Design a PID Controller for Active Queue Management

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ISCC '03 Proceedings of the Eighth IEEE International Symposium on Computers and Communications
Year:
2003

Citing 0
Cited 6

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Computers and Electrical Engineering

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Abstract

As an enhancement mechanism for the end-to-endcongestion control, Active Queue Management (AQM) cankeep smaller queuing delay and higher throughput bypurposefully dropping the packets at the intermediatenodes.Comparing with RED algorithm, although the PI(Proportional-Integral) controller for AQM designed byC.Hollot improves the stability, the transient performanceof the PI controller is not perfect, such as the regulatingtime is too long.In order to overcome this drawback, inthis paper, the PID (Proportional-Integral-Differential)controller is proposed to speed up the responsiveness ofAQM system.The controller parameters are tuned basedon the determined gain and phase margins.The simulationresults show that the integrated performance of the PIDcontroller is obviously superior to that of the PI controller.