Now showing items 1-20 of 39

  • 5G transport network requirements for the next generation fronthaul interface 

    Bartelt, Jens; Vucic, Nikola; Camps Mur, Daniel; García Villegas, Eduard; Seyfettin Demirkol, Ilker; Fehske, Albrecht; Grieger, Michael; Tzanakaki, Anna; Gutiérrez Terán, Jesús; Grass, Eckhard; Lyberopoulos, George; Fettweis, Gerhard (2017-05-15)
    Article
    Open Access
    To meet the requirements of 5G mobile networks, several radio access technologies, such as millimeter wave communications and massive MIMO, are being proposed. In addition, cloud radio access network (C-RAN) architectures ...
  • 5G-XHaul: a converged optical and wireless solution for 5G transport networks 

    Gutiérrez Terán, Jesús; Maletic, Nebojsa; Camps Mur, Daniel; García Villegas, Eduard; Berberana, Ignacio; Anastasopoulos, Markos; Tzanakaki, Anna; Kalokidou, Vaia; Flegkas, Paris; Syrivelis, Dimitris; Korakis, Thanasis; Legg, Peter; Markovic, Dusan; Limperopoulos, George; Bartelt, Jens; Chaudhary, Jay Kant; Grieger, Michael; Vucic, Nikola; Zou, Jim; Grass, Eckhard (Wiley-Blackwell, 2016-07-08)
    Article
    Open Access
    The common European Information and Communications Technology sector vision for 5G is that it should leverage on the strengths of both optical and wireless technologies. In the 5G context, a wide spectra of radio access ...
  • Access-aware backhaul optimization in 5G 

    Rony, Rakibul Islam; López Aguilera, M. Elena; García Villegas, Eduard (Association for Computing Machinery (ACM), 2018)
    Conference report
    Open Access
    Aggressive demand of future access network services is being translated into the stringent requirement on future backhaul infrastructure. It is not possible to take the backhaul resources for granted anymore; rather, more ...
  • 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 ...
  • An alternative to IEEE 802.11ba: wake-up radio with legacy IEEE 802.11 transmitters 

    Cervià Caballé, Martí; Calveras Augé, Anna M.; López Aguilera, M. Elena; García Villegas, Eduard; Seyfettin Demirkol, Ilker; Paradells Aspas, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2019-04-09)
    Article
    Open Access
    Current standardization process for Wake-up Radio (WuR) within the IEEE 802.11 Working Group, known as the IEEE 802.11ba, has brought interest to the IEEE 802.11-related technologies for the implementation of WuR systems. ...
  • A novel cheater and jammer detection scheme for IEEE 802.11-based wireless LANs 

    García Villegas, Eduard; Afaqui, Muhammad Shahwaiz Iqbal; López Aguilera, M. Elena (2015-07-05)
    Article
    Open Access
    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 practical framework for 802.11 MIMO rate adaptation 

    Deek, Lara; García Villegas, Eduard; Belding, Elizabeth; Lee, Sung-Ju; Almeroth, Kevin (2015-06-04)
    Article
    Open Access
    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 optimizing transmission. ...
  • 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
    Restricted access - publisher's policy
    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 ...
  • 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 management in a campus-wide WLAN with partially overlapping channels 

    Mengual Pérez, Ester; García Villegas, Eduard; Vidal Ferré, Rafael (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference lecture
    Restricted access - publisher's policy
    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 ...
  • Competition: interference-aware multi-channel cross layer protocol for energy-efficient and low-delay networking 

    Sierra Aiello, Guillermo; Seyfettin Demirkol, Ilker; Calveras Augé, Anna M.; Gómez Montenegro, Carlos; García Villegas, Eduard; Betzler, August (Association for Computing Machinery (ACM), 2016)
    Conference lecture
    Restricted access - publisher's policy
    This document aims to present the general ideas and methodology that are planned to be used for the EWSN 2016 Dependability Competition by the Wireless Networks Group of Universitat Politecnica de Catalunya. We designed, ...
  • 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 spectrum sharing in 5G access and backhaul networks 

    Rony, Rakibul Islam; López Aguilera, M. Elena; García Villegas, Eduard (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Restricted access - publisher's policy
    Stringent demands for a continuous evolution of cellular networks push today academic and industrial researchers to re-think backhaul solutions for 5G. In one hand, wireless backhaul solutions are cost effective and easy ...
  • Deploying large-scale IEEE802.11 networks using IP paging with link-specific capabilities : a standard compliant approach and its performance analysis 

    Vidal Ferré, Rafael; García Villegas, Eduard; Paradells Aspas, Josep (2010-03-18)
    Article
    Restricted access - publisher's policy
    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 ...
  • Design and realization of precise indoor localization mechanism for Wi-Fi devices 

    Su, Weideng; Liu, Erwu; Calveras Augé, Anna M.; García Villegas, Eduard; Wang, Rui; You, Jiayi (2016-12-31)
    Conference lecture
    Open Access
    Despite the abundant literature in the field, there is still the need to find a time-efficient, highly accurate, easy to deploy and robust localization algorithm for real use. The algorithm only involves minimal human ...
  • 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 ...
  • Dynamic sensitivity control algorithm leveraging adaptive RTS/CTS for IEEE 802.11ax 

    Afaqui, Muhammad Shahwaiz Iqbal; García Villegas, Eduard; López Aguilera, M. Elena (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Restricted access - publisher's policy
    The need for higher data rates and improved coverage has led to massive and uncoordinated deployments of IEEE 802.11 based WLAN Access Points in geographically limited areas that has resulted in increased interference with ...
  • Dynamic sensitivity control of access points for IEEE 802.11ax 

    Afaqui, Muhammad Shahwaiz Iqbal; García Villegas, Eduard; López Aguilera, M. Elena; Campus Mur, Daniel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Restricted access - publisher's policy
    The popularity and wider acceptance of IEEE 802.11 based WLANs has resulted in their dense deployments in diverse environments. While this massive deployment can potentially increase capacity and coverage, the current physical ...
  • 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 ...