Resource efficiency improved approach for shared path protection in EONs

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• 作者：Huanlin Liu ; Ruiyan Li ; Yong Chen ; Xin Wang
• 关键词：EONs ; Shared path protection ; Spectrum allocation ; Minimal cost stable set ; Graph coloring algorithm
• 刊名：Photonic Network Communications
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：33
• 期：1
• 页码：19-25
• 全文大小：
• 刊物主题：Computer Communication Networks; Electrical Engineering; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1572-8188
• 卷排序：33

文摘

For improving the resource efficiency of dynamic shared path protection in elastic optical networks, a survivable RSA (SRSA)-based heuristic algorithm is proposed in the paper. In SRSA, an adaptive adjustment link cost function is devised to effectively select working and protection paths. The cost function sufficiently considers available spectrum resources and the length of light paths for both working and protection paths. In order to achieve high resource efficiency, a spectrum allocation strategy named minimal cost stable set is proposed to allocate spectrum for protection paths with respect to the resource efficiency in the link cost function. And the graph coloring algorithm is introduced to select the shared protection path with the highest resource efficiency for the request. Compared with the shared path protection and dynamic load balancing shared path protection, simulation results show that the proposed SRSA decreases bandwidth blocking probability and achieves high resource efficiency.