Abstract
These years, data centers are developing quickly and cloud Optical and Data Center Network (ODCN) has been shown to be the most viable solution for inter-data-center network implementation with less energy consumption and higher transmit rate. At the same time, elastic optical networks and waveband switching can address the problems caused by dramatic increase in network scale. In cloud hierarchical ODCN with flexible spectrum and waveband switching, survivability is an important and complex issue which is needed to be researched. So, we study the survivable routing, spectrum and waveband assignment strategy in cloud hierarchical ODCN, and in this paper, a novel hierarchical shared-protection (HSP) strategy is proposed. We consider spectrum fragmentation, waveband and shared-protection simultaneously. By quantifying the influence of spectrum assignment and the emergence of fragmentation, slots are assigned to the optimal paths. In order to share protection resource or wavebands, a heuristics algorithm named HSPGA is proposed for optimally picking out the two protection paths. Simulation results show that the proposed HSP strategy decreased the amount of employed ports significantly. In addition, the spectrum efficiency is improved.
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Acknowledgments
This work is supported in part by the National Nature Science Foundation of China (NSFC) (Nos. 61205058 and 61331008), the Hi-Tech Research and Development Program of China (863 Program) (No. 2012AA011302), the Program for New Century Excellent Talents in University (NCET-12- 0793), the Beijing Nova Program (No. 2011065), and the China Post Doctoral Science Foundation (No. 2015M570979).
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Yin, S., Huang, S., Zhou, Y. et al. Survivable routing, spectrum and waveband assignment strategy in cloud Optical and Data Center Network. Photon Netw Commun 31, 532–542 (2016). https://doi.org/10.1007/s11107-015-0560-9
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DOI: https://doi.org/10.1007/s11107-015-0560-9