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Browsing Departament de Tecnologies de la Informació i les Comunicacions by Author "Oliver Riera, Miquel"

Browsing Departament de Tecnologies de la Informació i les Comunicacions by Author "Oliver Riera, Miquel"

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  • Sfairopoulou, Anna; Bellalta, Boris; Macián, Carlos; Oliver Riera, Miquel (Springer Verlag, 2010)
    In multi-rate WLANs, users can suffer transmission rate changes due to the link adaptation mechanism. This results in a variable capacity channel, which is very hostile for VoIP and can cause serious quality of service ...
  • Bellalta, Boris; Daza, Vanesa; Oliver Riera, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 2011)
    A queueing model for Multi-rate Multi-user MIMO systems is presented. The model is built upon the assumption that the probability distribution of available destinations among the buffered frames at the Base Station (BS) ...
  • Albó, Laia; Hernández Leo, Davinia; Oliver Riera, Miquel (2016)
    Most MOOCs offer open learning opportunities at Higher Education (HE) level./nHowever, it is still unclear how HE students are taking this type of course. This/nstudy focuses on the profile of HE students participating in ...
  • Albó, Laia; Hernández Leo, Davinia; Oliver Riera, Miquel (CEUR Workshop Proceedings, 2015)
    Blended Massive Open Online Courses (bMOOCs) have arisen as a blended learning strategy that combines the use of MOOC platform-supported activities and video-based content with in-class face-to-face activities in Higher ...
  • Oliveira, Thays A.; Oliver Riera, Miquel; Ramalhinho-Lourenço, Helena (MDPI, 2020)
    The way citizens interact with cities affects overall life quality. Their participation in social decisions is of paramount importance for helping on public decisions that affect governance, regulation and education. This ...
  • Platt, Steven; Oliver Riera, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    While direct allocation of spectrum and evolved medium access protocols provide a base for ubiquitous wireless connectivity, the existing TCP/IP and OSI models were designed for wired networks and do not address open ...
  • 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 ...
  • 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, ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Barceló Vicens, Jaume; Bellalta, Boris; Cano Bastidas, Cristina; Sfairopoulou, Anna; Oliver Riera, Miquel; Verma, Kshitiz (Springer Verlag, 2011)
    Carrier sense multiple access with enhanced collision avoidance (CSMA/ECA) is a distributed MAC protocol that allows collisionfree/naccess to the medium in WLANs. The only difference between CSMA/ECA and the well-known ...
  • Platt, Steven; Oliver Riera, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    Distributed consensus mechanisms have been widely researched and made popular with a number of blockchain-based token applications, such as Bitcoin, and Ethereum. Although these ...
  • Liao, Ruizhi; Bellalta, Boris; Cao, Trang Minh; Barceló Vicens, Jaume; Oliver Riera, Miquel (Springer, 2015)
    Due to the dominance of the downlink traffic in Wireless Local Area Networks (WLANs), a large number of previous research efforts have been put to enhance the downlink transmission, namely, from the Access Point (AP) to ...

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