Ara es mostren els items 1-20 de 39

    • 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)
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    • Advantages of a PCE-based control plane for LISP 

      Castro Casales, Alberto; Germán Duarte, Martín; Gagliano Molla, Roque; Grampin Castro, Eduardo; Masip Bruin, Xavier; Yannuzzi, Marcelo (ACM Press. Association for Computing Machinery, 2008)
      Comunicació de congrés
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      The Locator/Identifier Separation Protocol (LISP) is one of the candidate solutions to address the scalability issues in inter-domain routing. The current proposals for its control plane (e.g., ALT, CONS, NERD) have various ...
    • 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)
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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 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)
      Text en actes de congrés
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      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 in-operation planning tool architecture for flexgrid network re-optimization 

      Gifre Renom, Lluís; Castro Casales, Alberto; Ruiz Ramírez, Marc; Navarro, Nacho; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      In-operation network planning consists in re-optimizing a network, currently being operated to transport traffic, either minimizing resource utilization or maximizing the transported traffic. In the context of flexgrid ...
    • Brokered orchestration for end-to-end service provisioning across heterogeneous multi-operator (Multi-AS) optical networks 

      Castro Casales, Alberto; Velasco Esteban, Luis Domingo; Gifre Renom, Lluís; Chen, Cen; Yin, Jie; Zhu, Zuqing; Proietti, Roberto; Yoo, Sung-Joo Ben (2016-12-01)
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      Accés obert
      This paper proposes a new networking paradigm introducing the broker-plane above the management planes of Autonomous Systems (ASes). The brokers communicate with the manager of each AS to assist coordinate end-to-end ...
    • 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)
      Text en actes de congrés
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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 ...
    • 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)
      Text en actes de congrés
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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. ...
    • Cross-stratum orchestration and flexgrid optical networks for datacenter federations 

      Velasco Esteban, Luis Domingo; Asensio Garcia, Adrian; Castro Casales, Alberto; Berral García, Josep Lluís; Carrera Pérez, David; López, Víctor; Fernández Palacios, Juan Pedro (2013-11)
      Article
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      Current inter-data-center connections are configured as static big fat pipes, which entails large bit rate over-provisioning and thus high operational costs for DC operators. On the other hand, network operators cannot ...
    • Dynamic restoration in multi-layer IP/MPLS-over-flexgrid networks 

      Castro Casales, Alberto; Velasco Esteban, Luis Domingo; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (2013)
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      The recent advances in photonic technology will allow deploying flexgrid-based optical core networks in the near future. Although that technology favors more efficient spectrum utilization, multilayer IP/MPLS-over-flexgrid ...
    • End-to-end KPI analysis in converged fixed-mobile networks 

      Ruiz Ramírez, Marc; Richart Gutiérrez, Matías Mario; Castro Casales, Alberto; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Text en actes de congrés
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      The independent operation of mobile and fixed network segments is one of the main barriers that prevents improving network performance while reducing capital expenditures coming from overprovisioning. In particular, a ...
    • Experimental assessment of bulk path restoration in multi-layer networks using PCE-based global concurrent optimization 

      Castro Casales, Alberto; Martínez, Ricardo; Casellas Regi, Ramón; Velasco Esteban, Luis Domingo; Muñoz, Raúl; Vilalta, Ricard; Comellas Colomé, Jaume (2014-01-01)
      Article
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      Generalized multi-protocol label switching-based multi-layer networks (MLN) combining packet and optical switching lead to jointly leverage intrinsic per-layer benefits such as statistical multiplexing and huge transport ...
    • Experimental assessment of degradation - triggered reconfiguration in optically interconnected cloud - RAN 

      Gifre Renom, Lluís; Ruiz Ramírez, Marc; Castro Casales, Alberto; Proietti, Roberto; Yoo, Sung-Joo Ben; Velasco Esteban, Luis Domingo (Optical Society of American (OSA), 2017)
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      C-RAN control architecture is proposed and experimentally assessed. A local controller in each location receives latency, jitter, and BER monitoring data from local BBUs and detects a CPRI degradation, which triggers a ...
    • Experimental assessment of in-operation spectrum defragmentation 

      Gifre Renom, Lluís; Paolucci, Francesco; Aguado, Alejandro; Casellas Regi, Ramón; Castro Casales, Alberto; Cugini, Filippo; Castoldi, Piero; Velasco Esteban, Luis Domingo; López Grimau, Víctor (2014-06-01)
      Article
      Accés restringit per política de l'editorial
      Dynamic operation of flexgrid networks might cause optical spectrum to be divided into fragments, which makes it difficult finding contiguous spectrum of the required width for incoming connection requests, leading thus ...
    • Experimental demonstration of an active stateful PCE performing elastic operations and hitless defragmentation 

      Castro Casales, Alberto; Paolucci, Francesco; Fresi, Francesco; Imran, Muhammad; Bhowmik, Bishanka; Berrettini, Gianluca; Meloni, Gianluca; Giorgetti, Alessio; Cugini, Filippo; Velasco Esteban, Luis Domingo; Poti, Luca; Castoldi, Piero (2013)
      Text en actes de congrés
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      An experimental demonstration of active stateful PCE for flexgrid networks is presented. The PCE enables elastic operations on established connections and, when required, performs hitless defragmentation of spectrum ...
    • Experimental demonstration of brokered orchestration for end-to-end service provisioning and interoperability across heterogeneous multi-operator (multi-AS) optical networks 

      Castro Casales, Alberto; Gifre Renom, Lluís; Chen, C.; Yin, J.; Zhu, Z.; Velasco Esteban, Luis Domingo; Yoo, S. J. B. (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Text en actes de congrés
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      A broker on top of opaquely-managed optical domains advertising their capabilities is proposed to provision multi-AS connections in multi-operator scenarios. In case of no spectrum continuity, intra-domain spectral ...
    • Experimental demonstration of cognitive provisioning and alien wavelength monitoring in multi-domain EON 

      Proietti, Roberto; Chen, Xiaoliang; Castro Casales, Alberto; Liu, Gengchen; Lu, Hongbo; Zhang, Kaiqi; Guo, Jiannan; Zhu, Zuqing; Velasco Esteban, Luis Domingo; Yoo, Sung-Joo Ben (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
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      This paper proposes a cognitive multi-domain EON architecture with machine-learning aided RMSA and alien wavelength monitoring. Testbed experiments show modulation format recognition, QoT monitoring and cognitive routing ...
    • Experimental demonstration of heterogeneous cross stratum broker for scientific applications 

      Castro Casales, Alberto; Pérez Vela, Alba; Gifre Renom, Lluís; Proietti, Roberto; Cen, Chen; Yin, J.; Chen, Xiaoliang; Cao, Zheng; Zhu, Zuqing; Mishra, Vinod; Velasco Esteban, Luis Domingo; Yoo, S. J. B. (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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      We propose and demonstrate cross-stratum Broker orchestration for scientific applications and heterogeneous resources reservation in DCs, HPC facilities and networks belonging to different operators. Experiments were ...
    • Experimental evaluation of a dynamic PCE-based regenerator-efficient IA-RWA algorithm in translucent WSON 

      Castro Casales, Alberto; Martínez, Ricardo; Velasco Esteban, Luis Domingo; Casellas Regi, Ramón; Muñoz González, Raül; Comellas Colomé, Jaume (2012)
      Text en actes de congrés
      Accés obert
      We devise a novel dynamic PCE-based impairment-aware RWA algorithm in translucent GMPLS WSON that minimizes regenerator usage. Experimental evaluation carried out on the Open GMPLS/PCE control plane of CTTC ADRENALINE ...
    • Extending the flexgrid optical core towards the edges 

      Velasco Esteban, Luis Domingo; Ruiz Ramírez, Marc; Castro Casales, Alberto; Comellas Colomé, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      National IP/MPLS network have being designed on top of fixed-grid DWDM optical networks so to spread out covering large areas. Besides, multilayer IP/MPLS-over-DWDM networks take advantage from grooming to achieve high ...