Exploració per autor "Spadaro, Salvatore"
Ara es mostren els items 84-103 de 165
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High capacity converged passive optical network and RoF-based 5G+ fronthaul using 4-PAM and NOMA-CAP signals
Sarmiento Hernández, Samael; Delgado Mendinueta, José Manuel; Altabas Navarro, Jose Antonio; Spadaro, Salvatore; Shinada, Satoshi; Furukawa, Hideaki; Vegas Olmos, Juan José; Lázaro Villa, José Antonio; Wada, Naoya (Institute of Electrical and Electronics Engineers (IEEE), 2021-01-15)
Article
Accés obertNetwork architectural changes to satisfy all the 5G+ mobile network specifications and requirements are necessary due to the popularization of streaming and cloud applications on omnipresent portable devices. The combination ... -
ICT BONE views on the network of the future: the role of optical networking
Pattavina, Achille; Vlachos, Kyriakos; Petropoulos, Periklis; Callegati, Franco; Spadaro, Salvatore; Castoldi, Piero; Mitchell, John; Franzl, Gerald; Politi, Tanya; Tzanakaki, Anna; O'Mahony, Michael; Katrinis, Kostas; Van Daele, Peter; Pickavet, Mario; Simeonidou, Dimitra; Stavdas, Alexandros (2010)
Text en actes de congrés
Accés obertPart of the activities of the ICT EU Network of Excellence “Building the future Optical Network in Europe” (BONE) project is the development of the European Roadmap on Optical Networking in the context of the “Network ... -
Impact of multi-vendor transponders performance on design margin in optical networks
Mahajan, Ankush; Christodoulopoulos, Konstantinos; Martínez, Ricardo; Muñoz, Raul; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2021-01-01)
Article
Accés obertFor reliable and efficient network planning and operation, accurate estimation of Quality of Transmission (QoT) is necessary. In optical networks, a physical layer model (PLM) is typically used as a QoT estimation tool ... -
Impact of transponders and regenerators wake-up time on sleep-mode enabled translucent optical networks
Pagès Cruz, Albert; Tornatore, Massimo; Perelló Muntan, Jordi; Spadaro, Salvatore; Morea, Annalisa (2014)
Text en actes de congrés
Accés restringit per política de l'editorialSleep-mode enabled transponders and regenerators yield to substantial energy savings; however, their non-negligible wake-up time may degrade the network performance. We show that an appropriate dimensioning of the devices ... -
Improving QoT estimation accuracy with DGE monitoring using machine learning
Mahajan, Ankush; Christodoulopoulos, Konstantinos; Martinez, Ricardo; Spadaro, Salvatore; Muñoz, Raul (Institute of Electrical and Electronics Engineers (IEEE), 2020)
Text en actes de congrés
Accés restringit per política de l'editorialIn optical transport networks, Dynamic Gain Equalizers (DGE) are typically used at each link. A DGE selectively attenuates the channels to compensate the cumulative Erbium Doped Fiber Amplifier (EDFA) gain ripple effect ... -
Inter-core crosstalk impact on migration planning from elastic optical networks to spectrally-spatially flexible optical networks
Lechowicz, Piotr; Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Spadaro, Salvatore; Walkowiak, Krzysztof (Optical Society of American (OSA), 2019)
Text en actes de congrés
Accés obertWe study inter-core crosstalk (ICXT) impact on migration planning toward spectrally-spatially flexible optical networks considering 22-core multi-core fiber. Results reveal that 55-70% of links need to be upgraded when ... -
Introduction to IP over WDM
Spadaro, Salvatore; Careglio, Davide; Aracil Rico, Javier; Fernández Palacios, Juan Pedro; Jajszczyk, Andrzej; Larrabeiti, David; López, Víctor; Masip Bruin, Xavier; Sánchez López, Sergio (Springer, 2009-06-01)
Capítol de llibre
Accés restringit per política de l'editorialThe simple idea of having IP traffic directly transported over optical Wavelength Division Multiplexing (WDM) technology (“Internet Protocol (IP) over WDM”) has been envisioned as the future for the telecommunication ... -
Introduction to the ONDM2020 special issue
Casellas Regi, Ramon; Muñoz, Raul; Furdek, Marija; Spadaro, Salvatore; Zhu, Zuqing (Institute of Electrical and Electronics Engineers (IEEE), 2021-06-01)
Article
Accés obertThis JOCN special issue includes extended versions of selected papers that were presented at the 24th International Conference on Optical Network Design and Modeling (ONDM2020), which took place virtually on May 18–21, ... -
Joint content placement and lightpath routing and spectrum assignment in CDNs over elastic optical network scenarios
Perelló Muntan, Jordi; Walkowiak, Krzysztof; Klinkowski, Miroslaw; Spadaro, Salvatore; Careglio, Davide (2016-03-01)
Article
Accés obertIn this work, we address the problem of jointly deciding the placement of the contents delivered by a Content Distribution Network (CDN) among the available data centers, together with the allocation of the lightpaths ... -
LIGHTNESS: a deeply-programmable SDN-enabled data centre network with OCS/OPS Multicast/Unicast switch-over
Saridis, JM; Peng, Shpuping; Yan, Yan; Aguado, Alejandro; Buo, Bingli; Arslan, M; Jackson, C; Miao, Wang; Calabretta, Nicola; Agraz Bujan, Fernando; Spadaro, Salvatore; Bernini, Giacomo; Ciulli, Nicola; Zervas, G; Nejabati, Reza; Simeonidou, Dimitra (Institute of Electrical and Electronics Engineers (IEEE), 2015)
Text en actes de congrés
Accés restringit per política de l'editorialWe demonstrate an all-optical dynamic DCN utilizing a fully SDN-enabled data-plane including programmable FPGA-based NICs, offering Network Function Virtualization OCS/OPS driven multicasting for Virtual DC applications ... -
LIGHTNESS: a function-virtualizable software defined data center network with all-optical circuit/packet switching
Saridis, G. M.; Peng, S.; Yan, Yan; Aguado, A.; Guo, B.; Arslan, M.; Jackson, C.; Miao, W.; Calabretta, N.; Agraz Bujan, Fernando; Spadaro, Salvatore; Bernini, G.; Ciulli, N.; Zervas, G.; Nejabati, R.; Simeonidou, D. (2016-04-01)
Article
Accés obertModern high-performance data centers are responsible for delivering a huge variety of cloud applications to the end-users, which are increasingly pushing the limits of the currently deployed computing and network infrastructure. ... -
Lightpath fragmentation for efficient spectrum utilization in dynamic elastic optical networks
Pagès Cruz, Albert; Perelló Muntan, Jordi; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2012)
Text en actes de congrés
Accés obertThe spectrum-sliced elastic optical path network (SLICE) architecture has been presented as an efficient solution for flexible bandwidth allocation in optical networks. An homologous problem to the classical Routing and ... -
Link vs. opto-electronic device sleep mode approaches in survivable green optical networks
Perelló Muntan, Jordi; Morea, Annalisa; Spadaro, Salvatore; Tornatore, Massimo (Institute of Electrical and Electronics Engineers (IEEE), 2013)
Comunicació de congrés
Accés obertEnergy savings of link and OE device sleep mode approaches are compared in 1:1 protected optical networks, together with a hybrid solution combining both of them. The proposed hybrid solution can decrease network energy ... -
Machine learning assisted EDFA gain ripple modelling for accurate QoT estimation
Mahajan, Ankush; Christodoulopoulos, Konstantinos; Martínez Rivera, Ricardo Victor; Spadaro, Salvatore; Muñoz González, Raül (The Institution of Engineering and Technology, 2019)
Text en actes de congrés
Accés obertWavelength dependent EDFA gain ripple has an impact on connection's OSNR performance. We propose a machine learning regression model to estimate the end to end gain ripple penalty and to increase QoT estimation accuracy. -
Machine learning-based in-band OSNR estimation from optical spectra
Locatelli, Fabiano; Christodoulopoulos, Konstantinos; Svaluto Moreolo, Michela; Fàbrega, Josep Maria; Spadaro, Salvatore (2019-12-15)
Article
Accés obertMeasuring the optical signal to noise ratio (OSNR) at certain network points is essential for failure handling, for single connection but also global network optimization. Estimating OSNR is inherently difficult in dense ... -
Migration planning from elastic optical networks to spectrally-spatially flexible optical networks
Lechowicz, Piotr; Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Spadaro, Salvatore; Walkowiak, Krzysztof (Institute of Electrical and Electronics Engineers (IEEE), 2018)
Text en actes de congrés
Accés obertWe focus on a migration planning from elastic to spectrally-spatially flexible optical networks by upgrading regular with SDM-capable ROADMs. Our most promising strategy reveals that by migrating 30% of the regular ROADMs ... -
Modeling EDFA gain ripple and filter penalties with machine learning for accurate QoT estimation
Mahajan, Ankush; Christodoulopoulos, Konstantinos; Martínez, Ricardo; Spadaro, Salvatore; Muñoz, Raul (Institute of Electrical and Electronics Engineers (IEEE), 2020-05-01)
Article
Accés obertFor reliable and efficient network planning and operation, accurate estimation of Quality of Transmission (QoT) before establishing or reconfiguring the connection is necessary. In optical networks, a design margin is ... -
Modeling filtering penalties in ROADM-based networks with machine learning for QoT estimation
Mahajan, Ankush; Christodoulopoulos, Konstantinos; Martinez, Ricardo; Spadaro, Salvatore; Muñoz, Raul (2020)
Text en actes de congrés
Accés obertMonitoring 3dB bandwidth and other spectrum related parameters at ROADMs provides information about quality of their filters. We propose a machine-learning model to estimate end-to-end filtering penalty for more accurate ... -
Modelling and performance evaluation of a national scale switchless based network
Careglio, Davide; Solé Pareta, Josep; Junyent Giralt, Gabriel; Spadaro, Salvatore; Masip Torne, Jaume; Noguera Serra, Juan José (Springer, 2000)
Text en actes de congrés
Accés restringit per política de l'editorialIn a packet switching based scenario, optical technologies can not completely overcome the problem of insufficient network capacity, due to limitations produced by the presence of electronic switches and regenerators in ... -
Modelling multi-vendor transponders performance and optimizing launch power
Mahajan, Ankush; Christodoulopoulos, Konstantinos; Martínez Rivera, Ricardo Victor; Spadaro, Salvatore; Muñoz González, Raül (Institute of Electrical and Electronics Engineers (IEEE), 2020)
Text en actes de congrés
Accés obertWe propose physical layer model extensions that capture the performance variations of multivendor transponders and use those with appropriate algorithms to optimize connections’ launch powers. We estimated potential SNR ...