Transmission control method and apparatus, network device, and communication system

Abstract

The application relates to the technical field of communication, and provides a transmission control method and device, a network device and a communication system. The method comprises the following steps: determining a target cell after synchronization signal / physical broadcast channel block (SSB) beam optimization; in the SSB beam period of the target cell, starting an intelligent surface (RIS) device of the target cell, and configuring electromagnetic parameters of the RIS device, wherein the electromagnetic parameters are used for controlling the refractive direction of the SSB beam of the target cell penetrating the RIS device. The method, device, network device and communication system provided by the application control the refractive direction of the SSB beam of the target cell through the RIS device of the target cell, thereby expanding the coverage range of the SSB beam and the overall coverage range of the target cell, and thereby ensuring the coverage performance of users near sidelobes while considering the SSB beam optimization effect.

Description

Technical Field

[0001] This application relates to the field of communication technology, specifically to a transmission control method, apparatus, network equipment, and communication system. Background Technology

[0002] In wireless communication systems, beam optimization adjustment of the Synchronization Signal and Physical Broadcast Channel Block (SSB) is one of the key technologies for improving system performance and user experience.

[0003] Currently, there are two main methods for optimizing SSB beams. One method is to use a narrower SSB beam pointing towards densely populated user areas. The other method is to adjust the SSB beam to shift the azimuth angle of the active antenna unit (AAU) to point towards densely populated user areas. Both methods can improve coverage performance in densely populated user areas; however, due to the narrowing of the SSB beam or the shift in the antenna azimuth angle, the coverage performance of users near the original cell sidelobes corresponding to the SSB beam will decrease.

[0004] Balancing coverage performance in densely populated areas with coverage near the sidelobe of the original cell remains a pressing issue in the field of wireless communication. Summary of the Invention

[0005] This application provides a transmission control method, apparatus, network device, and communication system to solve the technical problem of decreased user coverage performance near the sidelobes of the original cell caused by SSB beam optimization.

[0006] In a first aspect, embodiments of this application provide a transmission control method, including:

[0007] Determine the target cell after SSB beam optimization for the Synchronization Signal / Physical Broadcast Channel Block (SSB).

[0008] During the SSB beam cycle of the target cell, the intelligent metasurface RIS device of the target cell is activated, and the electromagnetic parameters of the RIS device are configured. The electromagnetic parameters are used to control the refraction direction of the SSB beam of the target cell through the RIS device.

[0009] In one embodiment, configuring the electromagnetic parameters of the RIS device includes:

[0010] Based on the type of SSB beam optimization, the target SSB beam to be controlled is determined.

[0011] Configure the electromagnetic parameters of the RIS device based on the target SSB beam.

[0012] In one embodiment, determining the target SSB beam to be controlled based on the type of SSB beam optimization includes:

[0013] When the type of SSB beam optimization includes cell horizontal half-power angle adjustment, the first number of SSB beams and the last number of SSB beams in the SSB beam rotation of the target cell are determined as the target SSB beam.

[0014] In one embodiment, determining the target SSB beam to be controlled based on the type of SSB beam optimization includes:

[0015] When the type of SSB beam optimization includes cell azimuth adjustment, the second number of SSB beams after the SSB beam rotation of the target cell are determined as the target SSB beam.

[0016] In one embodiment, the second quantity is determined based on the difference in cell azimuth angle of the target cell before and after SSB beam optimization.

[0017] In one embodiment, the second quantity is determined based on the difference in the cell azimuth angle of the target cell before and after SSB beam optimization, and the horizontal half-power angle of the SSB beam of the target cell.

[0018] In one embodiment, activating the intelligent metasurface RIS device of the target cell during the SSB beam period of the target cell includes:

[0019] During the transmission time of the target SSB beam within the SSB beam period of the target cell, the intelligent metasurface RIS device of the target cell is activated.

[0020] In one embodiment, configuring the electromagnetic parameters of the RIS device based on the target SSB beam includes:

[0021] Based on the cell parameters of the target SSB beam before and after SSB beam optimization, the electromagnetic parameters of the RIS device are configured.

[0022] In one embodiment, determining the target cell after synchronization signal / physical broadcast channel block (SSB) beam optimization includes:

[0023] Based on the cell parameters of each cell after SSB beam optimization, the target cell is determined from the cells.

[0024] In one embodiment, determining the target cell from the cells based on the cell parameters of each cell after SSB beam optimization includes:

[0025] Based on the cell parameters of each cell after SSB beam optimization, determine at least one of the differences in the cell horizontal half-power angle and the cell azimuth angle before and after SSB beam optimization.

[0026] The target cell is determined from the cells based on at least one of the differences in the horizontal half-power angle and the azimuth angle of each cell before and after SSB beam optimization.

[0027] In one embodiment, determining the target cell from the cells based on at least one of the differences in the horizontal half-power angle and the azimuth angle of each cell before and after SSB beam optimization includes:

[0028] If the difference in the horizontal half-power angle of the cell is greater than a first threshold, or if the difference in the azimuth angle of the cell is greater than a second threshold, the cell is determined to be the target cell.

[0029] In one embodiment, the RIS device is located at the active antenna unit of the target cell.

[0030] Secondly, embodiments of this application provide a transmission control device, comprising:

[0031] The cell determination unit is used to determine the target cell after the synchronization signal / physical broadcast channel block (SSB) beam optimization.

[0032] The RIS control unit is used to activate the intelligent metasurface RIS device of the target cell during the SSB beam period of the target cell, and to configure the electromagnetic parameters of the RIS device, wherein the electromagnetic parameters are used to control the refraction direction of the SSB beam of the target cell through the RIS device.

[0033] Thirdly, embodiments of this application provide a network device, including a memory, a transceiver, and a processor;

[0034] A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0035] Determine the target cell after SSB beam optimization for the Synchronization Signal / Physical Broadcast Channel Block (SSB).

[0036] During the SSB beam cycle of the target cell, the intelligent metasurface RIS device of the target cell is activated, and the electromagnetic parameters of the RIS device are configured. The electromagnetic parameters are used to control the refraction direction of the SSB beam of the target cell through the RIS device.

[0037] Fourthly, embodiments of this application provide a communication system including the network device described in the third aspect, and an intelligent metasurface RIS device disposed at the active antenna unit of each target cell.

[0038] Fifthly, embodiments of this application provide an electronic device, including a processor and a memory storing a computer program, wherein the processor executes the program to implement the steps of the transmission control method described in the first aspect.

[0039] In a sixth aspect, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the steps of the transmission control method described in the first aspect.

[0040] The transmission control method, apparatus, network equipment, and communication system provided in this application control the refraction direction of the SSB beam of the target cell through the RIS device of the target cell, thereby expanding the coverage range of the SSB beam and thus expanding the overall coverage range of the target cell. This ensures the coverage performance of users near the sidelobes while taking into account the optimization effect of the SSB beam.

[0041] Furthermore, in this embodiment of the application, by linking the SSB beam period of the target cell, the RIS device and the SSB beam are controlled to remain synchronized in the time domain, thereby ensuring the overall coverage range and coverage performance of the target cell after SSB beam optimization while ensuring the SSB beam optimization effect. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the configuration of multiple SSB beams in an NR cell in related technologies;

[0044] Figure 2 This is a schematic diagram of an SSB beam before and after SSB beam optimization in a related technology.

[0045] Figure 3 This is a schematic diagram of SSB beam optimization before and after another SSB beam optimization technique in related technologies;

[0046] Figure 4 This is one of the flowcharts illustrating the transmission control method provided in the embodiments of this application;

[0047] Figure 5This is a schematic diagram of the electromagnetic parameter configuration provided in an embodiment of this application;

[0048] Figure 6 This is one of the schematic diagrams of refraction direction control provided in the embodiments of this application;

[0049] Figure 7 This is the second schematic diagram of refraction direction control provided in the embodiments of this application;

[0050] Figure 8 This is a schematic diagram of the deployment of the RIS device provided in an embodiment of this application;

[0051] Figure 9 This is a second schematic flowchart of the transmission control method provided in the embodiments of this application;

[0052] Figure 10 This is a schematic diagram of the transmission control device provided in the embodiments of this application;

[0053] Figure 11 This is a schematic diagram of the network device provided in the embodiments of this application;

[0054] Figure 12 This is a schematic diagram of the communication system provided in an embodiment of this application;

[0055] Figure 13 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] New Radio (NR) systems utilize beamforming technology to optimize coverage for various channels and signals. This technology creates narrow, energy-concentrated, highly directional beams, significantly improving channel and signal coverage performance and user experience. In NR systems, the base station (gNodeB) is responsible for beam management of various channels and signals, selecting the optimal beam for the user.

[0058] Based on the differences in the weighting strategies used during beamforming, NR beams can be divided into static beams and dynamic beams. Static beams use predefined weights during beamforming, thus forming fixed beams within the cell, the number, width, and direction of which are predetermined. In NR systems, the broadcast beam is a typical static beam, shared by the Synchronization Signal (SS) and the Physical Broadcast Channel (PBCH).

[0059] Specifically, the NR cell synchronization and broadcast channels share a single SSB beam, which is also known as the broadcast beam. As a cell-level beam, the gNodeB periodically transmits the SSB beam according to a preset SSB period (such as MS5, MS10, MS20, MS40, MS80, MS160, unit: milliseconds).

[0060] In existing NR cells, multiple SSB beams are typically used, and these beams are transmitted sequentially in the time domain. For example, Figure 1 This is a schematic diagram of the configuration of multiple SSB beams in an NR cell in related technologies. Figure 1 Each arrow points to the SSB beam configuration at a given moment. In this configuration, the filled beams are the SSB beams transmitted at that moment, and the dashed lines represent unfilled beams, indicating SSB beams not transmitted at that moment. Figure 1 As can be seen, an SSB beam is transmitted in one direction at each moment, and the direction of the SSB beam transmitted at different times is different, thereby achieving full coverage of the entire cell.

[0061] Currently, in Time Division Duplex (TDD) networks using Massive MIMO multi-channel antenna AAU equipment, there are issues such as uneven user distribution within the base station coverage area, or changes in densely populated user areas over time due to mobility. To address these problems, SSB beam optimization has emerged.

[0062] SSB beam optimization refers to selecting the optimal beam for various channels and signals based on information such as cell coverage, user distribution, and system load. There are two main methods for SSB beam optimization adjustment. The first method is to use a narrower SSB beam to point towards densely populated user areas. The second method is to adjust the SSB beam to shift the azimuth angle of the active antenna elements to point towards densely populated user areas.

[0063] In practical implementation, the TDD system supports fixed-weight beam schemes for active antenna elements as shown below. Engineers can select one of the weight configurations according to the actual coverage scenario type to complete the weight optimization of SSB beam optimization.

[0064]

[0065] For example, in a TDD sub 6GHz system, such as the n41 (2.6GHz) band, a cell SSB beam can support a maximum of 8 SSBs. The SSB beams are configured horizontally with 8 beams, i.e., H8, which corresponds to the Default0 mode in the table above and is mainly for horizontal coverage performance; the SSB beams are configured vertically with 8 beams, i.e., V8, which corresponds to the S11 and S16 modes in the table above and is mainly for vertical coverage performance.

[0066] Both of the above methods can improve coverage performance in densely populated user areas.

[0067] However, in the first method, the SSB beam narrows, which in turn narrows the cell's horizontal half-power angle after SSB beam optimization. For example, Figure 2 This is a schematic diagram of an SSB beam before and after SSB beam optimization in a related technology. Figure 2 The left side of the middle arrow shows the SSB beam before SSB beam optimization, and the right side of the arrow shows the SSB beam after SSB beam optimization. Comparing the SSB beams before and after SSB beam optimization, it can be seen that after using a narrower SSB beam, the overall horizontal half-power angle of the cell becomes narrower, which will cause a decrease in the coverage performance of users near the sidelobes of the original cell.

[0068] In the second method, adjusting the SSB beam to shift the azimuth angle of the active antenna element to point towards densely populated user areas will lead to a decrease in coverage performance for users located in the opposite direction of the active antenna element adjustment, i.e., near the original cell sidelobes. For example, Figure 3 This is another schematic diagram of SSB beam optimization before and after in related technologies. Figure 3 The left side of the middle arrow shows the SSB beam before SSB beam optimization, and the right side shows the SSB beam after SSB beam optimization. Comparing the SSB beams before and after SSB beam optimization, it can be seen that antenna azimuth offset will cause users near the original cell sidelobes before SSB beam optimization to... Figure 3 Coverage performance for users in the middle-filled area decreases.

[0069] Since SSB beam optimization considers a large proportion of users within the overall coverage area of ​​the cell, the users whose coverage performance degrades after SSB beam optimization are a small proportion within the overall coverage area of ​​the cell, and these users are often overlooked by engineers.

[0070] To address the problems caused by current SSB beam optimization, this application provides a transmission control method. Figure 4 This is one of the flowcharts illustrating the transmission control method provided in the embodiments of this application, such as... Figure 4 As shown in the embodiment of this application, a transmission control method is provided, which can be applied to a network device. The method includes:

[0071] Step 410: Determine the target cell after the synchronization signal / physical broadcast channel block (SSB) beam optimization.

[0072] Here, the target cell is the cell after SSB beam optimization. Specifically, it can be a cell that requires optimization of the coverage performance of users near the sidelobes of the original cell after SSB beam optimization.

[0073] For example, the cell that has undergone SSB beam optimization can be directly selected as the target cell, or from the cells that have undergone SSB beam optimization, the cell with the largest change in AUU antenna parameters before and after SSB beam optimization can be selected, that is, the cell where the coverage performance of users near the sidelobes of the original cell may be reduced due to SSB beam optimization, and this cell can be selected as the target cell. The embodiments of this application do not specifically limit the method of determining the target cell.

[0074] Step 420: During the SSB beam period of the target cell, activate the intelligent metasurface RIS device of the target cell and configure the electromagnetic parameters of the RIS device. The electromagnetic parameters are used to control the refraction direction of the SSB beam of the target cell through the RIS device.

[0075] Specifically, for target cells that require transmission control, RIS (Reconfigurable Intelligent Surface) devices can be configured for the target cells.

[0076] A RIS device is an artificial electromagnetic surface structure with programmable electromagnetic properties, composed of a large number of electromagnetic units. Through control circuits, the electromagnetic properties of the electromagnetic units can be dynamically adjusted to achieve intelligent reconstruction of the wireless signal propagation characteristics in three-dimensional space.

[0077] Configuring a RIS device for a target cell can specifically involve setting up the RIS device at the AAU antenna of the target cell. For example, the RIS device can be set up at a preset distance outside the AAU antenna. This preset distance can be 10 cm, 15 cm, or other distances. This application embodiment does not specifically limit this.

[0078] Furthermore, the RIS device operates within a three-node communication system, which specifically includes a transmitter, a receiver, and a RIS device equipped with a large-scale electromagnetic unit. Specifically, in this embodiment, the transmitter is the AAU antenna of the target cell, and the receiver is the terminal within the coverage area of ​​the target cell. In this scenario, the signal y received by the receiver is:

[0079]

[0080] From the above equation, it can be seen that the equivalent channel hΦH from the transmitter to the receiver via the RIS device is the product of the channel h between the RIS device and the receiver, the adjustable phase shift diagonal matrix Φ of the RIS device, and the channel H between the transmitter and the RIS device. g is the direct channel between the receiver and the transmitter. s is the signal transmitted by the transmitter, n is Gaussian white noise, and β is the propagation coefficient. When using the RIS device for communication assistance, the signal reflected by the RIS device can be expressed as the product of the incident signal and the reflection coefficient of the unit. In addition, due to the quasi-passive nature of the RIS device, the thermal noise introduced by the radiation process can be ignored.

[0081] By adjusting the relevant parameters of the RIS device based on its reflection characteristics, including the phase shift matrix Φ of the RIS device, during a set period of stable traffic, the level of the downlink reference signal receiving power (RSRP) of the terminal after the RIS device reflects the signal can be adjusted.

[0082] It is understandable that by adjusting the RIS device configured for the target cell, the refraction direction of the electromagnetic signal of the target cell when penetrating the RIS device can be adjusted, thereby achieving the control of the coverage range of the SSB beam of the target cell.

[0083] Therefore, for a target cell where coverage performance needs to be optimized for users near the sidelobes of the original cell, the RIS device of the target cell can be activated within the SSB beam period of the target cell. It can be understood that activating the RIS device of the target cell means that the refraction direction of the SSB beam of the target cell is controllable when it penetrates the RIS device, thereby enabling adjustment of the coverage range of the SSB beam of the target cell.

[0084] With the RIS device enabled, its electromagnetic parameters can be configured. These electromagnetic parameters control the refraction direction of the SSB beam as it penetrates the RIS device. By configuring these parameters, the refraction direction of the SSB beam from the target cell when penetrating the RIS device can be adjusted. Adjusting the refraction direction increases the refraction angle of the SSB beam, thereby increasing its coverage area.

[0085] It is understandable that by refracting the SSB beam through the RIS device, the coverage range of the SSB beam can be increased, thereby keeping the overall coverage range of the target cell basically consistent with the coverage range of the target cell after SSB beam optimization. In other words, the coverage performance of users near the sidelobe after SSB beam optimization can be enhanced.

[0086] The method provided in this application embodiment controls the refraction direction of the SSB beam of the target cell through the RIS device of the target cell, thereby expanding the coverage range of the SSB beam and thus expanding the overall coverage range of the target cell. In this way, while taking into account the SSB beam optimization effect, the coverage performance of users near the sidelobe is guaranteed.

[0087] Furthermore, in this embodiment of the application, by linking the SSB beam period of the target cell, the RIS device and the SSB beam are controlled to remain synchronized in the time domain, thereby ensuring the overall coverage range and coverage performance of the target cell after SSB beam optimization while ensuring the SSB beam optimization effect.

[0088] Based on the above embodiments, Figure 5 This is a schematic diagram of the electromagnetic parameter configuration provided in the embodiments of this application, such as... Figure 5 As shown, in step 420, configuring the electromagnetic parameters of the RIS device includes:

[0089] Step 421: Determine the target SSB beam to be controlled based on the type of SSB beam optimization.

[0090] Step 422: Configure the electromagnetic parameters of the RIS device based on the target SSB beam.

[0091] Specifically, SSB beam optimization can be divided into two types: cell horizontal half-power angle adjustment type and cell azimuth angle adjustment type.

[0092] One type of cell horizontal half-power angle adjustment involves using a narrower SSB beam to target densely populated user areas through SSB beam optimization. In this method, the SSB beam narrows, resulting in a narrower horizontal half-power angle after SSB beam optimization. For details, please refer to [link to relevant documentation]. Figure 2 .

[0093] Cell azimuth adjustment type refers to a method of optimizing the SSB beam by shifting the azimuth of the active antenna element to point towards densely populated user areas. Under this method, the antenna azimuth shift causes a corresponding shift in the cell azimuth. Coverage performance for users in the opposite direction of this shift deteriorates. For details, please refer to [link to relevant documentation]. Figure 3 .

[0094] Therefore, it can be seen that under different SSB beam optimization types, the SSB beams that need to be increased in coverage through refraction are also different. In the embodiments of this application, the SSB beam that needs to be intervened by the RIS device to expand the refraction angle and thus increase the coverage in one SSB beam cycle is denoted as the target SSB beam to be controlled.

[0095] For example, for cell horizontal half-power angle adjustment type, the first and last SSB beams in an SSB beam cycle can be used as target SSB beams, thereby expanding the sidelobe coverage of the target cell; for cell azimuth adjustment type, the SSB beams in the opposite direction of the cell azimuth adjustment in an SSB beam cycle can be used as target SSB beams, thereby ensuring that the expanded coverage of the target cell remains basically consistent with the coverage before SSB beam optimization.

[0096] After determining the target SSB beam, electromagnetic parameters can be configured for the RIS device based on this, so that the RIS device can control the refraction direction of the target SSB beam transmission of the target cell under this electromagnetic parameter configuration, thereby achieving coverage enhancement.

[0097] Based on any of the above embodiments, step 421, determining the target SSB beam to be controlled based on the type of SSB beam optimization, includes:

[0098] When the type of SSB beam optimization includes cell horizontal half-power angle adjustment, the first number of SSB beams and the last number of SSB beams in the SSB beam rotation of the target cell are determined as the target SSB beam.

[0099] Specifically, the cell horizontal half-power angle adjustment type involves using a narrower SSB beam to target densely populated user areas through SSB beam optimization. In this method, the SSB beam narrows, thus narrowing the cell's horizontal half-power angle after SSB beam optimization. For details, please refer to [link to relevant documentation]. Figure 2 .

[0100] When SSB beam optimization includes cell horizontal half-power angle adjustment, the overall horizontal half-power angle of the target cell will decrease, and the coverage performance of users near the sidelobes of the original cell will decline. To address this, the first number of SSB beams before and the last number of SSB beams after the SSB beam rotation of the target cell can be determined as the target SSB beam. Here, the first number is a pre-set number, assuming the first number is i. The value of i can be 1 or 2, or other values. This application embodiment does not specifically limit this value.

[0101] For example, when the SSB beam optimization type includes cell horizontal half-power angle adjustment, the first and last SSB beams in the target cell's SSB beam rotation can be used as target SSB beams. Electromagnetic parameters are then configured for the RIS device to control the refraction direction of the first and last SSB beams. This allows the two SSB beams to refract when rotating to the first and last SSB beams, ensuring that the overall coverage area of ​​the target cell after SSB beam optimization remains essentially consistent with its coverage area before SSB beam optimization.

[0102] For example, Figure 6 This is one of the schematic diagrams of refraction direction control provided in the embodiments of this application, such as... Figure 6 As shown, the electromagnetic parameters of the RIS device are configured so that the first SSB beam in the SSB beam rotation is used as the target SSB beam, causing the normal direction of the first SSB beam to be refracted after penetrating the RIS device. The refraction angle here is denoted as A. By making the refraction angle of the target SSB beam reach A, the overall coverage of the target cell after refraction modulation by the RIS device can be kept basically consistent with the coverage before SSB beam optimization, thereby enhancing the coverage performance of users near the sidelobes after SSB beam optimization.

[0103] Based on any of the above embodiments, step 421, determining the target SSB beam to be controlled based on the type of SSB beam optimization, includes:

[0104] When the type of SSB beam optimization includes cell azimuth adjustment, the second number of SSB beams after the SSB beam rotation of the target cell are determined as the target SSB beam.

[0105] Specifically, cell azimuth adjustment involves adjusting the SSB beam to shift the azimuth of the active antenna element, thus optimizing the SSB beam towards densely populated user areas. In this method, the antenna azimuth shifts, causing the cell azimuth to shift as well. Coverage performance for users in the opposite direction of this azimuth shift deteriorates. For details, please refer to [link to relevant documentation]. Figure 3 .

[0106] When SSB beam optimization includes cell azimuth adjustment, user coverage performance degrades in the opposite direction of cell azimuth offset. To address this, the second number of SSB beams after the target cell's SSB beam rotation can be used as the target SSB beam. Here, the second number can be a pre-set number or a number adaptively calculated based on the magnitude of cell azimuth adjustment; this embodiment does not specifically limit this. Assuming the second number is j, the value of j can be 1 or 2, or other calculated values; this embodiment does not specifically limit this.

[0107] For example, when the SSB beam optimization type includes cell azimuth adjustment, the last SSB beam in the target cell's SSB beam rotation can be used as the target SSB beam. This allows the RIS device to be configured with electromagnetic parameters to control the refraction direction of the last SSB beam. As a result, when the last SSB beam is rotated, it can be refracted, thereby expanding the coverage range of the last SSB beam and compensating for the coverage range shift caused by the cell azimuth shift due to SSB beam optimization.

[0108] For example, Figure 7 This is the second schematic diagram of refraction direction control provided in the embodiments of this application, as shown below. Figure 7 As shown, the electromagnetic parameters of the RIS device are configured so that the last SSB beam in the SSB beam rotation is used as the target SSB beam, causing the last SSB beam to refract in the normal direction after penetrating the RIS device. The refraction angle here is denoted as B. By making the refraction angle of the target SSB beam reach B, the overall coverage of the target cell after refraction modulation by the RIS device can be kept basically consistent with the coverage before SSB beam optimization, thereby enhancing the coverage performance of users near the sidelobes after SSB beam optimization.

[0109] Based on any of the above embodiments, the second quantity is determined based on the difference in the cell azimuth angle of the target cell before and after SSB beam optimization.

[0110] Specifically, the determination of the second quantity can be achieved by referring to the difference in the cell azimuth angle of the target cell before and after SSB beam optimization. It can be understood that the difference in the cell azimuth angle of the target cell before and after SSB beam optimization is the difference between the cell azimuth angle of the target cell after SSB beam optimization and the cell azimuth angle before SSB beam optimization. This difference reflects the adjustment range of the cell azimuth angle of the target cell due to SSB beam optimization.

[0111] Understandably, the larger the difference, the greater the shift in cell coverage caused by SSB beam optimization, and the greater the reduction in coverage performance for users near the sidelobe.

[0112] Therefore, this difference can be linked to the determination of the second quantity. That is, the larger the difference, the larger the value of the second quantity, and the more SSB beams need to be adjusted by the RIS device to expand the coverage area; the smaller the difference, the smaller the value of the second quantity, and the fewer SSB beams need to be adjusted by the RIS device to expand the coverage area.

[0113] Based on any of the above embodiments, the second quantity is determined based on the difference in the cell azimuth angle of the target cell before and after SSB beam optimization, and the horizontal half-power angle of the SSB beam of the target cell.

[0114] Specifically, in determining the second quantity, in addition to referring to the difference in the cell azimuth angle of the target cell before and after SSB beam optimization, the horizontal half-power angle of the SSB beam of the target cell can also be referenced.

[0115] Here, the horizontal half-power angle of the SSB beam is the angle at which the power in the SSB beam attenuates to half of its maximum value. Specifically, the horizontal half-power angle of the SSB beam is the angle between the two points where the main lobe is widest in the antenna radiation pattern.

[0116] After obtaining the difference in the cell azimuth angle of the target cell before and after SSB beam optimization, and the horizontal half-power angle of the SSB beam of the target cell, the difference in the cell azimuth angle can be subtracted from the horizontal half-power angle of the SSB beam. The angle difference obtained is then compared with a preset threshold, and a second quantity is determined based on the comparison magnitude. Alternatively, the difference in the cell azimuth angle can be divided by the horizontal half-power angle of the SSB beam to determine how many times the difference in the cell azimuth angle is compared to the horizontal half-power angle of the SSB beam. The resulting multiple is then used as the second quantity. This application does not specifically limit this aspect.

[0117] For example, the second quantity can be determined based on the following method:

[0118] First, the difference θ between the cell azimuth angles of the target cell before and after SSB beam optimization is calculated. 方位调整角 The horizontal half-power angle θ of the SSB beam SSB波束的水平半功率角 By comparison, the angle difference Δθ is obtained:

[0119] Δθ=θ 方位调整角 -θ SSB波束的水平半功率角

[0120] If the angle difference Δθ is less than the preset threshold T, it is considered that the angle of the cell azimuth adjustment is basically consistent with the horizontal half-power angle of the SSB beam, and the second quantity j = 1 is determined; if the angle difference Δθ is greater than the preset threshold T, it is considered that the angle of the cell azimuth adjustment is greater than the horizontal half-power angle of the SSB beam, and the second quantity j = 2 is determined.

[0121] Here, the value of the preset threshold T can be taken with reference to the value of the horizontal half-power angle of the SSB beam, for example, it can be set to 25 degrees.

[0122] In addition, in order not to affect the effect of SSB beam optimization, the maximum value of the second quantity j can be set to 2.

[0123] Based on any of the above embodiments, step 420, wherein activating the intelligent metasurface RIS device of the target cell within the SSB beam period of the target cell, includes:

[0124] During the transmission time of the target SSB beam within the SSB beam period of the target cell, the intelligent metasurface RIS device of the target cell is activated.

[0125] Specifically, SSB beams are cell-level beams. Base stations transmit SSB beams according to the SSB beam period, broadcasting synchronization and system messages. NR cells typically use multiple SSB beams, transmitting one direction's SSB beam at each moment in the time domain, and transmitting SSB beams in different directions at different times to complete coverage of the entire cell. Each SSB beam occupies four consecutive symbols in the time domain and 20 RBs (i.e., 240 subcarriers) in the frequency domain.

[0126] SSB beam transmission occurs in half-frames (5ms in length) and is performed within the SSB beam period. Within a half-frame, the base station can transmit the SSB beam from multiple candidate locations. The SSB beam's temporal location is defined within each half-frame. To conserve network resources, the SSB beam is not transmitted in every half-frame, but rather appears several times within a half-frame at regular intervals (i.e., the SSB beam period). Each of these SSB beams corresponds to a beam scanning direction, resulting in an SSB beam signal in each direction of the cell. While the SSB beam period varies, the time to complete the beam scan within each period is always within 5ms; that is, the SSB beam completes the coverage scan of the entire cell within 5ms of each SSB beam period.

[0127] The SSB beam period can be 5ms, 10ms, 20ms, 40ms, 80ms, or 160ms. This period is indicated in SIB1, but during the initial cell search, the UE has not yet received SIB1, so it will search for the SSB beam according to the default period of 20ms.

[0128] Therefore, within the SSB beam period, all SSB beams of the target cell can be transmitted in rotation. After determining the target SSB beam, the transmission time of each target SSB beam can be determined from the SSB beam period. During the transmission time of the target SSB beam, the RIS device of the target cell is ensured to be turned on, thereby enabling the target SSB beam to expand its refraction angle under the control of the RIS device, thus expanding the coverage area of ​​the target SSB beam.

[0129] Based on any of the above embodiments, step 422, configuring the electromagnetic parameters of the RIS device based on the target SSB beam, includes:

[0130] Based on the cell parameters of the target SSB beam before and after SSB beam optimization, the electromagnetic parameters of the RIS device are configured.

[0131] Specifically, after determining the target SSB beam, the cell parameters of the target SSB beam before SSB beam optimization and after SSB beam optimization can be obtained, and the changes in cell parameters of the target SSB beam before and after SSB beam optimization can be determined based on this.

[0132] Here, the changes in cell parameters before and after SSB beam optimization can be specifically reflected in the adjustment range of the horizontal half-power angle or the adjustment range of the azimuth angle. Based on this configuration of the electromagnetic parameters of the RIS device, the RIS device can control the refraction direction of the target SSB beam transmission to the RIS device in the target cell under this electromagnetic parameter configuration, thereby achieving coverage enhancement.

[0133] The method provided in this application embodiment achieves precise control of the electromagnetic parameters of the RIS device based on the cell parameters before and after SSB beam optimization, thereby controlling the refraction direction of the RIS device and ensuring the overall coverage performance of the target cell after SSB beam optimization.

[0134] Based on any of the above embodiments, step 410 includes:

[0135] Based on the cell parameters of each cell after SSB beam optimization, the target cell is determined from the cells.

[0136] Specifically, from the cells after SSB beam optimization, the cells that need to have their coverage performance optimized for users near the sidelobes can be selected, that is, the target cells can be selected.

[0137] In this embodiment, the selection of the target cell can be based on the cell parameters of each cell after SSB beam optimization. These cell parameters may include parameters related to the active antenna elements of the target cell, such as the cell horizontal half-power angle, cell azimuth angle, and electronic downtilt angle. Additionally, these cell parameters may also include parameters related to the SSB beam of the target cell, such as SSB beamcoding, SSB beam azimuth angle, SSB beam horizontal width, SSB beam vertical width, and SSB maximum power offset. This embodiment does not specifically limit these parameters.

[0138] Furthermore, the cell azimuth angle, i.e., the AAU antenna azimuth angle, can be configured according to the Time Division Duplexing (TDD) network plan. The electronic downtilt angle, i.e., the AUU antenna tilt angle, can be configured according to the network plan; specifically, when configured to the default value of 255, it represents a tilt angle of 6°. Also, the antenna tilt angle = the tilt angle value corresponding to this parameter + the mechanical tilt angle.

[0139] Parameters related to the SSB beam of the target cell, such as SSB beam coding, SSB beam azimuth, SSB beam horizontal width, SSB beam vertical width, and SSB maximum power offset, can be configured according to the actual coverage scenario. Among them, it is recommended to configure the maximum power offset of SSB to the required offset value for scenarios with large inter-cell spacing, supplementary uplink (SUL) spectrum, or PBCH or SS power constraints.

[0140] Understandably, based on the cell parameters after SSB beam optimization, it is possible to determine whether there are significant changes in the overall coverage of the cell, and thus determine whether transmission control is needed for that cell to ensure the overall coverage performance of the cell after SSB beam optimization.

[0141] Based on any of the above embodiments, step 410 includes:

[0142] Based on the cell parameters of each cell after SSB beam optimization, determine at least one of the differences in the cell horizontal half-power angle and the cell azimuth angle before and after SSB beam optimization.

[0143] The target cell is determined from the cells based on at least one of the differences in the horizontal half-power angle and the azimuth angle of each cell before and after SSB beam optimization.

[0144] Specifically, the cell parameters may include at least one of the cell horizontal half-power angle and the cell azimuth angle. Therefore, after obtaining the cell parameters of each cell after SSB beam optimization, the difference between the cell horizontal half-power angle and the difference between the cell azimuth angle before and after SSB beam optimization can be calculated by combining the cell parameters of each cell before SSB beam optimization.

[0145] The difference between the horizontal half-power angle of each cell before and after SSB beam optimization is defined as the difference between the horizontal half-power angle of each cell after SSB beam optimization and the horizontal half-power angle of the cell before SSB beam optimization. Here, the horizontal half-power angle of the cell before SSB beam optimization can be a default value or a pre-recorded value; this embodiment does not specifically limit this. For example, if the default value of the horizontal half-power angle is 105 degrees, the difference between the horizontal half-power angle of the cell after SSB optimization and 105 degrees can be calculated as the difference between the horizontal half-power angle of the cell before and after SSB beam optimization.

[0146] The difference in cell azimuth angle before and after SSB beam optimization for each cell is the difference between the cell azimuth angle after SSB beam optimization and the cell azimuth angle before SSB beam optimization. Here, the cell azimuth angle before SSB beam optimization can be the default value of the cell azimuth angle or a pre-recorded cell azimuth angle; this embodiment of the application does not specifically limit this. For example, in a TDD network, a TDD base station generally has 3 cells. The initial values ​​of the cell azimuth angles of the 3 cells can be set to 0 degrees, 120 degrees, and 240 degrees, respectively. The initial values ​​of the cell azimuth angles of each cell can be used as the cell azimuth angles before SSB beam optimization, thereby calculating the difference in cell azimuth angles before and after SSB beam optimization.

[0147] It is understandable that for any cell, if the difference between the horizontal half-power angle of the cell before and after SSB beam optimization is greater than a preset threshold, or the difference between the azimuth angle of the cell before and after SSB beam optimization is greater than a preset threshold, there may be a decrease in the coverage performance of users near the sidelobe. Therefore, the target cell can be determined from each cell based on at least one of the differences between the horizontal half-power angle of the cell before and after SSB beam optimization and the differences between the azimuth angles of the cell.

[0148] The method provided in this application determines the target cell based on at least one of the differences in the horizontal half-power angle and the azimuth angle of each cell before and after SSB beam optimization. This method can accurately locate cells with transmission control requirements, thereby ensuring the overall coverage performance of the cells after SSB optimization.

[0149] Based on any of the above embodiments, in step 410, determining the target cell from the cells based on at least one of the differences in the horizontal half-power angle and the azimuth angle of each cell before and after SSB beam optimization includes:

[0150] If the difference in the horizontal half-power angle of the cell is greater than a first threshold, or if the difference in the azimuth angle of the cell is greater than a second threshold, the cell is determined to be the target cell.

[0151] Specifically, both the first threshold and the second threshold are preset thresholds. The first threshold is used to compare with the difference between the cell's horizontal half-power angle to determine the target cell; the second threshold is used to compare with the difference between the cell's azimuth angle to determine the target cell.

[0152] In determining the target cell, the difference in the horizontal half-power angle of each cell before and after SSB beam optimization can be compared with a first threshold. If the difference in the horizontal half-power angle of any cell is greater than the first threshold, then that cell is selected as the target cell. Here, the first threshold can be 15 degrees or other values.

[0153] In addition, during the process of determining the target cell, the difference in the cell azimuth angle of each cell before and after SSB beam optimization can be compared with a second threshold. If the difference in the cell azimuth angle of any cell is greater than the second threshold, then that cell is taken as the target cell. Here, the second threshold can be 20 degrees or other values.

[0154] Based on any of the above embodiments, the RIS device is disposed at the active antenna unit of the target cell.

[0155] Specifically, the RIS device can be set at a preset distance outside the active antenna element. The preset distance can be 10 cm, 15 cm, or other distances. This application embodiment does not specifically limit this.

[0156] For example, Figure 8 This is a schematic diagram of the deployment of the RIS device provided in an embodiment of this application. Figure 8 In the process, the RIS device 820 is located outside the active antenna unit 810, and the distance between the RIS device 820 and the active antenna unit 810 is L0, where L0 can be 10 centimeters.

[0157] Based on any of the above embodiments Figure 9 This is a second schematic flowchart of the transmission control method provided in the embodiments of this application, as shown below. Figure 9 As shown, a transmission control method may include the following steps:

[0158] Step 910: Collect cell parameters for each cell after SSB beam optimization.

[0159] The cell parameters here may include parameters related to the active antenna elements of the target cell, such as the cell horizontal half-power angle, cell azimuth angle, and electronic downtilt angle. In addition, the cell parameters here may also include parameters related to the SSB beam of the target cell, such as SSB beamcoding, SSB beam azimuth angle, SSB beam horizontal width, and SSB beam vertical width. This application embodiment does not specifically limit these parameters.

[0160] Step 920: Based on the cell parameters of each cell after SSB beam optimization, determine the target cell from all cells.

[0161] After obtaining the cell parameters of each cell after SSB beam optimization, the difference between the cell horizontal half-power angle before and after SSB beam optimization can be calculated based on the cell horizontal half-power angle in the cell parameters. When the difference between the cell horizontal half-power angles is greater than the first threshold, the cell is taken as the target cell.

[0162] In addition, based on the cell azimuth angle in the cell parameters, the difference between the cell azimuth angles of each cell before and after SSB beam optimization can be calculated, and if the difference between the cell azimuth angles is greater than the second threshold, the cell can be taken as the target cell.

[0163] Step 930: Set up RIS devices for each target cell.

[0164] After identifying each target cell, RIS devices can be set up for each target cell. Furthermore, the RIS devices for each target cell can be set at a preset distance outside the AAU antenna of each target cell.

[0165] Furthermore, each target cell's RIS device is equipped with an electromagnetic control module, which is used to control the refraction of the RIS device, thereby controlling the direction of refraction of the electromagnetic signal emitted by the AAU antenna through the RIS device.

[0166] Step 940: Collect the SSB beam period of the target cell, and at the transmission time of the target SSB beam within the SSB beam period of the target cell, activate the intelligent metasurface RIS device of the target cell, so that the target SSB beam expands the refraction angle and increases the coverage area after being refracted by the RIS device.

[0167] Here, the SSB beam period of each target cell can be collected separately.

[0168] Furthermore, for each target cell, the target SSB beam can be determined. Specifically, for target cells where the SSB beam optimization type is cell horizontal half-power angle adjustment, the first and last number of SSB beams in the target cell's SSB beam rotation can be identified as the target SSB beam. Here, the first number is either 1 or 2.

[0169] For a target cell where the SSB beam optimization type is cell azimuth adjustment, the second-to-last number of SSB beams in the target cell's SSB beam rotation can be identified as the target SSB beam. Here, the second number can be 1 or 2. The value of the second number can be determined by subtracting the difference in the cell azimuth angle from the horizontal half-power angle of the SSB beam, comparing the resulting angle difference with a pre-set threshold, and determining the value based on the comparison.

[0170] After determining the target SSB beam of the target cell, the intelligent metasurface RIS device of the target cell can be activated at the transmission time of the target SSB beam within the SSB beam period of the target cell, and the electromagnetic parameters of the RIS device can be configured so that the target SSB beam expands the refraction angle and increases the coverage area after being refracted by the RIS device.

[0171] Step 950: Based on the selected period, return to execute step 910.

[0172] The period here can be hours, days, weeks, etc., and this application embodiment does not specifically limit it. Periodically executing the above transmission control method can periodically enhance the coverage performance of users near the sidelobes of the cell after SSB optimization adjustment.

[0173] This application addresses the problem that after SSB beam optimization in a TDD system, the overall horizontal half-power angle of the cell narrows, or the adjustment of the SSB beam causes the AAU antenna azimuth angle to shift, resulting in decreased coverage performance for users near the original cell sidelobes and users whose AAU antennas are adjusted in the opposite direction to the cell sidelobes. It proposes a transmission control method using a RIS device to coordinate the electromagnetic parameters of the RIS device with the SSB beam. This method utilizes the RIS device's ability to control the refraction direction, combined with the SSB beam's time-domain transmission period, to refract the target SSB beam, thereby expanding the overall cell coverage area and enhancing coverage performance.

[0174] The transmission control device provided in the embodiments of this application is described below. The transmission control device described below can be referred to in correspondence with the transmission control method described above.

[0175] Figure 10 This is a schematic diagram of the transmission control device provided in the embodiments of this application, as shown below. Figure 10 As shown, the device includes:

[0176] Cell determination unit 1010 is used to determine the target cell after synchronization signal / physical broadcast channel block (SSB) beam optimization;

[0177] The RIS control unit 1020 is used to activate the intelligent metasurface RIS device of the target cell during the SSB beam period of the target cell, and configure the electromagnetic parameters of the RIS device, wherein the electromagnetic parameters are used to control the refraction direction of the SSB beam of the target cell through the RIS device.

[0178] The apparatus provided in this application embodiment controls the refraction direction of the SSB beam of the target cell through the RIS device of the target cell, thereby expanding the coverage range of the SSB beam and thus expanding the overall coverage range of the target cell. In this way, while taking into account the SSB beam optimization effect, the coverage performance of users near the sidelobe is guaranteed.

[0179] Furthermore, in this embodiment of the application, by linking the SSB beam period of the target cell, the RIS device and the SSB beam are controlled to remain synchronized in the time domain, thereby ensuring the overall coverage range and coverage performance of the target cell after SSB beam optimization while ensuring the SSB beam optimization effect.

[0180] Based on any of the above embodiments, the RIS control unit is specifically used for:

[0181] Based on the type of SSB beam optimization, the target SSB beam to be controlled is determined.

[0182] Configure the electromagnetic parameters of the RIS device based on the target SSB beam.

[0183] Based on any of the above embodiments, the RIS control unit is specifically used for:

[0184] When the type of SSB beam optimization includes cell horizontal half-power angle adjustment, the first number of SSB beams and the last number of SSB beams in the SSB beam rotation of the target cell are determined as the target SSB beam.

[0185] Based on any of the above embodiments, the RIS control unit is specifically used for:

[0186] When the type of SSB beam optimization includes cell azimuth adjustment, the second number of SSB beams after the SSB beam rotation of the target cell are determined as the target SSB beam.

[0187] Based on any of the above embodiments, the second quantity is determined based on the difference in the cell azimuth angle of the target cell before and after SSB beam optimization.

[0188] Based on any of the above embodiments, the second quantity is determined based on the difference in the cell azimuth angle of the target cell before and after SSB beam optimization, and the horizontal half-power angle of the SSB beam of the target cell.

[0189] Based on any of the above embodiments, the RIS control unit is specifically used for:

[0190] During the transmission time of the target SSB beam within the SSB beam period of the target cell, the intelligent metasurface RIS device of the target cell is activated.

[0191] Based on any of the above embodiments, the RIS control unit is specifically used for:

[0192] Based on the cell parameters of the target SSB beam before and after SSB beam optimization, the electromagnetic parameters of the RIS device are configured.

[0193] Based on any of the above embodiments, the cell determination unit is specifically used for:

[0194] Based on the cell parameters of each cell after SSB beam optimization, the target cell is determined from the cells.

[0195] Based on any of the above embodiments, the cell determination unit is specifically used for:

[0196] Based on the cell parameters of each cell after SSB beam optimization, determine at least one of the differences in the cell horizontal half-power angle and the cell azimuth angle before and after SSB beam optimization.

[0197] The target cell is determined from the cells based on at least one of the differences in the horizontal half-power angle and the azimuth angle of each cell before and after SSB beam optimization.

[0198] Based on any of the above embodiments, the cell determination unit is specifically used for:

[0199] If the difference in the horizontal half-power angle of the cell is greater than a first threshold, or if the difference in the azimuth angle of the cell is greater than a second threshold, the cell is determined to be the target cell.

[0200] Based on any of the above embodiments, the RIS device is disposed at the active antenna unit of the target cell.

[0201] Figure 11 This is a schematic diagram of the network device provided in the embodiments of this application, with reference to... Figure 11 This application also provides a network device, which may include: a memory 1110, a transceiver 1120, and a processor 1130;

[0202] Memory 1110 is used to store computer programs; transceiver 1120 is used to send and receive data under the control of processor 1130; processor 1130 is used to read the computer program in memory 1110 and perform the following operations:

[0203] Determine the target cell after SSB beam optimization for the Synchronization Signal / Physical Broadcast Channel Block (SSB).

[0204] During the SSB beam cycle of the target cell, the intelligent metasurface RIS device of the target cell is activated, and the electromagnetic parameters of the RIS device are configured. The electromagnetic parameters are used to control the refraction direction of the SSB beam of the target cell through the RIS device.

[0205] The network device involved in the embodiments of this application can be a base station, which may include multiple cells providing services to terminals. Depending on the specific application, a base station may also be called an access point, or a device in an access network that communicates with wireless terminal devices through one or more sectors on the air interface, or other names.

[0206] Among them, Figure 11 In this context, the bus architecture may include any number of interconnected buses and bridges, specifically linking various circuits together, represented by one or more processors (processor 1130) and memory (memory 1110). The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 1120 may be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium. The processor 1130 is responsible for managing the bus architecture and general processing, and the memory 1110 may store data used by the processor 1130 during operation.

[0207] Optionally, configuring the electromagnetic parameters of the RIS device includes:

[0208] Based on the type of SSB beam optimization, the target SSB beam to be controlled is determined.

[0209] Configure the electromagnetic parameters of the RIS device based on the target SSB beam.

[0210] Optionally, determining the target SSB beam to be controlled based on the type of SSB beam optimization includes:

[0211] When the type of SSB beam optimization includes cell horizontal half-power angle adjustment, the first number of SSB beams and the last number of SSB beams in the SSB beam rotation of the target cell are determined as the target SSB beam.

[0212] Optionally, determining the target SSB beam to be controlled based on the type of SSB beam optimization includes:

[0213] When the type of SSB beam optimization includes cell azimuth adjustment, the second number of SSB beams after the SSB beam rotation of the target cell are determined as the target SSB beam.

[0214] Optionally, the second quantity is determined based on the difference in the cell azimuth angle of the target cell before and after SSB beam optimization.

[0215] Optionally, the second quantity is determined based on the difference in the cell azimuth angle of the target cell before and after SSB beam optimization, and the horizontal half-power angle of the SSB beam of the target cell.

[0216] Optionally, activating the intelligent metasurface RIS device of the target cell during the SSB beam period of the target cell includes:

[0217] During the transmission time of the target SSB beam within the SSB beam period of the target cell, the intelligent metasurface RIS device of the target cell is activated.

[0218] Optionally, configuring the electromagnetic parameters of the RIS device based on the target SSB beam includes:

[0219] Based on the cell parameters of the target SSB beam before and after SSB beam optimization, the electromagnetic parameters of the RIS device are configured.

[0220] Optionally, determining the target cell after synchronization signal / physical broadcast channel block (SSB) beam optimization includes:

[0221] Based on the cell parameters of each cell after SSB beam optimization, the target cell is determined from the cells.

[0222] Optionally, determining the target cell from the cells based on the cell parameters of each cell after SSB beam optimization includes:

[0223] Based on the cell parameters of each cell after SSB beam optimization, determine at least one of the differences in the cell horizontal half-power angle and the cell azimuth angle before and after SSB beam optimization.

[0224] The target cell is determined from the cells based on at least one of the differences in the horizontal half-power angle and the azimuth angle of each cell before and after SSB beam optimization.

[0225] Optionally, determining the target cell from the cells based on at least one of the differences in the horizontal half-power angle and the azimuth angle of each cell before and after SSB beam optimization includes:

[0226] If the difference in the horizontal half-power angle of the cell is greater than a first threshold, or if the difference in the azimuth angle of the cell is greater than a second threshold, the cell is determined to be the target cell.

[0227] Optionally, the RIS device is located at the active antenna unit of the target cell.

[0228] It should be noted that the network device provided in this application embodiment can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0229] Figure 12 This is a schematic diagram of the communication system provided in the embodiments of this application, such as... Figure 12 As shown, the communication system includes the network device 1210 provided in the above embodiments, and the intelligent metasurface RIS device 1220 disposed at the active antenna unit of each target cell.

[0230] In this embodiment, each target cell has a RIS device 1220 installed at its active antenna element. Therefore, after the network device 1210 completes SSB beam optimization and determines the target cell after SSB beam optimization, the intelligent metasurface RIS device 1220 of the target cell can be activated within the SSB beam period of the target cell, and the electromagnetic parameters of the RIS device 1220 can be configured. These electromagnetic parameters are used to control the refraction direction of the SSB beam of the target cell through the RIS device 1220.

[0231] The system provided in this application embodiment controls the refraction direction of the SSB beam of the target cell through the RIS device of the target cell, thereby expanding the coverage range of the SSB beam and thus expanding the overall coverage range of the target cell. In this way, while taking into account the SSB beam optimization effect, the coverage performance of users near the sidelobe is guaranteed.

[0232] Furthermore, in this embodiment of the application, by linking the SSB beam period of the target cell, the RIS device and the SSB beam are controlled to remain synchronized in the time domain, thereby ensuring the overall coverage range and coverage performance of the target cell after SSB beam optimization while ensuring the SSB beam optimization effect.

[0233] Figure 13 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 13 As shown, the electronic device may include: a processor 1310, a communication interface 1320, a memory 1330, and a communication bus 1340, wherein the processor 1310, the communication interface 1320, and the memory 1330 communicate with each other via the communication bus 1340. The processor 1310 can call a computer program stored in the memory 1330 to execute steps of the transmission control method, such as including:

[0234] Determine the target cell after SSB beam optimization for the Synchronization Signal / Physical Broadcast Channel Block (SSB).

[0235] During the SSB beam cycle of the target cell, the intelligent metasurface RIS device of the target cell is activated, and the electromagnetic parameters of the RIS device are configured. The electromagnetic parameters are used to control the refraction direction of the SSB beam of the target cell through the RIS device.

[0236] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0237] On the other hand, embodiments of this application also provide a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can perform the steps of the transmission control method provided in the above embodiments, such as including:

[0238] Determine the target cell after SSB beam optimization for the Synchronization Signal / Physical Broadcast Channel Block (SSB).

[0239] During the SSB beam cycle of the target cell, the intelligent metasurface RIS device of the target cell is activated, and the electromagnetic parameters of the RIS device are configured. The electromagnetic parameters are used to control the refraction direction of the SSB beam of the target cell through the RIS device.

[0240] On the other hand, embodiments of this application also provide a processor-readable storage medium storing a computer program for causing a processor to perform the steps of the methods provided in the above embodiments, such as including:

[0241] Determine the target cell after SSB beam optimization for the Synchronization Signal / Physical Broadcast Channel Block (SSB).

[0242] During the SSB beam cycle of the target cell, the intelligent metasurface RIS device of the target cell is activated, and the electromagnetic parameters of the RIS device are configured. The electromagnetic parameters are used to control the refraction direction of the SSB beam of the target cell through the RIS device.

[0243] The processor-readable storage medium can be any available medium or data storage device that the processor can access, including but not limited to magnetic memory (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO)), optical memory (e.g., CD, DVD, BD, HVD), and semiconductor memory (e.g., ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)).

[0244] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0245] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0246] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A transmission control method, characterized in that, include: Determine the target cell after SSB beam optimization for the Synchronization Signal / Physical Broadcast Channel Block (SSB). During the SSB beam period of the target cell, the intelligent metasurface RIS device of the target cell is activated, and the electromagnetic parameters of the RIS device are configured. The electromagnetic parameters are used to control the refraction direction of the SSB beam of the target cell through the RIS device. The electromagnetic parameters configured for the RIS device include: Based on the type of SSB beam optimization, the target SSB beam to be controlled is determined. Based on the cell parameters of the target SSB beam before and after SSB beam optimization, configure the electromagnetic parameters of the RIS device. The determination of the target SSB beam to be controlled based on the type of SSB beam optimization includes: When the type of SSB beam optimization includes cell horizontal half-power angle adjustment, the first number of SSB beams and the last number of SSB beams of the target cell's SSB beam rotation are determined as the target SSB beam. or, When the type of SSB beam optimization includes cell azimuth adjustment, the second number of SSB beams after the SSB beam rotation of the target cell are determined as the target SSB beam.

2. The transmission control method according to claim 1, characterized in that, The second quantity is determined based on the difference in the cell azimuth angle of the target cell before and after SSB beam optimization.

3. The transmission control method according to claim 2, characterized in that, The second quantity is determined based on the difference in the cell azimuth angle of the target cell before and after SSB beam optimization, and the horizontal half-power angle of the SSB beam of the target cell.

4. The transmission control method according to any one of claims 1 to 3, characterized in that, The step of activating the intelligent metasurface RIS device of the target cell during the SSB beam period of the target cell includes: During the transmission time of the target SSB beam within the SSB beam period of the target cell, the intelligent metasurface RIS device of the target cell is activated.

5. The transmission control method according to any one of claims 1 to 3, characterized in that, The determination of the target cell after synchronization signal / physical broadcast channel block (SSB) beam optimization includes: Based on the cell parameters of each cell after SSB beam optimization, the target cell is determined from the cells.

6. The transmission control method according to claim 5, characterized in that, The process of determining the target cell from the cells based on the cell parameters after SSB beam optimization includes: Based on the cell parameters of each cell after SSB beam optimization, determine at least one of the differences in the cell horizontal half-power angle and the cell azimuth angle before and after SSB beam optimization. The target cell is determined from the cells based on at least one of the differences in the horizontal half-power angle and the azimuth angle of each cell before and after SSB beam optimization.

7. The transmission control method according to claim 6, characterized in that, The step of determining the target cell from the cells based on at least one of the differences in the horizontal half-power angle and the azimuth angle of each cell before and after SSB beam optimization includes: If the difference in the horizontal half-power angle of the cell is greater than a first threshold, or if the difference in the azimuth angle of the cell is greater than a second threshold, the cell is determined to be the target cell.

8. The transmission control method according to any one of claims 1 to 3, characterized in that, The RIS device is located at the active antenna unit of the target cell.

9. A transmission control device, characterized in that, include: The cell determination unit is used to determine the target cell after the synchronization signal / physical broadcast channel block (SSB) beam optimization. The RIS control unit is used to activate the intelligent metasurface RIS device of the target cell during the SSB beam period of the target cell, and configure the electromagnetic parameters of the RIS device, wherein the electromagnetic parameters are used to control the refraction direction of the SSB beam of the target cell through the RIS device. The electromagnetic parameters configured for the RIS device include: Based on the type of SSB beam optimization, the target SSB beam to be controlled is determined. Based on the cell parameters of the target SSB beam before and after SSB beam optimization, configure the electromagnetic parameters of the RIS device. The determination of the target SSB beam to be controlled based on the type of SSB beam optimization includes: When the type of SSB beam optimization includes cell horizontal half-power angle adjustment, the first number of SSB beams and the last number of SSB beams of the target cell's SSB beam rotation are determined as the target SSB beam. or, When the type of SSB beam optimization includes cell azimuth adjustment, the second number of SSB beams after the SSB beam rotation of the target cell are determined as the target SSB beam.

10. A network device, characterized in that, Includes memory, transceiver, and processor; A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations: Determine the target cell after SSB beam optimization for the Synchronization Signal / Physical Broadcast Channel Block (SSB). During the SSB beam period of the target cell, the intelligent metasurface RIS device of the target cell is activated, and the electromagnetic parameters of the RIS device are configured. The electromagnetic parameters are used to control the refraction direction of the SSB beam of the target cell through the RIS device. The electromagnetic parameters configured for the RIS device include: Based on the type of SSB beam optimization, the target SSB beam to be controlled is determined. Based on the cell parameters of the target SSB beam before and after SSB beam optimization, configure the electromagnetic parameters of the RIS device. The determination of the target SSB beam to be controlled based on the type of SSB beam optimization includes: When the type of SSB beam optimization includes cell horizontal half-power angle adjustment, the first number of SSB beams and the last number of SSB beams of the target cell's SSB beam rotation are determined as the target SSB beam. or, When the type of SSB beam optimization includes cell azimuth adjustment, the second number of SSB beams after the SSB beam rotation of the target cell are determined as the target SSB beam.

11. A communication system, characterized in that, This includes the network device as described in claim 10, and the intelligent metasurface RIS device disposed at the active antenna unit of each target cell.

12. An electronic device comprising a processor and a memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the transmission control method according to any one of claims 1 to 8.

13. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the transmission control method as described in any one of claims 1 to 8.

14. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the transmission control method according to any one of claims 1 to 8.

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