A Novel Self-Tuning Feedback Controller for Active Queue Management Supporting TCP Flows

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Wireless access points act as bridges between wireless and wired networks. Since the actually available bandwidth in wireless networks is much smaller than that in wired networks, there is a bandwidth disparity in channel capacity which makes the access point a significant network congestion point. The recently proposed Active Queue Management (AQM) is an effective method used in wired network and wired-wireless network routers for congestion control, and to achieve a trade-off between channel utilization and delay. The de facto standard, the Random Early Detection (RED) AQM scheme, and most of its variants use average queue length as a congestion indicator to trigger packet dropping.