Heterogeneous vehicle ad-hoc network safety detecting and message broadcasting method implemented by aid of coverage hole supplementary transmission mechanisms

Abstract

The invention discloses a heterogeneous vehicle ad-hoc network safety detecting and message broadcasting method implemented by the aid of coverage hole supplementary transmission mechanisms. The heterogeneous vehicle ad-hoc network safety detecting and message broadcasting method includes judging whether on board units are positioned in heterogeneous vehicle ad-hoc networks or not, and broadcasting beacon information if the on board units are positioned in the heterogeneous vehicle ad-hoc networks; receiving periodic update beacon information, judging whether safety application messages need to be broadcast and received or not, and supplementarily transmitting the blocked safety application messages by the aid of coverage holes. The heterogeneous vehicle ad-hoc network safety detecting and message broadcasting method has the advantages that delivery of the safety application messages is decided by the aid of non-redundant coverage distances and forward probability, the safety application messages can be supplementarily transmitted to vehicles by the aid of the coverage holes, the vehicles are positioned in the coverage holes, accordingly, delivery of the safety application messages can be further improved, and safe running of the vehicles can be improved.

Description

technical field [0001] The present invention relates to a routing method of a vehicle network, more particularly, to a security detection and message broadcasting method of a heterogeneous vehicle network using a coverage hole supplementary transmission mechanism. Background technique [0002] Vehicle Ad-hoc Network (VANET) consists of the on-board unit (OBU) carried by the vehicle, the roadside unit (RSU) deployed on the roadside, the control or service center on the Internet, and the personal A system composed of portable electronic devices, etc. It includes three basic communication modes: communication between vehicles (V2V, Vehicle-to-Vehicle), communication between vehicles and roadside units (V2I, Vehicle-to-Infrastructure or I2V, Infrastructure-to -Vehicle) and communication between vehicles and people (V2P, Vehicle-to-people). The in-vehicle network transforms all driving vehicles into mobile wireless nodes or routers, and uses short-term communication within hund...

AI Technical Summary

Problems solved by technology

When solving the channel congestion problem caused by periodic one-hop messages, many researchers have proposed methods to reduce power and communication radius. These methods actively change the communication radius, causing the actual vehicle network to be in a heterogeneous state.

[0007] (2) There is no uniform standard for the production of vehicle-mounted units, which makes the communication radius of vehicle-mounted units different from the beginning, resulting in the fact that the vehicle-mounted network is actually a heterogeneous vehicle-mounted network

[0009] Due to the emergence of heterogeneous vehicular networks, traditional routing methods cannot meet the needs of heterogeneous vehicular networks

However, due to the asymmetry of node communication in the heterogeneous vehicle network, traditional routing protocols cannot achieve very good results in the delivery success rate and propagation delay of security application messages. In the coverage hole, the delivery success rate of security application messages will become lower, which will affect the safe driving of vehicles

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