Superfilter Technique in SDN-Controlled Elastic Optical Networks [Invited]

Paolucci, F.; Cugini, F.; Fresi, Francesco; Meloni, G.; Giorgetti, A.; Sambo, N.; Potì, L.; Castro, Alberto; Velasco, Luis; Castoldi, P.

doi:10.1364/jocn.7.00a285

Cited by 19 publications

(7 citation statements)

References 24 publications

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“…Moura et al [200], [201] have explored SDN based adaptation strategies for EDFA operating points to increase the OSNR. In a complementary study, Paolucci et al [202] have exploited SDN control to reduce the detrimental filtering effects. Paolucci group wavelength channels that jointly traverse a sequence of filters at successive switching nodes.…”

Section: Optical Performance Monitoring 1) Cognitive Network Inframentioning

confidence: 99%

Software Defined Optical Networks (SDONs): A Comprehensive Survey

Thyagaturu

Mercian

McGarry

et al. 2016

IEEE Commun. Surv. Tutorials

305

129

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The emerging Software Defined Networking (SDN) paradigm separates the data plane from the control plane and centralizes network control in an SDN controller. Applications interact with controllers to implement network services, such as network transport with Quality of Service (QoS). SDN facilitates the virtualization of network functions so that multiple virtual networks can operate over a given installed physical network infrastructure. Due to the specific characteristics of optical (photonic) communication components and the high optical transmission capacities, SDN based optical networking poses particular challenges, but holds also great potential. In this article, we comprehensively survey studies that examine the SDN paradigm in optical networks; in brief, we survey the area of Software Defined Optical Networks (SDONs). We mainly organize the SDON studies into studies focused on the infrastructure layer, the control layer, and the application layer. Moreover, we cover SDON studies focused on network virtualization, as well as SDON studies focused on the orchestration of multilayer and multidomain networking. Based on the survey, we identify open challenges for SDONs and outline future directions

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Section: Optical Performance Monitoring 1) Cognitive Network Inframentioning

confidence: 99%

Software Defined Optical Networks (SDONs): A Comprehensive Survey

Thyagaturu

Mercian

McGarry

et al. 2016

IEEE Commun. Surv. Tutorials

305

129

View full text Add to dashboard Cite

show abstract

“…Because new channels can be added later on into the previously unused gaps, and unused channels are retired at an arbitrary time, it is impractical to refer to a channel using its sequential number. 6 We chose to use the central frequency and the channel bandwidth (in the optical domain) as a means of identification. Using the upper and lower frequencies would work equally well.…”

Section: B Flexgrid Channel Planmentioning

confidence: 99%

“…On the L0, an optical network consists of an interwoven mesh of frequency channels [6]. Each and every vertex in the network graph, and, unfortunately, also each and every edge, applies a set of transformations to the carried mixture of light frequencies.…”

Section: Introductionmentioning

confidence: 99%

YANG/NETCONF ROADM: Evolving Open DWDM Toward SDN Applications

Kundrát

Vojtěch

Škoda

et al. 2018

J. Lightwave Technol.

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Evolution in the field of optical networking in National Research and Education Networks led to utilization of Alien Wavelengths (AWs) and disaggregated Open Line Systems. Dynamic provisioning of AWs, in general spectrum services, is achieved via Reconfigurable Optical Add Drop Multiplexers (ROADMs) operating with flexible spectrum allocation. Northbound interface of these is usually implemented via the NETCONF protocol and through an appropriate Yet Another Next Generation (YANG) model. This paper presents a self-contained flexible spectral grid YANG model for low-level control and monitoring of a ROADM. The presented YANG model offers access to all functional components of a modern flexgrid ROADM and enables SDN applications to access and manipulate the media layer with no required external validation. The model is verified by an SDN application which implements optical path protection of AWs. A physical demonstration with model railroad intuitively shows the accomplished functionality.

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“…A particular case of DFC is the super-filtering technique [27], consisting in the aggregation of several independent super-channels (or either single channels) within the same filter pass-band along common links. An example is shown in Fig.…”

Section: E Differentiated/enlarged Filter Bandwidthmentioning

confidence: 99%

On the Filter Narrowing Issues in Elastic Optical Networks

Fàbrega¹,

Moreolo²,

Martin³

et al. 2016

J. Opt. Commun. Netw.

Self Cite

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Abstract-This paper describes the problematic of filter narrowing effect in the context of next generation elastic optical networks. First, three possible scenarios are introduced: the transition from actual fixed-grid to a flexi-grid network; the generic full flexi-grid network; and a proposal for filterless optical network. Next, we investigate different transmission techniques and evaluate the penalty introduced by the filtering effect when considering: Nyquist WDM, SSB DD-OFDM and symbol-rate variable DP-4QAM. Also, different approaches to compensate for the filter narrowing effect are discussed. Results show that the specific needs per each scenario can be fulfilled by the aforementioned technologies and techniques, or a combination of them, when balancing performance, network reach and cost.Index Terms-Networks, optical communications, elastic optical networks, flexi-grid, WSS. I. INTRODUCTIONThe future adoption of elastic optical network (EON), mainly fostered by the advent of next technologies (e.g., media, HDTV, 5G, Internet of Things, etc.) and backed by the considerable advances of transmission techniques in terms of flexibility and capacity, is heading to undertake new challenges and goals. In fact, when adopting the flexi-grid paradigm [1], optical channels with different bandwidth occupation can coexist within the same fiber. Some of these channels, denominated as super-channels, are wider in frequency and comprise multiple sub-channels transmitted

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Superfilter Technique in SDN-Controlled Elastic Optical Networks [Invited]

Cited by 19 publications

References 24 publications

Software Defined Optical Networks (SDONs): A Comprehensive Survey

Software Defined Optical Networks (SDONs): A Comprehensive Survey

YANG/NETCONF ROADM: Evolving Open DWDM Toward SDN Applications

On the Filter Narrowing Issues in Elastic Optical Networks

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