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Optica Publishing Group
  • Journal of Optical Networking
  • Vol. 3,
  • Issue 3,
  • pp. 152-168
  • (2004)

Efficient capacity sharing for path protection in meshed optical networks

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Abstract

Feature Issue on Next-Generation WDM Network Design and Routing (WDMN). Efficient resource management in meshed optical networks is critical for supporting differentiated services, such as network restoration, in a cost-competitive manner. We propose and study several alternatives for dynamic and distributed selection of primary and protection paths. The focus is on algorithms where the bandwidth can be shared efficiently among protection paths, although other alternatives are considered as well. The routing algorithm and link cost function are based on a Markov decision-process framework. In particular, we use this framework to justify the link cost structure for primary and shared bandwidth. We also propose and study several options for describing the link state, which in turn determines the link cost, with the objective of minimizing the amount of data to be advertised without sacrificing performance. The proposed solutions can be implemented without changing the existing set of protocols. The numerical results show performance and cost savings for the different algorithm options.

© 2003 Optical Society of America

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