Ara es mostren els items 39-54 de 54

    • 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 ...
    • On the impact of the user terminal velocity on HSPA performance in MBMS multicast mode 

      Raschellà, Alessandro; Umbert Juliana, Anna; Araniti, Giuseppe; Iera, Antonio; Molinaro, Antoniella (IEEE, 2009)
      Comunicació de congrés
      Accés obert
      Multimedia Broadcast/Multicast Services (MBMS), introduced in Universal Mobile Telecommunication System (UMTS), have the aim to allow transmissions from a single source entity to multiple destinations. From the radio ...
    • On the optimization of power assignment to support multicast applications in HAP-based systems 

      Araniti, Giuseppe; Iera, Antonio; Molinaro, Antonella; Raschellà, Alessandro; Umbert Juliana, Anna (2010)
      Text en actes de congrés
      Accés obert
      The goal of this research work is to investigate how efficient High Altitude Platforms (HAPs) can be in supporting Multimedia Broadcast/Multicast Service (MBMS) in scenarios in which the terrestrial coverage is not ...
    • On the use of indoor radio environment maps for hetnets deployment 

      Umbert Juliana, Anna; Pérez Romero, Jordi; Casadevall Palacio, Fernando José; Kliks, Adrian; Kryszkiewicz, Pawel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This work analyses the feasibility of building an indoor Radio Environment Map (REM) for supporting the deployment of indoor small cells acting as secondary transmitters in the TVWS band. For that purpose, it proposes a ...
    • Performance analysis of satellite-HSDPA transmissions in emergency networks 

      Raschellà, Alessandro; Araniti, Giuseppe; Umbert Juliana, Anna; Iera, Antonio; Molinaro, Antonella (2011)
      Text en actes de congrés
      Accés obert
      In this work we are interested to investigate how the Geostationary (GEO) satellite can be used to employ efficiently High Speed Downlink Packet Access (HSDPA) technology supporting Multimedia Broadcast/Multicast Service ...
    • Performance measurements-based estimation of radio resource requirements for slice admission control 

      Vilà Muñoz, Irene; Pérez Romero, Jordi; Sallent Roig, Oriol; Umbert Juliana, Anna; Ferrús Ferré, Ramón Antonio (2019)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The network slicing capability introduced in 5G systems facilitates the realisation of flexible multi-tenant networks. Network slicing enables the partition of a common shared network in several logical networks, each ...
    • RAN slicing for multi-tenancy support in a WLAN scenario 

      Koutlia, Katerina; Umbert Juliana, Anna; García Escriche, Sergio; Casadevall Palacio, Fernando José (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      Radio Access Network (RAN) slicing is a key technology, based on Software Defined Networks (SDN) and Network Function Virtualization (NFV), which aims at providing a more efficient utilization of the available network ...
    • 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)
      Comunicació de congrés
      Accés obert
      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 ...
    • Red de acceso radio para el sistema de comunicaciones móviles de tercera generación (UMTS) 

      Umbert Juliana, Anna; Díaz Romero, M. del Pilar (ETSETB UPC, 2000)
      Text en actes de congrés
      Accés obert
      Una de las principales actividades que actualmente se están realizando en el mundo de las telecomunicaciones es la estandarización del sistema de comunicaciones móviles de tercera generación. Puesto que el futuro sistema ...
    • REM-based real time testbed: a proof of concept on the benefits of using REM for improving radio resource management capabilities 

      Casadevall Palacio, Fernando José; Umbert Juliana, Anna (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The knowledge of the statistical characterization of the primary user activity can make more efficient the spectrum selection techniques, which are a key technology to improve the Cognitive Radio (CR) systems performance. ...
    • Results analysis and validation - D5.3 

      Moreno, Oscar; González, José Luis; Pérez Romero, Jordi; Sallent Roig, Oriol; Raschellà, Alessandro; Umbert Juliana, Anna; Gebert, Jens; Fuchs, Rolf; Demestichas, Panagiotis; Georgakopoulos, Andreas; Stavroulaki, Vera; Tsagkaris, Kostas; Kritikou, Yiouli; Tzifa, Lia; Koutsouris, Nikos; Karvounas, Dimitrios; Logothetis, Marios; Sarli, Asimina; Bantouna, Aimilia; Papadopoulou, Louisa-Magdalene; Galani, Aristi; Vlacheas, Panagiotis; Morakos, Petros; Antzoulatos, Alexandros; Mueck, Markus; Drewes, Christian; Nehring, Florian; Moser, Guenter; Tosic, Milenko; Boskovic, Dragan; Ikovic, Ognjen; Cirilovic, Mirko; Vahid, Seiamak; Ghoraishi, Mir; Pega, Stéphane; Bourdellès, Michel; Bagayoko, Abdoulaye; Mouton, Christian; Panaitopol, Dorin; Delsol, Thomas (2012-12-31)
      Report de recerca
      Accés obert
      Deliverable D5.3 del projecte OneFIT
    • Simulador de sistemas GPRS para Telefónica : guía de los modelos de tráfico 

      Umbert Juliana, Anna; Casadevall Palacio, Fernando José (2003-07)
      Report de recerca
      Accés restringit per acord de confidencialitat
    • Simulador de sistemas GPRS para Telefónica : manual de usuario 

      Umbert Juliana, Anna; Casadevall Palacio, Fernando José (2003-07)
      Report de recerca
      Accés restringit per acord de confidencialitat
    • Spectrum occupancy in big cities - comparative study: measurement campaigns in Barcelona and Poznan 

      Kliks, Adrian; Kryszkiewicz, Pawel; Pérez Romero, Jordi; Umbert Juliana, Anna; Casadevall Palacio, Fernando José (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper a comparative study of two measurement campaigns carried out in Barcelona, Spain, and Pozna, Poland, to identify spectrum occupancy in different bands, is presented. In both cases the measurement setup ...
    • TVWS indoor measurements for HetNets 

      Kliks, Adrian; Kryszkiewicz, Pawel; Umbert Juliana, Anna; Pérez Romero, Jordi; Casadevall Palacio, Fernando José (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper the results of intensive measurement campaigns performed inside the buildings in two locations (Poznan, Poland and Barcelona, Spain) are presented and analyzed to investigate their potential in the generation ...