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Eighth IEEE Symposium on Computers and Communications
Design a PID Controller for Active Queue Management
Kemer-Antalya, Turkey
June 30-July 03
ISBN: 0-7695-1961-X
Fan Yanfei, Tsinghua University
Ren Fengyuan, Tsinghua University
Lin Chuang, Tsinghua University
As an enhancement mechanism for the end-to-end congestion control, Active Queue Management (AQM) can keep smaller queuing delay and higher throughput by purposefully dropping the packets at the intermediate nodes. Comparing with RED algorithm, although the PI (Proportional-Integral) controller for AQM designed by C.Hollot improves the stability, the transient performance of the PI controller is not perfect, such as the regulating time is too long. In order to overcome this drawback, in this paper, the PID (Proportional-Integral-Differential) controller is proposed to speed up the responsiveness of AQM system. The controller parameters are tuned based on the determined gain and phase margins. The simulation results show that the integrated performance of the PID controller is obviously superior to that of the PI controller.
Index Terms:
AQM, PID controller, Delay, Stability margin
Citation:
Fan Yanfei, Ren Fengyuan, Lin Chuang, "Design a PID Controller for Active Queue Management," iscc, pp.985, Eighth IEEE Symposium on Computers and Communications, 2003
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