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Provisioning of a pair of disjoint paths is very important in WDM network planning and management to provide fault tolerant services. However, known node-disjoint paths search methods do not efficiently work in networks with asymmetric nodes which have restrictions on the internal connection between outer links. In this paper, we present a novel(More)
Switched optical transport networks (OTNs) and OTN-level shared mesh restoration (SMR) are promising technologies for improving the efficiency of the current OTN/WDM networks. In this paper, we present the evaluation results of OTN-level SMR in WDM networks. We focus on equipment cost, capacity utilization, and the value of sharing factor N in 1 : N(More)
Shared protection/restoration is a promising solution for reducing protection resources and is supported at each layer of the current multi-layer networks. Software-defined networking is expected to reduce equipment cost as well as operational cost by orchestrating these shared protection functionalities. However, although protection resource sharing(More)
Provisioning of a pair of disjoint paths is crucial in WDM network planning and management in order to provide fault tolerant services. However, in networks with asymmetric nodes that have restrictions on the internal connections between outer links, existing methods for node-disjoint paths search have trap problems and require time consuming iterative(More)
Shared protection/restoration is a promising solution for reducing protection resources and is supported at each layer of the current multi-layer networks. Software-defined networking is expected to reduce equipment cost as well as operational cost by orchestrating these shared protection functionalities. However, although protection resource sharing(More)
Emerging applications require networks to provide dynamic and reconfigurable services in order to efficiently use network resources for cost reduction. In this paper, we propose a novel integer linear programming (ILP) based approach for network reconfiguration to compute optimized routes for connections, and also to strategically migrate connections to(More)
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