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Ara es mostren els items 21-40 de 54

    • 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 ...

    • Evaluation of a multi-cell and multi-tenant capacity sharing solution under heterogeneous traffic distributions 

      Vilà Muñoz, Irene; Pérez Romero, Jordi; Sallent Roig, Oriol; Umbert Juliana, Anna (2021)
      Comunicació de congrés
      Accés obert
      One of the key features of the 5G architecture is network slicing, which allows the simultaneous support of diverse service types with heterogeneous requirements over a common network infrastructure. In order to support ...

    • Final report on the evaluation of RRM/CRRM algorithms 

      Barbaresi, Andrea; Casadevall Palacio, Fernando José; Gelabert Doran, Xavier; Majkowski, Jakub; Pérez Romero, Jordi; Sallent Roig, Oriol; Sánchez González, Juan; Umbert Juliana, Anna; Alayon Glasunov, Andrés; Almeida, Teresa (2005-10-31)
      Report de recerca
      Accés obert
      This deliverable provides a definition and a complete evaluation of the RRM/CRRM algorithms selected in D11 and D15, and evolved and refined on an iterative process. The evaluation will be carried out by means of simulations ...

    • Guaranteed bit rate traffic prioritisation and isolation in multi-tenant radio access networks 

      Vilà Muñoz, Irene; Sallent Roig, Oriol; Umbert Juliana, Anna; Pérez Romero, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés obert
      Network slicing is a key feature of forthcoming 5G systems to facilitate the partitioning of the network into multiple logical networks customised according to different operation and application needs. Network slicing ...

    • Impact analysis of training in deep reinforcement learning-based radio access network slicing 

      Vilà Muñoz, Irene; Pérez Romero, Jordi; Sallent Roig, Oriol; Umbert Juliana, Anna (2022)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Deep Reinforcement Learning (DRL) has recently emerged as a promising technique to deal with different problems in the 5G and beyond Radio Access Network (RAN). The practical implementation of DRL solutions in the real ...

    • Implementation of cognitive radio networks to evaluate spectrum management strategies in real-time 

      Raschellà, Alessandro; Umbert Juliana, Anna (2016-04-01)
      Article
      Accés obert
      This paper illustrates a Universal Software Radio Peripheral (USRP)-based real-time testbed that is able to evaluate different spectrum management solutions that exploit the Cognitive Radio (CR) paradigm. The main objective ...

    • Multi-band spectrum selection framework based on partial observations 

      Pérez Romero, Jordi; Raschellà, Alessandro; Sallent Roig, Oriol; Umbert Juliana, Anna (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The demand for higher data rates, capacity and better Quality of Service (QoS) is constantly growing; therefore, there is a pressing need for efficient use of wireless network resources. In this context, the application ...

    • On demonstrating spectrum selection functionality for opportunistic networks 

      Raschellà, Alessandro; Umbert Juliana, Anna; Pérez Romero, Jordi; Sallent Roig, Oriol (2012)
      Text en actes de congrés
      Accés obert
      This paper presents a testbed platform to demonstrate and validate spectrum opportunity identification and spectrum selection functionalities in Opportunistic Networks (ONs). The hardware component of the testbed is based ...

    • On teaching always evolving wireless technologies 

      Pérez Romero, Jordi; Sallent Roig, Oriol; Umbert Juliana, Anna; Agustí Comes, Ramon (2009)
      Text en actes de congrés
      Accés obert
      Teaching on wireless telecommunication networks faces a number of challenges, such as the fact that contents are dynamic in nature, the resulting framework is complex and heterogeneous, design principles can largely vary ...