Enviaments recents

  • Learning from the optical spectrum: failure detection and identification [Invited] 

    Behnam Shariati, Mohammad; Ruiz Ramírez, Marc; Comellas Colomé, Jaume; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2018-07-23)
    Article
    Accés obert
    The availability of coarse-resolution cost-effective Optical Spectrum Analyzers (OSA) allows its widespread deployment in operators’ networks. In this paper, we explore several machine learning approaches for soft-failure ...
  • Machine learning for network automation: Overview, architecture, and applications [invited tutorial] 

    Rafique, Danish; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Article
    Accés obert
    Networks are complex interacting systems involving cloud operations, core and metro transport, and mobile connectivity all the way to video streaming and similar user applications. With localized and highly engineered ...
  • Real-time 10Gbps polarization independent quasicoherent receiver for NG-PON2 access networks 

    Altabas, Jose Antonio; Silva Valdecasa, Guillermo; Suhr, Lau F.; Lázaro Villa, José Antonio; Garces, Ignacio; Tafur Monroy, Idelfonso; Jensen, J.B. (Institute of Electrical and Electronics Engineers (IEEE), 2018-11-09)
    Article
    Accés obert
    In this paper, we propose and test experimentally a real-time 10 Gbps polarization independent quasicoherent receiver for NG-PON2 access networks. The proposed 10 Gbps quasicoherent receiver exhibits a sensitivity of -35.2 ...
  • SDN-based parallel link discovery in optical transport networks 

    Montero Herrera, Rafael; Agraz Bujan, Fernando; Pagès Cruz, Albert; Perelló Muntan, Jordi; Spadaro, Salvatore (Wiley-Blackwell, 2018-01-01)
    Article
    Accés obert
    The use of optical technologies in modern network scenarios has increased in the last decade, mostly due to their support in crucial networking topics (ie, bandwidth and scalability). In parallel, these scenarios have also ...
  • Simplified carrier recovery for intradyne optical PSK receivers in udWDM-PON 

    Tabares Giraldo, Jeison; Ghasemi, Saeed; Polo Querol, Víctor; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2018-04-28)
    Article
    Accés obert
    We present an optimized carrier recovery architecture based on differential detection for coherent optical receivers that substantially reduces the required DSP hardware resources, aimed at cost-effective transceivers for ...
  • CURSA-SQ: a methodology for service-centric traffic flow analysis 

    Ruiz Ramírez, Marc; Coltraro Ianniello, Franco; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2018-09-01)
    Article
    Accés obert
    The rapid availability of new services means that network operators cannot exhaustively test their impact on the network or anticipate any capacity exhaustion. This situation will be worse with the imminent introduction ...
  • Cost-effective ROADM design to maximize the traffic load capacity of u-DWDM coherent metro-access networks 

    Spadaro, Salvatore; Sarmiento Hernández, Samael; Lázaro Villa, José Antonio (2018-11-01)
    Article
    Accés restringit per política de l'editorial
    The current constant growing in traffic demands caused by the popularization of cloud services, mobile and social networks is requiring architectural changes at the underlying networks so as to provide a more highly dynamic ...
  • 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
    Accés obert
    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 ...
  • 1.25–2.5 Gb/s simple nyquist transmitters for coherent UDWDM-PON with enhanced spectral efficiency 

    Velásquez Micolta, Juan Camilo; Tabares Giraldo, Jeison; Cano Valadez, Iván Nicolás; Prat Gomà, Josep Joan (2018-04-19)
    Article
    Accés obert
    We present a coherent ultra-dense wavelength division multiplexing passive optical network (UDWDM-PON) with enhanced spectral efficiency. The benefit of using Gaussian or Nyquist pulse-shaping filters at the transmitter ...
  • On the scalability of dynamic Flex-Grid/SDM optical core networks 

    Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Gene Bernaus, Joan M.; Spadaro, Salvatore (2018-09-04)
    Article
    Accés restringit per política de l'editorial
    Future optical core networks realizing Flex-Grid and Space Division Multiplexing (Flex-Grid/SDM) will be key to effectively cope with the rapid growth of the Internet traffic, thanks to their superior capacity and spectrum ...
  • Route, modulation format, MIMO and spectrum assignment in Flex-Grid/MCF transparent optical core networks 

    Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2018-08-15)
    Article
    Accés obert
    In this paper, we target an optimal multiple-input multiple-output digital signal processing (MIMO-DSP) assignment to super-channels affected by intercore crosstalk (ICXT) in multicore fiber (MCF) enabled transparent optical ...
  • Space continuity constraint in dynamic Flex-Grid/SDM optical core networks: An evaluation with spatial and spectral super-channels 

    Rumipamba Zambrano, Rubén Darío; Moreno Muro, Francisco Javier; Perelló Muntan, Jordi; Pavón Mariño, Pablo; Spadaro, Salvatore (Elsevier, 2018-08)
    Article
    Accés restringit per política de l'editorial
    Space Division Multiplexing (SDM) appears as a promising solution to overcome the capacity limits of single-mode optical fibers. In Flex-Grid/SDM optical networks, nodes offering full interconnection between input/output ...

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