Enhancing Performance of TCP in Multihop Networks

It has been observed that TCP suffers from poor bandwidth utilization and extreme unfairness in wirelessenvironment, and the utility of TCP in the multi-hop IEEE 802.11 network has been seriously questioned.The high transmission errors and varying latency in wireless channel would have a seriously adverseeffect on the performance of TCP. Thus, a novel cross-layer approach with joint congestion andcontention window control scheme and a probabilistic approach for RTT measurement is proposed toimprove the performance of TCP in multi-hop networks. The simulation results show that proposeddesign provides a more efficient solution for frequent transmission loss and enables TCP to distinguishbetween congestion loss and transmission errors, thus to take proper remedial actions to improve TCPperformance in multi-hop network by setting optimal congestion window and updating the window onlyduring congestion.KEYWORDS