Abstract
The topological reconfiguration of an asynchronous transfer mode (ATM) network embedded into a backbone facility network that uses digital cross connect systems (DCSs) is addressed. The ATM topology consists of links (express pipes) obtained from the backbone facility via circuit switching through DCSs. The problem is formulated as a network optimization problem where performance is optimized, subject to capacity constraints posed by the underlying facility trunks. The variables in this problem are the selection of the express pipes, the routing of traffic on such pipes, and the allocation of bandwidth to pipes. Dynamic reconfiguration schemes where the embedded topology is periodically adjusted to track the fluctuations in traffic requirements are discussed. Such reconfigurations are shown to reduce congestion substantially. >
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