INTERNATIONAL JOURNAL FOR INNOVATIVE RESEARCH IN MULTIDISCIPLINARY FIELD

Abstract:  In Mobile Ad hoc Networks (MANETs), congestion mainly arises due to node mobility, which leads to frequent packet loss and repeated retransmissions. To enhance the performance of conventional TCP, several variants such as TCP Tahoe, TCP Reno, TCP New Reno, TCP SACK, and TCP Westwood have been developed. TCP Westwood employs a modified congestion control mechanism that reduces delay-based congestion and achieves improved performance. Key performance metrics such as throughput, packet delivery rate, and end-to-end delay show noticeable improvement with the Westwood approach. However, further enhancements are necessary to optimize other parameters, including jitter delay and bandwidth fairness. This paper examines various enhanced versions of TCP Westwood, such as Westwood-A, Adaptive Westwood, and ARTA Westwood. Among these, ARTA Westwood demonstrates superior performance in improving bandwidth fairness compared to the standard Westwood algorithm.