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Emerging applications require future elastic optical networks to provide dynamic and reconfigurable services while maintaining efficient usage of wavelength resources. In this paper, we propose integer linear programming (ILP)-based wavelength defragmentation solutions with minimal optical path disruptions during the migration process. The new approaches achieve up to 20% resource efficiency improvement...
We propose wavelength defragmentation solutions with minimum optical path disruptions. The new approaches achieve up to 20% resource efficiency improvement with less than one fourth of disruptions compared to the conventional approach.
SDI (Software Defined Infrastructure) provides virtualized infrastructures to customers by slicing computing resources and network resources. One of the important problems for deploying SDI framework is to control the assignment of physical resources to a virtual network against changes of traffic demand and service demand. For this problem, VNE (Virtual Network Embedding) problem that maps a virtual...
We demonstrate novel re-optimization design techniques for realizing agile and seamless service migration with minimum connection disruptions. We also show the effectiveness of our integer linear programming based approach through network simulations.
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 improves link utilization, it sometimes increases...
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 their optimized routes, with the objective of...
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