Now showing items 1-20 of 28

    • A Sigfox energy consumption model 

      Gómez Montenegro, Carlos; Veras Revelles, Juan Carlos; Vidal Ferré, Rafael; Casals Ibáñez, Lluís; Paradells Aspas, Josep (Multidisciplinary Digital Publishing Institute (MDPI), 2019-02-07)
      Article
      Open Access
      Sigfox has become one of the main Low-Power Wide Area Network (LPWAN) technologies, as it has attracted the attention of the industry, academy and standards development organizations in recent years. Sigfox devices, such ...
    • Achievable bandwidth estimation for stations in multi-rate IEEE 802.11 WLAN cells 

      García Villegas, Eduard; Viamonte Solé, David; Vidal Ferré, Rafael; Paradells Aspas, Josep (2007-04-16)
      Conference report
      Open Access
      This paper analyzes the effect of multi-rate transmissions in a CSMA wireless LAN environment. Observations in a real testbed showed that bandwidth resources (in Bytes/s) are shared fairly among all stations even though ...
    • An implementation of IoT LPWAN SCHC message fragmentation and reassembly 

      Wistuba, Diego; Céspedes, Sandra; Zúñiga, Juan Carlos; Muñoz Lara, Rodrigo; Aguilar Romero, Sergio; Gómez Montenegro, Carlos; Vidal Ferré, Rafael (CEUR-WS.org, 2020)
      Conference lecture
      Open Access
      This extended abstract reports about the implementation of the fragmentation and reassembly mechanisms of the SCHC framework for Low Power Wide Area Networks (LPWANs). The project aims to program the methods and routines ...
    • Channel management in a campus-wide WLAN with partially overlapping channels 

      Mengual Pérez, Ester; García Villegas, Eduard; Vidal Ferré, Rafael (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference lecture
      Restricted access - publisher's policy
      The 2.4 GHz ISM band is a battlefield where an increasingly large number of devices compete for the scarce frequency resources. IEEE 802.11 WLANs suffer the consequences of this overcrowded spectrum, especially in dense ...
    • Cooperative Load Balancing in IEEE 802.11 Networks with Cell Breathing 

      García Villegas, Eduard; Vidal Ferré, Rafael; Paradells Aspas, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2008-07-06)
      Conference report
      Open Access
      IEEE 802.11 WLANs (Wi-Fi) are widely deployed for providing Internet access in public spaces, known as Hot Spots. In these scenarios, users tend to be "gregarious” and essentially static. Since association and roaming ...
    • Creating digital awareness 

      Vidal Ferré, Rafael; Alcober Segura, Jesús Ángel; Cervelló Pastor, Cristina; Fernández Ferré, Mª Teresa; García Villegas, Eduard; Yúfera Gomez, José Manuel (2021)
      Conference report
      Open Access
      As a result of the world’s population being much more digitally connected, it is increasingly relevant to acquire an adequate level of digital awareness. For this reason, the objective of this work is to introduce the ...
    • Deploying large-scale IEEE802.11 networks using IP paging with link-specific capabilities : a standard compliant approach and its performance analysis 

      Vidal Ferré, Rafael; García Villegas, Eduard; Paradells Aspas, Josep (2010-03-18)
      Article
      Restricted access - publisher's policy
      IEEE802.11 is a layer two technology that offers limitedmobility support. It suffers from scalability problems caused by the performance of the mechanisms related to the address resolution and the discovery and maintenance ...
    • Despliegue de una WLAN en la EPSC 

      Vidal Ferré, Rafael; Bordoy Rodríguez, Xavier (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 2003)
      Article
      Open Access
    • Despliegue de WLANs en exteriores : desarrollo de una herramienta para la toma de medidas georeferenciadas 

      Porro Pérez, Alexis; Vidal Ferré, Rafael (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 2004)
      Article
      Open Access
    • Effect of adjacent-channel interference in IEEE 802.11 WLANs 

      García Villegas, Eduard; López Aguilera, M. Elena; Vidal Ferré, Rafael; Paradells Aspas, Josep (2007-06-03)
      Conference report
      Open Access
      Frequency channels are a scarce resource in the ISM bands used by IEEE 802.11 WLANs. Current radio resource management is often limited to a small number of nonoverlapping channels, which leaves only three possible channels ...
    • El protocol Mobile IP. La mobilitat a Internet (II Part) 

      Vidal Ferré, Rafael; Paradells Aspas, Josep; Casademont Serra, Jordi (2006-12)
      Article
      Open Access
    • El protocol Mobile IPv6. La mobilitat a Internet (i III Part) 

      Vidal Ferré, Rafael; Paradells Aspas, Josep; Casademont Serra, Jordi (2007-03)
      Article
      Open Access
    • Evaluation of receiver-feedback techniques for fragmentation over LPWANs 

      Aguilar Romero, Sergio; Vidal Ferré, Rafael; Gómez Montenegro, Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Article
      Open Access
      The Internet Engineering Task Force (IETF) has standardized a new framework for IPv6 support over Low Power Wide Area Networks (LPWANs), called Static Context Header Compression and Fragmentation (SCHC). SCHC includes ...
    • Examen parcial (Curs 2018-2019) 

      Rincón Rivera, David; Vidal Ferré, Rafael (Universitat Politècnica de Catalunya, 2019-04-04)
      Exam
      Restricted access to the UPC academic community
    • Examen parcial (Curs 2020-2021) 

      Vidal Ferré, Rafael (Universitat Politècnica de Catalunya, 2021-04-07)
      Exam
      Restricted access to the UPC academic community
    • IEEE Wireless LAN capacity in multicell environments with rate adaptation 

      García Villegas, Eduard; López Aguilera, M. Elena; Vidal Ferré, Rafael; Paradells Aspas, Josep (2007-06-16)
      Conference report
      Open Access
      Since the advent of the first IEEE 802.11 standard, many research efforts have been spent on evaluating different aspects of the specification. In this paper, we present a new method to predict the capacity of a multicell ...
    • La mobilitat a Internet (I Part) 

      Vidal Ferré, Rafael; Paradells Aspas, Josep; Casademont Serra, Jordi (2006-09)
      Article
      Open Access
    • Localización en redes WLAN 802.11: desarrollo e implementación de una solución basada en traps SNMP 

      García Villegas, Eduard; Vidal Ferré, Rafael (Universidad de Las Palmas de Gran Canaria, Servicio de Publicaciones, 2003-09)
      Conference report
      Open Access
      The growth of WLANs and hence, the increase of mobile data terminals, bring about a visible proliferation of location-based services. This scenario also carries the need for location management systems that are device ...
    • Modeling the energy performance of LoRaWAN 

      Casals Ibáñez, Lluís; Mir Masnou, Bernat; Vidal Ferré, Rafael; Gómez Montenegro, Carlos (MDPI AG, 2017-10-16)
      Article
      Open Access
      LoRaWAN is a flagship Low-Power Wide Area Network (LPWAN) technology that has highly attracted much attention from the community in recent years. Many LoRaWAN end-devices, such as sensors or actuators, are expected not to ...
    • New algorithm for distributed frequency assignments in IEEE 802.11 

      García Villegas, Eduard; Vidal Ferré, Rafael; Paradells Aspas, Josep (2007-02-28)
      Conference report
      Open Access
      The continuous growth of IEEE 802.11 wireless local area networks (WLAN) brings the benefit of a high speed wireless access to packet networks, such as Internet. But it also entails the successive appearance of new ...