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Cost optimal optical ring design with ring-interworking constraints

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2 Author(s)
Raskina, O. ; IEOR Dept, Columbia Univ., New York, NY, USA ; Nagarajan, R.

In our work we consider the cost optimal optical ring design problem. Given a set of wavelength demands between nodes which are arranged in a fiber ring topology, the problem is one of designing multiple optical rings stacked on the topology to carry the nodal demands with three different ring-interworking constraints. This design is to be carried out in a manner to minimize the overall equipment cost which includes two major components: a nodal optical ring switch cost and a fixed per ring cost. The ring-interworking schemes dealt with in this work are single-node ring interworking (SRI), basic dual-node ring interworking (DRI) and DRI with protection access. We have proposed an LP column generation based heuristic and a cost lower bound for each of the three constrained design cases. In numerical studies, the heuristic was observed to produce designs within 10 - 15% of the cost lower bound in the worst cases and within 1% on average.

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Communications, 2002. ICC 2002. IEEE International Conference on  (Volume:5 )

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