Now showing items 1-20 of 39

    • 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
      Open Access
      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 cooperative ARQ for delay-tolerant vehicular networks 

      Morillo Pozo, Julián David; Trullols Cruces, Óscar; Barceló Ordinas, José María; García Vidal, Jorge (2008-07-25)
      Conference report
      Open Access
      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)
      Conference lecture
      Open Access
      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 hybrid cooperative design for energy-efficient surveillance in wireless multimedia sensor networks 

      Alaei, Mohammad; Barceló Ordinas, José María (VDE Conference Publications, 2012)
      Conference report
      Restricted access - publisher's policy
      In Wireless Multimedia Sensor Networks (WMSNs) the lifetime of battery-operated visual nodes is limited by their energy consumption, which is proportional to the energy required for sensing, processing, and transmitting ...
    • A Max coverage formulation for information dissemination in vehicular networks 

      Trullols Cruces, Óscar; Barceló Ordinas, José María; Fiore, Marco; Casetti, Claudio; Chiasserini, Carla-Fabiana (IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
      Conference lecture
      Open Access
      We consider that a given number of Dissemination Points (DPs) have to be deployed for disseminating information to vehicles travelling in an urban area. We formulate our problem as a Maximum Coverage Problem (MCP) so as ...
    • A method for clustering and cooperation in wireless multimedia sensor networks 

      Alaei, Mohammad; Barceló Ordinas, José María (2010-04)
      Article
      Open Access
      Wireless multimedia sensor nodes sense areas that are uncorrelated to the areas covered by radio neighbouring sensors. Thus, node clustering for coordinating multimedia sensing and processing cannot be based on classical ...
    • Analytical models for the multiplexing of worst case traffic sources and their application to ATM traffic control. 

      Barceló Ordinas, José María (Universitat Politècnica de Catalunya, 1998-04-23)
      Doctoral thesis
      Open Access
    • Applying cooperation for delay tolerant vehicular networks 

      Morillo Pozo, Julián David; Barceló Ordinas, José María; Trullols Cruces, Óscar; García Vidal, Jorge (2008-01-18)
      Conference lecture
      Open Access
      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)
      Conference report
      Open Access
      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 ...
    • 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)
      Conference report
      Open Access
      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 ...
    • CONCEPTES BÀSICS DE XARXES DE COMPUTADORS (Examen 1r quadrim.) 

      Barceló Ordinas, José María (Universitat Politècnica de Catalunya, 2002-01-15)
      Exam
      Restricted access to the UPC academic community
    • Cooperative download in urban vehicular networks 

      Fiore, Marco; Barceló Ordinas, José María (IEEE Computer Society Publications, 2009-10-12)
      Conference report
      Open Access
      We target urban scenarios where vehicular users can download large files from road-side Access Points (APs), and define a framework to exploit opportunistic encounters between mobile nodes to increase their transfer rate. ...
    • Cooperative download in vehicular environments 

      Trullols Cruces, Óscar; Fiore, Marco; Barceló Ordinas, José María (2011-05-12)
      Article
      Restricted access - publisher's policy
      We consider a complex (i.e., nonlinear) road scenario where users aboard vehicles equipped with communication interfaces are interested in downloading large files from road-side Access Points (APs). We investigate the ...
    • Cost effective node deployment strategy for energy-balanced and delay-efficient data collection in wireless sensor networks 

      Doudou, Messaoud; Djenouri, Djamel; Barceló Ordinas, José María; Badache, Nadjib (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Open Access
      The real-world node deployment aspect is investigated, while considering cost minimization for resolving the energy hole around the sink, which represents a serious problem in typical sensor networks with uniform distribution. ...
    • Delay-efficient MAC protocol with traffic differentiation and run-time parameter adaptation for energy-constrained wireless sensor networks 

      Doudou, Messaoud; Djenouri, Diamel; Barceló Ordinas, José María; Badache, Nadjib (2016-02-01)
      Article
      Open Access
      This paper presents an asynchronous cascading wake-up MAC protocol for heterogeneous traffic gathering in low-power wireless sensor networks. It jointly considers energy/delay optimization and switches between two modes, ...
    • 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
      Open Access
      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 ...
    • Duo-MAC: Energy and time constrained data delivery MAC protocol in wireless sensor networks 

      Doudou, Messaoud; Alaei, Mohammad; Djenouri, Djamel; Barceló Ordinas, José María; Badache, Nadjib (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      We present Duo-MAC, an asynchronous cascading wake-up scheduled MAC protocol for heterogeneous traffic forwarding in low-power wireless networks. Duo-MAC deals with energy-delay minimization problem and copes with transmission ...
    • Energy efficiency of MAC protocols in low data rate wireless multimedia sensor networks: A comparative study 

      Alskaif, Tarek; Bellalta Jiménez, Boris; Guerrero Zapata, Manel; Barceló Ordinas, José María (Elsevier, 2017-03-01)
      Article
      Open Access
      Some new application scenarios for Wireless Sensor Networks (WSNs) such as urban resilience, smart house/building, smart agriculture and animal farming, among others, can be enhanced by adding multimedia sensors able to ...
    • 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)
      Part of book or chapter of book
      Open Access
      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 ...
    • Exact decoding probability under random linear network coding 

      Trullols Cruces, Óscar; Barceló Ordinas, José María; Fiore, Marco (2011-01)
      Article
      Open Access
      In this letter, we compute the exact probability that a receiver obtains N linearly independent packets among K ≥ N received packets, when the sender/s use/s random linear network coding over a Galois Field of size q. Such ...