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Survivable IP/MPLS-Over-WSON multilayer network optimization
Ruiz Ramírez, Marc; Pedrola Escribà, Òscar; Velasco Esteban, Luis Domingo; Careglio, Davide; Fernández Palacios, Juan Pedro; Junyent Giralt, Gabriel
Universitat Politècnica de Catalunya. Departament d'Arquitectura de Computadors; Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. CBA - Sistemes de Comunicacions de Banda Ampla; Universitat Politècnica de Catalunya. GCO - Grup de Comunicacions Òptiques
Network operators are facing the problem of dimensioning their networks for the expected huge IP traffic volumes while keeping constant or even reducing the connectivity prices. Therefore, new architectural solutions able to cope with the expected traffic increase in a more cost-effective way are needed. In this work, we study the survivable IP/multi-protocol label switching (MPLS) over wavelength switched optical network (WSON) multilayer network problem as a capital expenditure (CAPEX) minimization problem. Two network approaches providing survivability against optical links, IP/MPLS nodes, and opto-electronic port failures are compared: the classical overlay approach where two redundant IP/MPLS networks are deployed, and the new joint multilayer approach which provides the requested survivability through an orchestrated interlayer recovery scheme which minimizes the over-dimensioning of IP/MPLS nodes. Mathematical programming models are developed for both approaches. Solving these models, however, becomes impractical for realistic networks. In view of this, evolutionary heuristics based on the biased random-key genetic algorithm framework are also proposed. Exhaustive experiments on several reference network scenarios illustrate the effectiveness of the proposed approach in minimizing network CAPEX.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria electrònica i telecomunicacions::Telecomunicació òptica
Integer linear programming
Multilayer planning
Survivable multilayer networks
Optical burst switching
Comunicacions òptiques
info:eu-repo/semantics/publishedVersion
Artículo
Optical Society of America
         

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