Impact of routing protocol on performance of wireless ad hoc vehicular network

Vehicular Ad Hoc Network (VANET) is an emerging new technology integrating ad hoc network, wireless LAN (WLAN) and cellular technology to achieve intelligent inter-vehicle communications and improve road traffic safety and efficiency. VANETs are distinguished from other kinds of ad hoc networks by their hybrid network architectures, node movement characteristics, and new application scenarios. Therefore, VANETs pose many unique networking research challenges, and the design of an efficient routing protocol for VANETs is very crucial. In this paper, we discuss the impact of routing protocol on performance of wireless ad hoc vehicular network along with recent routing protocols. Ad hoc network characteristics are explained in brief. We propose a routing framework based on the enhanced cooperation between the medium access layer and network layers. An algorithm is discussed which takes onto account position, direction and speed of vehicles .Then this concept is applied to reactive routing protocol and introduced preliminary simulation results using ns-2.It is observed that network performance gets improved