Comparative Performance of Different TCP Variants Over Routing Protocols In MANET Using NS2

Adhoc network is a collection of mobile nodes and wireless communication network is used to connect these mobile nodes. This type of network is known as MOBILE ADHOC NETWORK (MANET). TCP (Transmission Control Protocol) was designed to provide reliable end to end delivery of data over unreliable network. Traditionally TCP assumes that all the packet losses are due to congestion. Most TCP deployments have been carefully designed in the context of wired networks. Ignoring the properties of wireless Adhoc networks can lead to the implementations with poor performance. In order to adapt TCP to wireless network, improvements have been proposed in the literature to detect different types of losses. Indeed, in mobile or static Adhoc networks losses are not always due to network congestion, as it is in case of the wired networks. So, we presented some simulations analysis of TCP, TCP New Reno, TCP SACK, TCP Vegas, and TCP Westwood over DSDV, DSR and AODV in ns2