Now showing items 1-20 of 21

  • A radio spectrum measurement platform for spectrum surveying in cognitive radio 

    López Benítez, Miguel; Casadevall Palacio, Fernando José (2011)
    Conference report
    Restricted access - publisher's policy
    This paper presents a sophisticated radio spectrum measurement platform specifically envisaged and designed for spectrum occupancy surveys in the context of Dynamic Spectrum Access/Cognitive Radio (DSA/CR). The presented ...
  • Common radio resource management algorithms for multimedia heterogeneous wireless networks 

    López Benítez, Miguel; Gozalvez, Javier (2011-09)
    Article
    Restricted access - publisher's policy
    Heterogeneous wireless systems are envisaged as the integration and joint cooperative management of diverse radio access networks and technologies through which network providers can satisfy the wide variety of user/service ...
  • Deffinition and evaluation of JRRM and ASM algorithms 

    López Benítez, Miguel; Umbert Juliana, Anna; Casadevall Palacio, Fernando José; Pérez Romero, Jordi (2010-01)
    External research report
    Open Access
    This deliverable (DR9.2) describes the radio resource management, joint radio resource management and advanced spectrum management strategies developed in each of the tasks of WPR.9 during the second year of study. The ...
  • Discrete-time spectrum occupancy model based on Markov chain and duty cycle models 

    Casadevall Palacio, Fernando José; López Benítez, Miguel (2011)
    Conference report
    Restricted access - publisher's policy
    This paper presents an empirical time-dimension model of spectrum use in the context of dynamic spectrum access. Concretely, a discrete-time two-state Markov chain with novel duty cycle models is proposed as an adequate ...
  • DR9.3 Final report of the JRRM and ASM activities 

    Debbah, Merouane; Kliks, Adrian; Moy, Christophe; Palicot, Jacques; Jouini, Wassim; Casadevall Palacio, Fernando José; Umbert Juliana, Anna; López Benítez, Miguel; Pérez Romero, Jordi; Serrador, António; Caeiro, Luisa; Correia, Luis; Moretti, Marco; Bezerra Rodrigues, Emanuel; Sroka, Pawel; Bogucka, Hanna (2010-12)
    External research report
    Open Access
    This deliverable provides the final report with the summary of the activities carried out in NEWCOM++ WPR9, with a particular focus on those obtained during the last year. They address on the one hand RRM and JRRM strategies ...
  • Empirical Time-Dimension Model of Spectrum Use Based on a Discrete-Time Markov Chain With Deterministic and Stochastic Duty Cycle Models 

    López Benítez, Miguel; Casadevall Palacio, Fernando José (2011-07)
    Article
    Restricted access - publisher's policy
    The spectrum occupancy models widely used to date in dynamic spectrum access/cognitive radio (DSA/CR) research frequently rely on assumptions and oversimplifications that have not been validated with empirical measurement ...
  • Evaluación del nivel de utilización del espectro: Posibilidades de la tecnología cognitive radio en España 

    López Benítez, Miguel; Casadevall Palacio, Fernando José; Umbert Juliana, Anna (2009)
    Conference report
    Open Access
    Cognitive radio has been identified as a promising solution to the so-called spectrum scarcity problem. The basic idea of this paradigm is to allow unlicensed users to access in an opportunistic and non-interfering ...
  • Joint learning-detection framework: an empirical analysis 

    López Benítez, Miguel; Pérez Romero, Jordi (2011)
    Conference report
    Restricted access - publisher's policy
    Within a context of Cognitive Radio, we explore the possibility to detect the presence of users on a given band with no a priori knowledge on the environment. This paper ventures the analysis of a joint learning-detection ...
  • Link adaptation algorithms for improved delivery of delay- and error-sensitive packet-data services over wireless networks 

    López Benítez, Miguel; Gozalvez, Javier (2010-04)
    Article
    Open Access
    Link Adaptation is a radio resource management technique that assesses the channel conditions and selects a transport mode, from a set of possible options, which is optimised for these conditions according to a predefined ...
  • Modeling and simulation of joint time-frequency properties of spectrum usage in cognitive radio 

    Casadevall Palacio, Fernando José; López Benítez, Miguel; López Pérez, David Orencio; Vasilakos, Athanasios V. (2011)
    Conference report
    Restricted access - publisher's policy
    The development of the Dynamic Spectrum Access/Cogni- tive Radio (DSA/CR) technology can signi cantly bene t from the availability of realistic models able to accurately capture and reproduce the statistical properties ...
  • Modeling and simulation of time-correlation properties of spectrum use in cognitive radio 

    López Benítez, Miguel; Casadevall Palacio, Fernando José (2011)
    Conference report
    Restricted access - publisher's policy
    The development of the cognitive radio technology can enormously benefit from the availability of realistic and accurate spectrum occupancy models. Time-dimension models of spectrum use proposed in the literature so far ...
  • On the spectrum occupancy perception of cognitive radio terminals in realistic scenarios 

    López Benítez, Miguel; Casadevall Palacio, Fernando José (2010)
    Conference report
    Restricted access - publisher's policy
    Cognitive radio terminals sense the spectrum to detect temporarily unoccupied spectrum gaps and transmit. The behavior of a network of cognitive radio terminals therefore depends on the spectrum occupancy perceived by ...
  • Performance of spectrum sensing for cognitive radio based on field measurements of various radio technologies 

    López Benítez, Miguel; Casadevall Palacio, Fernando José; Martella, Corrado (2010)
    Conference report
    Restricted access - publisher's policy
    Despite its practical performance limitations, energy detection has gained popularity during the last years as a spectrum sensing technique for dynamic spectrum access in cognitive radio networks. The main advantages of ...
  • Radio environmental maps: information models and reference model. Document number D4.1 

    Casadevall Palacio, Fernando José; Agustí Comes, Ramon; Pérez Romero, Jordi; López Benítez, Miguel; Grimoud, Sebastien; Sayrac, Berna; Dagres, Ioannis; Polydoros, Andreas; Riihijärvi, Janne; Nasreddine, Jad Nayef; Mähönen, Petri; Gavrilovska, Liljana; Atanasovski, Vladimir; Van de Beek, Jaap (2011-04-30)
    External research report
    Open Access
    We describe herein the envisioned improvements of the REMs due to advanced sensing and processing. In relation to that, we also discuss the underlying modelling assumptions. Finally, we comment on how REMs can be of use ...
  • Real-time HSPA emulator for end-to-edge QoS evaluation in all-IP beyond 3G heterogeneous wireless networks 

    López Benítez, Miguel; Bernardo Álvarez, Francisco; Vucevic, Nemanja; Umbert Juliana, Anna (ICST, 2008)
    Conference lecture
    Open Access
    This paper is aimed at presenting the real-time High Speed Packet Access (HSPA) emulator that has been developed in the framework of the AROMA project. Real-time emula- tors allow reproducing realistic scenarios to test ...
  • Spatial duty cycle model for cognitive radio 

    López Benítez, Miguel; Casadevall Palacio, Fernando José (2010)
    Conference report
    Restricted access - publisher's policy
    Spectrum occupancy modeling in the context of Dynamic Spectrum Access/Cognitive Radio (DSA/CR) constitutes a rather unexplored research area that still requires much more effort. This paper addresses the problem of modeling ...
  • Spectrum occupancy in realistic scenarios and duty cycle model for cognitive radio 

    López Benítez, Miguel; Casadevall Palacio, Fernando José (2010-04)
    Article
    Open Access
    Most of the spectrum occupancy measurement campaigns performed to the date in the context of cognitive radio are based on measurements in outdoor high points such as building roofs, balconies and towers. Although these ...
  • Spectrum usage models for the analysis, design and simulation of cognitive radio networks 

    López Benítez, Miguel; Casadevall Palacio, Fernando José (Springer, 2012-05-01)
    Part of book or chapter of book
    Restricted access - publisher's policy
    This chapter presents a comprehensive set of spectrum occupancy models specifically envisaged for the analysis, design and simulation of cognitive radio systems. The presented models have been proven to accurately capture ...
  • Spectrum usage models for the analysis, design and simulation of cognitive radio networks 

    López Benítez, Miguel (Universitat Politècnica de Catalunya, 2011-07-20)
    Doctoral thesis
  • Statistical prediction of spectrum occupancy perception in dynamic spectrum access networks 

    Casadevall Palacio, Fernando José; López Benítez, Miguel (2011)
    Conference report
    Restricted access - publisher's policy
    Cognitive radio nodes of a dynamic spectrum access network monitor the spectrum around them in order to detect and opportunistically exploit temporarily unoccupied spectrum gaps. The overall behavior of the whole network ...