CN115968016A

CN115968016A - Information transmission method and related equipment

Info

Publication number: CN115968016A
Application number: CN202111192539.8A
Authority: CN
Inventors: 贾宇航; 韩云博; 张云飞
Original assignee: Tencent Technology Shenzhen Co Ltd
Current assignee: Tencent Technology Shenzhen Co Ltd
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2023-04-14

Abstract

The disclosure provides an information transmission method and related equipment. The method performed by the first device comprises: acquiring first equipment information of first equipment, second equipment information of second equipment and obstacle information between the first equipment and the second equipment; acquiring a first channel parameter between first equipment and second equipment; 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 the intelligent reflection surface and a target precoding matrix of the first device according to the first channel state information, wherein the target reflection phase shift is used for determining a target parameter of the intelligent reflection surface; and sending the sending signal processed by the target precoding matrix to the second equipment through the intelligent reflecting surface adjusted to the target parameter. The communication capacity between the first device and the second device can be increased. The embodiment of the disclosure can be applied to the field of traffic.

Description

Information transmission method and related equipment

Technical Field

The present disclosure relates to the field of communications 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

In a wireless communication environment, different devices that communicate with each other, such as a first device and a second device, are easily blocked by obstacles, so that a transmission rate is reduced, communication quality is degraded, and information transmission between the first device and the second device is not facilitated.

Disclosure of Invention

The disclosed embodiments provide an information transmission method, a first device, an electronic device, a computer-readable storage medium, and a computer program product, which can improve communication quality between the first device and a second device.

The embodiment of the disclosure provides an information transmission method, which is executed by a first device. Wherein, the method comprises the following steps: acquiring first equipment information of the first equipment, second equipment information of second equipment and obstacle information between the first equipment and the second equipment; acquiring 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 reflection surface and a target precoding matrix of the first device according to the first channel state information, wherein the target reflection phase shift is used for determining a target parameter of the intelligent reflection surface; and sending the sending signal processed by the target precoding matrix to the second equipment through the intelligent reflecting surface adjusted to the target parameter.

The embodiment of the disclosure provides an information transmission method, which is executed by a second device. Wherein, the method comprises the following steps: sending metadata so that a first device receives the metadata sent by a second device from the second device and the metadata sent by the second device through an intelligent reflection surface, and performing channel estimation processing according to the metadata received from the second device and the metadata received from the intelligent reflection 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 reflection surface, and a third channel parameter between the intelligent reflection surface and the second device; and receiving a transmission signal which is transmitted by the first equipment and processed by a target precoding matrix through the intelligent reflecting surface adjusted to the target parameter. 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 reflective surface according to the second channel parameter, obtain third channel state information between the intelligent reflective surface and the second device according to the third channel parameter, and determine a target reflection phase shift and a target precoding matrix of the intelligent reflective 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 a target parameter of the intelligent reflective surface.

The embodiment of the disclosure provides an information transmission method, which is executed by a road side unit. Wherein, the method comprises the following steps: acquiring second equipment information of second equipment and obstacle information between the first equipment and the second equipment; and sending the second equipment information and the obstacle information to the first equipment. 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 reflective surface, and a third channel parameter between the intelligent reflective 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 reflective surface according to the second channel parameter, obtain third channel state information between the intelligent reflective surface and the second device according to the third channel parameter, determine a target reflection phase shift of the intelligent reflective 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 a target parameter of the intelligent reflective surface, and send a signal processed by the target precoding matrix to the intelligent reflective surface through the second device as the target reflection parameter.

The disclosed embodiments provide an information transmission method, which is performed by an intelligent reflective surface. Wherein, the method comprises the following steps: 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 reflective 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 reflective surface, and a third channel parameter between the intelligent reflective 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 reflective surface according to the third channel parameter, and determine a phase shift matrix of the first channel state information and the second channel state information between the intelligent reflective surface according to the second channel parameter, and determine a phase shift matrix of the target reflective surface; determining target parameters of the intelligent reflecting surface according to the target reflection phase shift; receiving a transmission signal which is sent by the first equipment and processed by the target precoding matrix; and processing the transmission signal processed by the target precoding matrix by using the target parameter of the intelligent reflection surface, and transmitting the transmission signal to the second equipment.

The disclosed embodiment provides a first device, which includes: an apparatus obstacle information acquiring unit configured to acquire first apparatus information of the first apparatus, second apparatus information of a second apparatus, and obstacle information between the first apparatus and the second apparatus; a channel parameter acquiring unit, configured to acquire a first channel parameter between the first device and the second device; a first channel state information determining 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 determining unit, configured to determine a target reflection phase shift of an intelligent reflection 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 a target parameter of the intelligent reflection surface; and the sending signal processing and transmitting unit is used for sending the sending signal processed by the target precoding matrix to the second equipment through the intelligent reflecting surface adjusted to the target parameter.

The embodiment of the present disclosure provides a second device, including: a metadata transmitting unit, configured to transmit metadata, so that a first device receives, from a second device, the metadata transmitted by the second device and the metadata transmitted by the second device through an intelligent reflective surface, and perform channel estimation processing according to the metadata received from the second device and the metadata received from the intelligent reflective 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 reflective surface, and a third channel parameter between the intelligent reflective surface and the second device; and the signal receiving unit is used for receiving the transmission signal which is sent by the first equipment and is processed by the target precoding matrix through the intelligent reflecting surface which is adjusted to be the target parameter. 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 reflective surface according to the second channel parameter, obtain third channel state information between the intelligent reflective surface and the second device according to the third channel parameter, and determine a target reflection phase shift of the intelligent reflective surface and the target precoding matrix 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 a target parameter of the intelligent reflective surface.

The disclosed embodiment provides a road side unit, and this road side unit includes: the equipment obstacle information acquisition unit is used for acquiring second equipment information of second equipment and obstacle information between the first equipment and the second equipment; and the equipment obstacle information sending unit is used for sending the second equipment information and the obstacle information to the first equipment. 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 reflective surface, and a third channel parameter between the intelligent reflective 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 reflective surface according to the second channel parameter, obtain third channel state information between the intelligent reflective surface and the second device according to the third channel parameter, determine a target reflection phase shift of the intelligent reflective 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 a target parameter of the intelligent reflective surface, and send a signal processed by the target precoding matrix to the intelligent reflective surface through the second device as the target reflection parameter.

The disclosed embodiment provides an intelligence reflecting surface, and this intelligence reflecting surface includes: a metadata receiving unit, configured to receive metadata sent by the second device; a metadata reflection unit, configured to send 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 reflection 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 reflection surface, and a third channel parameter between the intelligent reflection surface and the second device, where 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, determine second channel state information between the first device and the second device according to the first channel parameter, obtain second channel state information between the first device and the intelligent reflection surface according to the second channel parameter, obtain second channel state information between the intelligent reflection surface and the second channel state information according to the third channel parameter, and determine a phase shift matrix of the reflection surface according to the precoding channel state information, and the target channel state matrix of the reflection surface; the target parameter adjusting unit is used for determining target parameters of the intelligent reflecting surface according to the target reflection phase shift; a transmitting signal receiving unit, configured to receive a transmitting signal processed by the target precoding matrix and transmitted by the first device; and the sending signal reflecting unit is used for processing the sending signal processed by the target precoding matrix by using the target parameter of the intelligent reflecting surface and sending the signal to the second equipment.

The embodiments of the present disclosure provide a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the information transmission method as in the above embodiments.

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, which when executed by one or more processors, cause the one or more processors to implement the information transmission method as in the above embodiments.

Drawings

Fig. 1 schematically shows a flow chart of an information transmission method according to an embodiment of the present disclosure.

Fig. 2 schematically illustrates an application scenario diagram of an information transmission method according to an embodiment of the present disclosure.

Fig. 3 schematically shows an application scenario diagram of an information transmission method according to another embodiment of the present disclosure.

Fig. 4 schematically shows a flow chart of an information transmission method according to another embodiment of the present disclosure.

Fig. 5 schematically illustrates an application scenario diagram of an information transmission method according to still another embodiment of the present disclosure.

Fig. 6 schematically shows a flow chart of an information transmission method according to another embodiment of the present disclosure.

Fig. 7 schematically shows a flow chart of an information transmission method according to yet another embodiment of the present disclosure.

Fig. 8 schematically shows a flow chart of an information transmission method according to still another embodiment of the present disclosure.

Fig. 9 schematically shows a block diagram of a first device according to an embodiment of the present disclosure.

Fig. 10 schematically shows a block diagram of a second device according to an embodiment of the present disclosure.

Fig. 11 schematically illustrates a block diagram of a roadside unit according to an embodiment of the present disclosure.

FIG. 12 schematically illustrates a block diagram of an intelligent reflective surface, according to an embodiment of the present disclosure.

FIG. 13 shows a schematic structural diagram of an electronic device suitable for use in implementing embodiments of the present disclosure.

Detailed Description

First, some terms appearing in the embodiments of the present disclosure will be explained.

IRS: intelligent reflective Surface, 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 reflective elements on a plane, thereby significantly improving the performance of the wireless communication network and enabling sustainable capacity growth of future wireless networks with low cost, low complexity and low energy consumption.

LoS: line-of-Sight wireless transmission, is an abbreviation for Line-of-Sight.

NLoS: non Line-of-Sight wireless transmission, is an abbreviation of Non-Line-of-Sight. Propagation conditions of a wireless communication system can be divided into line-of-sight and non-line-of-sight environments. Under the condition of line-of-sight, the wireless signal propagates in a "straight line" between the transmitting end (e.g. the First device or the second device, hereinafter) and the receiving end (e.g. the second device or the First device) without obstruction, there is no object in the First Fresnel zone (First Fresnel zone) that can obstruct the radio wave, and if the condition is not satisfied, the signal strength will be significantly reduced. The size of the fresnel zone depends on the frequency of the radio waves and the distance between the transceivers.

And (3) the RSU: road Side Unit, an abbreviation for Road Side Unit. The device is installed On the roadside, and may communicate with an On Board Unit (OBU) installed in a vehicle by using, for example, DSRC (Dedicated Short Range Communication) technology, thereby realizing vehicle identification and the like.

UAV: drone, acronym for Unmanned Aerial Vehicle. The unmanned aerial vehicle does not need a pilot to drive in the cabin, and the whole flight process is automatically finished under the control of the electronic equipment.

MRT: maximum Ratio Transmission/Maximum Ratio Transmission is an abbreviation for Maximum Ratio Transmission.

4G: the fourth generation mobile communication technology is an abbreviation of the 4th generation mobile communication technology.

5G: the fifth generation mobile communication technology is an abbreviation of the 5th generation mobile communication technology.

Fig. 1 schematically shows a flow chart of an information transmission method according to an embodiment of the present disclosure. The embodiment of fig. 1 is illustrated with the first device performing the method, but the disclosure is not limited thereto.

The first device in the embodiments of the present disclosure may be any electronic device with communication and computing processing capabilities, such as various terminals, and/or servers, and/or communication devices, and so on.

The server in the embodiment of the present disclosure may be an independent physical server, may also be a server cluster or a distributed system formed by a plurality of physical servers, and may also be a cloud server providing a cloud computing service.

The terminal may be, but is not limited to, a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart watch, a vehicle-mounted terminal, a smart television, and the like. The terminal and the server may be directly or indirectly connected through wired or wireless communication, and the disclosure is not limited thereto.

In the following description, the first device is exemplified as a communication device.

The communication device in the embodiments of the present disclosure may be an active communication device capable of acting as a transmission source, and may include, for example, a 4G/5G base station, an RSU, wi-Fi, and the like.

As shown in fig. 1, a method provided by an embodiment of the present disclosure may include:

in S110, 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 are acquired.

In the embodiment of the present disclosure, the second device may be any electronic device with communication capability, such as various terminals, and/or servers, and/or communication devices.

In the following description, the second device is exemplified as a transportation device.

The transportation device of the disclosed embodiment can be any device with transportation function. If the transport equipment has autopilot capabilities, it may be referred to as an autopilot transport equipment.

The automatic driving transportation equipment is transportation equipment which can be automatically and safely operated under the condition of no human active operation or less human auxiliary operation by means of the cooperative cooperation of artificial intelligence, visual calculation, radar, a monitoring device, a positioning system and the like. The automatic driving technology is applied to transportation equipment, so that a large amount of manpower resources can be saved, and the road traffic safety is improved.

In the following description, a transportation device is exemplified as a vehicle.

Vehicles in embodiments of the present disclosure may include any one or more of manned vehicles, intelligent networked vehicles, unmanned vehicles (otherwise known as autonomous vehicles), and the like.

The vehicle in the embodiment of the present disclosure may have an onboard unit mounted thereon, and the vehicle may establish communication with a first device, such as the above-described communication device, through a radio communication subsystem built in the onboard unit thereof.

In the following description, a container truck (hereinafter, simply referred to as a truck) in a vehicle is further described as an example, but the present disclosure is not limited thereto.

An obstacle in an embodiment of the present disclosure may refer to any object that prevents communication between a first device and a second device. In the following description, the container accumulated in the port is assumed as an obstacle when the vehicle is used as the container truck, but the present disclosure is not limited thereto.

In the disclosed embodiments, the obstacle information between the first device and the second device may change as the second device moves, and/or as the obstacle itself changes (e.g., changes in height, width, volume, etc.).

In an exemplary embodiment, the obtaining of 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.

The road side unit RSU in the embodiments of the present disclosure may also be referred to as a road side sensing device, which may include one or more of a camera, a laser radar, a millimeter wave radar, various sensors, and the like. The roadside sensing device can be installed at the roadside, can provide environmental data around the roadside in real time, and then sends the collected data to a background, such as the first device, through an optical fiber and/or a 4G/5G base station, and the like, so as to manage road conditions in real time.

In the embodiment of the disclosure, the roadside sensing device may acquire the second device information and/or the obstacle information, and send the acquired second device information and/or the obstacle information to the first device.

It is to 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, and the first device information may be stored locally on the first device itself or remotely on another server, from which the first device reads the first device information when needed.

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

For example, if the second device is a hub card with autopilot capabilities, the hub card may have a sensing device, for example, the sensing device may include a Positioning device, which may be used to capture real-time location information (hereinafter referred to as a second location) of the hub card, and the Positioning device may be, for example, a GPS (Global Positioning System) module. The second device may report the second location to the first device via the on-board unit.

As another example, the second device may also be capable of communicating withHeight information of the second device (hereinafter referred to as third height h) ₁ ) And reporting to the first equipment.

In some embodiments, the sensing device may further include an image capturing device (e.g., a camera), and the image capturing device may be configured to capture obstacle information and report the captured obstacle information to the first device, for example, the camera on the truck may capture an image of the container, and perform image processing on the image of the container, so as to identify the height of the container (hereinafter, referred to as the first height h) ₂ )。

It should be noted that, in this embodiment, the second device reports the second device information and/or the obstacle information to the first device, where the second device information and/or the obstacle information may be sent to the first device through a vehicle-mounted terminal installed on the second device, or any module with a wireless communication function installed on the second device sends the second device information and/or the obstacle information to the first device, and this is not limited in this disclosure.

In the embodiment of the present disclosure, the second device may report the second device information and/or the obstacle information to the first device at regular time according to a set specific frequency, where the specific frequency may be set according to an actual requirement, for example, reporting once in 1s, or may set different reporting frequencies for different pieces of second device information and/or obstacle information, and the like; the second device information and/or the obstacle information may be reported to the first device by using an event triggering method, when a preset triggering event occurs, the second device information and/or the obstacle information may be reported to the first device, and the triggering event may be set according to an actual situation, which is not limited by the present disclosure.

In this embodiment of the present disclosure, the second device information and/or the obstacle information may be transmitted to the first device through a wireless air interface.

In S120, a first channel parameter between the first device and the second device is obtained.

In the embodiment of the present disclosure, the first device may obtain, in addition to the first channel parameter between the first device and the second device, a second channel parameter between the first device and the IRS, and a third channel parameter between the IRS and the second device.

In an exemplary embodiment, obtaining a first channel parameter between the first device and the second device, a second channel parameter between the first device and the intelligent reflective surface, and a third channel parameter between the intelligent reflective surface and the second device may include: receiving metadata transmitted by the second device from the second device; receiving, by the smart reflective surface, metadata transmitted by the second device; and performing channel estimation processing according to 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.

The IRS in the embodiment of the present disclosure may be installed on a wall at a high position of a building (although the installation position and the installation manner of the IRS are not limited in the present disclosure, and may be specifically set according to actual needs), the line-of-sight communication may be established between the communication device and the vehicle in a case where a line-of-sight link between the first device (for example, the communication device) and the second device (for example, the vehicle) is occluded (including partial occlusion and full occlusion), and the IRS may also be used to assist the communication between the communication device and the vehicle in a case where the line-of-sight link between the communication device and the vehicle is not occluded at all, that is, it is assumed here that the line-of-sight link exists between the IRS and the vehicle, and between the IRS and the communication device.

In the embodiment of the present disclosure, a link in which the second device sends data to the first device is referred to as an uplink, and a link in which the first device sends data to the second device is referred to as a downlink. For the uplink, the second device may transmit metadata information to the first device, a part of the metadata information may be directly received by the first device, for example, the communication device, another part of the metadata information may be reflected to the communication device through the IRS, and the communication device obtains a first channel parameter between the first device (e.g., the base station) and the second device, a second channel parameter between the base station and the IRS, and a third channel parameter between the IRS and the second device by receiving the metadata information directly transmitted by the second device and the metadata information reflected through the IRS for channel estimation, so as to be used for subsequent joint estimation of 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.

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

In an example embodiment, the second channel parameters may include a second line-of-sight component between the first device and the IRS, which may be represented, for example, as a LoS channel matrix between the first device and the IRS, and a second non-line-of-sight component, which may be represented, for example, as an NLoS channel covariance matrix between the first device and the IRS.

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

In S130, first channel state information between the first device and the second device is determined according to the first device information, the second device information, the obstacle information, and the first channel parameter.

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

In the embodiment of the present disclosure, the visible area of the first device refers to a range that can be covered by the electromagnetic wave radiated outward by the communication device, regardless of reflection, with the geographical location (referred to as a first location) where the first device, for example, the communication device, is located as a center.

The ground position visible area of the first device refers to an area where electromagnetic waves radiated outward by the first device, such as a communication device, can cover the ground without considering reflection.

In an example embodiment, 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 may include: determining a first distance between the first device and the second device from the first location and the second location; and if the second equipment is determined to be located outside the visible area of the ground position according to the second position, the first height is larger than a first threshold value, and the first distance is larger than a second threshold value, obtaining first channel state information between the first equipment and the second equipment according to the first non-line-of-sight component.

In the above embodiment, the first device calculates the first distance d between the first device and the second device according to the acquired first position and the acquired second position, which is used for illustration, but the disclosure is not limited thereto. In other embodiments, for example, a sensing device such as a laser radar may be further installed on the second device, and the first distance d between the first device and the second device may be directly measured by the sensing device, and then the measured first distance d is reported to the first device.

In the disclosed embodiment, when the first device determines that the second device is located outside the visible area of the ground position of the first device according to the second position of the second device obtained from the road side unit, 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 may be determined that the line-of-sight link between the first device and the second device is completely blocked.

The envelope of the stationary narrow-band gaussian random process follows a rayleigh distribution. In an actual scene, a scene rich in scattering sources can be modeled into rayleigh distribution, that is, signals are reflected, superposed and converged from multiple paths of signals. Since the LoS link between a first device, e.g., a communication device, and a second device, e.g., a vehicle, may be affected by dynamic changes in obstacles, the channel fading between the communication device and the vehicle may be modeled as rayleigh fading, i.e., the channel between the communication device and the vehicle is considered to be rayleigh (gaussian) distributed, i.e., determined to be a rayleigh channel, when the line-of-sight link between the communication device and the vehicle is completely blocked/occluded.

In the embodiments of the present disclosure, it is assumed that first channel state information between a first device and a second device is represented as h _su When the channel between the first device and the second device obeys rayleigh distribution, h _su Can be expressed as:

in the above formula, α _su Representing a path loss coefficient between the first device and the second device; g is a radical of formula _su,NLoS Representing a first non-line-of-sight component between the first device and the second device, subject to a zero-mean gaussian distribution.

Wherein a path loss coefficient between the first device and the second device may be according to a free space path loss function

d is the first distance (in meters) between the first device and the second device,

is the path loss exponent between the first device and the second device, which is typically greater than 2.

In an exemplary embodiment, the first device information may further include a second highest of the first deviceDegree h ₃ (ii) a The second device information may further include a third height h of the second device ₁ (ii) a The obstacle information may also include a third location of the obstacle.

In an exemplary embodiment, the method may further include: obtaining a second distance d between the second device and the obstacle according to the second position and the third position ₁ (ii) a Determining the first threshold based on the second distance, the second height, the third height, and the first distance.

In the above embodiment, the first device calculates and obtains the second distance d between the second device and the obstacle according to the obtained second position and the third position ₁ The present disclosure is not limited thereto. In other embodiments, the second device may further include a sensing device, such as a laser radar, for example, mounted thereon, and the second distance d between the second device and the obstacle may be directly measured by the sensing device ₁ Then measuring the obtained second distance d ₁ Reporting to the first device, where the method for the first device to obtain the second distance is not limited in the present disclosure.

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

In an exemplary embodiment, the method may further include: acquiring a first distance factor and a meteorological factor; determining the second threshold from the first distance factor, the weather factor, the third altitude, and the second altitude.

In the embodiment of the present disclosure, the first threshold and the second threshold may be set according to actual situations. In the following description, it is assumed that a linear distance between the first device and the second device is a first distance d, a linear distance between the second device and the obstacle is a second distance d1, a linear distance between the obstacle and the first device is d2, a third height of the second device is h1, a first height of the obstacle is h2, and a second height of the first device is h3.

For example, the first threshold may be expressed as:

for example, the second threshold may be expressed as:

threshold value of 2=1.7d ₀ (3)

In the above formula, 1.7 is the first distance factor, but this is only by way of example and not limited thereto; d is a radical of ₀ The apparent distance of the first device can be expressed by the following formula:

in the above formula, k is a meteorological factor. The meteorological factors can be obtained through conventional data of national surface meteorological stations.

That is, in the embodiment of the present disclosure, if the second device is located outside the visible region of the ground position of the first device, the requirement is satisfied at the same time

And d>1.7d ₀ Then it may be determined that the line-of-sight link between the second device and the first device is completely occluded.

In an exemplary embodiment, the first device information may include a ground location visible area of the first device, and a first location; the second device information may include a second location of the second device; the obstacle information includes 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.

In an exemplary embodiment, 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 may include: determining a first distance between the first device and the second device from the first location and the second location; and if the second equipment is positioned in the ground position visible area according to the second position, the first height is smaller than a third threshold value, and the first distance is smaller than a fourth threshold value, acquiring first channel state information between the first equipment and the second equipment according to the first line-of-sight component.

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

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

In the embodiment of the present disclosure, it is assumed that first channel state information between a first device and a 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:

in the above formula, g _su,LoS Representing a first line-of-sight component between the first device and the second device.

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.

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 value according to the second distance, the second height, and the first distance.

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.

In an exemplary embodiment, the method may further include: acquiring a second distance factor and a meteorological factor; determining the fourth threshold based on the second distance factor, the weather factor, the third altitude, and the second altitude.

In the embodiment of the present disclosure, the third threshold and the fourth threshold may be set according to actual needs.

For example, the third threshold may be expressed as:

for example, the fourth threshold may be expressed as:

threshold value 4=0.7d ₀ (7)

In the above formula, 0.7 is the second distance factor, but this is merely an example and is not limited thereto.

That is, in the embodiment of the present disclosure, if the second device is located within the ground position visible area of the first device, and simultaneously satisfies

And d<0.7d ₀ Then it may be determined that the line-of-sight link between the second device and the first device is completely unobstructed.

In an exemplary embodiment, the first device information may include a ground location viewable area of the first device, and a first location; the second device information may include a second location of the second device; the obstacle information may include a first height of the obstacle; the first channel parameters may include a first line-of-sight component and a first non-line-of-sight component between the first device and the second device.

In an exemplary embodiment, 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 may include: determining a first distance between the first device and the second device from the first location and the second location; if the second equipment is determined to be positioned outside the ground position visible area according to the second position, and the first height is smaller than or equal to a first threshold value, or the first distance is smaller than or equal to a second threshold value; or determining that the second device is located within the ground position visible area according to the second 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 obtaining 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.

For example, if the second device is outside the ground location visibility region of the first device and is satisfied at the same time

Or if the second equipment is positioned outside the visible area of the ground position of the first equipment and d is less than or equal to 1.7d ₀ (ii) a Alternatively, if the second device is located within the ground position field of view of the first device and satisfies +>

Or if the second equipment is positioned in the ground position visible area of the first equipment and simultaneously satisfies that d is more than or equal to 0.7d ₀ Then it may be determined that the second device, e.g., the vehicle, is partially within the line of sight of the first device, e.g., the communication device, and the channel between the communication device and the vehicleThe rice channel is modeled, i.e. it is assumed that the channel between the communication device and the vehicle follows a rice distribution.

In the embodiments of the present disclosure, it is assumed that first channel state information between a first device and a second device is represented as h _su Then h when the channel between the first device and the second device is modeled as a rice channel _su Can be expressed as:

in the above formula, k _su Representing the rice factor between the first device and the second device. The rice factor between the first device and the second device represents the proportional relationship between the direct component power and the non-direct (diffuse) component power in the rice channel between the first device and the second device. A rice factor of a rice channel between a first device and a second device may be extracted based on a moment estimation method of a signal envelope. The value range of the rice factor between the first device and the second device is influenced by the signal power of the line-of-sight link, and is generally between-10 and 10 dB.

In S140, a target reflection phase shift of the intelligent reflective surface and a target precoding matrix of the first device are determined according to the first channel state information, where the target reflection phase shift is used to determine a target parameter of the intelligent reflective surface.

In an exemplary embodiment, determining the target reflection phase shift of the intelligent reflective 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: acquiring a second channel parameter between the first device and the intelligent reflective surface and a third channel parameter between the intelligent reflective surface and the second device; obtaining second channel state information between the first device and the intelligent reflecting surface according to the second channel parameters; obtaining third channel state information between the intelligent reflecting surface and the second equipment according to the third channel parameters; acquiring downlink traversal 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 traversal 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.

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 smart reflective surface; the third channel parameters may include a third line-of-sight component and a third non-line-of-sight component between the intelligent reflective surface and the second device.

In the embodiment 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 Representing third channel state information between the IRS and the second device as h _ru 。

The distribution of the rice channel is the distribution of an envelope of a sine wave plus narrow-band Gaussian random process, and comprises an apparent distance component and a non-apparent distance component, wherein the non-apparent distance component obeys Rayleigh distribution, and the apparent distance component is a deterministic constant. Since the IRS may provide an additional line-of-sight link for the first device, e.g. the communication device, and the second device, e.g. the vehicle, the link through the IRS, i.e. the channel between the IRS and the vehicle, and the communication device and the IRS, is modeled as a leis distribution.

In the embodiment 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:

in the above formula, k _sr Representing a rice factor between the IRS and the first device; alpha (alpha) ("alpha") _sr Representing a path loss coefficient between the IRS and the first device; g _sr,LoS Representing the IRS and the first deviceA second line-of-sight component therebetween; g _sr,NLoS Representing a second non-line-of-sight component between the IRS and the first device.

In the embodiment 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 When the channel between the IRS and the second device is modeled as a Rice channel, h _ru Can be expressed as:

in the above formula, k _ru Representing a rice factor between the IRS and the second device; alpha is alpha _ru Representing a path loss coefficient between the IRS and the second device; g _ru,LoS Representing a third line-of-sight component between the IRS and the second device; g _ru,NLoS Representing a third non-line-of-sight component between the IRS and the second device.

In the disclosed embodiment, the initial reflection phase shift of IRS is assumed to be

θ _i ∈(0,2π]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 reflective phase shifting elements of the IRS, diag () represents a diagonal matrix; the power of a first device, for example, a communication device, is P, and an initial precoding matrix (also referred to as a beamforming vector) of the first device is ω; if the first device sends a signal x to the second device, the expression for the initial received signal Y received by the second device, e.g. a vehicle, may be:

according to shannon's theorem, the downlink traversal capacity (also called downlink traversal rate) between the first device and the second device can be obtained as follows:

E{log(1+P||(h _su +h _ru Φh _sr )ω||)} (12)

in the above formula, E { } E represents expectation; | | | represents a two-norm.

The objective of the algorithmic solution is to optimize the initial reflection phase shift of the IRS

Maximizing the downlink traversal capacity of the system:

by using coordinate gradient descent algorithm, the optimal solution of IRS reflection phase shift can be obtained by solving the formula (13) as the target reflection phase shift phi ^* Then, a target precoding matrix omega is obtained according to the MRT criterion ^* ，ω ^* Can be expressed as:

h in the above formula represents the transposed conjugate of the matrix.

In S150, the transmission signal processed by the target precoding matrix is transmitted to the second device through the intelligent reflective surface adjusted to the target parameter.

The received signal received by the second device, for example, a vehicle, mainly includes two paths, one of which is directly transmitted from the first device, for example, a communication device, and the other is reflected by the IRS, that is, after the first device generates the transmission signal, the transmission signal is processed by the target precoding matrix and then transmitted, a part of the transmission signal is directly transmitted to the second device, and the other part of the transmission signal is reflected to the second device by the IRS, that is, an expression of a target received signal Y received by the second device may be:

thus, by changing the target parameters of the IRS, such as the reflection coefficient, the amplitude phases of the transmission signals x sent by the first device, such as the base station, can be superposed in the same direction at the receiving end, i.e., the second device, so that the signal power is enhanced and the communication quality is better.

On one hand, by acquiring first device information of a first device, second device information of a second device, and obstacle information between the first device and the second device, and acquiring a first channel parameter between the first device and the second device, and further 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, the first channel state information between the first device and the second device can be automatically adjusted through detecting the obstacle information between the first device and the second device which are in communication with each other in real time, so that a changeable communication environment between the first device and the second device can be self-adapted; on the other hand, the target reflection phase shift of the intelligent reflection surface and the target precoding matrix of the first device may also be determined according to the determined first channel state information between the first device and the second device, so that the target parameter of the intelligent reflection surface may be adjusted by using the configured target reflection phase shift, so that when the first device is ready to send a signal to the second device, the target precoding matrix may be used to process the send signal ready to be sent to the second device, and then the send signal processed by the target precoding matrix may be sent to the second device through the intelligent reflection surface adjusted to the target parameter, thereby enhancing the reflection of the send signal by using the intelligent reflection 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.

An Intelligent Transportation System (ITS), also called Intelligent Transportation System (Intelligent Transportation System), is a comprehensive Transportation System which effectively and comprehensively applies advanced scientific technologies (information technology, computer technology, data communication technology, sensor technology, electronic control technology, automatic control theory, operational research, artificial intelligence and the like) to Transportation, service control and vehicle manufacturing, strengthens the relation among vehicles, roads and users, and thus forms a safety-guaranteeing, efficiency-improving, environment-improving and energy-saving comprehensive Transportation System.

An Intelligent Vehicle Infrastructure Cooperative System (IVICS), referred to as a Vehicle Infrastructure Cooperative system for short, is a development direction of an Intelligent Transportation System (ITS). The vehicle-road cooperative system adopts advanced wireless communication, new generation internet and other technologies, implements vehicle-vehicle and vehicle-road dynamic real-time information interaction in all directions, develops vehicle active safety control and road cooperative management on the basis of full-time-space dynamic traffic information acquisition and fusion, fully realizes effective cooperation of human and vehicle roads, ensures traffic safety, improves traffic efficiency, and thus forms a safe, efficient and environment-friendly road traffic system.

The intelligent traffic remote control vehicle operation process in the related technology comprises the steps of firstly collecting the position and video information of a vehicle in real time through a camera or a laser radar installed on the road side, and then uploading the position and video information to a background to be managed and controlled by related technical personnel. The background transmits a V2X (vehicle to outside information exchange) message to a radio frequency terminal of the vehicle through the communication equipment, and then the vehicle completes corresponding technical actions.

However, the above related art has at least the following problems:

first, under wisdom traffic vehicle and road cooperation scene, the communication link between vehicle and the communications facilities receives the blockking of barrier easily, and transmission rate reduces, and communication quality descends, is unfavorable for wisdom traffic's remote control.

Secondly, in the intelligent transportation vehicle-road coordination scene, as storage yard obstacles such as containers need to be unloaded and shipped periodically, the height of the obstacles is not fixed, the communication environment between the vehicle and the communication equipment is changed frequently, the configuration of the IRS reflection phase is not facilitated, and the transmission rate is easily reduced by the IRS assistance.

The method provided by the embodiment of the disclosure can be applied to an intelligent vehicle-road coordination system in an intelligent traffic system. The information transmission method provided by the embodiment of the present disclosure is described below with reference to fig. 2 to 5, but is not limited thereto.

As shown in fig. 2, it is assumed that the second device is a vehicle 201 and the first device is a communication device 204. The intelligent reflective surface IRS 202 may include an IRS controller 203.

In the embodiment of fig. 2, the vehicle 201 is taken as an example of a hub with an automatic driving function, and may have the following functions:

the system is provided with in-vehicle sensing equipment which can monitor the position information, speed, acceleration, in-vehicle temperature, in-vehicle humidity, equipment entertainment facility state and the like of the vehicle 201;

the communication interaction module is provided for realizing information interaction with the communication equipment 204;

the communication interaction module is connected to the in-vehicle bus, and converts instruction information (the transmission signal may include the instruction information) sent by the communication device 204 into an interaction instruction of a specific in-vehicle module, for example, according to the in-vehicle temperature and the in-vehicle humidity (set by the remote server 310 according to the target trip request) sent by the communication device 204, adjusts a temperature controller and a humidity controller in the vehicle; planning a path according to the target departure place and the target destination sent by the communication equipment 204, and driving a vehicle driving related module to enter a vehicle driving state;

the automatic driving device has automatic driving capability and meets various performances required by automatic driving.

The communication device 204 may have the following functions:

the intelligent reflection surface IRS is provided with a communication module for realizing information interaction with the vehicle 201, the intelligent reflection surface IRS 202 and the IRS controller 203;

the system has decision and scheduling functions, and can make correct decisions and scheduling according to the transport equipment state information of each vehicle 201.

The intelligent reflective surface IRS 202 can receive the configured target reflection phase shift from the communication device 204 by the IRS controller 203 sending and receiving data to the communication device 204, for example, sending metadata received from the vehicle 201 to the communication device 204.

The embodiment of fig. 3 is illustrated as an application scenario of the smart port.

The port is used as a transportation hub and plays a very important role in promoting international trade and regional development. Promote the intelligent upgrading at harbour, not only can improve the work efficiency at harbour itself, reduce the operation cost, will also play important pulling effect to the economy in peripheral area. The intelligent port automatically controls the container truck with automatic driving capability (also called unmanned container truck) through the background to perform automatic operation, and a series of remote control operations such as field bridge transition, container grabbing, releasing, loading and unloading are completed. The intelligent port can also adopt an unmanned aerial vehicle to return a real-time video when the unmanned aerial vehicle patrols and examines at a wharf, and a driver can analyze and process the returned real-time video through an AI (Artificial Intelligence) technology at the background instead of the intelligent card collection so as to perform real-time early warning analysis and the like on the behavior of the unmanned card collection.

Referring to fig. 3, a system model diagram for assisting communication capacity improvement by means of IRS in a smart transportation vehicle-road cooperation scenario is provided, where the system model diagram includes a vehicle, an obstacle, an IRS, a communication device, and a roadside sensing device.

Since the number of obstacles such as containers 302 in the yard is constantly changing, the direct link between a vehicle such as a truck 301 and a communication device 303 is blocked during travel, severely affecting the communication between the communication device 303 and the truck 301. In the embodiment of fig. 3, by installing IRS 306 on building wall 307, line-of-sight communication can be provided for communication device 303 and card 301, which assists in increasing communication capacity.

In the embodiment of fig. 3, the transmitting end, i.e. the communication device 303, receives the metadata sent by the hub card 301 (including direct reception from the hub card 301 and reflection reception through the IRS 306) to perform adaptive channel estimation, and obtains the first channel parameter, the second channel parameter and the third channel parameter. It is assumed here that the truck 301 travels in the direction of the arrow of the broken line, and that the communication between the second position of the truck 301 and the communication device 303 is completely blocked by the container 302 at the first time t1, and the communication between the second position of the truck 301 and the communication device 303 is not completely blocked by the obstacle 302 at the second time t 2.

In the embodiment of fig. 3, it is assumed that the roadside unit 305 is mounted on the light pole 304, the roadside unit 305 may be configured to collect information such as the second position of the hub card 301, the azimuth angle of the hub card 301 relative to the container 302, and the first height of the container 302, and then transmit the information to the communication device 303, and the communication device 303 may determine, according to the information received from the roadside unit 305, whether a line-of-sight link between the hub card 301 and the communication device 303 is completely blocked, partially blocked, or completely unblocked, so as to model a corresponding channel, for example, one of a leis channel, and a rayleigh channel, and according to the modeled corresponding channel, design a corresponding optimization algorithm to jointly optimize an initial precoding matrix of the communication device to obtain a target precoding matrix and a target reflection phase of the IRS, enhance reflection of a transmission signal transmitted to the hub card 301 by the communication device 303, and improve communication quality between the communication device 303 and the hub card 301.

As shown in fig. 4, a schematic flow chart of a method for assisting communication capacity improvement by means of IRS in an intelligent transportation vehicle-road coordination scenario is provided, where the method provided in the embodiment of the present disclosure may include:

in S001, position information (second position) of the vehicle and height information (first height) of the obstacle are collected with the roadside sensing device.

In S001, a roadside sensing device may be used to collect a shadow area of the obstacle projected on the ground, that is, a shadow area of the obstacle on the ground, so as to solve the shadow area to obtain height and width information of the obstacle projected on the ground, for example, by using an image recognition processing technique. Or the roadside sensing equipment can be used for directly collecting the height and width information of the obstacle projection 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 first height of the obstacle may also be obtained by directly measuring with a roadside sensing device, which is not limited by the present disclosure.

In S001, azimuth information of the vehicle relative to the obstacle may be collected by using the roadside sensing device.

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

The estimation task in the embodiments of the present disclosure may include: the communication equipment judges whether a direct link between the vehicle and the communication equipment is completely blocked or not according to information such as the first height of the obstacle, the second position of the vehicle (optionally, the azimuth angle of the vehicle can also be included) and the like; after the communication equipment judges whether a direct link between the vehicle and the communication equipment is completely shielded, partially shielded or not according to the information collected by the roadside sensing equipment, a corresponding channel is modeled, and the first channel state information, the second channel state information and the third channel state information are estimated to design a corresponding optimization algorithm.

In S101-S102, the communication device performs channel-related parameter estimation (including the first channel parameter, the second channel parameter, and the third channel parameter) by using an adaptive channel estimation algorithm.

In S101, the vehicle transmits metadata, one portion is directly received by the communication device, and the other portion is reflected to the communication device via the IRS.

In S102, the communication device estimates the relevant channel parameters by an estimation algorithm.

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

In the embodiment of the present disclosure, the metadata transmitted by the vehicle may be understood as pilot information or a reference signal transmitted by the vehicle side, and the communication device, for example, a base station, may estimate parameters of a model and estimate related channel parameters by using a related channel estimation algorithm according to the received pilot information and assuming a certain channel model.

S201-S203 judge whether the vehicle is in the sight distance range of the communication device at the current moment according to the fact that whether the first Fresnel zone of the communication device is shielded by the terrain and the ground object and the information collected by the roadside sensing device, including the second position of the vehicle and the first height and width information of the obstacle, and the distance information between the transmitting and receiving places (the first distance between the communication device and the vehicle).

In S201, if the second position of the vehicle is located outside the visible area of the ground position of the communication device, the first height of the obstacle is greater than the threshold 1, and the first distance between the vehicle and the communication device is greater than the 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 sequentially executed.

For example, in a smart port scenario, assume that the linear distance between the hub and the communication device is d =20 meters, where the linear distance between the hub and the container is d ₁ =10 m, the straight-line distance between the container and the communication device is d ₂ =10 meters; the height of the container truck is 2.5 meters, and the height of the container is h ₂ Meter, height of the communication device (assumed RSU) is 5.5 meters, meteorological factor k =0.25. The meteorological factors are influenced by climate and environment, including air temperature, air flow, air humidity, air pressure and the like. Thus, if the concentrator card is located outside the field of view of the ground location of the communication device, h is determined according to equation (2) above ₂ >(10 + 5.5+2.5 (20-2.5))/20 =11.5 m, and d is determined according to the above formula (3)>1.7d ₀ At this point 301 is executed.

In S301, an optimization algorithm 1 is designed.

S301 first establishes a channel model. 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 rayleigh distribution; the channels between the communication device and the IRS, the IRS and the vehicle follow a rice distribution. Secondly, according to the Shannon theorem, an expression of the downlink traversal capacity is solved, then an optimization algorithm 1 is designed to calculate the optimal target reflection phase shift and the optimal target precoding matrix of the IRS so as to achieve maximization of the downlink traversal capacity, then the communication equipment processes the transmitted signals by using the target precoding matrix, and then the signals are reflected by the IRS which is adjusted according to the target reflection phase shift, and the vehicle is responsible for receiving the signals.

For example, the above formula (1)

Substituting the formula (9) and the formula (10) into the formula (13) to be used as an optimization algorithm 1, and solving to obtain the target reflection phase shift phi ^* 。

In S302, the IRS reflection phase shift is configured.

The communication device will shift the target reflection phase phi designed according to S301 ^* Sending to the IRS controller, the IRS controller receiving the target reflection phase shift phi ^* And adjusting related parameters of a passive component built in the IRS to obtain target parameters so as to control the amplitude and phase independent reflected signals of the IRS.

In S303, the target reflection phase shift Φ designed according to MRT and S301 ^* Generating a target precoding matrix omega ^* 。

The equivalent downlink channel between the first device and the second device, which is the sum 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, can be obtained according to the target reflected phase shift of the IRS designed by the optimization algorithm 1. So the equivalent channel is related to the target reflection phase shift of the IRS). At the moment, the sending signals are pre-coded according to the target pre-coding matrix, and the signals are transmitted according to an MRT mechanism. The design of the target precoding matrix of the transmission signal can be designed by a matched filtering method.

In S304, a signal is transmitted.

In S304, the communication device generates a transmission signal x, which is transmitted after being processed by the target precoding matrix obtained in S303, and is reflected to the vehicle by the IRS, and the vehicle receives the target reception signal.

In S202, if the vehicle is located within the visible range of the ground position of the communication device, the first height of the obstacle is smaller than the threshold 3, and the first distance between the vehicle and the communication device is smaller than the threshold 4, it is determined that the vehicle is completely within the visible range of the communication device, and S501 is subsequently performed.

For example, in a smart port scenario, if the hub is outside the field of view of the ground location of the communication device, and h is determined according to equation (6) above ₂ <10 × 5.5/20=2.75 m, and d is determined according to the above formula (7)<0.7d ₀ At this time, S501 is executed.

In S501, an optimization algorithm 3 is designed.

A channel model is first established. Since the vehicle is completely within line-of-sight range of the communication device, the LoS link between the communication device and the vehicle dominates, the channel between the communication device and the vehicle is modeled as a direct channel; the channels between the communication device and the IRS, the IRS and the vehicle follow a rice distribution. Secondly, according to the Shannon theorem, an expression of the downlink traversal capacity is solved, and the optimized IRS target reflection phase shift is calculated by the design optimization algorithm 3 so as to realize the maximization of the downlink traversal capacity.

For example, the above formula (5)

Substituting the formula (9) and the formula (10) into the formula (13) to be used as an optimization algorithm 3, and solving to obtain a target reflection phase shift phi ^* 。

In S502, the IRS reflection phase shift is configured.

S502, according to the target reflection phase shift of the IRS designed in S501, relevant parameters of a passive component arranged in the IRS are adjusted, and the reflection signal with independent amplitude and phase is controlled.

In S503, a target precoding matrix is designed according to the MRT.

S503, generating a target precoding matrix according to the MRT and the target reflection phase shift of the IRS designed in S501.

In S504, a signal is transmitted.

S504 processes the transmission signal according to the target precoding matrix obtained in S503, and then transmits the signal.

In S203, except for the cases described in S201 and S202, it may be determined that there is an obstacle that can partially affect the signal propagation between the vehicle and the communication device, for example, signal reduction due to blockage by tall trees, and then S401 is executed.

In S401, optimization algorithm 2 is designed.

A channel model is first established. Modeling a channel between the communication device and the vehicle as a rice channel due to the vehicle portion being within a line of sight range with the communication device; the channels between the communication device and the IRS, the IRS and the vehicle follow a rice distribution. Secondly, according to the Shannon theorem, an expression of the downlink traversal capacity is solved, the optimized target reflection phase shift of the IRS is calculated by the design optimization algorithm 2, so that the maximization of the downlink traversal capacity is realized, the maximization is used for processing the transmitted signals, and the vehicle is responsible for receiving the signals.

For example, the above equations (8), (9) and (10) are substituted into equation (13) to obtain the optimization algorithm 2, and the target reflection phase shift Φ is obtained by solving ^* 。

In S402, IRS reflection phase shift is configured.

S402, adjusting relevant parameters of a passive component arranged in the IRS according to the target reflection phase shift of the IRS designed in the S401, and controlling the reflection signal with independent amplitude and phase.

In S403, a target precoding matrix is designed according to the MRT.

S403, generating a target precoding matrix according to the MRT criterion and the target reflection phase shift of the IRS designed in S401.

In S404, a signal is transmitted.

S404 processes the transmission signal according to the target precoding matrix obtained in S403, and then transmits the signal.

In S601, according to S304, S404, and S504, the transmission signal reaches the vehicle (receiving end) through the direct path and the reflection path via the IRS, and the vehicle receives the signal through the built-in receiver, thereby completing the entire communication process.

In the disclosed embodiment, the channel profile between the communication device and the vehicle is changed by a change in the third position and the first height of the obstacle. The downlink traversal capacity refers to the average of multiple instantaneous capacities, so that the channel distribution between the communication device and the vehicle affects the form of the expression of the downlink traversal capacity, and further affects the optimization of the target reflection phase shift and the design of the target precoding matrix of the subsequent IRS.

The method provided by the embodiment of the disclosure can be applied to an intelligent traffic vehicle-road cooperation scene, the communication capacity is improved by the aid of the intelligent reflection surface, the information such as the position of a vehicle and the height of an obstacle is acquired by the aid of the roadside sensing equipment, and the acquired information is transmitted to the communication equipment by the roadside sensing equipment through a 5G/optical fiber link and the like; one part of metadata sent by the vehicle is directly received by the communication equipment, the other part of the metadata is reflected to the communication equipment through the IRS, the communication equipment estimates related channel parameters through a self-adaptive channel estimation algorithm, and judges whether a direct link between the vehicle and the communication equipment is completely shielded or not through information such as the height of an obstacle, the position of the vehicle, the azimuth angle of the vehicle and the like, so that a corresponding optimization algorithm can be designed, the target reflection phase shift of the IRS is configured, a target precoding matrix is designed according to MRT, signals sent by the communication equipment are received by the vehicle, and the whole communication process is completed.

According to the method provided by the embodiment of the disclosure, the IRS is deployed and configured on the surface of a fixed building such as a road junction and the like, the data collected by road-side sensing equipment such as a camera, a laser radar and a millimeter wave radar are combined to assist communication between communication equipment and a vehicle, dynamic change of an obstacle is sensed in real time by the road-side sensing equipment, whether the vehicle is occluded by the obstacle is judged, and different channels are selected and modeled according to different occlusion conditions, for example, when the height of the obstacle is detected to change, corresponding channels modeled can be adjusted in real time, so that second channel state information between the communication equipment and the IRS, third channel state information between the IRS and the vehicle and first channel state information between the communication equipment and the vehicle are estimated in a self-adaptive manner, a corresponding optimization algorithm can be designed, target reflection phase shift of the IRS is adjusted in real time, reflection of signals is enhanced, communication quality between the vehicle and the communication equipment is improved, and meanwhile, the requirement of high automation of intelligent traffic unmanned vehicles such as unmanned vehicle collection cards is met.

Fig. 5 schematically shows an application scenario diagram of an information transmission method according to still another embodiment of the present disclosure. The difference between the embodiment of fig. 5 and the embodiment of fig. 3 is that a channel model between the communication device 303 and the vehicle 301 is established by using the IRS 306 carried by the UAV501 over the road, and a corresponding optimization algorithm is designed to configure the target reflection phase shift of the IRS, so as to improve the downlink traversal capacity of the system.

The UAV relay communication system takes the UAV as a communication system of a mobile relay, has the advantages of long transmission distance, convenient deployment, flexibility, wide coverage range, quick system architecture, high economic benefit and the like by virtue of high mobility, can be used for realizing high-speed wireless communication, and plays an important role in a future communication system. The UAV501 may be stationary above the road, or the position where the UAV stays may be adjusted according to the actual situation.

Fig. 6 schematically shows a flow chart of an information transmission method according to another embodiment of the present disclosure. The method provided by the embodiment of fig. 6 is illustrated as being performed by the second device.

As shown in fig. 6, a method provided by an embodiment of the present disclosure may include:

in S610, metadata is transmitted, so that a first device receives, from a second device, metadata transmitted by the second device and metadata transmitted by the second device through a smart reflective surface, and channel estimation processing is performed according to the metadata received from the second device and the metadata received from the smart reflective 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 smart reflective surface, and a third channel parameter between the smart reflective surface and the second device.

In S620, the transmission signal processed by the target precoding matrix and transmitted by the first device is received by the intelligent reflective surface adjusted to the target parameter.

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 reflective surface according to the second channel parameter, obtain third channel state information between the intelligent reflective surface and the second device according to the third channel parameter, and determine a target reflection phase shift of the intelligent reflective surface and the target precoding matrix 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 a target parameter of the intelligent reflective surface.

Other aspects of the embodiment of fig. 6 may be found in reference to the description of the other embodiments described above.

Fig. 7 schematically shows a flow chart of an information transmission method according to yet another embodiment of the present disclosure. The method provided in the embodiment of fig. 7 is illustrated as performed by a rsu.

As shown in fig. 7, a method provided by an embodiment of the present disclosure may include:

in S710, second device information of a second device and obstacle information between a first device and the second device are collected.

In S720, the second device information and the obstacle information are transmitted 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 reflective surface, and a third channel parameter between the intelligent reflective 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 reflective surface according to the second channel parameter, obtain third channel state information between the intelligent reflective surface and the second device according to the third channel parameter, determine a target reflection precoding phase shift of the intelligent reflective 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 a target parameter of the intelligent reflective surface, and send a precoding signal processed by the target precoding matrix to the intelligent reflective surface as the second channel parameter.

Further details of the embodiment of fig. 7 may be found in relation to the description of other embodiments above.

Fig. 8 schematically shows a flow chart of an information transmission method according to still another embodiment of the present disclosure. The method provided by the embodiment of fig. 8 is illustrated as being performed with a smart reflective surface.

As shown in fig. 8, a method provided by an embodiment of the present disclosure may include:

in S810, metadata transmitted by the second device is received.

In S820, 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 reflective 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 reflective surface, and a third channel parameter between the intelligent reflective 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 reflective surface according to the third channel parameter, and determine a phase shift of the reflective channel state matrix between the intelligent reflective surface and the intelligent reflective surface according to the second channel state information, and the phase shift target reflective channel state matrix of the intelligent reflective surface.

In S830, a target parameter of the intelligent reflective surface is determined according to the target reflection phase shift.

In S840, the transmission signal processed by the target precoding matrix and transmitted by the first device is received.

In S850, the target parameters of the intelligent reflective surface are used to process the transmission signal processed by the target precoding matrix, and the transmission signal is transmitted to the second device.

Other aspects of the embodiment of fig. 8 may be found in relation to the description of the other embodiments described above.

Fig. 9 schematically shows a block diagram of a first device according to an embodiment of the disclosure. As shown in fig. 9, a first device 900 provided in this disclosure may include an obtaining unit 910, a determining unit 920, and a transmitting unit 930.

The obtaining unit 910 may be configured to 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.

The obtaining unit 910 may further be configured to obtain a first channel parameter between the first device and the second device.

The determining unit 920 may be 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.

The determining unit 920 may be further configured to determine a target reflection phase shift of the intelligent reflective surface and a target precoding matrix of the first device according to the first channel state information, where the target reflection phase shift may be used to determine a target parameter of the intelligent reflective surface.

The transmission unit 930 may be configured to transmit the transmission signal processed by the target precoding matrix to the second device through the intelligent reflective surface adjusted to the target parameter.

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 location and the second location; the first channel state information obtaining unit may be configured to obtain 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 located outside the visible area of the ground position, the first height is greater than a first threshold, and the first distance is greater than a second threshold.

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; the obstacle information may further include a third position of the obstacle.

Wherein, the first device 900 may further include: a second distance obtaining unit operable to obtain a second distance between the second device and the obstacle from the second position and the third position; a first threshold determination unit, which may be configured to determine the first threshold according to the second distance, the second height, the third height, and the first distance.

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, which can be used for obtaining a first distance factor and a meteorological factor; a second threshold determination unit may be configured to determine the second threshold based on the first distance factor, the weather factor, the third altitude, and the second altitude.

In an exemplary embodiment, the first device information may include a ground location viewable area of the first device, and a first location; the second device information may include a second location 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.

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 location and the second location; the first channel state information obtaining unit may be configured to obtain first channel state information between the first device and the second device according to the first line-of-sight component if it is determined that the second device is located within the visible area of the ground location according to the second location, the first height is smaller than a third threshold, and the first distance is smaller than a fourth threshold.

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

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

Wherein, the first device 900 may further include: the second distance factor acquisition unit can be used for acquiring a second distance factor and a meteorological factor; a fourth threshold determination unit operable to determine the fourth threshold based on the second distance factor, the weather factor, the third altitude, and the second altitude.

The determining unit 920 may include: a first distance determining unit operable to determine a first distance between the first device and the second device from the first location and the second location; a first channel state information confirming unit, configured to determine that the second device is located outside the visible area of the ground location according to the second location, and the first height is smaller than or equal to a first threshold, or the first distance is smaller than or equal to a second threshold; or determining that the second device is located within the ground position visible area according to the second 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 obtaining 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.

In an exemplary embodiment, the obtaining unit 910 may be further configured to obtain a second channel parameter between the first device and the intelligent reflective surface, and a third channel parameter between the intelligent reflective 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 reflective surface according to the second channel parameter; a third channel state information determining unit, configured to obtain third channel state information between the intelligent reflective surface and the second device according to the third channel parameter; a downlink traversal capacity obtaining unit, configured to obtain a downlink traversal 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 reflected phase shift determination unit operable to determine the target reflected phase shift in dependence on the downlink traversal 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.

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

In an exemplary embodiment, the obtaining unit 910 may include: a device obstacle information receiving unit may be configured to receive the second device information and the obstacle information from a road side unit.

The specific implementation of each unit in the first device provided in the embodiment of the present disclosure may refer to the content in the information transmission method, and is not described herein again.

Fig. 10 schematically shows a block diagram of a second device according to an embodiment of the present disclosure. As shown in fig. 10, the second device provided in the embodiment of the present disclosure may include a transmitting unit 1010 and a receiving unit 1020.

The transmitting unit 1010 may be configured to transmit metadata, so that a first device receives the metadata transmitted by the second device from the second device and the metadata transmitted by the second device through an intelligent reflective surface, and perform channel estimation processing according to the metadata received by the second device and the metadata received by the intelligent reflective 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 reflective surface, and a third channel parameter between the intelligent reflective surface and the second device.

The receiving unit 1020 may be configured to receive the target precoding matrix processed transmission signal transmitted by the first device through the intelligent reflective surface adjusted to the target parameter.

The first device may be 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 reflective surface according to the second channel parameter, obtain third channel state information between the intelligent reflective surface and the second device according to the third channel parameter, and determine a target reflection phase shift of the intelligent reflective surface and the target precoding matrix 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 a target parameter of the intelligent reflective surface.

The specific implementation of each unit in the second device provided in the embodiment of the present disclosure may refer to the content in the information transmission method, and is not described herein again.

Fig. 11 schematically illustrates a block diagram of a roadside unit according to an embodiment of the present disclosure. As shown in fig. 11, a roadside unit 1100 provided by an embodiment of the present disclosure may include: an acquisition unit 1110 and a transmission unit 1120.

The collecting unit 1110 may be configured to collect second device information of a second device and obstacle information between the first device and the second device.

The transmitting unit 1120 may be configured to transmit the second device information and the obstacle information to the first device.

The first device may be 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 reflective surface, and a third channel parameter between the intelligent reflective 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 reflective surface according to the second channel parameter, obtain third channel state information between the intelligent reflective surface and the second device according to the third channel parameter, determine a target reflection phase shift of the intelligent reflective surface and a target matrix of the first device according to the first channel state information, the second channel state information, and the third channel state information, determine a precoding matrix of the intelligent reflective surface, and send a precoding matrix of the intelligent reflective surface to the second device, and send a signal processed by the precoding matrix to the intelligent reflective surface as the second channel parameter.

The specific implementation of each unit in the roadside units provided by the embodiments of the present disclosure may refer to the content in the information transmission method, and is not described herein again.

FIG. 12 schematically illustrates a block diagram of an intelligent reflective surface, according to an embodiment of the present disclosure. As shown in fig. 12, an intelligent reflective surface 1200 provided by the embodiment of the present disclosure may include: a receiving unit 1210, a reflecting unit 1220 and an adjusting unit 1230.

The receiving unit 1210 may be configured to receive the metadata transmitted by the second device.

The reflection unit 1220 may be configured to send metadata received from the second device to a first device, so that the first device performs a channel estimation process according to the metadata received from the second device and the metadata received from the intelligent reflection 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 reflection surface, and a third channel parameter between the intelligent reflection 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 reflection surface according to the second channel parameter, obtain second channel state information between the intelligent reflection surface and the third channel state information according to the third channel parameter, and determine the reflection state matrix of the reflection surface, and determine the reflection state matrix of the target device according to the precoding channel state information, and the phase shift of the reflection matrix.

The adjusting unit 1230 may be configured to determine a target parameter of the intelligent reflective surface according to the target reflection phase shift.

The receiving unit 1210 may further be configured to receive a transmission signal processed by the target precoding matrix and transmitted by the first device.

The reflection unit 1220 may further be configured to process the transmission signal processed by the target precoding matrix using the target parameter of the intelligent reflection surface, and transmit the processed transmission signal to the second device.

The specific implementation of each unit in the intelligent reflection surface provided by the embodiment of the present disclosure may refer to the content in the information transmission method, and is not described herein again.

It should be noted that the electronic device 100 shown in fig. 13 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present disclosure. The electronic device 100 may be, for example, any one or combination of a plurality of communication devices, vehicles, IRS, RSU, and the like in the above embodiments.

As shown in fig. 13, the electronic apparatus 100 includes a Central Processing Unit (CPU) 101 that can perform various appropriate actions and processes in accordance with a program stored in a Read-Only Memory (ROM) 102 or a program loaded from a storage section 108 into a Random Access Memory (RAM) 103. In the RAM 103, various programs and data necessary for system operation are also stored. The CPU 101, ROM 102, and RAM 103 are connected to each other via a bus 104. An input/output (I/O) interface 105 is also connected to bus 104.

The following components are connected to the I/O interface 105: an input portion 106 including a keyboard, a mouse, and the like; an output section 107 including a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, a speaker, and the like; a storage section 108 including a hard disk and the like; and a communication section 109 including a Network interface card such as a LAN (Local Area Network) card, a modem, or the like. The communication section 109 performs communication processing via a network such as the internet. A 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, or the like is mounted on the drive 110 as necessary, so that a computer program read out therefrom is mounted into the storage section 108 as necessary.

In particular, the processes described below with reference to the flow diagrams may be implemented as computer software programs, according to embodiments of the present disclosure. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a computer readable storage medium, the computer program containing program code for performing the method illustrated by the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 109, and/or installed from the removable medium 111. When executed by a Central Processing Unit (CPU) 101, performs various functions defined in the methods and/or apparatus of the present application.

It should be noted that the computer readable storage medium shown in the present disclosure may be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing.

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 separately without being assembled into the electronic device. The computer-readable storage medium carries one or more programs that, when executed by one of the electronic devices, cause the electronic device to implement the method as described in the embodiments below. For example, the electronic device may implement the method shown in fig. 1 or fig. 4 or fig. 6 or fig. 7 or fig. 8. The technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, a touch terminal, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.

Claims

1. An information transmission method, characterized in that the method is performed by a first device; wherein the method comprises the following steps:

acquiring 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;

acquiring 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 reflection surface and a target precoding matrix of the first device according to the first channel state information, wherein the target reflection phase shift is used for determining a target parameter of the intelligent reflection surface;

and sending the sending signal processed by the target precoding matrix to the second equipment through the intelligent reflecting surface adjusted to the target parameter.

2. The method of claim 1, wherein the first device information comprises a ground location visibility region for the first device, and a first location;

the second device information includes a second location of the second device;

the obstacle information includes a first height of the obstacle;

the first channel parameter comprises a first non-line-of-sight component between the first device and the second device;

wherein 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 comprises:

determining a first distance between the first device and the second device from the first location and the second location;

and if the second equipment is determined to be positioned outside the visible area of the ground position according to the second position, the first height is greater than a first threshold value, and the first distance is greater than a second threshold value, acquiring first channel state information between the first equipment and the second equipment according to the first non-line-of-sight component.

3. The method of claim 2, wherein the first device information further comprises a second altitude of the first device;

the second device information further includes a third height of the second device;

the obstacle information further includes a third location of the obstacle;

wherein the method further comprises:

obtaining a second distance between the second device and the obstacle according to the second position and the third position;

determining the first threshold based on the second distance, the second height, the third height, and the first distance.

4. The method of claim 2, wherein the first device information further comprises a second altitude of the first device;

wherein the method further comprises:

acquiring a first distance factor and a meteorological factor;

determining the second threshold from the first distance factor, the weather factor, the third altitude, and the second altitude.

5. The method of claim 1, wherein the first device information comprises a ground location visibility region of the first device, and a first location;

the second device information includes a second location of the second device;

the obstacle information includes a first height of the obstacle;

the first channel parameter comprises a first line-of-sight component between the first device and the second device;

and if the second equipment is determined to be positioned in the ground position visible area according to the second position, the first height is smaller than a third threshold value, and the first distance is smaller than a fourth threshold value, obtaining first channel state information between the first equipment and the second equipment according to the first line-of-sight component.

6. The method of claim 5, wherein the first device information further comprises a second altitude of the first device;

the obstacle information further includes a third location of the obstacle;

wherein the method further comprises:

determining the third threshold based on the second distance, the second height, and the first distance.

7. The method of claim 5, wherein the first device information further comprises a second altitude of the first device;

wherein the method further comprises:

acquiring a second distance factor and a meteorological factor;

determining the fourth threshold from the second distance factor, the weather factor, the third altitude, and the second altitude.

8. The method of claim 1, wherein the first device information comprises a ground location visibility region for the first device, and a first location;

the second device information includes a second location of the second device;

the obstacle information includes a first height of the obstacle;

the first channel parameters include a first line-of-sight component and a first non-line-of-sight component between the first device and the second device;

if the second equipment is determined to be located outside the ground position visible area according to the second position, and the first height is smaller than or equal to a first threshold value, or the first distance is smaller than or equal to a second threshold value; or determining that the second device is located within the ground position visible area according to the second 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 obtaining 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.

9. The method of claim 1, wherein determining the target reflection phase shift of the intelligent reflective surface and the target precoding matrix of the first device based on the first channel state information between the first device and the second device comprises:

acquiring a second channel parameter between the first device and the intelligent reflective surface and a third channel parameter between the intelligent reflective surface and the second device;

obtaining second channel state information between the first device and the intelligent reflecting surface according to the second channel parameters;

obtaining third channel state information between the intelligent reflecting surface and the second equipment according to the third channel parameters;

acquiring downlink traversal 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 traversal 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.

10. The method of claim 9, wherein the second channel parameters comprise a second line-of-sight component and a second non-line-of-sight component between the first device and the intelligent reflective surface;

the third channel parameters include a third line-of-sight component and a third non-line-of-sight component between the smart reflective surface and the second device.

11. The method of claim 9, wherein obtaining first channel parameters between the first device and the second device, second channel parameters between the first device and the intelligent reflective surface, and third channel parameters between the intelligent reflective surface and the second device comprises:

receiving, from the second device, the metadata transmitted by the second device;

receiving, by the smart reflective surface, metadata transmitted by the second device;

and performing channel estimation processing according to 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 of claim 1, wherein obtaining second device information of a second device and obstacle information between the first device and the second device comprises:

receiving the second device information and the obstacle information from a roadside unit.

13. An information transmission method, characterized in that the method is performed by a second device; wherein the method comprises the following steps:

sending metadata so that a first device receives the metadata sent by a second device from the second device and the metadata sent by the second device through an intelligent reflection surface, and performing channel estimation processing according to the metadata received from the second device and the metadata received from the intelligent reflection 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 reflection surface, and a third channel parameter between the intelligent reflection surface and the second device;

receiving a transmission signal which is sent by the first equipment and is processed by a target precoding matrix through the intelligent reflection surface which is adjusted to be a target parameter;

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 reflective surface according to the second channel parameter, obtain third channel state information between the intelligent reflective surface and the second device according to the third channel parameter, and determine a target reflection phase shift and a target precoding matrix of the intelligent reflective 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 a target parameter of the intelligent reflective surface.

14. A method of information transmission, the method being performed by a roadside unit; wherein the method comprises the following steps:

acquiring second equipment information of second equipment and obstacle information between the first equipment and the second equipment;

sending the second device information and the obstacle information to the first device;

15. An information transmission method, characterized in that the method is performed by a smart reflective surface; wherein the method comprises the following steps:

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 reflective 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 reflective surface, and a third channel parameter between the intelligent reflective 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 reflective surface according to the third channel parameter, and determine a phase shift matrix of the first channel state information and the second channel state information between the intelligent reflective surface according to the second channel parameter, and determine a phase shift matrix of the target reflective surface;

determining target parameters of the intelligent reflecting surface according to the target reflection phase shift;

receiving a transmission signal which is transmitted by the first device and processed by the target pre-coding matrix;

and processing the sending signal processed by the target precoding matrix by using the target parameter of the intelligent reflecting surface, and sending the signal to the second equipment.

16. A first device, comprising:

an 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;

the obtaining unit is further configured to obtain a first channel parameter between the first device and the second device;

a determining 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;

the determining unit is further configured to determine a target reflection phase shift of an intelligent reflective 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 a target parameter of the intelligent reflective surface;

and the transmission unit is used for transmitting the transmission signal processed by the target precoding matrix to the second equipment through the intelligent reflecting surface adjusted to the target parameter.

17. An electronic device, comprising:

one or more processors;

storage means configured to store one or more programs which, when executed by the one or more processors, cause the one or more processors to carry out the method of any one of claims 1 to 12 or the method of claim 13 or the method of claim 14 or the method of claim 15.

18. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method of any one of claims 1 to 12 or the method of claim 13 or the method of claim 14 or the method of claim 15.

19. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements the method of any one of claims 1-12; or,

the method of claim 13; or,

the method of claim 14; or,

the method of claim 15.