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Ara es mostren els items 13-32 de 54

    • Characterisation of radio access network slicing scenarios with 5G QoS provisioning 

      Vilà Muñoz, Irene; Pérez Romero, Jordi; Sallent Roig, Oriol; Umbert Juliana, Anna (Institute of Electrical and Electronics Engineers (IEEE), 2020-03-13)
      Article
      Accés obert
      5G systems are envisaged to support a wide range of application scenarios with variate requirements. To handle this heterogeneity, 5G architecture includes network slicing capabilities that facilitate the partitioning of ...

    • Contribución al diseño de la arquitectura de red para la integración de servicios de paquetes de datos en el sistema UMTS 

      Umbert Juliana, Anna (Universitat Politècnica de Catalunya, 2004-10-06)
      Tesi
      Accés obert
      Els sistemes de comunicacions mòbils de segona generació (2G) estan dirigits a donar servei de veu amb una qualitat acceptable. L'evolució de les necessitats dels usuaris cap a aplicacions multimedia fa necessari incorporar ...

    • Cross-layer schedulling strategy for UMTS downlink enhancement 

      Ferrús Ferré, Ramón Antonio; Alonso Zárate, Luis Gonzaga; Umbert Juliana, Anna; Revés Ballesté, Xavier; Pérez Romero, Jordi; Casadevall Palacio, Fernando José (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-06)
      Article
      Accés obert
      This article describes the benefits of including cross-layer information in the scheduling mechanism of a UMTS downlink channel. In particular, the information obtained from the fast power control algorithm is used to ...

    • D21.1 - Description of EuWIn@CTTC technical facilities and interfaces, and preliminary plan of activities 

      Payaró, Miquel; Bertzoudis, Nikolaos; Fernández, Carlos; Closas, Pau; Arribas, Javier; Verdone, Roberto; Gezici, Sinan; Umbert Juliana, Anna; Oestges, Claude; Kryszkiewicz, Pawel; Kaltenberger, Florian; Dardari, Davide (2013-04)
      Report de recerca
      Accés obert
      The nature of this deliverable of WP2.1 (“Radio interfaces for next-generation wireless systems”) is mainly descriptive; it introduces the EuWIn lab at large, providing detailed descriptions about its three sites (CTTC, ...

    • D21.3 Analysis of initial results at EuWIN@CTTC 

      Fernandez-Prades, Carles; Masera, Guido; Dardari, Davide; Calanchi, Giacomo; Umbert Juliana, Anna; Pérez Romero, Jordi; Kliks, Adrian; Kryszkiewicz, Pawel; Casadevall Palacio, Fernando José; Closas, Pau; Moragrega, Ana; Arribas, Javier; Bartzoudis, Nikolaos; Font-Bach, Oriol; Payaró, Miquel; Vinogradov, Evgenii; Oestges, Claude; Joseph, Wout; Hanssens, Brecht; Degli-Esposti, Vittorio; Vitucci, Enrico; Fleury, Bernard; Zemen, Thomas; Gan, Mingming; Nafka, Amor (2014-11)
      Report de recerca
      Accés obert
      The nature of this Deliverable of WP2.1 (“Radio interfaces for next-generation wireless systems”) is mainly descriptive and its purpose is to provide a report on the status of the different Joint Research Activities (JRAs) ...

    • D22.1 Definition of EuWIn@CNIT/Bologna testbed interfaces and preliminary plan of activities 

      Dardari, Davide; Verdone, Roberto; Abrignani, Melchiorre Danilo; Buratti, Chiara; Stajkic, Andrea; Martelli, Flavia; Kaltenberger, Florian; Payaró, Miquel; Gezici, Sinan; Umbert Juliana, Anna (2013-04)
      Report de recerca
      Accés obert

    • Deffinition and evaluation of JRRM and ASM algorithms 

      López Benítez, Miguel; Umbert Juliana, Anna; Casadevall Palacio, Fernando José; Pérez Romero, Jordi (2010-01)
      Report de recerca
      Accés obert
      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 ...

    • Deployment of indoor LTE small cells in TV white spaces 

      Abdelkader, Abdelrahman; Pérez Romero, Jordi; Umbert Juliana, Anna; Casadevall Palacio, Fernando José; Kliks, Adrian; Kryszkiewicz, Pawel (2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This work focuses on the deployment of LTE small cells acting as secondary transmitters in TVWS for indoor scenarios making use of measurements stored in a Radio Environment Map (REM) that characterizes the DVB-T reception. ...

    • Design and experimental validation of a software-defined radio access network testbed with slicing support 

      Koutlia, Katerina; Ferrús Ferré, Ramón Antonio; Coronado Calero, Estefanía; Riggio, Roberto; Casadevall Palacio, Fernando José; Umbert Juliana, Anna; Pérez Romero, Jordi (2019-01-01)
      Article
      Accés obert
      Network slicing is a fundamental feature of 5G systems to partition a single network into a number of segregated logical networks, each optimized for a particular type of service or dedicated to a particular customer or ...

    • 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)
      Report de recerca
      Accés obert
      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 ...

    • DVB-T channels measurements for the deployment of outdoor REM databases 

      Kliks, Adrian; Kryszkiewicz, Pawel; Cichon, Krzysztof; Umbert Juliana, Anna; Pérez Romero, Jordi; Casadevall Palacio, Fernando José (2014)
      Article
      Accés restringit per política de l'editorial
      In this paper the analysis of the spectrum occupancy in the TV band is provided based on the outdoor measurements campaigns carried out in Poznan, Poland in 2013 and 2014. The goal of this work is to discuss the stability ...

    • DVB-T channels measurements for the deployment of outdoor REM databases 

      Kryszkiewicz, Pawel; Kliks, Adrian; Cichon, Krzysztof; Umbert Juliana, Anna; Pérez Romero, Jordi; Casadevall Palacio, Fernando José (2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The goal of this work is to discuss the stability and other important features of the observed spectrum occupancy in the context of outdoor Radio Environment Maps database deployment. Reliable deployment ...

    • DVB-T channels power measurements in indoor/outdoor cases 

      Kliks, Adrian; Kryszkiewicz, Pawel; Cichon, Krzysztof; Umbert Juliana, Anna; Pérez Romero, Jordi; Casadevall Palacio, Fernando José (Institute of Electronics, Information and Communications Engineers (IEICE), 2014)
      Comunicació de congrés
      Accés obert
      In this paper the analysis of the spectrum occupancy in the TV band is provided based on the indoor and outdoor measurements campaigns carried out in Poznan, Poland, and Barcelona, Spain, in 2013. The goal of this work ...

    • DVB-T signal detection for indoor environments in low-SNR regime 

      Kryszkiewicz, Pawel; Kliks, Adrian; Pérez Romero, Jordi; Umbert Juliana, Anna (2014-09-01)
      Article
      Accés obert
      The problem of coexistence between the primary (licensed) and secondary (non-licensed) users can be solved in various ways. One of them assumes the application of the detailed Radio Environment Maps being a kind of ...

    • Emulador de canales radio para sistemas de comunicaciones móviles 

      Umbert Juliana, Anna; Díaz Romero, M. del Pilar (2000)
      Text en actes de congrés
      Accés obert

    • Emulador de canales radio para sistemas de comunicaciones móviles 

      Umbert Juliana, Anna; Díaz Romero, M. del Pilar (2001-03)
      Article
      Accés restringit per política de l'editorial
      La investigación que se ha desarrollado de manera continua en el campo de las comunicaciones móviles, para encontrar códigos que protejan mejor la información que se transmite por el canal radio y para evaluar protocolos ...

    • Enhanced cognitive radio operation through belief-based decision making 

      Pérez Romero, Jordi; Raschellà, Alessandro; Sallent Roig, Oriol; Umbert Juliana, Anna (VDE Conference Publications, 2010)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This paper focuses on the analysis of the trade-off existing between achieved performance and observation requirements in a decision making framework based on the cognitive cycle. For that purpose, it presents a general ...

    • Enhanced cognitive radio operation through beliefbased decision making 

      Pérez Romero, Jordi; Raschellà, Alessandro; Sallent Roig, Oriol; Umbert Juliana, Anna (VDE Conference Publications, 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper focuses on the analysis of the trade-off existing between achieved performance and observation requirements in a decision making framework based on the cognitive cycle. For that purpose, it presents a general ...

    • 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)
      Text en actes de congrés
      Accés obert
      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 ...

    • Evaluation of a belief-based decision making in a real-time platform for Cognitive Radio networks 

      Raschellà, Alessandro; Pérez Romero, Jordi; Sallent Roig, Oriol; Umbert Juliana, Anna (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents a real-time testbed based on reconfigurable devices able to transmit and receive data at different operating frequencies, which are dynamically configured. The main objective of this paper is to provide ...