Browsing by Author "Bellalta, Boris"

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  • Electromagnetic modeling of holographic intelligent reflecting surfaces at Terahertz bands
    Dovelos, Konstantinos; Assimonis, Stylianos D.; Ngo, Hien Quoc; Bellalta, Boris; Matthaiou, Michail (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    Intelligent reflecting surface (IRS)-assisted wireless communication is widely deemed a key technology for 6G systems. The main challenge in deploying an IRS-aided terahertz (THz) link, though, is the severe propagation ...
  • An energy consumption model for IEEE 802.11ah WLANs
    Bel, Albert; Adame, Toni; Bellalta, Boris (Elsevier, 2018)
    One of the main challenges when designing a new self-powered Low Power Wide Area Network (LPWAN) technology is the vast operational dependence on its scarce energy resources. Therefore, a thorough identification and ...
  • ETSI DCC: Decentralized Congestion Control in C-ITS
    Lyamin, Nikita; Vinel, Alexey; Smely, Dieter; Bellalta, Boris (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    ETSI DCC: Decentralized Congestion Control in C-ITS is a mandatory component of the 5.9 GHz ITS-G5 vehicular communication protocol stack that reduces radio channel overload, range degradation, and self interference. In ...
  • Evaluación del curso de introducción a la universidad (INECE’08)
    Moreno, Verónica; Frangi Caregnato, Alejandro; Bellalta, Boris; Piella Fenoy, Gemma; Infante, Jorge (2009-07-03)
    El Curso de Introducción a la Universidad (CIU) se desarrolla en/nla Escuela Superior Politécnica de la Universidad Pompeu Fabra con la intención de alcanzar dos objetivos: (I) ofrecer a los nuevos información sobre las ...
  • A flexible machine-learning-aware architecture for future WLANs
    Wilhelmi Roca, Francesc; Barrachina Muñoz, Sergio; Bellalta, Boris; Cano Bastidas, Cristina; Jonsson, Anders, 1973-; Ram, Vishnu (Institute of Electrical and Electronics Engineers (IEEE), 2020)
    Lots of hopes have been placed on machine learning (ML) as a key enabler of future wireless networks. By taking advantage of large volumes of data, ML is expected to deal with the ever-increasing complexity of networking ...
  • 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 ...
  • Game theory for energy efficiency in wireless sensor networks: latest trends
    AlSkaif, Tarek; Guerrero Zapata, Manel; Bellalta, Boris (Elsevier, 2015)
    In the area of Wireless Sensor Networks (WSNs), improving energy efficiency and network lifetime is one of the most important and challenging issues. Most of the considered WSNs are formed by nodes with limited resources, ...
  • HARE: supporting efficient uplink multi-hop communications in self-organizing LPWANs
    Vázquez, Toni Adame; Barrachina Muñoz, Sergio; Bellalta, Boris; Bel, Albert (MDPI, 2018)
    The emergence of low-power wide area networks (LPWANs) as a new agent in the Internet of Things (IoT) will result in the incorporation into the digital world of low-automated processes from a wide variety of sectors. The ...
  • 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 ...
  • A high efficiency MAC protocol for WLANs: providing fairness in dense scenarios
    Sanabria Russo, Luis; Barceló Vicens, Jaume; Bellalta, Boris; Gringoli, Francesco (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Collisions are a main cause of throughput degradation in wireless local area networks. The current contention mechanism used in the IEEE 802.11 networks is called carrier sense multiple access with collision avoidance ...
  • 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 ...
  • IEEE 802.11ax: high-efficiency WLANs
    Bellalta, Boris (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    IEEE 802.11ax-2019 will replace both IEEE 802.11n-2009 and IEEE 802.11ac-2013 as the next high-throughput WLAN amendment. In this article, we review the expected future WLAN scenarios and use cases that justify the push ...
  • IEEE 802.11be multi-link operation: when the best could be to use only a single interface
    López Raventós, Álvaro; Bellalta, Boris (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    The multi-link operation (MLO) is a new feature proposed to be part of the IEEE 802.11be Extremely High Throughput (EHT) amendment. Through MLO, access points and stations will be provided with the capabilities to transmit ...
  • Implications of decentralized Q-learning resource allocation in wireless networks
    Wilhelmi Roca, Francesc; Bellalta, Boris; Cano Bastidas, Cristina; Jonsson, Anders, 1973- (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Reinforcement Learning is gaining attention by the wireless networking community due to its potential to learn good-performing configurations only from the observed results. In this work we propose a stateless variation ...
  • Increasing LPWAN scalability by means of concurrent multiband IoT technologies: an industry 4.0 use case
    Adame, Toni; Bel, Albert; Bellalta, Boris (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    One of the most important challenges of the Internet of Things (IoT) in the next years will be the smooth incorporation of millions of smart devices into its communications paradigm. The greater coverage area of sub-1-GHz ...
  • Intelligent reflecting surface-aided wideband THz communications: modeling and analysis
    Dovelos, Konstantinos; Assimonis, Stylianos D.; Ngo, Hien Quoc; Bellalta, Boris; Matthaiou, Michail (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    In this paper, we study the performance of wideband terahertz (THz) communications assisted by an intelligent reflecting surface (IRS). Specifically, we first introduce a generalized channel model that is suitable for ...
  • Intelligent reflecting surfaces at terahertz bands: channel modeling and analysis
    Dovelos, Konstantinos; Assimonis, Stylianos D.; Ngo, Hien Quoc; Bellalta, Boris; Matthaiou, Michail (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    An intelligent reflecting surface (IRS) at terahertz (THz) bands is expected to have a massive number of reflecting elements to compensate for the severe propagation losses. However, as the IRS size grows, the conventional ...
  • Learning optimal routing for the uplink in LPWANs using similarity-enhanced e-greedy
    Barrachina Muñoz, Sergio; Bellalta, Boris (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Despite being a relatively new communication technology, Low-Power Wide Area Networks (LPWANs) have shown their suitability to empower a major part of Internet of Things applications. Nonetheless, most LPWAN solutions are ...
  • 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 ...
  • 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 ...