The survivable spectrum-shared ability problems are addressed by considering the shared-path protection in flexible bandwidth optical networks with distributed data centers. The overall objective of this paper is to investigate the effect of the spectrum-shared ability on the spectrum efficiency and the blocking probability of cloud service requests. We propose a survivable algorithm with the spectrum-shared ability (SA_SSA) to minimize blocking probability of cloud service requests and to improve the spectrum efficiency in shared-path protection. For comparison, an existing shared-path protection algorithm named Aggressive algorithm with spectrum-shared ability is also introduced. Simulation results show that, considering the different spectrum-shared abilities, our proposed SA_SSA has a better performance in terms of blocking probability, number of frequency slots/Erlang, spectrum occupation ratio, and spectrum redundancy ratio compared to Aggressive algorithm in flexible bandwidth optical networks with distributed data centers. Meanwhile, the spectrum efficiencies of the SA_SSA and Aggressive algorithms improve as the spectrum-shared abilities are strengthened.
Photonic Network Communications – Springer Journals
Published: Jun 7, 2016
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