Exploració per tema "Comunicacions òptiques"

Ara es mostren els items 1-20 de 592

  • 1Gbps full-duplex links for ultra-dense-WDM 6.25GHz frequency slots in optical metro-access networks 

    Altabas, Jose Antonio; Izquierdo, David; Lázaro Villa, José Antonio; Lerin, Adolfo; Sotelo, Félix; Garces, Ignacio (2016-01-11)
    Article
    Accés obert
    1Gbps full-duplex optical links for 6.25GHz ultra dense WDM frequency slots are demonstrated and optimized for cost-effective metro-access networks. The OLT-ONU downlinks are based on 1Gbps Nyquist-DPSK using MZM and ...

  • 1Gb/s service planning on standard PON technologies 

    Larrabeiti, David; Sánchez, Rafael; Hernández, José A. (2017-06)
    Audiovisual
    Accés obert
    Tutorial impartit dins del marc del 2nd International Workshop on Elastic Networks Design and Optimisation (ELASTICNETS 2017).

  • 5G transport network blueprint and dimensioning for a dense urban scenario 

    Seyfettin Demirkol, Ilker; Camps Mur, Daniel; Bartelt, Jens; Zou, Jim (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this paper, we provide a quantitative evaluation of the deployment aspects and dimensioning of the 5G transport architecture in a representative European city. In particular, we select an example dense urban city scenario ...

  • 7.5 Gb/s direct DFB phase modulation with 8-DPSK for 6.25 GHz spaced coherent UDWDM-PONs 

    Cano Valadez, Iván Nicolás; Velásquez Micolta, Juan Camilo; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    We demonstrate an 8-DPSK directly phase-modulated DFB with intradyne detection in a 50 km, 6.25 GHz channel spaced UDWDM-PON. A bit rate of 7.5 Gb/s is achieved with Rx sensitivity of -31 dBm at BER=10-3.

  • ABNO-driven content distribution in the telecom cloud 

    Gifre Renom, Lluís; Tornatore, Massimo; Contreras Murillo, Luis Miguel; Mukherjee, Biswanath; Velasco Esteban, Luis Domingo (2017-11-01)
    Article
    Accés obert
    As current traffic growth is expected to strain capacity of today¿s metro network, novel content distribution architectures where contents are placed closer to the users are being investigated. In that regard, telecom ...

  • A case of acquisition, transmission and use of information to control a manufacturing process 

    Fernández Román, Laura (Universitat Politècnica de Catalunya, 2009-10-08)
    Projecte Final de Màster Oficial
    Accés obert

  • Access services availability and traffic forecast in PON deployment 

    Segarra Mullerat, Josep; Sales Zaragoza, Vicente; Prat Gomà, Josep Joan (IEEE, 2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this paper, offered and new broadband services for residential customers are considered in Passive Optical Networks (PONs). The user bit rates together with QoS requirements are evaluated for the availability of ...

  • Achievable data rate of coordinated multi-point transmission for visible light communications 

    Dowhuszko, Alexis; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper studies the sum data rate that a Visible Light Communication (VLC) system with multiple users canachieve when phosphor-converted white LED panels are usedto provide illumination and communication simultaneously. ...

  • Achieving energy efficiency: an energy-aware approach in SDN 

    Fernández Fernández, Adriana; Cervelló Pastor, Cristina; Ochoa Aday, Leonardo (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Achieving energy efficiency has recently become an essential aim of networking research due to the ever increasing power consumption and CO2 emissions generated by large data networks. For this problem, the emerging paradigm ...

  • A Comparison of Nonlinear Media for All-Optical Signal Processing 

    Martínez Díaz, Jordi (Universitat Politècnica de Catalunya / Technical University of Denmark. Fotonik Department / Politecnico di Torino. Dipartimento di elettronica, 2013-07-31)
    Projecte/Treball Final de Carrera
    Accés obert
    [ANGLÈS] This thesis is focused on benchmarking different nonlinear media that are currently used for all-optical signal processing. The materials survey has been based on both low linear losses and highly nonlinear ...

  • Active PCE demonstration performing elastic operations and hitless defragmentation in flexible grid optical networks 

    Paolucci, Francesco; Castro Casales, Alberto; Fresi, Francesco; Imran, Muhammad; Giorgetti, Alessio; Bhownik, Bishanka Brata; Berrettini, Gianluca; Meloni, Gianluca; Cugini, Filippo; Velasco Esteban, Luis Domingo; Poti, Luca; Castoldi, Piero (2015-02-01)
    Article
    Accés restringit per política de l'editorial

  • Adaptive burst admission and forwarding in OBS networks 

    Rumley, Sébastien; Pedrola Escribà, Òscar; Klinkowski, Miroslaw; Pedroso, Pedro; Gaumier, Christian; Careglio, Davide; Solé Pareta, Josep (IEEE, 2009-07-31)
    Text en actes de congrés
    Accés obert
    This paper addresses the problem of controlling the performance of optical burst switching (OBS) networks in presence of non-stationary traffic demands. We propose a joint burst admission control and forwarding mechanism ...

  • Advanced Methods for the Measurement of Chromatic Dispersion at Optical Frequencies 

    Sarabia Díaz, Eugenia Teresa (Universitat Politècnica de Catalunya, 2015-02-16)
    Projecte Final de Màster Oficial
    Accés obert
    Currently, most networks are hybrid, combining fiber with copper wire, but the goal is for them to be completely of fiber. Like any other transmission medium, using fiber has some drawbacks, being chromatic dispersion one ...

  • Advanced techniques for optical access networks based on OFDM 

    Arcas Serrate, Blanca (Universitat Politècnica de Catalunya, 2012-10-05)
    Projecte Final de Màster Oficial
    Accés obert
    This Master Thesis aims to review and study the different alternatives for application of OFDM technologies to optical fibre networks and assess their potential as the basis of the next generation PON. New proposals based ...

  • Advances in wireless community networks with the community-lab testbed 

    Navarro Moldes, Leandro; Baig Viñas, Roger; Barz, Christoph; Bonicioli, Joseph; Braem, Bart; Freitag, Fèlix; Vilalta i Balaguer, Ivan (2016-07)
    Article
    Accés obert
    Beyond traditional telecom providers, citizens and organizations pool their own resources and coordinate in order to build local network infrastructures to address the digital divide in many parts of the world. These ...

  • A feedback-based hybrid OBS/OCS architecture with fast-over-slow capability 

    Khodashenas, Pooria Saiyad; Perelló Muntan, Jordi; Spadaro, Salvatore; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (2011)
    Comunicació de congrés
    Accés obert
    Dynamic bandwidth allocation in response to the bandwidth requirements of new emerging applications is an essential demand for future optical networks. Hybrid switching architectures combining the benefits of different ...

  • Agile reconfigurable and traffic adapted all-optical access-metro networks 

    Segarra Mullerat, Josep; Sales Zaragoza, Vicente; Prat Gomà, Josep Joan (2009)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The emerging high bandwidth and on-demand user applications require improvements in capacity, configurability and resiliency in next generation optical access networks to incrementally expand on the basis of customers ...

  • A GMPLS/OBS network architecture enabling QoS-aware end-to-end burst transport 

    Pedroso, Pedro; Perelló Muntan, Jordi; Spadaro, Salvatore; Careglio, Davide; Solé Pareta, Josep; Klinkowski, Miroslaw (2010-07-01)
    Report de recerca
    Accés obert
    This paper introduces a Generalized Multi-Protocol Label Switching (GMPLS)-enabled Optical Burst Switched (OBS) network architecture featuring end-to-end QoS-aware burst transport services. This is achieved by setting up ...

  • Algebraic bright and vortex solitons in defocusing media 

    Borovkova, Olga V.; Kartashov, Yaroslav V.; Malomed, Boris A.; Torner Sabata, Lluís (2011-08-15)
    Article
    Accés restringit per política de l'editorial
    We demonstrate that spatially inhomogeneous defocusing nonlinear landscapes with the nonlinearity coefficient growing toward the periphery as (1+|¿|¿) support one- and two-dimensional fundamental and higher-order bright ...

  • All-fiber mach-zehnder interferometer for dwdm-pon bidirectional multiplexing 

    Kurysheva, Anna (Universitat Politècnica de Catalunya, 2015-07)
    Projecte Final de Màster Oficial
    Accés obert
    Next generation optical access networks (FTTH, Fiber-to-the-Home), use wavelength division multiplexing (WDM) to highly increase the communication capacity to/from the users. A key issue in these networks is to split/combine ...