12.Adaptive REDにおける最大パケット廃棄率更新時間間隔の動的制御法

概要

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DiffServ (Differentiated Services) guarantees QoS in the Internet. Adaptive RED is one of the promising technologies of DiffServ. Adaptive RED only sets average queue size to "Target". It updates Maximum Packet Drop Rate (max_p) with the prescribed interval and tries to keep the average queue size equal to Target. The qualities of the real time services such as voice and video have been improved since the queuing delay variations were set to be small. However, how to prescribe the interval is to be studied. In this paper, we point out a problem of Adaptive RED that average queue size (avg) does not converge to Target under certain parameter and network traffic conditions. And we proposed a new Adaptive RED scheme with dynamically controlled update interval of the max_p. The performances are evaluated by simulations. We confirm that the proposed scheme shows the convergence of avg to Target under such conditions where a conventional Adaptive RED shows the oscillation of avg.
工学院大学の論文
2006-04-30