International Journal of Computer Science Issues

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TCP connections have small bandwidth-delay product and frequent packet loss in wireless sensor networks due to route breakages and radio interference. Datagram transport protocol provides a reliable end-to-end transport protocol over wireless sensor networks. This paper deals with improvement of TCP Fairness as Fairness in wireless sensor networks plays a major role to have maximum fair share of available bandwidth among the nodes, thus energy is consumed. A distributed adaptive max-min algorithm has been proposed in order to improve the fairness in WSNs. The proposed scheme incorporates two techniques: a fixed-size window-based flow-control algorithm and a cumulative bit-vector-based selective ACK strategy. Security has got the major impact over WSNs and that has been overcome by logical Tunneling. The simulation results show the improvement in terms of fairness, throughput and delay and packet loss using Network Simulator NS-2.