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A practical approach for statistical matching of output queueing

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2 Author(s)
Hyoung-Il Lee ; Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ. Seoul, South Korea ; Seung-Woo Seo

We study a practical approach to match the performance of an output-queued switch statistically. For this purpose, we propose a novel switching architecture called a multiple input/output-queued (MIOQ) switch that requires no speedup for providing sufficient switching bandwidth. To operate an MIOQ switch in a practical manner, we also propose a multitoken-based arbiter which schedules the switch at a high operation rate and a virtual first-in first-out queueing scheme which guarantees the departure order of cells belonging to the same traffic flow at output. Additionally, we show that the proposed switch can naturally provide asymmetric bandwidth for inputs and outputs, which may be important in dealing with the links with different bandwidth demands. Finally, we compare the performance of an MIOQ switch with that of an output-queued switch and discuss the design criteria to match the performance of an output-queued switch.

Published in:

IEEE Journal on Selected Areas in Communications  (Volume:21 ,  Issue: 4 )