Rapid broadcasting method based on position information in vehicular network

Abstract

The invention discloses a rapid broadcasting method MCAB (Multi-candidates-based adaptive Broadcast Algorithm) based on position information in a vehicular network. The method solves the problems that in a VANET, transmission of the broadcast information is greatly delayed and reliability is poor. According to the method, a plurality of vehicles are taken as candidate transmitting vehicles to reduce source point retransmittsion frequency, meanwhile the vehicles can select a broadcast mechanism which is adopted in a self-adaptive mode according to positions of the vehicles including crossings or road segments, accordingly the broadcast method has great flexibility, time delay is reduced and reliability is guaranteed. According to the method, broadcast is divided into crossing broadcast and single road segment broadcast, when the vehicles are located on the crossings or the road segments, absolute position information of the vehicles must be obtained in advance, so the fact that all the vehicles are provided with GPS navigation systems is required. The method is adopted based on the premise that the position information, the moving direction, the current speed, the accelerated speed, road segment IDs and other information can be obtained through the GPS navigated systems.

Description

technical field [0001] The invention relates to the technical field of vehicular networks, in particular to a fast broadcast method based on location information in a vehicular ad hoc network. Background technique [0002] Since entering the 21st century, with the continuous increase of the number of automobiles, automobiles have played an increasingly important role, and the accompanying traffic problems have also attracted more and more attention. Road traffic accidents have become a global public safety issue, and traffic accidents are known as "the world's number one killer" because of their extremely strong "lethality" [1] According to statistics, more than 1.2 million people die in traffic accidents in the world every year, while China owns 1.9% of the world's cars, but the traffic deaths caused by it account for 15% of the world's total, and the traffic accident death rate ranks first in the world. Relevant studies have shown that if drivers can keep abreast of the s...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of large delay and poor reliability in the transmission of broadcast information in VANET, the present invention proposes a fast broadcast me

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