An Enhanced TCP Corruption Control Mechanism For Wireless Network

Mobile Ad Hoc networks are collections of mobile nodes, dynamically forming a temporary network without pre-existing network infrastructure or centralized administration. Transmission control protocol (TCP) provides connection oriented, reliable and end to end mechanism. Comparing to wire networks, there are many different characteristics in wireless environments. In this paper an improved mechanism for TCP corruption control is presented. It considers the influences sending rate to TCP sender's packet not only by the congestion but also by the corruption. The sending window size calculated after each transmission, based on number of corrupted packet. So, there is less packet drop in transmission. The comparative study of Enhanced TCP (ETCP) with other TCP variants is also presented on various parameters like mobility, size of network and the speed. The improved mechanism is implemented with fewer overheads and is effectively improve reliability with small variances of throughput and delay. Implementation and Simulation is performed in QualNet 4.0 simulator.