NDLI: TCP throughput and timeout - steady state and time-varying dynamics

Content Provider	IEEE Xplore Digital Library
Author	Bohacek, S. Shah, K.
Copyright Year	2004
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Delaware Univ., Newark, DE, USA (Bohacek, S.)
Abstract	While many models of TCP's dynamics have been developed, few focus on the effects of timeout and high loss probability. Active queue management (AQM) is an important application of these dynamic models. However, recent work has shown that AQM provides little performance benefit over drop-tail queueing for HTTP traffic, except, possibly, at high utilizations. It is at these utilizations that the dynamic models of TCP are the least accurate. The paper presents a dynamic model of TCP that accurately models timeout. This model is also applicable to the static case. The paper also presents a model of the variance and the distribution of the congestion window. It is shown that, while the dynamics of the mean value of the congestion window are rather mild, the dynamics of timeout display large oscillations that take several seconds to decay. These oscillations cause the average bit-rate also to oscillate wildly. The paper includes results from several million simulations providing a detailed view of the dynamics of timeout.
Starting Page	1334
Ending Page	1340
File Size	2560081
Page Count	7
File Format	PDF
ISBN	0780387945
DOI	10.1109/GLOCOM.2004.1378203
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-11-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Throughput Steady-state Application software Traffic control Displays Predictive models Transport protocols Stability Tail
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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