| Publisher | University of Warwick | ||
|---|---|---|---|
| Format | 316.0KB PDF | Date added | 01 Aug 2007 |
| Topics | Network Design | ||
| Downloads | 7 | ||
The paper studies a planning problem arising in SDH/WDM multi-layer telecommunication net-work design. The goal is to find a minimum cost installation of link and node hardware of both network layers such that traffic demands can be realized via grooming and a survivable routing. The paper presents a mixed-integer programming formulation that takes many practical side constraints into account, including node hardware, several bitrates, and survivability against single physical node or link failures. This model is solved using a branch-and-cut approach with problem-specific preprocessing and cutting planes based on either of the two layers. On several realistic two-layer planning scenarios, the paper shows that these cutting planes are still useful in the multi-layer context, helping to increase the dual bound and to reduce the optimality gaps.
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