Now showing items 1-20 of 24

    • 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 ...
    • Smart spectrum technologies for mobile information systems 

      López Benítez, Miguel; Lehtomaki, Janne; Umebayashi, Kenta; Casadevall Palacio, Fernando José (2016-07-31)
      Article
      Open Access
    • Space-dimension models of spectrum usage for cognitive radio networks 

      López Benítez, Miguel; Casadevall Palacio, Fernando José (2017-01-01)
      Article
      Open Access
      The dynamic spectrum access (DSA) principle, relying on the cognitive radio (CR) paradigm, allows users to access spectrum over time intervals or spatial areas where it remains unused. Due to the opportunistic nature of ...
    • 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 in cognitive radio networks: from field measurements to empirical models 

      López Benítez, Miguel; Casadevall Palacio, Fernando José (2014-02)
      Article
      Restricted access - publisher's policy
      Cognitive Radio (CR) is aimed at increasing the e ffi ciency of spectrum utilization by allowing unlicensed users to access, in an op- portunistic and non-interfering manner, some licensed bands temporarily and / or ...