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A Square Root Formula for the Rate of Non-Persistent TCP Flows

François Baccelli 1 David R. Mcdonald
1 TREC - Theory of networks and communications
DI-ENS - Département d'informatique - ENS Paris, Inria Paris-Rocquencourt
Abstract : In this paper, we derive a closed form formula for the average rate attained by a non persistent TCP source which alternates between idle periods and download periods subject to a fixed packet loss probability. We also derive closed form expressions for the mean time to transfer a file and for the distribution of the transmission rate. Several distributions for the file sizes and idle times are considered including heavy tailed distributions. The formula for the mean transmission rate is shown to boil down to the classical square root mean value formula for persistent flows when the average file size tends to infinity. Using fixed point methods, these formulae can be applied to predict bandwidth sharing among competing HTTP flows subject to Active Queue Management.
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Submitted on : Friday, May 19, 2006 - 9:14:42 PM
Last modification on : Thursday, March 17, 2022 - 10:08:32 AM
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  • HAL Id : inria-00070699, version 1



François Baccelli, David R. Mcdonald. A Square Root Formula for the Rate of Non-Persistent TCP Flows. [Research Report] RR-5301, INRIA. 2004, pp.27. ⟨inria-00070699⟩



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