Agile Optical Networking: Beyond Filtered Solutions

“…For example, Ref. [17] investigated FON deployment cost in MANs and Ref. [18] devised a techno-economic cost model that included capital and operational expenditure of FONs and compared it to that of active photonic networks.…”

Section: Related Workmentioning

confidence: 99%

On Dynamic Service Chaining in Filterless Optical Metro-Aggregation Networks

et al. 2020

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“…Filterless Optical Networks (FONs) are emerging as a promising technological direction to reduce cost in optical networks. In FONs, Reconfigurable Optical Add/Drop Multiplexers (ROADM), based on costly Wavelength Selective Switches (WSS), are replaced by broadcast-and-select switching architectures composed by passive splitters and combiners, which interconnect add/drop nodes via fiber trees [1]. However, due to channels' broadcast on unnecessary fiber links, FONs suffer a reduced spectral efficiency.…”

Section: Introductionmentioning

confidence: 99%

QoT-Aware Optical Amplifier Placement in Filterless Metro Networks

et al. 2021

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Filterless Optical Networks (FONs) represent a novel cost-effective solution for metro optical networks, that allows to achieve equipment-cost savings by removing expensive optical-switching components from network nodes. In this study, we investigate how to further reduce equipment cost in FONs by minimizing amplifiers' cost. We propose a Genetic Algorithm (GA) for placing boosters, inline amplifiers and pre-amplifiers in FONs with the objective of minimizing amplifiers cost. We provide two versions of the GA and compare their performance against a baseline amplifier placement in terms of amplifiers cost and quality-of-transmission (QoT), i.e., lightpaths OSNR and received power. Moreover, we provide a comparison between filterless and wavelength-switched architectures. Simulative results achieved over realistic network topologies show significant amplifier cost savings, up to 60% compared to baseline approaches.

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“…This capacity increase must be guaranteed while keeping capital expenditures (Capex) and operational expenditure (Opex) under control. Several cost-effective solutions such as, e.g., filterless networking [1][2] and wavelength-interleaved networks [3], are being investigated to replace costly state-of-the-art wavelengthswitched architectures in metro. These solutions, however, are still under investigation, and cannot be used to satisfy the current need to reduce costs in the medium-short term.…”

Section: Introductionmentioning

confidence: 99%

Minimum-Cost Optical Amplifier Placement in Metro Networks

Ibrahimi

Ayoub

Musumeci

et al. 2020

J. Lightwave Technol.

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Emerging 5G services are revolutionizing the way operators manage and optimize their optical metro networks, and the metro network design process must be rethought accordingly. In particular, minimizing network cost is crucial to curb operators' investment. Taking advantage of relatively-short distances in metro networks, operators have the opportunity to optimize the placement of optical amplifiers (OAs) with the goal of minimizing amplifiers' cost (and hence decrease network cost) without significantly affecting the quality of transmitted optical signals. Minimizing OA cost translates not only in minimizing the cost of equipment (i.e., boosters, pre-amplifiers and inline amplifiers), but also in minimizing deployment and maintenance costs of active amplifier sites. In this paper, we propose a heuristic algorithm for OA placement and for the Routing and Spectrum Assignment (RSA) in metro networks, with the objective of minimizing the total cost of OAs while guaranteeing sufficient optical signal-to-noise ratio (OSNR) of established lightpaths. In our approach, we consider different cost for the deployed OAs, according to their location and type, i.e., inline amplifiers (ILAs), boosters and pre-amplifiers, and compare our optimized placement against benchmark strategies where OAs are predeployed at network nodes and at a fixed distance one from the other along optical fiber links. We also evaluate the impact of different routing strategies on the total cost and utilized spectrum. Simulative results, performed over realistic metro network topologies, show that our strategy provides up to 47% OAs cost savings while satisfying minimum OSNR constraints.

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Agile Optical Networking: Beyond Filtered Solutions

Cited by 17 publications

References 6 publications

On Dynamic Service Chaining in Filterless Optical Metro-Aggregation Networks

On Dynamic Service Chaining in Filterless Optical Metro-Aggregation Networks

QoT-Aware Optical Amplifier Placement in Filterless Metro Networks

Minimum-Cost Optical Amplifier Placement in Metro Networks

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