CN115988429A - Message transmission and control method and device thereof - Google Patents

Abstract

The application discloses a message transmission method and a message transmission control device, which are used for solving the problem that coverage areas of a plurality of RSUs are mutually overlapped and mutually interfered due to default maximum transmitting power of the RSUs, and finally the V2X overall communication efficiency is low. The message transmission control method provided by the application comprises the following steps: acquiring position information of a plurality of drive test units (RSUs); and determining a message broadcast range reference value of the RSUs according to the position information of the RSUs, and notifying the RSUs of the message broadcast range reference value.

Description

Message transmission and its control method and device

technical field

The present application relates to the technical field of communications, and in particular to a method and device for message transmission and its control.

Background technique

In the field of Internet of Vehicles, the drive test unit (RSU, which is installed on both sides of the road or on the gantry, and sends the drive test message to the OBU device through V2X wireless communication technology) equipment is responsible for broadcasting the traffic information processed by the signal machine to the surrounding The on-board unit (OBU, an entity unit installed on the vehicle with V2X wireless information collection, processing and sending) is used to remind the attached vehicle to drive safely. , the on-board unit communicates with other devices) message to remind other vehicles in the same lane to avoid. In order to ensure that the traffic information is pushed to the surrounding vehicles in an accurate and timely manner, the RSU will use the default maximum transmission power for broadcast transmission, which can cover up to 500-1000M.

Contents of the invention

The embodiment of the present application provides a message transmission and its control method and device, which are used to solve the problem that the coverage areas of multiple RSUs overlap each other and interfere with each other due to the default maximum transmission power of each RSU, which eventually leads to low overall communication efficiency of V2X. question.

On the side of the V2X platform, a message transmission control method provided in the embodiment of the present application includes:

Obtain the location information of multiple drive test units RSU;

Determine the message broadcast range reference value of the multiple RSUs according to the location information of the multiple RSUs, and notify the multiple RSUs of the message broadcast range reference value.

Obtain the location information of multiple drive test units RSU through this method, and determine the message broadcast range reference value of the multiple RSUs according to the location information of the multiple RSUs, and notify the message broadcast range reference value to all RSUs The plurality of RSUs, so that the plurality of RSUs broadcast the V2X broadcast message according to the reference value of the message broadcast range, thereby solving the problem that the coverage areas of the plurality of RSUs overlap each other and interfere with each other due to the default maximum transmission power of each RSU , which eventually leads to the problem of low overall communication efficiency of V2X.

In some embodiments, the determining the message broadcast range reference value of the multiple RSUs according to the location information of the multiple RSUs includes:

For each of the RSUs, determine the furthest distance between the RSU and the adjacent RSU;

Determine the maximum value among the furthest distances between all the RSUs and adjacent RSUs, and use half of the maximum value as the reference value of the message broadcast range of the multiple RSUs.

In this way, the purpose of dense coverage of the RSU equipment is guaranteed, and the important emergency information cannot be notified to the vehicle-mounted OBU terminal in time due to the non-coverage area between the RSU and the RSU, ensuring that the emergency message can reach the user.

On the RSU side, a message transmission method provided in the embodiment of this application includes:

Obtain the reference value of the message broadcast range of the local drive test unit RSU; wherein the message broadcast range reference value of the RSU is the message broadcast range reference value of the multiple RSUs determined by the V2X platform according to the location information of the multiple RSUs; The plurality of RSUs includes the local RSU;

The V2X broadcast message is broadcast according to the message broadcast range reference value.

In some implementation manners, the broadcasting of the V2X broadcast message according to the message broadcast range reference value includes:

Sending a V2X broadcast message to the OBU according to the message broadcast range reference value;

receiving a feedback message from the OBU for the V2X broadcast message, including the location information of the OBU;

determining the distance between the OBU and the local RSU according to the location information of the OBU;

When the distance is greater than the message broadcast range reference value, and the difference between the distance and the message broadcast range reference value is greater than a preset threshold, reduce the signal transmission gain of the local RSU.

Therefore, the broadcast of V2X messages reaches an optimal state, which not only ensures that there is a small amount of coverage overlap between RSU devices, ensures seamless connection of V2X messages, but also minimizes the interference between each RSU device.

In some implementations, the V2X broadcast message carries an indication that the OBU is required to reply to a feedback message, and the location information of the OBU and the identifier of the local RSU are carried in the feedback message.

In some embodiments, before obtaining the reference value of the message broadcast range of the local drive test unit RSU, the method further includes:

Report the location information of the local RSU to the V2X platform.

On the OBU side, a message transmission method provided in the embodiment of the present application includes:

Receive the V2X broadcast message broadcast by the drive test unit RSU according to the message broadcast range reference value; wherein the message broadcast range reference value is the message broadcast range reference value of the multiple RSUs determined by the V2X platform according to the location information of the multiple RSUs ; The plurality of RSUs includes an RSU that broadcasts the V2X broadcast message;

Reply a feedback message to the RSU, including the location information of the local on-board unit OBU.

On the V2X platform, a message transmission control device provided in an embodiment of the present application includes a memory, a transceiver, and a processor:

The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and execute any one of the message transmission control methods.

On the RSU, OBU side, etc., a message transmission device provided in the embodiment of this application includes a memory, a transceiver, and a processor:

The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and execute any one of the message transmission methods.

Another embodiment of the present application provides a processor-readable storage medium, where a computer program is stored in the processor-readable storage medium, and the computer program is configured to cause the processor to execute any one of the above methods.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

FIG. 1 is a schematic diagram of a system architecture provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of a system architecture provided in an embodiment of the present application;

FIG. 3 is a schematic flowchart of a message transmission control method provided in an embodiment of the present application;

FIG. 4 is a schematic flowchart of a message transmission method provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart of another message transmission method provided by the embodiment of the present application;

FIG. 6 is a schematic diagram of another system architecture provided by the embodiment of the present application;

FIG. 7 is a schematic diagram of the implementation flow of the entire system provided by the embodiment of the present application;

FIG. 8 is a schematic structural diagram of a message transmission control device provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a message transmission device provided by an embodiment of the present application.

Detailed ways

The term "and/or" in the embodiments of the present invention describes the association relationship of associated objects, indicating that there may be three relationships, for example, A and/or B, which may mean: A exists alone, A and B exist simultaneously, and B exists alone These three situations. The character "/" generally indicates that the contextual objects are an "or" relationship.

The term "plurality" in the embodiments of the present application refers to two or more, and other quantifiers are similar.

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The embodiment of the present application provides a message transmission and its control method and device, which are used to solve the problem that the coverage areas of multiple RSUs overlap each other and interfere with each other due to the default maximum transmission power of each RSU, which eventually leads to low overall communication efficiency of V2X. question.

Among them, the method and the device are conceived based on the same application. Since the principle of solving problems of the method and the device is similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

The terms "first", "second", etc. (if any) in the description and claims of the embodiments of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence . It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

The following examples and embodiments are to be understood as illustrative examples only. While this specification may refer to "a," "an," or "some" examples or embodiments in several places, it does not mean that each such reference relates to the same example or embodiment, nor does it mean that This feature applies only to a single example or implementation. Single features of different embodiments may also be combined to provide other embodiments. Furthermore, terms such as "comprising" and "comprising" should be understood not to limit the described embodiments to consisting only of those features mentioned; such examples and embodiments may also contain elements not specifically mentioned. features, structures, units, modules, etc.

The technical solutions provided by the embodiments of the present application can be applied to various systems, especially 5G systems. For example, the applicable system can be Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) general packet radio Business (General Packet Radio Service, GPRS) system, Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD), Advanced Long Term Evolution (Long Term Evolution Advanced, LTE-A) system, Universal Mobile Telecommunications System (UMTS), Worldwide interoperability for Microwave Access (WiMAX) system, 5G New Radio (New Radio, NR) system, etc. These various systems include end devices and network devices. The system may also include a core network part, such as an evolved packet system (Evolved Packet System, EPS), a 5G system (5GS), and the like.

The terminal devices involved in the embodiments of the present application include, for example, vehicle-mounted terminals, devices that provide voice and/or data connectivity to users, handheld devices with wireless connection functions, or other processing devices connected to wireless modems. In different systems, the name of the terminal equipment may be different. For example, in a 5G system, the terminal equipment may be called User Equipment (User Equipment, UE). Wireless terminal equipment can communicate with one or more core networks (Core Network, CN) via RAN, and wireless terminal equipment can be mobile terminal equipment, such as mobile phones (or called "cellular" phones) and computers with mobile terminal equipment , for example, may be portable, pocket, handheld, computer built-in, or vehicle-mounted mobile devices that exchange voice and/or data with the radio access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistant (PDA) ) and other equipment. Wireless terminal equipment can also be called system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point , remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), and user device (user device), which are not limited in this embodiment of the application.

The network device involved in the embodiment of the present application may include a V2X platform, a drive test unit, a base station, etc., where the base station may include multiple cells. Depending on specific application scenarios, a base station may also be called an access point, or may refer to a device in an access network that communicates with a wireless terminal device through one or more sectors on an air interface, or other names. The network device can be used to convert received air frames to and from Internet Protocol (IP) packets and act as a router between the wireless terminal device and the rest of the access network, which can include the Internet Protocol (IP) communication network. Network devices may also coordinate attribute management for the air interface. For example, the network equipment involved in the embodiment of the present application may be a network equipment (Base Transceiver Station, BTS) in Global System for Mobile Communications (GSM) or Code Division Multiple Access (CDMA), or it may be a bandwidth code division multiple access The network equipment (NodeB) in (WCDMA) can also be the evolved network equipment (evolutional Node B, eNB or e-NodeB) in the long-term evolution (LTE) system, and the 5G base station in the 5G network architecture (next generation system) , may also be a Home evolved Node B (HeNB), a relay node (relay node), a home base station (femto), a pico base station (pico), etc., which are not limited in this embodiment of the application. In some network structures, a network device may include a centralized unit (centralized unit, CU) node and a distributed unit (distributed unit, DU) node, and the centralized unit and the distributed unit may also be arranged geographically separately.

One or more antennas can be used between the network device and the terminal device for Multi-Input Multi-Output (MIMO) transmission. The MIMO transmission can be Single User MIMO (Single User MIMO, SU-MIMO) or Multi-User MIMO ( Multiple User MIMO, MU-MIMO). According to the shape and number of root antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or diversity transmission, precoding transmission, or beamforming transmission, etc.

Various embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. It should be noted that the display order of the embodiments of the present application only represents the sequence of the embodiments, and does not represent the advantages or disadvantages of the technical solutions provided by the embodiments.

Referring to Figure 1, RSU generally adjusts the transmission power to the maximum and selects omnidirectional antennas, so that all vehicles within the surrounding 500-1000M range can receive real-time signal lights, traffic warnings and other information broadcast by RSU. At the same time, due to the uneven deployment of RSU devices, there will be a large coverage overlap area, which will also cause unnecessary communication interference to V2X devices in the overlapping area. Compared with the built-in V2X communication interference of the vehicle, the communication efficiency caused by the RSU with higher transmission power is greater.

Therefore, in order to solve the problem that the coverage areas of the RSU and the RSU overlap and interfere with each other due to the default maximum transmission power of the RSU as shown in Figure 1, which eventually leads to the low efficiency of the overall V2X communication, the embodiment of the present application provides message transmission and its The control scheme improves the communication efficiency of V2X devices and avoids interference between RSUs and RSUs.

For example, referring to Figure 2, compared to Figure 1, the solution provided by the embodiment of the present application realizes the intelligent control of the RSU information broadcast range through the system integration of the RSU and the V2X platform and the vehicle-mounted OBU terminal, which not only ensures the effective coverage of the RSU signal , and can avoid to the greatest extent the problem that the RSU’s default transmission power is too high, which causes the signals of V2X devices (each RSU and vehicle OBU terminal) to interfere with each other, and ultimately leads to the problem of reduced transmission efficiency.

The following illustrates the technical solutions provided by the embodiments of the present application from different sides.

Referring to FIG. 3, on the V2X platform side, a method for controlling message transmission provided by an embodiment of the present application includes:

S101. Obtain location information of multiple drive test units RSU;

For example, on the side of the V2X platform, the position information of each RSU in the area under the jurisdiction of the V2X platform is acquired, wherein the position information of the RSU may include the local navigation satellite system (Global Navigation Satellite System, GNSS) module in the RSU. Information about the location of the RSU.

S102. Determine the message broadcast range reference value of the multiple RSUs according to the location information of the multiple RSUs, and notify the multiple RSUs of the message broadcast range reference value.

Among them, the message broadcast range reference value of multiple RSUs is the uniform broadcast range value determined by the V2X platform based on the location information of each RSU in the jurisdiction area, so that each RSURSU in the jurisdiction area follows the message The broadcast range reference value is used to broadcast V2X broadcast messages, avoiding the coverage overlap and mutual interference between RSUs due to the default maximum transmission power of each RSU, which eventually leads to the problem of low overall communication efficiency of V2X, and improves V2X communication performance.

In some embodiments, the determining the message broadcast range reference value of the multiple RSUs according to the location information of the multiple RSUs includes:

For each of the RSUs, determine the furthest distance between the RSU and the adjacent RSU;

Determine the maximum value among the furthest distances between all the RSUs and adjacent RSUs, and use half of the maximum value as the reference value of the message broadcast range of the multiple RSUs.

By determining the farthest distance between each RSU and adjacent RSUs, and determining the maximum value of the furthest distances between all RSUs and adjacent RSUs, and using half of the maximum value as the reference value of the message broadcast range of each RSU, it is guaranteed The purpose of dense coverage of RSU equipment is to prevent the situation that important emergency information cannot be notified to the vehicle-mounted OBU terminal in time due to the non-coverage area between RSU and RSU, and to ensure that emergency information can reach users.

Correspondingly, referring to FIG. 4, on the RSU side, a message transmission method provided in this embodiment of the present application includes:

S201. Acquire the message broadcast range reference value of the local drive test unit RSU; wherein, the message broadcast range reference value of the RSU is the message broadcast range reference value of the multiple RSUs determined by the V2X platform according to the location information of the multiple RSUs ; the plurality of RSUs includes the local RSU;

S202. Broadcast the V2X broadcast message according to the message broadcast range reference value.

In some implementation manners, the broadcasting of the V2X broadcast message according to the message broadcast range reference value includes:

Sending a V2X broadcast message to the OBU according to the message broadcast range reference value;

receiving a feedback message from the OBU for the V2X broadcast message, including the location information of the OBU;

determining the distance between the OBU and the local RSU according to the location information of the OBU;

When the distance is greater than the message broadcast range reference value, and the difference between the distance and the message broadcast range reference value is greater than a preset threshold, reduce the signal transmission gain of the local RSU.

Therefore, as shown in Figure 2, for example, the broadcasting of V2X messages by each RSU reaches an optimal state, which not only ensures a small amount of coverage overlap between RSU devices, ensures seamless connection of V2X messages, but also enables each RSU device to communicate with each other. Interference is minimized.

In some implementations, the V2X broadcast message carries an indication that the OBU is required to reply to a feedback message, and the location information of the OBU and the identifier of the local RSU are carried in the feedback message.

Of course, this embodiment of the present application is not limited to this, and it may also be agreed in advance that the OBU needs to reply a feedback message after receiving the V2X broadcast message, and carry the location information of the local OBU and the identity of the RSU that sent the V2X broadcast message in the feedback message. in the news.

In some embodiments, before obtaining the reference value of the message broadcast range of the local drive test unit RSU, the method further includes:

Reporting the location information of the local RSU to the V2X platform, so that the V2X platform obtains the location information of multiple drive test units RSU; and according to the location information of the multiple RSUs, determines the reference value of the message broadcast range of the multiple RSUs.

Correspondingly, referring to FIG. 5, on the OBU side, a message transmission method provided by the embodiment of the present application includes:

S301. Receive the V2X broadcast message broadcast by the drive test unit RSU according to the message broadcast range reference value; wherein the message broadcast range reference value is the message broadcast range of the multiple RSUs determined by the V2X platform according to the location information of the multiple RSUs A reference value; the plurality of RSUs includes the RSU that broadcasts the V2X broadcast message;

S302. Reply a feedback message to the RSU, including the location information of the local on-board unit OBU.

An illustration of a more specific embodiment is given below.

Referring to FIG. 6, the network architecture provided by this embodiment includes a V2X platform and at least one RSU, and each RSU includes, for example, a 5G module, a DSP, a V2X module, a transmission gain adjustment module, a GNSS module (not shown in FIG. 6 ), and an antenna module. etc. Among them, the 5G module is used to realize the communication between the RSU and the 5G base station through 5G communication technology, and communicate with the V2X platform through the 5G base station and the Internet. The DSP is the main processor and is used to realize the message transmission described in the embodiment of this application; the V2X module is used to generate the V2X broadcast message and send it to the user terminal (such as OBU) through the antenna module. The transmission gain adjustment module is used to adjust the transmission gain of the V2X broadcast message.

This embodiment takes the RSU A device shown in Figure 2 of the system as an example to illustrate the solution, and the surrounding RSU B, C, D, and E are device nodes near RSU A, that is, neighbor nodes.

The specific implementation process is shown in Figure 7. The RSU device will first initialize a series of modules, such as the initialization of the V2X module, 5G module, GNSS module, etc., and then register and log in to the V2X platform. After each RSU device is powered on and initialized, it will report the location information of the RSU device obtained from the Global Navigation Satellite System (GNSS) module to the V2X platform. After receiving the location information of each RSU device, the V2X platform saves it in the database and calibrates the location of each RSU device based on the high-precision map.

According to the high-precision map marking information, the V2X platform sorts out the positional relationship of each RSU device, that is, the neighbor device of each RSU device and the distance from the neighbor device. Take RSU device A as an example to illustrate the solution. RSU B, C, D, and E are its neighbor devices. Calculate the distance between RSU A and the neighbor device respectively. Let Lmax(A) be the farthest distance between the neighbor node and RSU A . By analogy, the V2X platform calculates the maximum distance between each RSU node and its corresponding neighbor node. For example, the maximum distance of RSU B is represented by Lmax(B). Summarize and compare the Lmax(x) of all RSU nodes to take the maximum value, assuming it is max, then max/2 will be used as the benchmark value of the message broadcast range of all RSU devices.

It should be noted that taking half of the maximum value of Lmax(x) of all RSU nodes as the maximum coverage broadcast range is for the purpose of ensuring dense coverage of RSU devices and preventing uncovered areas between RSUs and RSUs, resulting in Important emergency information cannot be notified to the vehicle-mounted OBU terminal in time. This embodiment ensures that there is a small amount of coverage overlap between RSU devices, ensures seamless connection of V2X messages, and minimizes interference.

After the V2X platform calculates the broadcast reference range of all RSUs in the current takeover area, it notifies each RSU in turn, and the RSU adjusts its own signal coverage according to the broadcast reference range (for example, the signal coverage can be adjusted by adjusting the signal transmission gain. Larger, the larger the signal coverage, the smaller the gain, the smaller the signal coverage). When the RSU device sends a V2X broadcast message, it requires the OBU terminal to respond to it, and the feedback message of the reply must include the RSU device ID and the accurate location information of the OBU terminal when receiving the message. Adjust the signal transmission gain based on the continuously received reply information from the OBU device (received the broadcast message from the RSU device at the xx position), if the distance of the received information (assumed to be S) is greater than the broadcast reference value max/2, and the reference value If the difference between max/2 and the current distance S is greater than the preset error range, such as 2m, then the signal transmission gain of the RSU device is reduced through the local transmission gain adjustment module, thereby reducing the signal coverage of the RSU device. Then continue to broadcast V2X messages until the difference between the distance S determined based on the position information reported by the OBU and the reference value max/2 is within the preset error range, then the signal gain adjustment will end, that is, until the distance between the OBU and the local RSU If the difference with the reference value of the message broadcast range is less than or equal to the preset threshold, the transmission gain is no longer adjusted. In order to achieve an optimal state, it not only ensures a small amount of coverage overlap between RSU devices, ensures seamless connection of V2X messages, but also minimizes mutual interference.

In summary, the above-mentioned embodiments provided by the embodiments of the present application provide a system and method for improving the communication efficiency of V2X devices and reducing the power consumption of RSU devices, and realize the broadcasting of RSU information through the system integration of RSU, V2X platform and vehicle-mounted OBU terminal The intelligent control of the range not only ensures the effective coverage of the RSU signal, but also avoids the problem of the V2X device (each RSU and vehicle OBU terminal) signal interference with each other due to the high default transmission power of the RSU to the greatest extent, which eventually leads to a decrease in transmission efficiency.

Moreover, a device for automatically adjusting the transmission gain of the V2X module is also provided, and the on-demand control of the transmission power of the V2X module is realized by adding an attenuation control device (ie, a transmission gain adjustment module) in the RSU.

In addition, it also provides a control method for the RSU broadcast range: confirm the distance information between the RSU and the surrounding RSU through the GNSS position information of the RSU, and then use half of the maximum distance as the initial radiation radius, and gradually fine-tune it through the feedback of the OBU device, and finally reach the goal Optimal value for radiation range.

Based on the same inventive concept, the following introduces the equipment or device provided by the embodiment of the present application, and the explanation or illustration of the technical features that are the same as or corresponding to those described in the above method will not be repeated hereafter.

Referring to FIG. 8, on the network side, for example, on the V2X platform, a message transmission control device provided in this embodiment of the present application includes:

The processor 500 is used to read the program in the memory 520 and execute the following processes:

Obtain the location information of multiple drive test units RSU;

Determine the message broadcast range reference value of the multiple RSUs according to the location information of the multiple RSUs, and notify the multiple RSUs of the message broadcast range reference value.

In some embodiments, the determining the message broadcast range reference value of the multiple RSUs according to the location information of the multiple RSUs includes:

For each of the RSUs, determine the furthest distance between the RSU and the adjacent RSU;

Determine the maximum value among the furthest distances between all the RSUs and adjacent RSUs, and use half of the maximum value as the reference value of the message broadcast range of the multiple RSUs.

The transceiver 510 is used for receiving and sending data under the control of the processor 500 .

Wherein, in FIG. 8 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 500 and various circuits of the memory represented by the memory 520 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. Transceiver 510 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and other transmission media. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 can store data used by the processor 500 when performing operations.

The processor 500 may be a central processing device (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device, CPLD), the processor can also adopt a multi-core architecture.

On the network side, for example, on any RSU side, the structure of a message transmission device provided in the embodiment of this application can also be referred to in Figure 8, that is, when the device with the structure shown in Figure 8 is used as an RSU:

The processor 500 is used to read the program in the memory 520 and execute the following processes:

Obtain the reference value of the message broadcast range of the local drive test unit RSU; wherein the message broadcast range reference value of the RSU is the message broadcast range reference value of the multiple RSUs determined by the V2X platform according to the location information of the multiple RSUs; The plurality of RSUs includes the local RSU;

The V2X broadcast message is broadcast according to the message broadcast range reference value.

In some implementation manners, the broadcasting of the V2X broadcast message according to the message broadcast range reference value includes:

Sending a V2X broadcast message to the OBU according to the message broadcast range reference value;

receiving a feedback message from the OBU for the V2X broadcast message, including the location information of the OBU;

determining the distance between the OBU and the local RSU according to the location information of the OBU;

When the distance is greater than the message broadcast range reference value, and the difference between the distance and the message broadcast range reference value is greater than a preset threshold, reduce the signal transmission gain of the local RSU.

In some implementations, the V2X broadcast message carries an indication that the OBU is required to reply to a feedback message, and the location information of the OBU and the identifier of the local RSU are carried in the feedback message.

In some implementations, before acquiring the message broadcast range reference value of the local drive test unit RSU, the processor 500 is further configured to read the program in the memory 520 and perform the following process:

Report the location information of the local RSU to the V2X platform.

On the terminal side, referring to FIG. 9, for example, on the OBU side, a message transmission device provided in this embodiment of the present application includes:

The processor 600 is used to read the program in the memory 620 and execute the following processes:

Receive the V2X broadcast message broadcast by the drive test unit RSU according to the message broadcast range reference value; wherein the message broadcast range reference value is the message broadcast range reference value of the multiple RSUs determined by the V2X platform according to the location information of the multiple RSUs ; The plurality of RSUs includes an RSU that broadcasts the V2X broadcast message;

Reply a feedback message to the RSU, including the location information of the local on-board unit OBU.

The transceiver 610 is used for receiving and sending data under the control of the processor 600 .

Wherein, in FIG. 9 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 600 and various circuits of the memory represented by the memory 620 are linked together. The bus architecture can also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. Transceiver 610 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, fiber optic cables, etc. Transmission medium. For different user equipments, the user interface 630 may also be an interface capable of connecting externally and internally to required devices, and the connected devices include but not limited to keypads, displays, speakers, microphones, joysticks, and the like.

The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 can store data used by the processor 600 when performing operations.

In some embodiments, the processor 600 can be a CPU (Central Processing Device), ASIC (Application Specific Integrated Circuit, Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array, Field Programmable Gate Array) or CPLD (Complex Programmable Logic Device , complex programmable logic device), the processor can also adopt a multi-core architecture.

The processor is used to execute any one of the methods provided in the embodiments of the present application according to the obtained executable instructions by calling the computer program stored in the memory. The processor and memory may also be physically separated.

It should be noted here that the above-mentioned device provided by the embodiment of the present invention can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect. The part and the beneficial effect are described in detail.

On the V2X platform side, another message transmission control device provided in the embodiment of the present application includes:

A location acquisition unit, configured to acquire location information of a plurality of drive test units RSU;

The reference value determining unit is configured to determine the message broadcast range reference value of the multiple RSUs according to the location information of the multiple RSUs, and notify the message broadcast range reference value to the multiple RSUs.

In some embodiments, the determining the message broadcast range reference value of the multiple RSUs according to the location information of the multiple RSUs includes:

For each of the RSUs, determine the furthest distance between the RSU and the adjacent RSU;

Determine the maximum value among the furthest distances between all the RSUs and adjacent RSUs, and use half of the maximum value as the reference value of the message broadcast range of the multiple RSUs.

On the RSU side, another message transmission device provided in the embodiment of this application includes:

The reference value acquisition unit is configured to obtain the message broadcast range reference value of the local drive test unit RSU; wherein, the message broadcast range reference value of the RSU is determined by the V2X platform according to the location information of the multiple RSUs. A message broadcast range reference value; the plurality of RSUs includes the local RSU;

A broadcast unit, configured to broadcast a V2X broadcast message according to the message broadcast range reference value.

In some implementation manners, the broadcasting of the V2X broadcast message according to the message broadcast range reference value includes:

Sending a V2X broadcast message to the OBU according to the message broadcast range reference value;

receiving a feedback message from the OBU for the V2X broadcast message, including the location information of the OBU;

determining the distance between the OBU and the local RSU according to the location information of the OBU;

When the distance is greater than the message broadcast range reference value, and the difference between the distance and the message broadcast range reference value is greater than a preset threshold, reduce the signal transmission gain of the local RSU.

In some implementations, the V2X broadcast message carries an indication that the OBU is required to reply to a feedback message, and the location information of the OBU and the identifier of the local RSU are carried in the feedback message.

In some embodiments, before obtaining the reference value of the message broadcast range of the local drive test unit RSU, the reference value acquisition unit is also used to:

Report the location information of the local RSU to the V2X platform.

On the OBU side, a message transmission device provided in the embodiment of the present application includes:

The receiving unit is configured to receive the V2X broadcast message broadcast by the drive test unit RSU according to the message broadcast range reference value; wherein the message broadcast range reference value is determined by the V2X platform according to the location information of the multiple RSUs. A message broadcast range reference value; the plurality of RSUs includes the RSU that broadcasts the V2X broadcast message;

A feedback unit, configured to reply a feedback message to the RSU, including the location information of the local on-board unit OBU.

It should be noted that the division of units in the embodiment of the present application is schematic, and is only a logical function division, and there may be another division manner in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, server, or network device, etc.) or a processor (processor) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

It should be noted here that the above-mentioned device provided by the embodiment of the present invention can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect. The part and the beneficial effect are described in detail.

An embodiment of the present application provides a processor-readable storage medium, the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute any method provided in the above-mentioned embodiments of the present application .

The processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including but not limited to magnetic storage (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor memory (such as ROM, EPROM, EEPROM, non-volatile memory (NANDFLASH), solid-state disk (SSD)), etc.

The embodiment of the present application also provides a computer program product or computer program, where the computer program product or computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device executes any method described in the above-mentioned embodiments. The program product may reside on any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: electrical connection with one or more conductors, portable disk, hard disk, random access memory (RAM), read only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above.

It should be understood that:

The access technology via which entities in the communication network communicate traffic to and from may be any suitable current or future technology, such as WLAN (Wireless Local Access Network), WiMAX (Worldwide Interoperability for Microwave Access), LTE, LTE -A, 5G, bluetooth, infrared, etc.; in addition, the embodiment can also apply wired technology, for example, IP-based access technology, such as wired network or fixed line.

Embodiments adapted to be implemented as software code or a portion thereof and run using a processor or processing function are independent of software code and may be specified using any known or future developed programming language, such as a high-level programming language, such as objective -C, C, C++, C#, Java, Python, Javascript, other scripting languages, etc., or low-level programming languages such as machine language or assembler.

The implementation of the embodiments is hardware independent and can be implemented using any known or future developed hardware technology or any mixture thereof, such as microprocessor or CPU (Central Processing Unit), MOS (Metal Oxide Semiconductor), CMOS (Complementary MOS), BiMOS (Bipolar MOS), BiCMOS (Bipolar CMOS), ECL (Emitter Coupled Logic) and/or TTL (Transistor-Transistor Logic).

Embodiments can be implemented as a single device, device, unit, component or function, or in a distributed fashion, for example, one or more processors or processing functions can be used or shared among processes, or can be used in a process and share one or more processing segments or processing sections, wherein one physical processor or more than one physical processor may be used to implement one or more processing sections dedicated to a particular process as described.

An apparatus may be realized by a semiconductor chip, a chipset or a (hardware) module comprising such a chip or chipset.

Embodiments can also be implemented as any combination of hardware and software, such as ASIC (Application Specific IC (Integrated Circuit)) components, FPGA (Field Programmable Gate Array) or CPLD (Complex Programmable Logic Device) components, or DSP (Digital Signal processor) components.

Embodiments can also be implemented as a computer program product comprising a computer-usable medium having embodied therein computer-readable program code adapted to perform the processes described in the embodiments, wherein the computer-usable medium can is a non-transitory medium.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (10)

1. A message transmission control method, comprising:

acquiring position information of a plurality of drive test units (RSUs);

and determining a message broadcast range reference value of the RSUs according to the position information of the RSUs, and notifying the RSUs of the message broadcast range reference value.

2. The method of claim 1, wherein determining the message broadcast range reference value for the plurality of RSUs according to the location information of the plurality of RSUs comprises:

for each RSU, determining the farthest distance between the RSU and the adjacent RSU;

determining a maximum value of the maximum distances from all the RSUs to the adjacent RSUs, and taking half of the maximum value as a message broadcasting range reference value of the plurality of RSUs.

3. A method for message transmission, the method comprising:

acquiring a message broadcast range reference value of a local drive test unit (RSU); the message broadcast range reference value of the RSU is determined by the V2X platform according to the position information of the RSUs; the plurality of RSUs comprises the local RSU;

and broadcasting the V2X broadcast message according to the message broadcast range reference value.

4. The method of claim 3, wherein the broadcasting of the V2X broadcast message according to the message broadcast range reference value comprises:

according to the message broadcasting range reference value, sending a V2X broadcasting message to an on-board unit (OBU);

receiving a feedback message of the OBU aiming at the V2X broadcast message, wherein the feedback message comprises the position information of the OBU;

determining the distance between the OBU and the local RSU according to the position information of the OBU;

and when the distance is greater than the message broadcasting range reference value and the difference between the distance and the message broadcasting range reference value is greater than a preset threshold, reducing the signal transmission gain of the local RSU.

5. The method of claim 3, wherein the V2X broadcast message carries an indication that the OBU is required to reply to a feedback message, and wherein the location information of the OBU and the identity of the local RSU are carried in the feedback message.

6. The method of claim 3, wherein before obtaining the message broadcast range reference value of the local drive test unit (RSU), the method further comprises:

and reporting the position information of the local RSU to the V2X platform.

7. A method for message transmission, the method comprising:

receiving a V2X broadcast message broadcasted by a drive test unit (RSU) according to a message broadcast range reference value; the message broadcasting range reference value is a message broadcasting range reference value of a plurality of RSUs determined by a V2X platform according to position information of the RSUs; the plurality of RSUs comprises RSUs that broadcast the V2X broadcast message;

and replying a feedback message to the RSU, wherein the feedback message comprises the position information of the local on-board unit (OBU).

8. A message transmission control device, comprising a memory, a transceiver, a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and executing the method of claim 1 or 2.

9. A message transmission apparatus, comprising a memory, a transceiver, a processor:

a memory for storing a computer program; a transceiver for transceiving data under the control of the processor; a processor for reading the computer program in the memory and performing the method of any of claims 3 to 7.

10. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing a processor to perform the method of any one of claims 1 to 7.

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