Results 301 to 310 of about 136,047 (338)

Flexible Modulation for Elastic Optical Networks

Asia Communications and Photonics Conference 2015, 2015
We present and compare state-of-the-art programmable modulation and coding techniques that efficiently utilize bandwidth and SNR on emerging elastic optical networks.
Noman L. Swenson, Damian Morero
openaire   +1 more source

Complex Elastic Optical Network Simulator (CEONS)

2015 17th International Conference on Transparent Optical Networks (ICTON), 2015
This paper presents the features of an advanced software simulator for the Elastic Optical Network (EON) - Complex Elastic Optical Networks Simulator (CEONS). The CEONS is as a test environment for solving three main issues addressed in EON: Routing and Spectrum Assignment (RSA) problems; Routing, Modulation and Spectrum Assignment (RMSA) problems, and
Michal Aibin, Mateusz Blazejewski
openaire   +1 more source

QoT Aware Adaptive Elastic Optical Networks

Optical Fiber Communication Conference, 2017
Operating Elastic Optical Networks with low margins increases their efficiency but suffers from soft-failures, rendering the QoT of lightpaths unacceptable. We present a toolkit that leverages the flexibility dimensions to survive against QoT problems.
Sartzetakis, I., Christodoulopoulos, K., Varvarigos, E.   +2 more
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Multilayer restoration in elastic optical networks

2015 International Conference on Optical Network Design and Modeling (ONDM), 2015
Optical restoration is known to be an effective way to save on network overall cost, using the same available equipment previously used before the failure occurs. However, when backup paths are too long, some regenerators can be required bringing into question the expected gain. In this work, we show that transponder datarate elasticity is a successful
Amar, D., Le Rouzic, Esther, Brochier, Nicolas, Lepers, Catherine   +3 more
openaire   +2 more sources

Cross-Layer Adaptive Elastic Optical Networks

Journal of Optical Communications and Networking, 2018
Optical networks are designed to be operated statically: lightpaths are provisioned for uninterrupted operation for several years using high margins to anticipate the deterioration of their quality of transmission (QoT) from various factors (equipment aging, malfunctioning, and maintenance operations).
Sartzetakis, Ippokratis, Christodoulopoulos, Konstantinos, Varvarigos, Emmanuel   +2 more
openaire   +1 more source

Elastic optical networking: An operators perspective

2014 The European Conference on Optical Communication (ECOC), 2014
Although there is perhaps an acceptance that EON has benefits, there is a debate about whether a full flexgrid implementation is required to achieve those benefits. Current industry debate addressed in this paper relates to when is the most appropriate time for carriers to: (a) install flexgrid ready components, and (b) enable them and start using the ...
Juan Pedro Fernandez-Palacios, Victor Lopez, Beatriz Cruz, Oscar Gonzalez de Dios   +3 more
openaire   +1 more source

Elastic optical networks

2013
The current generation of optical networks based on a fixed wavelength grid and on fixed-rate transponders would impose relevant limitations for future transmission rates exceeding 100 Gb/s, thereby limiting the number of potential implementations and making a new generation of elastic optical networks (EON) necessary.
Bohn, Mark, Napoli, Antonio, D'errico, Antonio, Ferraris, Giuseppe, Gunkel, Matthias, Jimenez, Felipe, Fernandez-Palacios, Juan Pedro, Layec, Patricia, Zervas, Georgios, Amaya Gonzalez, Norberto, Simeonidou, Dimitra, Fischer, Johannes Karl, Nolle, Markus, Schubert, Colja, Sambo, Nicola, Cugini, Filippo, Castoldi, Piero, Svaluto Moreolo, Michela, M. Fabrega, Josep, Okonkwo, Chigo, Waardt, Huug de   +20 more
openaire   +2 more sources

Upgrading Optical Networks with Elastic Transponders

European Conference and Exhibition on Optical Communication, 2012
We show how rate-adaptive transponders help reduce the cost of optical networks compared to single and mixed-line-rate solutions through a better ability to accommodate growth of traffic and uncertainties in traffic matrices during network upgrades.
Olivier Rival, Annalisa Morea, Hamza Drid, Nicolas Brochier, Esther Le Rouzic   +4 more
openaire   +1 more source

Partial defragmentation in elastic optical networks

2014 16th International Conference on Transparent Optical Networks (ICTON), 2014
In elastic optical networks, the lightpaths setup and tear down processes may cause the so-called spectrum fragmentation issue, degrading spectrum utilization, increasing lightpath rejection ratio, and this is especially critical under dynamic traffic scenarios.
Jie Luo, Zitian Zhang, Weiqiang Sun, Weisheng Hu   +3 more
openaire   +1 more source

Taking Advantage of Elastic Optical Networks

2016
This chapter shows how the new paradigm of Elastic Optical Networks (EON) is changing the way we perceive networking. The mode of operation of EON is described and the potential gains are outlined, followed by Use-Cases outlining how flex-grid technology can be advantageous for multi-layer resiliency, for serving metro networks and finally for data ...
Alexandros Stavdas, Chris Matrakidis, Matthias Gunkel, Adrian Asensio, Luis Velasco, Emmanouel Varvarigos, Kostas Christodoulopoulos   +6 more
openaire   +1 more source