Now showing items 1-20 of 58

  • Adapting fractional frequency reuse to realistic OFDMA cellular networks 

    González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia; Lema, Maria A.; Lee, Dong Seop (2013)
    Conference report
    Restricted access - publisher's policy
    Effective intercell interference (ICI) mitigation has been identified as a key challenge for emerging OFDMA cellular technologies such as Long Term Evolution (LTE). In order to address this issue, mobile operators have ...
  • Admission control in LTE uplink systems with sounding reference signals based channel state indicator 

    Lema, Maria A.; Ramon Ferran, Sergi; García Lozano, Mario; Ruiz Boqué, Sílvia; Olmos Bonafé, Juan José (2012)
    Conference report
    Restricted access - publisher's policy
    This article focuses on the investigation of the Admission Control techniques in order to assure Quality of Service (QoS) in Long Term Evolution (LTE) systems. So as to estimate the users bandwidth requirement, Sounding ...
  • A metaheuristic-based downlink power allocation for LTE/LTE-A cellular deployments 

    González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia; Lee, Dong Seop (2014-08)
    Article
    Restricted access - publisher's policy
    The explosive growth of cellular networks makes their deployment and maintenance more and more complex, time consuming, and expensive. Self-Organizing Networks have been recognized as a promising way to alleviate this ...
  • An analytical view of static intercell interference coordination techniques in OFDMA networks 

    González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia; Olmos Bonafé, Juan José (IEEE, 2012)
    Conference report
    Restricted access - publisher's policy
    This paper presents a novel methodology to assess the downlink performance of static intercell interference coordination techniques in the context of OFDMA-based cellular networks. In the last few years, interference ...
  • An opportunistic cognitive radio communication through the exploitation of the small-scale fading mechanisms of the LTE mobile channel 

    Medina Acosta, Gerardo Agni; Delgado Penin, José Antonio; Haneda, Katsuyuki (2013)
    Article
    Open Access
    In recent years, the cognitive radio technology has attracted the attention of all the players in the telecommunication field (i.e., researchers, industry, service providers, and regulatory agencies) as a way of facing the ...
  • A novel ICIC-oriented channel state information feedback scheme for aperiodic reporting in LTE 

    González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia; Olmos Bonafé, Juan José (2012)
    Conference report
    Restricted access - publisher's policy
    In moderm OFDMA-based cellular networks, intercell interference is the main issue limiting the capacity of these systems. Recently, intensive research work has been focused on intercell interference coordination as it ...
  • A roadmap from UMTS optimization to LTE self-optimization 

    Sallent Roig, José Oriol; Pérez Romero, Jordi; Sánchez González, Juan; Agustí Comes, Ramon; Díaz Guerra, Miguel Angel; Henche, David; Paul, Daniel (2011-06)
    Article
    Restricted access - publisher's policy
    Self-Organizing Networks (SON) are currently being introduced by the 3rd Generation Partnership Project (3GPP) as part of the Long Term Evolution (LTE) system as a key driver for improving the operation of wireless networks. ...
  • Cubic spline extrapolation for uplink channel quality prediction in LTE-A with carrier aggregation 

    Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia (Wiley-Blackwell, 2015-05-25)
    Article
    Open Access
    In the context of wireless communications, an accurate channel state information is the key to a correct radio resource management. In the uplink of long-term evolution advanced, obtaining up-to-date channel state information ...
  • Development of a LTE system-level simulator for aircraft cabins 

    Muñoz López, Albert (Universitat Politècnica de Catalunya, 2012-11-30)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    [ANGLÈS] Mobile broadband has changed the way we live and work. The way we communicate is becoming enriched with higher speeds and exciting new services both at home, on the road and on aircraft. Nowadays, a growing number ...
  • Diseño de la red de transporte de un sistema de telefonía móvil LTE 

    García Fernández, Iria (Universitat Politècnica de Catalunya, 2013-03-21)
    Bachelor thesis
    Restricted access - author's decision
    The present project proposes the development of a Long Term Evolution (LTE) mobile telecommunications network and its implementation in a suburban town with a population of approximately 250.000 inhabitants. More precisely, ...
  • Diseño de una herramienta de simulación de coberturas para el estudio de estrategias de densificación en LTE 

    Lopez Raventos, Alvaro (Universitat Politècnica de Catalunya, 2016-01-07)
    Bachelor thesis
    Open Access
    Developed by 3GPP, LTE (Long Term Evolution) is a technology used in mobile communications that provides higher data rates than older technologies. However, because of the higher usage of smartphones during the last years, ...
  • Downlink resource allocation in LTE: centralized vs. distributed approach 

    González González, David; Corvino, Virginia; Ruiz Boqué, Sílvia; Olmos Bonafé, Juan José; García Lozano, Mario; Verdone, Roberto (2009-09-30)
    Conference report
    Restricted access - publisher's policy
    The 3GPP specifications for LTE leave many degrees of freedom to operators about how to design radio Resource Allocation (RA) strategies, and this is actually also allowed by the OFDM/OFDMA access technology. This means ...
  • Dynamic energy efficient distance-aware base station switch on/off scheme for LTE-advanced 

    Kartsakli, Elli; Bousia, Alexandra; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2012)
    Conference report
    Restricted access - publisher's policy
    Reducing the energy consumption in wireless networks has become a significant problem, not only because of its great impact on the global energy crisis, but also because it represents a noteworthy cost for telecommunication ...
  • Efficient Mobility Management in LTE Femtocell Network 

    Xiang, Tianyu (Universitat Politècnica de Catalunya, 2014-08)
    Master thesis
    Open Access
    The future network architecture towards heterogeneous, it would be converged many different types of network, such as cellular network, femtocell network, ad-hoc network, MANET, VANET and wireless sensor network. With new ...
  • Efficient use of paired spectrum bands through TDD small cell deployments 

    Agustín de Dios, Adrián; Lagén Morancho, Sandra; Vidal Manzano, José; Muñoz Medina, Olga; Pascual Iserte, Antonio; Zhiheng, Guo; Ronghui, Wen (2017-09)
    Article
    Open Access
    Traditionally, wireless cellular systems have been designed to operate in frequency division duplexing (FDD) paired bands that allocate the same amount of spectrum for both downlink (DL) and uplink (UL) communications. ...
  • Energy and spectrum efficient user association in millimeter wave backhaul small cell networks 

    Mesodiakaki, Agapi; Adelantado Freixer, Ferran; Alonso Zárate, Luis Gonzaga; Di Renzo, Marco; Verikoukis, Christos (2017-02)
    Article
    Open Access
    Macrocells are expected to be densely overlaid by small cells (SCs) to meet increasing capacity demands. Due to their dense deployment, some SCs will not be connected directly to the core network, and thus, they may forward ...
  • Energy-and spectrum-efficient user association in millimeter-wave backhaul small-cell networks 

    Mesodiakaki, Agapi; Adelantado Freixer, Ferran; Alonso Zárate, Luis Gonzaga; di Renzo, Marco; Verikoukis, Christos (2017-02-01)
    Article
    Open Access
    Macrocells are expected to be densely overlaid by small cells (SCs) to meet increasing capacity demands. Due to their dense deployment, some SCs will not be connected directly to the core network, and thus, they may forward ...
  • Estudi de cobertura en una xarxa LTE-Advanced 

    Forca Bastús, Marc (Universitat Politècnica de Catalunya, 2017-06)
    Bachelor thesis
    Open Access
    The great demand for mobile data traffic has led to the development of new technologies. The last of these is known as LTE-Advanced. This incorporates great improvements that have revolutionized the mobile technology market. ...
  • Estudi sobre handovers i selecció de cel·les LTE: simulació d'escenaris crítics utilitzant Ray Tracing 

    Coll Muñoz, Marta (Universitat Politècnica de Catalunya, 2011)
    Master thesis (pre-Bologna period)
    Open Access
    Covenantee:  Aalborg universitet
    [ANGLÈS] In LTE, the handover is a hard handover; the UE is first connected to the source eNodeB, then it gets unattached to the network to connect again to the target eNodeB. This procedure is not fail safe and may cause ...
  • Evolutionary 4G/5G network architecture assisted efficient handover signaling 

    Jain, Akshay; López Aguilera, M. Elena; Seyfettin Demirkol, Ilker (Institute of Electrical and Electronics Engineers (IEEE), 2018-12-06)
    Article
    Open Access
    Future wireless networks are expected to be ultra-dense and heterogeneous not just in terms of the number and type of base stations but also in terms of the number of users and the application types they access. Such a ...