Browsing by Author "Bellalta, Boris"

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  • A comparative survey of adaptive codec solutions for VoIP over multirate WLANs: a capacity versus quality performance trade-off
    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 ...
  • A cross-layer mechanism for QoS improvements in VoIP over multi-rate WLAN networks
    Sfairopoulou, Anna (Universitat Pompeu Fabra, 2011-04-12)
    In IEEE 802.11 WLANs, Link Adaptation mechanisms, which choose the transmission rate of each node, provoke unexpected and random variations on the effective channel capacity. When these changes are towards lower bitrates, ...
  • A low power listening with wake up after transmissions MAC protocol for WSNs
    Cano Bastidas, Cristina (Universitat Pompeu Fabra, 2011-03-04)
    In the last few years Wireless Sensor Networks (WSNs) have become an interesting field of research mainly due to the challenges and constraints of their design and the broad range of potential applications they can provide. ...
  • A self-organizing management platform for wireless sensor networks
    Cao Minh, Trang (Universitat Pompeu Fabra, 2014-09-25)
    Through advances in sensor, networking, semiconductor and energy storage technologies, Wireless Sensor Networks (WSNs) are increasingly being deployed in many important applications to enable users to access information ...
  • Adapting sampling interval of sensor networks using on-line reinforcement learning
    Martins Dias, Gabriel; Nurchis, Maddalena; Bellalta, Boris (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Monitoring Wireless Sensor Networks (WSNs) are composed of sensor nodes that report temperature, relative humidity, and other environmental parameters. The time between two successive measurements is a critical parameter ...
  • An experimental study of latency for IEEE 802.11be multi-link operation
    Carrascosa Zamacois, Marc; Geraci, Giovanni; Knightly, Edward; Bellalta, Boris (Institute of Electrical and Electronics Engineers (IEEE), 2022)
    Will Multi-Link Operation (MLO) be able to improve the latency of Wi-Fi networks? MLO is one of the most disruptive MAC-layer techniques included in the IEEE 802.11be amendment. It allows a device to use multiple radios ...
  • Analysis of dynamic channel bonding in dense networks of WLANs
    Faridi, Azadeh; Bellalta, Boris; Checco, Alessandro (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Dynamic Channel Bonding (DCB) allows for the dynamic selection and use of multiple contiguous basic channels in Wireless Local Area Networks (WLANs). A WLAN operating under DCB can enjoy a larger bandwidth, when available, ...
  • An approximate queueing model for multi-rate multi-user MIMO systems
    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) ...
  • Channel estimation and hybrid combining for wideband terahertz massive MIMO systems
    Dovelos, Konstantinos; Matthaiou, Michail; Ngo, Hien Quoc; Bellalta, Boris (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    Terahertz (THz) communication is widely considered as a key enabler for future 6G wireless systems. However, THz links are subject to high propagation losses and inter-symbol interference due to the frequency selectivity ...
  • Channel load aware AP / extender selection in home WiFi networks using IEEE 802.11k/v
    Adame, Toni; Carrascosa Zamacois, Marc; Bellalta, Boris; Pretel, Iván; Etxebarria, Iñaki (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    Next-generation Home WiFi networks have to step forward in terms of performance. New applications such as on-line games, virtual reality or high quality video contents will further demand higher throughput levels, as well ...
  • Cloud-gaming: analysis of Google Stadia traffic
    Carrascosa Zamacois, Marc; Bellalta, Boris (Elsevier, 2022)
    Interactive, real-time, and high-quality cloud video games pose a serious challenge to the Internet due to simultaneous high-throughput and low round trip delay requirements. In this paper, we investigate the traffic ...
  • Collaborative spatial reuse in wireless networks via selfish multi-armed bandits
    Wilhelmi Roca, Francesc; Cano Bastidas, Cristina; Neu, Gergely; Bellalta, Boris; Jonsson, Anders, 1973-; Barrachina Muñoz, Sergio (Elsevier, 2019)
    Next-generation wireless deployments are characterized by being dense and uncoordinated, which often leads to inefficient use of resources and poor performance. To solve this, we envision the utilization of completely ...
  • Collision-free WLANs: from concepts to working protocols
    Sanabria Russo, Luis (Universitat Pompeu Fabra, 2016-10-21)
    Using a deterministic backoff after successful transmissions as a distributed contention mechanism for access to the channel can draw benefits from scheduled operation, like the elimination of simultaneous transmissions, ...
  • Combining software defined networks and machine learning to enable self organizing WLANs
    López Raventós, Álvaro; Wilhelmi Roca, Francesc; Barrachina Muñoz, Sergio; Bellalta, Boris (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    Next generation of wireless local area networks (WLANs) will operate in dense, chaotic and highly dynamic scenarios that in a significant number of cases may result in a low user experience due to uncontrolled high ...
  • Concurrent decentralized channel allocation and access point selection using multi-armed bandits in multi BSS WLANs
    López Raventós, Álvaro; Bellalta, Boris (Elsevier, 2020)
    Enterprise Wireless Local Area Networks (WLANs) consist of multiple Access Points (APs) covering a given area. In these networks, interference is mitigated by allocating different channels to neighboring APs. Besides, ...
  • Cooperative awareness in VANETs: on ETSI EN 302 637-2 performance
    Lyamin, Nikita; Vinel, Alexey; Jonsson, Magnus; Bellalta, Boris (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Cooperative awareness on the road is intended to support the road users by providing knowledge about the surroundings and relies on the information exchange enabled by vehicular communications. To achieve this goal the ...
  • El curso de introducción a la universidad como estrategia organizativa para acercar al estudiantado de nueva incorporación a la Escuela Superior Politécnica.
    Moreno, Verónica; Frangi Caregnato, Alejandro; Piella Fenoy, Gemma; Infante, Jorge; Bellalta, Boris (2009-07-03)
    En esta comunicación se presenta el proceso completo de diseño del Curso de Introducción a la Universidad (CIU) que se imparte en la Escuela Superior Politécnica de la Universidad Pompeu Fabra para los estudios de Ingeniería ...
  • A distributed power sharing framework among households in microgrids: a repeated game approach
    AlSkaif, Tarek; Guerrero Zapata, Manel; AlSkaif, Tarek; Bellalta, Boris; Nilsson, Anders (Springer, 2016)
    In microgrids, the integration of distributed energy resources (DERs) in the residential sector can improve power reliability, and potentially reduce power demands and carbon emissions. Improving the utilization of renewable ...
  • Dynamic traffic allocation in IEEE 802.11be multi-Link WLANs
    López Raventós, Álvaro; Bellalta, Boris (Institute of Electrical and Electronics Engineers (IEEE), 2022)
    The multi-link operation (MLO) is a key feature of the next IEEE 802.11be Extremely High Throughput amendment. Through its adoption, it is expected to enhance users’ experience by improving throughput rates and latency. ...
  • ECTS: enhanced centralized TSCH scheduling with packet aggregation for industrial IoT
    Michaelides, Michael; Adame, Toni; Bellalta, Boris (Institute of Electrical and Electronics Engineers (IEEE), 2022)
    The Industrial Internet of Things (IoT) has gained a lot of momentum thanks to the introduction of Time Slotted Channel Hopping (TSCH) in IEEE 802.15.4. At last, we can enjoy collision-free, low-latency wireless communication ...