A Novel Approach to Enhance TCP Throughput in Wireless Sensor Networks

Wireless sensor network add a new wireless structure have been designed to improve the performance of the new communications. Performance of wireless sensor network has a vital dependency to the transport protocols. TCP is a connection oriented and reliable protocol of transport protocol which is developed for wired networks because of some unique characteristics of wireless sensor network like poor resources, poor channel bandwidth and noisy channels and node mobility, performance of TCP is degraded. In this paper a simulation based performance analysis is presented in the term of TCP throughput. The throughput decay of TCP are evaluated in wireless sensor networks and discuss a bout problem that cause this degradation. On the other hand TCP wrongly assumes congestion is the main reason of each packet lost, while packet lost may happen because of wireless sensor networks limitations that is mentioned above. The propose model modify TCP congestion detection module to distinguish between congestion and non congestion situation. It evaluated by simulated results and throughput enhancement verified by NS2.