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Facing the multicore-challenge
Facing the multicore-challenge
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TR#: 00-42 TR title: On designing improved controllers for AQM routers supporting TCP flows Authors : C.V Hollot, V. Misra, D. Towsley, W. Gong Address Computer Science Department 140 Governor''s Drive University of Massachusetts Amherst, MA 01003-4601 Date: 7/10/00 On designing improved controllers for AQM routers supporting TCP flows In this report we study a previously developed linearized model of TCP and AQM. We use classical control system techniques to develop controllers well suited for the application. The controllers are shown to have better theoretical properties than the well known RED controller. We present guidelines for designing stable controllers subject to network parameters like load level, propogation delay etc. We also present simple implementation techniques which require a minimal change to RED implementations. The performance of the controllers are verified and compared with RED using \texttt{ns} simulations. The second of our designs, the Proportional Integral (PI) controller is shown to outperform RED significantly.