Design of High Probability & Low-Overhead Propagation Mechanism for Beacons in VANET

Vehicular Communication Systems are an emerging t ype of networks in which vehicles and roadside units are the communicating nodes; providing each other with information, such as safety warnings and traffic information. VANET is a self-organized n e t wo r k , connecting the ve h i c l e s and RSUs, and the RSUs can be connected to a backbone network, so that many other network applications and services, including Internet access, can be provided to the vehicles. VANET is a promising wireless communication technology for improving highway safety and information services. The main goal of inter-vehicle communication technologies is to provide each vehicle with the required information about its surrounding in order to assist the driver avoiding potential dangers. Immediate benefits of vanet are preventing accidents and avoiding traffic jam. If a car spots a dangerous road situation, such as an accident, it transmits the information to cars behind it that might be heading in the direction of the danger. A major research area is how to control such disbursing of data and how to ensure safety delivery of such messages. It should not be transmitted to cars that are driving away from the danger or to cars on the other side of town. This is the kind of problem that need to be addressed when choosing the protocol that will be used. The protocol will need to invisibly ensure the necessary data is transmitted or disseminated with high probability and less delay. This paper deals with an algorithm that modifies an existing protocol, that is well suited for quick transmission of traffic alerts or congestions to every vehicle that passes through an emergency zone