Cost of AQM in stabilizing TCP

Kim, Ki Baek and Low, Steven H. (2002) Cost of AQM in stabilizing TCP. Technical Report. California Institute of Technology. [CaltechCSTR:2002.008]

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Abstract

In this paper, we propose a unified mathematical framework based on receding horizon control for analyzing and designing AQM (Active Queue Management) algorithms in stabilizing TCP (Transfer Control Protocol). The proposed framework is based on a dynamical system of the given TCP and a linear quadratic cost on transients in queue length and flow rates. We derive the optimal receding horizon AQMs (RHAs) that stabilizes the linearized dynamical system with the minimum cost. Conversely, we show that any AQM with an appropriate structure solves the same optimal control problem with appropriate weighting matrix. We interpret existing AQM's such as RED, REM, PI and AVQ as different approximations of the optimal AQM, and discuss the impact of these approximations on performance.

EPrint Type:	Monograph (Technical Report)
Additional Information:	[Alternate URL: http://cisl.snu.ac.kr/~kkb] The first author acknowledges the support of the Post-doctoral Fellowship Program of Korean Science & Engineering Foundation (KOSEF).
Uncontrolled Keywords:	Congestion Control, Internet, Optimal Control, Receding Horizon Control
Subjects:	All Records
ID Code:	339
Deposited By:	Ki Baek Kim
Deposited On:	17 July 2002
Record Number:	CaltechCSTR:2002.008
Official Persistent URL:	http://resolver.caltech.edu/CaltechCSTR:2002.008
Usage Policy:	You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.

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