Improving FAST TCP Performance in Asymmetric Networks

Authors:
Fei Ge;Liansheng Tan
Affiliations:
Central China Normal University, China;The Australian National University, Australia
Venue:
AUSWIRELESS '07 Proceedings of the The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications
Year:
2007

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Performance effects of two-way FAST TCP

Computer Networks: The International Journal of Computer and Telecommunications Networking

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Abstract

FAST TCP is a new promising TCP protocol developed for high-speed long-latency networks. This paper reveals that, within the FAST TCP protocol, the forward flow suffers performance degradation in asymmetric networks with bi-directional flows. We disclose the reason for the performance degradation, i.e., the queue delay measured by forward flow in one-way path is severely influenced by backward flow. A novel method is proposed to ameliorate this situation by using TCP time stamp option. Simulation results demonstrate significant performance improvement of forward flow.