Now showing items 21-40 of 230

    • 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 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 ...
    • Application on minimizing residual AM in DPSK UDWDM-PON ONU by integrated dual-EML 

      Chu Guang, Yong; Cano Valadéz, Iván Nicolás; Polo Querol, Víctor; Prat, Josep (2016-06-01)
      Article
      Open Access
      A monolithically integrated dual electroabsorption modulated laser (DEML), consisting of distributed feedback laser (DFB) and electroabsorption modulator (EAM) sections, is proposed as a transmitter in an optical network ...
    • Applying cognitive dynamic learning strategies for margins reduction in operational optical networks 

      Notivol Calleja, Luis David; Spadaro, Salvatore; Perelló Muntan, Jordi; Junyent Giralt, Gabriel (2020-09-01)
      Article
      Restricted access - publisher's policy
      Today's optical transport networks are complex already and the support of the new arising services will further increase such complexity. Traditional deterministic network procedures will need to be revisited, especially ...
    • Applying data visualization for failure localization 

      Vela, Alba P.; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      Data visualization is applied to BER measures in a bigdata repository. Bubble charts are produced to identify lightpaths with increasing BER and spectrum color maps are then used to identify the most likely degraded link
    • Autonomic NFV network services on top of disaggregated optical metro networks 

      Esmenats, P. R.; Casellas Regi, Ramon; Gifre Renom, Lluís; Pérez Vela, Alba; Ruiz Ramírez, Marc; Martínez, Ricardo; Velasco Esteban, Luis Domingo (2019)
      Conference report
      Restricted access - publisher's policy
      Control and orchestration of metro network to support dynamic provisioning and reconfiguration of services based on Virtual Network Functions are demonstrated through a CDN example. Interaction among CASTOR MDA, OSM and ...
    • Bandwidth assignment criteria against rayleigh backscattering effect in TDM-PON single-fibre wavelength-reuse networks 

      López Pastor, Eduardo Tommy; Lázaro Villa, José Antonio; Polo Querol, Víctor; Prat Gomà, Josep Joan (IEEE, 2011)
      Conference report
      Restricted access - publisher's policy
      In this paper, theoretical and numerical analysis for Rayleigh Backscattering (RB) in TDM-PON full-duplex single-fiber bidirectional transmission with burst mode upstream and reflective ONU are presented. The results show ...
    • Big data analytics in support of virtual network topology adaptability 

      Gifre Renom, Lluís; Contreras, Luis Miguel; Lopez Alvarez, Victor; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      ABNO's OAM Handler is extended with big data analytics capabilities to anticipate traffic changes in volume and direction. Predicted traffic is used as input for VNT re-optimization. Experimental assessment is realized on ...
    • Building autonomic optical whitebox-based networks 

      Velasco Esteban, Luis Domingo; Sgambelluri, Andrea; Casellas Regi, Ramón; Gifre Renom, Lluís; Izquierdo Zaragoza, José Luis; Fresi, Francesco; Paolucci, Francesco; Martínez Rivera, Ricardo Victor; Riccardi, Emilio (Institute of Electrical and Electronics Engineers (IEEE), 2018-08-01)
      Article
      Open Access
      Disaggregation at the optical layer is expected to bring benefits to network operators by enriching the offering of available solutions and enabling the deployment of optical nodes that better fit their needs. In this ...
    • C plus L band extended reach amplified next generation access networks 

      Andre, P. S; Teixeira, A.L.J.; Girão, J.P.; Neto, B.; Rocha, A.M.; Reis, Catarina; Dionisio, R.P; Chatzi, Sotiria; Bonada Bo, Francesc; Lázaro Villa, José Antonio (2011-07-20)
      Article
      Restricted access - publisher's policy
      The feasibility of optical amplification solutions for extended reach next generation access networks in C + L bands is studied. Amplification schemes based on Raman fiber amplifier and their combination with remotely ...
    • Cancelación del ruido AM en sistemas de transmisión coherentes por fibra óptica: receptor balanceado 

      Ruiz Boqué, Sílvia; Junyent Giralt, Gabriel (Institución ferial de Madrid (IFEMA), 1988)
      Conference report
      Open Access
      In this work the authors have studied the AM noise influence over coherent transmission systems employing heterodyne-type detection. A dual-detector optical heterodyne receiver is also studied in arder to eliminate the LO ...
    • Capacity quantification of joint-switching-enabled flex- grid/SDM optical backbone networks 

      Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Spadaro, Salvatore (Optical Society of American (OSA), 2017)
      Conference report
      Open Access
      We quantify the network capacity scaling from 7 to 30 spatial channels. While multifiber provides a 5x capacity increase, MCF limits it to 4x and 2x in national and continental backbone networks, respectively.
    • Caracterización estadística del amplificador óptico semiconductor aplicado en un enlace digital por fibra óptica 

      Ruiz Moreno, Sergio; Junyent Giralt, Gabriel (Consejo Superior de Investigaciones Científicas (CSIC), 1986)
      Conference report
      Open Access
      In this paper an statistical model for the semiconductor optical amplifier CSLA) working in linear regime is developped. This model, based on the STT theory, allows the calculation of any number of moments of the statistical ...
    • Colorless FDMA-PON with flexible bandwidth allocation and colorless, low-speed ONUs [invited] 

      Schindler, Philipp C.; Schmogrow, Rene M.; Dreschmann, Michael; Meyer, Joachim; Tomkos, Ioannis; Prat Gomà, Josep Joan; Krimmel, Heinz-Georg; Pfeiffer, Thomas; Kourtessis, Pandelis; Ludwig, A.; Karnick, D.; Hillerkuss, David; Becker, Juergen; Koos, Christian; Freude, Wolfgang; Leuthold, Juerg (Institute of Electrical and Electronics Engineers (IEEE), 2013-10)
      Article
      Restricted access - publisher's policy
      We demonstrate a remotely seeded flexible passive optical network (PON) with multiple low-speed subscribers but only a single optical line terminal transceiver operating at a data rate of 31.25 Gbits/s. The scheme is based ...
    • Concepción, simulación y optimización de dispositivos desplazadores de longitud de onda reflexivos para redes de acceso por fibra óptica (FTTH) 

      Parra Figarella, Mario Simón (Universitat Politècnica de Catalunya, 2013-03-01)
      Master thesis (pre-Bologna period)
      120 months embargo
      [ANGLÊS] This project presents the design, simulation and optimization of reflective wavelength shifters circuits, with the idea of being implemented in the ONU of subscribers within a passive fiber access network (FTTH). ...
    • Control de la polarització de la llum en una xarxa WDM-PON 

      Blanco Benítez, Juan (Universitat Politècnica de Catalunya, 2015-07)
      Master thesis (pre-Bologna period)
      Open Access
      Study of control and compensation of the distorion in polarization, introduced by the birefringence of a fiber in a WDM-PON net.
    • Core VNT adaptation based on the aggregated metro-flow traffic model prediction 

      Morales Alcaide, Fernando; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Optical Society of American (OSA), 2017)
      Conference report
      Restricted access - publisher's policy
      Aggregation of metro-flow traffic models is proposed to obtain valid core traffic predictive models for core VNT reconfiguration when metro and core networks are independently controlled. Exhaustive simulation results ...
    • Damage detection in composite materials structures under variable loads conditions by using fiber Bragg gratings and principal component analysis, involving new unfolding and scaling methods 

      Sierra Pérez, Julian; Güemes Gordo, Alfredo; Mujica Delgado, Luis Eduardo; Ruiz Ordóñez, Magda (2014-06-03)
      Article
      Restricted access - publisher's policy
      An innovative methodology based on the use of fiber Bragg gratings as strain sensors and strain field pattern recognition is proposed for damage detection in composite materials structures. The strain field pattern recognition ...
    • Demonstration and field trial of a resilient hybrid NG-PON test-bed 

      Prat Gomà, Josep Joan; Polo Querol, Víctor; Schrenk, Bernhard; Lázaro Villa, José Antonio; Bonada Bo, Francesc; López Pastor, Eduardo Tommy; Omella, M.; Saliou, Fabienne; Trung Le, Quang; Chanclou, Philippe; Leino, D.; Soila, Risto; Spirou, S.; Costa, Liliana; Teixeira, A.; Tosi-Beleffi, G.M.; Klonidis, Dimitrios; Tomkos, Ioannis (2014-10-01)
      Article
      Restricted access - publisher's policy
      A multi-layer next generation PON prototype has been built and tested, to show the feasibility of extended hybrid DWDM/TDM-XGPON FTTH networks with resilient optically-integrated ring-trees architecture, supporting broadband ...
    • Demonstration of a remotely dual-pumped long-reach PON for flexible deployment 

      Chanclou, Philippe; Schrenk, Bernhard; Lázaro Villa, José Antonio; Klonidis, Dimitrios; Bonada Bo, Francesc; Saliou, Fabienne; Polo Querol, Víctor; López Pastor, Eduardo Tommy; Le, Q.T.; Brenot, Romain; de Valicourt, Guilhem; Spirou, S.; Soila, Risto; Leino, D.; Tosi Beleffi, Giorgio M.; Tomkos, Ioannis; Chatzi, Sotiria; Teixeira, A.; Costa, L.; Kazmierski, Christophe; Prats, Jordi (2012-04-01)
      Article
      Restricted access - publisher's policy
      We propose and experimentally demonstrate a flexible wavelength division multiplexing/time division multiplexing network architecture for converged metro-access environment. Entire passiveness in the fiber plant is ...