An improved AODV routing protocol for VANETs in city scenarios

Vehicular Ad hoc Network (VANET) is a new communication paradigm that enables the communication between vehicles on the road network which falls in two categories: 1) Vehicle to Vehicle (V2V) and 2) Vehicle to Infrastructure (V2I). Various approaches of data dissemination in vehicular Network are used to inform vehicles about dynamic road traffic condition for achieving safe and efficient transportation system. Types of VANET applications and inherent characteristics such as unpredictable node density, fast movement of vehicles, constrained mobility make data dissemination quite challenging and general purpose ad hoc network routing protocols cannot work efficiently with it. In this paper, we propose a routing protocol IAODV (Improved AODV) that ensures giving timely and accurate information to drivers in V2V communication compare to AODV protocols in city scenarios of vehicular ad hoc networks. Proposed IAODV is defined as limited source routing up to two hops with backup route between source node and destination node. The performance of the proposed IAODV protocol is compared with basic AODV protocol in terms of Avg. End-to-End Delay, Packet Loss Ratio, Packet Delivery Ratio and Normalized Routing Load. Simulation results show that IAODV performs better than AODV protocol in given city scenarios of VANETs.