Performance Evaluation Of Congestion Control Tcp Variants In Vanet Using Omnet++

A Vehicular Ad-hoc network or VANET is a technology that uses moving cars as node in a network to create a mobile network. A Vehicular Ad-hoc Networks (VANET) is an area of wireless technologies that are attracting a great deal of interest. There are still several areas of VANETS, such as medium access control, security, routing protocols, congestion control that lack large amounts of research. There is also a lack of freely available simulators that can quickly and accurately simulate VANETs. The paper aims to investigate the performance of Congestion Control TCP Variants in VANET by using routing protocols i.e. AODV (Adhoc on Demand Distance Vector) and DSR( Dynamic Source Routing) . Delay and Throughput are the two parameters that are consider to grade the TCP Variants. Conclusions are drawn based on the evaluation results using OMNET++ and SUMO simulator. The results clearly show that New Reno is better than that of Reno but the performance with Tahoe is as that with New Reno Variant except that in a large network size Tahoe achieves less Delay and better Throughput. Furthermore, it can be observed that New Reno is better than that of TCP Reno but cannot be as good as that of Tahoe.