;

[0266] The instruction information is sent to the RIS device.

[0267] It should be noted that the RIS device and base station provided in the embodiments of the present application can implement all the method steps implemented in the above method embodiments and can achieve the same technical effects. The parts of this embodiment that are the same as those in the method embodiments and the beneficial effects thereof will not be described in detail here.

[0268] On the other hand, embodiments of the present application further provide a computer program product, comprising a computer program. The computer program may be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can perform the steps of the methods provided in the above embodiments, for example, including:

[0269] Determining a first synchronization signal / physical broadcast channel block SSB beam;

[0270] Controlling the intelligent metasurface RIS device to reside in the first SSB beam and configuring various sets of electromagnetic control parameters of the RIS device in a patrol manner;

[0271] receiving terminal measurement results of the first SSB beam under each set of electromagnetic control parameters, and determining a RIS codebook for the first SSB beam based on the terminal measurement results;

[0272] or

[0273] Determine a first synchronization signal / physical broadcast channel block SSB beam, where the first SSB beam is an SSB beam where the smart metasurface RIS device resides;

[0274] receiving a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters sent by the terminal, where each set of electromagnetic control parameters is configured by the RIS device in a patrol manner;

[0275] Sending the terminal measurement result to the RIS device, where the terminal measurement result is used to determine a RIS codebook for the first SSB beam;

[0276] or

[0277] Determining a second synchronization signal / physical broadcast channel block SSB beam;

[0278] Determining a RIS codebook for the second SSB beam from the smart metasurface RIS codebook for each SSB beam, where the RIS codebook for each SSB beam is obtained based on a codebook determination method;

[0279] The RIS device is configured based on a RIS codebook for the second SSB beam.

[0280] On the other hand, an embodiment of the present application further provides a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, wherein the computer program is configured to cause a processor to execute the steps of the methods provided in the above embodiments, for example, including:

[0281] Determining a first synchronization signal / physical broadcast channel block SSB beam;

[0282] Controlling the intelligent metasurface RIS device to reside in the first SSB beam and configuring various sets of electromagnetic control parameters of the RIS device in a patrol manner;

[0283] receiving terminal measurement results of the first SSB beam under each set of electromagnetic control parameters, and determining a RIS codebook for the first SSB beam based on the terminal measurement results;

[0284] or

[0285] Determine a first synchronization signal / physical broadcast channel block SSB beam, where the first SSB beam is an SSB beam where the smart metasurface RIS device resides;

[0286] receiving a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters sent by the terminal, where each set of electromagnetic control parameters is configured by the RIS device in a patrol manner;

[0287] Sending the terminal measurement result to the RIS device, where the terminal measurement result is used to determine a RIS codebook for the first SSB beam;

[0288] or

[0289] Determining a second synchronization signal / physical broadcast channel block SSB beam;

[0290] Determining a RIS codebook for the second SSB beam from the smart metasurface RIS codebook for each SSB beam, where the RIS codebook for each SSB beam is obtained based on a codebook determination method;

[0291] The RIS device is configured based on a RIS codebook for the second SSB beam.

[0292] The processor-readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO)), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NANDFLASH), solid-state drives (SSDs)), etc.

[0293] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0294] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0295] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A codebook determination method, applied to an intelligent metasurface RIS device, characterized in that: include: Determining a first synchronization signal / physical broadcast channel block SSB beam; controlling the RIS device to reside in the first SSB beam and configuring each set of electromagnetic control parameters of the RIS device in a round-robin manner according to a pre-set RIS codebook, wherein the pre-set RIS codebook includes multiple sets of fixed incident angles and exit angles, each set of fixed incident angles and exit angles corresponding to a set of electromagnetic control parameters; receiving terminal measurement results of the first SSB beam under the respective sets of electromagnetic control parameters sent by a base station, and determining a RIS codebook for the first SSB beam based on the terminal measurement results; The determining, based on the terminal measurement result, a RIS codebook for the first SSB beam includes: Determining a target control parameter from the groups of electromagnetic control parameters based on the terminal measurement results; wherein determining the target control parameter from the groups of electromagnetic control parameters based on the terminal measurement results includes: determining, based on a reference signal power (RSRP) in the terminal measurement results, an electromagnetic control parameter corresponding to a maximum RSRP value as the target control parameter; Based on the target control parameters, determine the RIS codebook of the first SSB beam.

2. The codebook determination method according to claim 1, wherein: The determining, based on the target control parameter, a RIS codebook for the first SSB beam includes: Determining a target incident angle that matches a preset exit angle based on the incident angle and the exit angle corresponding to the target control parameter; Based on the target incident angle and the preset exit angle, a RIS codebook for the first SSB beam is determined.

3. The codebook determination method according to any one of claims 1 to 2, characterized in that: The determining of the first synchronization signal / physical broadcast channel block SSB beam includes: Detect the reference signal received power RSRP of each SSB beam sent by the base station, and determine the SSB beam corresponding to the maximum value of the RSRP as the first SSB beam.

4. The codebook determination method according to any one of claims 1 to 2, characterized in that: The receiving terminal measurement results of the first SSB beam under each set of electromagnetic control parameters includes: Receive indication information sent by the base station, where the indication information is determined based on the terminal measurement results of the first SSB beam under the respective sets of electromagnetic control parameters.

5. A codebook determination method, applied to a base station, characterized in that: include: Determine a first synchronization signal / physical broadcast channel block SSB beam, where the first SSB beam is an SSB beam where the smart metasurface RIS device resides; receiving a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters sent by the terminal, where each set of electromagnetic control parameters is configured by the RIS device in a round-robin manner according to a preset RIS codebook, where the preset RIS codebook includes multiple sets of fixed incident angles and exit angles, each set of fixed incident angles and exit angles corresponding to a set of electromagnetic control parameters; Sending the terminal measurement result to the RIS device, where the terminal measurement result is used by the RIS device to determine a target control parameter from each set of electromagnetic control parameters, and determining a RIS codebook for the first SSB beam based on the target control parameter; The determining of the target control parameter from the groups of electromagnetic control parameters includes: determining, based on a reference signal power RSRP in the terminal measurement result, an electromagnetic control parameter corresponding to a maximum value of RSRP as the target control parameter.

6. The codebook determination method according to claim 5, characterized in that: The sending the terminal measurement result to the RIS device includes: Generate indication information, where the indication information is determined based on a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters; The instruction information is sent to the RIS device.

7. A transmission control method, applied to an intelligent metasurface RIS device, characterized in that: include: Determining a second synchronization signal / physical broadcast channel block SSB beam; Determine a RIS codebook for the second SSB beam from the smart metasurface RIS codebook for each SSB beam, where the RIS codebook for each SSB beam is obtained based on the codebook determination method according to any one of claims 1 to 4; The RIS device is configured based on a RIS codebook for the second SSB beam.

8. The transmission control method according to claim 7, characterized in that: The determining of the second synchronization signal / physical broadcast channel block SSB beam includes: Detect the reference signal received power RSRP of each SSB beam sent by the base station, and determine the SSB beam corresponding to the maximum value of the RSRP as the second SSB beam.

9. A codebook determination device, applied to an intelligent metasurface RIS device, characterized in that: include: A beam determination unit, configured to determine a first synchronization signal / physical broadcast channel block SSB beam; a patrol configuration unit, configured to cause the RIS device to reside in the first SSB beam and to perform patrol configuration of various sets of electromagnetic control parameters of the RIS device according to a preset RIS codebook, wherein the preset RIS codebook includes multiple sets of fixed incident angles and exit angles, each set of fixed incident angles and exit angles corresponding to a set of electromagnetic control parameters; a codebook determining unit, configured to receive a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters sent by a base station, and determine a RIS codebook for the first SSB beam based on the terminal measurement result; The determining, based on the terminal measurement result, a RIS codebook for the first SSB beam includes: Determining a target control parameter from the groups of electromagnetic control parameters based on the terminal measurement results; wherein determining the target control parameter from the groups of electromagnetic control parameters based on the terminal measurement results includes: determining, based on a reference signal power (RSRP) in the terminal measurement results, an electromagnetic control parameter corresponding to a maximum RSRP value as the target control parameter; Based on the target control parameters, determine the RIS codebook of the first SSB beam.

10. A codebook determination device, applied to a base station, characterized in that: include: A beam determination unit, configured to determine a first synchronization signal / physical broadcast channel block SSB beam, where the first SSB beam is an SSB beam where the smart metasurface RIS device resides; a receiving unit, configured to receive terminal measurement results of the first SSB beam under each set of electromagnetic control parameters sent by a terminal, where each set of electromagnetic control parameters is configured by the RIS device in a round-robin manner according to a preset RIS codebook, where the preset RIS codebook includes multiple sets of fixed incident angles and exit angles, each set of fixed incident angles and exit angles corresponding to a set of electromagnetic control parameters; a sending unit, configured to send the terminal measurement result to the RIS device, where the terminal measurement result is used by the RIS device to determine a target control parameter from the groups of electromagnetic control parameters, and determine a RIS codebook for the first SSB beam based on the target control parameter; The determining of the target control parameter from the groups of electromagnetic control parameters includes: determining, based on a reference signal power RSRP in the terminal measurement result, an electromagnetic control parameter corresponding to a maximum value of RSRP as the target control parameter.

11. A transmission control device, applied to an intelligent metasurface RIS device, characterized in that: include: A beam determination unit, configured to determine a second synchronization signal / physical broadcast channel block SSB beam; A codebook acquisition unit, configured to determine a RIS codebook for the second SSB beam from the smart metasurface RIS codebook for each SSB beam, where the RIS codebook for each SSB beam is obtained based on the codebook determination method according to any one of claims 1 to 4; A device control unit is configured to configure the RIS device based on the RIS codebook of the second SSB beam.

12. An intelligent metasurface RIS device, characterized in that: Including RIS body, memory, transceiver, processor; RIS body, used for performing electromagnetic control under electromagnetic control parameter configuration; memory, used for storing computer programs; a transceiver, configured to transmit and receive data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: Determining a first synchronization signal / physical broadcast channel block SSB beam; controlling the RIS device to reside in the first SSB beam and configuring each set of electromagnetic control parameters of the RIS device in a round-robin manner according to a pre-set RIS codebook, wherein the pre-set RIS codebook includes multiple sets of fixed incident angles and exit angles, each set of fixed incident angles and exit angles corresponding to a set of electromagnetic control parameters; receiving terminal measurement results of the first SSB beam under the respective sets of electromagnetic control parameters sent by a base station, and determining a RIS codebook for the first SSB beam based on the terminal measurement results; The determining, based on the terminal measurement result, a RIS codebook for the first SSB beam includes: Determining a target control parameter from the groups of electromagnetic control parameters based on the terminal measurement results; wherein determining the target control parameter from the groups of electromagnetic control parameters based on the terminal measurement results includes: determining, based on a reference signal power (RSRP) in the terminal measurement results, an electromagnetic control parameter corresponding to a maximum RSRP value as the target control parameter; Based on the target control parameters, determine the RIS codebook of the first SSB beam.

13. A super intelligent surface RIS device, characterized in that: Including RIS body, memory, transceiver, processor; RIS body, used for performing electromagnetic control under electromagnetic control parameter configuration; memory, used for storing computer programs; a transceiver, configured to transmit and receive data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: Determining a second synchronization signal / physical broadcast channel block SSB beam; Determine a RIS codebook for the second SSB beam from the smart metasurface RIS codebook for each SSB beam, where the RIS codebook for each SSB beam is obtained based on the codebook determination method according to any one of claims 1 to 4; The RIS device is configured based on a RIS codebook for the second SSB beam.

14. A base station, characterized in that: Including memory, transceiver, processor; a memory for storing computer programs; a transceiver for transmitting and receiving data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: Determine a first synchronization signal / physical broadcast channel block SSB beam, where the first SSB beam is an SSB beam where the smart metasurface RIS device resides; receiving a terminal measurement result of the first SSB beam under each set of electromagnetic control parameters sent by the terminal, where each set of electromagnetic control parameters is configured by the RIS device in a round-robin manner according to a preset RIS codebook, where the preset RIS codebook includes multiple sets of fixed incident angles and exit angles, each set of fixed incident angles and exit angles corresponding to a set of electromagnetic control parameters; Sending the terminal measurement result to the RIS device, where the terminal measurement result is used by the RIS device to determine a target control parameter from each set of electromagnetic control parameters, and determining a RIS codebook for the first SSB beam based on the target control parameter; The determining of the target control parameter from the groups of electromagnetic control parameters includes: determining, based on a reference signal power RSRP in the terminal measurement result, an electromagnetic control parameter corresponding to a maximum value of RSRP as the target control parameter.

15. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the codebook determination method according to any one of claims 1 to 6 are implemented, or the steps of the transmission control method according to any one of claims 7 to 8 are implemented.

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