QoS Evaluation of VANET Routing Protocol

In today's smart revolutionary era, Intelligent Transportation System (ITS) is a buzzword that plays a vital role. Vehicular ad-hoc network (VANET) techniques help ITS for improving efficiency as well as road safety services to vehicles and drivers. The vehicle acts as a node in the special ad-hoc network. Communication in the VANET is accomplished through IEEE802.11p i.e. Dedicated Short Range Communication (DSRC) and Wireless Access Vehicular Environment (WAVE). The ways of communication in the VANET are within vehicles (V2V) and vehicle-to-road (V2R). Routing is a foremost issue in the VANET environment due to the dynamic variation of topology, the restricted movement pattern of the vehicle, unstable links and complex city environments. Implementation of the VANET environment is a difficult task in a real environment. The objective of the paper is to simulate topological routing protocols to evaluate QoS. The simulation uses ManhattanGrid mobility to reflect the realistic vehicular environment. The simulation is conducted in various test environments with the variation in the vehicular density and speed of the vehicle. The influence of both factors on the QoS parameter is evaluated with Packet Delivery Ratio, Throughput, Avg. E2ED and Normalized Routing Overhead. AODV produces better PDR, Throughput and less NRL. OLSR produces less Avg. E2ED with respect to other protocols.