Adaptive Modulation and Regeneration-Aware Routing and Spectrum Assignment in SBPP-Based Elastic Optical Networks
Adaptive Modulation and Regeneration-Aware Routing and Spectrum Assignment in SBPP-Based Elastic Optical Networks
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DOI：
10.1109/jphot.2017.2685418
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发表时间：
2017-03
影响因子：
2.4
通讯作者：
Hong Guo;Yongcheng Li;Longfei Li;G. Shen
中科院分区：
文献类型：
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作者：
Hong Guo;Yongcheng Li;Longfei Li;G. Shen
研究了基于共享备份路径保护的弹性光网络中再生器共享、自适应调制、路由和频谱分配问题。提出了三种再生器放置策略和如何有效地使用/共享放置的再生器的机制。一个有效的启发式算法也被开发的RMRS问题，以最大限度地保护光路之间的再生器和频谱共享的调制格式和频谱转换能力的联合考虑每个遍历再生器沿着光路。基于带宽阻塞概率（BBP）方面的性能研究，我们发现，所提出的策略和启发式算法是有效的信号再生器利用率显着降低BBP。研究还发现，除了信号再生之外，每个再生器提供的调制格式转换和频谱转换的能力有助于降低BBP，并且正如预期的那样，频谱转换的能力比调制格式转换对性能改善起着更重要的作用。最后，还有趣地发现，在BBP性能的改善和再生器数量的增加之间存在饱和趋势。稀疏地放置在网络中的有限数量的信号再生器足以实现良好的BBP性能。
We focus on the Regenerator sharing, adaptive Modulation, Routing, and Spectrum assignment (RMRS) problem in a shared backup path protection based elastic optical network. Three regenerator placement strategies and the mechanisms of how to efficiently use/share the placed regenerators are proposed. An efficient heuristic algorithm is also developed for the RMRS problem to maximize regenerator and spectrum sharing among protection lightpaths with the joint consideration of modulation format and spectrum conversion capabilities of each traversed regenerator along a lightpath. Based on the performance study in terms of bandwidth blocking probability (BBP), we find that the proposed strategies and heuristic algorithm are efficient in signal regenerator utilization to significantly reduce BBP. It is also found that in addition to signal regeneration, the capabilities of modulation format conversion and spectrum conversion provided by each regenerator are helpful in reducing BBP, and as expected, the capability of spectrum conversion plays a more important role than the modulation format conversion for performance improvement. Finally, it is also interesting to find that there exists a saturation trend between the improvement of BBP performance and the increase in the number of regenerators. A limited number of signal regenerators sparsely placed in a network is sufficient to achieve a good BBP performance.