Exploració per tema "WLAN"

Ara es mostren els items 1-20 de 73

    • A compact dual-band planar monopole antenna using fractal rings and A Y-shaped feeding transmission line 

      Djafri, Kahina; Challal, Mouloud; Romeu Robert, Jordi (De Gruytr, 2018-01-01)
      Article
      Accés obert
      This paper presents a novel design approach of a compact dual-band monopole antenna with an overall size of 18.9x13x1.6mm3. The proposed antenna is composed of a fractal ring shaped patch fed by a Y-shaped transmission ...

    • 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
      Accés obert
      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 novel cheater and jammer detection scheme for IEEE 802.11-based wireless LANs 

      García Villegas, Eduard; Afaqui, Muhammad Shahwaiz; López Aguilera, M. Elena (2015-07-05)
      Article
      Accés obert
      The proliferation of IEEE 802.11 networks has made them an easy and attractive target for malicious devices/adversaries which intend to misuse the available network. In this paper, we introduce a novel malicious entity ...

    • 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)
      Comunicació de congrés
      Accés obert
      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)
      Text en actes de congrés
      Accés obert
      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)
      Text en actes de congrés
      Accés obert
      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 ...

    • ADAPT: An adaptive directional antenna protocol for medium access control in terahertz networks 

      Morales Brotons, Daniel (Universitat Politècnica de Catalunya, 2020-06)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   Northeastern University
      Terahertz (THz) band communications are emerging as a key technology for the next generation of wireless communications, with the potential to realize ultra-broadband Terabit-per-second (Tbps) links. However, the unique ...

    • Analysis of techniques for traffic optimization over satellite backhauling links 

      González Polo, Alvaro (Universitat Politècnica de Catalunya, 2013-10-21)
      Projecte/Treball Final de Carrera
      Accés obert
      [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 ...

    • Anàlisi de l'IEEE 802.11ax (Wi-Fi 6 i Wi-Fi 6E) 

      Delgado Garrido, Joel (Universitat Politècnica de Catalunya, 2023-10-30)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat
      This final degree thesis is an analysis of the IEEE 802.11ax standard and the two subsequent certifications, Wi-Fi 6 and Wi-Fi 6E, with the aim of obtaining information to understand these new IEEE 802.11 standards. We ...

    • 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)
      Projecte/Treball Final de Carrera
      Accés obert
      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)
      Treball Final de Grau
      Accés obert
      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)
      Report de recerca
      Accés obert
      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 ...

    • Avaluació de un mecanismo de agrupación de usuarios en redes Wi-Fi para IoT utilizando inteligencia artificial 

      López García, Alejandro (Universitat Politècnica de Catalunya, 2021-09-14)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat

    • Bezdrátové síte 

      Salazar Soler, Jorge (European Virtual Learning Platform for Electrical and Information Engineering, 2016-11-08)
      Llibre
      Accés obert
      Tento modul poskytuje aktuální prehled bezdrátových sítí s primárním zamerením na bezdrátové síte typu LAN. Popisuje a vysvetluje základy ruzných typu bezdrátových technologií užívaných u moderních komunikacních systému ...

    • Bezdrôtové siete 

      Salazar Soler, Jorge (European Virtual Learning Platform for Electrical and Information Engineering, 2016-06-11)
      Llibre
      Accés obert
      Tento modul predstavuje všeobecný úvod do problematiky bezdrôtových sietí a podrobnejšie lokálnych prístupových sietí LAN. Sú v nom opísané a vysvetlené rôzne existujúce bezdrôtové technológie, ich základné vlastnosti, ...

    • Channel assignment algorithms for OSA-Enabled WLANs exploiting prioritization and spectrum heterogeneity 

      Novillo Parales, Francisco Vicente; Ferrús Ferré, Ramón Antonio (2012-04)
      Article
      Accés restringit per política de l'editorial
      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)
      Treball Final de Grau
      Accés obert
      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)
      Treball Final de Grau
      Accés obert
      [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)
      Projecte Final de Màster Oficial
      Accés obert
      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 ...

    • Comunicación inalámbrica ultrarrápida optimización de persistencia en protocolos MAC para redes inalámbricas en chips 

      Barcia González, Alejandro (Universitat Politècnica de Catalunya, 2018-06)
      Treball Final de Grau
      Accés obert
      Persistence Optimization for MAC protocols in Wireless Networks on Chip.