Browsing by Subject "Comunicacions òptiques"

Now showing items 1-20 of 637

  • 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
    Open Access
    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
    Open Access
    Tutorial impartit dins del marc del 2nd International Workshop on Elastic Networks Design and Optimisation (ELASTICNETS 2017).

  • 25Gbps quasicoherent receiver for beyond NG-PON2 access networks 

    Altabas, Jose Antonio; Suhr, Lau F.; Silva Valdecasa, Guillermo; Lázaro Villa, José Antonio; Garces, Ignacio; Jensen, J.B.; Clausen, Anders T. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Restricted access - publisher's policy
    A 25Gbps quasicoherent receiver with simple DSP has been experimentally validated for 25G access networks. It exhibits a sensitivity of -24. 7dBm after 20km SSMF and duobinary decoding and provides a power budget of 25. 7dB.

  • 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)
    Conference report
    Restricted access - publisher's policy
    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)
    Conference report
    Restricted access - publisher's policy
    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
    Open Access
    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)
    Master thesis
    Open Access

  • Access services availability and traffic forecast in PON deployment 

    Segarra Mullerat, Josep; Sales Zaragozá, Vicente; Prat Gomà, Josep Joan (IEEE, 2011)
    Conference report
    Restricted access - publisher's policy
    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)
    Conference report
    Restricted access - publisher's policy
    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)
    Conference report
    Restricted access - publisher's policy
    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)
    Master thesis (pre-Bologna period)
    Open Access
    Covenantee:  Politecnico di Torino
    [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 ...

  • A control and management architecture supporting autonomic NFV services 

    Velasco Esteban, Luis Domingo; Casellas Regi, Ramón; Llana, Sergio; Gifré Renom, Lluís; Martínez Rivera, Ricardo Victor; Vilata, Ricard; Muñoz González, Raul; Ruiz, Marc (2019-02)
    Article
    Restricted access - publisher's policy
    The proposed control, orchestration and management (COM) architecture is presented from a high-level point of view; it enables the dynamic provisioning of services such as network data connectivity or generic network slicing ...

  • 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
    Restricted access - publisher's policy

  • 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)
    Conference report
    Open Access
    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)
    Master thesis
    Open Access
    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)
    Master thesis
    Open Access
    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
    Open Access
    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 ...

  • Advances on path computation element 

    González de Dios, Oscar; Masip Bruin, Xavier; Lee, Young (2017-11-01)
    Article
    Open Access

  • 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)
    Conference lecture
    Open Access
    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 ...

  • A fully SDN enabled all-optical architecture for data centre virtualisation with time and space multiplexing 

    Kondepu, K; Jackson, Chirs; Ou, Y; Pagès Cruz, Albert; Agraz Bujan, Fernando; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2018-07-01)
    Article
    Open Access
    Virtual Data Centre (VDC) solutions provide an environment that is able to quickly scale-up and where virtual machines and network resources can be quickly added on-demand through self-service procedures. VDC providers ...