An Efficient Congestion Control Protocol for Wired/Wireless Networks.

Recently, wide spectrum of heterogeneous wireless access networks integrate with high speed wired networks to deliver Internet services. End-to-end service delivery with satisfactory quality is challenging issue in such network architectures. Although the Internet transport control protocol (TCP) addresses such challenge, it has poor performance with high speed wired networks (i.e. high bandwidth-delay product). Moreover, it behaves badly with wireless access networks (i.e. misinterpretation of packet loss occurrence that could be interpreted in wrong way as network congestion). Thus, adapting TCP in terns of accurate interpretation of network status has drawn a significant attention. This paper addresses the problem of adapting congestion window size as an interpretation of frequent fluctuations of network load. The work in this paper proposes congestion window size (cwnd) adjustment in terms of instantaneous network load (i.e. bandwidth estimation). The aims are to improve End-to-End TCP throughput as well as maximum resource utilization. With different scenarios, NS-2 simulator has been adopted to evaluate proposed TCP protocol. Notable improvement has been demonstrated by comparing proposed protocol to TCP NewReno benchmark and TCP Vegas.