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Input and Output Queueing Two Stage ATM Switch with Hot-Spot Route
Shigeki SHIOKAWA Iwao SASASE
IEICE TRANSACTIONS on Communications
Publication Date: 1998/02/25
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on ATM Switching Systems for future B-ISDN)
Category: ATM switching architecture
ATM switch, backpressure mode, queue loss mode, hot-spot traffic, cell loss probability, system delay,
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Input and output queueing two stage ATM switch model which is effective under variable hot-spot traffic is proposed. In order to prevent the degradation of performance due to hot-spot traffic, the hot-spot route is added in which cells destined to the hot-spot port bypass. The switch applies the backpressure mode basically. When the switch judges that the hot-spot port exists, it routes cells destined there to the hot-spot route and applies the queue loss mode on them. We evaluate both the cell loss probability and the mean system delay under the nonuniform traffic with variable hot-spot port by computer simulation. As the results, it is shown that our proposed switch can achieve better switching performance than those of conventional switches under variable traffic condition.