Novel P-Cycle Selection Algorithms for Elastic Optical Networks
Novel P-Cycle Selection Algorithms for Elastic Optical Networks
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DOI：
10.1007/978-3-030-38085-4_14
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发表时间：
2019-05
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影响因子：
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通讯作者：
Rujia Zou;S. Subramaniam
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文献类型：
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作者：
Rujia Zou;S. Subramaniam
弹性光网络（EON）由于资源分配的灵活性而有望提供高的频谱利用效率。生存能力被认为是EONs的一个重要方面。P-cycle保护具有恢复速度快、保护效率高等优点，在EON中具有很大的应用前景。传统的固定网格WDM网络中的P-环已经得到了广泛的研究，然而，EON中的P-环的设计和选择却很少受到关注。在本文中，我们考虑的设计和选择的p-周期的EONs与距离相关的调制。我们提出了两种新的基于链接的p-圈评价方法：个人p-圈选择和p-圈集选择的EON。在此基础上，提出了两种P-圈设计算法，即业务无关P-圈选择（TIPS）和面向业务的P-圈选择（TOPS），以寻找最佳的P-圈集合，使其能够对单链路故障提供100%的故障相关保护。我们使用静态和动态流量模型来评估我们的算法。仿真结果表明，所提出的算法具有更好的性能比常用的基线算法。
Elastic optical networks (EONs) promise to provide high spectrum utilization efficiency due to flexibility in resource allocation. Survivability is regarded as an important aspect of EONs. P-cycle protection is very attractive for EONs due to fast restoration and high protection efficiency. P-cycles have been extensively studied for conventional fixed-grid WDM networks; however, p-cycle design and selection for EONs has received much less attention. In this paper, we consider the design and selection of p-cycles for EONs with distance-dependent modulation. We propose two novel link-based p-cycle evaluation methods: individual p-cycle selection and p-cycle set selection for EONs. Based on these methods, two p-cycle design algorithms, namely, Traffic Independent P-cycle Selection (TIPS) and Traffic-Oriented P-cycle Selection (TOPS), are proposed to find the best set of p-cycles that is able to provide 100% failure-dependent protection against single link failures. We evaluate our algorithms using both static and dynamic traffic models. Simulation results indicate that the proposed algorithms have better performance than commonly used baseline algorithms.