A traffic control algorithm for Clos network type ATM switches

Choi S-H and Kim Y-D ()
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Choi S-H: Korea Advanced Institute of Science and Technology
Kim Y-D: Korea Advanced Institute of Science and Technology

Journal of the Operational Research Society, 2002, vol. 53, issue 7, 783-791

Abstract: Abstract This paper presents a new traffic control algorithm for asynchronous transfer mode (ATM) switches composed of Clos network type switch fabric. In most traffic control algorithms previously proposed, an ATM switch has been considered as a single node, although the switch fabric of an ATM switch is usually of a network type. In this paper, we suggest a new control algorithm that is designed not only for the ATM network but also for the switch fabric and that can maintain high speed even in cases where buffer capacity of the switch fabric is limited. Main modules of the suggested algorithm are a traffic status detection mechanism based on non-parametric statistical tests, a cell-loss detection mechanism, and a cluster-based fair share computation procedure. Results of simulation experiments show that the suggested algorithm satisfactorily adjusts traffic rate of available bit rate services according to changes in traffic rate used by quality of service (QoS) guaranteed services. The results also show that the algorithm prevents cell losses relatively well and keeps the delay time of QoS guaranteed services short enough.

Keywords: ATM switch; traffic control; available bit rate services (search for similar items in EconPapers)
Date: 2002
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DOI: 10.1057/palgrave.jors.2601372

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