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Improving TCP Performance over Optimal CSMA in Wireless Multi-Hop Networks

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4 Author(s)
Jinsung Lee ; Dept. of Electr. Eng., KAIST, Daejeon, South Korea ; Hyang-Won Lee ; Yung Yi ; Song Chong

Optimal CSMA (oCSMA) has been receiving extensive attentions for its provable optimality in throughput and fairness without message passing over wireless multi-hop networks. However, recent studies suggest that TCP over oCSMA performs poorly, hindering the deployment of oCSMA in real networks. In this letter, we show that just a simple, additional virtual queue at the MAC layer can significantly improve TCP performance when oCSMA is used as the underlying MAC. Through testbed-based experiments, we demonstrate that with our virtual queueing scheme, TCP flows achieve near-optimal throughput performance in various scenarios.

Published in:

Communications Letters, IEEE  (Volume:16 ,  Issue: 9 )

Date of Publication:

September 2012

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