Ara es mostren els items 42-61 de 252

    • CAPEX study for grid dependent multi-layer IP/MPLS-over-EON using relative BV-WSS costs 

      Pedrola Escribà, Òscar; Velasco Esteban, Luis Domingo; Fernández-Palacios, Juan Pedro; Castro Casales, Alberto; Careglio, Davide; Junyent Giralt, Gabriel (2012)
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      The impact of the frequency grid on the CAPEX required to deploy a multi-layer IP/MPLS-over-EON is analyzed. Results showing significant savings at the electronic layer motivate the introduction of narrower grids with ...
    • Carrier SDN for flexgrid-based inter-datacenter connectivity 

      Asensio Garcia, Adrian; Gifre Renom, Lluís; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      Managing inter-datacenter (DC) connectivity to transport increasing amounts of data and optimize DC performance and costs becomes a challenge not only for DC operators but also for network operators. Current inter-DC ...
    • Carrier SDN to control flexgrid-based inter-datacenter connectivity 

      Asensio Carmona, Adrian; Velasco Esteban, Luis Domingo; Ruiz Ramírez, Marc; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      Datacenter federations are able to manage appropriately the green energy resources available in each datacenter (DC) thanks to their geographically distributed infrastructure, thus reducing energy expenditure. Scheduling ...
    • CASTOR: a monitoring and data analytics architecture to support autonomic domain and slice networking 

      Vela, A.P.; Gifre Renom, Lluís; González de Dios, Oscar; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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      Network slices combine resource virtualization with the isolation level required by future 5G applications. In addition, the use of Monitoring and Data Analytics (MDA) helps to maintain the required network performance, ...
    • CASTOR: a monitoring and data analytics framework to help operators understand what is going on in their networks 

      Pérez Vela, Alba; Gifre Renom, Lluís; González de Dios, Oscar; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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      CASTOR MDA allows collecting huge amounts of measurements from devices. Such data needs to be preprocessed and analyzed to discover and summarize knowledge that can be consumed by human operators. Helper tools are demonstrated ...
    • CASTOR: An architecture to bring cognition to transport networks 

      Velasco Esteban, Luis Domingo; Gifre Renom, Lluís; Izquierdo Zaragoza, José Luis; Julián Moreno, Guillermo; López de Vergara Méndez, Jorge E. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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      CASTOR architecture to enable cognitive networking is demonstrated. Extended nodes make local decisions, whilst a centralized system beside the network controller makes network-wide decisions. Interaction with ONOS, Net2Plan, ...
    • Collective self-learning by exchanging ML models 

      Ruiz Ramírez, Marc; Boitier, Fabien; Layec, Patricia; Velasco Esteban, Luis Domingo (The Institution of Engineering and Technology (IET), 2019)
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      Collective self-learning based on Machine Learning (ML) model sharing and combination is proposed to accelerate ML-based algorithm deployment. The considered architecture is presented, together with different alternatives ...
    • Column generation algorithm for RSA problems in flexgrid optical networks 

      Ruiz Ramírez, Marc; Pioro, Michal; Zotkiewicz, Mateusz; Klinkowski, Miroslaw; Velasco Esteban, Luis Domingo (2013-10)
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      Finding optimal routes and spectrum allocation in flexgrid optical networks, known as the RSA problem, is an important design problem in transport communication networks. The problem is TeX -hard, and its intractability ...
    • Combining a machine learning and optimization for early pre-FEC BER degradation to meet committed QoS 

      Pérez Vela, Alba; Ruiz Ramírez, Marc; Cugini, Filippo; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2017)
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      Monitoring the physical layer is key to detect bit error rate (BER) degradation caused by failures and to identify the cause of the failure and localize the failed elements. Once the failure has been detected, actions can ...
    • Combining long-short term memory and reinforcement learning for improved autonomous network operation 

      Tabatabaeimehr, Fatemehsadat; Barzegar, Sima; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2021)
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      A combined LSTM and RL approach is proposed for dynamic connection capacity allocation. The LSTM predictor anticipates periodical long-term sharp traffic changes and extends short-term RL knowledge. Numerical results show ...
    • Comparing single layer and multilayer approaches to serve multicast requests on flexgrid networks 

      Gifre Renom, Lluís; Ruiz Ramírez, Marc; Asensio Garcia, Adrian; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2015)
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      Advanced services require high bitrate multicast connectivity being provided by core transport networks. Multicast services can be supported by a tree connecting the source to every destination of the multicast request. ...
    • Comparison of statistical and machine learning-based approaches for telemetry data size reduction 

      El Sayed, Ahmad Mohammad; Ruiz Ramírez, Marc; Harb, Hassan; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2023)
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      The implementation of next generation beyond 5G use cases such as the Digital Twin (DT) requires the transportation of increasingly large amounts of sensor telemetry data. The reduction of the size of these time series ...
    • Connectivity requirements for cloud-based services 

      Asensio García, Adrián; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (2016)
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      The expected explosion of services offered in the cloud has revealed new paradigms in telecommunication networks and motivated research to satisfy the needs arising. Interconnection between facilities hosting computing ...
    • Context-based e2e autonomous operation in B5G networks 

      Wang, Shaoxuan; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Multidisciplinary Digital Publishing Institute (MDPI), 2024-03-01)
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      The research and innovation related to fifth-generation (5G) networks that has been carried out in recent years has decided on the fundamentals of the smart slice in radio access networks (RANs), as well as the autonomous ...
    • Cooperative learning for disaggregated delay modeling in multidomain networks 

      Tabatabaeimehr, Fatemehsadat; Ruiz Ramírez, Marc; Proietti, Roberto; Velasco Esteban, Luis Domingo; Liu, Che-Yu; Chen, Xiaoliang; Ben Yoo, S. J. (2021-05-05)
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      Accurate delay estimation is one of the enablers of future network connectivity services, as it facilitates the application layer to anticipate network performance. If such connectivity services require isolation (slicing), ...
    • Cooperative learning for end-to-end delay modeling in multi-domain networks [Dataset] 

      Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Universitat Politècnica de Catalunya, 2020)
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    • Coordination of radio access and optical transport 

      Barzegar, Sima; Wang, Shaoxuan; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo; Richart Gutiérrez, Matías Mario; Castro Casales, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2023)
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      New 5G and beyond applications demand strict delay requirements. In this paper, we propose coordination between radio access and optical transport to guarantee such delay while optimizing optical capacity allocation. ...
    • Core VNT adaptation based on the aggregated metro-flow traffic model prediction 

      Morales Alcaide, Fernando; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Optical Society of American (OSA), 2017)
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      Aggregation of metro-flow traffic models is proposed to obtain valid core traffic predictive models for core VNT reconfiguration when metro and core networks are independently controlled. Exhaustive simulation results ...
    • Cost-effective ML-powered polarization-encoded quantum key distribution 

      Ahmadian, Seyed Morteza; Ruiz Ramírez, Marc; Comellas Colomé, Jaume; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2022-07-01)
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      Accés obert
      Secure communications have become a requirement for virtually all kind of applications. Currently, two distant parties can generate shared random secret keys by using public key cryptography. However, quantum computing ...
    • Cómo evaluar continua e individualmente en asignaturas basadas en proyectos 

      Velasco Esteban, Luis Domingo; Villavieja Prados, Carlos (2009-06-23T08:21:09Z)
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      En este artículo se describe el diseño de la asignatura de Projecte de Xarxes de Computadors i Sistemes Operatius (PXCSO) [1] de la Facultat d'Informàtica de Barcelona (FIB) [2], de la Universitat Politècnica de Catalunya ...