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25 October 2017 Holding-time-aware asymmetric spectrum allocation in virtual optical networks
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Proceedings Volume 10464, AOPC 2017: Fiber Optic Sensing and Optical Communications; 104641V (2017)
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China
Virtual optical networks (VONs) have been considered as a promising solution to support current high-capacity dynamic traffic and achieve rapid applications deployment. Since most of the network services (e.g., high-definition video service, cloud computing, distributed storage) in VONs are provisioned by dedicated data centers, needing different amount of bandwidth resources in both directions, the network traffic is mostly asymmetric. The common strategy, symmetric provisioning of traffic in optical networks, leads to a waste of spectrum resources in such traffic patterns. In this paper, we design a holding-time-aware asymmetric spectrum allocation module based on SDON architecture and an asymmetric spectrum allocation algorithm based on the module is proposed. For the purpose of reducing spectrum resources’ waste, the algorithm attempts to reallocate the idle unidirectional spectrum slots in VONs, which are generated due to the asymmetry of services’ bidirectional bandwidth. This part of resources can be exploited by other requests, such as short-time non-VON requests. We also introduce a two-dimensional asymmetric resource model for maintaining idle spectrum resources information of VON in spectrum and time domains. Moreover, a simulation is designed to evaluate the performance of the proposed algorithm, and results show that our proposed asymmetric spectrum allocation algorithm can improve the resource waste and reduce blocking probability.
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Chunjian Lyu, Hui Li, Yuze Liu, and Yuefeng Ji "Holding-time-aware asymmetric spectrum allocation in virtual optical networks", Proc. SPIE 10464, AOPC 2017: Fiber Optic Sensing and Optical Communications, 104641V (25 October 2017);

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