Collision-aware Reconfiguration Resource Based on Spectrum Efficiency First for Anycast Routing in Elastic Optical Networks
LIU Huanlin① XIONG Cuilian① CHEN Yong②
①(Key Laboratory of Optical Communications and Networks, Chongqing University of Posts and Telecommunications, Chongqing 400065, China) ②(School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China)
In the data-center interconnected Elastic Optical Network (EON), for reducing blocking probability and energy consumption of anycast request, a Collision-aware based on Spectrum Efficiency First Reconfiguration (CSEFR) strategy is proposed. The light-paths optimized by blocking probability are firstly calculated and allocated spectrum with the First-Fit (FF) mode. And the light-paths are sorted ascend by the light-paths’ spectrum efficiency. If the destination of light-path is a non-renewable energy supply data-center, the light-path is reserved. Then, an energy-saving light-path with suboptimal spectrum efficiency is established to connect a renewable energy supply data-center and allocated spectrum with the Last-Fit (LF) mode. But if the destination of light-path optimized by blocking probability is a renewable energy supply data-center which conflicts with other anycasts’ energy-saving light-paths, those conflicted energy-saving light-paths are reconfigured to their reserved light-paths optimized by blocking probability. The simulations results show that the proposed CSFER strategy can achieve a better tradeoff routing strategy between the blocking probability and energy consumption, and the CSFER strategy is universal for optical networks configured with different data centers.
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