Now showing items 1-20 of 252

    • A column generation approach for large-scale RSA-based network planning 

      Ruiz Ramírez, Marc; Zotkiewicz, Mateusz; Velasco Esteban, Luis Domingo; Comellas Colomé, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      In flexgrid-based optical networks, the problem of finding optimal route and spectrum allocation (RSA) for the demands in a traffic matrix becomes harder to solve than similar problems in fixed DWDM networks, mainly due ...
    • A control and management architecture supporting autonomic NFV services 

      Velasco Esteban, Luis Domingo; Casellas Regi, Ramón; Llana, Sergio; Gifre Renom, Lluís; Martínez Rivera, Ricardo Victor; Vilata, Ricard; Muñoz González, Raül; Ruiz, Marc (2019-02)
      Article
      Open Access
      The proposed control, orchestration and management (COM) architecture is presented from a high-level point of view; it enables the dynamic provisioning of services such as network data connectivity or generic network slicing ...
    • A distributed telemetry architecture for optical networks 

      González Pacheco, Pol; Velasco Esteban, Luis Domingo; Ruiz Ramírez, Marc (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Conference report
      Open Access
      A distributed telemetry system is proposed with agents receiving and analyzing data before sending to a centralized manager. Intelligent data aggregation on optical constellations telemetry largely reduces data rate without ...
    • A GRASP with path-relinking heuristic for the survivable IP/MPLS-over-WSON multi-layer network optimization problem 

      Pedrola Escribà, Òscar; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo; Careglio, Davide; González de Dios, Óscar; Comellas Colomé, Jaume (2013-12)
      Article
      Restricted access - publisher's policy
      In this paper we deal with the survivable internet protocol (IP)/multi-protocol label switching (MPLS)-over-wavelength switched optical network (WSON) multi-layer network optimization problem (SIMNO). This problem entails ...
    • A GRASP-based heuristic to design the GMPLS control plane network topology with resilience guarantees 

      Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo; Junyent Giralt, Gabriel; Comellas Colomé, Jaume (IEEE Press. Institute of Electrical and Electronics Engineers, 2008)
      Conference report
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      The control plane topology has traditionally followed that of the data plane and therefore the design of the former, as well as its resilience, has been addressed in the latter's one. Owing to the fact that a clear separation ...
    • A hierarchical AI-based control plane solution for multi-technology deterministic networks 

      Giardina, Pietro G.; Bernini, Giacomo; Cárcel, José Luis; Rosales, Rafael; Frascolla, Valerio; Szilágyi, Péter; Velasco Esteban, Luis Domingo; Spadaro, Salvatore; Agraz Bujan, Fernando; Doostnejad, Roya; Chiasserini, Carla Fabiana; Robitzsch, Sebastian; Calvillo Fernández, Alejandro (Association for Computing Machinery (ACM), 2023)
      Conference report
      Open Access
      Following the Industry 4.0 vision of a full digitization of the industry, time-critical services and applications, allowing network infrastructures to deliver information with determinism and reliability, are becoming more ...
    • A latency-aware real-time video surveillance demo: network slicing for improving public safety 

      Shariati, Mohammad Behnam; Pedreno Manresa, José Juan; Dochhan, Annika; Siddique Muqaddas, Abubakar; Casellas Regi, Ramon; González de Dios, Oscar; Luque Canto, L.; Lent, Bodo; López de Vergara Méndez, Jorge Enrique; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Conference report
      Open Access
      We report the automated deployment of 5G services across a latency-aware, semi- disaggregated, and virtualized metro network. We summarize the key findings in a detailed analysis of end-to-end latency, service setup time, ...
    • A service-oriented hybrid access network and clouds architecture 

      Velasco Esteban, Luis Domingo; Contreras, Luis Miguel; Ferraris, Giuseppe; Stavdas, Alexandros; Cugini, Filippo; Wiegand, Manfred; Fernández Palacios, Juan Pedro (2015-04-01)
      Article
      Open Access
      Many telecom operators are deploying their own cloud infrastructure with the two-fold objective of providing cloud services to their customers and enabling network function virtualization. In this article we present an ...
    • A traffic intensity model for flexgrid optical network planning under dynamic traffic operation 

      Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
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      We obtain a model to estimate the highest traffic intensity that a flexgrid-based network can support in dynamic scenarios. A design problem is introduced to illustrate its application. Numerical results validate both ...
    • ABNO-driven content distribution in the telecom cloud 

      Gifre Renom, Lluís; Tornatore, Massimo; Contreras Murillo, Luis Miguel; Mukherjee, Biswanath; Velasco Esteban, Luis Domingo (2017-11-01)
      Article
      Open Access
      As current traffic growth is expected to strain capacity of today¿s metro network, novel content distribution architectures where contents are placed closer to the users are being investigated. In that regard, telecom ...
    • Accurate low complex modulation format and symbol rate identification for autonomous lightpath operation 

      Sequeira, Diogo Gonçalo; Ruiz Ramírez, Marc; Costa, Nelson; Napoli, Antonio; Pedro, João; Velasco Esteban, Luis Domingo (2022-11-28)
      Article
      Open Access
      Network automation promises to reduce costs while guaranteeing the required performance; this is paramount when dealing with the forecasted highly dynamic traffic that will be generated by new 5G/6G applications. In optical ...
    • Active PCE demonstration performing elastic operations and hitless defragmentation in flexible grid optical networks 

      Paolucci, Francesco; Castro Casales, Alberto; Fresi, Francesco; Imran, Muhammad; Giorgetti, Alessio; Bhownik, Bishanka Brata; Berrettini, Gianluca; Meloni, Gianluca; Cugini, Filippo; Velasco Esteban, Luis Domingo; Poti, Luca; Castoldi, Piero (2015-02-01)
      Article
      Restricted access - publisher's policy
    • Adaptation of the residual signal for filter failure detection in scenarios with multiple filter types 

      Barzegar, Sima; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (2019)
      Conference report
      Open Access
      To monitor the optical spectra of outgoing links, Optical Spectrum Analyzers (OSA) can deployed in the optical nodes acquiring the optical spectra of outgoing links and analyzing optical signals to detect ...
    • Adapting the virtual network topology to near future traffic 

      Morales Alcaide, Fernando; Festa, Paola; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
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      The introduction of new services requiring large and dynamic bitrate connectivity can cause changes in the direction of the traffic in metro and even core network segments along the day. This leads to large overprovisioning ...
    • After failure repair optimization in dynamic flexgrid optical networks 

      Ruiz Ramírez, Marc; Zotkiewicz, Mateusz; Castro Casales, Alberto; Klinkowski, Miroslaw; Velasco Esteban, Luis Domingo; Pioro, Michal (The Optical Society (OSA), 2014)
      Conference report
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      We introduce the problem of reoptimizing the network after a link failure has been repaired as an effective way for reducing capacity usage and improving network performance. Numerical results show gains higher than 42%.
    • 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 architecture to support autonomic slice networking 

      Velasco Esteban, Luis Domingo; Gifre Renom, Lluís; Izquierdo Zaragoza, José Luis; Paolucci, Francesco; Vela, Alba P.; Sgambelluri, Andrea; Ruiz Ramírez, Marc; Cugini, Filippo (2017-09-01)
      Article
      Open Access
      IEEE Network slices combine resource virtualization with the isolation level required by future 5G applications. In addition, the use of monitoring and data analytics help to maintain the required network performance, while ...
    • An autoencoder-based solution for IQ constellation analysis 

      Ruiz Ramírez, Marc; Morales López, Javier; Sequeira, Diogo Gonçalo; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Conference report
      Open Access
      A method for IQ constellation analysis based on Autoencoders is proposed. Exhaustive numerical results show accurate physical metric prediction and large data compression, while providing useful model explainability.
    • An elastic networks OMNeT++-based simulator 

      Asensio Garcia, Adrian; Castro Casales, Alberto; Velasco Esteban, Luis Domingo; Comellas Colomé, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      An increasing number of studies about flexgrid-based elastic optical networks are currently being carried out by industry as well as academic research teams. As access to real test-beds is limited, there is a lack of ...
    • 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 ...