Performance Evaluation of Modified AODV Routing Algorithm using WiMAX in VANET Environment

ABSTRACT Vehicular Ad-hoc Network is a leading technology to improve driving experience in terms of providing applications such as safety applications, comfort applications and commercial applications similar to the ad-hoc network. In VANET each vehicle performs as a mobile node. There are two types of communications; vehicular-to-vehicular and vehicular-to-infrastructure which is supported by wireless network technologies. Choosing a routing protocol is a very important part of any network because finding the best convenient route through which a source node can send the data to the destination node, is the biggest challenging task. Broadcast storm, network partition, and temporal fragmentation are some issues in the Vehicular ad-hoc network. A modified AODV routing algorithm has been proposed to conquer these issues. In this algorithm, we use WiMAX base stations instead of using RSUs. The simulation of this modified algorithm has been done using the NS-2 simulator. The performance of the modified AODV algorithm has been evaluated by performance matrix which includes: packet delivery ratio, throughput and average end-to-end delay with respect to the number of nodes. The results of the modified AODV algorithm are compared with AODV which shows significant improvement.