Browsing by Author "Oliver Riera, Miquel"

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  • Flow-level QoS guarantees in IEEE 802.11e EDCA-based WLANs
    Bellalta, Boris (Universitat Pompeu Fabra, 2011-04-12)
    Les xarxes WLANs possibiliten un accés de banda ampla a Internet des <br/>d'un terminal mòbil, essent una possible solució alternativa a les <br/>xarxes cel·lulars. Tanmateix, aquest tipus de tecnologia presenta certes ...
  • Hierarchical range sectoring and bidirectional link quality estimation for on-demand collections in WSNs
    Valls, Victor; Sánchez, José Luis; Cano Bastidas, Cristina; Bellalta, Boris; Oliver Riera, Miquel (Elsevier, 2013)
    The paper presents two mechanisms for designing an on-demand, reliable and efficient collection protocol for Wireless Sensor Networks. The former is the Bidirectional Link Quality Estimation, which allows nodes to easily ...
  • IEEE 802.11AH: the WiFi approach for M2M communications
    Adame, Toni; Bel, Albert; Bellalta, Boris; Barceló Vicens, Jaume; Oliver Riera, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    M2M communications are positioned to be one of the fastest growing technology segments in the next decade. Sensor and actuator networks connect communication machines and devices so that they automatically transmit ...
  • Internal logistics flow simulation: a case study in automotive industry
    Fabri Lima, Marcelus; Ramalhinho-Lourenço, Helena; Oliver Riera, Miquel; Muñoz, Juan Carlos (Taylor & Francis, 2020)
    This work focuses on internal logistics (IL), which is defined as the flows of materials inside the same business or the same plant. We centre on the IL activities of a car-assembling company. The main objective is to ...
  • Internal logistics optimization in the automotive industry
    Fabri Lima, Marcelus (Universitat Pompeu Fabra, 2020-01-27)
    This thesis focus on internal logistics flows (ILF), which is defined as the flows of materials inside the same business or the same plant. Precisely, this work approaches the ILF of SEAT, a company in the Volkswagen group. ...
  • MAC design and analysis for MU-MIMO and full-duplex enabled wireless networks
    Liao, Ruizhi (Universitat Pompeu Fabra, 2014-10-06)
    IEEE 802.11 based wireless networks, especially the infrastructure based Wireless Local Area Networks (WLANs) or Wi-Fi networks, are hugely successful, and have become an indispensable part of our life at homes and working ...
  • Mobility, citizens, innovation and technology in digital and smart cities
    Oliveira, Thays A.; Gabrich, Yuri B.; Ramalhinho-Lourenço, Helena; Oliver Riera, Miquel; Lourenço, Helena; Cohen, Miri Weiss; Satoru Ochi, Luiz; Gueye, Serigne; Protti, Fábio; Pinto, Alysson A.; Ferreira, Diógenes Viegas Mendes; Coelho, Igor Machado; Coelho, Vitor Nazário (MDPI, 2020)
    Cities are constantly transforming and, consequently, attracting efforts from researchers and opportunities to the industry. New transportation systems are being built in order to meet sustainability and efficiency criteria, ...
  • MOOCs en Cataluña: un instrumento para la innovación en educación superior
    Sancho Vinuesa, Teresa; Oliver Riera, Miquel; Gisbert Cervera, Mercè (UNED, 2015)
    El fenómeno MOOC, surgido en los Estados Unidos, está despertando un gran interés tanto entre académicos como entre responsables políticos en Europa. Aunque complejo y cambiante, este fenómeno ha creado expectativas tanto ...
  • MOOCs en España. Análisis de la demanda. Panorama actual de los Cursos Masivos Abiertos en Línea en la plataforma Miríada X
    Oliver Riera, Miquel; Hernández Leo, Davinia; Albó, Laia (2015-11)
    Este nuevo informe realizado por la Cátedra de Telefónica de la Universitat Pompeu Fabra/nrepresenta un segundo análisis del fenómeno MOOC (Massive Open Online Course) desde una/nperspectiva más centrada en la demanda de ...
  • MOOCs en España. Panorama actual de los Cursos Masivos Abiertos en Línea en las universidades españolas
    Oliver Riera, Miquel; Hernández Leo, Davinia; Daza, Vanesa; Martín i Badell, Carles; Albó, Laia (2014-01)
    Podemos afirmar que España se ha situado en muy poco tiempo, y de forma sorprendente, en el/ngrupo líder de países que más actividad están generando entorno a los cursos masivos en línea/nabiertos o MOOCs (del inglés Massive ...
  • MU-MIMO MAC protocols for wireless local area networks: a survey
    Liao, Ruizhi; Bellalta, Boris; Oliver Riera, Miquel; Niu, Zhisheng (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    As wireless devices boom and bandwidth-hungry applications (e.g., video and cloud uploading) get popular, today's wireless local area networks (WLANs) become not only crowded but also stressed at throughput. Multiuser ...
  • On the distributed construction of a collision-free schedule in multi-hop packet radio networks
    Barceló Vicens, Jaume; Bellalta, Boris; Cano Bastidas, Cristina; Faridi, Azadeh; Oliver Riera, Miquel (Springer, 2014)
    This paper introduces a protocol that distributively constructs a collision-free schedule for multi-hop packet radio networks in the presence of hidden terminals. As a preliminary step, each wireless station computes the ...
  • On the performance of packet aggregation in IEEE 802.11ac MU-MIMO WLANs
    Bellalta, Boris; Barceló Vicens, Jaume; Staehle, Dirk; Vinel, Alexey; Oliver Riera, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Multi-user spatial multiplexing combined with packet aggregation can significantly increase the performance of Wireless Local Area Networks (WLANs). In this letter, we present and evaluate a simple technique to perform ...
  • OSWALDO: observación de la docencia entre iguales
    Moreno, Verónica; Hernández Leo, Davinia; Oliver Riera, Miquel; Atienza Cerezo, Encarna (CIDUI Congrés Internacional de Docència Universitària i Innovació, 2018)
    OSWALDO nace con el objetivo de promover, facilitar y acompañar en la práctica reflexiva de la mejora docente a través de un sistema de observación entre iguales. El proyecto dispone de recursos e instrumentos de apoyo ...
  • Performance analysis of a multiuser multi-packet transmission system for WLANs in non-saturation conditions
    Bellalta, Boris; Faridi, Azadeh; Barceló Vicens, Jaume; Daza, Vanesa; Oliver Riera, Miquel (Elsevier, 2014)
    Multiuser Multi-Packet Transmission (MPT) from an Access Point (AP) equipped with multiple antennas to multiple single-antenna nodes can be achieved by exploiting the spatial dimension of the channel. In this paper we ...
  • Performance analysis of IEEE 802.11ac wireless backhaul networks in saturated conditions
    Liao, Ruizhi; Bellalta, Boris; Barceló Vicens, Jaume; Valls, Victor; Oliver Riera, Miquel (Springer, 2013)
    According to the ongoing IEEE 802.11ac amendment, the wireless network is about to embrace the gigabit-per-second raw data rate. Compared with previous IEEE standards, this significant performance improvement can be ...
  • Performance optimization of multiple interconnected heterogeneous sensor networks via collaborative information sharing
    Pal, Sougata; Oechsner, Simon; Bellalta, Boris; Oliver Riera, Miquel (IOS Press, 2013)
    Interconnecting multiple sensor networks is a relatively new research field which has emerged in the Wireless Sensor Network domain. Wireless Sensor Networks (WSNs) have typically been seen as logically separate, and few ...
  • Radio Resource Management strategies based hopfield neural networks
    Garcia Garcia, Núria, 1958- (Universitat Pompeu Fabra, 2009-05-25)
    Esta tesis doctoral se enmarca en la temática de Gestion de Recursos Radioelectricos en los sistemas de comunicaciones móviles, 3G, B3G y 4G. Como es ampliamente conocido los recursos radios son escasos, particularmente ...
  • SME’s participation to Free Libre Open Source Software Communities
    Batikas, Michail (Universitat Pompeu Fabra, 2011-07-04)
    Les motivacions entorn al programari lliure han estat sempre un tema de gran interès, sent la pregunta més obvia, "perquè les persones treballen de forma gratuïta?". Les motivacions dels desenvolupadors han estat establertes ...
  • Taking advantage of overhearing in low power listening WSNs: a performance analysis of the LWT-MAC protocol
    Cano Bastidas, Cristina; Bellalta, Boris; Sfairopoulou, Anna; Oliver Riera, Miquel; Barceló Vicens, Jaume (Springer, 2011)
    LWT-MAC is a new Low Power Listening MAC protocol for WSNs designed to rapidly react to instantaneous increases of the network load. It takes advantage of overhearing by waking up all nodes at the end of a transmission to ...