Ara es mostren els items 125-144 de 165

    • Quality of perception prediction in 5G slices for e-Health services using user-perceived QoS 

      Slimen, Yosra Ben; Balcerzak, Joanna; Pagès Cruz, Albert; Agraz Bujan, Fernando; Spadaro, Salvatore; Koutsopoulos, Konstantinos; Al-Bado, Mustafa; Truong, Thuy; Giardina, Pietro G.; Bernini, Giacomo (Elsevier, 2021-10-01)
      Article
      Accés obert
      In order to compete for a prominent market share, network operators and service providers should retain and increase the verticals’ subscription, catering to their needs in order to differentiate themselves from competitors. ...
    • Quality of transmission estimator retraining for dynamic optimization in optical networks 

      Mahajan, Ankush; Christodoulopoulos, Konstantinos; Martínez Rivera, Ricardo Victor; Muñoz González, Raül; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2021-04-01)
      Article
      Accés obert
      Optical network optimization involves an algorithm and a physical layer model (PLM) to estimate the quality of transmission of connections while examining candidate optimization operations. In particular, the algorithm ...
    • Real-time maintenance of latency-sensitive 5G services through network slicing 

      Montero Herrera, Rafael; Agraz Bujan, Fernando; Pagès Cruz, Albert; Spadaro, Salvatore (2020-06-30)
      Article
      Accés obert
      Network Slicing appears as one of the enabling technologies for 5G networks to accommodate services with different requirements and availability. The present work, seizes the use of network slicing and focuses on the ...
    • Recovery fairness and congestion control mechanisms in RPR networks 

      Domzal, Jerzy; Wajda, Krzysztof; Spadaro, Salvatore; Solé Pareta, Josep; Careglio, Davide (-, 2005-09-30)
      Text en actes de congrés
      Accés obert
      The paper describes fundamental features of RPR (Resilient Packet Ring - IEEE 802.17 standard). It focuses on proposals how to improve fairness mechanism and to increase network efficiency in state of congestion. Recovery ...
    • Reducing the number of transceivers with probabilistic constellation shaping in flex-grid over MCF optical backbone networks 

      Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Cho, Junho; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Comunicació de congrés
      Accés obert
      This paper quantifies the potential reduction in the number of required transceivers that the use of probabilistic constellation shaping (PCS) can bring to Flex-Grid over multicore fiber (MCF) optical backbone networks, ...
    • Resource orchestration in SDN-based future optical data centres 

      Spadaro, Salvatore; Pagès Cruz, Albert; Agraz Bujan, Fernando; Montero, Rafael; Perelló Muntan, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Data center (DC) infrastructures are a key element for nowadays Internet and cloud services. However, due to the increase of traffic that DCs have to manage, optical-based network architectures are being investigated to ...
    • Resources optimization in GMPLS-based optical multilayer networks 

      Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo; Spadaro, Salvatore; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (2009-06-09)
      Text en actes de congrés
      Accés restringit per política de l'editorial
    • Restoration in optical cloud networks with relocation and services differentiation 

      Natalino da Silva, Carlos; Wosinska, Lena; Spadaro, Salvatore; Costa, J. C. W. A.; Frances, Carlos; Monti, Paolo (Institute of Electrical and Electronics Engineers (IEEE), 2016-02-01)
      Article
      Accés obert
      Optical cloud networks allow for the integrated management of both optical and IT resources. In this paradigm, cloud services can be provisioned in an anycast fashion; i.e., only the source node asking for a service is ...
    • Results and achievements of the ALLIANCE Project: New network solutions for 5G and beyond 

      Careglio, Davide; Spadaro, Salvatore; Cabellos Aparicio, Alberto; Lázaro Villa, José Antonio; Barlet Ros, Pere; Gené Bernaus, Joan M.; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Suárez-Varela Maciá, José Rafael; Pagès Raventós, Albert; Paillissé Vilanova, Jordi; Almasan Puscas, Felician Paul; Domingo Pascual, Jordi; Solé Pareta, Josep (Multidisciplinary Digital Publishing Institute, 2021-09-30)
      Article
      Accés obert
      Leaving the current 4th generation of mobile communications behind, 5G will represent a disruptive paradigm shift integrating 5G Radio Access Networks (RANs), ultra-high-capacity access/metro/core optical networks, and ...
    • 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 ...
    • Routing protocol enhancements for power state engineering of green network elements 

      Verchere, Dominique; Morea, Annalisa; Spadaro, Salvatore; Le Sauze, Nicolas (IEEE, 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A routing protocol is enhanced to advertise the power state of node interfaces for wavelength switched optical networks to allow tuning the power consumption according to the data traffic demands. By engineering the different ...
    • Scalable hybrid path computation procedure for PCE-based 

      Hernández Sola, Guillem; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Spadaro, Salvatore; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In the Hierarchical Path Computation Element (H-PCE) architecture, an optimum end-to-end path is computed using a hierarchical relationship among PCEs. An H-PCE-based path computation procedure provides low network ...
    • Scalable hybrid path computation procedure for PCE-based multi-domain WSON networks 

      Hernández Sola, Guillem; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Spadaro, Salvatore; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (IEEE, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In the Hierarchical Path Computation Element (H-PCE) architecture, an optimum end-to-end path is computed using a hierarchical relationship among PCEs. An H-PCE-based path computation procedure provides low network blocking ...
    • 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 ...
    • SDN-controlled and orchestrated OPSquare DC architecture enabling network slice deployment with QoS guarantees 

      Montero, Rafael; Agraz Bujan, Fernando; Pagès Cruz, Albert; Calabretta, Nicola; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      We present a DC architecture that enables QoSdriven network slices reconfiguration. Per-slice monitoring information is collected; upon potential QoS degradation, reconfiguration of the slice network connectivity is ...
    • SDN-controlled and orchestrated OPSquare DCN enabling automatic network slicing with differentiated QoS provisioning 

      Xue, Xuwei; Wang, Fu; Agraz Bujan, Fernando; Pagès Cruz, Albert; Pan, Bitao; Yan, Fulong; Guo, Xiaojun; Spadaro, Salvatore; Calabretta, Nicola (Institute of Electrical and Electronics Engineers (IEEE), 2020-03-15)
      Article
      Accés obert
      Optical switching techniques have the potential to enable the optical data center network (DCN) interconnections providing high capacity and fast switching capabilities, overcoming thus the bandwidth and latency bottleneck ...
    • SDN-enabled flexible optical node designs and transceivers for sustainable metroaccess networks convergence 

      Sarmiento Hernández, Samael; Montero Herrera, Rafael; Altabas, Jose Antonio; Izquierdo, David; Agraz Bujan, Fernando; Pagès Cruz, Albert; Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Alonso Varela, Marc; Pascual, Álvaro; Garces, Ignacio; Spadaro, Salvatore; Lázaro Villa, José Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The Internet data traffic constant growth caused by the popularization of cloud services, mobile and social networks, is being stressed by the advent of 5G technologies. Hence, architectural changes are required at the ...
    • SDN-enabled OPS with QoS guarantee for reconfigurable virtual data center networks 

      Miao, Wang; Agraz Bujan, Fernando; Peng, Shuping; Spadaro, Salvatore; Bernini, Giacomo; Perelló Muntan, Jordi; Zervas, Georgios; Nejabati, Reza; Ciulli, Nicola; Simeonidou, Dimitra; Dorren, Harm; Calabretta, Nicola (Institute of Electrical and Electronics Engineers (IEEE), 2015-07-01)
      Article
      Accés obert
      Optical packet switching (OPS) can enhance the performance of data center networks (DCNs) by providing fast and large-capacity switching capability. Benefiting from the software-defined networking (SDN) control plane, which ...
    • SDN-enabled programmable optical packet/circuit switched intra data centre network 

      Guo, Bingli; Peng, Shuping; Jackson, Chris; Agraz Bujan, Fernando; Perelló Muntan, Jordi; Spadaro, Salvatore; Nejabati, Reza (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      We demonstrated an SDN-enabled optical DCN leveraging AoD, OPS, FPGA-based ToR with extended OpenDayLight controller and extended OF protocol. Experimental results show application-aware OCS/OPS connection provisioning ...
    • SDN-enabled reconfigurable optical data center network with automatic network slicing to provision dynamic QoS 

      Xue, Xuwei; Pan, Bitao; Agraz Bujan, Fernando; Pagès Cruz, Albert; Guo, Xiaotao; Yan, Fulong; Spadaro, Salvatore; Calabretta, Nicola (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      An SDN-controlled optical DCN enabling automatic QoS-driven network-slice provisioning, reconfiguration and flow-priority updating is demonstrated for the first-time. Network-slice reconfigurations with guaranteed QoS based ...