Technical Communique: Stability of a rate control system with averaged feedback and network delay

Authors:
Richard J. La;Priya Ranjan
Affiliations:
University of Maryland, College Park, MD, USA;University of Maryland, College Park, MD, USA
Venue:
Automatica (Journal of IFAC)
Year:
2006

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Abstract

We study the stability of a variant of Kelly's rate control scheme in a simple setting with a single flow and a single resource. The feedback signal from the resource is a function of an average rate of the flow obtained using a low pass filter. We derive a sufficient condition for asymptotic stability in the presence of an arbitrary fixed communication delay from the resource to the sender. We show that a sufficient condition derived earlier for a system without averaging suffices.