GEOCAST ROUTING IN VEHICULAR AD-HOC NETWORKS

Abstract

VANET is an emerging communication technology where it facilitates users and communication devices to have free mobility. It is a special case of MANET where it differs in high speed vehicle mobility and fast topology changes. Pertaining to services like safety-related warning, road traffic information plays a vital role for evolution of VANET. This contain several constraints related to network architecture, protocols for physical and link layer and mainly routing algorithms in network layer, respectively. Topology varies frequently with movements of vehicle. Caching of packets to be delivered becomes a major concern for VANET as devices are restricted to local storage capacity, dedicated processing power and other significant resources. Apart from the above stated issues validity of packet copies in cache is vulnerable to packet and path loss. For successful packet delivery we are proposing a novel geocast routing protocol named “Improved Caching using Full Transmission Range” or ICFTR which uses novel coverage determination to improve the caching methodology and eliminates network traffic and the packet losses due to high speed vehicle movements. The protocol enables full radio transmission range of the vehicle to forward the packets and improves the throughput of the system by eliminating range forwarding approach.