Now showing items 1-20 of 91

  • 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 ...
  • 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 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)
    External research report
    Open Access
    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 ...
  • A grid-enabled control plane architecture: the PHOSPHORUS approach 

    Simeonidou, Dimitra; Escalona, E.; Zervas, G.; Nejabati, R.; Spadaro, Salvatore; Binczewski, A.; Carrozzo, G.; Ciulli, N. (Optical Society of America, 2008)
    Conference report
    Open Access
    This paper presents the architecture of the Phosphorus Grid-enabled GMPLS (G2MPLS) Network Control Plane that implements the concept of Grid Network Services provisioning through a set of seamlessly integrated procedures.
  • Analysis of performance degradation in sleep-mode enabled core optical networks [invited] 

    Pagès Cruz, Albert; Tornatore, Massimo; Perelló Muntan, Jordi; Spadaro, Salvatore; Morea, Annalisa (Institute of Electrical and Electronics Engineers (IEEE), 2015-03-01)
    Article
    Open Access
    Energy efficiency is an important target for the management of wavelength-division-multiplexing-based core optical networks. A possible power management strategy for energy-efficient optical networks consists in putting ...
  • Analysis of traffic engineering information dissemination strategies in PCE-based multi-domain optical networks 

    Spadaro, Salvatore; Perelló Muntan, Jordi; Hernández Sola, Guillem; Moreno, A.; Agraz Bujan, Fernando; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (IEEE Computer Society Publications, 2010)
    Conference report
    Open Access
    This paper presents and compares different TE information dissemination strategies between Path Computation Elements (PCEs) in multi-domain optical networks. In such network context, recent studies have found that ...
  • An analytical model for GMPLS control plane resilience quantification 

    Ruiz, M; Perelló Muntan, Jordi; Velasco Esteban, Luis Domingo; Spadaro, Salvatore; Comellas Colomé, Jaume (2009-12)
    Article
    Open Access
    This paper concentrates on the resilience of the Generalized Multi-Protocol Label Switching (GMPLS) enabled control plane. To this end, the problem of control plane resilience in GMPLS-controlled networks is firstly stated ...
  • An experimental GMPLS-controlled network test-bed enabling sub-wavelength connection provisioning 

    Agraz Bujan, Fernando; Velasco Esteban, Luis Domingo; Perelló Muntan, Jordi; Ruiz Ramírez, Marc; Spadaro, Salvatore; Junyent Giralt, Gabriel; Comellas Colomé, Jaume (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-06-28)
    Conference report
    Open Access
    The efficient accommodation of sub-wavelength client flows on optical channels is a current challenge for resources use optimization in GMPLS controlled optical networks. While optical channels capacity usually exceeds 10 ...
  • A novel monitor placement algorithm for accurate performance monitoring in optical networks 

    Angelou, Marianna; Pointurier, Yvan; Azodolmolky, Siamak; Careglio, Davide; Spadaro, Salvatore; Tomkos, Ioannis (2011)
    Conference report
    Open Access
    We propose a novel monitor placement algorithm that reduces significantly the number of monitors required to accurately assess the QoT of all lightpaths established in an optical network, compared to other monitor placement ...
  • A novel SDN enabled hybrid optical packet/circuit switched data centre network: the LIGHTNESS approach 

    Peng, Shuping; Simeonidou, Dimitra; Zervas, George; Spadaro, Salvatore; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Careglio, Davide; Becerra Fontal, Yolanda; Farreras Esclusa, Montserrat (2014)
    Conference report
    Restricted access - publisher's policy
    Current over-provisioned and multi-tier data centre networks (DCN) deploy rigid control and management platforms, which are not able to accommodate the ever-growing workload driven by the increasing demand of ...
  • A quantitative evaluation of reordering in OBS networks and its impact on TCP performance 

    Perelló Muntan, Jordi; Gunreben, Sebastian; Spadaro, Salvatore (IEEE, 2008)
    Conference report
    Open Access
    This paper presents a layered framework to measure the reordering introduced by contention resolution strategies in OBS networks. In particular, characterization is based on the reordering metrics proposed by the IETF IPPM ...
  • A simulation study of combined routing and contention resolution algorithms in connection-oriented OPS network scenario 

    Klinkowski, Miroslaw; Careglio, Davide; Masip Bruin, Xavier; Spadaro, Salvatore; Sánchez López, Sergio; Solé Pareta, Josep (IEEE Press and Wiley, 2004-10-12)
    Conference report
    Open Access
    Connection-oriented optical packet-switched network integrates MPLS and OPS layers to exploit the best of electronic and optical technologies. In particular, routing components use enhanced routing algorithms to compute ...
  • Assessment of Flex-Grid/MCF optical networks with ROADM limited core switching capability 

    Rumipamba Zambrano, Rubén Darío; Moreno-Muro, F. J.; Pavón-Marino, Pablo; Perelló Muntan, Jordi; Spadaro, Salvatore; Solé Pareta, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Open Access
    The majority of the research studies on Flex-Grid over multi-core fiber (Flex-Grid/MCF) networks are built on the assumption of fully non-blocking ROADMs (FNB-ROADMs), able to switch any portion of the spectrum from any ...
  • Assessment of Flex-grid/SDM backbone networks under inter-core XT-limited transmission reach 

    Perelló Muntan, Jordi; Gene Bernaus, Joan M.; Lázaro Villa, José Antonio; Pagès Cruz, Albert; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Open Access
    In the present paper, we estimate the transmission reach of the optical signals through several state-of-the-art multi-core fibers reported in the literature considering ASE noise and inter-core crosstalk. Using these ...
  • Burst contention avoidance schemes in hybrid GMPLS-enabled OBS/OCS optical networks 

    Perelló Muntan, Jordi; Spadaro, Salvatore; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (IEEE Computer Society Publications, 2009-02)
    Conference report
    Open Access
    Hybrid optical network architectures, combining benefits of optical circuit and burst switching technologies, become a natural evolution to improve overall network performance while reducing related costs. This paper ...
  • Capacity quantification of joint-switching-enabled flex- grid/SDM optical backbone networks 

    Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Gene Bernaus, Joan M.; Spadaro, Salvatore (Optical Society of American (OSA), 2017)
    Conference report
    Restricted access - publisher's policy
    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.
  • Cognitive science applied to reduce network operation margins 

    Notivol Calleja, Luis David; Spadaro, Salvatore; Perelló Muntan, Jordi; Junyent Giralt, Gabriel (2017-06-08)
    Article
    Restricted access - publisher's policy
    In an increasingly competitive market environment with smaller product offer differentiation, a continuous maximization of efficiency, while guarantying the quality of the provided services, remains a main objective for ...
  • Correlation between traffic granularity and defragmentation periodicity in elastic optical networks 

    Sayyad Kodashenas, Pouria; Comellas Colomé, Jaume; Perelló Muntan, Jordi; Spadaro, Salvatore (Wiley-Blackwell, 2015-07-01)
    Article
    Open Access
    While elastic optical network technologies have emerged as promising solutions for future ultra-high-speed optical transmission, the unavoidable spectral fragmentation problem that appears in such networks significantly ...
  • Cost-effective DWDM ROADM design for flexible sustainable optical metro–access networks 

    Sarmiento Hernández, Samael; Altabas, Jose Antonio; Izquierdo, David; Garces, Ignacio; Spadaro, Salvatore; Lázaro Villa, José Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2017-12)
    Article
    Open Access
    Architectural changes are required for the underlying networks to support the expected Internet data traffic volume growth caused by the popularization of cloud services, 5G-based services, and social networks, to provide ...
  • Cost-effective ROADM architecture for C/DWDM metro-access networks convergence 

    Sarmiento Hernández, Samael; Spadaro, Salvatore; Lázaro Villa, José Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference lecture
    Restricted access - publisher's policy
    The Internet data traffic constant growth caused by the popularization of cloud services, mobile and social networks is requiring changes at the underlying networks in order to enable scalability whereas supporting a highly ...