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Vehicular Ad-Hoc network mainly involves Vehicle to Vehicle (V2V) and Vehicle to Infrastructure (V2I) communication. This communication facilitates in reducing number of accidents, avoiding traffic congestion, enhancing the transport facility with the aid of infotainment and entertainment application. One of the major challenges of VANET application is in routing the packet in efficient and effective manner since the network topology is dynamic. In this paper we present Distance Based Routing (DBR) protocol designed especially for Vehicular Ad hoc Networks (VANET). The proposed algorithm adopts both position based and map based routing technique. In DBR, a connectivity graph based on the intervehicular distance, the duration of connectivity between neighbouring vehicles and the information from the digital map are collectively used to route the data. In proposed protocol the network traffic is reduced due to the relative position information of the neighbouring vehicle. The stability of the route path is high due to intervehicular distance based next hop selection technique as implemented in this protocol. The proposed routing protocol is simulated using NS2 simulator to analyze the efficiency and effectiveness of the protocol.
M. Ramakrishna (Sun,) studied this question.