最小故障风险损失的弹性光网络多链路故障概率保护策略

发布时间：2018-11-05 17:46

【摘要】：针对弹性光网络中多链路故障100%保护的资源消耗冗余度较高的问题,该文提出一种最小故障风险损失的概率保护(MFRL-PP)策略,在多链路故障时为业务提供高效率的概率保护。在MFRL-PP策略中,该文设计了一个综合考虑链路负载和故障风险的代价函数,为业务选择故障风险小且频谱资源消耗少的概率保护光路。当最小故障风险路径无法传输时,为进一步降低概率保护光路的故障风险损失,该文还设计了一种非对称业务流分流的最小故障风险损失概率保护机制,以便选择故障风险损失最小的分流路径组作为传输光路。同时,在传输光路的频谱分配阶段,提出了基于最大频谱重合度的可用频谱块选择策略,以减少频谱碎片的产生。仿真结果表明所提策略不仅有效地提升了频谱利用率,还较好地实现了带宽阻塞率与故障风险的平衡。
[Abstract]:In order to solve the problem of high resource consumption redundancy of 100% multilink fault protection in elastic optical networks, this paper proposes a probability protection (MFRL-PP) strategy for minimum fault risk loss. Provides efficient probabilistic protection for services in the event of multiple link failures. In the MFRL-PP strategy, a cost function considering link load and fault risk is designed to select a probabilistic protection optical path for traffic with less fault risk and less spectrum resource consumption. When the minimum fault risk path cannot be transmitted, in order to further reduce the fault risk loss of the optical path of probabilistic protection, this paper also designs a probability protection mechanism of minimum fault risk loss for asymmetric traffic diversion. In order to select the shunt path group with the least fault risk loss as the transmission optical path. At the same time, in the phase of spectrum allocation of transmission optical path, the available spectrum block selection strategy based on the maximum spectrum coincidence degree is proposed to reduce the generation of spectrum fragments. The simulation results show that the proposed strategy not only effectively improves the spectral efficiency, but also achieves a good balance between the bandwidth blocking rate and the fault risk.
【作者单位】：重庆邮电大学光纤通信技术与网络重点实验室;重庆邮电大学自动化学院;
【基金】：国家自然科学基金(61275077) 重庆市教委基金(KJ 1400421) 重庆市科委基础与前沿研究项目(2015jcyj A40024)~~
【分类号】：TN929.1

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