Transmission path switching methods and apparatuses, electronic devices and storage media

Abstract

This invention provides a transmission path switching method, apparatus, electronic device, and storage medium, relating to the field of communication technology. The method includes: detecting the presence of obstacles on a first transmission path at preset intervals, the first transmission path transmitting signals in a line-of-sight mode; if an obstacle is detected on the first transmission path, planning a second transmission path without obstacles, and using the second transmission path as the current transmission signal path; wherein the second transmission path is a virtual line-of-sight transmission path created based on a RIS array transmission; if no obstacle is detected on the first transmission path, and the current transmission signal path is the second transmission path, switching the current transmission signal path from the second transmission path to the first transmission path. This invention solves the problem of low system efficiency caused by the large amount of data required for signal transmission via a virtual line-of-sight transmission path established by a RIS array during user terminal movement, thereby improving system efficiency.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a transmission path switching method and apparatus, electronic device and storage medium. Background Technology

[0002] With socio-economic development and scientific progress, people's demand for wireless devices is increasing, and their requirements for the quality of wireless communication are also becoming higher. The unevenness and instability of wireless signal coverage have always been challenges in wireless communication. Due to obstacles such as buildings and terrain, user terminals are often located in signal coverage blind spots, affecting communication quality and user experience. In recent years, the development of Reconfigurable Intelligent Surface (RIS) technology has brought new ideas. RIS arrays are composed of a large number of programmable elements, enabling flexible manipulation of electromagnetic waves. Through modulation and reflection, they can flexibly adjust the wireless communication environment, changing the configuration of the wireless propagation environment and helping to improve the coverage and energy efficiency of wireless communication systems.

[0003] For communication scenarios where the line-of-sight transmission path is blocked, a RIS array virtual line-of-sight transmission path can be established to transmit communication signals, thereby improving the coverage and energy efficiency of the wireless communication system. However, in practice, the computational complexity of the RIS array virtual line-of-sight transmission path is high, resulting in significant computation time, impacting overall system efficiency, and increasing user waiting time. In scenarios where user terminals are constantly moving, the virtual line-of-sight transmission path needs to be continuously recalculated based on the user terminal's new location. This further increases the amount of computational data and complexity, leading to a further reduction in system efficiency and failing to meet current efficiency requirements. Summary of the Invention

[0004] This invention provides a transmission path switching method and apparatus, electronic device and storage medium to solve the defect in the prior art where the large amount of data required to transmit signals through the virtual line-of-sight transmission path established by the RIS array during user terminal movement leads to low system efficiency, thereby achieving the goal of improving system efficiency.

[0005] This invention provides a transmission path switching method, comprising the following steps: detecting whether there is an obstacle on a first transmission path at preset intervals, the first transmission path transmitting signals in a line-of-sight mode; if an obstacle is detected on the first transmission path, planning a second transmission path without obstacles, and using the second transmission path as the path of the current transmitted signal; wherein, the second transmission path is a virtual line-of-sight transmission path created based on RIS array transmission; if no obstacle is detected on the first transmission path, and the path of the current transmitted signal is the second transmission path, switching the path of the current transmitted signal from the second transmission path to the first transmission path.

[0006] According to a transmission path switching method provided by the present invention, the step of planning a second transmission path without obstacles when an obstacle is detected on the first transmission path includes: when an obstacle is detected on the first transmission path, obtaining the direction of arrival (DOA) information of the signal sent by the transmitting end to each of the reflection units; and constructing the virtual line-of-sight transmission path by adjusting the reflection coefficient matrix of the RIS array based on the DOA information corresponding to each of the reflection units and the second position of the receiving terminal.

[0007] According to a transmission path switching method provided by the present invention, the step of obtaining the direction of arrival (DOA) information of the signal sent by the transmitting end to each of the reflection units includes: obtaining the DOA information of each of the reflection units according to the modulation coefficient matrix of the RIS array and the array manifold matrix.

[0008] According to a transmission path switching method provided by the present invention, the step of constructing the virtual line-of-sight transmission path by adjusting the reflection coefficient matrix of the RIS array based on the DOA information corresponding to each of the reflection units and the second position currently located of the receiving terminal includes: obtaining the RIS reflection coefficient corresponding to each of the reflection units based on the DOA information corresponding to each of the reflection units and the mapping relationship between preset DOA information and preset RIS reflection coefficients; and adjusting the reflection coefficient matrix of the RIS array based on the RIS reflection coefficient corresponding to each of the reflection units to construct the virtual line-of-sight transmission path.

[0009] According to a transmission path switching method provided by the present invention, the step of detecting whether there is an obstacle on the first transmission path of the transmission signal at preset intervals includes: detecting whether there is an obstacle on the first transmission path of the transmission signal at preset intervals based on an adaptive detection algorithm.

[0010] According to a transmission path switching method provided by the present invention, the adaptive detection algorithm is a generalized likelihood ratio detection (GLRT).

[0011] The present invention also provides a transmission path switching device, comprising the following modules:

[0012] The detection module is used to detect whether there are obstacles on the first transmission path at preset intervals. The first transmission path transmits signals in a line-of-sight mode.

[0013] The first processing module is configured to, when the detection module detects an obstacle on the first transmission path, plan a second transmission path without obstacles and use the second transmission path as the path for the current transmission signal; wherein the second transmission path is a virtual line-of-sight transmission path created based on RIS array transmission.

[0014] The second processing module is used to switch the path of the current transmission signal from the second transmission path to the first transmission path if the detection module detects that there is no obstacle on the first transmission path and the current transmission signal path is the second transmission path.

[0015] According to a transmission path switching device provided by the present invention, the first processing module includes an acquisition unit and a processing unit.

[0016] The acquisition unit is used to acquire the direction of arrival (DOA) information of the signals sent by the transmitting end to each of the reflection units when an obstacle is detected on the first transmission path.

[0017] The processing unit is used to construct the virtual line-of-sight transmission path by adjusting the reflection coefficient matrix of the RIS array based on the direction of arrival (DOA) information corresponding to each of the reflection units and the second position where the receiving terminal is currently located.

[0018] According to a transmission path switching device provided by the present invention, the acquisition unit is used to: obtain the direction of arrival (DOA) information corresponding to each of the reflection units based on the control coefficient matrix of the RIS array and the array manifold matrix.

[0019] According to a transmission path switching device provided by the present invention, the processing unit is configured to: obtain the RIS reflection coefficient corresponding to each reflection unit based on the DOA information corresponding to each reflection unit and the mapping relationship between the preset DOA information and the preset RIS reflection coefficient; and adjust the reflection coefficient matrix of the RIS array to construct the virtual line-of-sight transmission path based on the RIS reflection coefficient corresponding to each reflection unit.

[0020] According to a transmission path switching device provided by the present invention, the detection module is used to: detect whether there is an obstacle on the first transmission path of the transmission signal at preset intervals based on an adaptive detection algorithm.

[0021] According to a transmission path switching device provided by the present invention, the adaptive detection algorithm is a generalized likelihood ratio detection (GLRT).

[0022] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the transmission path switching method as described above.

[0023] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the transmission path switching method as described above.

[0024] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the transmission path switching method as described above.

[0025] The transmission path switching method, apparatus, electronic device, and storage medium provided by this invention can detect the presence of obstacles on a first transmission path at preset intervals. The first transmission path transmits signals using a line-of-sight transmission method. If an obstacle is detected on the first transmission path, a second transmission path without obstacles is planned and used as the current transmission path. The second transmission path is a virtual line-of-sight transmission path created based on a RIS array. If no obstacle is detected on the first transmission path, and the current transmission path is the second transmission path, the current transmission path is switched back to the first transmission path. This invention allows for flexible decision-making on when to use a RIS array to establish a virtual line-of-sight transmission path for signal transmission, solving the problem of low system efficiency in existing technologies where the large amount of data required for signal transmission via a RIS array during user terminal movement leads to low system efficiency. This invention aims to improve system efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in this invention 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 invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a flowchart illustrating the transmission path switching method provided in an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram illustrating an example of the transmission path switching method provided in an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of the transmission path switching device provided in the embodiment of the present invention.

[0030] Figure 4 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0032] The following is combined Figures 1-2 The transmission path switching method of the present invention is described.

[0033] Figure 1 This is a flowchart illustrating the transmission path switching method provided by the present invention. Figure 1 As shown, the method includes the following steps S110~S130.

[0034] S110: Detect whether there is an obstacle on the first transmission path at preset intervals. The first transmission path transmits signals in line-of-sight mode.

[0035] When the receiving terminal is in a mobile state, the relative positions of the transmitting and receiving terminals change. Therefore, when transmitting signals between the transmitting and receiving terminals in a line-of-sight mode, there may be obstacles on the first transmission path between the transmitting and receiving terminals at some times, and at other times there may be no obstacles on the first transmission path between the transmitting and receiving terminals. Therefore, the presence of obstacles on the first transmission path for signal transmission in a line-of-sight mode is detected every preset time interval. The transmitting end can be, for example, a base station or a terminal device such as a transmitting terminal.

[0036] The preset duration can be set by those skilled in the art according to actual conditions, and the embodiments of the present invention do not limit this.

[0037] Specifically, detecting whether there are obstacles on the first transmission path of the transmitted signal at preset intervals can be achieved by using an adaptive detection algorithm to detect whether there are obstacles on the first transmission path of the transmitted signal at preset intervals.

[0038] In some embodiments, the adaptive detection algorithm may be, for example, the Generalized Likelihood Ratio Test (GLRT).

[0039] Specifically, the adaptive detection algorithm divides the received signal data into two parts: one part is the data to be detected, which may contain target echoes (i.e., in this example, there may be obstacles on the transmission path); the other part is auxiliary data, which only contains background interference data and is independently and identically distributed with the background interference data in the data to be detected. This can be denoted as... Let K be the k-th auxiliary data point, and K be the number of auxiliary data points. The sample covariance matrix can be calculated using the following formula: .in, Let H be the sample covariance matrix, and H be the transpose sign.

[0040] For ease of description, remember The decision expression for the GLRT algorithm is as follows: .in, For the data to be tested, The guide vectors are H1 and H0, respectively, representing the obstacle-prone and unobstructed situations. This is the signal strength threshold.

[0041] The above example only illustrates the process of determining whether there is an obstacle on the first transmission path based on GLRT. In specific implementations, the adaptive detection algorithm in the embodiments of the present invention includes, but is not limited to, GLRT. Other adaptive detection algorithms besides GLRT can also be used to determine whether there is an obstacle on the first transmission path, such as the Adaptive Matched Filter (AMF) algorithm, or the Adaptive Coherence Estimator (ACE) algorithm, etc.

[0042] S120: If an obstacle is detected on the first transmission path, a second transmission path without obstacles is planned, and the second transmission path is used as the path for the current transmission signal; wherein, the second transmission path is a virtual line-of-sight transmission path created based on RIS array transmission.

[0043] See Figure 2 At time t1, when the first transmission path is detected ( Figure 2 If there is an obstacle on the path (marked with red cross lines), the transmitting end (i.e., the path marked with red cross lines) will be blocked because the first transmission path is obstructed. Figure 2 The signal emitted by the access point (in the process) cannot be transmitted to the receiving terminal, therefore a second transmission path without obstacles is planned, namely... Figure 2 The green arrows indicate the virtual line-of-sight transmission path from the access point to the RIS array and from the RIS array to the terminal, which is reflected by the RIS array, to ensure that signal transmission is not interrupted by the presence of obstacles.

[0044] In some embodiments, after an obstacle is detected on the first transmission path, a virtual line-of-sight transmission path can be created in the following manner.

[0045] First, the direction of arrival (DOA) information corresponding to each reflector of the RIS array is obtained from the signal sent by the transmitter. Then, based on the DOA information corresponding to each reflector and the current second position of the receiving terminal, a virtual line-of-sight transmission path is constructed by adjusting the reflection coefficient matrix of the RIS array.

[0046] Based on the control coefficient matrix and array manifold matrix of the RIS array, the DOA information corresponding to the signal transmitted by the transmitter reaching each reflection unit can be obtained.

[0047] Specifically, the modulation coefficient matrix of the RIS array (i.e., the array composed of reflective units) in the RIS array can be denoted as: The array manifold matrix is The expected signal to reach RIS is The noise signal is The received signal of the RIS array can be represented by the following formula: + .in, Indicates receiving signal, Represents a spatial angle.

[0048] Following this, the atomic norm minimization method can be used to model the DOA calculation problem, resulting in the following calculation model: .in, The coefficients are non-positive definite. For data fitting terms, Since the variable to be solved is , the above calculation model can be converted into a semi-positive definite programming problem and then solved to obtain the DOA information.

[0049] After obtaining the DOA information corresponding to each reflective element, the reflection coefficient of the RIS array is calculated based on the DOA information corresponding to each reflective element and the second position of the receiving terminal.

[0050] Specifically, the signal gain can be maximized at the angle of incidence of the signal transmitted by the transmitter onto the RIS array and at the angle of reflection of the signal from the RIS array, thereby constructing a virtual line-of-sight transmission path and setting the desired function.

[0051] In the above expectation function, Indicates the current radiation pattern. Representing the target radiation pattern using the expectation function Common search algorithms, such as genetic algorithms and particle swarm optimization, can be used to search for the reflection coefficients of the desired RIS array.

[0052] In some embodiments, to reduce computational complexity, the RIS reflection coefficients for each corresponding direction can be pre-trained, a mapping relationship between preset DOA information and preset RIS reflection coefficients can be established, and then after obtaining the DOA information corresponding to each reflection unit, the RIS reflection coefficients corresponding to each reflection unit can be obtained according to the DOA information corresponding to each reflection unit and the above mapping relationship; finally, the reflection coefficient matrix of the RIS array is adjusted according to the RIS reflection coefficients corresponding to each reflection unit to construct a virtual line-of-sight transmission path.

[0053] It should be noted that the execution subject in this embodiment of the invention is the receiving terminal. In this case, the second position is the position where the execution subject itself is located.

[0054] S130: If no obstacle is detected on the first transmission path, and the current transmission signal path is the second transmission path, switch the current transmission signal path from the second transmission path to the first transmission path.

[0055] Please continue reading Figure 2 At time t2, after time t1, the receiving terminal moved to the position shown in the dashed box, as follows. Figure 2 As shown by the dashed arrow, based on the position of the receiving terminal at time t2, there are no obstacles on the first transmission path of the signal transmitted between the transmitting and receiving terminals in line-of-sight mode. In this case, if the current transmission path is the second transmission path, the current transmission path is switched from the second transmission path to the first transmission path; if the current transmission path is the first transmission path, no change is made, and the signal continues to be transmitted using the first transmission path. This ensures that the amount of data processed by the system is minimized, thereby improving the system's working efficiency.

[0056] When the receiving terminal is in a mobile state, the second transmission path needs to be continuously updated based on the receiving terminal's location. Therefore, the amount of data to be processed when transmitting signals via the second transmission path is greater than that transmitted via the first transmission path, resulting in lower system efficiency and failing to meet current efficiency requirements. Therefore, when no obstacles are detected on the first transmission path, the current transmission path is the second transmission path. The system promptly switches the current transmission path from the second to the first transmission path to reduce the amount of data to be processed and improve signal transmission quality (the signal transmission quality of the first transmission path is higher than that of the second path), thereby improving system efficiency.

[0057] The transmission path switching method provided by this invention can detect whether there are obstacles on a first transmission path at preset intervals. The first transmission path transmits signals in a line-of-sight mode. If an obstacle is detected on the first transmission path, a second transmission path without obstacles is planned and used as the current transmission path. The second transmission path is a virtual line-of-sight transmission path created based on a RIS array. If no obstacle is detected on the first transmission path, and the current transmission path is the second transmission path, the current transmission path is switched back to the first transmission path. This invention can flexibly decide when to use a RIS array to establish a virtual line-of-sight transmission path to transmit signals based on actual conditions, solving the problem of low system efficiency caused by the large amount of data required for signal transmission via a RIS array during user terminal movement in existing technologies, thus improving system efficiency.

[0058] The transmission path switching device provided by the present invention is described below. The transmission path switching device described below can be referred to in correspondence with the transmission path switching method described above.

[0059] Figure 3 This is a schematic diagram of the transmission path switching device provided in an embodiment of the present invention. Figure 3 As shown, the transmission path switching device 300 includes the following modules.

[0060] The detection module 301 is used to detect whether there are obstacles on the first transmission path at preset intervals. The first transmission path transmits signals in a line-of-sight mode.

[0061] The first processing module 302 is used to plan a second transmission path without obstacles when the detection module 301 detects an obstacle on the first transmission path, and use the second transmission path as the path of the current transmission signal; wherein the second transmission path is a virtual line-of-sight transmission path created based on RIS array transmission.

[0062] The second processing module 303 is used to switch the path of the current transmission signal from the second transmission path to the first transmission path if the detection module 301 detects that there is no obstacle on the first transmission path and the current transmission signal path is the second transmission path.

[0063] In some embodiments, the first processing module 302 includes:

[0064] Acquisition Unit ( Figure 3 (not shown in the image), used to obtain the direction of arrival (DOA) information of the signal sent by the transmitter to each reflecting unit when an obstacle is detected on the first transmission path;

[0065] Processing unit ( Figure 3 (Not shown in the image) is used to construct a virtual line-of-sight transmission path by adjusting the reflection coefficient matrix of the RIS array based on the DOA information corresponding to each reflection unit and the current second position of the receiving terminal.

[0066] In some embodiments, the acquisition unit is used to: obtain the direction of arrival (DOA) information corresponding to each reflection unit based on the control coefficient matrix of the RIS array and the array manifold matrix.

[0067] In some embodiments, the processing unit is configured to: obtain the RIS reflection coefficient corresponding to the DOA information of each reflection unit according to the DOA information corresponding to each reflection unit and the mapping relationship between the preset DOA information and the preset RIS reflection coefficient; and adjust the reflection coefficient matrix of the RIS array according to the RIS reflection coefficient corresponding to the DOA information of each reflection unit to construct a virtual line-of-sight transmission path.

[0068] In some embodiments, the detection module is used to: detect whether there is an obstacle on the first transmission path of the transmitted signal at preset intervals based on an adaptive detection algorithm.

[0069] In some embodiments, the adaptive detection algorithm is the generalized likelihood ratio detection (GLRT).

[0070] The transmission path switching device provided by this invention can detect whether there are obstacles on a first transmission path at preset intervals. The first transmission path transmits signals in a line-of-sight mode. If an obstacle is detected on the first transmission path, a second transmission path without obstacles is planned and used as the current transmission path. The second transmission path is a virtual line-of-sight transmission path created based on a RIS array. If no obstacle is detected on the first transmission path, and the current transmission path is the second transmission path, the current transmission path is switched back to the first transmission path. This invention can flexibly decide when to use a RIS array to establish a virtual line-of-sight transmission path to transmit signals based on actual conditions, solving the problem of low system efficiency in existing technologies due to the large amount of data required for signal transmission via a RIS array during user terminal movement, thus improving system efficiency.

[0071] Figure 4 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 4As shown, the electronic device may include a processor 410, a communications interface 420, a memory 430, and a communication bus 440, wherein the processor 410, communications interface 420, and memory 430 communicate with each other via the communication bus 440. The processor 410 can call logical instructions in the memory 430 to execute a transmission path switching method. This method includes: detecting whether there is an obstacle on a first transmission path at preset intervals, the first transmission path transmitting signals in a line-of-sight mode; if an obstacle is detected on the first transmission path, planning a second transmission path without obstacles, and using the second transmission path as the current transmission signal path; wherein the second transmission path is a virtual line-of-sight transmission path created based on RIS array transmission; if no obstacle is detected on the first transmission path, and the current transmission signal path is the second transmission path, switching the current transmission signal path from the second transmission path to the first transmission path.

[0072] Furthermore, the logical instructions in the aforementioned memory 430 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 the present invention, essentially, 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 of the various embodiments of the present invention. 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.

[0073] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the transmission path switching method provided by the above methods. The method includes: detecting whether there is an obstacle on a first transmission path at preset intervals, wherein the first transmission path transmits signals in a line-of-sight mode; if an obstacle is detected on the first transmission path, planning a second transmission path without obstacles and using the second transmission path as the path of the current transmission signal; wherein the second transmission path is a virtual line-of-sight transmission path created based on RIS array transmission; if no obstacle is detected on the first transmission path, and the path of the current transmission signal is the second transmission path, switching the path of the current transmission signal from the second transmission path to the first transmission path.

[0074] In another aspect, the present invention also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the transmission path switching method provided by the above methods. The method includes: detecting whether there is an obstacle on a first transmission path at preset intervals, the first transmission path transmitting signals in a line-of-sight mode; if an obstacle is detected on the first transmission path, planning a second transmission path without obstacles, and using the second transmission path as the path of the current transmitted signal; wherein the second transmission path is a virtual line-of-sight transmission path created based on RIS array transmission; if no obstacle is detected on the first transmission path, and if the path of the current transmitted signal is the second transmission path, switching the path of the current transmitted signal from the second transmission path to the first transmission path.

[0075] 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.

[0076] 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.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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; and these 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 the present invention.

Claims

1. A method for switching transmission paths, characterized in that, include: Every preset time interval, the system checks whether there are obstacles on the first transmission path, and the first transmission path transmits signals in a line-of-sight transmission mode. If an obstacle is detected on the first transmission path, a second transmission path without obstacles is planned, and the second transmission path is used as the path for the current transmitted signal; wherein, the second transmission path is a virtual line-of-sight transmission path created based on RIS array transmission; the step of planning a second transmission path without obstacles when an obstacle is detected on the first transmission path includes: when an obstacle is detected on the first transmission path, obtaining the direction of arrival (DOA) information corresponding to each reflecting unit according to the control coefficient matrix and array manifold matrix of the RIS array; obtaining the RIS reflection coefficient corresponding to each reflecting unit according to the DOA information corresponding to each reflecting unit and the mapping relationship between preset DOA information and preset RIS reflection coefficients; and adjusting the reflection coefficient matrix of the RIS array to construct the virtual line-of-sight transmission path according to the RIS reflection coefficient corresponding to each reflecting unit. If no obstacle is detected on the first transmission path, and the current transmission signal path is the second transmission path, the current transmission signal path is switched from the second transmission path to the first transmission path.

2. The transmission path switching method according to claim 1, characterized in that, The system checks for obstacles on the first transmission path of the transmitted signal at preset intervals, including: An adaptive detection algorithm is used to detect whether there are obstacles on the first transmission path of the transmitted signal at preset intervals.

3. The transmission path switching method according to claim 2, characterized in that, The adaptive detection algorithm is the Generalized Likelihood Ratio Detection (GLRT).

4. A transmission path switching device, characterized in that, include: The detection module is used to detect whether there are obstacles on the first transmission path at preset intervals. The first transmission path transmits signals in a line-of-sight transmission mode. A first processing module is configured to, when the detection module detects an obstacle on the first transmission path, plan a second transmission path without obstacles and use the second transmission path as the path for the current transmitted signal; wherein the second transmission path is a virtual line-of-sight transmission path created based on RIS array transmission; the step of planning a second transmission path without obstacles when the detection module detects an obstacle on the first transmission path includes: when an obstacle is detected on the first transmission path, obtaining the direction of arrival (DOA) information corresponding to each reflecting unit according to the control coefficient matrix and array manifold matrix of the RIS array; obtaining the RIS reflection coefficient corresponding to each reflecting unit according to the DOA information corresponding to each reflecting unit and the mapping relationship between preset DOA information and preset RIS reflection coefficients; and adjusting the reflection coefficient matrix of the RIS array to construct the virtual line-of-sight transmission path according to the RIS reflection coefficient corresponding to each reflecting unit. The second processing module is used to switch the path of the current transmission signal from the second transmission path to the first transmission path if the detection module detects that there is no obstacle on the first transmission path and the current transmission signal path is the second transmission path.

5. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the transmission path switching method as described in any one of claims 1 to 3.

6. A 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 path switching method as described in any one of claims 1 to 3.

7. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the transmission path switching method as described in any one of claims 1 to 3.

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