Crosstalk-Aware Core and Spectrum Assignment in a Multicore Optical Link With Flexible Grid
Crosstalk-Aware Core and Spectrum Assignment in a Multicore Optical Link With Flexible Grid
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DOI：
10.1109/tcomm.2018.2881697
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发表时间：
2019-03
影响因子：
8.3
通讯作者：
C. Rottondi;P. Martelli;P. Boffi;L. Barletta;M. Tornatore
中科院分区：
文献类型：
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作者：
C. Rottondi;P. Martelli;P. Boffi;L. Barletta;M. Tornatore
多芯光纤（MCF）是空分复用的主要技术推动者之一。原则上，MCF可以将光纤容量缩放等于芯数的因子，但在实践中，由于相邻发光芯之间的芯间串扰而导致的传输损伤阻碍了这种增加。这种串扰的实体取决于纤芯的数量及其在光纤包层内的布置，还取决于传输所用的波特率和调制格式。由于第一MCF应用程序预计在点对点系统，在本文中，我们集中在一个单一的链接的资源分配。具体而言，我们研究了波特率，调制格式，核心和频谱分配问题，在多核灵活的网格链路，考虑距离自适应达到不同的波特率，调制格式，和串扰损害。我们证明了这个问题是NP难的，并提供了两个整数线性规划，以及启发式方法来解决它在大/实际的交通情况。我们的问题配方纳入建模的确切核心间串扰的贡献取决于点燃的邻居核心的数量。数值结果提供了一个高空间效率的19芯光纤考虑不同的传输损伤条件。
Multicore fibers (MCFs) are one of the main technological enablers for space-division multiplexing. In principle, MCFs could scale the fiber capacity by a factor equal to the number of cores, but in practice such increase is hindered by transmission impairments due to the inter-core crosstalk between adjacent lit cores. The entity of such crosstalk depends on the number of cores and on their disposition within the fiber cladding, and also on the baud rate and modulation format used for transmission. As first MCF applications are expected over point-to-point systems, in this paper we concentrate on the resource allocation over a single link. Specifically, we study the Baud rate, Modulation format, Core and Spectrum Assignment problem in a multicore flexi-grid link, considering distance-adaptive reaches for different baud rates, modulation formats, and crosstalk impairments. We show that the problem is NP-hard and provide two integer linear programs, as well as heuristic approaches to solve it over large/practical traffic instances. Our problem formulations incorporate modeling of the exact inter-core crosstalk contributions depending on the number of lit neighbor cores. Numerical results are provided in a high-spatial-efficiency 19-core fiber considering different transmission impairment conditions.