Now showing items 1-20 of 205

    • 1.3 µm SDN-enabled optical packet switch architecture for high performance and programmable data center network 

      Miao, Wang; Agraz Bujan, Fernando; De Waardt, Huug D.; Spadaro, Salvatore; Sebastian Dorren, Harm Joseph; Calabretta, Nicola (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Restricted access - publisher's policy
      We demonstrate a 1.3 µm port-count scalable SDN-enabled optical packet switch architecture for programmable data-center networks. Experimental assessments of a 40Gb/s 4×4 switch system with SDN-control show <10-5 packet-loss ...
    • 15-dB differential link-loss UDWDM-PON with direct beat phase modulated DFBs 

      Velásquez Micolta, Juan Camilo; Cano Valadez, Iván Nicolás; Polo Querol, Víctor; Domingo Ribé, Marc; Prat Gomà, Josep Joan (2017-11-21)
      Article
      Open Access
      IEEE A 15 dB differential link-loss ultra-dense wavelength division multiplexing passive optical network (UDWDM-PON) with two optical network units (ONU) spectrally spaced 6.25 GHz is experimentally implemented and tested. ...
    • 5G connected vehicles supported by optical fiber access 

      Lázaro Villa, José Antonio; Coves Garrido, Massiel; Sarmiento Hernández, Samael; Altabas, Jose Antonio; Lerin, Adolfo (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      Future autonomous vehicle will require a high level of computation, communication, sensing and fast response actuation. Communication among vehicles, and vehicles to infrastructure, accessing to remote systems and services ...
    • A column generation approach for large-scale RSA-based network planning 

      Ruiz Ramírez, Marc; Zotkiewicz, Mateusz; Velasco Esteban, Luis Domingo; Comellas Colomé, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      In flexgrid-based optical networks, the problem of finding optimal route and spectrum allocation (RSA) for the demands in a traffic matrix becomes harder to solve than similar problems in fixed DWDM networks, mainly due ...
    • A frequency approach on MIMO DSP for optical communication systems 

      Palou Garcia, Xavier (Universitat Politècnica de Catalunya, 2013-02-28)
      Master thesis (pre-Bologna period)
      120 months embargo
      [ANGLÈS] Spatial Division Multiplexing (SDM) has arisen during the last years as the most promising technique to overcome the increasing necessity of capacity of the communication systems while avoiding the theoretical ...
    • A multi-tenancy model based on resource capabilities and ownership for infrastructure management 

      Garcia Espin, Joan Antoni; Ferrer Riera, Jordi; Figuerola Fernández, Sergi; López Berga, Ester (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Conference report
      Restricted access - publisher's policy
      This paper presents a multi-tenancy model based on infrastructure resource capability virtualisation. The model, namely Resources, Ownership, Roles and Actors or RORA, approaches network and IT infrastructure virtualisation ...
    • A novel distributed fiber-optic strain sensor 

      García Hernández, Miguel J.; Ortega Redondo, Juan Antonio; Chávez Domínguez, Juan Antonio; Salazar Soler, Jorge; Turó Peroy, Antonio (2002-08)
      Article
      Restricted access - publisher's policy
      The theory of operation of a fiber-optic-based strain sensor system, suitable for long structures, is described. The proposed sensor design is composed of several hundreds of sections separated by reflectors in order to ...
    • A simple strategy to improve spectrum use in multi-rate flexgrid optical networks 

      Comellas Colomé, Jaume; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      A simple overprovisioning Spectrum Assignment strategy for flexgrid networks is demonstrated as efficient in terms of network throughput at a given blocking probability. Gain is obtained despite allocated spectrum exceeds ...
    • A traffic intensity model for flexgrid optical network planning under dynamic traffic operation 

      Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      We obtain a model to estimate the highest traffic intensity that a flexgrid-based network can support in dynamic scenarios. A design problem is introduced to illustrate its application. Numerical results validate both ...
    • Acotación de la probabilidad de error en un sistema de transmisión digital por fibra óptica 

      Agustí Comes, Ramon; Junyent Giralt, Gabriel (1980)
      Conference report
      Open Access
      Dans ce papier, on a obtenu des bornes inférieure et supérieure de la probabilité d 'erreur par symbole dans un systemè de transmission numérique par Fibre Optique. Pour celà, nous avons employé une simplification de la ...
    • Acotación rápida de la probabilidad de error en un sistema de transmisión digital por fibra óptica con símbolos no correlados 

      Junyent Giralt, Gabriel; Casadevall Palacio, Fernando José (Unión Científica Internacional de Radio (URSI), 1983)
      Conference report
      Open Access
      This paper deals with the problem of determinig an upper bound on the average conditional error probabilities in a digital optical fiber communication system with non-correlated symbols, in the presence of additive noise ...
    • Adaptation of the application QUALIFO to communicate with the Photon Kinetics 8000 OTDR 

      Hidalgo Castro, Alberto; Manuel Lázaro, Antonio (2010-12-01)
      Article
      Open Access
      In this paper we present the adaptation of QUALIFO, a software designed to assure and control the quality of optic fiber cables, to a new OTDR model, concretely the Photon Kinetics 8000. While the communication with the ...
    • Adaptive loading algorithms for optical OFDM transmission systems 

      Toporcer Korec, Norman (Universitat Politècnica de Catalunya, 2011-07-20)
      Bachelor thesis
      Open Access
    • After failure repair optimization in dynamic flexgrid optical networks 

      Ruiz Ramírez, Marc; Zotkiewicz, Mateusz; Castro Casales, Alberto; Klinkowski, Miroslaw; Velasco Esteban, Luis Domingo; Pioro, Michal (The Optical Society (OSA), 2014)
      Conference report
      Restricted access - publisher's policy
      We introduce the problem of reoptimizing the network after a link failure has been repaired as an effective way for reducing capacity usage and improving network performance. Numerical results show gains higher than 42%.
    • Allocating multi-rate requests to single-rate lightpaths in Flexgrid optical networks 

      Comellas Colomé, Jaume; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      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 ...
    • Analysis of back-propagation and RF pilot-tone based nonlinearity compensation for a 9x224Gb/s POLMUX-16QAM system 

      Díaz Souto, Alberto; Napoli, Antonio; Adhikari, Susmita; Maalej, Zied; Lobato Polo, Adriana P.; Kuschnerov, Maxim; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Conference report
      Restricted access - publisher's policy
      We investigate the joint implementation of back-propagation and RF-pilot tone for fiber nonlinear compensation in POLMUX-16QAM and show that the nonlinear tolerance is drastically improved when compared to OFDM system
    • Analysis of the spectrum occupancy in elastic optical network 

      Caba Oriola, Joel (Universitat Politècnica de Catalunya, 2017-06)
      Bachelor thesis
      Open Access
      Elastic Optical Networks were proposed in response to the large capacity and diverse traffic granularity of the future Internet. Depending on the bandwidth requirements, EONs allocate an appropriate-sized spectrum to each ...
    • Anàlisi de redundància dels nodes d'una xarxa 

      Gomariz Gimena, Gerard (Universitat Politècnica de Catalunya, 2017-01)
      Bachelor thesis
      Restricted access - author's decision
      Covenantee:   Xarxa Oberta de Catalunya
      The main goal of this project is to provide redundancy to the nodes of a Network, in this case the Network is owned by Xarxa Oberta de Catalunya. Different aspects will be analyzed with the goal to determine if that node ...
    • Análisis de sistemas de predistorsión para moduladores electroópticos Mach-Zehnder usando el simulador Virtual Photonics Inc. (VPI) 

      Jordà Carmona, Albert (Universitat Politècnica de Catalunya, 2010-02-25)
      Bachelor thesis
      Open Access
    • Análisis del despliegue territorial de la fibra óptica en Catalunya 

      Aranda Bodelón, Eva (Universitat Politècnica de Catalunya, 2013-05-29)
      Bachelor thesis
      Restricted access - confidentiality agreement
      La fibra óptica permite la transmisión de datos mediante la luz que viaja por un medio plástico.Existen diferentes tipologías de fibras ópticas, como monomodo (la señal se propaga en un solomodo) o mutimodo (se propaga en ...