Throughput improvement for wireless multihop networks with LRED

Abstract

For the last decade, many manufacturer and engineer are interested in wireless multihop networks for reducing cost of the configuration of the networks. But in wireless multihop networks, end-to-end throughput is degraded when the hops of the networks are growing. Furthermore, not only hop by hop throughput in data link layer but also end-to-end TCP throughput is suffered from the hidden node problem, so that their performance is very poor. In this paper, we proposed the method to improve TCP end-to-end throughput by modifying the mechanism of the MAC transmission that is link random early detection (LRED) based on throughput analysis. With the proposed method, we show that the end-to-end throughput is improved and congestion window size goes to the optimal congestion window. And we propose the method called adaptive LRED based on asymptotic analysis and control.