Exploració per autor "Comellas Colomé, Jaume"
Ara es mostren els items 64-83 de 86
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Quantifying bypass traffic in partially meshed transparent optical networks
Comellas Colomé, Jaume; Hario, Fakhriy; Junyent Giralt, Gabriel (Springer Nature, 2023-06-28)
Article
Accés obertThis work investigates the transparent bypassing capacity requirements of elastic backbone optical networks to determine the all-optical cross-connection capacity needed at network nodes. Topological parameters have been ... -
Quantifying dynamic traffic in elastic optical networks
Comellas Colomé, Jaume; Vicario, L.; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2017)
Text en actes de congrés
Accés restringit per política de l'editorialThis work is focused on the characterization of the traffic allocated in Elastic Optical backbone networks when different dynamic traffic profiles are generated. Extensive simulations are done to statistically model the ... -
Quantitative analysis of dynamic dedicated path protection in Elastic Optical Networks
Comellas Colomé, Jaume; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés restringit per política de l'editorialA simple scheme to implement dedicated path protection in Elastic Optical Networks is proposed and evaluated under dynamic traffic conditions. It consists in splitting the spectrum available in the network links in two ... -
Quaternary optical transmission system combining phase and polarization shift keying
Comellas Colomé, Jaume; Gené Bernaus, Joan M.; Prat Gomà, Josep Joan (2004-07)
Article
Accés obertA new optical transmission scheme which combines polarization-shift keying and differential phase-shift keying on the same optical carrier is proposed. Simulations carried out show a considerable tolerance toward different ... -
Resources optimization in GMPLS-based optical multilayer networks
Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo; Spadaro, Salvatore; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (2009-06-09)
Text en actes de congrés
Accés restringit per política de l'editorial -
Scalable hybrid path computation procedure for PCE-based
Hernández Sola, Guillem; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Spadaro, Salvatore; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (2011)
Text en actes de congrés
Accés restringit per política de l'editorialIn the Hierarchical Path Computation Element (H-PCE) architecture, an optimum end-to-end path is computed using a hierarchical relationship among PCEs. An H-PCE-based path computation procedure provides low network ... -
Scalable hybrid path computation procedure for PCE-based multi-domain WSON networks
Hernández Sola, Guillem; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Spadaro, Salvatore; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (IEEE, 2011)
Text en actes de congrés
Accés restringit per política de l'editorialIn the Hierarchical Path Computation Element (H-PCE) architecture, an optimum end-to-end path is computed using a hierarchical relationship among PCEs. An H-PCE-based path computation procedure provides low network blocking ... -
Service and resource differentiation in shared-path protection environments to maximize network operator's revenues
Velasco Esteban, Luis Domingo; Ruiz Ramírez, Marc; Perelló Muntan, Jordi; Spadaro, Salvatore; Comellas Colomé, Jaume (IEEE Press. Institute of Electrical and Electronics Engineers, 2011-02)
Article
Accés obertNetwork operators are facing hard competition for opportunities in the telecommunications market, forcing network investments to be carefully evaluated before the decision-making process. A great part of core network operators’ ... -
Single-path provisioning with multi-path recovery in flexgrid optical networks
Castro Casales, Alberto; Velasco Esteban, Luis Domingo; Ruiz Ramírez, Marc; Comellas Colomé, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2012)
Text en actes de congrés
Accés restringit per política de l'editorialThe 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 ... -
Soft failure localization during commissioning testing and lightpath operation
Pérez Vela, Alba; Shariati, Mohammad Behnam; Ruiz Ramírez, Marc; Cugini, Filippo; Castro Casales, Alberto; Lu, Hongbo; Proietti, Roberto; Comellas Colomé, Jaume; Castoldi, Piero; Yoo, Sung-Joo Ben; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2017-11-09)
Article
Accés obertIn elastic optical networks (EONs), effective soft failure localization is of paramount importance to early detection of service level agreement violations while anticipating possible hard failure events. So far, failure ... -
Soft failure localization in elastic optical networks
Vela, A.P.; Shariati, Mohammad Behnam; Ruiz Ramírez, Marc; Comellas Colomé, Jaume; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2018)
Text en actes de congrés
Accés restringit per política de l'editorialSoft failure localization to early detect service level agreement violations is of paramount importance in elastic optical networks (EONs), while it allows anticipating possible hard failure events. Nowadays, effective and ... -
Some open issues in multi-domain/multi-operator/multi-granular ASON/GMPLS networks
Spadaro, Salvatore; Velasco Esteban, Luis Domingo; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (IEEE, 2009-07-31)
Text en actes de congrés
Accés obertLarge optical backbone networks may be composed of several domains, each one controlled by different administrators/operators. Besides, the bandwidth granularity of these domains may be different. Label Switched Paths ... -
Spatial partitioning for proactive spectrum fragmentation avoidance in flex-grid/SDM dynamic optical core networks
Comellas Colomé, Jaume; Perelló Muntan, Jordi; Solé Pareta, Josep; Junyent Giralt, Gabriel (2020-10)
Article
Accés obertSpectrum fragmentation has always been a major issue to overcome toward spectrally efficient Flex-Grid over Single-Mode Fiber dynamic optical networks and continues like so when evolving to Flex-Grid over Spatial Division ... -
Spectrally and spatially flexible optical networks: recent developments and findings
Shariati, Mohammad Behnam; Klonidis, Dimitrios; Marom, Dan M.; Comellas Colomé, Jaume; Velasco Esteban, Luis Domingo; Tomkos, Ioannis (Institute of Electrical and Electronics Engineers (IEEE), 2018-09-27)
Text en actes de congrés
Accés restringit per política de l'editorialSpace division multiplexing (SDM) has been proposed as the ultimate solution to address the capacity crunch of optical transport networks. The efficient utilization of SDM requires some forms of spatial integration which ... -
SSMS: A split step multiband simulation software
Khare, Prasunika; Costa, Nelson; Pedro, João; Napoli, Antonio; Arpanaei, Farhad; Comellas Colomé, Jaume; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2023)
Text en actes de congrés
Accés obertWe introduce SSMS, a multiband optical fiber simulator entirely developed in MATLAB. SSMS solves the generalized nonlinear Schrödinger equation relying on the 4 th order Runge-Kutta method in Interaction Picture (RK4IP) ... -
Supporting heterogenous traffic on top of point-to-multipoint light-trees †
Iqbal, Masab; Velasco Esteban, Luis Domingo; Ruiz Ramírez, Marc; Costa, Nelson; Napoli, Antonio; Pedro, João; Comellas Colomé, Jaume (2023-02-23)
Article
Accés obertNew 5 G and beyond services demand innovative solutions in optical transport to increase efficiency and flexibility and reduce capital (CAPEX) and operational (OPEX) expenditures to support heterogeneous and dynamic traffic. ... -
Técnicas para minimizar la degradación provocada por la polarización en las comunicaciones por fibra óptica
Comellas Colomé, Jaume (Universitat Politècnica de Catalunya, 1999-07-16)
Tesi
Accés obertEn els últims anys la importància de la polarització en les comunicacions òptiques ha crescut notablement com resultat de tres grans desenvolupaments:<br/>1. L'aparició de l'amplificació òptica ha fet que es produeixi un ... -
Three years of an intensive programme: experiences, observations and learning points
Myrup Pedersen, Jens; Gutiérrez López, José Manuel; Kirikova, Marite; Zabludowski, Lukasz; Comellas Colomé, Jaume (Aalborg University Press, 2015)
Text en actes de congrés
Accés obertThis paper summarizes valuable experiences and learning points from three years of the Erasmus funded Intensive Programme on “Implementing Europe’s Future Broadband Infrastructure”. The programme consisted of a course held ... -
Using dual-path allocation for partial traffic protection in elastic optical networks
Junyent Giralt, Gabriel; Comellas Colomé, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2017)
Text en actes de congrés
Accés restringit per política de l'editorialMulti-path allocation has been proposed as a simple way to achieve traffic protection in different networking domains. In this work dual-path allocation is proposed for Elastic Optical Networks (EON) assuming dynamic offered ... -
Using spatial division multiplexing to avoid fragmentation in flex-grid optical networks
Comellas Colomé, Jaume; Perelló Muntan, Jordi; Solé Pareta, Josep; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2020)
Text en actes de congrés
Accés obertSpectrum fragmentation is one of the main drawbacks of Flex-Grid Optical Networks, and it becomes especially harmful under dynamic traffic conditions. When evolving from single fibre networks to spatial division multiplexed ...