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- W2338308168 abstract "In this paper, protection strategies of WDM networks are viewed from a cost perspective. The goal is to minimize the network cost while ensuring the network survivability. In WDM networks, multi fibers are kept in a duct and that duct can be treated as a link SRLG (shared risk link group). With the increase in size and number of shared risk link groups, capacity efficiency of shared-path protection decreases due to SRLG-disjoint constraints. As a result, a full SRLG failure protection is no longer a practical protection scheme. In a network, there are always some links with higher degree of usage compared to other links in the network. In the event of failure of such links, the survivability of the network is severely affected and these links are called as critical links. The ducts that carry these critical links are designated as critical ducts. This paper proposes an approach in which partial critical duct -disjoint backup path is provided by choosing the backup path with least number of critical ducts to make the impact of duct failures as low as possible. A dual-duct infrastructure is presented for these critical ducts as a solution to reduce the resource requirement and to provide flexibility in selecting the backup paths. Simulation results show that this scheme offers better survivability against both single duct and double duct failures with overall reduction in network cost." @default.
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- W2338308168 date "2012-01-01" @default.
- W2338308168 modified "2023-09-23" @default.
- W2338308168 title "A Cost Effective Approach for WDM Network Protection under Critical Duct Constraints" @default.
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