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

Abstract

The invention provides an RIS control method and device, network equipment, a storage medium and a program product, and relates to the technical field of wireless communication. The RIS control method comprises the following steps: 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 issues the configuration information to the first network device, and sending the configuration information to the first network equipment, so that the first network equipment performs periodic switching on the SSB beam based on the configuration information, and the first network equipment comprises a plurality of RIS elements. Through the technical scheme of the invention, since the RIS performs targeted beam adjustment according to the actual terminal feedback, unnecessary beam scanning actions can be reduced, optimal allocation of beam resources is realized in a dynamic user distribution scene, and the requirements of high throughput, low time delay and high energy efficiency are considered while the system coverage performance is improved.

Description

Background Art

[0002] In the NR (New Radio) system, the base station periodically sends SSB (Synchronization Signal Block) broadcast system information with specific beams for UEs to access the network. The Reconfigurable Intelligent Surface (RIS) can cover the blocked area by dynamically regulating the electromagnetic wave propagation environment. The base station only needs to configure the beam information to the RIS in advance to control its beam switching. However, when pursuing high coverage performance, a large number of beam scans need to be maintained, resulting in high hardware power consumption. If the number of beams is reduced excessively, the quality of user services will be sacrificed. Especially in the dynamic user distribution scenario, it is difficult to achieve the optimal allocation of beam resources and cannot meet the requirements of high throughput, low latency, and high energy efficiency simultaneously.

[0003] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure. Therefore, it may include information that does not constitute the prior art known to those of ordinary skill in the art. 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 can at least overcome the problem that beam resources in the related art cannot meet the requirements of high throughput, low latency, and high energy efficiency simultaneously.

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

[0006] According to an aspect of the present disclosure, there is provided an intelligent metasurface RIS control method, which is applied to a terminal and includes: in response to receiving an SSB beam forwarded by a first network device RIS, sending feedback information to a second network device, where the first network device RIS includes a plurality of 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 an embodiment of the present disclosure, the feedback information includes the Reference Signal Received Power (RSRP).

[0008] According to another aspect of the present disclosure, there is provided an intelligent metasurface RIS control method, which is applied to a first network device RIS. The first network device RIS includes a plurality of RIS elements, and includes: forwarding the SSB beam of the second network device pointing to the first network device RIS based on the codebook level carried in the initial control information, where after each forwarding of the SSB beam to a terminal within the service range, the second network device determines corresponding configuration information based on the feedback information of the terminal and issues it to the first network device RIS; periodically switching the forwarded SSB beam based on the received configuration information.

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

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

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

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

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

[0014] In an 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; the specified manner is a manner predefined by the second network device or a manner indicated by the second network device.

[0015] In an embodiment of the present disclosure, forwarding the SSB beams pointed by the second network device to the RIS of the first network device based on the codebook level carried in the initial control information includes: the initial control information carries the minimum codebook level, determining the maximum number of the forwarded SSB beams corresponding to the minimum codebook level, and forwarding the SSB beams based on the maximum number.

[0016] According to still another aspect of the present disclosure, there is provided an intelligent metasurface RIS control method, which is applied to a second network device and includes: receiving feedback information sent by a terminal served by the RIS of a first network device, where the feedback information is generated based on the SSB beams forwarded by the RIS of the first network device; generating corresponding configuration information based on the feedback information; and sending the configuration information to the RIS of the first network device, so that the RIS of the first network device performs periodic switching on the SSB beams based on the configuration information.

[0017] In an 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 RSRP 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 RSRP of the terminals.

[0018] In an embodiment of the present disclosure, 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, generating second configuration information, where the first configuration information is suitable for enabling the RIS of the first network device to continue performing periodic switching on the SSB beams, and the second configuration information is suitable for enabling the RIS of the first network device to stop performing periodic switching on the SSB beams.

[0019] In an embodiment of the present disclosure, if a 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 simultaneously, it is determined that the first condition is satisfied.

[0021] In one embodiment of the present disclosure, the first configuration information includes: the codebook level negatively correlated with the SSB beam increases based on a first variable, so that the number of SSB beams forwarded by the first network device RIS decreases based on a specified manner, where the first variable is a positive integer, the codebook level includes N + 1 configurable levels, the sum of the codebook level before incrementing 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 increment of the codebook level stops.

[0022] In one embodiment of the present disclosure, the second configuration information includes: the codebook level negatively correlated with the SSB beam decreases based on a second variable, so that the number of SSB beams forwarded by the first network device RIS increases based on a specified manner, and the first network device RIS maintains the increased number of SSB beams, where 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, where the value of the current codebook level is less than or equal to the maximum codebook level N; or the codebook level remains unchanged, where 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 a plurality of second sub - conditions, and the plurality of 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 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.

[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 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 the preset percentage value; or M is determined based on the total number of terminals served by the second network device and any one of the preset percentage set.

[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 varies based on different indications 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 varies based on different indications of the second network device.

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

[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 varies based on different indications of the second network device.

[0030] According to another aspect of the present disclosure, there is provided an intelligent metasurface RIS control device, which is applied to a terminal and includes: a sending module, configured to send feedback information to a second network device in response to receiving an SSB beam forwarded by a first network device RIS, where the first network device RIS includes a plurality of 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, there is provided an intelligent metasurface RIS control device, which is applied to a first network device RIS. The first network device RIS includes a plurality of RIS elements and includes: a forwarding module, configured to forward an SSB beam pointed by a second network device to the first network device RIS based on the codebook level carried in the initial control information. Wherein, after each time the SSB beam is forwarded to a terminal within the service range, the second network device determines corresponding configuration information based on the feedback information of the terminal and sends it to the first network device RIS; a switching module, configured to periodically switch the forwarded SSB beam based on the received configuration information.

[0032] According to another aspect of the present disclosure, there is provided an intelligent metasurface RIS control device, which is applied to a second network device and includes: a receiving module, configured to receive feedback information sent by a terminal served by a first network device RIS, where the feedback information is generated based on an SSB beam forwarded by the first network device RIS; a generating module, configured to generate corresponding configuration information based on the feedback information; a sending module, configured 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.

[0033] According to another aspect of the present disclosure, there is provided a terminal, which includes: a processor; and a memory, configured to store executable instructions of the processor; the processor is configured to execute the intelligent metasurface RIS control method in the above first aspect by executing the executable instructions.

[0034] According to another aspect of the present disclosure, there is provided a network device, which includes: a processor; and a memory, configured to store executable instructions of the processor; the processor is configured to execute the intelligent metasurface RIS control method in the above first aspect by executing the executable instructions.

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

[0036] According to another aspect of the present disclosure, there is provided a computer program product having a computer program stored thereon, and 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 realizes the initial SSB beam forwarding by using the codebook level, dynamically generates configuration information in combination with the terminal feedback information, and then periodically switches the forwarding beam. On the one hand, the RIS performs targeted beam adjustment according to the actual terminal feedback, which can reduce unnecessary beam scanning actions, and thus is beneficial to reducing the hardware power consumption of the second network device. On the other hand, compared with the method of sacrificing the user service quality by overly reducing the number of beams, flexibly adjusting the beam resources based on the real-time feedback of the terminal realizes the optimal allocation of beam resources in the dynamic user distribution scenario, and while improving the system coverage performance, it takes into account the requirements of high throughput, low latency and high energy efficiency, and improves the overall performance and user experience of the communication system.

[0038] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Brief Description of the Drawings

[0039] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0040] Figure 1 A schematic diagram showing an intelligent metasurface RIS control system in an embodiment of the present disclosure; Figure 2 A flowchart showing an intelligent metasurface RIS control method in an embodiment of the present disclosure; Figure 3 A flowchart showing another intelligent metasurface RIS control method in an embodiment of the present disclosure; Figure 4 A schematic diagram showing the correspondence between a codebook level and the number of beams in an embodiment of the present disclosure; Figure 5 A flowchart showing yet another intelligent metasurface RIS control method in an embodiment of the present disclosure; Figure 6 A schematic diagram showing another intelligent metasurface RIS control system in an embodiment of the present disclosure; Figure 7Shows a flowchart of yet another intelligent metasurface RIS control method in an embodiment of the present disclosure; Figure 8 Shows a schematic diagram of an intelligent metasurface RIS control device in an embodiment of the present disclosure; Figure 9 Shows a schematic diagram of another intelligent metasurface RIS control device in an embodiment of the present disclosure; Figure 10 Shows a schematic diagram of yet another intelligent metasurface RIS control device in an embodiment of the present disclosure; Figure 11 Shows a structural block diagram of a computer device in an embodiment of the present disclosure. Detailed implementation manners

[0041] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various 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 more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0042] In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repeated description will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0043] As wireless communication develops towards high frequency bands, such as millimeter wave and terahertz networks, signal coverage and transmission quality face severe challenges. Reconfigurable Intelligent Surface (RIS), as an emerging technology, has become a key means to enhance network coverage and improve energy efficiency by dynamically regulating the electromagnetic wave propagation environment.

[0044] In the actual deployment of RIS, the base station usually cannot independently obtain the separate channel state information (CSI) of the BS-RIS link and the RIS-UE link. It can only estimate by measuring the CSI of the cascaded channel (i.e., the overall BS-RIS-UE link). The complexity of this cascaded channel makes the joint optimization of precoding on the base station side and beamforming on the RIS side face significant challenges. Therefore, a feasible solution is to control the forwarding beam of RIS through beam indices. However, neither the base station nor the RIS itself knows what kind of forwarding beam the current network needs. Therefore, its overall management depends on the operation and maintenance management (OAM) system. Therefore, the physical characteristics of the beam used by RIS to forward signals (such as beam direction, beam width, etc.) can be provided by the OAM to the base station and the RIS.

[0045] After the base station obtains the beam information of the RIS, the association relationship between the RIS beam and the SSB (synchronization signal block) / CSI-RS (channel state information reference signal) beam can be established. To clarify this mechanism, Figure 1 shows an example of the mapping between the RIS beam and the SSB beam. In the NR system, the base station periodically sends SSB broadcast system information with a specific beam for the UE to access the network. The UE detects the SSB and selects one of them. If the reception is successful, it sends a preamble through the PRACH (physical random access channel) opportunity associated with the selected SSB index. Since there is a fixed relationship between the PRACH opportunity position and the SSB index, the base station can infer the beam selected by the UE by detecting the preamble on a specific PRACH opportunity.

[0046] As Figure 1 an example, an SSB burst contains 8 SSBs. Among them, the SSBs with indices #1 to #4 cover the proximal area, while the SSBs with indices #5 to #8 all point to the RIS to cover the occluded area. The SSB uses time-division multiplexing transmission. Therefore, a one-to-one mapping between the SSB beam and the RIS beam can be achieved (such as {#5, #a}, {#6, #b}, etc.). The base station only needs to configure the beam information to the RIS in advance to control its beam switching.

[0047] However, if high coverage performance is pursued, a large number of beam scans need to be maintained, resulting in high hardware power consumption. And reducing the number of beams excessively can reduce the power consumption, but it may sacrifice the user service quality. Especially in the scenario of dynamic user distribution, if the optimal allocation of beam resources cannot be achieved, the requirements of high throughput, low latency, and high energy efficiency cannot be satisfied simultaneously.

[0048] For the convenience of understanding, several terms involved in this application are first explained below.

[0049] RSRP (Reference Signal Received Power): It refers to the linear average of the signal power received by the terminal device on a specific reference signal resource. In the 5G NR system, the reference signal (RS) is a known signal sent by the base station and is used for various functions such as channel estimation, synchronization, and power control. The terminal device evaluates the current wireless channel quality and signal strength by measuring the received power of the reference signal.

[0050] 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-domain and frequency-domain synchronization.

[0051] The RIS beam is sent by the RIS (Reconfigurable Intelligent Surface). The RIS consists of a large number of small passive reflection elements, which do not actively generate signals themselves. Its working principle is as follows: The signal sent by a transmitting end such as a base station (such as an SSB beam) is incident on the RIS. The RIS, according to a pre-set algorithm and the received control information, reflects and regulates the incident signal by adjusting the electromagnetic characteristics such as the phase and amplitude of each reflection element, and reflects the signal in a specific direction with a specific gain, thereby forming an RIS beam with specific physical characteristics (such as beam direction, beam width, etc.) to optimize the signal propagation path.

[0052] Among them, those skilled in the art can understand that the initial control information and configuration information in the following embodiments both belong to the category of control information.

[0053] A codebook, in the field of wireless communication, refers to a set of pre-defined vectors or matrix collections that can be used for quantization representation of beamforming vectors, etc.

[0054] Next, each step of the intelligent metasurface RIS control method in this exemplary embodiment will be described in more detail in conjunction with the drawings and embodiments.

[0055] Among them, in the specific implementation manner of the present disclosure, the first network device, the RIS, and the first network device RIS all represent intelligent metasurfaces for wireless communication enhancement, and their only difference lies in the expression method.

[0056] Figure 2 Shows a flowchart of an intelligent metasurface RIS control method in an embodiment of the present disclosure.

[0057] As Figure 2 shown, an intelligent metasurface RIS control method according to an embodiment of the present disclosure, applied to a terminal, includes: Step S202: In response to the SSB beam forwarded by the first network device, determine to be served by the RIS, and send feedback information 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 distributes the configuration information to the first network device, so that the first network device performs periodic switching of the SSB beam based on the configuration information.

[0058] In some embodiments, the first network device is a RIS, and the second network device is a base station. In a scenario involving a 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, and then points to the target area or UE. In this case, it can be regarded that the base station indirectly performs beam scanning-related operations on the target area or UE through the RIS.

[0059] In this embodiment, when the terminal receives the SSB beam forwarded by the first network device, that is, the RIS beam, it can identify 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 where the terminal is located and the signal reception situation, and then generate corresponding configuration information and distribute it to the first network device. The first network device performs periodic switching of the SSB beam according to the configuration information. Through the intelligent control of the terminal feedback and the second network device, the beam switching is carried out according to actual needs, preventing a large number of beam scans without pertinence, effectively reducing the hardware power consumption. In a dynamic user distribution scenario, the beam resources can also be reasonably allocated, and then the optimization of the requirements of high throughput, low latency and high energy efficiency can be achieved simultaneously, improving the comprehensive performance of the communication system in complex scenarios.

[0060] In an embodiment of the present disclosure, the feedback information includes the reference signal received power RSRP.

[0061] In some embodiments, the feedback information can also be the reference signal received quality RSRQ, the signal-to-interference-plus-noise ratio or the channel state information CSI, etc.

[0062] In this embodiment, by the terminal sending feedback information including RSRP to the second network device, and the second network device generating configuration information based on this feedback information and distributing it, the first network device can perform periodic switching of the SSB beam according to the actual terminal signal reception situation, preventing unnecessary beam scans, thereby reducing the hardware power consumption. And regulating the beam based on the RSRP fed back by the terminal can flexibly adjust the beam resources according to the dynamic scenario where the user is located, improving the user service quality, reducing the latency while ensuring high throughput, and thus achieving high energy efficiency communication optimization.

[0063] Such as Figure 3As shown, an intelligent metasurface RIS control method according to another embodiment of the present disclosure is applied to a first network device. The first network device includes a plurality of RIS elements, and includes: Step S302: Forward the SSB beam pointed from the second network device to the first network device based on the codebook level carried in the initial control information. After each time the 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 issues it to the first network device.

[0064] In some embodiments, after the system is started, the RIS obtains initial control information, which includes a codebook level.

[0065] In some embodiments, the initial control information can be indicated by the second network device or predefined.

[0066] In some embodiments, the RIS receives the SSB beam transmitted from the second network device. This beam carries broadcast system information for terminal access to the network. The RIS performs a forwarding operation on the beam based on the codebook level carried in the initial control information. The codebook level determines characteristics such as the number of RIS-forwarded beams and the spatial direction, thereby forwarding the SSB beam to terminals within its service range.

[0067] Step S304: Periodically switch the forwarded SSB beam based on the configuration information.

[0068] In some embodiments, the configuration information can be indicated by the second network device or predefined.

[0069] In some embodiments, the RIS can periodically receive the configuration information to perform a switching operation on the forwarded SSB beam based on the configuration information. The switching content mainly includes adjusting the spatial direction and number of the forwarded SSB beams.

[0070] In this embodiment, by using the codebook level to implement the initial SSB beam forwarding and combining the terminal feedback information to dynamically generate the configuration information, and then periodically switching the forwarded beam. On the one hand, the RIS performs targeted beam adjustment according to the actual terminal feedback, which can reduce unnecessary beam scanning actions, and thus is beneficial to reducing the hardware power consumption of the second network device. On the other hand, compared with the method of sacrificing the user service quality by overly reducing the number of beams, flexibly adjusting the beam resources based on the real-time feedback of the terminal realizes the optimal allocation of beam resources in the dynamic user distribution scenario, while improving the system coverage performance, taking into account the requirements of high throughput, low latency and high energy efficiency, and improving the overall performance and user experience of the communication system.

[0071] In one embodiment of the present disclosure, the codebook level characterizes the number of SSB beams supported by the RIS for forwarding and the spatial direction of each forwarded SSB beam; the initial control information further includes the weight value corresponding to each RIS element, and the weight value characterizes the weight of each RIS element in the RIS, and the weight represents the amplitude and / or phase of each RIS element for forwarding each SSB beam. Among them, the number of forwarded SSB beams is determined based on the codebook level, and the spatial direction of each forwarded SSB beam is determined based on the codebook level, amplitude, and / or phase.

[0072] In some embodiments, the RIS determines the codebook level and the weight value according to the configuration on the second network device side. The codebook level can characterize the number of spatial directions of the SSB beams supported by the RIS for forwarding and the spatial direction of each forwarded SSB beam. The weight value characterizes the weight of each RIS element and the spatial direction of each forwarded SSB beam, and the weight is used to characterize the amplitude and / or phase of the beam.

[0073] In some embodiments, the codebook level is the key starting parameter of the entire mechanism. First, the number of SSB beams supported by the RIS for forwarding is determined according to the codebook level. The codebook level works together with the weight value corresponding to each RIS element to determine the beam spatial direction. The weight value of each RIS element can play a role by adjusting the amplitude and / or phase. Since different combinations of amplitude and phase will have different modulation effects on the signal, when these modulation effects determined by the weight value act on different SSB beams, combined with the general spatial direction framework preset by the codebook level, the final pointing of each forwarded SSB beam in space is determined.

[0074] In this embodiment, determining the number and spatial direction of the forwarded SSB beams by combining the codebook level with the weight value is beneficial to ensuring the reasonable allocation of beam resources in different scenarios, and using the regulation of the amplitude and phase by the codebook level and the weight value to determine the beam spatial direction is also beneficial to improving the accuracy of signal coverage, so that in an occluded area, a complex environment or a dynamic user distribution scenario, the beam can be directed to the target area or user as much as possible.

[0075] In one embodiment of the present disclosure, forwarding the SSB beam from the second network device to the first network device includes: periodically forwarding the SSB beam to the terminal based on the time division multiplexing mechanism.

[0076] In this embodiment, a periodic timing arrangement for forwarding the SSB beam to the terminal is formulated based on time division multiplexing. The RIS will forward the corresponding SSB beam to the terminal according to the preset corresponding relationship, realizing the periodic timing forwarding based on the time division multiplexing mechanism, which can ensure that each SSB beam can reach the terminal according to a certain rule and order, and prevent conflicts and interference between the beams.

[0077] In one embodiment of the present disclosure, the codebook level includes N+1 configurable levels, where N is a positive integer. Periodically switching the SSB beams based on the configuration information sent by the second network device includes: during the periodic switching, if the first configuration information is received, increasing the codebook level based on the first configuration information, and reducing the number of the corresponding forwarded SSB beams in a specified manner.

[0078] In some embodiments, the set of codebook levels is {0, 1,..., N}, including a total of N+1 configurable levels. When the codebook level increases, the number of forwarded SSB beams supported by the RIS decreases sequentially in a specified manner, where the specified manner is a predefined manner or a manner indicated by the network side.

[0079] In some embodiments, the codebook level is negatively correlated with the number of forwarded SSB beams.

[0080] In this embodiment, due to the configurability of the codebook level and the dynamic adjustment of the beam number according to the codebook level, in areas where the user distribution is relatively concentrated and the environmental interference is relatively easy to control, by increasing the codebook level and reducing the beam number, it is possible to achieve the resource utilization of key areas, concentrate the energy on key areas, improve the communication quality and data transmission rate of users in key areas, and improve the spectrum efficiency of the system in these areas.

[0081] In one embodiment of the present disclosure, the codebook level includes N+1 configurable levels, where N is a positive integer. Periodically switching the SSB beams based on the configuration information sent by the second network device includes: during the periodic switching, if the second configuration information is received, reducing the codebook level based on the second configuration information, increasing the number of the corresponding forwarded SSB beams in a specified manner, and stopping the switching after the increase to maintain the increased number of SSB beams.

[0082] In some embodiments, the codebook level determines the accuracy and flexibility of beamforming. A higher codebook level means finer beam control, but it also occupies more resources. Therefore, when the codebook level is increased under limited resources, it is necessary to reduce the number of forwarded SSB beams in a specified manner to maintain the balance of system resources. If it is increased to a certain extent, it is necessary to reduce the codebook level to increase the number of forwarded SSB beams. After the number of SSB beams is increased, the switching can be stopped to prevent the repeated increase and decrease of the codebook level, resulting in resource waste.

[0083] In this embodiment, the configuration of RIS is flexibly adjusted according to the actual number of terminals and the signal quality of the terminals. When the first condition is met, increasing the codebook level can more accurately point the beam to the area where users are concentrated and the signal quality is good. Although the number of SSB beams is reduced, the spectrum efficiency and the accuracy of data transmission are improved, which is suitable for scenarios with high requirements for data transmission rate. When the first condition is not met, reducing the codebook level and increasing the number of SSB beams can expand the signal coverage and enhance the signal strength, which is especially suitable for areas where users are more dispersed or the signal quality is poor, ensuring the basic communication needs of users in these areas. At the same time, stopping switching to maintain the increased number of SSB beams can enable the terminal to obtain a stable signal, reduce signal fluctuations and interruptions, improve the user's communication experience, and enable the communication system to achieve performance optimization and balance in different network environments.

[0084] In some embodiments, the relationship between the level and the number of beams is as follows: Figure 4 As shown in Figure 1, 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 .

[0085] In some embodiments, when 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 the codebook level and the number of beams follows: when n∈{0,1,...,N-1}, the number of effective beams corresponding to the nth level codebook is a(Nn); when n=N, the number of effective beams corresponding to the Nth level codebook is 1.

[0086] In one embodiment of the present disclosure, it also includes: if the 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.

[0087] In this embodiment, when achieving the requirements of high throughput, low latency and high energy efficiency, if 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.

[0088] In one embodiment of the present disclosure, the designated method is a decreasing method predefined by the second network device, or a decreasing method indicated by the second network device.

[0089] In one embodiment of the present disclosure, forwarding the SSB beam of the second network device pointing to the first network device based on the codebook level carried in the initial control information includes: the initial control information carries the minimum codebook level, determining the maximum number of corresponding forwarded SSB beams based on the minimum codebook level, and forwarding the SSB beams based on the maximum number.

[0090] 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 performs periodic dynamic switching on the forwarded SSB beams.

[0091] As Figure 5 shown, the intelligent metasurface RIS control method according to another embodiment of the present disclosure, which is applied to the second network device, includes: 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.

[0092] Step S504, generating corresponding configuration information based on the feedback information.

[0093] In some embodiments, after receiving the feedback information sent by the terminal, the base station performs detailed parsing and processing on it. The processing module inside the base station will analyze the data in the feedback information according to the preset algorithms and strategies. For example, if the feedback information shows that the RSRP received by the terminal is low, indicating insufficient signal strength, the base station may determine that the current SSB beam configuration needs to be adjusted to enhance signal coverage.

[0094] In some embodiments, according to the analysis result, the base station generates corresponding configuration information, and these configuration information 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 requirements of the terminal.

[0095] Step S506, sending the configuration information to the first network device, so that the first network device performs periodic switching on the SSB beams based on the configuration information.

[0096] In this embodiment, the terminal generates feedback information based on the SSB beam, enabling the base station to accurately obtain the actual signal reception situation of the terminal. Subsequently, the base station can generate configuration information in a targeted manner to prevent blind beam scanning and resource allocation, reducing the hardware power consumption. The first network device performs periodic switching of the SSB beam according to the configuration information, enabling the signal coverage to be dynamically adjusted according to the terminal's requirements. In a dynamic user distribution scenario, optimized allocation of beam resources is achieved. The terminal can receive stronger and more stable signals, improving the signal quality and meeting the communication requirements of high throughput and low latency, comprehensively enhancing the overall performance and user experience of the communication system in complex environments.

[0097] 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 RSRP of the terminals within the RIS service range based on the feedback information; generating corresponding configuration information based on the number of terminals and the RSRP of the terminals.

[0098] In some embodiments, the RSRP of the terminal can 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, etc.

[0099] In this embodiment, 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, precise beam adjustment can be achieved.

[0100] In one embodiment of the present disclosure, generating 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, generating second configuration information, where the first configuration information is suitable for enabling the first network device to continue performing periodic switching of the SSB beam, and the second configuration information is suitable for enabling the first network device to stop performing periodic switching of the SSB beam.

[0101] In some embodiments, the second network device determines the number of terminals within the RIS service range and the RSRP per user within the RIS service range according to the feedback information of the UE. The second network device generates first configuration information if the first condition is met, otherwise, the second network device generates second configuration information.

[0102] In this embodiment, when the detection result meets the first condition, it indicates that the network operating state is good. At this time, the generated first configuration information allows the terminal to continue sending feedback information, which helps the system continuously track the dynamic changes of the network and maintain accurate monitoring of the network state. If the first condition is not met, it means that there may be abnormal situations such as poor signal, overly dense or sparse users in the network. After the generated second configuration information reconfigures the number of SSB beams or maintains the number of SSB beams, the first network device stops the periodic switching of the SSB beams. At this time, continuing to collect feedback information may not effectively improve the network condition, but instead increase the network burden. Stopping the feedback helps the system concentrate resources on dealing with the current network problems, such as adjusting beam configuration, optimizing resource allocation, etc.

[0103] In an embodiment of the present disclosure, the first configuration information includes: the codebook level increases based on a first variable, so that the number of forwarded SSB beams corresponding to the first network device decreases based on a specified manner, where the first variable is a positive integer, the codebook level includes N + 1 configurable levels, the sum of the codebook level before increment and the first variable is less than or equal to the maximum codebook level. If the codebook level increases to the maximum codebook level N, the increment of the codebook level stops.

[0104] In some embodiments, the first configuration information includes that the value of the beam level configured on the network side increases by y (y is a positive integer, y is greater than or equal to 0, and the sum of the current beam level and y needs to be less than or equal to N).

[0105] In an embodiment of the present disclosure, the second configuration information includes: the codebook level decreases based on a second variable, so that the number of forwarded SSB beams corresponding to the first network device increases based on a specified manner, and stops switching after the increase to maintain the increased number of SSB beams, where 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, where the value of the current codebook level is less than or equal to the maximum codebook level N; or the codebook level remains unchanged, where the value of the current codebook level is less than the maximum codebook level N.

[0106] In some embodiments, the second configuration information involves adjusting the codebook level according to the second variable. The second variable is a positive integer and satisfies 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 decreasing the codebook level based on the second variable, the number of forwarded SSB beams corresponding to the first network device can increase according to a specified manner. After the number of SSB beams increases, stop switching to maintain the increased number, so that the state of the number of SSB beams can be stably maintained, without making the number of beams too large or causing too large RSRP, resulting in resource waste.

[0107] 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 SSB beam quantity can already meet the performance requirements of the system and no adjustment is needed, or due to other factors such as system stability and resource allocation, it is more appropriate to maintain the existing configuration.

[0108] In some embodiments, the second configuration information includes: The network side configures the value of the codebook level to decrease by z (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).

[0109] Or it is characterized in that the network side configures the value of the codebook level to decrease by z (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).

[0110] Or the network side configures the codebook level value to remain unchanged.

[0111] In an embodiment of the present disclosure, if the second condition is satisfied, it is determined that the first condition is satisfied.

[0112] In an 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: 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.

[0113] In an 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.

[0114] In some embodiments, M is a parameter configured by the network side, and M is the floor or ceiling of |{20%, 30%, 50%, xx%} The total number of UEs served by the RIS|.

[0115] Or the default value of M is the floor or ceiling of 20%, or 30%, or 50%, or xx% of the total number of UEs served by the RIS.

[0116] Or M is a parameter configured by the network side, and M is |{20%, 30%, 50%, xx%} It is the floor or ceiling of the total number of UEs served by the network side.

[0117] Or the default value of M is a parameter configured by the network side, and M is |{20%, 30%, 50%, xx%} It is the floor or ceiling of the total number of UEs served by the network side.

[0118] In an 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, where the first threshold is a fixed value, or the first threshold varies based on different indications of the second network device.

[0119] In an 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, where the second threshold is a fixed value, or the second threshold varies based on different indications of the second network device.

[0120] In Embodiment 1, as Figure 6 shown, there is one base station BS, one RIS, and K users in the system. The user IDs are UE#1, UE#2,..., UE#8 respectively. The maximum number of beams that the RIS can support is 16. During the initialization process, the RIS confirms the current codebook level as level 0, the number of SSB forwarding beams as 16, and the weight of each unit to confirm the 16 SSB beam directions according to the codebook information in the control information sent by the base station. The RIS uses a time-division multiplexing transmission method to forward the SSB beam from 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 according to the SSB_index fed back by the UE. The first threshold is configured by the base station side as -85 dB, the second threshold is configured by the base station side as 3 dB, and the base station confirms that the RSRPs fed back by UE#1 to UE#4 are -80 dB, -79 dB, -78 dB, and -81 dB respectively.

[0121] In the following embodiments, UERIS refers to the UE served by the RIS.

[0122] In Embodiment 1, within one period, the differences between the RSRP of all 4 UERIs and the first threshold are 5 dB, 6 dB, 7 dB, and 4 dB respectively, all of which are greater than the second threshold, meeting the condition that the differences between the RSRP of all UERIs' feedback and the first threshold are greater than the second threshold. The RIS confirms that the codebook level is level 1, the number of SSB forwarding beams is 8, and the weight per unit to confirm the directions of 8 SSB beams according to the configuration information sent by the base station.

[0123] In Embodiment 1, within the next period, the base station confirms that the RSRP feedback by UE#1 to UE#4 are -86 dB, -80 dB, -79 dB, and -85 dB respectively according to the current system configuration. The differences between the RSRP of all 4 UERIs and the first threshold are -1 dB, 5 dB, 6 dB, and 0 dB respectively, not meeting the condition that the differences between the RSRP of all UERIs' feedback and the first threshold are greater than the second threshold. The RIS maintains the current codebook level.

[0124] In Embodiment 2, there is one base station, one RIS, and 8 users in the system. The user IDs are UE#1, UE#2, …, UE#8 respectively, and the maximum number of beams supported by the RIS is 4.

[0125] In Embodiment 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 per unit to confirm the directions of 4 SSB beams according to 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 from the base station to the RIS. After beam scanning, the base station confirms that UE#1 and UE#2 are served by the RIS according to the SSB_index feedback by the UE. The first threshold is configured by the base station side as -85 dB, and the second threshold is configured by the base station side as 5 dB. The base station confirms that the RSRP feedback by UE#1 to UE#2 are -80 dB and -79 dB respectively.

[0126] In Embodiment 2, within one period, the differences between the RSRP of UE#1 and UE#2 and the first threshold are 5 dB and 6 dB respectively, meeting the condition that the difference between the RSRP of at least one UERI's feedback and the first threshold is greater than or equal to the second threshold. The RIS confirms that the codebook level is level 1, the number of SSB forwarding beams is 2, and the weight per unit to confirm the directions of these 2 SSB beams according to the configuration information sent by the base station.

[0127] In Embodiment 2, in the next cycle, the base station, according to the current system configuration, confirms that the RSRP values reported by UE#1 and UE#2 are -81 dB and -80 dB respectively. The differences between the RSRP values of UE#1 and UE#2 and the first threshold are 4 dB and 5 dB respectively, meeting the condition that the difference between the RSRP value reported by at least one UE RIS and the first threshold is greater than or equal to the second threshold. The RIS, according to the configuration information sent by the base station, confirms that the codebook level is level 2, the number of SSB forwarding beams is 1, and the weight per unit to confirm the SSB beam direction.

[0128] In Embodiment 2, in the next cycle, the base station, according to the current system configuration, confirms that the RSRP values reported by UE#1 and UE#2 are -82 dB and -80 dB respectively. The differences between the RSRP values of UE#1 and UE#2 and the first threshold are 3 dB and 5 dB respectively, meeting the condition that the difference between the RSRP value 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, stops incrementing the codebook level, and maintains the current configuration.

[0129] In Embodiment 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, and the maximum number of beams supported by the RIS is 16.

[0130] In Embodiment 3, during the initialization process, the RIS, according to the codebook information in the initial control information sent by the base station, confirms that the current codebook level is level 0, the number of SSB forwarding beams is 16, and the weight per unit to confirm 16 SSB beam directions. The RIS uses a time-division multiplexing transmission method to forward the SSB beam from the base station to the RIS. After beam scanning, the base station, according to the SSB_index reported by the UE, confirms that UE#1, UE#2, UE#3, and UE#4 are served by the RIS. The first threshold is configured by the base station side as -85 dB, and the second threshold is configured by the base station side as 3 dB. The base station confirms that the RSRP values reported by UE#1 to UE#4 are -80 dB, -79 dB, -78 dB, and -81 dB respectively.

[0131] In Embodiment 3, in one cycle, the differences between the RSRP values of all 4 UE RIs and the first threshold are 5 dB, 6 dB, 7 dB, and 4 dB respectively, all of which are greater than the second threshold, meeting the condition that the differences between the RSRP values reported by at least 2 UE RIs and the first threshold are both greater than or equal to the second threshold. The RIS, according to the configuration information sent by the base station, confirms that the codebook level is level 1, the number of SSB forwarding beams is 8, and the weight per unit to confirm 8 SSB beam directions.

[0132] In Embodiment 3, in the next cycle, the base station, according to the current system configuration, confirms that the RSRP values reported by UE#1 to UE#4 are -86 dB, -80 dB, -79 dB, and -85 dB respectively. The differences between the RSRP values of all 4 UE RIs and the first threshold are -1 dB, 5 dB, 6 dB, and 0 dB respectively, meeting the condition that the differences between the RSRP values reported by at least 2 UE RIs and the first threshold are both greater than or equal to the second threshold. The RIS, according to the configuration information sent by the base station, confirms that the codebook level is level 2, the number of SSB forwarding beams is 4, and the weight per unit to confirm the directions of 4 SSB beams.

[0133] In Embodiment 3, in the next cycle, the base station, according to the current system configuration, confirms that the RSRP values reported by UE#1 to UE#4 are -88 dB, -84 dB, -81 dB, and -89 dB respectively. The differences between the RSRP values of all 4 UE RIs and the first threshold are -3 dB, 1 dB, 4 dB, and -4 dB respectively, not meeting the condition that the differences between the RSRP values reported by at least 2 UE RIs and the first threshold are both greater than or equal to the second threshold. The RIS maintains the current codebook level.

[0134] In Embodiment 4, there is one base station, one RIS, and 8 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.

[0135] During the initialization process, the RIS, according to the codebook information in the initial control information sent by the base station, confirms that the current codebook level is level 0, the number of SSB forwarding beams is 16, and the weight per unit to confirm the directions of 16 SSB beams. The RIS uses time-division multiplexing transmission mode to forward the SSB beam from the base station to the RIS. After beam scanning, the base station, according to the SSB_index reported by the UE, confirms that UE#1, UE#2, UE#3, and UE#4 are served by the RIS. The first threshold is configured by the base station side as -85 dB, and the second threshold is configured by the base station side as 3 dB. The base station confirms that the RSRP values reported by UE#1 to UE#4 are -80 dB, -79 dB, -78 dB, and -81 dB respectively.

[0136] In Embodiment 4, in one cycle, the differences between the RSRP values of all 4 UE RIs and the first threshold are 5 dB, 6 dB, 7 dB, and 4 dB respectively, all of which are greater than the second threshold, meeting the condition that the differences between the RSRP values reported by at least 2 UE RIs and the first threshold are both greater than or equal to the second threshold. The RIS, according to the configuration information sent by the base station, confirms that the codebook level is level 1, the number of SSB forwarding beams is 8, and the weight per unit to confirm the directions of 8 SSB beams.

[0137] In Embodiment 4, in the next cycle, the base station, according to the current system configuration, confirms that the RSRP values reported back by UE#1 to UE#4 are -88 dB, -84 dB, -81 dB, and -89 dB respectively. The differences between the RSRP values of all 4 UE RIs and the first threshold are -3 dB, 1 dB, 4 dB, and -4 dB respectively, which do not meet the condition that the differences between the RSRP values reported back by at least 2 UE RIs and the first threshold are both greater than or equal to the second threshold. The RIS maintains the current codebook level.

[0138] In Embodiment 5, there is one base station, one RIS, and 8 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.

[0139] During the initialization process, the RIS, according to the codebook information in the initial control information sent by the base station, confirms that the current codebook level is level 0, the number of SSB forwarding beams is 16, and the weight per unit is used to confirm 16 SSB beam directions. The RIS uses a time-division multiplexing transmission method to forward the SSB beam from the base station to the RIS. After beam scanning, the base station, according to the SSB_index reported back by the UE, confirms that UE#1, UE#2, UE#3, and UE#4 are served by the RIS. The first threshold is configured by the base station side as -85 dB, and the second threshold is configured by the base station side as 3 dB. The base station confirms that the RSRP values reported back by UE#1 to UE#4 are -80 dB, -79 dB, -78 dB, and -81 dB respectively.

[0140] In Embodiment 5, in one cycle, the differences between the RSRP values of all 4 UE RIs and the first threshold are 5 dB, 6 dB, 7 dB, and 4 dB respectively, all of which are greater than the second threshold, meeting the condition that the differences between the RSRP values reported back by at least 2 UE RIs and the first threshold are both greater than or equal to the second threshold. The RIS, according to the control information sent by the base station, confirms that the codebook level is level 1, the number of SSB forwarding beams is 8, and the weight per unit is used to confirm 8 SSB beam directions.

[0141] In Embodiment 5, in the next cycle, the base station, according to the current system configuration, confirms that the RSRP values reported back by UE#1 to UE#4 are -86 dB, -80 dB, -79 dB, and -85 dB respectively. The differences between the RSRP values of all 4 UE RIs and the first threshold are -1 dB, 5 dB, 6 dB, and 0 dB respectively, meeting the condition that the differences between the RSRP values reported back by at least 2 UE RIs and the first threshold are both greater than or equal to the second threshold. The RIS, according to the control information sent by the base station, confirms that the codebook level is level 2, the number of SSB forwarding beams is 4, and the weight per unit is used to confirm 4 SSB beam directions.

[0142] In Embodiment 5, in the next cycle, the base station, according to the current system configuration, confirms that the RSRP values reported back by UE#1 to UE#4 are -88 dB, -84 dB, -81 dB, and -89 dB respectively. The differences between the RSRP values of all 4 UE RIs and the first threshold are -3 dB, 1 dB, 4 dB, and -4 dB respectively, not meeting the condition that the differences between the RSRP values reported back by at least 2 UE RIs and the first threshold are both greater than or equal to the second threshold. The RIS reverts to the previous-level codebook Level.

[0143] In an embodiment of the present disclosure, if the second condition and the third condition are both satisfied, it is determined that the first condition is satisfied.

[0144] In an 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: The differences between the RSRP values of all terminals served by the RIS and the first threshold are all less than the third threshold; the difference between the RSRP value of at least one terminal served by the RIS and the first threshold is less than the third threshold; the differences between the RSRP values of at least Q terminals served by the RIS and the first threshold are less than the third threshold, where Q is a positive integer.

[0145] Among them, the third threshold is greater than the second threshold.

[0146] In some embodiments, the implementation manners of simultaneously satisfying the second condition and the third condition include, but are not limited to: The differences between the RSRP values of all terminals served by the RIS and the first threshold are all greater than or equal to the second threshold and less than the third threshold.

[0147] The difference between the RSRP value 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 the third threshold.

[0148] The differences between the RSRP values of at least Q terminals served by the RIS and the first threshold are greater than or equal to the second threshold and less than the third threshold, where Q is a positive integer.

[0149] In an 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 in 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 in a preset percentage set.

[0150] In some embodiments, Q is a parameter configured by the network side, and Q is |{20%, 30%, 50%, xx%} Floor or ceiling of the total number of UEs served by the RIS.

[0151] Or the Q default value is the floor or ceiling of 20%, or 30%, or 50%, or xx% of the total number of UEs served by the RIS.

[0152] Or Q is a parameter configured by the network side, and M is {20%, 30%, 50%, xx%} Floor or ceiling of the total number of UEs served by the network side.

[0153] Or the Q default value is a parameter configured by the network side, and M is {20%, 30%, 50%, xx%} Floor or ceiling of the total number of UEs served by the network side.

[0154] In one embodiment of the present disclosure, the third threshold is a threshold value predefined for 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 varies based on different indications of the second network device.

[0155] As Figure 7 shown, an intelligent metasurface RIS control method according to another embodiment of the present disclosure includes: Step S702, the RIS performs initialization processing according to the control information configured by the network side, and confirms that the current codebook level is 0, the number of beams, and the element weights.

[0156] Step S704, the second network device confirms the terminals served by the RIS according to the information fed back by the UEs.

[0157] Step S706, the second network device confirms the RSRP of the terminals served by the RIS.

[0158] Step S708, detect whether the RSRP meets the first condition. If "yes", go to step S710; if "no", go to step S712.

[0159] Step S710, the RIS confirms the value of the codebook level and the weights of the RIS elements according to the first configuration information of the second network device. The codebook level increases by y, and the number of supported forwarded SSB beams decreases.

[0160] Step S712, the RIS confirms the codebook level value and the RIS element weights according to the second configuration information of the second network device. The codebook level value decreases by z, and the number of supported forwarded SSB beams increases, or the codebook level configured by the second network device remains unchanged.

[0161] In this embodiment, It should be noted that the above-mentioned drawings are only schematic illustrations of the processes included in the method according to the exemplary embodiments of the present invention, rather than for limiting purposes. It is easy to understand that the processes shown in the above-mentioned drawings do not indicate or limit the chronological order of these processes. Additionally, it is also easy to understand that these processes can be executed synchronously or asynchronously in, for example, multiple modules.

[0162] The following will refer to Figure 8 to describe the intelligent metasurface RIS control device 800 according to an embodiment of the present invention. Figure 8 The shown intelligent metasurface RIS control device 800 is merely an example and should not impose any limitation on the functions and the scope of use of the embodiments of the present invention.

[0163] The intelligent metasurface RIS control device 800 is presented in the form of a hardware module. The components of the intelligent metasurface RIS control device 800 may include but are not limited to: a sending module 802, configured to determine to be served by the RIS in response to the SSB beam forwarded by the received first network device, and send feedback information to the second network device, where the first network device includes a plurality of RIS elements, so that the second network device generates corresponding configuration information based on the feedback information and issues the configuration information to the first network device, so that the first network device periodically switches the SSB beam based on the configuration information.

[0164] The following will refer to Figure 9 to describe the intelligent metasurface RIS control device 900 according to an embodiment of the present invention. Figure 9 The shown intelligent metasurface RIS control device 900 is merely an example and should not impose any limitation on the functions and the scope of use of the embodiments of the present invention.

[0165] The intelligent metasurface RIS control device 900 is presented in the form of a hardware module. The components of the intelligent metasurface RIS control device 900 may include but are not limited to: a forwarding module 902, configured to forward the SSB beam pointed by the second network device to the first network device based on the codebook level carried in the initial control information, where after each forwarding of the SSB beam to a terminal within the service range, the second network device determines corresponding configuration information based on the feedback information of the terminal and issues it to the first network device; a switching module 904, configured to periodically switch the forwarded SSB beam based on the configuration information.

[0166] The following will refer to Figure 10 to describe the intelligent metasurface RIS control device 1000 according to an embodiment of the present invention. Figure 10 The shown intelligent metasurface RIS control device 1000 is merely an example and should not impose any limitation on the functions and the scope of use of the embodiments of the present invention.

[0167] The intelligent reconfigurable intelligent surface (RIS) control device 1000 is embodied in the form of a hardware module. The components of the intelligent RIS control device 1000 may include, but are not limited to: a receiving module 1002, configured to receive feedback information sent by a terminal served by the RIS, where the feedback information is generated based on the SSB beams forwarded by a first network device; a generating module 1004, configured to generate corresponding configuration information based on the feedback information; and a sending module 1006, configured to send the configuration information to the first network device, so that the first network device performs periodic switching of the SSB beams based on the configuration information.

[0168] Those skilled in the art can understand that various aspects of the present invention can be implemented as a system, a method, or a program product. Therefore, various aspects of the present invention can be specifically implemented in the following forms, namely: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or an implementation combining hardware and software aspects, which can be collectively referred to as "circuits", "modules", or "systems" here.

[0169] The following refers to Figure 11 to describe the electronic device 1100 according to this embodiment of the present invention. It can be a network device or a terminal. Figure 11 The illustrated electronic device 1100 is only an example and should not impose any limitations on the functions and usage scopes of the embodiments of the present invention.

[0170] As Figure 11 shown, the electronic device 1100 is embodied in the form of a general-purpose computing device. The components of the electronic device 1100 may include, but are not limited to: at least one of the above-mentioned processing units 1110, at least one of the above-mentioned storage units 1120, and a bus 1130 connecting different system components (including the storage unit 1120 and the processing unit 1110).

[0171] Among them, the storage unit stores program code, and the program code can be executed by the processing unit 1110, so that the processing unit 1110 executes 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 execute the solution as Figure 2 described.

[0172] The storage unit 1120 may include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) 11201 and / or a cache storage unit 11202, and may further include a read-only storage unit (ROM) 11203.

[0173] 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 include, but are not limited to: an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment.

[0174] 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 structures.

[0175] The electronic device 1100 may also communicate with one or more external devices 1170 (such as a keyboard, a pointing device, a Bluetooth device, etc.), and may also communicate with one or more devices that enable a user to interact with the electronic device 1100, and / or communicate with any device that enables the electronic device 1100 to communicate with one or more other computing devices (such as a router, a modem, etc.). Such communication may be carried out through the input / output (I / O) interface 1150. Moreover, the electronic device 1100 may also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through the network adapter 1160. As shown in the figure, the network adapter 1160 communicates with other modules of the electronic device 1100 through the bus 1130. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the 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, etc.

[0176] Through the description of the above embodiments, those skilled in the art can easily understand that the example embodiments described herein can be implemented by software, or can be implemented by 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 (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.

[0177] In an exemplary embodiment of the present disclosure, a computer-readable storage medium is further provided, on which a program product capable of implementing the above method of this specification is stored. In some possible implementation manners, various aspects of the present invention can also be implemented in the form of a program product, which includes program code. When the program product runs on an electronic device, the program code is used to cause the electronic device to execute the steps according to various exemplary embodiments of the present invention described in the above "Exemplary Method" section of this specification.

[0178] The program product for implementing the above method according to an embodiment of the present invention can be a portable compact disc read-only memory (CD-ROM) and includes program code, and can 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, the readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0179] The program product can adopt any combination of one or more readable media. The readable media can be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (non-exhaustive list) of the readable storage medium 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 disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0180] The computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, which carries the readable program code. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The readable signal medium can also be any readable medium other than the readable storage medium, which can send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0181] The program code contained on the readable medium can be transmitted by any suitable medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the above.

[0182] The 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++, etc., and also including conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computing device, partially on the user's device, executed as a stand-alone software package, partially on the user's 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's computing device through 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., by using an Internet service provider to connect through the Internet).

[0183] It should be noted that although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more of the above-described modules or units can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0184] In addition, although the steps of the methods in the present disclosure are described in a specific order in the drawings, this does not require or imply that the steps must be performed in that specific order, or that all the steps shown must be performed to achieve the desired result. Additionally or alternatively, some steps can be omitted, multiple steps can be combined into one step for execution, and / or one step can be decomposed into multiple steps for execution, etc.

[0185] From the description of the above embodiments, those skilled in the art can easily understand that the example embodiments described herein can be implemented by software, or by 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 (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to cause a computing device (which can be a personal computer, a server, a mobile terminal, or a network device, etc.) to execute the methods according to the embodiments of the present disclosure.

[0186] Other embodiments of the present disclosure will be readily apparent to those skilled in the art upon consideration of the specification and practice of 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 known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

Claims

1. An intelligent metasurface RIS control method, characterized in that, Applied to a terminal, including: In response to the SSB beam forwarded by the first network device RIS, sending feedback information to the second network device, so that the second network device generates corresponding configuration information based on the feedback information and distributes the configuration information to the first network device RIS, so that the first network device RIS performs periodic switching on the SSB beam based on the configuration information, and the first network device RIS includes multiple RIS elements.

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

3. An intelligent metasurface RIS control method, characterized in that, Applied to the first network device RIS, the first network device RIS includes multiple RIS elements, including: Forwarding the SSB beam pointed by the second network device to the first network device RIS based on the codebook level carried in the initial control information, where after each time the SSB beam is forwarded to the terminal within the service range, the second network device determines the corresponding configuration information based on the feedback information of the terminal and distributes it to the first network device RIS; Performing periodic switching on the forwarded SSB beam based on the received configuration information.

4. The intelligent metasurface RIS control method according to claim 3, characterized in that: The codebook level characterizes the number of SSB beams supported by the first network device RIS for forwarding and the spatial direction of each forwarded SSB beam; The initial control information further includes the weight value corresponding to each RIS element, and the weight value characterizes the weight of each RIS element in the first network device RIS, and the weight represents the amplitude and / or phase of each RIS element for forwarding each SSB beam, wherein, the number of the forwarded SSB beams is determined based on the codebook level, and the spatial direction of each forwarded SSB beam 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 the SSB beam pointed by the second network device to the first network device RIS includes: Periodically timing and forwarding the SSB beam to the terminal based on the time division multiplexing mechanism.

6. The intelligent metasurface RIS control method according to claim 3, wherein, The codebook level includes N + 1 configurable levels, N is a positive integer, and performing periodic switching on 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, increasing the codebook level based on the first configuration information, and the number of the corresponding forwarded SSB beams is decreased based on a specified method.

7. The intelligent metasurface RIS control method according to claim 3, wherein The codebook level includes N + 1 configurable levels, N is a positive integer, and performing periodic switching on 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, decreasing the codebook level based on the second configuration information, and the number of the corresponding forwarded SSB beams is increased based on a specified method, and stopping the switching after the increase to maintain the number of the increased SSB beams.

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

9. The intelligent metasurface RIS control method according to claim 6 or 7, wherein 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 specified 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 the SSB beams pointed by the second network device to the RIS of the first network device based on the codebook level carried in the initial control information includes: The initial control information carries the minimum codebook level, and the maximum number of the forwarded SSB beams is determined based on the minimum codebook level, so as to forward the SSB beams based on the maximum number.

11. An intelligent metasurface RIS control method, characterized in that, Applied to the second network device, it includes: Receiving feedback information sent by a terminal served by the RIS of the first network device, where the feedback information is generated based on the SSB beams forwarded by the RIS of the first network device; Generating corresponding configuration information based on the feedback information; Sending the configuration information to the RIS of the first network device, so that the RIS of the first network device performs periodic switching on the SSB beams based on the configuration information.

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

13. The intelligent metasurface RIS control method according to claim 12, wherein 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 the first condition; If the first condition is met, generating the first configuration information; If the first condition is not met, generating the second configuration information, where the first configuration information is suitable for enabling the RIS of the first network device to continue performing periodic switching on the SSB beams, and the second configuration information is suitable for enabling the RIS of the first network device to stop performing periodic switching on the SSB beams.

14. The intelligent metasurface RIS control method according to claim 13, wherein 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, wherein If the second condition and the third condition are met simultaneously, it is determined that the first condition is met.

16. The intelligent metasurface RIS control method according to claim 13, wherein, The first configuration information includes: The codebook level negatively correlated with the SSB beam increases based on a first variable, so that the number of forwarded SSB beams of the first network device RIS decreases based on a specified manner, where the first variable is a positive integer, the codebook level includes N+1 configurable levels, the sum of the codebook level before increment 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, the increment of the codebook level stops.

17. The intelligent metasurface RIS control method according to claim 13, wherein, The second configuration information includes: The codebook level negatively correlated with the SSB beam decreases based on a second variable, so that the number of forwarded SSB beams of the first network device RIS increases based on a specified manner, and the first network device RIS maintains the increased number of SSB beams, where 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, where the value of the current codebook level is less than or equal to the maximum codebook level; or The codebook level remains unchanged, where 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, and the plurality of second sub-conditions include: The difference between the RSRP of all the terminals served by the first network device RIS and a first threshold is greater than or equal to a second threshold; The 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, and 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 terminals served by the first network device RIS and a preset percentage value; or M is determined based on the total number of terminals served by the first network device RIS and any one in 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 the preset percentage value; or M is determined based on the total number of terminals served by the second network device and any one in the preset percentage set.

20. The intelligent metasurface RIS control method according to claim 18, wherein The first threshold is a predefined threshold value of 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 varies based on different indications 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 varies based on different indications of the second network device.

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

23. The intelligent reconfigurable intelligent surface (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 terminals served by the first network device RIS and a preset percentage value; or Q is determined based on the total number of 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 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 set.

24. The intelligent reconfigurable intelligent surface (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 varies based on different indications of the second network device.

25. An intelligent metasurface RIS control device, characterized in that, When applied to a terminal, it includes: A sending module, configured to, in response to receiving an SSB beam forwarded by a first network device RIS, send feedback information to a 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 performs periodic switching on the SSB beam based on the configuration information, and the first network device RIS includes a plurality of RIS elements.

26. An intelligent metasurface RIS control device, characterized in that, When applied to a first network device RIS, the first network device RIS includes a plurality of RIS elements, and includes: A forwarding module, configured to forward the SSB beam of the second network device pointing to the first network device RIS based on the codebook level carried in the initial control information. After each forwarding of the SSB beam to a terminal within the service range, the second network device determines corresponding configuration information based on the feedback information of the terminal and distributes it to the first network device RIS; A switching module, configured to perform periodic switching on the forwarded SSB beam based on the received configuration information.

27. An intelligent metasurface RIS control device, characterized in that, Applied to a second network device, comprising: A receiving module, configured to receive feedback information sent by a terminal served by a first network device RIS, where the feedback information is generated based on the SSB beam forwarded by the first network device RIS; A generating module, configured to generate corresponding configuration information based on the feedback information; A distributing module, configured to distribute the configuration information to the first network device RIS, so that the first network device RIS performs periodic switching on the SSB beam based on the configuration information.

28. A terminal, characterized in that, Comprising: A processor; And A memory, configured to store 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, Comprising: A processor; And A memory, configured to store executable instructions of the processor; Wherein, the processor is configured to execute the intelligent metasurface RIS control method according to any one of claims 3 to 10 or claims 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, it implements the intelligent metasurface RIS control method according to any one of claims 1 to 24.

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

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