A cross-layer ILP formulation for finding p-cycles in all-optical networks

Authors:
Amir Askarian;Suresh Subramaniam;Maïté Brandt-Pearce
Affiliations:
The George Washington University, Washington, DC;The George Washington University, Washington, DC;University of Virginia, Charlottesville, Virginia
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

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Abstract

Their high recovery speed and efficiency have made p-Cycles a premier approach to link protection. Recent research has discussed their capabilities and provided different methods for p-Cycle selection in communication networks. In this work, we consider the p-Cycle approach to resilient all-optical network design and present an ILP formulation that preconfigures p-Cycles in such an environment. Our proposed formulation strives to find p-Cycles that have good recovery capability in the face of physical layer impairments (PLIs) and are capacity-efficient at the same time. Our numerical results show a trade-off between these two performance measures. We evaluate the performances of different outcomes of the formulation using our accurate physical layer model. We show that applying our previously proposed cross-layer RWA algorithm, HQ, greatly improves the performance.