New adaptation method of TCP for mobile ad hoc networks

This paper presents a new approach that tries to adapt the Transmission Control Protocol (TCP) for use in Wireless ad-hoc networks (MANET). In the proposed protocol called Hybrid TCP or H-TCP, we have made some modifications using a cross layer solution to the legacy IEEE 802.11 and TCP. In H-TCP we show that we can obtain better connections on the wireless links, while maintaining the advantages of TCP on the wired networks at the same time. This new outlook confers on TCP a good feature of adapting to wired and wireless environments. We evaluated our approach via simulation with NS3 and compared the results of H-TCP with standard TCP-Reno scheme and a recent improvement of TCP performed on the basis of the signal strength. This comparison is done in terms of transmission time, interferences and mobility of nodes. The numerical results reveal that H-TCP achieves a significant improvement in the TCP transmission performance over mobile multi-hop wireless.