Performance evaluation of proposed-TCP in Mobile Ad Hoc Networks (MANETs)

Mobile Ad hoc Networks (MANETs) in the form of wireless local area networks is becoming a common platform for communication among internet users. As compared with wired networks, the rate of random packet loss due to wireless channel errors or node mobility is very high in MANET. Misinterpretation of random packet loss as loss due to congestion by TCP causes significant degradation in the performance (i.e. aggregate throughput) of the network. Numerous solutions are proposed in literature, but they either are cross layer solution or focused on specific issues of TCP. In this paper, we present a new energy efficient, end-to-end, layered solution named as “Proposed-TCP”, as transport layer protocol. The “Proposed-TCP” can identify packet loss due to congestion, wireless channel error and route failure, by using multiple end-to-end metrics and handles incipient congestion in the network also. The “Proposed-TCP” is implemented and simulated in Network Simulator (NS2). In order to achieve accuracy in results, the Proposed-TCP is simulated multiple times and compared with TCP Reno, TCP Santa Cruz and ADTCP. For the present analysis, the simulation is carried out by introducing 0%, 5% and 10% random noise. The simulation results show that Proposed-TCP outperforms TCP Reno, TCP Santa Cruz, and ADTCP by producing better performance in terms of throughput and fairness.