Incremental spare capacity allocation for optical networks restoration
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Date
2015Author
Gonzalez-Montoro, Nehuen
Finochietto, Jorge M.
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Survivability of optical networks is
one of the most relevant planning problems due to
its impact on actual deployment cost. Indeed, survivability can only be achieved by deploying spare resources that will only be used under failure scenarios.
In particular, the case of dual link failures on fiber optic cables (i.e., fiber cuts) has recently received much
attention as repairing these cables typically takes too
much time, which increases the probability of a second fiber cut. In this paper, we consider dual link
failure scenarios and analyse the spare capacity allocation problem for restoration schemes, which have
the potential to achieve better survivability performance than protection schemes in non-triconnected
networks. However, since the traditional global optimization approach is not practical for large networks, we propose an incremental optimization approach that can find sub-optimal solutions in practical
times even in large networks.