In this paper, the problem of routing, modulation level, core, and spectrum assignment (RMCSA) in space-division-multiplexed elastic optical networks (SDM-EONs) is studied. We formulate this problem as a mixed-integer linear programming (MILP), in which dedicated and shared path protection schemes are supported in SDM-EONs with multi-core fibers (MCFs) and the inter-core crosstalk of MCFs is strictly modeled. Furthermore, an efficient heuristic algorithm is proposed to solve the RMCSA problem in a large scale scenario. Numerical results reveal that the formulated MILP leads to lower spectrum usage compared to the alternative methods. Moreover, the proposed heuristic algorithm performs close to the MILP formulation with lower computational run-time.

中文翻译：

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支持混合专用和共享路径保护的可存活空分复用弹性光网络中的串扰感知资源分配

在本文中，研究了空分复用弹性光网络 (SDM-EON) 中的路由、调制级别、核心和频谱分配 (RMCSA) 问题。我们将此问题表述为混合整数线性规划 (MILP)，其中具有多芯光纤 (MCF) 的 SDM-EON 支持专用和共享路径保护方案，并且对 MCF 的芯间串扰进行了严格建模。此外，提出了一种有效的启发式算法来解决大规模场景中的 RMCSA 问题。数值结果表明，与替代方法相比，制定的 MILP 导致较低的频谱使用。此外，所提出的启发式算法的性能接近于具有较低计算运行时间的 MILP 公式。