Vehicle network along the road node positioning system

Abstract

The invention relates to a system used for positioning nodes along a road in an Internet of vehicles. The system is composed of a vehicle-mounted positioning information broadcasting device and sensing nodes arranged along the road; the vehicle-mounted positioning information broadcasting device is provided with a vehicle positioning unit, a control processing unit, a radio frequency unit and two directional antennas. Processing on broadcast radio frequency signals by a certain sensing node includes the following steps that: S1, analytic processing is performed on broadcast packets; S2, the distance between a location where received broadcast frame signals are transmitted and the sensing node is calculated; S3, broadcast frames are stored in a broadcast frame recording list sequentially; and S4, the driving state of a vehicle is analyzed according to the broadcast frame receiving condition in the broadcast frame recording list, whether the vehicle drives away from the communication range of the sensing node is judged, if the vehicle does not drive away from the communication range of the sensing node, the sensing node waits for receiving new broadcast frame signals, and the processing process returns to the step S1, otherwise, the location coordinates of the sensing node are calculated. With the system of the invention adopted, the location coordinates of the nodes can be obtained simply and accurately.

Description

technical field [0001] The invention belongs to the technical field of the Internet of Vehicles, and in particular relates to a node positioning system for the Internet of Vehicles along the road which assists sensing nodes on both sides of the road in the Internet of Vehicles to locate. Background technique [0002] The Internet of Vehicles is a specific form of the Internet of Things applied to the field of vehicle transportation. It has more characteristics such as initiative, interactivity, real-time and accuracy, and has become a hot spot in industrial development and scientific research. [0003] The focus of the Internet of Vehicles is the interaction of vehicle and vehicle road information. The interaction of road information includes the collection and processing of detection information such as air, mountains, rivers, and road and bridge facilities along the road. On the one hand, a large number of wireless communication nodes need to be set up to sense air quality...

AI Technical Summary

Problems solved by technology

Although some studies use directional antennas to locate nodes in a mobile environment, the problem that these methods cannot overcome is that when the vehicle is driving along a straight track, the sensing node cannot obtain the unique position coordinates from the information broadcast by the vehicle, so it is necessary to use neighbors Node-assisted positioning, this kind of method needs to increase the communication protocol and the number of interactions, and there is also a method to discuss and formulate a special moving route to ensure that the positioning coordinates are unique. Part of the area is linear, and it is difficult to achieve arbitrary steering, so the practicality of this type of method is limited

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