Performance Analysis of MANETs Routing Protocols under TCP variants with Mobility Consideration

Mobile Ad Hoc Network (MANET) is a self-organizing, self-configuring, and dynamic topology autonomous networks of mobile nodes in an infrastructure-less environment. Due to ad hoc networks have several salient characteristics, for example, dynamic topologies, asymmetric link characteristics, multi-hop communication, decentralized operation, bandwidth-constrained variable-capacity links and energy constrained operation. In order to facilitate communication within MANET in efficiency way, a routing protocol is used to discover routes between the mobile nodes. In MANET, temporary link failures and route changes happen frequently. Assuming that all packet losses are due to congestion, Transport Control Protocol (TCP) performs poorly in such an environment. Many TCP variants have been developed for the improved performance of communication in MANET. Simulations were carried out using Network Simulator-2 (NS-2), the mobility scenario models are generated by BonnMotion, and the selected MANET Routing protocols. Ad hoc On-demand Distance vector (AODV) and Destination sequenced distance vector (DSDV) were analyzed in accordance with their best performance packet delivery rate, average end-to-end delay, and packet dropping, under TCP Vegas with mobility considerations.he simulation results indicate that AODV has a better throughput performance and low average end-to-end delay compared with DSDV. With simulations of various adoc network scenarios, it observes that when both TCP variants coexist in the same wireless ad hoc network, TCP Vegas generally dominates to obtain more throughputhan the competing TCP Reno.