Networking Investigate

Practical Rate-Based Congestion Control for Wireless Mesh Networks

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Executive Summary

This paper introduces an adaptive pacing scheme to overcome the drawbacks of TCP in wireless mesh networks with Internet connectivity. The pacing scheme is implemented at the wireless TCP sender as well as at the mesh gateway, and reacts according to the direction of TCP flows running across the wireless network and the Internet. TCP packets are transmitted rate-based within the TCP congestion window according to the current out-of-interference delay and the coefficient of variation of recently measured round-trip times. Opposed to the majority of previous work which builds on simulations, the paper implementx a Linux prototype of the approach and evaluate its feasibility in a real 20-node mesh testbed.

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