Now showing items 21-40 of 79

  • 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 ...
  • DVB-T2 network optimization with swimulated annealing 

    Ruiz Boqué, Sílvia; López Arranz, Carlos; Enrique Herrero, Carlos; García Lozano, Mario; Minerva, Flaminio (2009-09-30)
    Conference lecture
    Open Access
  • Efficient cognitive radio networks with cooperative beamforming 

    Ling, Cen; Ruiz Boqué, Sílvia; Yin, Xuefeng; García Lozano, Mario (2014)
    Conference report
    Restricted access - publisher's policy
    Cooperative communication with spectrum sharing has been proved to be an efficient way to reduce energy consumption. In this work an optimal power allocation algorithm is proposed for mobile cooeprative beamforming networks, ...
  • Energy saving scheme for multicarrier HSPA + under realistic traffic fluctuation 

    Jada, Maliha Urooj; García Lozano, Mario; Hämäläinen, Jyri (2016-04)
    Article
    Open Access
    In the near future, an increase in cellular network density is expected to be one of the main enablers to boost the system capacity. This development will lead to an increase in the network energy consumption. In this ...
  • Enhanced analysis of WCDMA networks with repeaters deployment 

    García Lozano, Mario; Alonso Zárate, Luis Gonzaga; Casadevall Palacio, Fernando José; Ruiz Boqué, Sílvia; Correia, Luis M. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-08)
    Article
    Open Access
    This paper addresses the analysis of WCDMA systems with repeaters deployment. A generic and compact expression for up- and downlinks evaluation has been mathematically derived so that transmission powers and other radio ...
  • Exponential effective SIR link performance model for LTE downlink 

    Olmos Bonafé, Juan José; Serra, Albert; Ruiz Boqué, Sílvia; García Lozano, Mario; González González, David (2009-05-18)
    Conference lecture
    Open Access
  • Exponential effective SIR metric for LTE downlink 

    Olmos Bonafé, Juan José; Serra, Albert; Ruiz Boqué, Sílvia; García Lozano, Mario; González González, David (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-09-16)
    Conference report
    Open Access
  • Feasibility condition for the uplink of a CDMA multiservice mobile communication system with repeaters 

    Alonso Zárate, Luis Gonzaga; García Lozano, Mario; Casadevall Palacio, Fernando José (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-05)
    Article
    Open Access
    This paper derives a general analytical expression of the feasibility condition for the uplink of a CDMA mobile communications system in a general scenario where the users in the system belong to an arbitrary number of ...
  • Green and effi cient RAN architectures 

    García Lozano, Mario; González González, David; Lema Rosas, María Ángel; Papaj, Ján (River Publishers, 2016-06-01)
    Part of book or chapter of book
    Open Access
    The demand for mobile connectivity is continuously increasing, and by 2020 Mobile and Wireless Communications will serve not only very dense populations of mobile phones and nomadic computers, but also the expected ...
  • Help4Mood: a computational distributed system to support the treatment of patients with major depression 

    Pérez Díaz de Cerio, David; Valenzuela González, José Luis; Ruiz Boqué, Sílvia; García Lozano, Mario; Colomé, Josep Maria (2011)
    Conference report
    Restricted access - publisher's policy
    A closed loop approach supporting the control, communication and treatment management of patients with Major Depression is presented, based on a distributed system with three main components: a Personal Monitoring System, ...
  • HetNets: la gestió de la interferència 

    García Lozano, Mario; Giupponi, Lorenza (2011-12-01)
    Article
    Open Access
  • Impact of downlink signaling capacity constraints on the provision of QoS in LTE 

    González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia; Olmos Bonafé, Juan José (2011)
    Conference report
    Restricted access - publisher's policy
    Choosing appropriate scheduling policies is of utmost importance to deliver acceptable levels of Quality of Service (QoS) to users of LTE networks. This decision is not only conditioned by the type of services expected ...
  • Improved component carrier selection considering MPR information for LTE-A uplink systems 

    Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia; González González, David (IEEEXPLORE, 2013)
    Conference report
    Restricted access - publisher's policy
    Carrier Aggregation (CA) is one of the key features introduced in LTE Release 10 to achieve higher levels of throughput. Two or more component carriers (CCs) are aggregated and user equipments (UEs) simultaneously transmit ...
  • Improved scheduling decisions for LTE-A uplink based on MPR information 

    Lema, Maria A.; García Lozano, Mario; Ruiz Boqué, Sílvia; Olmos Bonafé, Juan José (2013)
    Conference report
    Restricted access - publisher's policy
    Advanced (LTE-A) allows for non-contiguous resource allocation in the uplink. The aim is to increase the spectral efficiency by exploiting users’ frequency diversity gain. This feature implies that clustered-DFT-S-OFDM must ...
  • 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 ...
  • Improving channel state information feedback for static Intercell interference coordination in LTE 

    González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia; Olmos Bonafé, Juan José (2012)
    Conference report
    Restricted access - publisher's policy
    Intercell Interference is the main issue limiting the capacity of modern OFDMA-based cellular networks. Recently, extensive research work has been focused on intercell interference coordination since it has been recognized ...
  • Improving soft frequency reuse for realistic OFDMA-based cellular deployments 

    González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia; Lee, DongSeop (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Conference report
    Restricted access - publisher's policy
    Effective interference management is a technical challenge of utmost importance for emerging OFDMA-based technologies such as Long Term Evolution (LTE) and Worldwide Interoperability for Microwave Access (WiMAX). Static ...
  • 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 ...
  • Intercell interference coordination for the ePDCCH in LTE-advanced macrocellular deployments 

    González González, David; García Lozano, Mario; Ruiz Boqué, Sílvia (2013)
    Conference report
    Restricted access - publisher's policy
    Abstract—This paper investigates several schemes to improve the performance of the enhanced Physical Downlink Control Channel (ePDCCH) in Long Term Evolution Advanced (LTEA) networks by means of Intercell Interference ...
  • 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, ...