Ara es mostren els items 1-20 de 41

    • A comparative study of calibration methods for low-cost ozone sensors in IoT platforms 

      Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge; Ripoll, Anna; Viana, Mar (2019-12-01)
      Article
      Accés obert
      This paper shows the result of the calibration process of an Internet of Things platform for the measurement of tropospheric ozone (O 3 ). This platform, formed by 60 nodes, deployed in Italy, Spain, and Austria, consisted ...
    • A conflict-free memory banking architecture for fast VOQ packet buffers 

      García Vidal, Jorge; Cerdà Alabern, Llorenç; Corbal San Adrián, Jesús; Valero Cortés, Mateo (Institute of Electrical and Electronics Engineers (IEEE), 2003)
      Text en actes de congrés
      Accés obert
      In order to support the enormous growth of the Internet, innovative research in every router subsystem is needed. We focus our attention on packet buffer design for routers supporting high-speed line rates. More specifically, ...
    • A cooperative ARQ for delay-tolerant vehicular networks 

      Morillo Pozo, Julián David; Trullols Cruces, Óscar; Barceló Ordinas, José María; García Vidal, Jorge (2008-07-25)
      Text en actes de congrés
      Accés obert
      This paper proposes a Cooperative ARQ protocol to be used in delay-tolerant vehicular networks. The proposed scheme has been implemented and evaluated through an experimental testbed, showing that packet losses in ...
    • A cooperative vehicular network framework 

      Trullols Cruces, Óscar; Morillo Pozo, Julián David; Barceló Ordinas, José María; García Vidal, Jorge (2009)
      Comunicació de congrés
      Accés obert
      Vehicular Ad Hoc Networks are networks characterized by intermittent connectivity and rapid changes in their topology. This paper addresses car-to-road communications in which vehicles use Access Points (AP) in a Delay ...
    • A DRAM/SRAM memory scheme for fast packet buffers 

      García Vidal, Jorge; March, Maribel; Cerdà Alabern, Llorenç; Corbal San Adrián, Jesús; Valero Cortés, Mateo (2006-05)
      Article
      Accés obert
      We address the design of high-speed packet buffers for Internet routers. We use a general DRAM/SRAM architecture for which previous proposals can be seen as particular cases. For this architecture, large SRAMs are needed ...
    • A low-power IoT device for measuring water table levels and soil moisture to ease increased crop yields 

      López, Emiliano; Vionnet, Carlos; Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge; Contini, Guillermo; Prodolliet, Jorge; Maiztegui, José (2022-09-09)
      Article
      Accés obert
      The simultaneous measurement of soil water content and water table levels is of great agronomic and hydrological interest. Not only does soil moisture represent the water available for plant growth but also water table ...
    • An abstraction methodology for the evaluation of multi-core multi-threaded architectures 

      Zilan, Ruken; Verdú Mulà, Javier; García Vidal, Jorge; Nemirovsky, Mario; Milito, Rodolfo; Valero Cortés, Mateo (IEEE Computer Society Publications, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      As the evolution of multi-core multi-threaded processors continues, the complexity demanded to perform an extensive trade-off analysis, increases proportionally. Cycle-accurate or trace-driven simulators are too slow to ...
    • Applying cooperation for delay tolerant vehicular networks 

      Morillo Pozo, Julián David; Barceló Ordinas, José María; Trullols Cruces, Óscar; García Vidal, Jorge (2008-01-18)
      Comunicació de congrés
      Accés obert
      This paper proposes a Cooperative ARQ protocol to be used in delay-tolerant vehicular networks. The proposed scheme has been implemented and evaluated through an experimental testbed, showing that packet losses in ...
    • Brief announcement: Game theoretical approach for energy-delay balancing in distributed duty-cycled MAC protocols of wireless networks 

      Doudou, Messaoud; Barceló Ordinas, José María; Djenouri, Djamel; García Vidal, Jorge; Badache, Nadjib (Association for Computing Machinery (ACM), 2014)
      Text en actes de congrés
      Accés obert
      Optimizing energy consumption and end-to-end (e2e) packet delay in energy constrained distributed wireless networks is a conflicting multi-objective optimization problem. This paper investigates this trade-off from a ...
    • Bursty cell stream characterization 

      Solé Pareta, Josep; Domingo Pascual, Jordi; García Vidal, Jorge (1989-01)
      Report de recerca
      Accés obert
      Traffic cell stream generated by a single source (or a single connection traffic cell stream) may be characterized by its mean traffic intensity (or normalized mean cell rate) Ai, but also by its burstiness. "Burstiness ...
    • Calibrating low-cost air quality sensors using multiple arrays of sensors 

      Barceló Ordinas, José María; García Vidal, Jorge; Doudou, Messaoud; Rodrigo Muñoz, Santiago; Cerezo Llavero, Albert (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés obert
      The remarkable advances in sensing and communication technologies have introduced increasingly low-cost, smart and portable sensors that can be embedded everywhere and play an important role in environmental sensing ...
    • Data reconstruction applications for IoT air pollution sensor networks using graph signal processing 

      Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge (Elsevier, 2022-09)
      Article
      Accés restringit per política de l'editorial
      The analysis of sensor networks for air pollution monitoring is challenging. Recent studies have demonstrated the ability to reconstruct the network measurements with graphs derived from the acquired data, thus describing ...
    • Design and implementation of high-performance memory systems for future packet buffers 

      García Vidal, Jorge; Corbal San Adrián, Jesús; Cerdà Alabern, Llorenç; Valero Cortés, Mateo (Institute of Electrical and Electronics Engineers (IEEE), 2003)
      Text en actes de congrés
      Accés obert
      In this paper, we address the design of a future high-speed router that supports line rates as high as OC-3072 (160 Gb/s), around one hundred ports and several service classes. Building such a high-speed router would raise ...
    • Distributed multi-scale calibration of low-cost ozone sensors in wireless sensor networks 

      Barceló Ordinas, José María; Ferrer Cid, Pau; García Vidal, Jorge; Ripoll, Anna; Viana, Mar (Multidisciplinary Digital Publishing Institute (MDPI), 2019-05-31)
      Article
      Accés obert
      New advances in sensor technologies and communications in wireless sensor networks have favored the introduction of low-cost sensors for monitoring air quality applications. In this article, we present the results of the ...
    • Evaluation of a cooperative ARQ protocol for delay-tolerant vehicular networks 

      Morillo Pozo, Julián David; Trullols Cruces, Óscar; Barceló Ordinas, José María; García Vidal, Jorge (2008-10-16)
      Capítol de llibre
      Accés obert
      This paper evaluates a Cooperative ARQ protocol to be used in delay-tolerant vehicular networks. The scenario consists in cars downloading information from Access Points along a road. The key difference between proposed ...
    • Game theory framework for MAC parameter optimization in energy-delay constrained sensor networks 

      Doudou, Messaoud; Barceló Ordinas, José María; Djenouri, Djamel; García Vidal, Jorge; Bouabdallah, Abdelmadjid; Badache, Nadjib (2016-05)
      Article
      Accés obert
      Optimizing energy consumption and end-to-end (e2e) packet delay in energy-constrained, delay-sensitive wireless sensor networks is a conflicting multiobjective optimization problem. We investigate the problem from a game ...
    • Graph learning techniques using structured data for IoT air pollution monitoring platforms 

      Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge (Institute of Electrical and Electronics Engineers (IEEE), 2021-09-01)
      Article
      Accés obert
      Existing air pollution monitoring networks use reference stations as the main nodes. The addition of low-cost sensors calibrated in-situ with machine learning techniques allows the creation of heterogeneous air pollution ...
    • Graph signal reconstruction techniques for IoT air pollution monitoring platforms 

      Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge (Institute of Electrical and Electronics Engineers (IEEE), 2022-12-15)
      Article
      Accés obert
      Air pollution monitoring platforms play a very important role in preventing and mitigating the effects of pollution. Recent advances in the field of graph signal processing have made it possible to describe and analyze air ...
    • H2020 project CAPTOR dataset: Raw data collected by low-cost MOX ozone sensors in a real air pollution monitoring network 

      Barceló Ordinas, José María; Ferrer Cid, Pau; García Vidal, Jorge; Viana Rodríguez, Mar; Ripoll, Anna (Elsevier, 2021-06)
      Article
      Accés obert
      The H2020 CAPTOR project deployed three testbeds in Spain, Italy and Austria with low-cost sensors for the measurement of tropospheric ozone (O3). The aim of the H2020 CAPTOR project was to raise public awareness in a ...
    • IEEE 802.16e en Intelligent Transport Systems (ITS) 

      Suñol Capella, Josep; García Vidal, Jorge (2007-05-24)
      Report de recerca
      Accés obert
      Posibilidades que ofrecen el IEEE estándar 802.16e, con respecto a los servicios que se pueden ofrecer a la industria del automóvil en sistemas inteligentes del transporte.