CNDS - Xarxes de Computadors i Sistemes Distribuïts

 

Les xarxes comunitàries busquen una xarxa oberta, lliure i neutral aplicant el principi de
reciprocitat a la interconnexió de nodes per la circulació de continguts i serveis. El grup
investiga on Xarxes Comunitàries (Community Networks), Computació en Núvol Comunitària
(Community Clouds) i Xarxes De Sensors Sense Fils Comunitàries (Community Wireless Sensor
Networks).

Recent Submissions

  • A data-driven framework for air quality sensor networks 

    Ferrer Cid, Pau; Paredes Ahumada, Juan Antonio; Allka, Xhensilda; Guerrero Zapata, Manel; Barceló Ordinas, José María; García Vidal, Jorge (Institute of Electrical and Electronics Engineers (IEEE), 2024-01-11)
    Article
    Open Access
    In this article, we present our research vision of a framework for obtaining quality data in air quality monitoring networks using low-cost sensors (LCSs). The use of LCS networks is gaining increasing acceptance in many ...

  • Toward smart community networks 

    Gemmi, Gabriele; Cerdà Alabern, Llorenç; Navarro Moldes, Leandro; Maccari, Leonardo (Institute of Electrical and Electronics Engineers (IEEE), 2023-03)
    Article
    Open Access
    The advent of IEEE 802.11 in the late 1990s spurred the development of new network paradigms. In particular, new technology enthusiasts saw the potential of Wi-Fi to bring broadband Internet connections to under-provisioned ...

  • IoT-based surveillance camera distribution using triangle geometry 

    Almalkawi, Islam; Al-Abed, Loiy; Al-Karaki, Jamal N.; Guerrero Zapata, Manel (Institute of Electrical and Electronics Engineers (IEEE), 2023)
    Conference lecture
    Open Access
    IoT systems provide excellent solutions to many applications in both civilian and military aspects. This is even facilitated by the advent of many types of cameras with the diminishing cost of communication devices. We ...

  • Property rights in servitisation: a practical assessment with reused computers 

    Roura Salietti, Mireya; Navarro Moldes, Leandro; Meseguer Pallarès, Roc (Springer, 2022)
    Conference report
    Open Access
    The circular economy of computers is about producing fewer, more durable and reusable products while investing in expanding their life span through a functional service economy. Reuse is often mentioned as a sustainable ...

  • Charging of the ABR service in ATM networks: a numerical example 

    Cerdà Alabern, Llorenç; Casals Torres, Olga M. (Institute of Electrical and Electronics Engineers (IEEE), 1998-04)
    Article
    Open Access
    The Available Bit Rate service (ABR) is a "best effort" service intended for traffic which imposes no bound on delay or delay variation. The network guarantees a Minimum Cell Rate (MCR) for an ABR source, which is negotiated ...

  • The effects of weight quantization on online federated learning for the IoT: a case study 

    Llisterri Giménez, Nil; Lee, Junkyu; Freitag, Fèlix; Vandierendonck, Hans (Institute of Electrical and Electronics Engineers (IEEE), 2024-01-04)
    Article
    Open Access
    Many weight quantization approaches were explored to save the communication bandwidth between the clients and the server in federated learning using high-end computing machines. However, there is a lack of weight quantization ...

  • Position paper: LoRa mesh networks for enabling distributed intelligence on tiny IoT nodes 

    Freitag, Fèlix; Miquel Solé, Joan; Meseguer Pallarès, Roc (IOS Press, 2023)
    Part of book or chapter of book
    Open Access
    LoRaWAN is a widely used solution in today’s Internet of Things (IoT) applications to connect remote sensor nodes to the Internet. At the same time, microcontroller-based sensor nodes with increased processing capacities ...

  • Server-side adaptive federated learning over wireless mesh network 

    Freitag, Fèlix; Wei, Lu; Liu, Chun-Hung; Selimi, Mennan; Veiga, Luis (Springer, 2023)
    Part of book or chapter of book
    Open Access
    In federated learning, distributed nodes train a local machine learning model and exchange it through a central aggregator. In real environments, these training nodes are heterogeneous in computing capacity and bandwidth, ...

  • Integrating a neural network library in embedded federated learning 

    Aatab, Soufiane; Freitag, Fèlix (Institute of Electrical and Electronics Engineers (IEEE), 2023)
    Conference report
    Open Access
    Federated learning has become a popular collaborative machine learning approach in which clients use their local data for training. This results in bandwidth savings since the training data does not have to be transferred ...

  • Stateful adaptive streams with approximate computing and elastic scaling 

    Francisco, João; Coimbra, Miguel E.; Neto, Pedro F.; Freitag, Fèlix; Veiga, Luis (Association for Computing Machinery (ACM), 2023)
    Conference lecture
    Open Access
    The model of approximate computing can be used to increase performance or optimize resource usage in stream and graph processing. It can be used to satisfy performance requirements (e.g., throughput, lag) in stream processing ...

  • Exploring blockchain-based management for LoRa IoT nodes 

    Cruz Harillo, Eloi; Freitag, Fèlix (Springer, 2023)
    Conference report
    Open Access
    We consider open IoT applications in which the IoT devices, i.e. sensor nodes and gateways, can be contributed by volunteer participants. Since the contribution of sensor deployments and their data is critical for the value ...

  • Robust proxy sensor model for estimating black carbon concentrations using low-cost sensors 

    Paredes Ahumada, Juan Antonio; Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge; Reche Andúgar, Cristina; Viana Rodríguez, Mar (Association for Computing Machinery (ACM), 2023)
    Conference lecture
    Open Access
    Air quality monitoring sensor networks focusing on air pollution measure pollutants that are regulated by the authorities, such as CO, NO2, NO, SO2, O3, and particulate matter (PM10, PM2.5). However, there are other ...

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