Crosstalk-Aware Shared Backup Path Protection in Multi-Core Fiber Elastic Optical Networks
Crosstalk-Aware Shared Backup Path Protection in Multi-Core Fiber Elastic Optical Networks
复制标题
DOI：
10.1109/jlt.2021.3064935
复制
发表时间：
2021-05
影响因子：
4.7
通讯作者：
Fengxian Tang;G. Shen;G. Rouskas
中科院分区：
文献类型：
--
作者：
Fengxian Tang;G. Shen;G. Rouskas
采用多芯光纤的弹性光网络（MCF-EON）具有显著扩展光传输容量的潜力。然而，这种网络的广泛部署取决于有效地解决两个关键挑战：核间串扰，这可能会导致MCF链路中的严重信号性能下降，以及对可能导致大量数据丢失的网络故障的生存能力。在这篇文章中，我们考虑的MCF-EON的设计与共享备份路径保护（SBPP），最有效的技术之一，保护网络流量。具体来说，我们解决了串扰感知路由，核心和频谱分配（CA-RCSA）的问题，共同减少使用的网络频谱资源和总的核心间串扰的目标。我们制定的问题作为一个整数线性规划（ILP）模型受到严格的核心间串扰限制为每个规定的光路，我们还提出了一个辅助图（AG）为基础的启发式算法光路供应。仿真研究表明，该算法在目标方面是有效的，并且在小网络中的性能接近ILP模型，因此求解ILP是可行的。
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.