Abstract
Abstract The Distributed Queue Dual Bus (DQDB) protocol, which has been specified by the IEEE 802.6 as the Metropolitan Area Network (MAN) standard, has the performance limiting feature in which busy slots must continue to propagate downstream, even if they have already been read. We address the issue of slot reuse in DQDB. We introduce and evaluate the performance of a new erasure node algorithm. The algorithm effectively balances the slot reuse and request cancellation functions by buffering the request stream and only passing those requests that have not been satisfied by erased slots. We show that our algorithm possesses a number of desirable features which makes it superior to existing algorithms.
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