Results 11 to 20 of about 261 (83)

Designing National IP/MPLS Networks with Flexgrid Optical Technology [PDF]

European Conference and Exhibition on Optical Communication, 2012
We propose a two-step procedure to design flexgrid-based national networks. Locations are first partitioned into a set of metro areas interconnected through a flexgrid optical network. The problem is modeled as a Mixed Integer Linear Programming (ILP). Next, each network is designed separately.
Velasco Esteban, Luis Domingo, Wright, Paul, Lord, Andrew, Junyent Giralt, Gabriel   +3 more
core   +5 more sources

Improving Link Spectrum Utilization in Flexgrid Optical Networks [PDF]

Journal of Optical Communications and Networking, 2015
Flexible grid optical networks are emerging as an appealing solution for future high-speed optical transport because they can provide superior flexibility and scalability and cope with the rapid growth of Internet traffic. This work introduces some simple strategies that help improve spectrum usage in flexgrid optical networks based on limiting the ...
Comellas Colomé, Jaume, Junyent Giralt, Gabriel   +1 more
openaire   +5 more sources

Optimization models for flexgrid elastic optical networks [PDF]

2013 15th International Conference on Transparent Optical Networks (ICTON), 2013
In the paper we present integer programming (IP) optimization models for flexgrid elastic optical networks (EON). We consider several different basic assumptions regarding flexibility of EON that lead to a variety of IP formulations differing in precision and complexity.
Zotkiewicz, Mateusz, Pioro, Michal, Ruiz Ramírez, Marc, Klinkowski, Miroslaw, Velasco Esteban, Luis Domingo   +4 more
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Reoptimization of Dynamic Flexgrid Optical Networks After Link Failure Repairs [PDF]

Journal of Optical Communications and Networking, 2014
In dynamic flexgrid optical networks, the usage of capacity may not be optimal due to the permanent process of setting up and tearing down connections, which, if not controlled, leads to spectrum fragmentation and, as a result, to increase of connection blocking.
Zotkiewicz, Mateusz, Ruiz Ramírez, Marc, Klinkowski, Miroslaw, Pioro, Michal, Velasco Esteban, Luis Domingo   +4 more
core   +5 more sources

Solving Large Instances of the RSA Problem in Flexgrid Elastic Optical Networks [PDF]

Journal of Optical Communications and Networking, 2016
We present an optimization procedure that mixes advanced large-scale optimization methods and heuristics to solve large instances (with over 1.7 million integer variables) of the routing and spectrum allocation (RSA) problem-a basic optimization problem in flexgrid elastic optical networks.
Miroslaw Klinkowski, Mateusz Zotkiewicz, Krzysztof Walkowiak, Michal Pióro, Marc Ruiz 0001, Luis Velasco 0001   +5 more
core   +5 more sources

Cross-stratum orchestration and flexgrid optical networks for data center federations

IEEE Network, 2013
The research leading to these results has received funding from the European Community’s Seventh Framework Pro- gramme FP7/2007-2013 under grant agreement no. 317999 IDEALIST project. Moreover, it was supported by the Span- ish science ministry through the TEC2011-27310 ELASTIC project.
Velasco Esteban, Luis Domingo, Asensio Garcia, Adrian, Castro Casales, Alberto, Berral García, Josep Lluís, Carrera Pérez, David, López, Víctor, Fernández Palacios, Juan Pedro   +6 more
openaire   +4 more sources

Single-path provisioning with multi-path recovery in flexgrid optical networks [PDF]

2012 IV International Congress on Ultra Modern Telecommunications and Control Systems, 2012
The new flexgrid technology, in opposition to the fixed grid one traditionally used in wavelength switched optical networks (WSON), allows allocating the spectral bandwidth needed to convey heterogeneous client demand bitrates in a flexible manner so that the optical spectrum can be managed much more efficiently. In this paper we propose a new recovery
Castro Casales, Alberto, Velasco Esteban, Luis Domingo, Ruiz Ramírez, Marc, Comellas Colomé, Jaume   +3 more
openaire   +3 more sources

Allocating Multi-Rate Requests to Single-Rate Lightpaths in Flexgrid Optical Networks

2018 IEEE International Conference on Communications (ICC), 2018
Some ideas about the effect of appropriately selecting the size of the connections conveyed by multi-rate flexgrid optical networks are discussed. The main focus is on illustrating the relation between spectrum consumption and effective carried traffic.
Comellas Colomé, Jaume, Junyent Giralt, Gabriel   +1 more
openaire   +3 more sources

Assessing the health of flexgrid optical networks

, 2020
This paper focuses on quantifying the efficiency of different methods used to allocate resources in flexgrid optical networks. These methods are based on a recently proposed integer linear programming formulation of the routing and spectrum assignment (RSA) problem that takes into account all possible paths and thus theoretically yields optimal ...
Chouman, Hussein, Alahdab, Luay, Colares, Rafael, Gravey, Annie, Gravey, Philippe, Kerivin, Hervé, Morvan, Michel   +6 more
openaire   +3 more sources

Elastic spectrum allocation in flexgrid optical networks [PDF]

, 2012
[CASTELLÀ] En este trabajo se presenta el estudio y los resultados obtenidos al aplicar elasticidad en redes ópticas flexibles con tecnología flexgrid. El objetivo de este trabajo es evaluar una futura vía de trabajo que ayude a resolver el problema del enrutamiento y la asignación de espectro en redes ópticas de próxima generación.
Asensio Garcia, Adrián
core   +3 more sources