Simulation based Analysis of TCP Variants over MANET Routing Protocols using NS2

Abstract

Traditional Transport Layer Protocol Transport Control Protocol (TCP) and User Datagram Protocol (UDP) which perform well on wired networks, but it degrades its performance in case of Ad-hoc wireless networks due to the existing problems associated such as misinterpretation of packet loss, frequent path breaks, effect of path length, misinterpretation of congestion windows, asymmetric link behaviour, uni-directional path, multipath routing and the use of sliding-window-based transmission. So, to provide reliable data communication support over MANET's, various TCP variants i.e. basically enhancement of base TCP protocols has been proposed. This research work aims to evaluating the simulation based comparison of two TCP variants, which are TCP Vegas and TCP Westwood on different routing protocols such as AODV, DSDV and DSR on the basis of average throughput, packet delivery ratio, average delay, routing overhead and average jitter with the use of ns2 simulator.

Fairness Comparison of TCP Variants over Proactive and Reactive Routing Protocol in MANET

“…From Table 2, we can also see that Vegas cause's unfair distribution of throughput due to path changes so frequently results in the change of baseRTT. Although TCP Vegas privileges to have better throughput than other TCP Variants on MANET [10], [30], [31] with AODV [9], [32] than DSDV and DSR routing protocol. Our studies show that all TCP variants gives better throughput with DSDV routing protocol as shown in Table 2.…”

The Impact of TCP Congestion Window Size on the Performance Evaluation of Mobile Ad Hoc (Manet) Routing Protocols

“…The route establishment is essential to perform the routing process properly. MANET routing protocols can be categorized into [3,4]:…”