Now showing items 1-20 of 45

  • A near-optimum cross-layered distributed queuing protocol for wireless LAN: medium access control protocols for wireless LANs 

    Alonso Zárate, Jesús; Verikoukis, Christos; Kartsakli, Elli; Cateura Díaz, Alejandro; Alonso Zárate, Luis Gonzaga (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2008-02)
    Article
    Open Access
    Distributed Queuing Collision Avoidance (DQCA) is a distributed MAC protocol for WLAN systems that offers near optimum performance. The protocol implements a reservation scheme that ensures collision-free data transmissions ...
  • A ranging method with IEEE 802.11 data frames for indoor localization 

    Ciurana Adell, Marc; Barceló Arroyo, Francisco; Izquierdo Moreno, Fernán (IEEE, 2007-03-15)
    Conference lecture
    Open Access
    IEEE 802.11 networks constitute a suitable infrastructure for accurate indoor positioning. However, existing approaches based on fingerprinting present drawbacks that make them not suitable for most of applications. This ...
  • 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 ...
  • 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 ...
  • Analysis of techniques for traffic optimization over satellite backhauling links 

    González Polo, Alvaro (Universitat Politècnica de Catalunya, 2013-10-21)
    Master thesis (pre-Bologna period)
    [ANGLÈS] In certain situations the operation of mobile operator infrastructure can be affected by natural disasters such as hurricanes, fires or earthquakes. This fact hinders optimum coordination of rescue actions and ...
  • Análisis de técnicas de acceso al medio avanzadas basadas en colas distribuidas y mecanismos Cross-Layer para sistemas de comunicaciones inalámbricas 

    Mohedano Troyano, Nadia (Universitat Politècnica de Catalunya, 2007-12-19)
    Master thesis (pre-Bologna period)
    Open Access
    El uso de las redes inalámbricas 802.11 está en continua expansión en la actualidad. Este hecho provoca que cada vez se requiera un mayor control para garantizar una cierta calidad de servicio (QoS) en diferentes ...
  • Authentication system deployment throughout protected access (UTM) for the Wireless Network in a hotel chain 

    Escolà Henke, Jean Miquel (Universitat Politècnica de Catalunya, 2011-10-08)
    Bachelor thesis
    Open Access
    A Hotel chain distributed over Europe wishes to provide wireless access to Internet for the hosted customers and offer an integral security through a Unified Threat Management ( UTM ) The project will consist; in one hand, ...
  • 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 assignment algorithms for OSA-Enabled WLANs exploiting prioritization and spectrum heterogeneity 

    Novillo Parales, Francisco Vicente; Ferrús Ferré, Ramón Antonio (2012-04)
    Article
    Restricted access - publisher's policy
    Allowing WLANs to exploit opportunistic spectrum access (OSA) is a promising approach to alleviate spectrum congestion problems in overcrowded unlicensed ISM bands, especially in highly dense WLAN deployments. In this ...
  • Characteristics and evaluation of IEEE 802.11n standard 

    Garcia Gil, Sergio (Universitat Politècnica de Catalunya, 2013-07-22)
    Bachelor thesis
    Open Access
    El objetivo de este trabajo final de carrera es caracterizar y evaluar las diferentes funcionalidades y mejoras que aporta el nuevo estándar IEEE 802.11n respecto a sus antecesores. Para ello se hace un estudio teórico ...
  • 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 ...
  • Characterizing WLAN channel occupancy for cognitive networking 

    Vizcaino Luna, Alexandre (Universitat Politècnica de Catalunya, 2012-07-30)
    Master thesis
    Open Access
    The deployment of heterogeneous wireless networks in the same spectrum space introduces the need for dynamic spectrum access so as to increase the utilization of the available wireless resources. Dynamic spectrum access ...
  • 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 ...
  • Cooperative Positioning Studies based on Wireless Local Area Networks (WLANs) 

    Caisaguano Vásquez, Tery Osmar (Universitat Politècnica de Catalunya, 2014-01-15)
    Master thesis (pre-Bologna period)
    Open Access
    [ANGLÈS] Location information and location-based service have gained importance in recent years because, based on their concept, a new business market has been opened which encompass emergency services, security, monitoring, ...
  • Cómo conocer el uso actual de las redes WLAN basadas en IEEE 802.11 

    Tena Carbonell, Xavier (Universitat Politècnica de Catalunya, 2013-12-04)
    Bachelor thesis
    Open Access
    The objectives of this work are the analysis of wireless networks based on IEEE 802.11a, 802.11b 802.11g and 802.11n standards. We study various parameters and characteristics to later carry out a statistical study on its ...
  • Design and implementation of a cognitive node for heterogeneous wireless ad-hoc 

    Serra Company, Fernando; López González, Javier; Ibáñez Vaquez, David; Rubio López, Javier (Universitat Politècnica de Catalunya, 2010-07-09)
    Master thesis (pre-Bologna period)
    Open Access
    In this thesis, the design of a cognitive network layer solution for a scenario with mobile devices is presented. Cognitive networks are able to sense the environment and adapt in order to find the best performance of the ...
  • Diseño y planificacion de la red de datos de un colegio con capacidad de 860 personas y 3060 m2 edificados 

    Domínguez Sagra, Verónica (Universitat Politècnica de Catalunya, 2011-03-25)
    Bachelor thesis
    Open Access
    El objetivo principal de este proyecto es realizar el diseño de de la red de voz y datos del colegio CEIP. Plaça dels Països Catalans., ubicado en Lleida. Inicialmente se han especificado los requisitos principales que ...
  • 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 ...
  • 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 ...
  • 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 ...