Assessment of Flex-Grid/MCF Optical Networks with ROADM limited core switching capability

Rumipamba-Zambrano, Rubén; Moreno-Muro, Francisco-Javier; Pavón‐Mariño, Pablo; Perelló, Jordi; Spadaro, Salvatore; Sole-Pareta, J.

doi:10.23919/ondm.2017.7958556

Cited by 17 publications

(23 citation statements)

References 18 publications

(26 reference statements)

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“…UFRs are considered simply as a set of independent SMF whose nonlinear impairments are the same of single SMF and where independent switching (InS) [44] can be implemented. Here, however, we will apply the core continuity constraint (CCC) [45] switching technique also in UFRs. In SCMCF, the strong coupling between the cores enables nonlinear distortion mitigation (NLM) of the signal, thus improving the SNR and providing point-to-point capacity gain [46,47] when comparing to UFRs with the same SDM cardinality, i.e., number of fibers equal to the number of cores.…”

Section: Networking With Different Sdm Solutionsmentioning

confidence: 99%

Statistical Assessment of Open Optical Networks

et al. 2019

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In order to cope with the increase of the final user traffic, operators and vendors are pushing towards physical layer aware networking as a way to maximize the network capacity. To this aim, optical networks are becoming more and more open by exposing physical parameters enabling fast and reliable estimation of the lightpath quality of transmission. This comes in handy not only from the point of view of the planning and managing of the optical paths but also on a more general picture of the whole optical network performance. In this work, the Statistical Network Assessment Process (SNAP) is presented. SNAP is an algorithm allowing for estimating different network metrics such as blocking probability or link saturation, by generating traffic requests on a graph abstraction of the physical layer. Being aware of the physical layer parameters and transceiver technologies enables assessing their impact on high level network figures of merit. Together with a detailed description of the algorithm, we present a comprehensive review of several results on the networking impact of multirate transceivers, flex-grid spectral allocation as a means to finely exploit lightpath capacity and of different Space Division Multiplexing (SDM) solutions.

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Section: Networking With Different Sdm Solutionsmentioning

confidence: 99%

Statistical Assessment of Open Optical Networks

et al. 2019

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“…Las publicaciones presentadas giran en torno a una propuesta principal, la continuidad del canal espacial en redes SDM. Esta idea se evaluó inicialmente en un artículo presentado en el congreso ONDM17, donde además se presentan las ventajas de uso de un ROADM basado en esta idea [Rumip17a]. Dicho trabajo se expande sustancialmente en el análisis off-line en un contexto MCF (Multi Core Fiber) publicado en la revista Journal of Optical Communications and Networking [Moren17].…”

Section: Publicaciones Derivadas De La Tesisunclassified

“…Las contribuciones académicas de la tesis al proyecto ONOFRE se exponen en las siguientes publicaciones: [Rumip17a], [Moren17], [Pavon17], [Rumip18].…”

Section: Proyecto Onofreunclassified

“…Los resultados de esta colaboración han abierto la puerta a una posible continuación de la propia red temática de excelencia. Las contribuciones académicas en las que ha participado el doctorando dentro del contexto de tesis han sido: [Rumip17a], [Moren17], [Moren18c]…”

Section: Red De Excelencia Elastic Networkunclassified

“…El trabajo que se aborda en este capítulo ha sido presentado en los congresos internacionales ONDM [Rumip17a]…”

Section: Capítulounclassified

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Planificación y optimización de redes ópticas en el Internet del futuro

Muro¹,

Javier²

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The strict requirements required for the future 5G network, jointly with the high growth forecasts of IP traffic, mainly based on the proliferation of cloud services, create a future panorama full of uncertainties from the perspective of large optical telecommunications networks. Planning and optimization tasks are essential to ensure that the requirements are satisfied in an economically viable manner. This thesis tries to analyze, in the first place, the validity of traffic growth predictions, in the light of current applications in a scenario where the latency requirements imply the evolution of CDNs with the deployment of micro-datacenters. In particular, the effect of this traffic evolution, supported by the optical backbone networks, will be analyzed. Second, the thesis studies some options that allow addressing the expected requirements of the network, from the perspective of three major approaches: a) optimization in the design and management of CDNs, b) programmable control of the network based on software-defined networking and with virtualization in network functions and finally, c) possible introduction of the Space Division Multiplexing (SDM) technology to expand the capacity of transport networks as effective support for the increase of IP traffic. The outcomes of this work conclude, in the first instance, that the evolution of the backbone traffic in the future Internet will depend on the nature of the services that the applications offer, being the balance between user traffic and synchronization one especially determining. On the other hand, the results suggest that place the content close to the users can have direct effect of decreasing the amount of traffic supported by the core networks, in relation to the current forecasts. The use cases analyzed in the SDN-NFV environment determine the need for optimization providing flexibility and programmability in the migration to virtualized systems in the networks. This set of functionalities are essential to satisfy the requirements of the future services in the 5G paradigm. In addition, the proof of concept presented in this thesis supports the joint optimization of network and IT resources for the assistance of service chains in networks based on SDN-NFV. Finally, for SDM-based optical networks, the proposal presented for space channel restriction (SCC) emerges as a valid option to be implemented in ROADMs for flex-grid environments. The validity of this proposal lies in the significant reduction in terms of implementation cost due to its lower complexity and the current availability of the equipment, at the expense of minimal performance degradations, compared to totally permissive options.

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Space continuity constraint in dynamic Flex-Grid/SDM optical core networks: An evaluation with spatial and spectral super-channels

Rumipamba-Zambrano

Moreno-Muro

Perelló

et al. 2018

Computer Communications

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Space Division Multiplexing (SDM) appears as a promising solution to overcome the capacity limits of single-mode optical fibers. In Flex-Grid/SDM optical networks, nodes offering full interconnection between input/output fiber ports and spatial channels, typical SDM-Reconfigurable Optical Add/Drop Multiplexer (SDM-ROADM) referred to as independent switching with lane support (InS with LC support), require very complex and expensive node architectures. Alternative designs have been proposed to relax their requirements, such as those realizing Joint-switching (JoS) by switching one spectrum slice across all spatial channels at once. In this work, we evaluate the benefits of a cost-effective SDM-ROADM architecture that makes a trade-off between (i) performance in terms of network throughput and (ii) architectural complexity by forcing the Space Continuity Constraint (SCC) end-to-end, that is, along the connection physical path. The performance and architectural complexity of such a SDM-ROADM solution are compared in dynamic Flex-Grid/SDM scenarios against benchmark networks based on InS with LC support and JoS SDM-ROADMs, under both spatial and spectral super-channels. We quantify the network throughput when scaling the spatial multiplicity from 7 to 30 spatial channels, considering Multi-Fiber (MF) as well as Multi-Core Fiber (MCF) SDM solutions. The obtained results reveal that differences in terms of network throughput employing InS without LC support SDM-ROADMs is merely up to 14% lower than InS with LC support SDM-ROADMs, while the network CAPEX can be dramatically reduced by 86%. In contrast, networks employing InS without LC support SDM-ROADMs carry up to 40% higher throughput than JoS ones, whereas the network CAPEX can be raised up to 3x. This paper also analyses the spatial multiplicity impact on both network metrics (throughput and CAPEX).

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Assessment of Flex-Grid/MCF Optical Networks with ROADM limited core switching capability

Cited by 17 publications

References 18 publications

Statistical Assessment of Open Optical Networks

Statistical Assessment of Open Optical Networks

Planificación y optimización de redes ópticas en el Internet del futuro

Space continuity constraint in dynamic Flex-Grid/SDM optical core networks: An evaluation with spatial and spectral super-channels

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