SNR Re-Verification-Based Routing, Band, Modulation, and Spectrum Assignment in Hybrid C-C+L Optical Networks

Yao, Qiuyan; Yang, Hui; Bao, Bowen; Zhang, Jie; Wang, Hanning; Ge, Dawei; Liu, Sheng; Wang, Dong; Li, Yunbo; Zhang, Dechao; Li, Han

doi:10.1109/jlt.2022.3170332

Cited by 32 publications

(6 citation statements)

References 46 publications

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“…For each request, we compute K = 3 primary paths, and for each primary path, K b = 3 backup paths (disjoint from the primary path) are determined. Additionally, other pertinent physical parameters are concisely summarized in paper [33].…”

Section: Simulation Results and Analysismentioning

confidence: 99%

Fragmentation and ISRS-Aware Survivable Routing, Band, Modulation, and Spectrum Allocation Algorithm in Multi-Band Elastic Optical Networks

Liu,

Feng,

Shen

et al. 2024

Applied Sciences

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The C+L band elastic optical networks (C+L-EONs) increase the network capacity significantly. However, the introduction of an L band enhances the inter-channel stimulated Raman scattering effect (ISRS), consequently deteriorating the quality of transmission (QoT) of the signal. Furthermore, spectrum allocation leads to spectrum fragmentation inevitably, which escalates the bandwidth blocking rate. In addition, in C+L-EONs, a single fiber carries more services, and once one of the links fails, a huge number of requests will be interrupted, resulting in huge economic losses. Therefore, this paper proposes a survivability routing, band, modulation, and spectrum allocation (RBMSA) algorithm that effectively guarantees service survivability and reduces the impact of ISRS and spectrum fragmentation. The algorithm employs shared backup path protection and a band partitioning method, whereby the spectrum resource of the primary path is assigned in the L band and the backup path is assigned in the C band in order to minimize the impact of ISRS on the QoT of the request while ensuring the survivability of the network. Furthermore, a fragmentation metric accounting for both the free and shared spectrum resource is proposed to mitigate both free and shared spectrum fragmentation. The simulation results reveal that the proposed RBMSA algorithm reduces the bandwidth blocking probability (BBP) and the fragmentation rate (FR) by 47.7% and 21.3%, respectively, and improves the optical signal-to-noise ratio (OSNR) by 4.17 dB in NSFNET. In COST239, the BBP, FR, and OSNR are 22.1%, 21.5%, and 4.71 dB, respectively.

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Section: Simulation Results and Analysismentioning

confidence: 99%

Fragmentation and ISRS-Aware Survivable Routing, Band, Modulation, and Spectrum Allocation Algorithm in Multi-Band Elastic Optical Networks

Liu,

Feng,

Shen

et al. 2024

Applied Sciences

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“…Bao et al [27] proposed a technique called link-oriented resource balancing (LoRB) to select a block of frequency slots for spectrum assignment such that the contiguous available resource separation degree (CARSD) for the transmission path is minimum. Yao et al [18] proposed an RBMLSA algorithm for hybrid C/C + L networks, which is aware of the interactive effect of the ISRS impairment that new requests might have on the existing requests. Moreover, different policies for the spectrum assignment under a hybrid C/C + L network were introduced.…”

Section: Related Workmentioning

confidence: 99%

“…Moreover, different policies for the spectrum assignment under a hybrid C/C + L network were introduced. However, [27] and [18] do not address how to plan the C/C + L network, i.e., how to determine which subset of links should provide C + L transmission capabilities.…”

Section: Related Workmentioning

confidence: 99%

“…In this way, it is necessary to identify which fibers (and associated equipment) should be migrated first. On the other hand, once a network has been fully or partially migrated, the use of different spectral bands brings another dimension to the operation mechanisms of EONs, moving from the routing, modulation level, and spectrum assignment (RMLSA) problem [16] to the routing, band, modulation level, and spectrum assignment (RBMLSA) problem in MB-EON [17,18].…”

Section: Introductionmentioning

confidence: 99%

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Migration of elastic optical networks to the C + L-bands subject to a partial upgrade of the number of erbium-doped fiber amplifiers

Hosseini¹,

Miguel²,

Álvarez³

et al. 2023

J. Opt. Commun. Netw.

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Space division multiplexing (SDM) and band division multiplexing (BDM) are considered promising technologies to increase the capacity of optical transport networks. The progressive shortage of available dark fibers and the immaturity of multicore and multimode fibers for multichannel transmission induce network operators to postpone the process of capacity enhancement through SDM. Therefore, capacity increase revolves around BDM by lighting up at least the L-band of the already installed optical fiber infrastructure, which is a practical solution in the short to middle term. However, L-band activation requires the upgrade of network components such as erbium-doped fiber amplifiers (EDFAs). To manage the imposed cost while leveraging the L-band, a network can be partially rather than fully migrated in a single step by upgrading just a subset of the fibers and thus a subset of EDFAs to operate in the C+L-bands. In this paper, the focus is set on determining which fibers in the network should be upgraded to exploit the L-band, subject to a constraint on the maximum number of EDFAs to be upgraded, and analyzing its impact on network performance when facing dynamic traffic in terms of the blocking ratio. To this end, three heuristic algorithms, each pursuing a different objective, and two of them based on an integer linear programming (ILP) formulation, are proposed for the network planning to identify which fibers to upgrade. Simulation results demonstrate that, thanks to the use of these heuristics, the upgrade of a partial set of links to the C+L line system is a viable solution for network operators to circumvent the huge cost associated with migrating the full network. For instance, we demonstrate that a strategic partial upgrade using the proposed methods, subject to upgrading a maximum of 60% of the EDFAs, can significantly boost the supported traffic load in the examined topologies, ranging from 175% to 322%, when compared to the non-upgraded network.

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“…Basicamente, observam-se apenas três tipos de arquiteturas de nó e de enlace na literatura, são eles: (1) AP, AL[s + 1], PA [1], [6]- [9]; (2) AP, AL[s], PA [10]- [13] e (3) AL[s] [2], [5], [14]- [32]. O primeiro utiliza amplificadores de potência e pré-amplificadores nos nós e considera que os amplificadores de linha compensam s+1 trechos de fibra óptica ao longo dos enlaces de um determinado caminho óptico.…”

Section: Estado Da Arteunclassified

Análise de Desempenho de Arquiteturas de Nó e de Enlace em Redes Ópticas Multibandas

Sarmento,

Arcanjo,

Pereira

2023

Anais Do XLI Simpósio Brasileiro De Telecomunicações E Processamento De Sinais

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Resumo-Neste artigo, analisam-se arquiteturas de nó e de enlace disponíveis na literatura, considerando o contexto de redes ópticas multibandas. Para isso, o ruído de emissão espontânea amplificada, gerado pela presença dos amplificadores ópticos na rede, é deduzido para cada uma delas e são analisadas três bandas de transmissão (S, C e L). Os resultados obtidos mostram que, para uma das arquiteturas de nó e de enlace mais utilizadas na literatura, seu desempenho é inferior frente às demais em termos de probabilidade de bloqueio de chamadas e potência óptica de entrada por fatia espectral.

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SNR Re-Verification-Based Routing, Band, Modulation, and Spectrum Assignment in Hybrid C-C+L Optical Networks

Cited by 32 publications

References 46 publications

Fragmentation and ISRS-Aware Survivable Routing, Band, Modulation, and Spectrum Allocation Algorithm in Multi-Band Elastic Optical Networks

Fragmentation and ISRS-Aware Survivable Routing, Band, Modulation, and Spectrum Allocation Algorithm in Multi-Band Elastic Optical Networks

Migration of elastic optical networks to the C + L-bands subject to a partial upgrade of the number of erbium-doped fiber amplifiers

Análise de Desempenho de Arquiteturas de Nó e de Enlace em Redes Ópticas Multibandas

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