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Improvements in DCCP congestion control for satellite links

Sarwar, Golam and Boreli, Roksana and Jourjon, Guillaume and Lochin, Emmanuel Improvements in DCCP congestion control for satellite links. (2008) In: International Workshop on Satellite and Space Communications 2008 - IWSSC’08, 01-03 Oct 2008, Toulouse, France .

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Official URL: http://dx.doi.org//10.1109/IWSSC.2008.4656732

Abstract

We propose modifications in the TCP-Friendly Rate Control (TFRC) congestion control mechanism from the Datagram Congestion Control Protocol (DCCP) intended for use with real-time traffic, which are aimed at improving its performance for long delay (primarily satellite) links. Firstly, we propose an algorithm to optimise the number of feedback messages per round trip time (RTT) rather than use the currently standard of at least one per RTT, based on the observed link delay. We analyse the improvements achievable with proposed modification in different phases of congestion control and present results from simulations with modified ns-2 DCCP and live experiments using the modified DCCP Linux kernel implementation. We demonstrate that the changes results in improved slow start performance and a reduced data loss compared to standard DCCP, while the introduced overhead remains acceptable.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Other partners > Australian National University - ANU (AUSTRALIA)
French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE
Other partners > University of New South Wales - UNSW (AUSTRALIA)
Laboratory name:
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Deposited By: Emmanuel Lochin
Deposited On:18 Mar 2009 15:05

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