Exploració per autor "Umbert Juliana, Anna"
Ara es mostren els items 36-54 de 54
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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'editorialDeep 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 obertThis 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'editorialThe 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 obertThis 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 obertTeaching 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 obertMultimedia 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 obertThe 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'editorialThis 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 obertIn 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'editorialThe 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'editorialRadio 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 obertThis 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 obertUna 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'editorialThe 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 obertDeliverable 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'editorialIn 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'editorialIn 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 ...