Exploració per tema "Long-term evolution (Telecomunicacions)"

Ara es mostren els items 21-39 de 39

    • 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
      Accés restringit per política de l'editorial
      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)
      Text en actes de congrés
      Accés obert
      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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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
      Accés restringit per política de l'editorial
      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 downlink physical layer processing chain SDR application acceleration with GPUs 

      Arteaga Martínez, Xavier (Universitat Politècnica de Catalunya, 2012-07-13)
      Treball Final de Grau
      Accés obert
      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)
      Projecte Final de Màster Oficial
      Accés obert
      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)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   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 ...

    • LTE-Advanced cell-specific reference signals in dependence of power allocation 

      Camas Jardí, Júlia (Universitat Politècnica de Catalunya, 2018-06)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   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 ...

    • MPR-aware scheduler for carrier aggregation transmissions in LTE uplink 

      Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia (2015-09-01)
      Article
      Accés obert
      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
      Accés obert
      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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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
      Accés restringit per política de l'editorial
      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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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)
      Projecte Final de Màster Oficial
      Accés obert
      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)
      Projecte Final de Màster Oficial
      Accés obert
      [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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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
      Accés obert
      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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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 ...