最密集弱耦合多芯光纤的布局设计,最大限度降低网络阻塞率

IF 4 2区 计算机科学 Q1 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE
Yuya Seki;Yosuke Tanigawa;Yusuke Hirota;Hideki Tode
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引用次数: 0

摘要

抑制影响每个光路的纤芯间串扰(IC-XT)对于使用多纤芯光纤(MCF)的空间分复用弹性光网络(SDM-EON)的资源分配至关重要。为了抑制 IC-XT,人们广泛采用了资源分配方法,即限制构成每个光路的 MCF 同时使用同一频段的相邻内核。然而,从原理上讲,这种方法效率低下,因为它们无法充分利用所有内核。本研究从弱耦合 MCF 的磁芯布局和 IC-XT 抑制要求的角度研究了磁芯密度。最密集的 MCF 布局既能最大限度地提高网络容量,又能将每个光路的 IC-XT 量限制在容差阈值内。具体来说,我们提出了无 XT 条件,将每个光路的 IC-XT 量保持在可接受的容差范围内。此外,我们还评估了各种网络拓扑结构和包层直径下满足或不满足无 XT 条件的众多 MCF。与传统的资源分配方法相比,该评估还验证了拟议框架的 IC-XT 减少性能。在这里,我们纳入了我们的间接 IC-XT 计算方法,该方法通过其最近的内核影响来自其他内核的光路,而这在资源分配问题中被忽视了。在这些综合研究的基础上,我们提出了一种方法,用于确定给定网络拓扑和路由及调制格式选择算法下的最密集核心布局。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Layout design of densest weakly coupled multi-core fibers to minimize the network blocking rate
The suppression of inter-core crosstalk (IC-XT) that affects each lightpath is crucial for resource allocation in space-division multiplexing elastic optical networks (SDM-EONs) with multi-core fibers (MCFs). Resource allocation approaches that limit the simultaneous use of adjacent cores in the same frequency band to the MCFs composing each lightpath have been widely adopted to suppress IC-XT. However, in principle, such methods are inefficient because they cannot fully utilize all cores. This study examines the core density from the perspective of the core layout in weakly coupled MCFs and the IC-XT suppression requirement. The densest MCF layout maximizes the network capacity while restricting the amount of IC-XT within the tolerance threshold for each lightpath. Specifically, we propose an XT-free condition, maintaining the IC-XT to each lightpath within the acceptable tolerance level. In addition, we evaluated numerous MCFs that satisfy or do not satisfy the XT-free condition with various network topologies and cladding diameters. This evaluation also validates the IC-XT reduction performance of the proposed framework compared with that of the conventional resource-allocation approach. Here, we incorporate our indirect IC-XT calculation method that affects lightpaths from other cores via its nearest cores, which was overlooked in the resource allocation problem. Based on these comprehensive examinations, we propose a method to determine the densest core layout for a given network topology and route and modulation format selection algorithm.
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来源期刊
CiteScore
9.40
自引率
16.00%
发文量
104
审稿时长
4 months
期刊介绍: The scope of the Journal includes advances in the state-of-the-art of optical networking science, technology, and engineering. Both theoretical contributions (including new techniques, concepts, analyses, and economic studies) and practical contributions (including optical networking experiments, prototypes, and new applications) are encouraged. Subareas of interest include the architecture and design of optical networks, optical network survivability and security, software-defined optical networking, elastic optical networks, data and control plane advances, network management related innovation, and optical access networks. Enabling technologies and their applications are suitable topics only if the results are shown to directly impact optical networking beyond simple point-to-point networks.
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