Demonstration of Flexible Optical Network Based on Path Computation Element

Cugini, F.; Meloni, G.; Paolucci, F.; Sambo, N.; Secondini, Marco; Gerardi, L.; Potì, L.; Castoldi, P.

doi:10.1109/jlt.2011.2180361

Cited by 80 publications

(46 citation statements)

References 22 publications

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“…A path computation element (PCE) architecture for flexible optical networks has been demonstrated in [105] that maximizes the spectral efficiency. Confirmation was provided through two different experiments; they successfully showed the PCE ability to trigger dynamic rerouting with bit-rate or modulation format adaptation.…”

Section: G Networking Cost Of Sbvtmentioning

confidence: 99%

Routing and Spectrum Allocation in Elastic Optical Networks: A Tutorial

Chatterjee

Sarma

Oki

2015

IEEE Commun. Surv. Tutorials

584

240

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Flexgrid technology is now considered to be a promising solution for future high-speed network design. In this context, we need a tutorial that covers the key aspects of elastic optical networks. This tutorial paper starts with a brief introduction of the elastic optical network and its unique characteristics. The paper then moves to the architecture of the elastic optical network and its operation principle. To complete the discussion of network architecture, this paper focuses on the different node architectures, and compares their performance in terms of scalability and flexibility. Thereafter, this paper reviews and classifies routing and spectrum allocation (RSA) approaches including their pros and cons. Furthermore, various aspects, namely -fragmentation, modulation, quality-of-transmission, traffic grooming, survivability, energy saving, and networking cost related to RSA, are presented. Finally, the paper explores the experimental demonstrations that have tested the functionality of the elastic optical network, and follows that with the research challenges and open issues posed by flexible networks.Index Terms-Elastic optical networks, node architecture, spectrum management, routing and spectrum allocation, and sliceable bandwidth-variable transponder.

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Section: G Networking Cost Of Sbvtmentioning

confidence: 99%

Routing and Spectrum Allocation in Elastic Optical Networks: A Tutorial

Chatterjee

Sarma

Oki

2015

IEEE Commun. Surv. Tutorials

584

240

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“…Data plane nodes are located in network 10.10.0.X. The controllers operate on a flexgrid test-bed derived from [23], including 100 Gb/s polarization multiplexed quadrature phase shift keying (PM-QPSK) optical signals and bandwidth variable cross-connects. Fig.…”

Section: B Experimental Assessmentmentioning

confidence: 99%

First Experimental Assessment of ABNO-Driven In-Operation Flexgrid Network Re-Optimization

Gifre

Paolucci

Velasco

et al. 2015

J. Lightwave Technol.

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Abstract-Traffic affected by link failures can be recovered using path restoration schemes. In dynamically operated networks provided with a control plane, restoration algorithms run in a centralized element, such as the Path Computation Element (PCE). To increase traffic restorability in flexgrid networks, multiple paths, sub-connections, can be used to restore every single affected connection. However, the multipath restoration scheme might result in a poor resource utilization entailing a lesser grade of service. In-operation network planning algorithms can be used to mitigate this problem once the failed link is repaired; we propose solving the so-called multipath after failure repair optimization problem (MP-AFRO) to reduce sub-connections count by aggregating those belonging to the same original connection and re-routing the resulting connection to release spectral resources. The MP-AFRO problem is modelled using a Mixed Integer Linear Program (MILP) formulation. In view of the complexity of the model and the limited time to solve the problem, we propose a heuristic algorithm that provides a good trade-off between complexity and optimality. The performance on the MP-AFRO heuristic is firstly validated by simulation. Next, the heuristic algorithm is deployed inside an in-operation planning tool in the form of back-end PCE (bPCE) inside the Application-based Network Operations (ABNO) architecture controlling a network; the bPCE is connected to the centralized active stateful PCE. MP-AFRO is experimentally demonstrated using a distributed field trial test-bed connecting the premises of Telefonica (Madrid), CNIT (Pisa), and UPC (Barcelona).

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“…It is shown that 12.5 GHz spacing is satisfactory to guarantee efficient network resource utilization for the expected modulation formats at 400 Gb/s. In [28] an experimental demonstration shows the capability of the PCE to trigger dynamic rerouting with bit-rate or modulation format adaptation. Dynamic frequency slot assignment and format adaptation from DP-16QAM to DP-QPSK at 100 Gb/s, and bit-rate adaptation at DP-16QAM from 200 Gb/s to 100 Gb/s is demonstrated.…”

Section: Control Plane For Flexible Optical Networkmentioning

confidence: 99%

A survey of recent developments on flexible/elastic optical networking

Tomkos

Palkopoulou

Angelou

2012

2012 14th International Conference on Transparent Optical Networks (ICTON)

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There is a growing awareness that the utilized bandwidth of deployed optical fiber is rapidly approaching its maximum limit. Given the possibility for such capacity crunch, the research community has focused on seeking solutions that make the most out of the scarce network resources (such as the fiber bandwidth) and allow accommodating the ever-increasing traffic demands. In such context, new spectrum efficient optical networking techniques have been introduced as a way to offer efficient utilization of the available optical resources. "Flexible", "elastic", "tunable", "gridless" or "adaptive" are few examples of the terms used in literature to describe solutions that migrate from the fixed WDM single line rate systems to systems that provide support for the most efficient bandwidth utilization. In this paper, we review the recent developments on the research topic of flexible/elastic networking and we highlight the future research challenges.

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Demonstration of Flexible Optical Network Based on Path Computation Element

Cited by 80 publications

References 22 publications

Routing and Spectrum Allocation in Elastic Optical Networks: A Tutorial

Routing and Spectrum Allocation in Elastic Optical Networks: A Tutorial

First Experimental Assessment of ABNO-Driven In-Operation Flexgrid Network Re-Optimization

A survey of recent developments on flexible/elastic optical networking

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