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An Improved Link Model for Window Flow Control and Its Application to FAST TCP
California Institute of Technology.
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2009 (English)In: IEEE Transactions on Automatic Control, ISSN 0018-9286, E-ISSN 1558-2523, Vol. 54, no 3, 551-564 p.Article in journal (Refereed) Published
Abstract [en]

This paper presents a link model which captures the queue dynamics In response to a change in a transmission control protocol (TCP) source's congestion window. By considering both self-clocking and the link integrator effect, the model generalizes existing models and is shown to be more accurate by both open loop and closed loop packet level simulations. It reduces to the known static link model when flows' round trip delays are identical, and approximates the standard integrator link model when there is significant cross traffic. We apply this model to the stability analysis of fast active queue management scalable TCP (FAST TCP) Including its filter dynamics. Under this model, the FAST control law is linearly stable for a single bottleneck link with an arbitrary distribution of round trip delays. This result resolves the notable discrepancy between empirical observations and previous theoretical predictions. The analysis highlights the critical role of self-clocking in TCP stability, and the proof technique is new and less conservative than existing ones.

Place, publisher, year, edition, pages
2009. Vol. 54, no 3, 551-564 p.
Keyword [en]
Acknowledgments (ACKs), fast active queue management scalable, transmission control protocol (FAST TCP), congestion control, communication-networks, stability, internet, performance, algorithms, fairness, systems, delays
National Category
Communication Systems Control Engineering
Research subject
URN: urn:nbn:se:kth:diva-18264DOI: 10.1109/tac.2009.2012986ISI: 000264397200011ScopusID: 2-s2.0-63449139229OAI: diva2:336310
Swedish Research Council, 621-2004-4695
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2012-01-18Bibliographically approved

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Jacobsson, KristerHjalmarsson, Håkan
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Automatic ControlACCESS Linnaeus Centre
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