A high-speed integrated services ATM/STM switch☆

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Abstract

A new, high-speed switch architecture which uses Asynchronous Transfer Mode (ATM) and Synchronous Transfer Moder (STM) to support integrated voice-data-video, multicasting, and virtual networking services is described. The switch employs autonomous processing units with local memory to store switching information and is built around a modified Banyan network with bit-parallel lines linking its node processors. The system is synchronous and time is slotted with slots organized into frames. Fixed-rate video and other real-time periodic traffic are handled via STM switching, while voice, data, datagrams, and other bursty traffic are ATM switched. Multicasting is realized by allocating dedicated STM bandwidth to real-time periodic sources and virtual ATM bandwidth to bursty sources. Virtual networking is achieved by putting an STM subnetwork into place over which authorized users communicate via ATM and/or STM. Analytic models to determine the switch's performance characteristics are developed and illustrated via examples. The results show that the switch has excellent delay vs. throughput performance for ATM traffic in the presence of STM traffic, and very low blocking-and-loss probability for STM circuit set-up requests in the presence of other traffic.

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    • Cited by (1)

    ☆

    This work was done when X. Jiang was associated with the University of Washington.

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    Copyright © 1993 Published by Elsevier B.V.