Now showing items 21-40 of 40

  • Improved scheduling techniques for efficient uplink communications with carrier aggregation 

    Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia; Olmos Bonafé, Juan José (2013)
    Conference report
    Restricted access - publisher's policy
    Transmitted power in Long Term Evolution - Advanced (LTE-A) uplink (UL) is strongly related to the number of physical resource blocks (PRBs) allocated. As the transmitted bandwidth increases power does so. However, this ...
  • Intercell interference coordination for control channels in LTE and LTE-A: an optimization scheme based on evolutionary algorithms 

    González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia (2017-04)
    Article
    Restricted access - publisher's policy
    Intercell Interference Coordination (ICIC) encompasses techniques aiming at reducing the intercell interference at cell edges, an issue affecting not only data but also control channels in Long Term Evolution (LTE) and ...
  • Interference coordination method for CSI improvement in LTE uplink with carrier aggregation 

    Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Open Access
    Carrier Aggregation is an important feature in Long Term Evolution Advanced (LTE-A). It allows operators to provide larger operational bandwidths without the need of having a contiguous, large piece of spectrum. However, ...
  • Introduction of MPR information for enhanced multi-cluster scheduling in LTE-A uplink 

    Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia; González González, David (2013)
    Conference report
    Restricted access - publisher's policy
    Against previous Long Term Evolution (LTE) re-leases, LTE-Advanced (LTE-A) allows the use of non-contiguous resource allocation in the uplink (UL). This feature leads to an increase in spectral efficiency thanks to link ...
  • Is the random access channel of LTE and LTE-A suitable for M2M communications? A survey of alternatives 

    Laya Romero, Andrés Ernesto; Alonso Zárate, Luis Gonzaga; Alonso-Zárate, Jesús (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Article
    Restricted access - publisher's policy
    The 3GPP has raised the need to revisit the design of next generations of cellular networks in order to make them capable and efficient to provide M2M services. One of the key challenges that has been identified is the ...
  • LTE-Advanced cell-specific reference signals in dependence of power allocation 

    Camas Jardí, Júlia (Universitat Politècnica de Catalunya, 2018-06)
    Bachelor thesis
    Open Access
    Covenantee:  Technische Universität Wien
    The main objective of this thesis is to study the channel estimation subject in LTE ( Long Term Evolution). LTE uses coherent detection and, with the purpose of obtaining information about the channel, pilot signals are ...
  • LTE downlink physical layer processing chain SDR application acceleration with GPUs 

    Arteaga Martínez, Xavier (Universitat Politècnica de Catalunya, 2012-07-13)
    Bachelor thesis
    Open Access
    The technology moves fast and the wireless systems tend to be software defined radio (SDR). The new wireless standards increase the efficiency of communications, also its complexity, which demand more processing. The ...
  • LTE Handover performance evaluation based on power budget handover algorithm 

    Iñiguez Chavarría, José Bruno (Universitat Politècnica de Catalunya, 2014-02-27)
    Master thesis
    Open Access
    LTE (Long Term Evolution) is a fourth generation cellular network technology that provides improved performance related to data rate, coverage and capacity compared to legacy cellular systems. In this context, one of the ...
  • LTE network Virtualisation 

    Ferrer Guasch, Vicent (Universitat Politècnica de Catalunya / Aalto-yliopisto. School of Electrical Engineering, 2013-10-22)
    Master thesis (pre-Bologna period)
    Open Access
    Covenantee:  Aalto-yliopisto. Sähkötekniikan korkeakoulu
    [ANGLÈS] The mobile networks technologies require great investments by the operators but the technology amortization is difficult due to its fast evolution and tight market competition. The virtualisation of the LTE mobile ...
  • MPR-aware scheduler for carrier aggregation transmissions in LTE uplink 

    Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia (2015-09-01)
    Article
    Open Access
    Unlike previous Long Term Evolution (LTE) releases, LTE - Advanced (LTE-A) allows the use of non-contiguous resource allocation in the uplink (UL). This feature leads to increase the spectral efficiency thanks to link ...
  • Multiobjective optimization of fractional frequency reuse for irregular OFDMA macrocellular deployments 

    González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia; Lema, Maria A.; Lee, Dong Seop (2015-06)
    Article
    Open Access
    Interference mitigation has been identified as a key challenge for emerging cellular technologies based on Orthogonal Frequency Division Multiple Access, such as Long Term Evolution. In this context, static intercell ...
  • On the performance of static inter-cell interference coordination in realistic cellular layouts 

    González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia; Olmos Bonafé, Juan José (Springer Verlag, 2010)
    Conference report
    Restricted access - publisher's policy
    Effective interference management has been recognized by the industry and standardization bodies as a key enabler for 4G systems. This work is about static Inter-Cell Interference Coordination for OFDMA based cellular ...
  • Optimization of soft frequency reuse for irregular LTE macrocellular networks 

    González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia; Lee, Dong Seop (2013-05-29)
    Article
    Restricted access - publisher's policy
    Interference management has been recognized by the industry as a key enabler for 4G systems. Emerging technologies include multicarrier systems such as LTE and WiMAX for which effective management of intercell interference ...
  • Performance analysis of inter-cell interference coordination in small-cell networks with long feedback delays 

    Torrellas Socastro, Marc; Agustín de Dios, Adrián; Vidal Manzano, José (2014)
    Conference report
    Restricted access - publisher's policy
    Current state-of-the-art approaches are evaluated for the downlink (DL) of an LTE-based wireless network when multiple Small-Cells (SC) eNBs coexist in the same area. With the aim of increasing data-rate performance of ...
  • Performance analysis of prioritization in LTE networks with the Vienna LTE system level simulator 

    Assaf, Simon Sassine (Universitat Politècnica de Catalunya, 2014-07-18)
    Master thesis
    Open Access
    This study was performed with two main goals in mind. The first goal was to understand the prioritisation capabilities in Long Term Evolution (LTE) networks and how it is done. The second goal was to understand the simulation ...
  • Pico Cell Range Expansion toward LTE-Advanced Wireless Heterogeneous Networks 

    Joud, Mohammad (Universitat Politècnica de Catalunya, 2013-01-14)
    Master thesis
    Open Access
    [ANGLÈS] Deploying low power nodes within a macro cell layout, also known as heterogeneous networks (HetNets), is a promising solution to enhance the global performance of LTE mobile communication systems and particularly ...
  • Predicting QoS in LTE HetNets based on location-independent UE measurements 

    Moysen Cortes, Jessica; Giupponi, Lorenza; Baldo, Nicola; Mangues Bafalluy, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Restricted access - publisher's policy
    This paper aims to find patterns of knowledge from physical layer data coming from Heterogeneous Long Term Evolution (LTE) networks. We discuss how the collected data is employed in such a manner that improves Minimization ...
  • Self coordination among SON functions in LTE heterogeneous networks 

    Moysen Cortes, Jessica; Giupponi, Lorenza (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Restricted access - publisher's policy
    In a self-organized Long Term Evolution (LTE) network, different Self-Organizing Network (SON) functions or different instances of the same SON function can execute parallel actions, which interact or collide among each ...
  • Self-coordination of parameter conflicts in D-SON architectures: a Markov decision process framework 

    Moysen Cortes, Jessica; Giupponi, Lorenza (2015-12-01)
    Article
    Open Access
    We consider a distributed SON (D-SON) architecture where the interaction of different self-organizing network (SON) functions negatively affect the performances of the system. This is referred to in 3rd Generation Partnership ...
  • Sounding reference signals management for CSI improvement in LTE uplink with carrier aggregation 

    Lema, Maria A.; García Lozano, Mario; Ruiz Boqué, Sílvia (2014)
    Conference report
    Restricted access - publisher's policy
    To assure a good channel state information (CSI) in the uplink users need to send sounding reference signals along the entire bandwidth. This task is challenging in a Carrier Aggregation framework, as the time period ...