Analysis and Comparison of Performance of TCP-Vegas in MANET

Mobile Ad Hoc Network (MANET) is a collection of mobile nodes (MN) that communicate using wireless links with no support from any pre-existing infrastructure network. Packets are delivered from a source to a destination using packet forwarding capabilities of intermediate nodes. Therefore, MNs act as end systems or routers. The purpose of this paper is to analyze and compare the different congestion control and avoidance mechanisms which have been proposed for TCP/IP protocols. TCP is a reliable connection oriented end-to-end protocol and used in MANET for the purpose of smooth integration with the wired network. TCP-Vegas is well-known transport protocol which takes into account existing network conditions. This paper presents effectiveness of the TCP-Vegas with reference to other TCP variants. Through simulations using ns-2, it was observed that packet loss in network using TCP-Vegas is less as compare to other TCP variants. The paper suggests some improvements for better performance.