Information transmission method and related equipment

Abstract

The present disclosure provides an information transmission method and related devices. The method executed by a first device includes: obtaining first device information of the first device, second device information of a second device, and obstacle information between the first device and the second device; obtaining first channel parameters between the first device and the second device; determining first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameters; determining a target reflection phase shift of an intelligent reflecting surface and a target precoding matrix of the first device according to the first channel state information, where the target reflection phase shift is used to determine target parameters of the intelligent reflecting surface; and transmitting a transmitted signal processed by the target precoding matrix to the second device through the intelligent reflecting surface adjusted to the target parameters. The communication capacity between the first device and the second device can be improved. Embodiments of the present disclosure can be applied to the transportation field.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular, to an information transmission method, a first device, an electronic device, a computer-readable storage medium, and a computer program product. Background Art

[0002] In a wireless communication environment, between different devices communicating with each other, such as a first device and a second device, it is easy to be blocked by obstacles, resulting in a reduction in the transmission rate and a decline in communication quality, which is not conducive to information transmission between the first device and the second device. Summary of the Invention

[0003] Embodiments of the present disclosure provide an information transmission method, a first device, an electronic device, a computer-readable storage medium, and a computer program product, which can improve the communication quality between the first device and the second device.

[0004] Embodiments of the present disclosure provide an information transmission method, which is executed by a first device. Wherein, the method includes: obtaining first device information of the first device, second device information of the second device, and obstacle information between the first device and the second device; obtaining a first channel parameter between the first device and the second device; determining first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter; determining a target reflection phase shift of an intelligent reflecting surface and a target precoding matrix of the first device according to the first channel state information, where the target reflection phase shift is used to determine target parameters of the intelligent reflecting surface; and sending a transmitted signal processed by the target precoding matrix to the second device through the intelligent reflecting surface adjusted to the target parameters.

[0005] An embodiment of the present disclosure provides an information transmission method, which is executed by a second device. The method includes: sending metadata to facilitate the first device receiving the metadata sent by the second device and the metadata sent by the second device received through the intelligent reflecting surface, and performing channel estimation processing based on the metadata received from the second device and the metadata received from the intelligent reflecting surface to obtain a first channel parameter between the first device and the second device, a second channel parameter between the first device and the intelligent reflecting surface, and a third channel parameter between the intelligent reflecting surface and the second device; receiving, through the intelligent reflecting surface adjusted to target parameters, the transmitted signal processed by the target precoding matrix sent by the first device. The first device is configured to obtain first device information of the first device, second device information of the second device, and obstacle information between the first device and the second device, determine a first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter, obtain a second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter, obtain a third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter, and determine a target reflection phase shift and the target precoding matrix of the intelligent reflecting surface according to the first channel state information, the second channel state information, and the third channel state information, where the target reflection phase shift is used to determine the target parameters of the intelligent reflecting surface.

[0006] An embodiment of the present disclosure provides an information transmission method, which is executed by a roadside unit. The method includes: collecting second device information of a second device and obstacle information between a first device and the second device; sending the second device information and the obstacle information to the first device. The first device is configured to obtain first device information of the first device, obtain a first channel parameter between the first device and the second device, a second channel parameter between the first device and an intelligent reflecting surface, and a third channel parameter between the intelligent reflecting surface and the second device, determine first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter, obtain second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter, obtain third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter, determine a target reflection phase shift of the intelligent reflecting surface and a target precoding matrix of the first device according to the first channel state information, the second channel state information, and the third channel state information, where the target reflection phase shift is used to determine target parameters of the intelligent reflecting surface, and send a transmission signal processed by the target precoding matrix to the second device through the intelligent reflecting surface adjusted to the target parameters.

[0007] An embodiment of the present disclosure provides an information transmission method, which is executed by an intelligent reflecting surface. The method includes: receiving metadata sent by a second device; sending the metadata received from the second device to a first device, so that the first device performs channel estimation processing according to the metadata received from the second device and the metadata received from the intelligent reflecting surface, to obtain a first channel parameter between the first device and the second device, a second channel parameter between the first device and the intelligent reflecting surface, and a third channel parameter between the intelligent reflecting surface and the second device. The first device is configured to obtain first device information of the first device, second device information of the second device, and obstacle information between the first device and the second device, determine first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter, obtain second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter, obtain third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter, and determine a target reflection phase shift of the intelligent reflecting surface and a target precoding matrix of the first device according to the first channel state information, the second channel state information, and the third channel state information; determine target parameters of the intelligent reflecting surface according to the target reflection phase shift; receive a transmitted signal processed by the target precoding matrix sent by the first device; process the transmitted signal processed by the target precoding matrix by using the target parameters of the intelligent reflecting surface, and send it to the second device.

[0008] An embodiment of the present disclosure provides a first device, which includes: a device obstacle information acquisition unit configured to acquire first device information of the first device, second device information of a second device, and obstacle information between the first device and the second device; a channel parameter acquisition unit configured to acquire a first channel parameter between the first device and the second device; a first channel state information determination unit configured to determine first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter; a reflection phase shift precoding matrix determination unit configured to determine a target reflection phase shift of an intelligent reflecting surface and a target precoding matrix of the first device according to the first channel state information, where the target reflection phase shift is used to determine target parameters of the intelligent reflecting surface; and a transmitted signal processing and transmission unit configured to send a transmitted signal processed by the target precoding matrix to the second device through the intelligent reflecting surface adjusted to the target parameters.

[0009] An embodiment of the present disclosure provides a second device, which includes: a metadata sending unit, configured to send metadata, so that a first device can receive the metadata sent by the second device from the second device, and receive the metadata sent by the second device through an intelligent reflecting surface, and perform channel estimation processing according to the metadata received from the second device and the metadata received from the intelligent reflecting surface, to obtain a first channel parameter between the first device and the second device, a second channel parameter between the first device and the intelligent reflecting surface, and a third channel parameter between the intelligent reflecting surface and the second device; a signal receiving unit, configured to receive a transmission signal processed by a target precoding matrix sent by the first device through the intelligent reflecting surface adjusted to target parameters. Wherein, the first device is configured to obtain first device information of the first device, second device information of the second device, and obstacle information between the first device and the second device, determine first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter, obtain second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter, obtain third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter, and determine a target reflection phase shift and the target precoding matrix of the intelligent reflecting surface according to the first channel state information, the second channel state information, and the third channel state information, where the target reflection phase shift is used to determine the target parameters of the intelligent reflecting surface.

[0010] An embodiment of the present disclosure provides a roadside unit, which includes: a device obstacle information acquisition unit for acquiring second device information of a second device and obstacle information between a first device and the second device; a device obstacle information sending unit for sending the second device information and the obstacle information to the first device. Wherein, the first device is configured to obtain first device information of the first device, obtain a first channel parameter between the first device and the second device, a second channel parameter between the first device and an intelligent reflecting surface, and a third channel parameter between the intelligent reflecting surface and the second device, determine first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information and the first channel parameter, obtain second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter, obtain third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter, determine a target reflection phase shift of the intelligent reflecting surface and a target precoding matrix of the first device according to the first channel state information, the second channel state information and the third channel state information, the target reflection phase shift is used to determine target parameters of the intelligent reflecting surface, and send a transmission signal processed by the target precoding matrix to the second device through the intelligent reflecting surface adjusted to the target parameters.

[0011] An embodiment of the present disclosure provides an intelligent reflecting surface, which includes: a metadata receiving unit for receiving metadata sent by a second device; a metadata reflecting unit for sending the metadata received from the second device to a first device, so that the first device performs channel estimation processing according to the metadata received from the second device and the metadata received from the intelligent reflecting surface, to obtain a first channel parameter between the first device and the second device, a second channel parameter between the first device and the intelligent reflecting surface, and a third channel parameter between the intelligent reflecting surface and the second device. The first device is configured to obtain first device information of the first device, second device information of the second device, and obstacle information between the first device and the second device, and determine first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter, obtain second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter, obtain third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter, and determine a target reflection phase shift of the intelligent reflecting surface and a target precoding matrix of the first device according to the first channel state information, the second channel state information, and the third channel state information; a target parameter adjusting unit for determining target parameters of the intelligent reflecting surface according to the target reflection phase shift; a transmitted signal receiving unit for receiving a transmitted signal processed by the target precoding matrix sent by the first device; a transmitted signal reflecting unit for processing the transmitted signal processed by the target precoding matrix by using the target parameters of the intelligent reflecting surface and sending it to the second device.

[0012] An embodiment of the present disclosure provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the information transmission method in the above embodiment is implemented.

[0013] An embodiment of the present disclosure provides an electronic device, including: one or more processors; a storage device configured to store one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the information transmission method in the above embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The flowchart of the information transmission method according to an embodiment of the present disclosure is schematically shown.

[0015] Figure 2 The application scenario diagram of the information transmission method according to an embodiment of the present disclosure is schematically shown.

[0016] Figure 3 Schematically shows a schematic diagram of an application scenario of an information transmission method according to another embodiment of the present disclosure.

[0017] Figure 4 Schematically shows a flowchart of an information transmission method according to another embodiment of the present disclosure.

[0018] Figure 5 Schematically shows a schematic diagram of an application scenario of an information transmission method according to yet another embodiment of the present disclosure.

[0019] Figure 6 Schematically shows a flowchart of an information transmission method according to another embodiment of the present disclosure.

[0020] Figure 7 Schematically shows a flowchart of an information transmission method according to yet another embodiment of the present disclosure.

[0021] Figure 8 Schematically shows a flowchart of an information transmission method according to still another embodiment of the present disclosure.

[0022] Figure 9 Schematically shows a block diagram of a first device according to an embodiment of the present disclosure.

[0023] Figure 10 Schematically shows a block diagram of a second device according to an embodiment of the present disclosure.

[0024] Figure 11 Schematically shows a block diagram of a roadside unit according to an embodiment of the present disclosure.

[0025] Figure 12 Schematically shows a block diagram of an intelligent reflecting surface according to an embodiment of the present disclosure.

[0026] Figure 13 Shows a schematic diagram of the structure of an electronic device suitable for implementing the embodiments of the present disclosure. Detailed implementation manners

[0027] First, some terms that appear in the embodiments of the present disclosure are explained.

[0028] IRS: Intelligent Reflecting Surface, which is the abbreviation of Intelligent Reflecting Surface. The IRS can intelligently reconfigure the wireless propagation environment by integrating a large number of low-cost passive reflection elements on a plane, thereby significantly improving the performance of the wireless communication network and achieving sustainable capacity growth of future wireless networks under the conditions of low cost, low complexity, and low energy consumption.

[0029] LoS: Line-of-Sight wireless transmission, which is the abbreviation of Line-of-Sight.

[0030] NLoS: Non-Line-of-Sight wireless transmission, which is the abbreviation of Non-Line-of-Sight. The propagation conditions of a wireless communication system can be divided into two environments: Line-of-Sight and Non-Line-of-Sight. Under Line-of-Sight conditions, the wireless signal propagates "in a straight line" between the transmitting end (such as the first device or the second device below) and the receiving end (such as the second device or the first device) without obstruction, and there are no objects blocking the radio waves within the first Fresnel zone. If the conditions are not met, the signal strength will decrease significantly. The size of the Fresnel zone depends on the frequency of the radio wave and the distance between the transceiver.

[0031] RSU: Road Side Unit, which is the abbreviation of Road Side Unit. It is installed on the roadside. For example, it can adopt DSRC (Dedicated Short Range Communication) technology and communicate with the On-Board Unit (OBU) installed on the vehicle to achieve functions such as vehicle identity recognition.

[0032] UAV: Unmanned Aerial Vehicle, which is the abbreviation of Unmanned Aerial Vehicle. The UAV does not require a pilot to drive in the cabin, and the entire flight process is automatically completed under the control of electronic devices.

[0033] MRT: Maximum Ratio Transmission, which is the abbreviation of Maximum Ratio Transmission.

[0034] 4G: The 4th generation mobile communication technology, which is the abbreviation of the 4th generation mobile communication technology.

[0035] 5G: The 5th generation mobile communication technology, which is the abbreviation of the 5th generation mobile communication technology.

[0036] Figure 1 Schematically shows a flowchart of an information transmission method according to an embodiment of the present disclosure. Figure 1 The embodiment is illustrated by taking the first device to execute the method as an example, but the present disclosure is not limited thereto.

[0037] The first device in the embodiments of the present disclosure can be any electronic device with communication and computing processing capabilities, such as various terminals, and / or servers, and / or communication devices, etc.

[0038] The server in the embodiments of the present disclosure may be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services.

[0039] The terminal may be a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart watch, a vehicle-mounted terminal, a smart TV, etc., but is not limited thereto. The terminal and the server may be directly or indirectly connected by wired or wireless communication means, and the present disclosure does not make any limitations herein.

[0040] In the following illustrative examples, the first device is taken as a communication device for illustration.

[0041] The communication device in the embodiments of the present disclosure may be an active communication device capable of acting as a transmission source, for example, it may include 4G / 5G base stations, RSUs, Wi-Fi, etc.

[0042] As Figure 1 shown, the method provided by the embodiments of the present disclosure may include:

[0043] In S110, obtain the first device information of the first device, the second device information of the second device, and the obstacle information between the first device and the second device.

[0044] In the embodiments of the present disclosure, the second device may be any electronic device with communication capabilities, such as various terminals, and / or servers, and / or communication devices, etc.

[0045] In the following illustrative examples, the second device is taken as a transportation device for illustration.

[0046] The transportation device in the embodiments of the present disclosure may be any device with transportation functions. If the transportation device has the ability of autonomous driving, it may be called an autonomous driving transportation device.

[0047] Among them, an autonomous driving transportation device refers to a transportation device that can automatically and safely operate with the collaborative cooperation of artificial intelligence, vision computing, radar, monitoring devices, positioning systems, etc., without active human operation or with less human assistance. The application of autonomous driving technology to transportation devices can save a large amount of human resources and improve road traffic safety at the same time.

[0048] In the following illustrative examples, the transportation device is taken as a vehicle for illustration.

[0049] The vehicle in the embodiments of the present disclosure may include any one or more of a manned vehicle, an intelligent connected vehicle, an unmanned vehicle (or called an autonomous driving vehicle), etc.

[0050] In the embodiments of the present disclosure, an on-vehicle unit may be installed on a vehicle, and the vehicle may establish communication with a first device, such as the aforementioned communication device, through a radio communication subsystem built in its on-vehicle unit.

[0051] In the following illustrative examples, a container truck (hereinafter simply referred to as a container truck) in a vehicle is further used as an example for illustration, but the present disclosure is not limited thereto.

[0052] The obstacle in the embodiments of the present disclosure may refer to any object that obstructs communication between the first device and the second device. In the following illustrative examples, if the vehicle is a container truck, it is assumed that the obstacle is a container stacked in a port for illustration, but the present disclosure is not limited thereto.

[0053] In the embodiments of the present disclosure, the obstacle information between the first device and the second device may change as the second device moves and / or the obstacle itself changes (such as changes in height, width, volume, etc.).

[0054] In an exemplary embodiment, obtaining the second device information of the second device and the obstacle information between the first device and the second device may include: receiving the second device information and the obstacle information from a roadside unit.

[0055] The roadside unit RSU in the embodiments of the present disclosure may also be referred to as a roadside sensing device, which may include one or more of a camera, a lidar, a millimeter wave radar, various sensors, etc. The roadside sensing device may be installed on the roadside, and can provide real-time environmental data around the roadside, and then send the collected data to the background, such as the first device, through, for example, optical fiber and / or 4G / 5G base stations, etc., for real-time management of the road conditions.

[0056] In the embodiments of the present disclosure, the second device information and / or the obstacle information may be collected by the roadside sensing device, and the collected second device information and / or the obstacle information may be sent to the first device.

[0057] It can be understood that the present disclosure does not limit the manner in which the first device obtains the first device information, the second device information, and the obstacle information. The first device information may be stored locally in the first device itself or remotely stored on other servers, and when needed, the first device reads the first device information therefrom.

[0058] In other embodiments, the first device may also receive the second device information and / or the obstacle information from the second device itself.

[0059] For example, if the second device is a heavy truck with autonomous driving capabilities, the heavy truck may be equipped with a sensing device. For example, the sensing device may include a positioning device, which can be used to capture the real-time position information of the heavy truck (hereinafter referred to as the second position). The positioning device may be, for example, a GPS (Global Positioning System) module. The second device can report the second position to the first device through the on-vehicle unit.

[0060] As another example, the second device can also report the height information of the second device (hereinafter referred to as the third height h1) to the first device.

[0061] In some embodiments, the sensing device may further include an image acquisition device (such as a camera), which can be used to collect obstacle information and report the collected obstacle information to the first device. For example, the image of the container can be collected by the camera on the heavy truck, and through image processing of the container image, the height of the container (hereinafter referred to as the first height h2) can be identified.

[0062] It should be noted that in the embodiments of the present disclosure, when the second device reports the second device information and / or obstacle information to the first device, it can be that the on-vehicle terminal installed on the second device sends the second device information and / or obstacle information to the first device, or any module with wireless communication function installed on the second device sends the second device information and / or obstacle information to the first device. The present disclosure does not limit this.

[0063] In the embodiments of the present disclosure, the second device can report the second device information and / or obstacle information to the first device at a set specific frequency. The specific frequency can be set according to actual needs. For example, it can be reported once every 1 s, or different reporting frequencies can be set for different second device information and / or obstacle information, etc.; it can also be reported to the first device in an event-triggered manner. When a pre-set trigger event occurs, the second device information and / or obstacle information is reported to the first device. The trigger event can be set according to the actual situation, and the present disclosure does not limit this.

[0064] In the embodiments of the present disclosure, the second device information and / or obstacle information can be transmitted to the first device through the radio air interface.

[0065] In S120, obtain the first channel parameter between the first device and the second device.

[0066] In the embodiments of the present disclosure, in addition to obtaining the first channel parameter between the first device and the second device, the first device can also obtain the second channel parameter between the first device and the IRS, and the third channel parameter between the IRS and the second device.

[0067] In an exemplary embodiment, obtaining the first channel parameter between the first device and the second device, the second channel parameter between the first device and the intelligent reflecting surface, and the third channel parameter between the intelligent reflecting surface and the second device may include: receiving metadata sent by the second device from the second device; receiving metadata sent by the second device through the intelligent reflecting surface; and performing channel estimation processing based on the metadata received from the second device and the metadata received from the intelligent reflecting surface to obtain the first channel parameter, the second channel parameter, and the third channel parameter.

[0068] The IRS in the embodiments of the present disclosure may be installed on the wall at a high place of a building (however, the present disclosure does not limit the installation position and installation method of the IRS, and specific settings can be made according to actual needs). When the line-of-sight link between the first device (such as a communication device) and the second device (such as a vehicle) is blocked (including partial blockage and full blockage), a line-of-sight communication can be established between the communication device and the vehicle. When there is no blockage between the communication device and the vehicle, the IRS can also be used to assist the communication between the communication device and the vehicle, that is, it is assumed here that there is a line-of-sight link between the IRS and the vehicle and between the IRS and the communication device.

[0069] In the embodiments of the present disclosure, the link for the second device to send data to the first device is called the uplink, and the link for the first device to send data to the second device is called the downlink. For the uplink, the second device may send metadata information to the first device. A part of the metadata information can be directly received by the first device, such as a communication device, and another part of the metadata information can be reflected to the communication device through the IRS. The communication device receives the metadata information directly sent by the second device and the metadata information reflected by the IRS for channel estimation to obtain the first channel parameter between the first device (such as a base station) and the second device, the second channel parameter between the base station and the IRS, and the third channel parameter between the IRS and the second device, so as to jointly estimate the first channel state information between the base station and the second device, the second channel state information between the base station and the IRS, and the third channel state information between the IRS and the second device for subsequent use.

[0070] In an exemplary embodiment, the first channel parameter may include a first line-of-sight component and a first non-line-of-sight component between the first device and the second device. The first line-of-sight component may be represented, for example, as the LoS channel matrix between the first device and the second device, and the first non-line-of-sight component may be represented, for example, as the NLoS channel covariance matrix between the first device and the second device.

[0071] In an exemplary embodiment, the second channel parameter may include a second line-of-sight component and a second non-line-of-sight component between the first device and the IRS. The second line-of-sight component may be represented, for example, as the LoS channel matrix between the first device and the IRS, and the second non-line-of-sight component may be represented, for example, as the NLoS channel covariance matrix between the first device and the IRS.

[0072] In an exemplary embodiment, the third channel parameter may include a third line-of-sight component and a third non-line-of-sight component between the IRS and the second device. The third line-of-sight component may be represented, for example, as the LoS channel matrix between the IRS and the second device, and the third non-line-of-sight component may be represented, for example, as the NLoS channel covariance matrix between the IRS and the second device.

[0073] In S130, according to the first device information, the second device information, the obstacle information, and the first channel parameter, determine the first channel state information between the first device and the second device.

[0074] In an exemplary embodiment, the first device information may include the ground position visible area of the first device and a first position; the second device information may include a second position of the second device; the obstacle information may include a first height of the obstacle; and the first channel parameter may include a first non-line-of-sight component between the first device and the second device.

[0075] In the embodiments of the present disclosure, the visible area of the first device refers to the range that the electromagnetic wave radiated outward by the first device, such as a communication device, can cover with the geographical location of the first device (referred to as the first position) as the center without considering reflection.

[0076] The ground position visible area of the first device refers to the area on the ground that the electromagnetic wave radiated outward by the first device, such as a communication device, can cover without considering reflection.

[0077] In an exemplary embodiment, determining the first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter may include: determining a first distance between the first device and the second device according to the first position and the second position; if it is determined according to the second position that the second device is outside the ground position visible area, the first height is greater than a first threshold, and the first distance is greater than a second threshold, then obtain the first channel state information between the first device and the second device according to the first non-line-of-sight component.

[0078] In the above embodiments, an example is given where the first device calculates the first distance d between the first device and the second device based on the acquired first position and second position. However, the present disclosure is not limited thereto. In other embodiments, for example, a sensing device such as a lidar may also be installed on the second device. The first distance d between the first device and the second device can be directly measured by this sensing device, and then the measured first distance d is reported to the first device. The present disclosure does not limit the manner in which the first device obtains the first distance.

[0079] In the embodiments of the present disclosure, when the first device determines, based on the second position of the second device obtained from the roadside unit, that the second device is outside the visible area of the ground position of the first device, and determines that the first height of the obstacle between the first device and the second device is greater than the first threshold (threshold 1) and the first distance between the first device and the second device is greater than the second threshold (threshold 2), it can be determined that the line-of-sight link between the first device and the second device is completely blocked.

[0080] The envelope of a stationary narrowband Gaussian random process follows a Rayleigh distribution. In an actual scenario, a scenario with rich scattering sources can be modeled as a Rayleigh distribution, that is, the signal is reflected, superimposed, and converged from multiple signals. Since the LoS link between the first device, such as a communication device, and the second device, such as a vehicle, is affected by the dynamic changes of obstacles, when the line-of-sight link between the communication device and the vehicle is completely blocked / obstructed, the channel fading between the communication device and the vehicle can be modeled as Rayleigh fading, that is, it is considered that the channel between the communication device and the vehicle follows a Rayleigh (Gaussian) distribution, that is, it is determined that the channel between the communication device and the vehicle is a Rayleigh channel.

[0081] In the embodiments of the present disclosure, it is assumed that the first channel state information between the first device and the second device is represented as h su , then when the channel between the first device and the second device follows a Rayleigh distribution, h su can be expressed as:

[0082]

[0083] In the above formula, α su represents the path loss coefficient between the first device and the second device; g su,NLoS represents the first non-line-of-sight component between the first device and the second device, which follows a Gaussian distribution with zero mean.

[0084] Among them, the path loss coefficient between the first device and the second device can be calculated according to the free space path loss function d is the first distance (in meters) between the transmitting and receiving locations, that is, between the first device and the second device, is the path loss exponent between the first device and the second device, which is generally greater than 2.

[0085] In an exemplary embodiment, the first device information may further include a second height h3 of the first device; the second device information may further include a third height h1 of the second device; the obstacle information may further include a third position of the obstacle.

[0086] In an exemplary embodiment, the method may further include: obtaining a second distance d1 between the second device and the obstacle according to the second position and the third position; determining the first threshold according to the second distance, the second height, the third height, and the first distance.

[0087] In the above embodiment, an example is given in which the first device calculates a second distance d1 between the second device and the obstacle according to the obtained second position and third position, but the present disclosure is not limited thereto. In other embodiments, for example, a sensing device such as a lidar may be further installed on the second device, and the second distance d1 between the second device and the obstacle can be directly measured by the sensing device, and then the measured second distance d1 is reported to the first device. The present disclosure does not limit the manner in which the first device obtains the second distance.

[0088] In an exemplary embodiment, the first device information may further include a second height h3 of the first device; the second device information includes a third height h1 of the second device.

[0089] In an exemplary embodiment, the method may further include: obtaining a first distance factor and a meteorological factor; determining the second threshold according to the first distance factor, the meteorological factor, the third height, and the second height.

[0090] In the embodiments of the present disclosure, the first threshold and the second threshold can be set according to the actual situation. In the following example, it is assumed that the straight-line distance between the first device and the second device is a first distance d, the straight-line distance between the second device and the obstacle is a second distance d1, the straight-line distance between the obstacle and the first device is d2, the third height of the second device is h1, the first height of the obstacle is h2, and the second height of the first device is h3.

[0091] For example, the first threshold can be expressed as:

[0092]

[0093] For example, the second threshold can be expressed as:

[0094] Threshold 2 = 1.7d0 (3)

[0095] In the above formula, 1.7 is the first distance factor. However, this is only an example for illustration and is not limited thereto. d0 is the line-of-sight distance of the first device and can be expressed by the following formula:

[0096]

[0097] In the above formula, k is the meteorological factor. The meteorological factor can be obtained from the regular data of the national surface meteorological observatory stations.

[0098] That is, in the embodiments of the present disclosure, if the second device is located outside the visible area of the ground position of the first device and simultaneously satisfies and d > 1.7d0, it can be determined that the line-of-sight link between the second device and the first device is completely blocked.

[0099] In an exemplary embodiment, the first device information may include the visible area of the ground position of the first device and the first position; the second device information may include the second position of the second device; the obstacle information includes the first height of the obstacle; and the first channel parameter may include the first line-of-sight component between the first device and the second device.

[0100] In an exemplary embodiment, determining the first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter may include: determining the first distance between the first device and the second device according to the first position and the second position; if it is determined according to the second position that the second device is located within the visible area of the ground position, the first height is less than the third threshold, and the first distance is less than the fourth threshold, then obtaining the first channel state information between the first device and the second device according to the first line-of-sight component.

[0101] In the embodiments of the present disclosure, when the first device determines, according to the second position of the second device obtained from the roadside unit, that the second device is located within the visible area of the ground position of the first device, and determines that the first height of the obstacle between the first device and the second device is less than the third threshold (threshold 3) and the first distance between the first device and the second device is less than the fourth threshold (threshold 4), it can be determined that the line-of-sight link between the first device and the second device is not blocked at all, that is, it can be considered that the second device is within the line of sight of the first device.

[0102] Since the second device, such as a vehicle, is completely within the line of sight of the first device, such as a communication device, the LoS link between the communication device and the vehicle dominates, and the channel between the communication device and the vehicle can be modeled as a direct channel. The direct channel can be represented by an antenna array matrix. Parameters related to the antenna array matrix, such as the angle of departure and the angle of arrival, can be obtained through an adaptive moment estimation algorithm, and then the first line-of-sight component of the signal can be obtained.

[0103] In the embodiments of the present disclosure, it is assumed that the first channel state information between the first device and the second device is represented as h su , then when the channel between the first device and the second device is modeled as a direct channel, h su can be expressed as:

[0104]

[0105] In the above formula, g su,LoS represents the first line-of-sight component between the first device and the second device.

[0106] In an exemplary embodiment, the first device information may further include a second height of the first device; the obstacle information may further include a third position of the obstacle.

[0107] In an exemplary embodiment, the method may further include: obtaining a second distance between the second device and the obstacle according to the second position and the third position; determining the third threshold according to the second distance, the second height, and the first distance.

[0108] In an exemplary embodiment, the first device information may further include a second height of the first device; the second device information further includes a third height of the second device.

[0109] In an exemplary embodiment, the method may further include: obtaining a second distance factor and a meteorological factor; determining the fourth threshold according to the second distance factor, the meteorological factor, the third height, and the second height.

[0110] In the embodiments of the present disclosure, the third threshold and the fourth threshold can be set according to actual needs.

[0111] For example, the third threshold can be expressed as:

[0112]

[0113] For example, the fourth threshold can be expressed as:

[0114] Threshold 4 = 0.7d0 (7)

[0115] In the above formula, 0.7 is the second distance factor. However, only an example is used here for illustration and is not limited thereto.

[0116] That is, in the embodiments of the present disclosure, if the second device is within the visible area of the ground position of the first device and simultaneously satisfies and d < 0.7d0, it can be determined that the line-of-sight link between the second device and the first device is completely unobstructed.

[0117] In an exemplary embodiment, the first device information may include the visible area of the ground position of the first device and the first position; the second device information may include the second position of the second device; the obstacle information may include the first height of the obstacle; and the first channel parameter may include the first line-of-sight component and the first non-line-of-sight component between the first device and the second device.

[0118] In an exemplary embodiment, determining the first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter may include: determining the first distance between the first device and the second device according to the first position and the second position; if it is determined according to the second position that the second device is outside the visible area of the ground position and the first height is less than or equal to the first threshold, or the first distance is less than or equal to the second threshold; or, if it is determined according to the second position that the second device is within the visible area of the ground position and the first height is greater than or equal to the third threshold, or the first distance is greater than or equal to the fourth threshold, then obtaining the first channel state information between the first device and the second device according to the first line-of-sight component and the first non-line-of-sight component.

[0119] For example, if the second device is outside the visible area of the ground position of the first device and simultaneously satisfies Or, if the second device is outside the visible area of the ground position of the first device and simultaneously satisfies d ≤ 1.7d0; or, if the second device is within the visible area of the ground position of the first device and simultaneously satisfies Or, if the second device is within the visible area of the ground position of the first device and simultaneously satisfies d ≥ 0.7d0, it can be determined that a part of the second device, such as a vehicle, is within the line-of-sight range of the first device, such as a communication device, and the channel between the communication device and the vehicle is modeled as a Rice channel, that is, it is assumed that the channel between the communication device and the vehicle follows a Rice distribution.

[0120] In the embodiments of the present disclosure, it is assumed that the first channel state information between the first device and the second device is represented as h su , then when the channel between the first device and the second device is modeled as a Rice channel, hsu It can be expressed as:

[0121]

[0122] In the above formula, k su represents the Rice factor between the first device and the second device. The Rice factor between the first device and the second device reflects the proportional relationship between the power of the direct component and the power of the non-direct (scattered) component in the Rice channel between the first device and the second device. The Rice factor of the Rice channel between the first device and the second device can be extracted based on the moment estimation method of the signal envelope. The value range of the Rice factor between the first device and the second device is affected by the signal power of the line-of-sight link and is generally between -10 and 10 dB.

[0123] In S140, determine the target reflection phase shift of the intelligent reflecting surface and the target precoding matrix of the first device according to the first channel state information, and the target reflection phase shift is used to determine the target parameters of the intelligent reflecting surface.

[0124] In an exemplary embodiment, determining the target reflection phase shift of the intelligent reflecting surface and the target precoding matrix of the first device according to the first channel state information between the first device and the second device may include: obtaining the second channel parameters between the first device and the intelligent reflecting surface, and the third channel parameters between the intelligent reflecting surface and the second device; obtaining the second channel state information between the first device and the intelligent reflecting surface according to the second channel parameters; obtaining the third channel state information between the intelligent reflecting surface and the second device according to the third channel parameters; obtaining the downlink ergodic capacity between the first device and the second device according to the first channel state information, the second channel state information, and the third channel state information; determining the target reflection phase shift according to the downlink ergodic capacity; and obtaining the target precoding matrix according to the first channel state information, the second channel state information, the third channel state information, and the target reflection phase shift.

[0125] In an exemplary embodiment, the second channel parameters may include a second line-of-sight component and a second non-line-of-sight component between the first device and the intelligent reflecting surface; the third channel parameters may include a third line-of-sight component and a third non-line-of-sight component between the intelligent reflecting surface and the second device.

[0126] In the embodiments of the present disclosure, it is assumed that the second channel state information between the IRS and the first device is represented as h sr , and the third channel state information between the IRS and the second device is represented as h ru .

[0127] The distribution of the Rice channel is the distribution of the envelope of a sine wave plus a narrowband Gaussian random process, including a line-of-sight component and a non-line-of-sight component, where the non-line-of-sight component follows a Rayleigh distribution and the line-of-sight component is a deterministic constant. Since the IRS can provide an additional line-of-sight link for the first device such as a communication device and the second device such as a vehicle, the link passing through the IRS, that is, the channels between the IRS and the vehicle and between the communication device and the IRS, are modeled as Rice distributions.

[0128] In the embodiments of the present disclosure, it is assumed that the second channel state information between the IRS and the first device is represented as h sr , then because the channel between the IRS and the first device is modeled as a Rice channel, h sr can be expressed as:

[0129]

[0130] In the above formula, k sr represents the Rice factor between the IRS and the first device; α sr represents the path loss coefficient between the IRS and the first device; g sr,LoS represents the second line-of-sight component between the IRS and the first device; g sr,NLoS represents the second non-line-of-sight component between the IRS and the first device.

[0131] In the embodiments of the present disclosure, it is assumed that the third channel state information between the IRS and the second device is represented as h ru , then when the channel between the IRS and the second device is modeled as a Rice channel, h ru can be expressed as:

[0132]

[0133] In the above formula, k ru represents the Rice factor between the IRS and the second device; α ru represents the path loss coefficient between the IRS and the second device; g ru,LoS represents the third line-of-sight component between the IRS and the second device; g ru,NLoS represents the third non-line-of-sight component between the IRS and the second device.

[0134] In the embodiments of the present disclosure, it is assumed that the initial reflection phase shift of the IRS is θ i∈(0, 2π], where i is a positive integer greater than or equal to 1 and less than or equal to N, N is a positive integer greater than or equal to 1, N represents the number of reflection phase shift units of the IRS, diag() represents a diagonal matrix; the power of the first device, such as a communication device, is P, and the initial precoding matrix (which can also be called a beamforming vector) of the first device is ω; the first device sends a signal x to the second device, then the expression of the initial received signal Y received by the second device, such as a vehicle, can be:

[0135]

[0136] According to Shannon's theorem, the downlink ergodic capacity (which can also be called the downlink ergodic rate) between the first device and the second device can be expressed as:

[0137] E{log(1 + P||(h su + h ru Φh sr ))ω||)} (12)

[0138] In the above formula, E{} represents the expectation; || || represents the two-norm.

[0139] The goal of the algorithm solution is to maximize the downlink ergodic capacity of the system by optimizing the initial reflection phase shift of the IRS :

[0140]

[0141] Using the coordinate gradient descent algorithm, solving the above formula (13) can obtain the optimal solution of the IRS reflection phase shift as the target reflection phase shift Φ * , and then obtaining the target precoding matrix ω according to the MRT criterion * , ω * can be expressed as:

[0142]

[0143] In the above formula, H represents the conjugate transpose of the matrix.

[0144] In S150, the transmission signal processed by the target precoding matrix is sent to the second device through the intelligent reflecting surface adjusted to the target parameters.

[0145] The received signal received by the second device, such as a vehicle, mainly includes two paths. One path is directly transmitted by the first device, such as a communication device, and the other path is reflected by the IRS. That is, after the first device generates a transmission signal, it is first processed by the target precoding matrix and then transmitted. Part of it is directly transmitted to the second device, and the other part is reflected by the IRS to the second device. That is, the expression of the target received signal Y* received by the second device can be:

[0146]

[0147] By changing the target parameters of the IRS, such as the reflection coefficient, the amplitudes and phases of the transmitted signals x from the first device, such as the base station, can be superimposed in the same direction at the receiving end, i.e., the second device, the signal power is enhanced, and the communication quality is better.

[0148] On the one hand, the information transmission method provided by the embodiments of the present disclosure can determine the first channel state information between the first device and the second device by obtaining the first device information of the first device, the second device information of the second device, the obstacle information between the first device and the second device, and the first channel parameter between the first device and the second device, and then further according to the first device information, the second device information, the obstacle information and the first channel parameter. Thus, the first channel state information between the first device and the second device can be automatically adjusted by the obstacle information detected in real time between the first device and the second device communicating with each other, and the changing communication environment between the first device and the second device can be adapted. On the other hand, the target reflection phase shift of the intelligent reflecting surface and the target precoding matrix of the first device can also be determined according to the first channel state information between the first device and the second device determined above. Thus, the target parameters of the intelligent reflecting surface can be adjusted by using the configured target reflection phase shift. When the first device is ready to send a signal to the second device, the transmission signal to be sent to the second device can be first processed by the target precoding matrix, and then the transmission signal processed by the target precoding matrix is sent to the second device through the intelligent reflecting surface adjusted to the target parameters. Therefore, the reflection of the transmission signal can be enhanced by the intelligent reflecting surface, assisting the communication between the first device and the second device, and improving the communication quality between the first device and the second device.

[0149] Intelligent Transportation System (ITS), also known as Intelligent Traffic System, is an integrated transportation system that effectively combines advanced scientific and technological means (information technology, computer technology, data communication technology, sensor technology, electronic control technology, automatic control theory, operations research, artificial intelligence, etc.) in transportation, service control, and vehicle manufacturing, strengthening the connection among vehicles, roads, and users, thereby forming a comprehensive transportation system that ensures safety, improves efficiency, enhances the environment, and saves energy.

[0150] Intelligent Vehicle Infrastructure Cooperative Systems (IVICS), abbreviated as vehicle-road collaborative system, is a development direction of Intelligent Transportation System (ITS). The vehicle-road collaborative system adopts advanced wireless communication and new-generation Internet technologies to comprehensively implement dynamic real-time information interaction between vehicles and between vehicles and roads, and conducts active vehicle safety control and road collaborative management based on the acquisition and fusion of dynamic traffic information in the whole space-time, fully realizing the effective collaboration of people, vehicles, and roads, ensuring traffic safety, improving traffic efficiency, and thus forming a safe, efficient, and environmentally friendly road traffic system.

[0151] In the operation process of remotely controlling vehicles in intelligent transportation in related technologies, first, cameras or lidar installed on the roadside are used to collect the position and video information of vehicles in real time, and then the information is uploaded to the background for management and control by relevant technical personnel. The background transmits the analyzed and processed data to the radio frequency terminal of the vehicle by sending V2X (vehicle to everything, that is, vehicle's information exchange with the outside world) messages through communication devices, and then the vehicle completes corresponding technical actions.

[0152] However, the above-mentioned related technologies have at least the following problems:

[0153] First, in the vehicle-road collaborative scenario of intelligent transportation, the communication link between the vehicle and the communication device is easily blocked by obstacles, resulting in a reduced transmission rate and a decline in communication quality, which is not conducive to the remote control of intelligent transportation.

[0154] Second, in the vehicle-road collaborative scenario of intelligent transportation, since obstacles in the yard, such as containers, need to be unloaded and loaded periodically, the height of the obstacles is not fixed, and the communication environment between the vehicle and the communication device is variable, which is not conducive to configuring the reflection phase of the IRS. Instead, using the IRS assistance is likely to reduce the transmission rate.

[0155] The method provided in the embodiments of the present disclosure can be applied to the intelligent vehicle-road collaborative system in the intelligent transportation system. The following is combined with Figures 2 to 5To illustrate the information transmission method provided by the embodiments of the present disclosure, but not limited thereto.

[0156] Figure 2 FIG. schematically shows an application scenario diagram of an information transmission method according to an embodiment of the present disclosure.

[0157] As Figure 2 shown, assume that the second device is vehicle 201 and the first device is communication device 204. The intelligent reflecting surface IRS 202 may include an IRS controller 203.

[0158] Figure 2 In the embodiment, taking vehicle 201 as a heavy truck with autonomous driving function as an example, it may have the following functions:

[0159] It is equipped with in-vehicle sensing devices, which can monitor the position information, speed, acceleration, in-vehicle temperature, in-vehicle humidity, status of equipment entertainment facilities, etc. of vehicle 201;

[0160] It is equipped with a communication interaction module to achieve information interaction with communication device 204;

[0161] The communication interaction module is connected to the in-vehicle bus, and converts the instruction information sent by communication device 204 (the above-mentioned transmitted signal may include this instruction information) into an interaction instruction of a specific in-vehicle module. For example, according to the in-vehicle temperature and in-vehicle humidity sent by communication device 204 (set by remote server 310 according to the target travel request), adjust the in-vehicle temperature controller and humidity controller; according to the target departure place and target destination sent by communication device 204, perform route planning, and drive the vehicle driving-related module into the vehicle driving state;

[0162] It has autonomous driving capabilities and meets various performances required for autonomous driving.

[0163] Communication device 204 may have the following functions:

[0164] It is equipped with a communication module to achieve information interaction with vehicle 201, intelligent reflecting surface IRS 202 and IRS controller 203;

[0165] It has decision-making and scheduling functions, and can make correct decisions and scheduling according to the transportation equipment status information of each vehicle 201.

[0166] The intelligent reflecting surface IRS 202 can send and receive data to / from communication device 204 through IRS controller 203. For example, send the metadata received from vehicle 201 to communication device 204, and receive the configured target reflection phase shift from communication device 204.

[0167] Figure 3The embodiments are illustrated by taking the application scenarios of smart ports as examples.

[0168] As a transportation hub, ports play a crucial role in promoting international trade and regional development. Promoting the intelligent upgrade of ports can not only improve the work efficiency of ports themselves and reduce operating costs, but also have an important driving effect on the economy of surrounding areas. In a smart port, automated operations are completed by remotely controlling a truck with autonomous driving capabilities (also known as an unmanned truck) through manual control in the background, including a series of remote control operations such as yard crane transfer and container lifting and unloading. A smart port can also use drones to transmit real-time videos during dock inspections. The driver can be outside the truck and analyze the real-time videos transmitted back through AI (Artificial Intelligence) technology in the background to conduct real-time warning analysis of the behavior of unmanned trucks, etc.

[0169] See Figure 3 , which provides a system model diagram for improving communication capacity with the assistance of IRS in the scenario of intelligent transportation vehicle-road collaboration, including vehicles, obstacles, IRS, communication devices, and roadside sensing devices.

[0170] Since the number of obstacles in the yard, such as container 302, is constantly changing, the direct link between the vehicle, such as truck 301, and the communication device 303 is blocked during driving, seriously affecting the communication between the communication device 303 and the truck 301. Figure 3 In the embodiment, by installing IRS 306 on the building wall 307, line-of-sight communication can be provided for the communication device 303 and the truck 301 to assist in improving communication capacity.

[0171] Figure 3 In the embodiment, the transmitting end, i.e., the communication device 303, receives the metadata sent by the truck 301 (including receiving directly from the truck 301 and receiving through reflection by IRS 306) for adaptive channel estimation to obtain the first channel parameter, the second channel parameter, and the third channel parameter. Here, it is assumed that the truck 301 travels along the direction of the dotted arrow. It is assumed that at the first moment t1, the communication between the second position where the vehicle 301 is located and the communication device 303 is completely blocked by the container 302, and at the second moment t2, the communication between the second position of the truck 301 and the communication device 303 is not blocked by the obstacle 302 at all.

[0172] Figure 3In the embodiment, it is assumed that a roadside unit 305 is installed on the street lamp pole 304. The roadside unit 305 can be used to collect information such as the second position of the truck 301, the azimuth angle of the truck 301 relative to the container 302, and the first height of the container 302, and then send it to the communication device 303. The communication device 303 can determine whether the line-of-sight link between the truck 301 and the communication device 303 is completely blocked, partially blocked, or completely unblocked according to the information received from the roadside unit 305, so as to model the corresponding channel, such as one of the Rayleigh channel, the Rice channel, and the direct channel. According to the modeled corresponding channel, design a corresponding optimization algorithm to jointly optimize the initial precoding matrix of the communication device to obtain the target precoding matrix and the target reflection phase of the IRS, enhance the reflection of the transmission signal sent by the communication device 303 to the truck 301, and improve the communication quality between the communication device 303 and the truck 301.

[0173] As Figure 4 shown, a schematic flow chart of a method for improving communication capacity with the assistance of IRS in the intelligent transportation vehicle-road cooperation scenario is provided. The method provided by the embodiment of the present disclosure may include:

[0174] In S001, use roadside sensing devices to collect the position information (second position) of the vehicle and the height information (first height) of the obstacle.

[0175] In S001, the roadside sensing device can collect the shadow area of the obstacle projected on the ground, that is, the shadow area of the obstacle on the ground, so as to solve the shadow area to obtain the height and width information of the obstacle projected on the ground. For example, image recognition processing technology is used. Alternatively, the roadside sensing device can also directly collect the height and width information of the obstacle projected on the ground. The first height of the obstacle can be further obtained according to the height and width information of the obstacle projected on the ground. Alternatively, the roadside sensing device can also directly measure the first height of the obstacle, and the present disclosure does not limit this.

[0176] In S001, the roadside sensing device can also collect the azimuth angle information of the vehicle relative to the obstacle.

[0177] In S002, the roadside sensing device transmits the collected information to the communication device through, for example, an optical fiber / 4G / 5G link, etc., so that the communication device can perform relevant estimation tasks.

[0178] The estimation tasks in the embodiments of the present disclosure may include: the communication device determines whether the direct link between the vehicle and the communication device is completely blocked according to information such as the first height of the obstacle and the second position of the vehicle (optionally including the azimuth angle of the vehicle); after the communication device determines whether the direct link between the vehicle and the communication device is completely blocked, partially blocked or not blocked at all according to the information collected by the roadside sensing device, it models the corresponding channel and estimates the first channel state information, the second channel state information and the third channel state information to design the corresponding optimization algorithm.

[0179] In S101-S102, the communication device estimates channel-related parameters (including the first channel parameter, the second channel parameter and the third channel parameter) through an adaptive channel estimation algorithm.

[0180] In S101, the vehicle sends metadata, a part of which is directly received by the communication device, and the other part is reflected to the communication device by the IRS.

[0181] In S102, the communication device estimates the relevant channel parameters through an estimation algorithm.

[0182] The communication device estimates the relevant channel parameters through an adaptive channel estimation algorithm according to the received metadata. The second channel parameter includes the LoS channel matrix (the second line-of-sight component) and the NLoS channel covariance matrix (the second non-line-of-sight component) between the IRS and the communication device. The third channel parameter includes the LoS channel matrix (the third line-of-sight component) and the NLoS channel covariance matrix (the third non-line-of-sight component) between the IRS and the vehicle. The first channel parameter includes the LoS channel matrix (the first line-of-sight component) and the NLoS channel covariance matrix (the first non-line-of-sight component) between the communication device and the vehicle.

[0183] In the embodiments of the present disclosure, the metadata sent by the vehicle can be understood as the pilot information or reference signal sent by the vehicle side. The communication device, such as a base station, assumes a certain channel model according to the received pilot information and can estimate the parameters of the model and the relevant channel parameters through the relevant channel estimation algorithm.

[0184] In S201-S203, according to whether the first Fresnel zone of the communication device is blocked by terrain and ground objects, and the information collected by the roadside sensing device, including the second position of the vehicle, the first height and width information of the obstacle, and the distance information between the two communication locations (the first distance between the communication device and the vehicle), it is determined whether the vehicle is within the line-of-sight range of the communication device at the current moment.

[0185] In S201, if the second position of the vehicle is outside the visible area of the ground position of the communication device, and the first height of the obstacle is greater than threshold 1 and the first distance between the vehicle and the communication device is greater than threshold 2, it is determined that the line-of-sight link between the vehicle and the communication device is completely blocked, and then S301 - S304 are executed sequentially.

[0186] For example, in the scenario of a smart port, assume that the straight-line distance between the truck and the communication device is d = 20 meters, where the straight-line distance between the truck and the container is d1 = 10 meters, and the straight-line distance between the container and the communication device is d2 = 10 meters; the height of the truck is 2.5 meters, the height of the container is h2 meters, and the height of the communication device (assumed to be an RSU) is 5.5 meters, and the meteorological factor k = 0.25. The meteorological factor is affected by climate and environment, including temperature, air flow, humidity, air pressure, etc. Therefore, if the truck is outside the visible area of the ground position of the communication device, and it is determined according to the above formula (2) that h2 > (10 * 5.5 + 2.5 * (20 - 2.5)) / 20 = 11.5 meters, and it is determined according to the above formula (3) that d > 1.7d0, then 301 is executed at this time.

[0187] In S301, an optimization algorithm 1 is designed.

[0188] In S301, a channel model is first established. Since the LoS link between the communication device and the vehicle is blocked by an obstacle, the channel between the communication device and the vehicle follows a Rayleigh distribution; the channels between the communication device and the IRS, and between the IRS and the vehicle follow a Rice distribution. Secondly, according to Shannon's theorem, the expression of the downlink ergodic capacity is obtained, and then the optimization algorithm 1 is designed to calculate the target reflection phase shift and the target precoding matrix of the optimal IRS to maximize the downlink ergodic capacity. Then, the communication device processes the transmitted signal using the target precoding matrix, and then reflects it through the IRS that has been adjusted according to the target reflection phase shift, and the vehicle is responsible for receiving the signal.

[0189] For example, substituting the above formula (1) formula (9), formula (10) into formula (13) as the optimization algorithm 1, and solving to obtain the target reflection phase shift Φ * .

[0190] In S302, the IRS reflection phase shift is configured.

[0191] The communication device will send the target reflection phase shift Φ designed according to S301 * to the IRS controller. The IRS controller receives the target reflection phase shift Φ * , adjusts the relevant parameters of the passive components built into the IRS, and obtains the target parameters to control its amplitude and phase independent reflected signals.

[0192] In S303, the target reflection phase shift Φ designed according to MRT and S301 * Generate the target precoding matrix ω * .

[0193] The target reflection phase shift of the IRS designed according to the optimization algorithm 1 can obtain the equivalent channel of the downlink between the first device and the second device. The equivalent channel of the downlink includes the superposition of two links. One is the direct channel directly from the communication device to the vehicle, and the other is the reflected channel through the IRS. Therefore, the equivalent channel is related to the target reflection phase shift of the IRS). At this time, the transmitted signal is precoded according to the target precoding matrix, and the signal is transmitted according to the MRT mechanism. Among them, the design of the target precoding matrix of the transmitted signal can be designed by the matched filtering method.

[0194] In S304, signal transmission.

[0195] In S304, the communication device generates the transmitted signal x. After being processed by the target precoding matrix obtained in S303, it is transmitted, reflected by the IRS to the vehicle, and the vehicle receives the target received signal.

[0196] In S202, if the vehicle is within the visible area of the ground position of the communication device, and the first height of the obstacle is less than the threshold 3, and the first distance between the vehicle and the communication device is less than the threshold 4, it is determined that the vehicle is completely within the line-of-sight range of the communication device, and S501 is executed subsequently.

[0197] For example, in the smart port scenario, if the container truck is outside the visible area of the ground position of the communication device, and it is determined according to the above formula (6) that h2 < 10 * 5.5 / 20 = 2.75 meters, and it is determined according to the above formula (7) that d < 0.7d0, then S501 is executed at this time.

[0198] In S501, design the optimization algorithm 3.

[0199] First, establish a channel model. Since the vehicle is completely within the line-of-sight range of the communication device and the LoS link between the communication device and the vehicle is dominant, the channel between the communication device and the vehicle is modeled as a direct channel; the channels between the communication device and the IRS, and between the IRS and the vehicle follow the Rice distribution. Secondly, according to Shannon's theorem, the expression of the downlink ergodic capacity is obtained, and the optimization algorithm 3 is designed to calculate the optimized target reflection phase shift of the IRS to maximize the downlink ergodic capacity.

[0200] For example, substitute the above formula (5) Formula (9) and formula (10) into formula (13) as the optimization algorithm 3 to solve for the target reflection phase shift Φ * .

[0201] In S502, configure the IRS reflection phase shift.

[0202] S502 adjusts the relevant parameters of the passive components built in the IRS according to the target reflection phase shift of the IRS designed in S501, and controls the reflection signals with independent amplitude and phase.

[0203] In S503, design the target precoding matrix according to MRT.

[0204] S503 generates the target precoding matrix according to MRT and the target reflection phase shift of the IRS designed in S501.

[0205] In S504, signal transmission.

[0206] S504 processes the transmitted signal according to the target precoding matrix obtained in S503, and then transmits the signal.

[0207] In S203, except for the situations described in S201 and S202, it can be determined that there are obstacles between the vehicle and the communication device that can partially affect signal propagation. For example, signal attenuation caused by tall trees blocking, then execute S401.

[0208] In S401, design the optimization algorithm 2.

[0209] First, establish a channel model. Since part of the vehicle is within the line-of-sight range of the communication device, the channel between the communication device and the vehicle is modeled as a Rice channel; the channels between the communication device and the IRS, and between the IRS and the vehicle follow the Rice distribution. Secondly, according to Shannon's theorem, obtain the expression of the downlink ergodic capacity, and design the optimization algorithm 2 to calculate the target reflection phase shift of the optimized IRS to maximize the downlink ergodic capacity for processing the transmitted signal, and the vehicle is responsible for receiving the signal.

[0210] For example, substitute the above formulas (8), (9), and (10) into formula (13) as the optimization algorithm 2 to solve for the target reflection phase shift Φ * .

[0211] In S402, configure the IRS reflection phase shift.

[0212] S402 adjusts the relevant parameters of the passive components built in the IRS according to the target reflection phase shift of the IRS designed in S401, and controls the reflection signals with independent amplitude and phase.

[0213] In S403, design the target precoding matrix according to MRT.

[0214] S403 generates the target precoding matrix according to the MRT criterion and the target reflection phase shift of the IRS designed in S401.

[0215] In S404, signal transmission.

[0216] S404 processes the transmitted signal according to the target precoding matrix obtained in S403, and then transmits the signal.

[0217] In S601, according to S304, S404, and S504, the transmitted signal reaches the vehicle (receiver) through the direct path and the reflected path passing through the IRS. The vehicle receives the signal through the built-in receiver, completing the entire communication process.

[0218] In the embodiments of the present disclosure, the channel distribution between the communication device and the vehicle changes correspondingly due to the change of the third position and the first height of the obstacle. The downlink ergodic capacity refers to the average of multiple instantaneous capacities. In this way, the channel distribution between the communication device and the vehicle will affect the form of the expression of the downlink ergodic capacity, and further affect the optimization of the target reflection phase shift of the subsequent IRS and the design of the target precoding matrix.

[0219] The method provided by the embodiments of the present disclosure can be applied to the scenario of vehicle-road cooperation in intelligent transportation. By using an intelligent reflecting surface to assist in improving communication capacity, information such as the position of the vehicle and the height of the obstacle is obtained by using roadside sensing devices. After obtaining the information, the roadside sensing devices transmit it to the communication device through 5G / fiber optic links, etc.; part of the metadata sent by the vehicle is directly received by the communication device, and the other part is reflected to the communication device by the IRS. The communication device estimates the relevant channel parameters through an adaptive channel estimation algorithm, and judges whether the direct link between the vehicle and the communication device is completely blocked based on information such as the obstacle height, vehicle position, and vehicle azimuth angle. Thus, by designing a corresponding optimization algorithm, the target reflection phase shift of the IRS can be configured, and then the target precoding matrix can be designed according to MRT. The signal sent by the communication device is received by the vehicle, completing the entire communication process.

[0220] The method provided by the embodiments of the present disclosure deploys and configures an IRS on the surface of fixed buildings such as intersections, combines the data collected by roadside sensing devices such as cameras, lidars, millimeter-wave radars, etc., to assist the communication between the communication device and the vehicle, uses the roadside sensing devices to sense the dynamic changes of obstacles in real time, determines whether the vehicle is blocked by obstacles, and selects different modeled channels according to different occlusion situations. For example, when it is detected that the height of the obstacle changes, the corresponding modeled channel can be adjusted in real time for adaptively estimating the second channel state information between the communication device and the IRS, the third channel state information between the IRS and the vehicle, and the first channel state information between the communication device and the vehicle. Thus, corresponding optimization algorithms can be designed to adjust the target reflection phase shift of the IRS in real time to enhance the reflection of signals and improve the communication quality between the vehicle and the communication device, while meeting the highly automated requirements of intelligent transportation unmanned vehicles such as unmanned container trucks.

[0221] Figure 5 Schematically shows an application scenario diagram of an information transmission method according to another embodiment of the present disclosure. Figure 5 The difference between the embodiment and Figure 3 the embodiment is that by using the IRS 306 carried by the UAV 501 in the air above the road, a channel model between the communication device 303 and the vehicle 301 is established, and a corresponding optimization algorithm is designed to configure the target reflection phase shift of the IRS to improve the downlink ergodic capacity of the system.

[0222] The UAV relay communication system is a communication system with the UAV as a mobile relay. With its high mobility, it has the advantages of long transmission distance, convenient deployment, flexibility, wide coverage, rapid system architecture, and high economic benefits. The UAV can be used to achieve high-speed wireless communication and will play an important role in future communication systems. The UAV 501 can stay stationary in the air above the road or adjust its staying position according to the actual situation.

[0223] Figure 6 Schematically shows a flowchart of an information transmission method according to another embodiment of the present disclosure. Figure 6 The method provided by the embodiment is illustrated by taking the execution of the second device as an example.

[0224] As Figure 6 shown, the method provided by the embodiments of the present disclosure may include:

[0225] In S610, metadata is sent so that the first device can receive the metadata sent by the second device from the second device, and receive the metadata sent by the second device through the intelligent reflecting surface, and perform channel estimation processing based on the metadata received from the second device and the metadata received from the intelligent reflecting surface, to obtain the first channel parameter between the first device and the second device, the second channel parameter between the first device and the intelligent reflecting surface, and the third channel parameter between the intelligent reflecting surface and the second device.

[0226] In S620, the transmitted signal processed by the target precoding matrix sent by the first device is received through the intelligent reflecting surface adjusted to the target parameter.

[0227] Wherein, the first device is used to obtain the first device information of the first device, the second device information of the second device, and the obstacle information between the first device and the second device, determine the first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information and the first channel parameter, obtain the second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter, obtain the third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter, and determine the target reflection phase shift and the target precoding matrix of the intelligent reflecting surface according to the first channel state information, the second channel state information and the third channel state information, and the target reflection phase shift is used to determine the target parameter of the intelligent reflecting surface.

[0228] Figure 6 For other content of the embodiment, reference may be made to the description of the above other embodiments.

[0229] Figure 7 The flowchart of an information transmission method according to another embodiment of the present disclosure is schematically shown. Figure 7 The method provided by the embodiment is exemplified by being executed by a roadside unit.

[0230] As Figure 7 shown, the method provided by the embodiment of the present disclosure may include:

[0231] In S710, the second device information of the second device and the obstacle information between the first device and the second device are collected.

[0232] In S720, the second device information and the obstacle information are sent to the first device.

[0233] Among them, the first device is used to obtain the first device information of the first device, obtain the first channel parameter between the first device and the second device, the second channel parameter between the first device and the intelligent reflecting surface, and the third channel parameter between the intelligent reflecting surface and the second device. According to the first device information, the second device information, the obstacle information, and the first channel parameter, determine the first channel state information between the first device and the second device. Obtain the second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter, and obtain the third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter. Determine the target reflection phase shift of the intelligent reflecting surface and the target precoding matrix of the first device according to the first channel state information, the second channel state information, and the third channel state information. The target reflection phase shift is used to determine the target parameters of the intelligent reflecting surface, and send the transmission signal processed by the target precoding matrix to the second device through the intelligent reflecting surface adjusted to the target parameters.

[0234] Figure 7 For other contents of the embodiment, reference may be made to the descriptions of the above other embodiments.

[0235] Figure 8 Schematically shows a flowchart of an information transmission method according to another embodiment of the present disclosure. Figure 8 The method provided by the embodiment is illustrated by taking the execution of an intelligent reflecting surface as an example.

[0236] As Figure 8 shown, the method provided by the embodiments of the present disclosure may include:

[0237] In S810, receive the metadata sent by the second device.

[0238] In S820, the metadata received from the second device is sent to the first device so that the first device performs channel estimation processing based on the metadata received from the second device and the metadata received from the intelligent reflecting surface, to obtain a first channel parameter between the first device and the second device, a second channel parameter between the first device and the intelligent reflecting surface, and a third channel parameter between the intelligent reflecting surface and the second device. The first device is used to obtain first device information of the first device, second device information of the second device, and obstacle information between the first device and the second device, determine first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter, obtain second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter, obtain third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter, and determine a target reflection phase shift of the intelligent reflecting surface and a target precoding matrix of the first device according to the first channel state information, the second channel state information, and the third channel state information.

[0239] In S830, target parameters of the intelligent reflecting surface are determined according to the target reflection phase shift.

[0240] In S840, the transmitted signal processed by the target precoding matrix sent by the first device is received.

[0241] In S850, the transmitted signal processed by the target precoding matrix is processed by using the target parameters of the intelligent reflecting surface and sent to the second device.

[0242] Figure 8 Other contents of the embodiment may refer to the descriptions of the above other embodiments.

[0243] Figure 9 The block diagram of a first device according to an embodiment of the present disclosure is schematically shown. As Figure 9 shown, the first device 900 provided by the embodiment of the present disclosure may include an acquisition unit 910, a determination unit 920, and a transmission unit 930.

[0244] The acquisition unit 910 may be used to acquire first device information of the first device, second device information of the second device, and obstacle information between the first device and the second device.

[0245] The acquisition unit 910 may also be used to acquire a first channel parameter between the first device and the second device.

[0246] The determination unit 920 can be used to determine the first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter.

[0247] The determination unit 920 can also be used to determine the target reflection phase shift of the intelligent reflecting surface and the target precoding matrix of the first device according to the first channel state information, and the target reflection phase shift can be used to determine the target parameters of the intelligent reflecting surface.

[0248] The transmission unit 930 can be used to transmit the transmitted signal processed by the target precoding matrix to the second device through the intelligent reflecting surface adjusted to the target parameters.

[0249] In an exemplary embodiment, the first device information may include the ground position visible area of the first device and the first position; the second device information may include the second position of the second device; the obstacle information may include the first height of the obstacle; and the first channel parameter may include the first non-line-of-sight component between the first device and the second device.

[0250] Among them, the determination unit 920 may include: a first distance determination unit, which can be used to determine the first distance between the first device and the second device according to the first position and the second position; a first channel state information acquisition unit, which can be used to obtain the first channel state information between the first device and the second device according to the first non-line-of-sight component if it is determined according to the second position that the second device is outside the ground position visible area, the first height is greater than the first threshold, and the first distance is greater than the second threshold.

[0251] In an exemplary embodiment, the first device information may further include the second height of the first device; the second device information may further include the third height of the second device; and the obstacle information may further include the third position of the obstacle.

[0252] Among them, the first device 900 may further include: a second distance acquisition unit, which can be used to obtain the second distance between the second device and the obstacle according to the second position and the third position; a first threshold determination unit, which can be used to determine the first threshold according to the second distance, the second height, the third height, and the first distance.

[0253] In an exemplary embodiment, the first device information may further include a second height of the first device; the second device information may further include a third height of the second device. Wherein, the first device 900 may further include: a first distance factor obtaining unit, configured to obtain a first distance factor and a meteorological factor; a second threshold determining unit, configured to determine the second threshold according to the first distance factor, the meteorological factor, the third height, and the second height.

[0254] In an exemplary embodiment, the first device information may include a ground position visible area of the first device, and a first position; the second device information may include a second position of the second device; the obstacle information may include a first height of the obstacle; the first channel parameter may include a first line-of-sight component between the first device and the second device.

[0255] Wherein, the determining unit 920 may include: a first distance obtaining unit, configured to determine a first distance between the first device and the second device according to the first position and the second position; a first channel state information obtaining unit, configured to, if it is determined according to the second position that the second device is within the ground position visible area, the first height is less than a third threshold, and the first distance is less than a fourth threshold, obtain first channel state information between the first device and the second device according to the first line-of-sight component.

[0256] In an exemplary embodiment, the first device information may further include a second height of the first device; the obstacle information may further include a third position of the obstacle.

[0257] Wherein, the first device 900 may further include: a second distance obtaining unit, configured to obtain a second distance between the second device and the obstacle according to the second position and the third position; a third threshold determining unit, configured to determine the third threshold according to the second distance, the second height, and the first distance.

[0258] In an exemplary embodiment, the first device information may further include a second height of the first device; the second device information may further include a third height of the second device.

[0259] Wherein, the first device 900 may further include: a second distance factor obtaining unit, configured to obtain a second distance factor and a meteorological factor; a fourth threshold determining unit, configured to determine the fourth threshold according to the second distance factor, the meteorological factor, the third height, and the second height.

[0260] In an exemplary embodiment, the first device information may include the ground position visible area of the first device and a first position; the second device information may include a second position of the second device; the obstacle information may include a first height of the obstacle; the first channel parameter may include a first line-of-sight component and a first non-line-of-sight component between the first device and the second device.

[0261] Wherein, the determining unit 920 may include: a first distance determining unit, configured to determine a first distance between the first device and the second device according to the first position and the second position; a first channel state information confirmation unit, configured to if it is determined according to the second position that the second device is outside the ground position visible area, and the first height is less than or equal to a first threshold, or the first distance is less than or equal to a second threshold; or, if it is determined according to the second position that the second device is inside the ground position visible area, and the first height is greater than or equal to a third threshold, or the first distance is greater than or equal to a fourth threshold, then obtain first channel state information between the first device and the second device according to the first line-of-sight component and the first non-line-of-sight component.

[0262] In an exemplary embodiment, the obtaining unit 910 may further be configured to obtain a second channel parameter between the first device and the intelligent reflecting surface, and a third channel parameter between the intelligent reflecting surface and the second device. The determining unit 920 may include: a second channel state information determining unit, configured to obtain second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter; a third channel state information determining unit, configured to obtain third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter; a downlink ergodic capacity obtaining unit, configured to obtain a downlink ergodic capacity between the first device and the second device according to the first channel state information, the second channel state information, and the third channel state information; a target reflection phase shift determining unit, configured to determine the target reflection phase shift according to the downlink ergodic capacity; a target precoding matrix obtaining unit, configured to obtain the target precoding matrix according to the first channel state information, the second channel state information, the third channel state information, and the target reflection phase shift.

[0263] In an exemplary embodiment, the second channel parameter may include a second line-of-sight component and a second non-line-of-sight component between the first device and the intelligent reflecting surface; the third channel parameter may include a third line-of-sight component and a third non-line-of-sight component between the intelligent reflecting surface and the second device.

[0264] In an exemplary embodiment, the obtaining unit 910 may include: a first metadata receiving unit, which may be configured to receive the metadata sent by the second device from the second device; a second metadata receiving unit, which may be configured to receive the metadata sent by the second device through the intelligent reflecting surface; and a channel estimation unit, which may be configured to perform channel estimation processing based on the metadata received from the second device and the metadata received from the intelligent reflecting surface, to obtain the first channel parameter, the second channel parameter, and the third channel parameter.

[0265] In an exemplary embodiment, the obtaining unit 910 may include: a device obstacle information receiving unit, which may be configured to receive the second device information and the obstacle information from the roadside unit.

[0266] The specific implementation of each unit in the first device provided in the embodiments of the present disclosure may refer to the content in the above information transmission method, and will not be elaborated herein.

[0267] Figure 10 A block diagram of a second device according to an embodiment of the present disclosure is schematically shown. As Figure 10 shown, the second device provided in the embodiments of the present disclosure may include a sending unit 1010 and a receiving unit 1020.

[0268] The sending unit 1010 may be configured to send metadata, so that the first device can receive the metadata sent by the second device from the second device, and receive the metadata sent by the second device through the intelligent reflecting surface, and perform channel estimation processing based on the metadata received from the second device and the metadata received from the intelligent reflecting surface, to obtain the first channel parameter between the first device and the second device, the second channel parameter between the first device and the intelligent reflecting surface, and the third channel parameter between the intelligent reflecting surface and the second device.

[0269] The receiving unit 1020 may be configured to receive the transmitted signal processed by the target precoding matrix sent by the first device through the intelligent reflecting surface adjusted to the target parameter.

[0270] Among them, the first device can be used to obtain the first device information of the first device, the second device information of the second device, and the obstacle information between the first device and the second device, determine the first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter, obtain the second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter, obtain the third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter, and determine the target reflection phase shift and the target precoding matrix of the intelligent reflecting surface according to the first channel state information, the second channel state information, and the third channel state information, where the target reflection phase shift is used to determine the target parameter of the intelligent reflecting surface.

[0271] The specific implementation of each unit in the second device provided in the embodiments of the present disclosure can refer to the content in the above information transmission method and will not be elaborated here.

[0272] Figure 11 Schematically shows a block diagram of a roadside unit according to an embodiment of the present disclosure. As Figure 11 shown, the roadside unit 1100 provided in the embodiments of the present disclosure may include: an acquisition unit 1110 and a transmission unit 1120.

[0273] The acquisition unit 1110 can be used to acquire the second device information of the second device and the obstacle information between the first device and the second device.

[0274] The transmission unit 1120 can be used to send the second device information and the obstacle information to the first device.

[0275] Among them, the first device can be used to obtain the first device information of the first device, obtain the first channel parameter between the first device and the second device, the second channel parameter between the first device and the intelligent reflecting surface, and the third channel parameter between the intelligent reflecting surface and the second device, determine the first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information and the first channel parameter, obtain the second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter, obtain the third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter, determine the target reflection phase shift of the intelligent reflecting surface and the target precoding matrix of the first device according to the first channel state information, the second channel state information and the third channel state information, where the target reflection phase shift is used to determine the target parameter of the intelligent reflecting surface, and send the transmitted signal processed by the target precoding matrix to the second device through the intelligent reflecting surface adjusted to the target parameter.

[0276] The specific implementation of each unit in the roadside unit provided by the embodiments of the present disclosure can refer to the content in the above information transmission method, which will not be elaborated here.

[0277] Figure 12 Schematically shows a block diagram of an intelligent reflecting surface according to an embodiment of the present disclosure. As Figure 12 shown, the intelligent reflecting surface 1200 provided by the embodiments of the present disclosure may include: a receiving unit 1210, a reflecting unit 1220, and an adjusting unit 1230.

[0278] The receiving unit 1210 can be used to receive the metadata sent by the second device.

[0279] The reflection unit 1220 can be used to send the metadata received from the second device to the first device, so that the first device can perform channel estimation processing based on the metadata received from the second device and the metadata received from the intelligent reflecting surface, and obtain the first channel parameter between the first device and the second device, the second channel parameter between the first device and the intelligent reflecting surface, and the third channel parameter between the intelligent reflecting surface and the second device. The first device is used to obtain the first device information of the first device, the second device information of the second device, and the obstacle information between the first device and the second device, determine the first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter, obtain the second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter, obtain the third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter, and determine the target reflection phase shift of the intelligent reflecting surface and the target precoding matrix of the first device according to the first channel state information, the second channel state information, and the third channel state information.

[0280] The adjustment unit 1230 can be used to determine the target parameters of the intelligent reflecting surface according to the target reflection phase shift.

[0281] The receiving unit 1210 can also be used to receive the transmission signal processed by the target precoding matrix sent by the first device.

[0282] The reflection unit 1220 can also be used to process the transmission signal processed by the target precoding matrix by using the target parameters of the intelligent reflecting surface and send it to the second device.

[0283] The specific implementation of each unit in the intelligent reflecting surface provided by the embodiments of the present disclosure can refer to the content in the above information transmission method, and will not be elaborated here.

[0284] Figure 13 The structural schematic diagram of the electronic device suitable for implementing the embodiments of the present disclosure is shown.

[0285] It should be noted that Figure 13 The shown electronic device 100 is only an example, and should not bring any limitation to the functions and usage scope of the embodiments of the present disclosure. The electronic device 100 can be, for example, any one or a combination of the communication devices, vehicles, IRSs, RSU, etc. in the above embodiments.

[0286] Such as Figure 13As shown, the electronic device 100 includes a central processing unit (CPU) 101, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 102 or the program loaded from the storage section 108 into the random access memory (RAM) 103. In the RAM 103, various programs and data required for system operation are also stored. The CPU 101, ROM 102, and RAM 103 are connected to each other via a bus 104. The input / output (I / O) interface 105 is also connected to the bus 104.

[0287] The following components are connected to the I / O interface 105: an input section 106 including a keyboard, a mouse, etc.; an output section 107 including, for example, a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 108 including a hard disk, etc.; and a communication section 109 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 109 performs communication processing via a network such as the Internet. The drive 110 is also connected to the I / O interface 105 as needed. A removable medium 111, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 110 as needed so that a computer program read from it can be installed into the storage section 108 as needed.

[0288] Specifically, according to an embodiment of the present disclosure, the processes described below with reference to the flowcharts can be implemented as computer software programs. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a computer-readable storage medium, and the computer program includes program codes for performing the methods shown in the flowcharts. In such an embodiment, the computer program can be downloaded and installed from the network via the communication section 109, and / or installed from the removable medium 111. When the computer program is executed by the central processing unit (CPU) 101, various functions defined in the methods and / or devices of the present application are executed.

[0289] It should be noted that the computer-readable storage medium shown in the present disclosure can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above.

[0290] As another aspect, the present application also provides a computer-readable storage medium, which may be included in the electronic device described in the above embodiments; or may exist alone without being assembled into the electronic device. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed by an electronic device, the electronic device implements the method described in the following embodiments. For example, the electronic device may implement the method as shown in Figure 1 or Figure 4 or Figure 6 or Figure 7 or Figure 8 shown. The technical solution according to the embodiment of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (such as a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on the network, and includes several instructions to enable a computing device (such as a personal computer, a server, a touch terminal, or a network device, etc.) to execute the method according to the embodiment of the present disclosure.

Claims

1. An information transmission method, characterized in that, The method is executed by a first device; wherein, the method includes: Obtain first device information of the first device, second device information of a second device, and obstacle information between the first device and the second device, where the first device information includes a ground position visible area of the first device and a first position; the second device information includes a second position of the second device; and the obstacle information includes a first height of the obstacle; Obtain a first channel parameter between the first device and the second device; Determine first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter; Determine a target reflection phase shift of an intelligent reflecting surface and a target precoding matrix of the first device according to the first channel state information, where the target reflection phase shift is used to determine target parameters of the intelligent reflecting surface; Transmit a transmission signal processed by the target precoding matrix to the second device through the intelligent reflecting surface adjusted to the target parameters.

2. The method according to claim 1, characterized in that, The first channel parameter includes a first non-line-of-sight component between the first device and the second device; Wherein, determining the first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter includes: Determine a first distance between the first device and the second device according to the first position and the second position; If it is determined according to the second position that the second device is outside the ground position visible area, the first height is greater than a first threshold, and the first distance is greater than a second threshold, then obtain the first channel state information between the first device and the second device according to the first non-line-of-sight component.

3. The method according to claim 2, characterized in that, The first device information further includes a second height of the first device; The second device information further includes a third height of the second device; The obstacle information further includes a third position of the obstacle; Wherein, the method further includes: Obtain a second distance between the second device and the obstacle according to the second position and the third position; Determine the first threshold according to the second distance, the second height, the third height, and the first distance.

4. The method according to claim 2, characterized in that, The first device information further includes a second height of the first device; The second device information further includes a third height of the second device; Wherein, the method further includes: Obtain a first distance factor and a meteorological factor; Determine the second threshold according to the first distance factor, the meteorological factor, the third height, and the second height.

5. The method according to claim 1, characterized in that, The first channel parameter includes a first line-of-sight component between the first device and the second device; Wherein, determining the first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter includes: Determine a first distance between the first device and the second device according to the first position and the second position; If it is determined according to the second position that the second device is within the visible area of the ground position, the first height is less than a third threshold, and the first distance is less than a fourth threshold, then the first channel state information between the first device and the second device is obtained according to the first line-of-sight component.

6. The method according to claim 5, characterized in that, The first device information further includes a second height of the first device; The obstacle information further includes a third position of the obstacle; Wherein, the method further includes: Obtaining a second distance between the second device and the obstacle according to the second position and the third position; Determining the third threshold according to the second distance, the second height, and the first distance.

7. The method according to claim 5, characterized in that, The first device information further includes a second height of the first device; The second device information further includes a third height of the second device; Wherein, the method further includes: Obtaining a second distance factor and a meteorological factor; Determining the fourth threshold according to the second distance factor, the meteorological factor, the third height, and the second height.

8. The method according to claim 1, wherein The first channel parameter includes a first line-of-sight component and a first non-line-of-sight component between the first device and the second device; Wherein, determining the first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter includes: Determining a first distance between the first device and the second device according to the first position and the second position; If it is determined according to the second position that the second device is outside the visible area of the ground position, and the first height is less than or equal to a first threshold, or the first distance is less than or equal to a second threshold; or, if it is determined according to the second position that the second device is within the visible area of the ground position, and the first height is greater than or equal to a third threshold, or the first distance is greater than or equal to a fourth threshold, then the first channel state information between the first device and the second device is obtained according to the first line-of-sight component and the first non-line-of-sight component.

9. The method according to claim 1, wherein Determining a target reflection phase shift of the intelligent reflecting surface and a target precoding matrix of the first device according to the first channel state information between the first device and the second device includes: Obtaining a second channel parameter between the first device and the intelligent reflecting surface, and a third channel parameter between the intelligent reflecting surface and the second device; Obtaining a second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter; Obtaining a third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter; Obtaining a downlink ergodic capacity between the first device and the second device according to the first channel state information, the second channel state information, and the third channel state information; Determining the target reflection phase shift according to the downlink ergodic capacity; Obtaining the target precoding matrix according to the first channel state information, the second channel state information, the third channel state information, and the target reflection phase shift.

10. The method according to claim 9, wherein The second channel parameter includes a second line-of-sight component and a second non-line-of-sight component between the first device and the intelligent reflecting surface; The third channel parameter includes a third line-of-sight component and a third non-line-of-sight component between the intelligent reflecting surface and the second device.

11. The method according to claim 9, wherein Obtaining a first channel parameter between the first device and the second device, a second channel parameter between the first device and the intelligent reflecting surface, and a third channel parameter between the intelligent reflecting surface and the second device includes: Receiving metadata sent by the second device from the second device; Receiving metadata sent by the second device through the intelligent reflecting surface; Performing channel estimation processing based on the metadata received from the second device and the metadata received from the intelligent reflecting surface to obtain the first channel parameter, the second channel parameter, and the third channel parameter.

12. The method according to claim 1, wherein Obtaining second device information of the second device and obstacle information between the first device and the second device includes: Receiving the second device information and the obstacle information from a roadside unit.

13. An information transmission method, wherein The method is executed by a second device; wherein, the method includes: Sending metadata to facilitate the first device to receive the metadata sent by the second device from the second device and receive the metadata sent by the second device through the intelligent reflecting surface, and performing channel estimation processing based on the metadata received from the second device and the metadata received from the intelligent reflecting surface to obtain a first channel parameter between the first device and the second device, a second channel parameter between the first device and the intelligent reflecting surface, and a third channel parameter between the intelligent reflecting surface and the second device; Receiving a transmitted signal processed by a target precoding matrix sent by the first device through the intelligent reflecting surface adjusted to target parameters; Wherein, the first device is configured to obtain first device information of the first device, second device information of the second device, and obstacle information between the first device and the second device, determine first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter, obtain second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter, obtain third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter, and determine a target reflection phase shift and the target precoding matrix of the intelligent reflecting surface according to the first channel state information, the second channel state information, and the third channel state information, and the target reflection phase shift is used to determine the target parameter of the intelligent reflecting surface; the first device information includes a ground position visible area of the first device and a first position; the second device information includes a second position of the second device; the obstacle information includes a first height of the obstacle.

14. An information transmission method, wherein The method is executed by a roadside unit; wherein, the method includes: Collect the second device information of the second device and the obstacle information between the first device and the second device; Send the second device information and the obstacle information to the first device; Wherein, the first device is configured to obtain the first device information of the first device, obtain the first channel parameter between the first device and the second device, the second channel parameter between the first device and the intelligent reflecting surface, and the third channel parameter between the intelligent reflecting surface and the second device, determine the first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information and the first channel parameter, obtain the second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter, obtain the third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter, determine the target reflection phase shift of the intelligent reflecting surface and the target precoding matrix of the first device according to the first channel state information, the second channel state information and the third channel state information, the target reflection phase shift is used to determine the target parameters of the intelligent reflecting surface, and send the transmitted signal processed by the target precoding matrix to the second device through the intelligent reflecting surface adjusted to the target parameters; the first device information includes the ground position visible area of the first device and the first position; the second device information includes the second position of the second device; the obstacle information includes the first height of the obstacle.

15. An information transmission method, wherein The method is executed by an intelligent reflecting surface; wherein, the method includes: Receive the metadata sent by the second device; Send the metadata received from the second device to the first device so that the first device can perform channel estimation processing based on the metadata received from the second device and the metadata received from the intelligent reflecting surface, and obtain the first channel parameter between the first device and the second device, the second channel parameter between the first device and the intelligent reflecting surface, and the third channel parameter between the intelligent reflecting surface and the second device. The first device is used to obtain the first device information of the first device, the second device information of the second device, and the obstacle information between the first device and the second device, and determine the first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter. Obtain the second channel state information between the first device and the intelligent reflecting surface according to the second channel parameter, obtain the third channel state information between the intelligent reflecting surface and the second device according to the third channel parameter, and determine the target reflection phase shift of the intelligent reflecting surface and the target precoding matrix of the first device according to the first channel state information, the second channel state information, and the third channel state information; the first device information includes the ground position visible area of the first device and the first position; the second device information includes the second position of the second device; the obstacle information includes the first height of the obstacle. Determine the target parameters of the intelligent reflecting surface according to the target reflection phase shift; Receive the transmitted signal processed by the target precoding matrix sent by the first device; Process the transmitted signal processed by the target precoding matrix by using the target parameters of the intelligent reflecting surface and send it to the second device.

16. A first device, characterized in that, Includes: An acquisition unit for acquiring the first device information of the first device, the second device information of the second device, and the obstacle information between the first device and the second device. The first device information includes the ground position visible area of the first device and the first position; the second device information includes the second position of the second device; the obstacle information includes the first height of the obstacle. The acquisition unit is further configured to acquire the first channel parameter between the first device and the second device; A determination unit for determining the first channel state information between the first device and the second device according to the first device information, the second device information, the obstacle information, and the first channel parameter; The determination unit is further configured to determine the target reflection phase shift of the intelligent reflecting surface and the target precoding matrix of the first device according to the first channel state information, and the target reflection phase shift is used to determine the target parameters of the intelligent reflecting surface; A transmission unit for sending the transmitted signal processed by the target precoding matrix to the second device through the intelligent reflecting surface adjusted to the target parameters.

17. An electronic device, characterized in that, Includes: One or more processors; A storage device configured to store one or more programs which, when executed by one or more processors, cause the one or more processors to implement the method according to any one of claims 1 to 12, or the method according to claim 13, or the method according to claim 14, or the method according to claim 15.

18. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method according to any one of claims 1 to 12, or the method according to claim 13, or the method according to claim 14, or the method according to claim 15.

19. A computer program product comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the method according to any one of claims 1 to 12; or, The method according to claim 13; or, The method according to claim 14; or, the method according to claim 15.

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