Graphic summary
  • Show / hide key
  • Information


Scientific and technological production
  •  

1 to 39 of 39 results
  • Intelligent Channel Bonding in 802.11n WLANs

     Deek, Lara; Garcia Villegas, Eduard; Belding, Elizabeth; Lee, Sung-Ju; Almeroth, Kevin
    IEEE transactions on mobile computing
    Date of publication: 2013-06-11
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The IEEE 802.11n standard defines channel bonding that allows wireless devices to operate on 40MHz channels by doubling their bandwidth from standard 20MHz channels. Increasing channel width increases capacity, but it comes at the cost of decreased transmission range and greater susceptibility to interference. However, with the incorporation of Multiple-Input Multiple-Output (MIMO) technology in 802.11n, devices can now exploit the increased transmission rates from wider channels with minimal sacrifice to signal quality and range. The goal of our work is to identify the network factors that influence the performance of channel bonding in 802.11n networks and make intelligent channel bonding decisions. We discover that channel width selection should consider not only a link's signal quality, but also the strength of neighboring links, their physical rates, and interferer load. We use our findings to design and implement a network detector that successfully identifies interference conditions that affect channel bonding decisions in 100% of our test cases. Our detector can form the foundation for more robust and accurate algorithms that can adapt bandwidth to variations in channel conditions. Our findings allows us to predict the impact of network conditions on performance and make channel bonding decisions that maximize throughput.

  • Channel management in a campus-wide WLAN with partially overlapping channels

     Mengual Pérez, Ester; Garcia Villegas, Eduard; Vidal Ferre, Rafael
    IEEE International Symposium on Personal Indoor and Mobile Radio Communications
    Presentation's date: 2013-09-10
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    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 scenarios where the performance of those WLAN cells is way below the expected in ideal conditions. The harmful effects of interference can be minimized if an intelligent frequency management is implemented. In this paper, we first detail the implementation of a dynamic channel assignment solution which considers partially overlapping channels, and then we show, through measurements in a real campus-wide scenario with near 200 APs and under real traffic conditions, how this approach improves the performance of the traditional three orthogonal channels (i.e. 1, 6 and 11)

  • Uso de canales solapados en una red de área de campus inalámbrica con IEEE 802.11

     Mengual Pérez, Ester; Garcia Villegas, Eduard; Vidal Ferre, Rafael
    Jornadas de Ingeniería Telemática
    Presentation's date: 2013-10-29
    Presentation of work at congresses

    Read the abstract Read the abstract  Share Reference managers Reference managers Open in new window

    Las redes de área local inalámbricas (WLAN) basadas en la familia de estándares IEEE 802.11 utilizan mayoritariamente la banda industrial científica y médica (ISM) de 2,4GHz en la que compiten con un número cada vez mayor de dispositivos. En aquellos escenarios con una mayor densidad de puntos de acceso, esta situación puede derivar en un rendimiento de las celdas WLAN por debajo sus expectativas en condiciones ideales. En este artículo se estudia un escenario real de este tipo: un campus universitario con cerca 200 puntos de acceso y bajo condiciones de tráfico real. En primer lugar, se seleccionan y determinan una serie de parámetros radio con el fin de caracterizar el escenario en términos de carga e interferencias. Este objetivo se consigue a partir de la interacción con las herramientas de gestión de la propia red. A continuación, se implementa una solución de asignación de canales dinámica que interacciona con las mencionadas herramientas de gestión. La gestión de canales implementada se basa en un algoritmo resultado de investigaciones anteriores que, como aspecto novedoso, tiene en cuenta los canales solapados parcialmente. Para terminar, se presentan una serie de pruebas obtenidas del escenario real que permiten demostrar cómo esta aproximación mejora el rendimiento de la tradicional asignación con tres canales ortogonales (i.e. 1, 6 y 11).

  • Joint rate and channel width adaptation for 802.11 MIMO wireless networks

     Deek, Lara; Garcia Villegas, Eduard; Belding, Elizabeth; Lee, Sung-Ju; Almeroth, Kevin
    IEEE International Conference on Sensing Communication and Networking
    Presentation's date: 2013-06-25
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The emergence of MIMO antennas and channel bonding in 802.11n wireless networks has resulted in a huge leap in capacity compared with legacy 802.11 systems. This leap, however, adds complexity to selecting the right transmission rate. Not only does the appropriate data rate need to be selected, but also the MIMO transmission technique (e.g., Spatial Diversity or Spatial Multiplexing), the number of streams, and the channel width. Incorporating these features into a rate adaptation (RA) solution requires a new set of rules to accurately evaluate channel conditions and select the appropriate transmission setting with minimal overhead. To address these challenges, we propose ARAMIS (Agile Rate Adaptation for MIMO Systems), a standard-compliant, closed-loop RA solution that jointly adapts rate and bandwidth. ARAMIS adapts transmission rates on a per-packet basis; we believe it is the first 802.11n RA algorithm that simultaneously adapts rate and channel width. We have implemented ARAMIS on Atheros-based devices and deployed it on our 15-node testbed. Our experiments show that ARAMIS accurately adapts to a wide variety of channel conditions with negligible overhead. Furthermore, ARAMIS outperforms existing RA algorithms in 802.11n environments with up to a 10 fold increase in throughput.

  • The impact of channel bonding on 802.11n network management

     Deek, Lara; Garcia Villegas, Eduard; Belding, Elizabeth; Lee, Sung-Ju; Almeroth, Kevin
    ACM/SIGCOMM International Conference on Emerging Networking Experiments and Technologies
    Presentation's date: 2011-12-07
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The IEEE 802.11n standard allows wireless devices to operate on 40MHz-width channels by doubling their channel width fromstandard 20MHz channels, a concept called channel bonding. Increasing channelwidth should increase bandwidth, but it comes at the cost of decreased transmission range and greater susceptibility to interference. However, with the incorporation of MIMO Multiple-Input Multiple-Output) technology in 802.11n, devices can now exploit the increased transmission rates from wider channels at a reduced sacrifice to signal quality and range. The goal of our work is to understand the characteristics of channel bonding in 802.11n networks and the factors that influence that behavior to ultimately be able to predict behavior so that network performance is maximized. We discuss the impact of channel bonding choices as well as the effects of both cochannel and adjacent channel interference on network performance. We discover that intelligent channel bonding decisions rely not only on a link’s signal quality, but also on the strength of neighboring links and their physical rates.

  • Access to the full text
    Detecting and mitigating the impact of wideband jammers in IEEE 802.11 WLANs  Open access

     Garcia Villegas, Eduard; Gómez, Moisés; Lopez Aguilera, Maria Elena; Casademont Serra, Jordi
    International Wireless Communications and Mobile Computing Conference
    Presentation of work at congresses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    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 lies in the fact that it beats all possible channels at the same time, leaving no possible escape following traditional channel-switching defenses. After studying and developing an effective detection mechanism, we propose the implementation of a load balancing technique based on cell breathing for mitigating the harmful effects of the jammer over an IEEE 802.11 WLAN. Cell breathing is achieved by dynamically tuning the transmission power to adjust the size of a WLAN cell.

  • Self-optimzation of radio resources on IEEE 802.11 networks  Open access

     Garcia Villegas, Eduard
    Defense's date: 2010-02-18
    Department of Telematics Engineering, Universitat Politècnica de Catalunya
    Theses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    Les xarxes d'àrea local sense fils (WLANs), principalment les basades en les diverses versions de les normes IEEE 802.11, i més concretament, aquelles operant en mode infraestructura (ús de punts d'accés o APs), són avui dia les tecnologies més populars per a l'accés ràdio de banda ampla a xarxes IP, ja sigui per a estendre petites xarxes LAN domèstiques (SOHO), o per a proporcionar accés d'Internet en espais públics. A més, amb l'arribada de productes amb el certificat Wi-Fi, els diferents fabricants de dispositius WLAN proporcionen un alt nivell d'interoperabilitat.No obstant això, la creixent densitat de punts d'accés WLAN ha començat a revelar els efectes negatius i les deficiències de les normes IEEE 802.11 inicials. Un dels factors clau del seu èxit, l'ús de la bandes de freqüència lliures (bandes ISM), és al mateix temps un dels seus grans inconvenients. Aquestes freqüències són de lliure accés al públic en general, i es defineixen dins d'una petita porció de l'espectre. En conseqüència, són generalment compartides entre diversos usuaris, dispositius de tecnologies diferents, etc.. A més, el control d'accés al medi definit per l'IEEE 802.11 (CSMA, o "escoltar abans de parlar") requereix una atenció especial a tots els problemes sorgits al voltant de les interferències.En aquest escenari, les xarxes WLAN IEEE no estan en condicions d'arribar a explotar tot el seu potencial. Malgrat aquest fet, unes polítiques intel·ligents sobre la gestió dels recursos ràdio (RRM) poden ajudar a reduir al mínim els efectes perjudicials de les interferències i d'una distribució desigual de la càrrega oferta. En aquesta tesi, es demostra que els mecanismes de RRM eficients són capaços de millorar notablement el rendiment d'una WLAN basada en l'IEEE 802.11.Aquesta tesi estudia la forma d'entendre els problemes de rendiment que són endèmics en les WLANs IEEE 802.11, així com les formes de minimitzar aquests efectes negatius per mitjà de la gestió de recursos ràdio. De fet, aquests problemes no són nous i han estat àmpliament estudiats des de l'aparició de xarxes de comunicacions mòbils, però les característiques particulars de les xarxes WLAN 802,11 requereixen nous enfocaments.Els mecanismes RRM en l'àmbit de les xarxes WLAN IEEE 802.11 són bàsicament destinats a reduir el grau de contenció i la interferència. Aquesta reducció es tradueix en una millor qualitat d'experiència (QoE), d'acord amb la percepció dels usuaris. Amb aquesta finalitat, RRM ha de proporcionar mecanismes eficients d'assignació de canals, algoritmes de selecció de modulació, control de potència i repartiment de càrrega. Atesa la naturalesa dinàmica de la propagació ràdio, i a causa de la mobilitat dels usuaris, els paràmetres que defineixen l'entorn sense fils varien amb el temps. Llavors, per tal de mantenir el rendiment en nivells acceptables, s'han de trobar mecanismes RRM que permetin una reconfiguració automàtica i dinàmica de la xarxa en resposta als canvis en el medi. En resum, podem construir el nostre escenari d'interès a partir de dispositius Wi-Fi intel·ligents capaços de cooperar, ja sigui de forma centralitzada o distribuïda, per tal de fer un millor ús dels minsos recursos ràdio.La nostra contribució als mecanismes RRM en xarxes WLAN s'inicia amb l'estudi i la caracterització de la interferència en l'àmbit particular de les xarxes IEEE 802.11. A continuació, desenvolupem un model de capacitat per a grans xarxes WLAN multi cel·la que té en compte tant l'efecte de la càrrega de la xarxa, com el de les interferències entre cel·les. El model també inclou l'efecte de l'adaptació automàtica de modulació que porten a terme molts dispositius. Aquestes estimacions de la capacitat són útils per a avaluar els beneficis d'un mecanisme RRM. Per exemple, aquestes estimacions són la base sobre la qual desenvolupem una innovadora solució per a la gestió de freqüències. Aquest mecanisme d'assignació de freqüències fa ús de tot l'espectre disponible (tant si es tracta de canals ISM solapats o no), ja que té en compte els efectes dels dos tipus d'interferència que trobem en xarxes IEEE 802.11: co-canal i per canal adjacent. Per tal de fer front a una distribució desigual de la càrrega, fet que es dóna típicament en els anomenats hotspots, es proposen dos mecanismes de repartiment de càrrega (un cop definit el concepte de càrrega): un enfocament distribuït gestionat per les estacions client, i un mecanisme de "cell breathing".Tots aquests mecanismes han de ser integrats en una arquitectura de gestió aglutinadora. En aquest sentit, s'han desenvolupat dues arquitectures de RRM: una arquitectura centralitzada, com a part del projecte UAMN, i un sistema distribuït.

    WLANs, primarily the various versions of IEEE 802.11 standards, and more precisely, those operating in infrastructure mode, are nowadays the most popular technologies for providing broadband radio access to IP networks, whether to extend Small Office/Home Office (SOHO) network LANs or to provide Internet access in public places. Moreover, with the advent of Wi-Fi certified products, different competitive brands of WLAN devices are interoperable at a basic level of service.However, the increasing density of WLAN access points has started to reveal the negative effects and shortcomings of the original IEEE 802.11 standards. One of its key success factors, the use of unlicensed Industrial Scientific Medical (ISM) frequency bands, is at the same time one of its major drawbacks. These frequencies are freely available to the general public. On the other hand, such frequencies are defined within a small portion of the spectrum and are usually shared among several users. Besides, the medium access defined by the IEEE 802.11 (CSMA, or "listen before talk") requires a special attention to all interference issues.In this scenario, IEEE WLANs are unable to exploit all their potential. However, intelligent radio resource management (RRM) policies could be applied to minimize the harmful effects of interference and an uneven load distribution. Throughout this dissertation, it is shown that efficient RRM mechanisms are able to improve notably the performance of a legacy IEEE WLAN.This thesis explores ways of understanding the performance issues that are endemic to IEEE 802.11 WLANs, as well as ways of minimizing these negative effects by means of radio resource management. In fact, these problems are not new and have been studied extensively since the advent of mobile communications networks, but the particular characteristics of the 802.11 WLANs require new approaches.RRM mechanisms in the field of IEEE 802.11 WLANs are basically intended to reduce contention and interference. This reduction is translated into an improved Quality of Experience (QoE), as perceived by the users. To this end, RRM should provide efficient channel allocation mechanisms, modulation selection algorithms, power control and load balancing. Given the dynamic nature of radio propagation, and due to user mobility, the parameters that define the wireless environment vary in time. Therefore, in order to maintain the required performance, we should find mechanisms that allow a dynamic and automatic reconfiguration of the network in response to the changes in the environment. To sum up, we build our scenario of interest with intelligent Wi-Fi devices capable of cooperating either in a centralized or a distributed manner, in order to make a better use of the shared and scarce radio resources.Our contribution to RRM on WLANs starts with the study and characterization of interference in the particular field of IEEE 802.11 networks. Following, we develop a capacity model for large WLAN deployments that takes both the effect of carried traffic and inter-cell interference into account. The model also includes the effect of rate adaptation. These capacity estimations are useful to evaluate the benefits of a RRM mechanism, for example, it was used as the metric observed by a frequency management approach. This frequency assignment mechanism makes use of all the available spectrum (overlapping and non-overlapping ISM channels), since it takes the effects of both co-channel and adjacent-channel interference into account. In order to cope with the uneven load distribution usually found on hot-spots, two load balancing mechanisms are proposed after defining the concept of load: a client-driven approach, and a cell-breathing mechanism. All these mechanisms need to be integrated into a single architecture. In this regard, two radio resource management architectures are developed: a centralized architecture, as part of the UAMN project, and a distributed scheme.

  • NUEVAS ARQUITECTURAS PARA INTERNET UBICUA: DISEÑO Y EVALUACION

     Vidal Ferre, Rafael; Casals Ibañez, Lluis; Paradells Aspas, Jose; Casademont Serra, Jordi; Cotrina Navau, Josep; Gomez Montenegro, Carlos; Lopez Aguilera, Maria Elena; Garcia Villegas, Eduard; Calveras Auge, Ana M.
    Participation in a competitive project

     Share

  • Redes de comunicaciones: de la telefonía móvil a Internet

     Beltran, Victoria; Calveras Auge, Ana M.; Casademont Serra, Jordi; Casals Ibañez, Lluis; Catalan Cid, Maria Luisa; Catalan Cid, Miguel; Garcia Villegas, Eduard; Gomez Montenegro, Carlos; Hesselbach Serra, Xavier; Lopez Aguilera, Maria Elena; Paradells Aspas, Jose; Sánchez Loro, Xavier; Vidal Ferre, Rafael
    Date of publication: 2010-12-01
    Book

     Share Reference managers Reference managers Open in new window

  • A study on the influence of transmission errors on WLAN 802.11 MAC performance

     Lopez Aguilera, Maria Elena; Casademont Serra, Jordi; Garcia Villegas, Eduard
    Wireless communications and mobile computing
    Date of publication: 2010
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    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 channel conditions; in this way, papers including adverse transmission conditions in the evaluation have been published later in the literature. In this paper, we review existent analytical models that include the influence of transmission errors in IEEE 802.11 DCF performance. We modify current models and provide a more accurate analysis, thus allowing the evaluation in single rate and multi-rate scenarios with stations subject to different link error conditions. Moreover, this paper exposes the unfairness problem that arises in IEEE 802.11 DCF networks with stations subject to different transmission conditions through analytical and simulation results. Stations are not able to distinguish collisions from failed transmissions due to link errors; both result in a missing ACK and, consequently, the transmitting stations apply the exponential backoff algorithm. This fact leads to a lower performance for stations in worse transmission conditions. Copyright © 2010 JohnWiley & Sons, Ltd.

  • Deploying large-scale IEEE802.11 networks using IP paging with link-specific capabilities : a standard compliant approach and its performance analysis

     Vidal Ferre, Rafael; Garcia Villegas, Eduard; Paradells Aspas, Jose
    Wireless personal communications
    Date of publication: 2010-03-18
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    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 of the path information. In this paper, we propose using IP paging with link-specific capabilities to solve this problem. The need of these capabilities is justified showing the limitations of pure-IP solutions when they interact with IEEE802.11 specific functions, mainly the power save mode (PSM). Then, a comprehensive proposal for an IP paging solution that is an extension of the Mobile IPv4 Regional Registration (MIPv4-RR) protocol is presented. Its strengths lie in the fact that there are no interaction problems with PSM, and it is fully compliant with existing IEEE802.11 devices. Finally, in order to show the excellent scalability of our link-specific solution, we carry out an analytical study of its mobility signaling and compare it with the standard MIPv4-RR protocol and IIPP (Integrated IP Paging Protocol), another IP paging solution that does not implement link-specific functions.

  • Frequency assignments in IEEE 802.11 WLANs with efficient spectrum sharing

     Garcia Villegas, Eduard; Vidal Ferre, Rafael; Paradells Aspas, Jose
    Wireless communications and mobile computing
    Date of publication: 2008-09
    Journal article

     Share Reference managers Reference managers Open in new window

  • Client-driven load balancing through association control in IEEE 802.11 WLANs

     Garcia Villegas, Eduard; Lopez Aguilera, Maria Elena; Vidal Ferre, Rafael; Paradells Aspas, Jose
    European transactions on telecommunications
    Date of publication: 2008-10
    Journal article

     Share Reference managers Reference managers Open in new window

  • Infopoints2

     Casademont Serra, Jordi; Paradells Aspas, Jose; Garcia Villegas, Eduard
    Participation in a competitive project

     Share

  • Cooperative load balancing in IEEE 802.11 networks with cell breathing

     Garcia Villegas, Eduard; Vidal Ferre, Rafael; Paradells Aspas, Jose
    IEEE Symposium on Computers and Communications
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • IEEE Wireless LAN capacity in multicell environments with rate adaptation

     Garcia Villegas, Eduard; Lopez Aguilera, Maria Elena; Vidal Ferre, Rafael; Paradells Aspas, Jose
    Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Red Mallada Asistida por UMTS/GPRS

     Paradells Aspas, Jose; Catalan Cid, Maria Luisa; Ferrer, J L; Catalán-Cid, M; Sánchez, X; Beltran Querol, Vicenç; Gomez Montenegro, Carlos; Plans, P; Garcia Villegas, Eduard
    Jornadas de Ingeniería Telemática
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Effect of adjacent-channel interference in IEEE 802.11 WLANs

     Garcia Villegas, Eduard; Lopez Aguilera, Maria Elena; Vidal Ferre, Rafael; Paradells Aspas, Jose
    Second International Conference on Cognitive Radio Oriented Wireless Networks and Communications
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Segur@

     Paradells Aspas, Jose; Casademont Serra, Jordi; Garcia Villegas, Eduard; Gomez Montenegro, Carlos
    Participation in a competitive project

     Share

  • Red mallada asistida por UMTS/GPRS

     Paradells Aspas, Jose; Catalan Cid, Maria Luisa; Ferrer, J L; Sanchez, X; Beltran Querol, Vicenç; Gomez Montenegro, Carlos; Plans, P; Garcia Villegas, Eduard
    Jornadas de Ingeniería Telemática
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Achievable Bandwidth Estimation for Stations in Multi-Rate IEEE 802.11 WLAN Cells

     Garcia Villegas, Eduard; Viamonte, D; Vidal Ferre, Rafael; Paradells Aspas, Jose
    IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Inter-Access point communications for distributed resource management in 802.11 networks

     Garcia Villegas, Eduard; Faixó, L; Vidal Ferre, Rafael; Paradells Aspas, Jose
    4th ACM international workshop on Wireless mobile applications and services on WLAN hotspots
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Red mallada asistida por UMTS/GPRS

     Paradells Aspas, Jose; Ferrer, J. L.; Catalan Cid, Miguel; Sánchez, X.; Beltran Querol, Vicenç; Gómez, C.; Plans, P.; Garcia Villegas, Eduard
    Jornadas Telecom I+D
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • 2005SGR-00366 Grupo de Redes Inalámbricas

     Paradells Aspas, Jose; Casademont Serra, Jordi; Garcia Villegas, Eduard
    Participation in a competitive project

     Share

  • TEC2006-4504: Interconectividad de Redes Heterogéneas Malladas Autoconfigurables

     Casademont Serra, Jordi; Paradells Aspas, Jose; Garcia Villegas, Eduard; Gomez Montenegro, Carlos
    Participation in a competitive project

     Share

  • Capacity Prediction in Ad-hoc IEEE 802.11 WLANs

     Garcia Villegas, Eduard; Vidal Ferre, Rafael; Paradells Aspas, Jose
    Seventh ACM International Symposium on Mobile Ad Hoc Networking and Computing
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Load Balancing in WLANs through IEEE 802.11k Mechanisms

     Garcia Villegas, Eduard; Vidal Ferre, Rafael; Paradells Aspas, Jose
    IEEE Symposium on Computers and Communications
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Design of a UMTS/GPRS assisted mesh network (UAMN)

     Paradells Aspas, Jose; Ferrer, J L; Catalan Cid, Maria Luisa; Torres, W; Catalan Cid, Miguel; Sanchez, X; Beltran Querol, Vicenç; Garcia Villegas, Eduard; Gomez Montenegro, Carlos; Plans, P; Rubio, J.; Almodovar, D; Rodellar, D; Subotic, N; Wenger, D; Steiner, I
    17th Wireless World Research Forum
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • New algorithm for distributed frequency assignments in IEEE 802.11

     Garcia Villegas, Eduard; Vidal Ferre, Rafael; Paradells Aspas, Jose
    11th European Wireless Conference 2005
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Implementation of a distributed dynamic channel assignment mechanism for IEEE 802.11 Networks

     Garcia Villegas, Eduard; Vidal Ferre, Rafael; Paradells Aspas, Jose
    IEEE International Symposium on Personal Indoor and Mobile Radio Communications
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • TIC2003-01748: Red Ubicua Basada en IP

     Barceló Arroyo, Francisco; Paradells Aspas, Jose; Casademont Serra, Jordi; Garcia Villegas, Eduard; Gomez Montenegro, Carlos; Martin Escalona, Israel; Zola, Enrica Valeria
    Participation in a competitive project

     Share

  • Estudio de la API de Java de AePONA

     Garcia Villegas, Eduard; Paradells Aspas, Jose; Vidal Ferre, Rafael
    Date: 2003-06
    Report

     Share Reference managers Reference managers Open in new window

  • OSA/Parlay

     Garcia Villegas, Eduard; Paradells Aspas, Jose; Vidal Ferre, Rafael
    Date: 2003-05
    Report

     Share Reference managers Reference managers Open in new window

  • Entorno de desarrollo AePONA

     Garcia Villegas, Eduard; Paradells Aspas, Jose; Vidal Ferre, Rafael
    Date: 2003-06
    Report

     Share Reference managers Reference managers Open in new window

  • Localización en redes WLAN 802.11: Desarrollo e implementación de una solución basada en traps SNMP

     Garcia Villegas, Eduard; Vidal Ferre, Rafael
    Jornadas de Ingeniería Telemática
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Aplicació de localització a la xarxa WEPSC

     Vidal Ferre, Rafael; Garcia Villegas, Eduard
    Date: 2002-09
    Report

     Share Reference managers Reference managers Open in new window

  • RSVP: montaje de una maqueta y pruebas

     Vidal Ferre, Rafael; Garcia Villegas, Eduard
    Date: 2002-07
    Report

     Share Reference managers Reference managers Open in new window

  • Introducción de IP en las redes móviles celulares: Evolución del IETF, 3GPP y 3GPP2. Cellular IP como ejemplo de solución

     Vidal Ferre, Rafael; Garcia Villegas, Eduard
    III Jornades de Ingeniería Telemática
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Cellular IP: descripción del protocolo, implmentación y montaje de una maqueta

     Vidal Ferre, Rafael; Garcia Villegas, Eduard
    Date: 2001-09
    Report

     Share Reference managers Reference managers Open in new window