In space division multiplexing-elastic optical networks (SDM-EONs), crosstalk and fragmentation are the significant factors determining overall resource utilization. Crosstalk and fragmentation management spectral resource allocation schemes can enhance the overall resource utilization in SDM-EONs. This paper proposes three crosstalk and fragmentation management bi-directional resource allocation schemes for multi-core SDM-EONs to suppress inter-core crosstalk and network fragmentation. A spatial resource partitioning method is presented to mitigate inter-core crosstalk, and this paper adopts a k-shortest path routing method to suppress fragmentation while spectral resource allocation. To the best of our knowledge, there is no such scheme that handles both crosstalk and fragmentation together while allocating spectral resources in a counter-propagating manner for multi-core fiber (MCF) SDM-EONs. The estimated result shows that the proposed scheme outperforms the traditional co-propagation method and enhances existing resource utilization by reducing blocked requests.

在空分复用弹性光网络 (SDM-EON) 中，串扰和碎片是决定整体资源利用率的重要因素。串扰和分段管理频谱资源分配方案可以提高 SDM-EON 中的整体资源利用率。本文针对多核 SDM-EON 提出了三种串扰和碎片管理双向资源分配方案，以抑制内核间串扰和网络碎片。提出了一种空间资源划分方法来缓解核间串扰，本文在频谱资源分配时采用k-最短路径路由方法来抑制碎片。据我们所知，没有这样的方案可以同时处理串扰和碎片，同时以反向传播的方式为多芯光纤 (MCF) SDM-EON 分配频谱资源。估计结果表明，所提出的方案优于传统的协同传播方法，并通过减少阻塞请求来提高现有资源的利用率。