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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