An Enhanced TCP Congestion Control Algorithm for Wired/Wireless Networks

TCP's one of the main tasks is to react and avoid network congestion. A wide literature is available regarding the behavior of congestion control algorithms in many different scenarios and various congestion control algorithms have been proposed in order to improve performances in specific scenarios. In this paper, modifications proposed to the TCP Westwood congestion control algorithm so that it performance would enhanced. TCP Westwood (TCPW) is sender side modification of the congestion window algorithm that improves upon the performance of TCP Reno in wired as well as wireless networks. Some statistical counters have been used for RTT measurement to check the congestion occurrence or packet transmission error in wireless network. This proposed algorithm is tested using the Network Simulator version-2 (ns-2). Moreover, the algorithm is end-to-end in nature and modifies only TCP sender's algorithm.