Planning of Transport Networks based on Photonic and Electronic Cross-Connection

Planning of Transport Networks based on Photonic and Electronic Cross-Connection This paper deals with the problem of dynamic allocation of bandwidth in a hierarchical transport platform comprised of both broadband (optical) and wideband (ATM) crossconnects. The crossconnect platforms will react to fluctuations of traffic on different time scales. The model developed in this paper will take advantage of both multi-service and multi-hour character of traffic profiles and includes off-line and on-line algorithms. The off-line model will generate the configuration of optical bearers and the routing of origin-destination paths in the network for each time interval. The on-line algorithms will adjust the capacity allocated to each path in accordance with the short-term fluctuations of demand to decrease blocking probability and maximize resource utilization. We formulate the problem of designing a minimum cost network for a multi-hour, multi-service traffic profile where the cost is a piecewise linear function of the maximum possible number of optical paths as well as a linear function of the number of ports and of the traffic flow through tandem nodes. The model is a large-scale mixed integer program. Further, we provide a second model to carry out the fine tuning necessary to cater for traffic fluctuations. The alternative versions of the second model are given, including a goal program that optimally matches the network capacity to the varying traffic requirements. Photonic Network Communications Springer Journals

Planning of Transport Networks based on Photonic and Electronic Cross-Connection

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Kluwer Academic Publishers
Copyright © 2000 by Kluwer Academic Publishers
Computer Science; Computer Communication Networks; Electrical Engineering; Characterization and Evaluation of Materials
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