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Crosstalk-Aware Shared Backup Path Protection in Multi-Core Fiber Elastic Optical Networks
Journal of Lightwave Technology ( IF 4.7 ) Pub Date : 2021-03-09 , DOI: 10.1109/jlt.2021.3064935 Fengxian Tang , Gangxiang Shen , George N. Rouskas
Journal of Lightwave Technology ( IF 4.7 ) Pub Date : 2021-03-09 , DOI: 10.1109/jlt.2021.3064935 Fengxian Tang , Gangxiang Shen , George N. Rouskas
Elastic optical networks employing multi-core fibers (MCF-EON) have the potential to expand significantly the transmission capacity of optical transport. However, wide deployment of such networks depends on addressing effectively two critical challenges: inter-core crosstalk, which may cause serious signal performance degradation in an MCF link, and survivability against network failures that may cause enormous data loss. In this article, we consider the design of MCF-EONs with shared-backup path protection (SBPP), one of the most efficient techniques for protecting network traffic. Specifically, we tackle the crosstalk-aware routing, core, and spectrum assignment (CA-RCSA) problem with the objective of jointly minimizing the network spectrum resources used and the total inter-core crosstalk. We formulate the problem as an integer linear programming (ILP) model subject to strict inter-core crosstalk limits for each provisioned lightpath, and we also propose an auxiliary graph (AG) based heuristic algorithm for lightpath provisioning. Simulation studies show that our algorithm is effective in terms of the objectives, and it is efficient to perform close to the ILP model in small networks, for which solving the ILP is feasible.
中文翻译:
多核光纤弹性光网络中可识别串扰的共享备份路径保护
采用多芯光纤(MCF-EON)的弹性光网络有可能显着扩展光传输的传输容量。但是,此类网络的广泛部署取决于有效地解决两个关键挑战:内核间串扰(可能会导致MCF链路中的信号性能严重下降)以及针对可能导致巨大数据丢失的网络故障的生存能力。在本文中,我们考虑带有共享备份路径保护(SBPP)的MCF-EON的设计,这是保护网络流量的最有效技术之一。具体来说,我们解决串扰感知路由,核心和频谱分配(CA-RCSA)问题,以共同最小化所使用的网络频谱资源和总核心间串扰为目标。我们将问题表述为一个整数线性规划(ILP)模型,该模型要对每个预配置的光路进行严格的内核间串扰限制,并且还提出一种基于辅助图(AG)的启发式算法进行光路预配置。仿真研究表明,我们的算法在目标方面是有效的,并且在解决ILP可行的小型网络中执行接近ILP模型的效率很高。
更新日期:2021-05-11
中文翻译:
多核光纤弹性光网络中可识别串扰的共享备份路径保护
采用多芯光纤(MCF-EON)的弹性光网络有可能显着扩展光传输的传输容量。但是,此类网络的广泛部署取决于有效地解决两个关键挑战:内核间串扰(可能会导致MCF链路中的信号性能严重下降)以及针对可能导致巨大数据丢失的网络故障的生存能力。在本文中,我们考虑带有共享备份路径保护(SBPP)的MCF-EON的设计,这是保护网络流量的最有效技术之一。具体来说,我们解决串扰感知路由,核心和频谱分配(CA-RCSA)问题,以共同最小化所使用的网络频谱资源和总核心间串扰为目标。我们将问题表述为一个整数线性规划(ILP)模型,该模型要对每个预配置的光路进行严格的内核间串扰限制,并且还提出一种基于辅助图(AG)的启发式算法进行光路预配置。仿真研究表明,我们的算法在目标方面是有效的,并且在解决ILP可行的小型网络中执行接近ILP模型的效率很高。