- TITLE: Fixed and Adaptive
Model-Based Controllers for Active Queue Management
- AUTHORS: Yossi Chait, C.V. Hollot, Vishal Misra, Salomon Oldak, Don
Towsley and Wei-Bo Gong
- ABSTRACT: In this paper we present new model-based controllers for
active queue management (AQM) supporting TCP flows. Our control design
is based on linearization of a previously developed TCP model using
fluid flow and stochastic differential equations. An AQM using a simple
PI controller is shown to significantly outperform RED AQM. However,
we show that both AQMs are unable to maintain performance as the number
of flows increases. To overcome this, we introduce a special type of
adaptation, the externally excited adaptive loop (EEAL) controller.
In comparison to the PI AQM, the EEAL AQM exhibits faster response to
flow changes, and is able to give a dynamic estimate of the number of
flows.
- STATUS: To be presented at ACC 2001.
- DATE OF ENTRY:March 9,2001.
- full paper (.pdf,
565 KB)
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