RIS control method, device, network device, storage medium and program product

Abstract

The present disclosure provides a RIS control method, apparatus, network device, storage medium and program product, which relate to the field of wireless communication technology. The RIS control method includes: in response to a received SSB beam forwarded by a first network device, sending feedback information to a second network device, so that the second network device generates corresponding configuration information based on the feedback information, and sending the configuration information to the first network device, so that the first network device periodically switches the SSB beam based on the configuration information, and the first network device includes multiple RIS elements. Through the technical solution of the present disclosure, since RIS performs targeted beam adjustment based on actual terminal feedback, it can reduce unnecessary beam scanning actions and realize the optimal allocation of beam resources in dynamic user distribution scenarios, while improving the system coverage performance, taking into account the requirements of high throughput, low latency and high energy efficiency.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communication technology, and in particular to an intelligent metasurface RIS control method, an intelligent metasurface RIS control device, a terminal, a network device, a computer-readable storage medium, and a computer program product. Background Art

[0002] In the NR (New Radio) system, base stations periodically send SSB (Synchronization Signal Block) broadcast system information using specific beams for UEs to access the network. The Reconfigurable Intelligent Surface (RIS) can cover obstructed areas by dynamically controlling the electromagnetic wave propagation environment. The base station needs to configure beam information to the RIS in advance to control its beam switching. However, in pursuit of high coverage performance, a large number of beam scans need to be maintained, resulting in high hardware energy consumption. If the number of beams is excessively reduced, user service quality will be sacrificed. Especially in scenarios with dynamic user distribution, it is difficult to achieve optimal allocation of beam resources and it is impossible to simultaneously meet the requirements of high throughput, low latency and high energy efficiency.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0004] The purpose of the present disclosure is to provide an intelligent metasurface RIS control method, control device, terminal, network device, storage medium and computer program product, which, at least to some extent, overcome the problem in related technologies that beam resources cannot simultaneously meet the requirements of high throughput, low latency and high energy efficiency.

[0005] Other features and advantages of the present disclosure will become apparent from the following detailed description, or may be learned in part by practice of the present disclosure.

[0006] According to one aspect of the present disclosure, a smart metasurface RIS control method is provided, which is applied to a terminal, including: in response to a received SSB beam forwarded by a first network device RIS, feedback information is sent to a second network device, wherein the first network device RIS includes multiple RIS elements, so that the second network device generates corresponding configuration information based on the feedback information, and sends the configuration information to the first network device RIS, so that the first network device RIS periodically switches the SSB beam based on the configuration information.

[0007] In one embodiment of the present disclosure, the feedback information includes reference signal received power RSRP.

[0008] According to another aspect of the present disclosure, a smart metasurface RIS control method is provided, which is applied to a first network device RIS, wherein the first network device RIS includes multiple RIS elements, including: forwarding an SSB beam directed from a second network device to the first network device RIS based on a codebook level carried by initial control information, wherein after each forwarding of the SSB beam to a terminal within a service range, the second network device determines corresponding configuration information based on feedback information from the terminal, and sends it to the first network device RIS; and periodically switching the forwarded SSB beam based on the received configuration information.

[0009] In one embodiment of the present disclosure, the codebook level represents the number of forwarding SSB beams supported by the first network device RIS and the spatial direction of each forwarding SSB beam; the initial control information also includes a weight value corresponding to each RIS element, the weight value represents the weight of each RIS element in the first network device RIS, and the weight represents the amplitude and / or phase of each SSB beam forwarded by the RIS element, wherein the number of the forwarding SSB beams is determined based on the codebook level, and the spatial direction of each forwarding SSB beam is determined based on the codebook level, the amplitude and / or the phase.

[0010] In one embodiment of the present disclosure, forwarding the SSB beam directed from the second network device to the first network device RIS includes: periodically and sequentially forwarding the SSB beam to the terminal based on a time division multiplexing mechanism.

[0011] In one embodiment of the present disclosure, the codebook level includes N+1 configurable levels, where N is a positive integer, and the forwarded SSB beam is periodically switched based on the received configuration information, including: in the periodic switching, if first configuration information is received, the codebook level is increased based on the first configuration information, and the number of corresponding forwarded SSB beams is reduced based on a specified method.

[0012] In one embodiment of the present disclosure, the codebook level includes N+1 configurable levels, where N is a positive integer, and the forwarded SSB beam is periodically switched based on the received configuration information, including: in the periodic switching, if second configuration information is received, the codebook level is reduced based on the second configuration information, the number of corresponding forwarded SSB beams is increased based on a specified method, and the switching is stopped after the increase to maintain the increased number of SSB beams.

[0013] In one embodiment of the present disclosure, it also includes: if second configuration information is received in the next switching cycle, the second configuration information has the same codebook level as the previous switching cycle, and the number of forwarded SSB beams remains unchanged.

[0014] In one embodiment of the present disclosure, the initial control information is indicated or predefined by the second network device; the configuration information is indicated or predefined by the second network device; and the designation method is a method predefined by the second network device or a method indicated by the second network device.

[0015] In one embodiment of the present disclosure, the SSB beam of the second network device pointing to the first network device RIS is forwarded based on the codebook level carried by the initial control information, including: the initial control information carries a minimum codebook level, and the corresponding maximum number of forwarding the SSB beam is determined based on the minimum codebook level, so as to forward the SSB beam based on the maximum number.

[0016] According to another aspect of the present disclosure, a smart metasurface RIS control method is provided, which is applied to a second network device, including: receiving feedback information sent by a terminal served by a first network device RIS, wherein the feedback information is generated based on an SSB beam forwarded by the first network device RIS; generating corresponding configuration information based on the feedback information; and sending the configuration information to the first network device RIS, so that the first network device RIS periodically switches the SSB beam based on the configuration information.

[0017] In one embodiment of the present disclosure, generating corresponding configuration information based on the feedback information includes: determining the number of terminals within the RIS service range and the RSRPs of the terminals within the RIS service range based on the feedback information; and generating the corresponding configuration information based on the number of terminals and the RSRPs of the terminals.

[0018] In one embodiment of the present disclosure, the corresponding configuration information is generated based on the number of terminals and the RSRP of the terminals, including: detecting whether the number of terminals and the RSRP of the terminals meet a first condition; if the first condition is met, generating first configuration information; if the first condition is not met, generating second configuration information, wherein the first configuration information is suitable for enabling the first network device RIS to continue to periodically switch the SSB beam, and the second configuration information is suitable for enabling the first network device RIS to stop periodically switching the SSB beam.

[0019] In one embodiment of the present disclosure, if the second condition is met, it is determined that the first condition is met.

[0020] In one embodiment of the present disclosure, if the second condition and the third condition are satisfied at the same time, it is determined that the first condition is satisfied.

[0021] In one embodiment of the present disclosure, the first configuration information includes: a codebook level negatively correlated with the SSB beam is increased based on a first variable so that the number of forwarded SSB beams of the first network device RIS is reduced based on a specified method, wherein the first variable is a positive integer, the codebook level includes N+1 configurable levels, the sum of the codebook level and the first variable before the increase is less than or equal to the maximum codebook level, and if the codebook level increases to the maximum codebook level N, the increase of the codebook level is stopped.

[0022] In one embodiment of the present disclosure, the second configuration information includes: the codebook level negatively correlated with the SSB beam is reduced based on a second variable, so that the number of forwarded SSB beams of the first network device RIS is increased based on a specified method, and the first network device RIS maintains the increased number of SSB beams, wherein the second variable is a positive integer, the second variable is less than the value of the current codebook level of the first network device RIS, or the second variable is less than the value of the current beam level of the first network device RIS, wherein the value of the current codebook level is less than or equal to the maximum codebook level N; or the codebook level remains unchanged, wherein the value of the current codebook level is less than the maximum codebook level N.

[0023] In one embodiment of the present disclosure, the second condition includes any one of multiple second sub-conditions, and the multiple second sub-conditions include: the difference between the RSRP of all the terminals served by the RIS and the first threshold is greater than or equal to the second threshold; the difference between the RSRP of at least one of the terminals served by the RIS and the first threshold is greater than or equal to the second threshold; the difference between the RSRP of at least M terminals served by the RIS and the first threshold is greater than or equal to the second threshold, where M is a positive integer.

[0024] In one embodiment of the present disclosure, M is a first parameter preset by the second network device, and the first parameter is determined based on the total number of the terminals served by the RIS and a preset percentage value; or M is determined based on the total number of the terminals served by the RIS and any one of the preset percentage sets; or M is a second parameter preset by the second network device, and the second parameter is determined based on the total number of the terminals served by the second network device and the preset percentage value; or M is determined based on the total number of the terminals served by the second network device and any one of the preset percentage sets.

[0025] In one embodiment of the present disclosure, the first threshold is a threshold value predefined by the communication system; or the first threshold is a threshold value preconfigured by the second network device; or the first threshold is a threshold value indicated by the second network device; or the first threshold is a threshold value configured by the second network device, the first threshold is a fixed value, or the first threshold changes based on different instructions of the second network device.

[0026] In one embodiment of the present disclosure, the second threshold is a threshold value predefined by the communication system; or the second threshold is a threshold value preconfigured by the second network device; or the second threshold is a threshold value indicated by the second network device; or the second threshold is a threshold value configured by the second network device, the second threshold is a fixed value, or the second threshold changes based on different instructions of the second network device.

[0027] In one embodiment of the present disclosure, the third condition includes any one of multiple third sub-conditions, and the multiple third sub-conditions include: the difference between the RSRP of all the terminals served by the RIS and the first threshold is less than the third threshold; the difference between the RSRP of at least one of the terminals served by the RIS and the first threshold is less than the third threshold; the difference between the RSRP of at least Q terminals served by the RIS and the first threshold is less than the third threshold, where Q is a positive integer.

[0028] In one embodiment of the present disclosure, Q is a third parameter preset by the second network device, and the third parameter is determined based on the total number of terminals served by the RIS and a preset percentage value; or Q is determined based on the total number of terminals served by the RIS and any one of the preset percentage sets; or Q is a fourth parameter preset by the second network device, and the fourth parameter is determined based on the total number of terminals served by the second network device and the preset percentage value; or Q is determined based on the total number of terminals served by the second network device and any one of the preset percentage sets.

[0029] In one embodiment of the present disclosure, the third threshold is a threshold value predefined by the communication system; or the third threshold is a threshold value preconfigured by the second network device; or the third threshold is a threshold value indicated by the second network device; or the third threshold is a threshold value configured by the second network device, the third threshold is a fixed value, or the third threshold changes based on different instructions of the second network device.

[0030] According to another aspect of the present disclosure, an intelligent metasurface RIS control device is provided, which is applied to a terminal and includes: a sending module for sending feedback information to a second network device in response to a received SSB beam forwarded by a first network device RIS, wherein the first network device RIS includes multiple RIS elements, so that the second network device generates corresponding configuration information based on the feedback information, and sends the configuration information to the first network device RIS, so that the first network device RIS periodically switches the SSB beam based on the configuration information.

[0031] According to another aspect of the present disclosure, an intelligent metasurface RIS control device is provided, which is applied to a first network device RIS, wherein the first network device RIS includes multiple RIS elements, including: a forwarding module, which is used to forward the SSB beam of the second network device pointing to the first network device RIS based on the codebook level carried by the initial control information, wherein after each forwarding of the SSB beam to a terminal within the service range, the second network device determines the corresponding configuration information based on the feedback information of the terminal, and sends it to the first network device RIS; a switching module, which is used to periodically switch the forwarded SSB beam based on the received configuration information.

[0032] According to another aspect of the present disclosure, an intelligent metasurface RIS control device is provided, which is applied to a second network device, including: a receiving module for receiving feedback information sent by a terminal served by a first network device RIS, wherein the feedback information is generated based on an SSB beam forwarded by the first network device RIS; a generating module for generating corresponding configuration information based on the feedback information; and a sending module for sending the configuration information to the first network device RIS, so that the first network device RIS periodically switches the SSB beam based on the configuration information.

[0033] According to another aspect of the present disclosure, a terminal is provided, comprising: a processor; and a memory for storing executable instructions of the processor; the processor is configured to execute the intelligent metasurface RIS control method of the first aspect by executing the executable instructions.

[0034] According to another aspect of the present disclosure, a network device is provided, comprising: a processor; and a memory for storing executable instructions of the processor; the processor is configured to execute the intelligent metasurface RIS control method of the first aspect by executing the executable instructions.

[0035] According to another aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned intelligent metasurface RIS control method is implemented.

[0036] According to another aspect of the present disclosure, a computer program product is provided, on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned intelligent metasurface RIS control method is implemented.

[0037] The intelligent metasurface RIS control solution provided by the embodiments of the present disclosure implements initial SSB beam forwarding by utilizing codebook levels, and dynamically generates configuration information in combination with terminal feedback information, thereby periodically switching the forwarding beam. On the one hand, RIS performs targeted beam adjustments based on actual terminal feedback, which can reduce unnecessary beam scanning actions, thereby helping to reduce the hardware energy consumption of the second network device. On the other hand, compared with the method of excessively reducing the number of beams and sacrificing user service quality, it flexibly adjusts beam resources based on real-time terminal feedback, achieving optimal allocation of beam resources in dynamic user distribution scenarios. While improving system coverage performance, it also takes into account the requirements of high throughput, low latency and high energy efficiency, thereby improving the overall performance of the communication system and user experience.

[0038] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0040] Figure 1 A schematic diagram showing an intelligent metasurface RIS control system according to an embodiment of the present disclosure is shown;

[0041] Figure 2 A flow chart showing a method for controlling an intelligent metasurface RIS according to an embodiment of the present disclosure is shown;

[0042] Figure 3 A flow chart showing another intelligent metasurface RIS control method according to an embodiment of the present disclosure is shown;

[0043] Figure 4 A schematic diagram showing a corresponding relationship between a codebook level and the number of beams in an embodiment of the present disclosure;

[0044] Figure 5 A flow chart of another intelligent metasurface RIS control method according to an embodiment of the present disclosure is shown;

[0045] Figure 6A schematic diagram showing another intelligent metasurface RIS control system according to an embodiment of the present disclosure is shown;

[0046] Figure 7 A flow chart of another intelligent metasurface RIS control method according to an embodiment of the present disclosure is shown;

[0047] Figure 8 A schematic diagram of an intelligent metasurface RIS control device according to an embodiment of the present disclosure is shown;

[0048] Figure 9 A schematic diagram of another intelligent metasurface RIS control device according to an embodiment of the present disclosure is shown;

[0049] Figure 10 A schematic diagram of another intelligent metasurface RIS control device according to an embodiment of the present disclosure is shown;

[0050] Figure 11 A structural block diagram of a computer device in an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0051] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0052] In addition, the accompanying drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. Identical reference numerals in the figures denote identical or similar parts, and thus repetitive descriptions thereof will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities that do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0053] As wireless communications evolve toward higher-frequency bands, such as millimeter-wave and terahertz networks, signal coverage and transmission quality face significant challenges. Reconfigurable Intelligent Surfaces (RIS), an emerging technology, are becoming a key means of enhancing network coverage and improving energy efficiency by dynamically controlling the electromagnetic wave propagation environment.

[0054] In actual RIS deployments, base stations are typically unable to independently obtain channel state information (CSI) for the BS-RIS link and the RIS-UE link. They can only estimate CSI by measuring the CSI of the concatenated channel (i.e., the entire BS-RIS-UE link). The complexity of this concatenated channel poses significant challenges in the joint optimization of base station-side precoding and RIS-side beamforming. Therefore, a viable solution is to control the RIS's forwarding beams using beam indices. However, the base station and RIS themselves do not know which forwarding beams the network currently requires, so their overall management relies on the Operations, Maintenance, and Management (OAM) system. Therefore, the physical characteristics of the beams used by the RIS to forward signals, such as beam direction and beamwidth, can be provided to the base station and RIS by OAM.

[0055] After the base station obtains the RIS beam information, it can establish an association relationship between the RIS beam and the SSB (synchronization signal block) / CSI-RS (channel state information reference signal) beam. To illustrate this mechanism, Figure 1 An example of mapping RIS beams to SSB beams is shown. In NR systems, base stations periodically broadcast SSBs using specific beams to help UEs access the network. The UE detects the SSBs and selects one. If successfully received, it transmits a preamble using the PRACH (Physical Random Access Channel) opportunity associated with the selected SSB index. Because the PRACH opportunity position and SSB index are fixed, the base station can infer the UE's selected beam by detecting the preamble on a specific PRACH opportunity.

[0056] like Figure 1 For example, an SSB burst contains eight SSBs. SSBs indexed #1 through #4 cover the near-end area, while SSBs indexed #5 through #8 all point to the RIS to cover the obscured area. SSBs are transmitted using time-division multiplexing, enabling a one-to-one mapping between SSB beams and RIS beams (e.g., {#5, #a}, {#6, #b}, etc.). The base station only needs to configure beam information with the RIS in advance to control beam switching.

[0057] However, if high coverage performance is pursued, a large number of beam scans need to be maintained, resulting in high hardware energy consumption. Although excessively reducing the number of beams can reduce power consumption, it may sacrifice user service quality. Especially in dynamic user distribution scenarios, if the optimal allocation of beam resources cannot be achieved, it will be impossible to simultaneously meet the requirements of high throughput, low latency and high energy efficiency.

[0058] To facilitate understanding, several terms involved in this application are first explained below.

[0059] RSRP (Reference Signal Received Power): refers to the linear average of the signal power received by a terminal device on a specific reference signal resource. In 5G NR systems, reference signals (RS) are known signals transmitted by base stations and used for various functions, such as channel estimation, synchronization, and power control. Terminal devices assess the current wireless channel quality and signal strength by measuring the received power of the reference signal.

[0060] The SSB beam consists of three parts: the primary synchronization signal (PSS), the secondary synchronization signal (SSS), and the physical broadcast channel (PBCH). It plays an important role in the 5G NR network, enabling the terminal (UE) to detect the physical cell ID and achieve downlink time and frequency domain synchronization.

[0061] The RIS beam is transmitted by a reconfigurable smart surface (RIS). RIS is composed of a large number of small, passive reflective elements that do not actively generate signals. Its operating principle is as follows: a signal (such as an SSB beam) emitted by a base station or other transmitter is incident on the RIS. Based on a pre-set algorithm and received control information, the RIS adjusts the electromagnetic properties of each reflective element, such as phase and amplitude, to reflect and manipulate the incident signal. This reflects the signal in a specific direction and with a specific gain, thus forming a RIS beam with specific physical properties (such as beam direction and beam width), thereby optimizing the signal propagation path.

[0062] Those skilled in the art will appreciate that the initial control information and configuration information in the following embodiments both fall within the scope of control information.

[0063] In the field of wireless communications, a codebook refers to a set of predefined vectors or matrices that can be used for quantized representation of beamforming vectors, etc.

[0064] Below, each step of the intelligent metasurface RIS control method in this example implementation will be described in more detail with reference to the accompanying drawings and examples.

[0065] Among them, in the specific implementation of the present disclosure, the first network device, the RIS, and the first network device RIS all represent smart metasurfaces for wireless communication enhancement, and the only difference between them is the different ways of expression.

[0066] Figure 2 A flow chart of a smart metasurface RIS control method in an embodiment of the present disclosure is shown.

[0067] like Figure 2 As shown, the intelligent metasurface RIS control method according to one embodiment of the present disclosure is applied to a terminal, including:

[0068] Step S202: In response to the received SSB beam forwarded by the first network device, it is determined that the service is provided by the RIS, and feedback information is sent to the second network device. The first network device includes multiple RIS elements, so that the second network device generates corresponding configuration information based on the feedback information, and sends the configuration information to the first network device, so that the first network device periodically switches the SSB beam based on the configuration information.

[0069] In some embodiments, the first network device is a RIS and the second network device is a base station. In scenarios involving the RIS, the beam transmitted by the base station first reaches the RIS. The RIS reflects and adjusts the beam according to the configuration to form a RIS beam, which is then directed to the target area or UE. In this case, it can be regarded as the base station indirectly performing beam scanning-related operations on the target area or UE through the RIS.

[0070] In this embodiment, when the terminal receives the SSB beam forwarded by the first network device, namely the RIS, the terminal can recognize that it is served by the RIS and send feedback information to the second network device. Based on the feedback information, the second network device can understand the environment and signal reception status of the terminal, and then generate corresponding configuration information and send it to the first network device. The first network device periodically switches the SSB beam according to the configuration information. Through terminal feedback and intelligent regulation of the second network device, the beam switching is performed according to actual needs, preventing a large number of non-targeted beam scanning, effectively reducing hardware energy consumption, and realizing reasonable allocation of beam resources in dynamic user distribution scenarios, thereby optimizing the requirements of high throughput, low latency and high energy efficiency, and improving the comprehensive performance of the communication system in complex scenarios.

[0071] In one embodiment of the present disclosure, the feedback information includes reference signal received power RSRP.

[0072] In some embodiments, the feedback information may also be reference signal received quality RSRQ, signal to interference plus noise ratio or channel state information CSI, etc.

[0073] In this embodiment, feedback information including RSRP is sent to the second network device through the terminal. The second network device generates configuration information based on this feedback information and sends it down, so that the first network device can periodically switch the SSB beam according to the actual terminal signal reception status, thereby preventing unnecessary beam scanning and reducing hardware energy consumption. In addition, the RSRP-based beam control based on the terminal feedback can flexibly adjust the beam resources according to the dynamic scenario of the user, improve the user service quality, reduce the delay while ensuring high throughput, and thus achieve high-efficiency communication optimization.

[0074] like Figure 3 As shown, according to another embodiment of the present disclosure, the intelligent metasurface RIS control method is applied to a first network device, which includes multiple RIS elements, including:

[0075] Step S302: The SSB beam directed from the second network device to the first network device is forwarded based on the codebook level carried by the initial control information. After each SSB beam is forwarded to a terminal within the service range, the second network device determines the corresponding configuration information based on the feedback information of the terminal and sends it to the first network device.

[0076] In some embodiments, after the system is started, the RIS obtains initial control information including the codebook level.

[0077] In some embodiments, the initial control information may be indicated or predefined by the second network device.

[0078] In some embodiments, the RIS receives an SSB beam from a second network device, which carries broadcast system information and is used for terminal access to the network. The RIS forwards the beam according to the codebook level carried by the initial control information. The codebook level determines the number of RIS forwarding beams and their spatial direction and other characteristics, thereby forwarding the SSB beam to the terminal within its service range.

[0079] Step S304: periodically switch the forwarded SSB beam based on the configuration information.

[0080] In some embodiments, the configuration information may be indicated or predefined by the second network device.

[0081] In some embodiments, the RIS may periodically receive configuration information to perform switching operations on the forwarded SSB beams based on the configuration information. The switching operations mainly include adjusting the spatial direction and number of the forwarded SSB beams.

[0082] In this embodiment, the initial SSB beam forwarding is achieved by utilizing the codebook level, and configuration information is dynamically generated in combination with terminal feedback information, thereby periodically switching the forwarding beam. On the one hand, RIS performs targeted beam adjustment based on actual terminal feedback, which can reduce unnecessary beam scanning actions, thereby helping to reduce the hardware energy consumption of the second network device. On the other hand, compared with the method of excessively reducing the number of beams and sacrificing user service quality, beam resources are flexibly adjusted based on real-time terminal feedback, and optimal allocation of beam resources is achieved in dynamic user distribution scenarios. While improving system coverage performance, it takes into account the requirements of high throughput, low latency and high energy efficiency, thereby improving the overall performance of the communication system and user experience.

[0083] In one embodiment of the present disclosure, the codebook level represents the number of forwarding SSB beams supported by the RIS and the spatial direction of each forwarding SSB beam; the initial control information also includes a weight value corresponding to each RIS element, the weight value represents the weight of each RIS element in the RIS, and the weight represents the amplitude and / or phase of each SSB beam forwarded by the RIS element, wherein the number of forwarding SSB beams is determined based on the codebook level, and the spatial direction of each forwarding SSB beam is determined based on the codebook level, amplitude and / or phase.

[0084] In some embodiments, RIS determines the codebook level and weight value based on the configuration on the second network device side. The codebook level can represent the number of spatial directions that RIS supports for forwarding SSB beams and the spatial direction of forwarding each SSB beam. The weight value represents the weight of each RIS element and the spatial direction of forwarding each SSB beam. The weight is used to represent the amplitude and / or phase of the beam.

[0085] In some embodiments, the codebook level is a key starting parameter of the entire mechanism. First, the number of SSB beams supported by RIS for forwarding is determined based on the codebook level. The codebook level works together with the weight value corresponding to each RIS element to determine the spatial direction of the beam. The weight value of each RIS element can play a role by adjusting the amplitude and / or phase. Since different amplitude and phase combinations will produce different modulation effects on the signal, when these modulation effects determined by the weight values ​​act on different SSB beams, the approximate spatial direction framework preset by the codebook level is combined to determine the final direction of each forwarded SSB beam in space.

[0086] In this embodiment, the number and spatial direction of forwarding SSB beams are determined by combining the codebook level with the weight value, which is conducive to ensuring that beam resources can be reasonably allocated in different scenarios. In addition, the codebook level and weight value are used to control the amplitude and phase to determine the spatial direction of the beam, which is also conducive to improving the accuracy of signal coverage, so that the beam can be directed to the target area or user as much as possible in blocked areas, complex environments or dynamic user distribution scenarios.

[0087] In one embodiment of the present disclosure, forwarding the SSB beam directed from the second network device to the first network device includes periodically and sequentially forwarding the SSB beam to the terminal based on a time division multiplexing mechanism.

[0088] In this embodiment, a periodic timing arrangement is formulated for forwarding SSB beams to the terminal based on time division multiplexing. RIS forwards the corresponding SSB beams to the terminal according to a pre-set correspondence, thereby realizing periodic timed forwarding based on the time division multiplexing mechanism. This ensures that each SSB beam can reach the terminal in a certain pattern and order, thereby preventing conflicts and interference between beams.

[0089] In one embodiment of the present disclosure, the codebook level includes N+1 configurable levels, where N is a positive integer, and the SSB beam is periodically switched based on the configuration information sent by the second network device, including: in the periodic switching, if the first configuration information is received, the codebook level is increased based on the first configuration information, and the corresponding number of forwarded SSB beams is reduced based on the specified method.

[0090] In some embodiments, the codebook level set is {0, 1, ..., N}, which includes a total of N+1 configurable levels. When the codebook level increases, the number of forwarding SSB beams supported by RIS decreases in sequence according to a specified method, where the specified method is a predefined method or a method indicated by the network side.

[0091] In some embodiments, the codebook level is negatively correlated with the number of forwarded SSB beams.

[0092] In this embodiment, the configurability of the codebook level and the dynamic adjustment of the number of beams with the codebook level enable resource utilization in key areas by increasing the codebook level and reducing the number of beams in areas where user distribution is relatively concentrated and environmental interference is relatively easy to control, thereby concentrating energy in key areas, improving the communication quality and data transmission rate of users in key areas, and improving the spectrum efficiency of the system in these areas.

[0093] In one embodiment of the present disclosure, the codebook level includes N+1 configurable levels, where N is a positive integer, and the SSB beam is periodically switched based on the configuration information sent by the second network device, including: in the periodic switching, if the second configuration information is received, the codebook level is reduced based on the second configuration information, the number of corresponding forwarded SSB beams is increased based on a specified method, and the switching is stopped after the increase to maintain the increased number of SSB beams.

[0094] In some embodiments, the codebook level determines the accuracy and flexibility of beamforming. A higher codebook level means finer beam control, but it also takes up more resources. Therefore, when resources are limited, when increasing the codebook level, it is necessary to reduce the number of forwarded SSB beams based on a specified method to maintain the balance of system resources. If it increases to a certain level, it is necessary to lower the codebook level to increase the number of forwarded SSB beams. After increasing the number of SSB beams, switching can be stopped to prevent the codebook level from repeatedly increasing and decreasing, resulting in waste of resources.

[0095] In this embodiment, the RIS configuration is flexibly adjusted based on the actual number of terminals and their signal quality. When the first condition is met, increasing the codebook level can more accurately direct the beam to areas with concentrated users and good signal quality. Although the number of SSB beams is reduced, spectrum efficiency and data transmission accuracy are improved, making it suitable for scenarios with high data transmission rate requirements. When the first condition is not met, reducing the codebook level and increasing the number of SSB beams can expand signal coverage and enhance signal strength. This is particularly applicable to areas with dispersed users or poor signal quality, ensuring the basic communication needs of users in these areas. Furthermore, stopping switching and maintaining the increased number of SSB beams enables terminals to obtain stable signals, reduces signal fluctuations and interruptions, improves the user communication experience, and enables the communication system to achieve optimized and balanced performance in different network environments.

[0096] In some embodiments, the relationship between level and number of beams is as follows: Figure 4 As shown in the figure, when the codebook level increases, the number of forwarding SSB beams supported by RIS decreases exponentially. The maximum number of SSB beams supported by RIS is The relationship between the codebook level and the number of beams follows: The number of effective beams corresponding to the n-th level codebook (n∈{0,1,...,N}) is .

[0097] In some embodiments, as the codebook level increases, the number of forwarding SSB beams supported by RIS decreases in an arithmetic progression. In this example, the maximum number of SSB beams supported by RIS is aN (a is the expansion coefficient, which is a positive integer). The relationship between codebook level and number of beams follows: when n∈{0,1,...,N-1}, the number of effective beams corresponding to the n-th level codebook is a(Nn); when n=N, the number of effective beams corresponding to the N-th level codebook is 1.

[0098] In one embodiment of the present disclosure, it also includes: if second configuration information is received in the next switching cycle, the second configuration information has the same codebook level as the previous switching cycle, and the number of forwarded SSB beams remains unchanged.

[0099] In this embodiment, when achieving the requirements of high throughput, low latency and high energy efficiency, if the second configuration information is received, the second configuration information has the same codebook level as the previous switching cycle, and the number of forwarded SSB beams remains unchanged, which helps to maintain the stability of the communication system and enables the terminal to continue to receive signals with stable strength.

[0100] In one embodiment of the present disclosure, the designated manner is a decrement manner predefined by the second network device, or a decrement manner indicated by the second network device.

[0101] In one embodiment of the present disclosure, the SSB beam directed from the second network device to the first network device is forwarded based on the codebook level carried by the initial control information, including: the initial control information carries a minimum codebook level, so as to determine the maximum number of corresponding forwarded SSB beams based on the minimum codebook level, and forward the SSB beam based on the maximum number.

[0102] In this embodiment, the RIS determines the number of forwarded SSBs based on the codebook level parameter carried in the initial control information sent by the network side, and periodically and dynamically switches the forwarded SSB beams.

[0103] like Figure 5 As shown, according to another embodiment of the present disclosure, the intelligent metasurface RIS control method is applied to a second network device, including:

[0104] Step S502: receiving feedback information sent by a terminal served by the RIS, where the feedback information is generated based on the SSB beam forwarded by the first network device.

[0105] Step S504: Generate corresponding configuration information based on the feedback information.

[0106] In some embodiments, after receiving the feedback information sent by the terminal, the base station performs detailed analysis and processing on it. The processing module inside the base station will analyze the various data in the feedback information based on pre-set algorithms and strategies. For example, if the feedback information shows that the RSRP received by the terminal is low, it means that the signal strength is insufficient. The base station may determine that the current SSB beam configuration needs to be adjusted to enhance signal coverage.

[0107] In some embodiments, based on the analysis results, the base station generates corresponding configuration information, which will be used to adjust parameters such as the number of SSB beams forwarded by the first network device to optimize the signal transmission effect and meet the communication needs of the terminal.

[0108] Step S506: Send the configuration information to the first network device so that the first network device periodically switches the SSB beam based on the configuration information.

[0109] In this embodiment, the terminal generates feedback information based on the SSB beam, and the base station can accurately obtain the actual signal reception situation of the terminal, and then generate configuration information in a targeted manner to prevent blind beam scanning and resource allocation, thereby reducing hardware energy consumption. The first network device periodically switches the SSB beam according to the configuration information, so that the signal coverage can be dynamically adjusted according to the terminal needs, and the optimal allocation of beam resources is achieved in the dynamic user distribution scenario. The terminal can receive a stronger and more stable signal, improve the signal quality, meet the communication needs of high throughput and low latency, and comprehensively improve the overall performance and user experience of the communication system in complex environments.

[0110] In one embodiment of the present disclosure, generating corresponding configuration information based on feedback information includes:

[0111] The number of terminals within the RIS service range and the RSRPs of the terminals within the RIS service range are determined based on the feedback information; and corresponding configuration information is generated based on the number of terminals and the RSRPs of the terminals.

[0112] In some embodiments, the RSRP of the terminal may also be replaced by the reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR) or channel state information (CSI) of the terminal.

[0113] In this embodiment, accurate beam adjustment can be achieved by determining the number of terminals within the RIS service range and the RSRP of the terminals based on the feedback information and generating configuration information accordingly.

[0114] In one embodiment of the present disclosure, corresponding configuration information is generated based on the number of terminals and the RSRP of the terminals, including: detecting whether the number of terminals and the RSRP of the terminals meet a first condition; if the first condition is met, generating first configuration information; if the first condition is not met, generating second configuration information, wherein the first configuration information is suitable for enabling the first network device to continue to periodically switch the SSB beam, and the second configuration information is suitable for enabling the first network device to stop periodically switching the SSB beam.

[0115] In some embodiments, the second network device side determines the number of terminals within the RIS service range and the RSRP of each user within the RIS service range based on the feedback information of the UE, and the second network device generates first configuration information based on whether the first condition is met. If the first condition is met, the second network device generates second configuration information; otherwise, the second network device generates second configuration information.

[0116] In this embodiment, when the detection result meets the first condition, it indicates that the network is operating in a good state. The first configuration information generated at this time allows the terminal to continue to send feedback information, which helps the system to continuously track dynamic changes in the network and maintain accurate monitoring of the network status. If the first condition is not met, it means that the network may have abnormal conditions such as poor signal, too dense or sparse users, etc. The second configuration information generated reconfigures the number of SSB beams or maintains the number of SSB beams, causing the first network device to stop periodically switching the SSB beams. At this time, continuing to collect feedback information may not effectively improve the network status, but instead increase the network burden. Stopping feedback helps the system focus resources on addressing current network issues, such as adjusting beam configuration and optimizing resource allocation.

[0117] In one embodiment of the present disclosure, the first configuration information includes: the codebook level is increased based on the first variable so that the number of forwarded SSB beams corresponding to the first network device is reduced based on a specified method, wherein the first variable is a positive integer, the codebook level includes N+1 configurable levels, the sum of the codebook level before the increase and the first variable is less than or equal to the maximum codebook level, and if the codebook level increases to the maximum codebook level N, the increase of the codebook level is stopped.

[0118] In some embodiments, the first configuration information includes a value of the network side configured beam level that is incremented by y (the value of y is a positive integer, y is greater than or equal to 0, and the sum of the current beam level and y must be less than or equal to N).

[0119] In one embodiment of the present disclosure, the second configuration information includes: the codebook level is reduced based on the second variable so that the number of forwarded SSB beams corresponding to the first network device increases based on a specified method, and switching is stopped after the increase to maintain the increased number of SSB beams, wherein the second variable is a positive integer, the second variable is less than the value of the current codebook level of the first network device, or the second variable is less than the value of the current beam level of the first network device, wherein the value of the current codebook level is less than or equal to the maximum codebook level N; or the codebook level remains unchanged, wherein the value of the current codebook level is less than the maximum codebook level N.

[0120] In some embodiments, the second configuration information involves adjusting the codebook level according to a second variable, where the second variable is a positive integer and satisfies the requirement of being less than the value of the current codebook level or the current beam level of the first network device (the value of the current codebook level is less than or equal to the maximum codebook level N). By reducing the codebook level based on the second variable, the number of forwarded SSB beams corresponding to the first network device can be increased in a specified manner. After the number of SSB beams increases, switching is stopped to maintain the increased number. In this way, the SSB beam number state can be maintained stably, so that the number of beams will not be too large, and the RSRP will not be too large, resulting in waste of resources.

[0121] In some embodiments, when the value of the current codebook level is less than the maximum codebook level N, the second configuration information may also indicate that the codebook level remains unchanged. This may be because the current codebook level and the configuration of the number of SSB beams can already meet the performance requirements of the system and no adjustment is required, or it may be more appropriate to maintain the existing configuration due to considerations of other factors such as system stability and resource allocation.

[0122] In some embodiments, the second configuration information includes:

[0123] The value of the codebook level configured on the network side is decremented by z (the value of z is a positive integer, z is greater than or equal to 0, and less than or equal to the value of the current beam level).

[0124] Or it is characterized in that the value of the codebook level configured on the network side decreases by z (the value of z is a positive integer, z is greater than or equal to 0, and less than or equal to the value of the current beam level).

[0125] Or the codebook level value configured on the network side remains unchanged.

[0126] In one embodiment of the present disclosure, if the second condition is met, it is determined that the first condition is met.

[0127] In one embodiment of the present disclosure, the second condition includes any one of a plurality of second sub-conditions, and the plurality of second sub-conditions include:

[0128] The difference between the RSRP of all terminals served by the RIS and the first threshold is greater than or equal to the second threshold; the difference between the RSRP of at least one terminal served by the RIS and the first threshold is greater than or equal to the second threshold; the difference between the RSRP of at least M terminals served by the RIS and the first threshold is greater than or equal to the second threshold, where M is a positive integer.

[0129] In one embodiment of the present disclosure, M is a first parameter preset by the second network device, and the first parameter is determined based on the total number of terminals served by the RIS and a preset percentage value; or M is determined based on the total number of terminals served by the RIS and any one of a preset percentage set; or M is a second parameter preset by the second network device, and the second parameter is determined based on the total number of terminals served by the second network device and a preset percentage value; or M is determined based on the total number of terminals served by the second network device and any one of a preset percentage set.

[0130] In some embodiments, M is a parameter configured on the network side, and M is |{20%, 30%, 50%, xx%} The total number of UEs served by RIS | rounded down or up.

[0131] Or the default value of M is 20%, or 30%, or 50%, or the lower or upper integer of xx% of the total number of UEs served by the RIS.

[0132] Or M is a parameter configured on the network side, where M is |{20%, 30%, 50%, xx%} The total number of UEs served by the network side | is rounded down or up.

[0133] Or the default value of M is the parameter configured on the network side, M is |{20%, 30%, 50%, xx%} The total number of UEs served by the network side | is rounded down or up.

[0134] In one embodiment of the present disclosure, the first threshold is a threshold value predefined by the communication system; or the first threshold is a threshold value preconfigured by the second network device; or the first threshold is a threshold value indicated by the second network device; or the first threshold is a threshold value configured by the second network device, wherein the first threshold is a fixed value, or the first threshold changes based on different instructions of the second network device.

[0135] In one embodiment of the present disclosure, the second threshold is a threshold value predefined by the communication system; or the second threshold is a threshold value preconfigured by the second network device; or the second threshold is a threshold value indicated by the second network device; or the second threshold is a threshold value configured by the second network device, wherein the second threshold is a fixed value, or the second threshold changes based on different instructions of the second network device.

[0136] In Example 1, Figure 6 As shown in the figure, the system consists of a base station (BS), a RIS, and K users, with user IDs UE#1, UE#2, ..., UE#8. The maximum number of beams supported by the RIS is 16. During initialization, the RIS, based on the codebook information in the control information sent by the base station, confirms the current codebook level as level 0, the number of SSB forwarding beams as 16, and the weights per unit to determine the 16 SSB beam directions. The RIS uses time-division multiplexing to forward the SSB beams directed by the base station to the RIS. After beam scanning, the base station confirms that UE#1, UE#2, UE#3, and UE#4 are served by the RIS based on the SSB_index reported by the UE. The first threshold is configured by the base station to -85dB, and the second threshold is configured to 3dB. The base station confirms that the RSRP reported by UE#1 to UE#4 are -80dB, -79dB, -78dB, and -81dB, respectively.

[0137] In the following embodiments, UERIS refers to a UE served by a RIS.

[0138] In Example 1, within one cycle, the differences between the RSRP of all four UERIS and the first threshold are 5dB, 6dB, 7dB, and 4dB, respectively, all greater than the second threshold. This meets the condition that the differences between the RSRP fed back by all UERIS and the first threshold are greater than the second threshold. The RIS confirms, based on the configuration information sent by the base station, that the codebook level is level 1, the number of SSB forwarding beams is 8, and the weight of each unit is used to confirm the directions of the 8 SSB beams.

[0139] In Example 1, in the next cycle, the base station confirms that the RSRP fed back by UE#1~UE#4 are -86dB, -80dB, -79dB, and -85dB respectively according to the current system configuration, and the differences between the RSRP of all four UERIS and the first threshold are -1dB, 5dB, 6dB, and 0dB respectively. It does not meet the situation that the difference between the RSRP fed back by all UERIS and the first threshold is greater than the second threshold, and the RIS maintains the current codebook level.

[0140] In Example 2, there is one base station, one RIS and eight users in the system, whose user IDs are UE#1, UE#2, ..., UE#8 respectively. The maximum number of beams supported by the RIS is four.

[0141] In Example 2, during the initialization process, the RIS confirms that the current codebook level is level 0, the number of SSB forwarding beams is 4, and the weight of each unit is used to confirm the directions of the 4 SSB beams based on the codebook information in the initial control information sent by the base station. The RIS uses a time-division multiplexing transmission method to forward the SSB beam pointed by the base station to the RIS. After beam scanning, the base station confirms that UE#1 and UE#2 are served by the RIS based on the SSB_index fed back by the UE. The first threshold is configured by the base station side to -85dB, and the second threshold is configured by the base station side to 5dB. The base station confirms that the RSRP fed back by UE#1 and UE#2 are -80dB and -79dB, respectively.

[0142] In Example 2, within one cycle, the differences between the RSRP of UE#1 and UE#2 and the first threshold are 5 dB and 6 dB, respectively. This satisfies the condition that the difference between the RSRP fed back by at least one UE RIS and the first threshold is greater than or equal to the second threshold. Based on the configuration information sent by the base station, the RIS confirms that the codebook level is level 1, the number of SSB forwarding beams is 2, and the weight of each unit is used to confirm the directions of the two SSB beams.

[0143] In Example 2, during the next cycle, the base station confirms, based on the current system configuration, that the RSRP reported by UE#1 and UE#2 are -81dB and -80dB, respectively. The RSRP differences between UE#1 and UE#2 and the first threshold are 4dB and 5dB, respectively, and the difference between the RSRP reported by at least one UE and the first threshold is greater than or equal to the second threshold. Based on the configuration information sent by the base station, the RIS confirms the codebook level is level 2, the number of SSB forwarding beams is 1, and the per-unit weight to determine the direction of this SSB beam.

[0144] In Example 2, during the next cycle, the base station confirms, based on the current system configuration, that the RSRP reported by UE#1 and UE#2 are -82dB and -80dB, respectively. The RSRP differences between UE#1 and UE#2 and the first threshold are 3dB and 5dB, respectively. If the difference between the RSRP reported by at least one UE RIS and the first threshold is greater than or equal to the second threshold, the RIS has reached the maximum codebook level N, and codebook level increments are stopped, maintaining the current configuration.

[0145] In Example 3, there is one base station, one RIS and eight users in the system. The user IDs are UE#1, UE#2, ..., UE#8 respectively. The maximum number of beams supported by the RIS is 16.

[0146] In Example 3, during initialization, the RIS confirms the current codebook level as level 0, the number of SSB forwarding beams as 16, and the weights per unit to identify the 16 SSB beam directions based on the codebook information in the initial control information sent by the base station. The RIS uses time-division multiplexing to forward the SSB beams directed by the base station to the RIS. After beam scanning, the base station confirms that UE#1, UE#2, UE#3, and UE#4 are served by the RIS based on the SSB_index fed back by the UE. The first threshold is configured by the base station to -85dB, and the second threshold is configured by the base station to 3dB. The base station confirms that the RSRPs reported by UE#1 to UE#4 are -80dB, -79dB, -78dB, and -81dB, respectively.

[0147] In Example 3, within one cycle, the differences between the RSRP of all four UERIS and the first threshold are 5dB, 6dB, 7dB, and 4dB, respectively, all greater than the second threshold. This satisfies the condition that the differences between the RSRP fed back by at least two UERIS and the first threshold are greater than or equal to the second threshold. The RIS confirms, based on the configuration information sent by the base station, that the codebook level is level 1, the number of SSB forwarding beams is 8, and the weight of each unit is used to confirm the directions of the 8 SSB beams.

[0148] In Example 3, in the next cycle, the base station confirms that the RSRP fed back by UE#1~UE#4 are -86dB, -80dB, -79dB, and -85dB respectively according to the current system configuration, and the differences between the RSRP of all four UERIS and the first threshold are -1dB, 5dB, 6dB, and 0dB respectively, which meets the situation that the differences between the RSRP fed back by at least two UERIS and the first threshold are greater than or equal to the second threshold. According to the configuration information sent by the base station, the RIS confirms that the codebook level is level 2, the number of SSB forwarding beams is 4, and the weight of each unit is used to confirm the directions of the four SSB beams.

[0149] In Example 3, in the next cycle, the base station confirms that the RSRP fed back by UE#1 to UE#4 are -88dB, -84dB, -81dB, and -89dB respectively according to the current system configuration, and the differences between the RSRP of all four UERIS and the first threshold are -3dB, 1dB, 4dB, and -4dB respectively. If the difference between the RSRP fed back by at least two UERIS and the first threshold is greater than or equal to the second threshold, the RIS maintains the current codebook level.

[0150] In Example 4, there is one base station, one RIS and eight users in the system. The user IDs are UE#1, UE#2, ..., UE#8 respectively. The maximum number of beams supported by the RIS is 16.

[0151] During initialization, the RIS determines the current codebook level as level 0, the number of SSB forwarding beams as 16, and the weights per unit to identify the 16 SSB beam directions based on the codebook information in the initial control information sent by the base station. The RIS uses time-division multiplexing to forward the SSB beams directed by the base station to the RIS. After beam scanning, the base station confirms that UE#1, UE#2, UE#3, and UE#4 are served by the RIS based on the SSB_index reported by the UE. The first threshold is configured by the base station to -85dB, and the second threshold is configured to 3dB. The base station confirms that the RSRP reported by UE#1 to UE#4 are -80dB, -79dB, -78dB, and -81dB, respectively.

[0152] In Example 4, within one cycle, the differences between the RSRP of all four UERIS and the first threshold are 5dB, 6dB, 7dB, and 4dB, respectively, all greater than the second threshold. This satisfies the condition that the differences between the RSRP fed back by at least two UERIS and the first threshold are greater than or equal to the second threshold. The RIS confirms, based on the configuration information sent by the base station, that the codebook level is level 1, the number of SSB forwarding beams is 8, and the weight of each unit is used to confirm the directions of the 8 SSB beams.

[0153] In Example 4, during the next cycle, the base station confirms, based on the current system configuration, that the RSRP reported by UE#1 to UE#4 are -88dB, -84dB, -81dB, and -89dB, respectively. The differences between the RSRP of all four UEs and the first threshold are -3dB, 1dB, 4dB, and -4dB, respectively. If the difference between the RSRP reported by at least two UEs and the first threshold is greater than or equal to the second threshold, the RIS maintains the current codebook level.

[0154] In Example 5, there is one base station, one RIS and eight users in the system. The user IDs are UE#1, UE#2, ..., UE#8 respectively. The maximum number of beams supported by the RIS is 16.

[0155] During initialization, the RIS uses the codebook information in the initial control information sent by the base station to confirm the current codebook level as level 0, the number of SSB forwarding beams as 16, and the weights per unit to determine the 16 SSB beam directions. The RIS uses time-division multiplexing to forward the SSB beams directed by the base station to the RIS. After beam scanning, the base station confirms that UE#1, UE#2, UE#3, and UE#4 are served by the RIS based on the SSB_index reported by the UE. The first threshold is configured by the base station to -85dB, and the second threshold is configured by the base station to 3dB. The base station confirms that the RSRP reported by UE#1 to UE#4 are -80dB, -79dB, -78dB, and -81dB, respectively.

[0156] In Example 5, within one cycle, the differences between the RSRP of all four UERIS and the first threshold are 5dB, 6dB, 7dB, and 4dB, respectively, all greater than the second threshold. This satisfies the condition that the differences between the RSRP fed back by at least two UERIS and the first threshold are greater than or equal to the second threshold. The RIS confirms, based on the control information sent by the base station, that the codebook level is level 1, the number of SSB forwarding beams is 8, and the weight of each unit is used to confirm the directions of the 8 SSB beams.

[0157] In Example 5, in the next cycle, the base station confirms, based on the current system configuration, that the RSRPs fed back by UE#1 to UE#4 are -86dB, -80dB, -79dB, and -85dB, respectively. The differences between the RSRPs of all four UERIS and the first threshold are -1dB, 5dB, 6dB, and 0dB, respectively. This satisfies the condition that the differences between the RSRPs fed back by at least two UERIS and the first threshold are greater than or equal to the second threshold. RIS confirms, based on the control information sent by the base station, that the codebook level is level 2, the number of SSB forwarding beams is 4, and the weight of each unit is used to confirm the directions of the four SSB beams.

[0158] In Example 5, in the next cycle, the base station confirms that the RSRP fed back by UE#1 to UE#4 are -88dB, -84dB, -81dB, and -89dB respectively according to the current system configuration, and the differences between the RSRP of all four UERIS and the first threshold are -3dB, 1dB, 4dB, and -4dB respectively. If the difference between the RSRP fed back by at least two UERIS and the first threshold is greater than or equal to the second threshold, the RIS falls back to the previous codebook Level.

[0159] In one embodiment of the present disclosure, if the second condition and the third condition are satisfied at the same time, it is determined that the first condition is satisfied.

[0160] In one embodiment of the present disclosure, the third condition includes any one of a plurality of third sub-conditions, and the plurality of third sub-conditions include:

[0161] The difference between the RSRP of all terminals served by the RIS and the first threshold is smaller than the third threshold; the difference between the RSRP of at least one terminal served by the RIS and the first threshold is smaller than the third threshold; the difference between the RSRP of at least Q terminals served by the RIS and the first threshold is smaller than the third threshold, where Q is a positive integer.

[0162] The third threshold is greater than the second threshold.

[0163] In some embodiments, implementations that simultaneously satisfy the second and third conditions include, but are not limited to:

[0164] The difference between the RSRP of all terminals served by the RIS and the first threshold is greater than or equal to the second threshold and less than the third threshold.

[0165] A difference between the RSRP of at least one terminal served by the RIS and the first threshold is greater than or equal to the second threshold and less than a third threshold.

[0166] The difference between the RSRP of at least Q terminals served by the RIS and the first threshold is greater than or equal to the second threshold and less than the third threshold, where Q is a positive integer.

[0167] In one embodiment of the present disclosure, Q is a third parameter preset by the second network device, and the third parameter is determined based on the total number of terminals served by the RIS and a preset percentage value; or Q is determined based on the total number of terminals served by the RIS and any one of a preset percentage set; or Q is a fourth parameter preset by the second network device, and the fourth parameter is determined based on the total number of terminals served by the second network device and a preset percentage value; or Q is determined based on the total number of terminals served by the second network device and any one of a preset percentage set.

[0168] In some embodiments, Q is a parameter configured on the network side, and Q is |{20%, 30%, 50%, xx%} The total number of UEs served by RIS | rounded down or up.

[0169] Or the default value of Q is 20%, or 30%, or 50%, or the lower or upper integer of xx% of the total number of UEs served by the RIS.

[0170] Or Q is the parameter configured on the network side, and M is |{20%, 30%, 50%, xx%} The total number of UEs served by the network side | is rounded down or up.

[0171] Or the default value of Q is the parameter configured on the network side, and M is |{20%, 30%, 50%, xx%} The total number of UEs served by the network side | is rounded down or up.

[0172] In one embodiment of the present disclosure, the third threshold is a threshold value predefined by the communication system; or the third threshold is a threshold value preconfigured by the second network device; or the third threshold is a threshold value indicated by the second network device; or the third threshold is a threshold value configured by the second network device, the third threshold is a fixed value, or the third threshold changes based on different instructions of the second network device.

[0173] like Figure 7 As shown, according to another embodiment of the present disclosure, a smart metasurface RIS control method includes:

[0174] Step S702: RIS performs initialization processing according to the control information configured on the network side, confirming that the current codebook level is 0, the number of beams and the unit weights.

[0175] Step S704: The second network device confirms the terminal served by the RIS based on the information fed back by the UE.

[0176] Step S706: The second network device confirms the RSRP of the terminal served by the RIS.

[0177] Step S708, check whether RSRP meets the first condition, if "yes", go to step S710, if "no", go to step S712.

[0178] In step S710, the RIS confirms the value of the codebook level and the weight of the RIS element according to the first configuration information of the second network device. The codebook level increases by y, and the number of forwarding SSB beams supported decreases.

[0179] In step S712, the RIS confirms the codebook level value and the RIS element weight according to the second configuration information of the second network device. The codebook level value decreases by z, and the number of supported forwarding SSB beams increases, or the codebook level configured by the second network device remains unchanged.

[0180] In this embodiment,

[0181] It should be noted that the above figures are merely illustrative of the processes included in the method according to exemplary embodiments of the present invention and are not intended to be limiting. It is readily understood that the processes illustrated in the above figures do not indicate or limit the temporal order of these processes. Furthermore, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0182] Refer to the following Figure 8 hereinafter, a smart metasurface RIS control device 800 according to an embodiment of the present invention is described. Figure 8 The intelligent metasurface RIS control device 800 shown is merely an example and should not limit the functions and scope of use of the embodiments of the present invention.

[0183] The intelligent metasurface RIS control device 800 is implemented as a hardware module. Its components may include, but are not limited to, a sending module 802 for determining that the RIS service is being used in response to a received SSB beam forwarded by a first network device, and sending feedback information to a second network device. The first network device includes multiple RIS components, so that the second network device generates corresponding configuration information based on the feedback information and sends the configuration information to the first network device, so that the first network device periodically switches the SSB beam based on the configuration information.

[0184] Refer to the following Figure 9 hereinafter, a smart metasurface RIS control device 900 according to an embodiment of the present invention is described. Figure 9 The intelligent metasurface RIS control device 900 shown is merely an example and should not limit the functions and scope of use of the embodiments of the present invention.

[0185] The intelligent metasurface RIS control device 900 is implemented as a hardware module. Its components may include, but are not limited to: a forwarding module 902 for forwarding an SSB beam directed from a second network device to a first network device based on the codebook level carried in the initial control information. After each SSB beam is forwarded to a terminal within its service range, the second network device determines corresponding configuration information based on the terminal's feedback information and sends it to the first network device; and a switching module 904 for periodically switching the forwarded SSB beam based on the configuration information.

[0186] Refer to the following Figure 10 hereinafter, a smart metasurface RIS control device 1000 according to an embodiment of the present invention is described. Figure 10 The intelligent metasurface RIS control device 1000 shown is merely an example and should not limit the functions and scope of use of the embodiments of the present invention.

[0187] The intelligent metasurface RIS control device 1000 is implemented as a hardware module. Its components may include, but are not limited to: a receiving module 1002 for receiving feedback information sent by a terminal served by the RIS, the feedback information being generated based on the SSB beam forwarded by the first network device; a generating module 1004 for generating corresponding configuration information based on the feedback information; and a sending module 1006 for sending the configuration information to the first network device, so that the first network device periodically switches the SSB beam based on the configuration information.

[0188] Those skilled in the art will appreciate that various aspects of the present invention may be implemented as systems, methods, or program products. Therefore, various aspects of the present invention may be implemented in the following forms: entirely in hardware, entirely in software (including firmware, microcode, etc.), or in a combination of hardware and software, collectively referred to herein as "circuits," "modules," or "systems."

[0189] Refer to the following Figure 11 1 and 2 are used to describe the electronic device 1100 according to this embodiment of the present invention. The electronic device 1100 may be a network device or a terminal. Figure 11 The electronic device 1100 shown is merely an example and should not limit the functions and scope of use of the embodiments of the present invention.

[0190] like Figure 11 As shown, electronic device 1100 is implemented as a general-purpose computing device. Components of electronic device 1100 may include, but are not limited to, the aforementioned at least one processing unit 1110, the aforementioned at least one storage unit 1120, and a bus 1130 connecting various system components (including storage unit 1120 and processing unit 1110).

[0191] The storage unit stores program codes, which can be executed by the processing unit 1110, so that the processing unit 1110 performs the steps according to various exemplary embodiments of the present invention described in the above “Exemplary Method” section of this specification. For example, the processing unit 1110 can perform the following steps: Figure 2 The described scheme.

[0192] The storage unit 1120 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 11201 and / or a cache memory unit 11202 , and may further include a read-only memory unit (ROM) 11203 .

[0193] The storage unit 1120 may also include a program / utility 11204 having a set (at least one) of program modules 11205, such program modules 11205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0194] The bus 1130 may represent one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0195] Electronic device 1100 can also communicate with one or more external devices 1170 (e.g., a keyboard, pointing device, Bluetooth device, etc.), one or more devices that enable a user to interact with electronic device 1100, and / or any device that enables electronic device 1100 to communicate with one or more other computing devices (e.g., a router, modem, etc.). This communication can occur via input / output (I / O) interface 1150. Furthermore, electronic device 1100 can communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network such as the Internet) via network adapter 1160. As shown, network adapter 1160 communicates with other modules of electronic device 1100 via bus 1130. It should be understood that, although not shown, other hardware and / or software modules can be used in conjunction with electronic device 1100, including but not limited to microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0196] Through the description of the above embodiments, it will be readily understood by those skilled in the art that the example embodiments described herein can be implemented via software or via a combination of software and necessary hardware. Therefore, the technical solutions according to the embodiments of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, or mobile hard drive) or on a network and includes several instructions for enabling a computing device (such as a personal computer, server, terminal device, or network device) to execute the methods according to the embodiments of the present disclosure.

[0197] In exemplary embodiments of the present disclosure, a computer-readable storage medium is also provided, on which a program product capable of implementing the above-described methods of this specification is stored. In some possible implementations, various aspects of the present invention may also be implemented in the form of a program product, which includes program code. When the program product is executed on an electronic device, the program code is used to cause the electronic device to perform the steps according to various exemplary embodiments of the present invention described in the "Exemplary Methods" section of this specification.

[0198] According to an embodiment of the present invention, a program product for implementing the above-mentioned method can be a portable compact disc read-only memory (CD-ROM) and include program code, and can be run on an electronic device, such as a personal computer. However, the program product of the present invention is not limited thereto. In this document, a readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0199] The program product may utilize any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or component, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection having one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0200] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium that can transmit, propagate, or transfer a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0201] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0202] Program code for performing the operations of the present invention can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user computing device, partially on the user device, as a stand-alone software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device can be connected to the user computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0203] It should be noted that although several modules or units of the device for action execution are mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more modules or units described above can be concretized in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided into multiple modules or units to be concretized.

[0204] Furthermore, although the steps of the method of the present disclosure are described in a particular order in the accompanying drawings, this does not require or imply that the steps must be performed in this particular order, or that all steps shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0205] Through the description of the above embodiments, it will be readily understood by those skilled in the art that the example embodiments described herein can be implemented via software or via a combination of software and necessary hardware. Therefore, the technical solutions according to the embodiments of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, or mobile hard drive) or on a network and includes several instructions for enabling a computing device (such as a personal computer, server, mobile terminal, or network device) to execute the methods according to the embodiments of the present disclosure.

[0206] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A smart metasurface RIS control method, characterized in that: Applied to terminals, including: In response to the received SSB beam forwarded by the first network device RIS based on the codebook level carried by the initial control information, feedback information is sent to the second network device, so that the second network device generates corresponding configuration information based on the feedback information, and sends the configuration information to the first network device RIS, so that the first network device RIS periodically switches the SSB beam based on the configuration information. The first network device RIS includes multiple RIS elements, and the periodic switching includes periodically adjusting the spatial direction and number of forwarding the SSB beam. The codebook level is negatively correlated with the number of forwarded SSB beams, so that the number of forwarded SSB beams is dynamically adjusted with the codebook level.

2. The intelligent metasurface RIS control method according to claim 1, characterized in that: The feedback information includes reference signal received power RSRP.

3. A smart metasurface RIS control method, characterized in that: Applied to a first network device RIS, the first network device RIS includes multiple RIS elements, including: forwarding the SSB beam directed from the second network device to the first network device RIS based on the codebook level carried in the initial control information, wherein after each forwarding of the SSB beam to a terminal within the service range, the second network device determines corresponding configuration information based on feedback information from the terminal and sends the corresponding configuration information to the first network device RIS; The forwarded SSB beam is periodically switched based on the received configuration information, and the periodic switching includes periodically adjusting the spatial direction and number of the forwarded SSB beam. The codebook level is negatively correlated with the number of forwarded SSB beams, so that the number of forwarded SSB beams is dynamically adjusted with the codebook level.

4. The intelligent metasurface RIS control method according to claim 3, characterized in that: The codebook level represents the number of forwarding SSB beams supported by the first network device RIS and the spatial direction of each forwarding SSB beam; The initial control information also includes a weight value corresponding to each RIS element, wherein the weight value represents the weight of each RIS element in the first network device RIS, and the weight represents the amplitude and / or phase of each SSB beam forwarded by the RIS element. The number of the forwarding SSB beams is determined based on the codebook level, and the spatial direction of each of the forwarding SSB beams is determined based on the codebook level, the amplitude and / or the phase.

5. The intelligent metasurface RIS control method according to claim 3, characterized in that: Forwarding an SSB beam directed from the second network device to the RIS of the first network device, including: The SSB beam is periodically and sequentially forwarded to the terminal based on a time division multiplexing mechanism.

6. The intelligent metasurface RIS control method according to claim 3, characterized in that: The codebook level includes N+1 configurable levels, where N is a positive integer, and periodically switching the forwarded SSB beam based on the received configuration information includes: In the periodic switching, if the received configuration information is the first configuration information, the codebook level is increased based on the first configuration information, and the number of the corresponding forwarded SSB beams is reduced based on a specified method.

7. The intelligent metasurface RIS control method according to claim 3, characterized in that: The codebook level includes N+1 configurable levels, where N is a positive integer, and periodically switching the forwarded SSB beam based on the received configuration information includes: In the periodic switching, if the received configuration information is the second configuration information, the codebook level is reduced based on the second configuration information, the number of the corresponding forwarded SSB beams is increased based on a specified method, and the switching is stopped after the increase to maintain the increased number of SSB beams.

8. The intelligent metasurface RIS control method according to claim 7, characterized in that: Also includes: If the second configuration information received in the next switching cycle has the same codebook level as that in the previous switching cycle, the number of forwarded SSB beams remains unchanged.

9. The intelligent metasurface RIS control method according to claim 6 or 7, characterized in that: The initial control information is indicated or predefined by the second network device; The configuration information is indicated or predefined by the second network device; The designated manner is a manner predefined by the second network device, or a manner indicated by the second network device.

10. The intelligent metasurface RIS control method according to claim 3, characterized in that: Forwarding, based on the codebook level carried by the initial control information, an SSB beam directed from the second network device to the RIS of the first network device, including: The initial control information carries a minimum codebook level, and a corresponding maximum number of forwarding the SSB beams is determined based on the minimum codebook level, so as to forward the SSB beams based on the maximum number.

11. A smart metasurface RIS control method, characterized in that: Applicable to the second network device, including: Receiving feedback information sent by a terminal served by a first network device RIS, where the feedback information is based on SSB beamforming forwarded by the first network device RIS based on a codebook level carried in initial control information; generating corresponding configuration information based on the feedback information; The configuration information is sent down to the first network device RIS, so that the first network device RIS periodically switches the SSB beam based on the configuration information. The periodic switching includes periodically adjusting the spatial direction and number of forwarding the SSB beam. The codebook level is negatively correlated with the number of forwarding SSB beams, so that the number of forwarding SSB beams is dynamically adjusted with the codebook level.

12. The intelligent metasurface RIS control method according to claim 11, characterized in that: Generating corresponding configuration information based on the feedback information includes: Determine, based on the feedback information, the number of terminals within the service range of the first network device RIS and the RSRP of the terminals within the service range of the first network device RIS; The corresponding configuration information is generated based on the number of terminals and the RSRP of the terminals.

13. The intelligent metasurface RIS control method according to claim 12, characterized in that: Generating the corresponding configuration information based on the number of terminals and the RSRP of the terminals includes: Detecting whether the number of terminals and the RSRP of the terminals meet a first condition; If the first condition is met, generating first configuration information; If the first condition is not met, second configuration information is generated, wherein the first configuration information is suitable for the first network device RIS to continue to periodically switch the SSB beam, and the second configuration information is suitable for the first network device RIS to stop periodically switching the SSB beam.

14. The intelligent metasurface RIS control method according to claim 13, characterized in that: If the second condition is met, it is determined that the first condition is met.

15. The intelligent metasurface RIS control method according to claim 13, characterized in that: If the second condition and the third condition are met at the same time, it is determined that the first condition is met.

16. The intelligent metasurface RIS control method according to claim 13, characterized in that: The first configuration information includes: The codebook level negatively correlated with the SSB beam is increased based on a first variable so that the number of forwarded SSB beams of the first network device RIS is reduced based on a specified method, wherein the first variable is a positive integer, the codebook level includes N+1 configurable levels, the sum of the codebook level and the first variable before the increase is less than or equal to the maximum codebook level, and if the codebook level increases to the maximum codebook level, the increase of the codebook level is stopped.

17. The intelligent metasurface RIS control method according to claim 13, wherein: The second configuration information includes: A codebook level negatively correlated with the SSB beam is reduced based on a second variable so that the number of forwarded SSB beams of the first network device RIS is increased based on a specified manner, and the first network device RIS maintains the increased number of SSB beams, wherein the second variable is a positive integer, the second variable is less than the value of the current codebook level of the first network device RIS, or the second variable is less than the value of the current beam level of the first network device RIS, wherein the value of the current codebook level is less than or equal to the maximum codebook level; or The codebook level remains unchanged, wherein the value of the current codebook level is less than the maximum codebook level.

18. The intelligent metasurface RIS control method according to claim 14 or 15, characterized in that: The second condition includes any one of a plurality of second sub-conditions, wherein the plurality of second sub-conditions include: The difference between the RSRP of all the terminals served by the first network device RIS and the first threshold is greater than or equal to the second threshold; A difference between the RSRP of at least one terminal served by the first network device RIS and the first threshold is greater than or equal to the second threshold; The difference between the RSRP of at least M terminals served by the first network device RIS and the first threshold is greater than or equal to the second threshold, where M is a positive integer.

19. The intelligent metasurface RIS control method according to claim 18, wherein: M is a first parameter preset by the second network device, and the first parameter is determined based on the total number of the terminals served by the RIS of the first network device and a preset percentage value; or Determine M based on the total number of the terminals served by the first network device RIS and any one of a preset percentage set; or M is a second parameter preset by the second network device, and the second parameter is determined based on the total number of the terminals served by the second network device and the preset percentage value; or M is determined based on any one of the total number of the terminals served by the second network device and the preset percentage set.

20. The intelligent metasurface RIS control method according to claim 18, wherein: The first threshold is a threshold value predefined by the communication system; or The first threshold is a threshold value preconfigured by the second network device; or The first threshold is a threshold value indicated by the second network device; or The first threshold is a threshold value configured by the second network device, The first threshold is a fixed value, or the first threshold changes based on different instructions of the second network device.

21. The intelligent metasurface RIS control method according to claim 18, wherein: The second threshold is a threshold value predefined by the communication system; or The second threshold is a threshold value preconfigured by the second network device; or The second threshold is a threshold value indicated by the second network device; or The second threshold is a threshold value configured by the second network device, The second threshold is a fixed value, or the second threshold changes based on different instructions of the second network device.

22. The intelligent metasurface RIS control method according to claim 15, characterized in that: The third condition includes any one of a plurality of third sub-conditions, wherein the plurality of third sub-conditions include: The difference between the RSRP of all the terminals served by the first network device RIS and the first threshold is less than a third threshold; The difference between the RSRP of at least one terminal served by the first network device RIS and the first threshold is smaller than the third threshold; The difference between the RSRP of at least Q terminals served by the first network device RIS and the first threshold is smaller than the third threshold, where Q is a positive integer.

23. The intelligent metasurface RIS control method according to claim 22, wherein: Q is a third parameter preset by the second network device, and the third parameter is determined based on the total number of the terminals served by the RIS of the first network device and a preset percentage value; or Determine Q based on the total number of the terminals served by the first network device RIS and any one of a preset percentage set; or Q is a fourth parameter preset by the second network device, and the fourth parameter is determined based on the total number of the terminals served by the second network device and the preset percentage value; or Q is determined based on any one of the total number of the terminals served by the second network device and the preset percentage set.

24. The intelligent metasurface RIS control method according to claim 22, wherein: The third threshold is a threshold value predefined by the communication system; or The third threshold is a threshold value preconfigured by the second network device; or The third threshold is a threshold value indicated by the second network device; or The third threshold is a threshold value configured by the second network device, The third threshold is a fixed value, or the third threshold changes based on different instructions of the second network device.

25. An intelligent metasurface RIS control device, characterized in that: Applied to terminals, including: A sending module is used to send feedback information to a second network device in response to an SSB beam forwarded by a received first network device RIS based on a codebook level carried by initial control information, so that the second network device generates corresponding configuration information based on the feedback information, and sends the configuration information to the first network device RIS, so that the first network device RIS periodically switches the SSB beam based on the configuration information. The first network device RIS includes multiple RIS elements, and the periodic switching includes periodically adjusting the spatial direction and number of forwarding the SSB beam. The codebook level is negatively correlated with the number of forwarded SSB beams, so that the number of forwarded SSB beams is dynamically adjusted with the codebook level.

26. An intelligent metasurface RIS control device, characterized in that: Applied to a first network device RIS, the first network device RIS includes multiple RIS elements, including: a forwarding module, configured to forward the SSB beam directed from the second network device to the first network device RIS based on the codebook level carried in the initial control information, wherein after each forwarding of the SSB beam to a terminal within the service range, the second network device determines corresponding configuration information based on feedback information from the terminal and sends it to the first network device RIS; A switching module is used to periodically switch the forwarded SSB beam based on the received configuration information, wherein the periodic switching includes periodically adjusting the spatial direction and number of the forwarded SSB beam, and the codebook level is negatively correlated with the number of forwarded SSB beams, so that the number of forwarded SSB beams is dynamically adjusted with the codebook level.

27. An intelligent metasurface RIS control device, characterized in that: Applicable to the second network device, including: a receiving module, configured to receive feedback information sent by a terminal served by a first network device RIS, where the feedback information is based on SSB beamforming forwarded by the first network device RIS based on a codebook level carried by initial control information; A generating module, configured to generate corresponding configuration information based on the feedback information; A sending module is used to send the configuration information to the first network device RIS, so that the first network device RIS periodically switches the SSB beam based on the configuration information, and the periodic switching includes periodically adjusting the spatial direction and number of forwarding the SSB beam. The codebook level is negatively correlated with the number of forwarded SSB beams, so that the number of forwarded SSB beams is dynamically adjusted with the codebook level.

28. A terminal, characterized in that: include: processor; as well as a memory for storing executable instructions of the processor; Wherein, the processor is configured to execute the intelligent metasurface RIS control method according to claim 1 or 2 by executing the executable instructions.

29. A network device, characterized in that: include: processor; as well as a memory for storing executable instructions of the processor; The processor is configured to execute the intelligent metasurface RIS control method according to any one of claims 3 to 10 or 11 to 24 by executing the executable instructions.

30. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the intelligent metasurface RIS control method according to any one of claims 1 to 24 is implemented.

31. A computer program product having a computer program stored thereon, characterized in that When the computer program is executed by a processor, the intelligent metasurface RIS control method according to any one of claims 1 to 24 is implemented.

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