Now showing items 21-40 of 201

    • An energy efficient protocol architecture for m-Health systems 

      Tennina, Stefano; Kartsakli, Elli; Graziosi, Fabio; Santos, Manuel; Lalos, Aristeidis; Antonopoulos, Angelos; Mekikis, Prodromos Vasileios; Di Renzo, Marco; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2014)
      Conference report
      Restricted access - publisher's policy
      Contemporary technologies as implemented in the field of health care have provided the everyday clinical practice with a plethora of tools to be used in various settings. However, from all established and emerging applications, ...
    • An intelligent fuzzy-based cluster head selection system for wireless sensor networks and its performance evaluation 

      Ando, Hironori; Barolli, Leonard; Durresi, Arjan; Xhafa Xhafa, Fatos; Koyama, Akio (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Conference report
      Open Access
      Sensor networks supported by recent technological advances in low power wireless communications along with silicon integration of various functionalities are emerging as a critically important computer class that enable ...
    • An intelligent fuzzy-based cluster head selection system for WSNs and its performance evaluation for D3N parameter 

      Ando, Hironori; Barolli, Leonard; Durresi, Arjan; Xhafa Xhafa, Fatos; Koyama, Akio (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Conference report
      Open Access
      Cluster formation and cluster head selection are important problems in sensor network applications and can drastically affect the network's communication energy dissipation. However, selecting of the cluster head is not ...
    • Application of Thermoelectric Generators for Low-Temperature-Gradient Energy Harvesting 

      Liu, Yuming; Riba Ruiz, Jordi-Roger; Moreno Eguilaz, Juan Manuel; Sanllehí Muñoz, Josep (Multidisciplinary Digital Publishing Institute, 2023-02-17)
      Article
      Open Access
      Thermoelectric generators (TEGs) convert a temperature difference into useful direct current (DC) power. TEGs are solid-state semiconductor devices that are generating a lot of interest for energy harvesting purposes in ...
    • Avaluació d'un sistema d'alimentació basat en energia solar per a nodes de xarxes de sensors sense fils 

      Marti Chico, Sergi (Universitat Politècnica de Catalunya, 2014-06-03)
      Master thesis
      Open Access
      This thesis provides an evaluation of a solar energy system employed as power supply for wireless sensor motes. For such purpose, it first gives an overview of the two most popular operating systems in Wireless Sensor ...
    • Bluetooth Low Energy based on the nRF52840 USB dongle 

      Ribas Sobreviela, Jordi (Universitat Politècnica de Catalunya, 2019-10-09)
      Bachelor thesis
      Open Access
      The objective of this report is to explain the process of creating a system that receives data from a sensor, which is connected to a power source, and sends it to a computer without using wires. The technologies chosen ...
    • 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 ...
    • Comunicación de parámetros ambientales mediante Xbee alimentado de forma autónoma con energía renovable 

      Macia Ruiz, Martín (Universitat Politècnica de Catalunya, 2016-07-11)
      Bachelor thesis
      Restricted access - author's decision
      El objetivo de este proyecto es crear una comunicación del valor porcentual de luz solar y de temperatura incidente en un punto , de manera inalámbrica entre dos dispositivos, con el menor consumo posible. Dicho proyecto, ...
    • Connectivity analysis in clustered wireless sensor networks powered by solar energy 

      Mekikis, Prodromos Vasileios; Kartsakli, Elli; Antonopoulos, Angelos; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (Institute of Electrical and Electronics Engineers (IEEE), 2018-04)
      Article
      Open Access
      Emerging 5G communication paradigms, such as machine-type communication, have triggered an explosion in ad-hoc applications that require connectivity among the nodes of wireless networks. Ensuring a reliable network operation ...
    • Connectivity analysis in wireless-powered sensor networks with battery-less devices 

      Mekikis, Prodromos Vasileios; Antonopoulos, Angelos; Kartsakli, Elli; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      The emerging Internet of Things paradigm has triggered an explosion in ad-hoc applications that require connectivity among the nodes of wireless networks. However, the channel randomness and the random deployment of such ...
    • Connectivity of large-scale WSNs in fading environments under different routing Mechanisms 

      Antonopoulos, Angelos; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos; Lalos, Aristeidis; Mekikis, Prodromos Vasileios; Kartsakli, Elli (Institute of Electrical and Electronic Engineers, 2015-06-12)
      Conference lecture
      Open Access
      As the number of nodes in wireless sensor networks (WSNs) increases, new challenges have to be faced in order to maintain their performance. A fundamental requirement of several applications is the correct transmission of ...
    • Connectivity of large-scale WSNs in fading environments under different routing mechanisms 

      Mekikis, Prodromos Vasileios; Kartsakli, Elli; Lalos, Aristeidis; Antonopoulos, Angelos; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Restricted access - publisher's policy
      As the number of nodes in wireless sensor networks (WSNs) increases, new challenges have to be faced in order to maintain their performance. A fundamental requirement of several applications is the correct transmission of ...
    • Consensus in random WSNs with correlated symmetric links 

      Silva Pereira, Silvana; Pagès Zamora, Alba Maria (2011)
      Conference lecture
      Restricted access - publisher's policy
      In this paper we study the convergence of consensus algorithms in wireless sensor networks with random topologies and instantaneous symmetric links which exist with different probabilities independently in time but correlated ...
    • Contiki applications for Z1 motes for 6LowPAN 

      Mimbrero Catalán, Jose Ignacio (Universitat Politècnica de Catalunya, 2016-02-08)
      Master thesis (pre-Bologna period)
      Open Access
      Contiki application for the Z1 motes of Zolertia, using the protocol 6LowPAN
    • Contribution to the development of a hypervisor in a virtualized mobile communication network 

      Vilà Muñoz, Irene (Universitat Politècnica de Catalunya, 2017-07)
      Master thesis
      Open Access
      Software Defined Networking (SDN) and Network Function Virtualization (NFV) are two promising technologies that together provide a more efficient utilization of the network resources and a reduction of operational costs. ...
    • 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. ...
    • Data relevance-aware dynamic sensing technique with battery lifetime guarantee for wireless sensor nodes 

      Arnaiz, David; Moll Echeto, Francisco de Borja; Alarcón Cot, Eduardo José; Vilajosana, Ignasi (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Conference report
      Restricted access - publisher's policy
      Significant effort has been devoted to the development of dynamic monitoring techniques to exploit the temporal correlation among observations with the intention of improving the energy efficiency in wireless sensor nodes. ...
    • DCT-based air interface design for function computation 

      Martínez Gost, Marc; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (Institute of Electrical and Electronics Engineers (IEEE), 2023-02-02)
      Article
      Open Access
      With the integration of communication and computing, it is expected that part of the computing is transferred to the transmitter side. In this paper we address the general problem of Frequency Modulation (FM) for function ...
    • 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, ...
    • Desarrollo de un demostrador para evaluar técnicas Cross-Layer en sistemas de comunicaciones inalámbricos 

      López López, Jose (Universitat Politècnica de Catalunya, 2008-06-11)
      Master thesis (pre-Bologna period)
      Open Access
      Este proyecto ha consistido en el desarrollo de una plataforma de pruebas (un demostrador), basado en el uso de unos módulos de transmisión-recepción con sensores incrustados (tecnología TELOS) llamados genéricamente ...