Survivable Routing, Spectrum, Core and Band Assignment in Multi-Band Space Division Multiplexing Elastic Optical Networks

• Published in: Journal of lightwave technology 2022-06, Vol.40 (11), p.3442-3455
• Main Authors: Luo, Zhihuan, Yin, Shan, Zhao, Ligang, Wang, Zhenhao, Zhang, Wenchao, Jiang, Liyou, Huang, Shanguo
• Format: Article
• Language: English
• Subjects: C-band; Crosstalk; Frequencies; Genetic algorithm (GA); Genetic algorithms; Heuristic methods; Integer programming; Linear programming; multi band (MB); Multiplexing; Networks; Optical communication; Optical fiber networks; Optical scattering; Partitioning algorithms; Raman spectra; Resource management; Routing; routing- spectrum- core-band assignment (RSCBA); Signal to noise ratio; signal-to-noise ratio (SNR); space division multiplexing (SDM); survivability; Traffic capacity
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/JLT.2022.3161502

The rapid growth in Internet traffic has contributed to the need to expand network transmission capacity. Multi-band (MB) using existing standard single-mode fibers (SMFs) in the free band is an ideal way to increase the capacity of the fiber. However, the introduction of MB has transferred space division multiplexing - elastic optical networks (SDM-EONs) to multi band-SDM-EONs (MB-SDM - EONs), and changed routing, spectrum and core assignment (RSCA) problem to the routing, spectrum, core and band assignment (RSCBA) problem. At the same time, it introduces a new issue named stimulated Raman scattering (SRS), which affects transmission quality. Although an expanded fiber can carry more services, a large number of services will be interrupted if a link fails, which will bring huge losses. Therefore, it is necessary to propose a reasonable protection strategy to ensure reliable transmission quality. In this paper, the survivable RSCBA problem in MB-SDM-EONs is studied, which copes with link failures and considers SRS in signal-to-noise ratio (SNR) analysis. In order to solve the problem, we propose a band partition protection scheme: working and protection resources are allocated in different frequency bands for increasing SNR in a fault-free network. We formulate this problem and band partition protection scheme as an integer linear programming (ILP) model, which takes into account inter-core crosstalk and SNR analysis. Furthermore, a heuristic algorithm based on genetic algorithm is proposed for large-scale networks. We evaluate the performance of the proposed approaches through experimental simulation. The results demonstrate that both proposed approaches are effective in finding the optimal solutions.