Now showing items 1-20 of 34

  • A channel allocation algorithm for OSA-Enabled IEEE 802.11 WLANs 

    Novillo Parales, Francisco Vicente; Churchman, Mathew; Ferrús Ferré, Ramón Antonio; Agustí Comes, Ramon (2009)
    Conference report
    Open Access
    Channel allocation problem is a major challenge in wireless local area networks (WLANs), especially in dense deployments of access points (APs) where congestion of the unlicensed spectrum bands (i.e., ISM bands) could ...
  • A transmit power control proposal for IEEE 802.11 cellular networks 

    López Aguilera, M. Elena; Casademont Serra, Jordi (Institute of Electrical and Electronics Engineers, 2006-05)
    Conference report
    Open Access
    Actually, the idea of designing an outdoor cellular network based on WLAN IEEE 802.11 results very attractive, due to the several advantages that this technology presents. It offers the equipment at a lower cost, operates ...
  • Available Admission Capacity Estimations in IEEE 802.11 Access Points 

    García Villegas, Eduard (2008-04-01)
    External research report
    Open Access
    This technical report is intended to provide extended information about the Available Admission Capacity estimation mechanism for IEEE 802.11 cells previously presented. The original formulation has been revised in this ...
  • Channel access unfairness of wireless LAN access methods 

    López Aguilera, M. Elena; Heusse, Martin; Rousseau, Franck; Duda, Andrzej; Casademont Serra, Jordi (Institute of Electrical and Electronics Engineers, 2006-06)
    Conference report
    Open Access
    In this paper, we present an evaluation of chosen wireless LAN access methods involving stations with different bit error rates: n - 1 stations in ideal transmission conditions (BER = 0) and 1 station with a given bit error ...
  • Characterization of reconfigurable antennas in real Wifi environments 

    Castellanos de Rojas, Adrian (Universitat Politècnica de Catalunya, 2015-02-03)
    Bachelor thesis
    Open Access
    [ANGLÈS] The purpose of this project is to characterize two reconfigurable microstrip antennas at 5 GHz against the common Wifi monopole, by measuring them in real Wifi environments. From the measurements, conclusions on ...
  • Desenvolupament d'una plataforma basada en Android d'accés a dades en edificis en cas d'emergència 

    Bestard Martí, Jaume (Universitat Politècnica de Catalunya, 2013-07-25)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    [ANGLÈS] This project aims to address the creation of an application targeted for mobile platforms to access important information on emergency scenarios. This application will enable the person who uses it to get a quick ...
  • Design of a UMTS/GPRS Assisted Mesh Network (UAMN) 

    Paradells Aspas, Josep; Ferrer, Josep Lluís; Catalán Cid, María Luisa; Torres, Wilfredo; Catalán Cid, Miguel; Sánchez Loro, Xavier; Beltrán Martínez, María Victoria; García Villegas, Eduard; Gómez C.; Plans, Pau; Rubio, Javier; Almodóvar, Daniel; Rodellar, Daniel; Subotic, N.; Wenger, D.; Steiner, I. (Wireless World Research Forum, 2006-11-15)
    Conference report
    Open Access
    Wireless Mesh or multi-hop networks (WMNs) are well known thanks to its simplicity on deployment and the lack of infrastructure. These two advantages come with some drawbacks. WMNs have limitations with the support of ...
  • Detecting and mitigating the impact of wideband jammers in IEEE 802.11 WLANs 

    García Villegas, Eduard; Gómez, Moisés; López Aguilera, M. Elena; Casademont Serra, Jordi (2010)
    Conference report
    Open Access
    IEEE 802.11 Wireless LANs (WLANs) are highly sensitive to Denial of Service (DoS) attacks carried out with jamming devices. In this paper we focus on 2.4GHz wideband constant jammers. The interest in the wideband jammer ...
  • Disseny d’una aplicació sobre terminals mòbils per a la localització d’usuaris en xarxes Wi-Fi 

    Grau Muñoz, Mercè (Universitat Politècnica de Catalunya, 2012-01-25)
    Bachelor thesis
    Open Access
    Aquest document explica el disseny i la implementació d’un projecte que ofereix localització a terminals mòbils per via Wi-Fi. El sistema consta de dues parts: un terminal mòbil i un servidor, però aquí només es desenvolupa ...
  • Disseny d’un sistema de localització d’usuaris en xarxes Wi-Fi 

    Lari Jarque, Marc (Universitat Politècnica de Catalunya, 2012-01-26)
    Bachelor thesis
    Open Access
    En els últims anys, la localització ha passat a ser un servei molt sol•licitat per a la població. S’utilitzen els navegadors o terminals mòbils per traçar rutes o itineraris, o bé per saber en la posició en què un es troba. ...
  • Dual-band planar quadrature hybrid with enhanced bandwidth response 

    Collado Gómez, Juan Carlos; Grau Besolí, Alfred; Flaviis, Franco de (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-01-31)
    Article
    Open Access
    This paper presents the theory, design procedure, and implementation of a dual-band planar quadrature hybrid with enhanced bandwidth. The topology of the circuit is a three-branch-line (3-BL) quadrature hybrid, which ...
  • Energy efficient algorithm and DTN implementations in MANETs 

    López Lenguas, Alex (Universitat Politècnica de Catalunya, 2013-07-24)
    Master thesis (pre-Bologna period)
    Open Access
    [ANGLÈS] Disaster and military communication scenarios are very challenging for today telecommunication technologies. The lack of infrastructure, the jamming and disconnections that present these scenarios requires improved ...
  • Energy-efficient media content storage and distribution 

    Grau Miró, Josep (Universitat Politècnica de Catalunya, 2013-06)
    Master thesis (pre-Bologna period)
    Open Access
    Covenantee:  Lunds universitet
    [ANGLÈS] Internet is a tool that today has become indispensable in our lives. Its use has become a fact so important that this network infrastructure deployed today requires a lot of energy to make it work. Depending what ...
  • Enhancement proposal for WLAN IEEE 802.11e: desynchronization of its working procedure 

    López Aguilera, M. Elena; Casademont Serra, Jordi; Cotrina Navau, Josep; Rojas Espinosa, Alfonso (Institute of Electrical and Electronics Engineers, 2005)
    Conference report
    Open Access
    Up to the present, several studies have been performed in order to provide prioritization of stations or classes of service for WLAN IEEE 802.11. The IEEE 802.11e draft specification aims to extend the original IEEE 802.11 ...
  • Estudi del consum energètic relatiu a la gestió de la mobilitat i el trànsit broadcast i multicast en xarxes WiFi 

    Blanco Sastre, Ignasi (Universitat Politècnica de Catalunya, 2010-05-03)
    Bachelor thesis
    Open Access
  • Estudio de la escalabilidad de técnicas de localización basadas en tiempos de ida y vuelta en redes IEEE 802.11 

    Lonigro, Angela (Universitat Politècnica de Catalunya, 2011-09-30)
    Master thesis (pre-Bologna period)
    Open Access
    English: TOA-based location techniques over wireless communication networks constitute a promising technology for providing location based services in areas where GPS is not completely available. Most of the implementations ...
  • Estudio de modelos de movimiento en interiores para aplicación en entornos WLAN 

    Roldán Bravo, Alfonso (Universitat Politècnica de Catalunya, 2007-12-14)
    Master thesis (pre-Bologna period)
    Open Access
    El patrón de movimiento de los usuarios juega un papel importante en el análisis de las redes móviles e inalámbricas, por ejemplo, en el análisis de algoritmos y protocolos en redes wireless de área local (WLAN). Para ...
  • Evaluación de IEEE 802.11g en un entorno celular exterior 

    López Aguilera, M. Elena; Casademont Serra, Jordi; Cotrina Navau, Josep (2004-11)
    Conference report
    Open Access
    La mayoría de estudios que se encargan de analizar el comportamiento de IEEE 802.11 se encuentran limitados a entornos unicelulares. Sin embargo, la idea de diseñar una red celular basada en IEEE 802.11 resulta muy ...
  • Evaluación de un sistema de posicionamiento pasivo basado en IEEE 802.11 en zonas sin cobertura 2-way TOA 

    Malpartida Tablado, Marta (Universitat Politècnica de Catalunya, 2012-07-02)
    Master thesis (pre-Bologna period)
    Open Access
    En este proyecto se evalúa el comportamiento del algoritmo passive-TDOA en zonas de oscuridad, es decir en aquellas zonas en las que no es posible la localización del usuario utilizando el sistema 2-way TOA, al disponer ...
  • IEEE 802.11g performance in presence of beacon control frames 

    López Aguilera, M. Elena; Casademont Serra, Jordi; Cotrina Navau, Josep (Institute of Electrical and Electronics Engineers, 2004-09)
    Conference report
    Open Access
    Most studies of the performance of IEEE 802.11 consider scenarios of ad-hoc topology networks and do not contemplate the network broadcast information contained in beacon frames. The paper presents a study of the performance ...