Abstract:

Because Westwood algorithm can not distinguish wireless random packet loss and network congestion packet loss, we propose an improved algorithm Westwood-c, add the packet loss distinguish mechanism and improve the additive increase mechanism on the basis of the original algorithm, The paper sets congestion window Pcwnd by comparing the backlog beta message number N and setting value β of threshold making the network throughput maintain a high level, improving the network resource utilization.In NS-2 (Network Simulatorversion-2) simulation environment, comparing with the throughput of Westwood-c algorithm and Westwood algorithm under different scenarios. The results show that the Westwood-c algorithm throughput has increased significantly.

Key words: transmission control protocol (TCP), TCP Westwood algorthm, network congestion, wireless networks, network simulatorversion-2(NS-2)