VEHICULAR AD HOC NETWORK

Abstract

Routing in a vehicular ad hoc network is a challenge because of the high mobility of the nodes of the network. Nodes that are situated in vehicles move in different directions at different speeds. In a vehicular ad-hoc network speed of movement is therefore an issue of major concern. As nodes may also include stationary towers, scaling all the nodes in a fixed pattern is not possible. The speed of each node has to be considered. The speed of the nodes should be the scale to determine the hold-on time & update interval time as vehicles may move in and out of range very quickly. In this paper we present the existing routing protocols of wireless ad-hoc network. Also demonstrated the performance of proactive & reactive method through simulation results to show how efficiently they work with high speed nodes. The simulation results show that reactive protocol has a low overhead of control messages but latency is high on the other hand proactive protocol latency is low and routing happens on time. Given the advantages and disadvantages of each type of protocol when speed is taken as a factor we propose a hybrid protocol where proactive and reactive procedure will work in parallel to benefit from the advantages of each. We mainly emphasize on the amount of time a node will stay inside another nodes network zone and speed of every individual node. We have named of our proposed protocol as Speed Based Routing Protocol. The hybrid protocol would be able to track high-speed node and reduce connection drop. The next step would be constructing a simulator that can test the proposed hybrid protocol.