Flexible metro network architecture based on wavelength blockers and coherent transmission

Dochhan, Annika; Emmerich, Robert; Berenguer, Pablo Wilke; Schubert, C.; Fischer, Johannes; Eiselt, Michael; Elbers, Jörg-Peter

doi:10.1049/cp.2019.0965

Cited by 8 publications

(4 citation statements)

References 7 publications

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“…Optical couplers combine two or more wavelengths in the same fiber or distribute the signal strength of one fiber over several other fibers [68]. Blockers are used in conjunction with couplers and splitters to limit the passage of certain wavelengths, ensuring that only the necessary signal is transmitted [69]. When choosing these devices, it must take into account the type of operating bands and fiber mode that will be used, as single-mode fiber devices are different from multimode fiber devices.…”

Section: B Architecture Componentsmentioning

confidence: 99%

Metropolitan Optical Networks: A Survey on New Architectures and Future Trends

Sousa¹,

Drummond²

2022

Preprint

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Metropolitan optical networks are undergoing major transformations to continue being able to provide services that meet the requirements of the applications of the future. The arrival of the 5G will expand the possibilities for offering IoT applications, autonomous vehicles, and smart cities services while imposing strong pressure on the physical infrastructure currently implemented, as well as on static traffic engineering techniques that do not respond in an agile way to the dynamic and heterogeneous nature of the upcoming traffic patterns. In order to guarantee the strictest quality of service and quality of experience requirements for users, as well as meeting the providers' objectives of maintaining an acceptable trade-off between cost and performance, new architectures for metropolitan optical networks have been proposed in the literature, with a growing interest starting from 2017. However, due to the proliferation of a dozen of new architectures in recent years, many questions need to be investigated regarding the planning, implementation, and management of these architectures, before they could be considered for practical application. This work presents a comprehensive survey of the new proposed architectures for metropolitan optical networks. Firstly, the main data transmission systems, equipment involved, and the structural organization of the new metro ecosystems are discussed. The already established and the novel architectures are presented, highlighting its characteristics and application, and comparative analysis among these architectures is carried out identifying the future technological trends. Finally, outstanding research questions are drawn to help direct future research on the field. Among the conclusions of this survey, the application of flexible spectrum allocation technologies seems to be the right, and necessary, evolution path for metropolitan optical network architectures.

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Section: B Architecture Componentsmentioning

confidence: 99%

Metropolitan Optical Networks: A Survey on New Architectures and Future Trends

Sousa¹,

Drummond²

2022

Preprint

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“…We propose to use a solution process, in which the column generation technique is used to solve the linear relaxation of problem ( 1)- (7). Section III presented the mathematical model of the so-called master problem in the context of Dantzig-Wolfe decomposition associated with column generation algorithm.…”

Section: Solution Processmentioning

confidence: 99%

“…In spite of a decrease in the spectrum efficiency, more authors are studying filterless optical networks today, and we can see studies investigating the wasted spectrum on the static planning case (filterless) vs. dynamic planning case (filtered node), see, e.g., Pavon-Marino et al [2]. The addition of blockers offers a mean to improve the efficiency of spectrum utilization, see, e.g., Dochhan et al [7].…”

Section: Introductionmentioning

confidence: 99%

Dantzig–Wolfe decomposition for the design of filterless optical networks

Jaumard¹,

Wang²,

Coudert

2021

J. Opt. Commun. Netw.

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Filterless optical networks use passive splitters and combiners with coherent optics, providing wavelength selection in the digital domain, while forming a passive fiber-tree topology between nodes. In this study, we investigate the optimal design of filterless optical networks while minimizing the number of required wavelengths.We propose a Dantzig-Wolfe decomposition model in which each subproblem aims to generate a potential filterless optical subnetwork, with a directed tree topology. The master problem then selects the best combination of subnetworks.Numerical experiments demonstrate significant performance improvement over previous work, reducing previous computational results by a factor of 2 to 10 depending on the size of the data instances.

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“…At the AMENs, edge data centers (DC) are located, to enable time critical computations close to the end-user, while less latency-sensitive and larger storage requiring functions can be placed in regional or core DC. Various concepts for modulation node architecture were investigated within the project, spanning from low-cost white-box ROADMs [3], to completely filterless architecture [4], using direct detection or coherent transmission [5,6]. For the demonstration, a semi-filterless architecture is chosen, where add/drop nodes are realized by splitters and couplers with wavelength blockers (WB) in between.…”

Section: Metro Network Topologymentioning

confidence: 99%