Naslov
Observations on Equation-Based Rate Control

Autori
Vojnovic, Milan ; Le Boudec, Jean-Yves

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni

Skup
IPAM Workshop on Large-Scale Communication Networks: Topology, Routing, Traffic, and Control (invited speaker) ; Organizers: J. Doyle, F. P. Kelly, S. Low, W. Willinger

Mjesto i datum
Los Angeles (CA), Sjedinjene Američke Države, 03.2002

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
Internet; Congestion Control; Equation-Based Rate Control; TCP-friendliness

Sažetak
We consider unicast equation based rate control defined as follows. A source adjusts its rate primarily at loss events to f(p) where p is an estimator of loss event ratio. Function f is typically the loss-throughput formula of a TCP source. In absence of loss events, the send rate can be also increased by an additional mechanism. We suppose the estimator is unbiased estimator of the loss event interval (amount of data sent between two consecutive loss events). Indeed, for the loss event intervals fixed to some value, the throughput x satisfies x=f(p). However, if loss process is random, it is not clear how the throughput would relate to f(p). If x<=f(p), we say the control is conservative. We derive a representation of the throughput, and obtain that conservativeness is primarily due to various convexity properties of function f, and variability and correlation structure of the loss process. In many cases, these factors drive the control to be conservative, but we also show some reasonable cases of non-conservative control. However, having observed that our source should experience larger long-run loss event ratio than TCP would, non TCP-friendliness becomes less likely. In our study we do not consider the effects involved due to randomness of the round-trip time.

Izvorni jezik
Engleski

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