Active Queue Management of TCP Flows with Self-scheduled Linear Parameter Varying Controllers
Keywords:AQM, congestion control, control theory, fluid model, LPV systems, selfscheduled controller
Control-theoretic approaches to Active Queue Management (AQM) are typically basedÂ on linearizations of fluid flow models around design conditions. These conditions depend onÂ the Round Trip Time (RTT), and the AQM performance is known to degrade if RTT valuesÂ during actual operation depart substantially from design values. To overcome this difficultyÂ a self-scheduled LPV controller for AQM is considered in this paper, where the controller isÂ modified in real-time based on RTT. Simulations show that the self-scheduled LPV controllerÂ has good performance for both constant and time-varying RTTs, and outperforms two otherÂ common control-theoretic approaches to AQM.
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