Modulation-adaptive resource allocation integrating ML-based routing and QoT estimation for elastic optical network planning

IF 4 2区计算机科学 Q1 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

Journal of Optical Communications and Networking Pub Date : 2024-11-28 DOI:10.1364/JOCN.536592

Yuansen Cheng;Shifeng Ding;Chun-Kit Chan

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Abstract

We propose a pointer network-based joint routing, modulation format, and spectrum allocation (PtrNet-RMSA) scheme to optimize the network capacity in elastic optical networks (EONs). Specifically, for a service request, EON spectra are first split into multiple spectrum window planes (SWPs), regarding various numbers of contained frequency slots (FSs). Then, over each SWP, a lightpath with an optimal estimated quality of transmission (QoT) is generated using a PtrNet-based routing agent. Further, different modulation formats are verified for the generated lightpath over the considered SWP, with respect to a calculated QoT threshold, to check whether a specific preforward error correction (FEC) requirement can be satisfied. Finally, two heuristic approaches, first fit and highest fit, are applied in the joint RMSA to select an optimal lightpath of an SWP and modulation format. To evaluate the efficiency of the PtrNet-RMSA scheme, extensive simulations were conducted in EONs with dynamic traffic. Results show that the proposed PtrNet-RMSA scheme can significantly improve the network capacity with various network topologies, compared with two benchmarks.

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调制自适应资源分配集成了基于 ML 的路由选择和 QoT 估算，用于弹性光网络规划

我们提出了一种基于指针网络的联合路由、调制格式和频谱分配（PtrNet-RMSA）方案，以优化弹性光网络（EON）中的网络容量。具体来说，对于一个服务请求，EON 频谱首先被分割成多个频谱窗口平面（SWP），其中包含不同数量的频隙（FS）。然后，在每个 SWP 上，使用基于 PtrNet 的路由代理生成具有最佳估计传输质量（QoT）的光路径。此外，根据计算出的 QoT 门限，对在所考虑的 SWP 上生成的光路验证不同的调制格式，以检查是否能满足特定的前向纠错（FEC）要求。最后，在联合 RMSA 中应用了两种启发式方法（首次拟合和最高拟合），以选择 SWP 和调制格式的最佳光路。为了评估 PtrNet-RMSA 方案的效率，我们在具有动态流量的 EON 中进行了大量模拟。结果表明，与两个基准相比，所提出的 PtrNet-RMSA 方案能显著提高各种网络拓扑结构的网络容量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Optical Communications and Networking 工程技术-电信学

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.