Ara es mostren els items 1-20 de 38

  • Análisis del protocolo IEEE 802.11b en un entorno celular 

    López Aguilera, M. Elena; Casademont Serra, Jordi; Rojas Espinosa, Alfonso (Universidad de Las Palmas de Gran Canaria, Servicio de Publicaciones, 2003)
    Text en actes de congrés
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    In this paper we present an analysis of the protocol IEEE 802.11b in different environments. Its performance in an indoor environment is evaluated, in terms of throughput and transmission delay, and the influence of the ...
  • A study on the influence of transmission errors on WLAN 802.11 MAC performance 

    López Aguilera, M. Elena; Casademont Serra, Jordi; García Villegas, Eduard (2010)
    Article
    Accés restringit per política de l'editorial
    Since the advent of the first IEEE 802.11 standard for WLANs, several papers have been presented that evaluate the IEEE 802.11 DCF access method. In realistic WLAN environments frame errors usually occur due to non-ideal ...
  • 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
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    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 ...
  • Cálculo de las prestaciones de un sistema de telefonía móvil celular DCA con técnicas de mejora de capacidad 

    Casademont Serra, Jordi (Universitat Politècnica de Catalunya, 1998-01-23)
    Tesi
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    El objetivo que ha motivado esta tesis ha sido el analizar y proponer mecanismos para incrementar la capacidad de tráfico de un sistema de acceso radio DECT (Digital Enhanced Cordless Telecommunications) en entornos de ...
  • 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)
    Text en actes de congrés
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    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 ...
  • Design, development and performance evaluation of a low-cost, Low-power wake-up radio system for WSN 

    Oller Bosch, Joaquim; Seyfettin Demirkol, Ilker; Casademont Serra, Jordi; Paradells Aspas, Josep (2013-11-01)
    Article
    Accés restringit per política de l'editorial
    Energy-efficient operation is a challenge for wireless sensor networks (WSNs). A common method employed for this purpose is duty-cycled operation, which extends battery lifetime yet incurs several types of energy wastes ...
  • 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)
    Text en actes de congrés
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    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 ...
  • El protocol Mobile IP. La mobilitat a Internet (II Part) 

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

    Vidal Ferré, Rafael; Paradells Aspas, Josep; Casademont Serra, Jordi (2007-03)
    Article
    Accés obert
  • Energy efficient wireless networking of sensor nodes 

    Seyfettin Demirkol, Ilker; Paradells Aspas, Josep; Oller Bosch, Joaquim; Casademont Serra, Jordi; Calveras Augé, Anna M.; Catalán Cid, María Luisa (2013)
    Text en actes de congrés
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    Wireless sensor networks have paved the way to a new era in user applications, where information can be sensed, processed, and distributed from remote environments with minimal or no human interaction. As the sensor nodes ...
  • 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)
    Text en actes de congrés
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    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 ...
  • Evaluación de IEEE 802.11g en un entorno celular exterior 

    López Aguilera, M. Elena; Casademont Serra, Jordi; Cotrina Navau, Josep (2004-11)
    Text en actes de congrés
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    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 ...
  • Evaluating wireless LAN access methods in presence of transmission errors 

    López Aguilera, M. Elena; Heusse, Martin; Rousseau, Franck; Duda, Andrzej; Casademont Serra, Jordi (Institute of Electrical and Electronics Engineers, 2006-04)
    Text en actes de congrés
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    Several modifications of the IEEE 802.11 DCF access method have been proposed recently to improve the performance of wireless LANs. Up to now, such proposals have only been compared under ideal channel conditions. In this ...
  • Evaluation of IEEE 802.11 coexistence in WLAN deployments 

    López Aguilera, M. Elena; García Villegas, Eduard; Casademont Serra, Jordi (Springer, 2017-06-17)
    Article
    Accés obert
    Wi-Fi has become a successful technology since the publication of its first WLAN standard due to continuous advances and updates while remaining always backwards compatible. Backwards compatibility among subsequent standards ...
  • Forwarding techniques for IP fragmented packets in a real 6LoWPAN network 

    Ludovici, Alessandro; Calveras Augé, Anna M.; Casademont Serra, Jordi (2011-01-18)
    Article
    Accés obert
    Wireless Sensor Networks (WSNs) are attracting more and more interest since they offer a low-cost solution to the problem of providing a means to deploy large sensor networks in a number of application domains. We believe ...
  • Has time come to switch from duty-cycled MAC protocols to wake-up radio for wireless sensor networks? 

    Oller, Joaquim; Seyfettin Demirkol, Ilker; Casademont Serra, Jordi; Paradells Aspas, Josep; Gamm, Gerd Ulrich; Reindl, Leonhard Michael (2016-04-01)
    Article
    Accés obert
    Duty-cycled Medium Access Control (MAC) protocols certainly improve the energy efficiency of wireless networks. However, most of these protocols still suffer from severe degrees of overhearing and idle listening. These two ...
  • IEEE 802.11-enabled wake-up radio system: design and performance evaluation 

    Oller Bosch, Joaquim; García Villegas, Eduard; López Aguilera, M. Elena; Seyfettin Demirkol, Ilker; Casademont Serra, Jordi; Paradells Aspas, Josep; Gamm, Gerd Ulrich; Reindl, Leonhard Michael (Institution of Electrical Engineers, 2014-09-25)
    Article
    Accés obert
    Today, the vast majority of personal communication devices, such as laptops, smartphones, and logically wireless fidelity (Wi-Fi) access points feature IEEE 802.11 chipsets. In turn, wake-up radio (WuR) systems are used ...
  • 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)
    Text en actes de congrés
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    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 ...
  • Impacto de mecanismos de seguridad en sensores IEEE 802.15.4 

    Tripp Barba, Carolina; Casademont Serra, Jordi (2009-09-15)
    Text en actes de congrés
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    En la actualidad son muchos los mecanismos de seguridad que el estándar IEEE 802.15.4 permite a las redes inalámbricas de sensores [1] Dicho estándar define las especificaciones de la Capa de Acceso al Medio y la Capa ...
  • Integración de sistemas de comunicaciones móviles inalámbricas en una plataforma GIS 

    Casademont Serra, Jordi; López Aguilera, M. Elena; Paradells Aspas, Josep (2002)
    Text en actes de congrés
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    El artículo presenta una nueva plataforma desarrollada para la comercialización de servicios avanzados de información geográfica para uso en dispositivos portátiles. La plataforma utiliza las redes de telecomunicación ...