Now showing items 21-40 of 44

    • Experimental assessment of ABNO-driven multicast connectivity in flexgrid networks 

      Gifre Renom, Lluís; Paolucci, Francesco; Gonzalez de Dios, Oscar; Velasco Esteban, Luis Domingo; Contreras, Luis Miguel; Cugini, Filippo; Castoldi, Piero; López Álvarez, Victor (2015-01-14)
      Article
      Open Access
      The increasing demand of internet services is pushing cloud services providers to increase the capacity of their data centers (DC) and create DC federations, where two or more cloud providers interconnect their infrastructures. ...
    • Experimental assessment of big data-backed video distribution in the telecom cloud 

      Gifre Renom, Lluís; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Restricted access - publisher's policy
      The telecom infrastructure is undergoing a huge transformation since operators are deploying their own cloud infrastructure to provide cloud services and enabling Network Functions Virtualization (NFV). The resulting ...
    • 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)
      Conference report
      Restricted access - publisher's policy
      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
      Restricted access - publisher's policy
      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 active and passive optical networks telemetry 

      Gifre Renom, Lluís; Izquierdo Zaragoza, José Luis; Shariati, Mohammad Behnam; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      A distributed architecture enabling active and passive optical network telemetry is presented; a YANG data model is used for remotely configuring monitoring devices for telemetry purposes. Experimental demonstration is ...
    • 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)
      Conference report
      Open Access
      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 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)
      Conference report
      Restricted access - publisher's policy
      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 demonstration of multi-vendor and multi-domain elastic optical network with data and control interoperability over a pan-european test-bed 

      González de Dios, Oscar; Casellas Regi, Ramón; Paolucci, Francesco; Napoli, Antonio; Gifre Renom, Lluís; Dupas, Arnaud; Hugues Salas, Emilio; Morro, Roberto; Belotti, Sergio; Meloni, Gianluca; Rahman, Talha; López Álvarez, Victor; Martínez Rivera, Ricardo Victor; Fresi, Francesco; Bohn, Marc; Yan, Shuangyi; Velasco Esteban, Luis Domingo; Layec, Patricia; Fernández Palacios, Juan Pedro (2016-04-01)
      Article
      Open Access
      The operation of multidomain and multivendor EONs can be achieved by interoperable sliceable bandwidth variable transponders (S-BVTs), a GMPLS/BGP-LS-based control plane, and a planning tool. The control plane is extended ...
    • Experimental validation of active frontend - backend stateful PCE operations in flexgrid optical network re-optimization 

      Martínez, Ricardo; Gifre Renom, Lluís; Casellas Regi, Ramón; Velasco Esteban, Luis Domingo; Muñoz González, Raul; Vilalta, Ricard (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      A PCE-based strategy for LSP re-optimization in flexgrid optical networks is experimentally validated. A front- and back-end stateful PCE architecture is deployed, wherein automatic and coordinated operations (e.g., ...
    • First demonstration of multi-vendor and multi-domain EON with S-BVT and control interoperability over Pan-European testbed 

      González de Dios, Oscar; Casellas Regi, Ramón; Paolucci, Francesco; Gifre Renom, Lluís; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Restricted access - publisher's policy
      The operation of multi-domain and multi-vendor EONscan be achieved by interoperable Sliceable Bandwidth Variable Transponders, a GMPLS/ BGP-LS -based control plane and a planning tool. This paper reports the first full ...
    • First experimental assessment of ABNO-driven in-operation flexgrid network re-optimization 

      Gifre Renom, Lluís; Paolucci, Francesco; Velasco Esteban, Luis Domingo; Aguado, Alejandro; Cugini, Filippo; Castoldi, Piero; López Álvarez, Victor (2015-02-01)
      Article
      Open Access
      Traffic affected by link failures can be recovered using path restoration schemes. In dynamically operated networks provided with a control plane, restoration algorithms run in a centralized element, such as the path ...
    • First experimental demonstration of ABNO-driven in-operation flexgrid network re-optimization 

      Velasco Esteban, Luis Domingo; Paolucci, Francesco; Gifre Renom, Lluís; Aguado, Alejandro; Cugini, Filippo; Castoldi, Piero; López, Víctor (The Optical Society (OSA), 2014)
      Conference report
      Open Access
      The after failure repair optimization problem is used to experimentally validate in-operation planning using the ABNO architecture to control a flexgrid optical network. A back-end PCE is used to solve this computational ...
    • Fully disaggregated ROADM white box with NETCONF/YANG control, telemetry, and machine learning-based monitoring 

      Sgambelluri, Andrea; Izquierdo Zaragoza, José Luis; Giorgetti, Alessio; Gifre Renom, Lluís; Velasco Esteban, Luis Domingo; Paolucci, Francesco; Sambo, Nicola; Fresi, Francesco; Castoldi, Piero; Morro, Roberto; Riccardi, Emilio; D'Errico, Alessio; Cugini, Filippo (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      A first demonstration of ROADM White Box augmented with machine learning capabilities is demonstrated. The white box includes various level of disaggregation, NETCONF/YANG control, telemetry and spectrum-based advanced ...
    • Implementación de aplicación masivamente paralela usando CUDA 

      Gifre Renom, Lluís (Universitat Politècnica de Catalunya, 2012-06-01)
      Master thesis (pre-Bologna period)
      Open Access
      Se ha reimplementado en C/C++ con extensiones de CUDA para cálculo paralelo parte de una aplicación dada que ya estaba hecha en Java, intentando optimizar los tiempos de cálculo de las tareas que más tiempo consumían en ...
    • In-operation planning in flexgrid optical core networks 

      Gifre Renom, Lluís (Universitat Politècnica de Catalunya, 2016-06-03)
      Doctoral thesis
      Open Access
      New generation applications, such as cloud computing or video distribution, can run in a telecom cloud infrastructure where the datacenters (DCs) of telecom operators are integrated in their networks thus, increasing ...
    • iONE: A workflow-oriented ABNO implementation 

      Velasco Esteban, Luis Domingo; Gifre Renom, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Restricted access - publisher's policy
      An implementation of the IETF standardized ABNO architecture, named as iONE is presented. iONE consists in one single generic configurable module and a set of dynamically linkable workflows. The spectrum defragmentation ...
    • iONE: an environment for experimentally assessing in-operation network planning algorithms 

      Gifre Renom, Lluís; Navarro, Nacho; Asensio Garcia, Adrian; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Restricted access - publisher's policy
      Huge amount of algorithmic research is being done in the field of optical networks, including Routing and Spectrum Allocation (RSA), elastic operations, spectrum defragmentation, and other re-optimization algorithms. ...
    • Modulation format-aware re-optimization in flexgrid optical networks: concept and experimental assessment 

      Gifre Renom, Lluís; Velasco Esteban, Luis Domingo; Casellas Regi, Ramón; Vilalta, Ricard (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Restricted access - publisher's policy
      A modulation format-aware algorithm to re-optimize resource utilization after a link repair is proposed. The proposed workflow implemented on an ABNO architecture and protocol extensions for SBVT and modulation format ...
    • Modulation format-aware restoration and re-optimization in Flexgrid optical networks 

      Gifre Renom, Lluís; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
    • On-demand incremental capacity planning in optical transport networks 

      Velasco Esteban, Luis Domingo; Morales Alcaide, Fernando; Gifre Renom, Lluís; Castro Casales, Alberto; González de Dios, Oscar; Ruiz Ramírez, Marc (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Article
      Restricted access - publisher's policy
      Incremental planning is performed periodically to decide how a backbone optical network has to be updated to serve the forecast traffic during the next planning period. Based on reliable traffic prediction, new equipment ...