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    Wyświetlanie 1-4 z 4
    Tytuł:
    Traffic Modeling in Industrial Ethernet Networks
    Autorzy:
    Głąbowski, M.
    Hanczewski, S.
    Stasiak, M.
    Weissenberg, M.
    Zwierzykowski, P.
    Bai, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/226457.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    internet of things
    traffic modeling
    industrial Ethernet network
    Opis:
    This article discusses the traffic types typically used in industrial networks. The authors propose a number of methods of generating traffic that can be used in modeling traffic sources in the networks under consideration. The proposed traffic models have been developed on the basis of the ON/OFF model. The proposed solutions can be applied to model typical traffic types that are used in industrial systems, such as Time-Triggered (TT) traffic, Audio-Video Bridging (AVB) traffic or Best Effort traffic. The article discusses four traffic models with modifications and shows how the proposed models can be used in modeling different traffic types used in industrial networks.
    Źródło:
    International Journal of Electronics and Telecommunications; 2020, 66, 1; 145-153
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mode selection, caching and physical layer security for fog networks
    Autorzy:
    Basir, Rabeea
    Chughtai, Naveed Ahmad
    Ali, Mudassar
    Qaisar, Saad
    Hashmi, Anas
    Powiązania:
    https://bibliotekanauki.pl/articles/2173711.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    IoT
    Internet of Things
    fog network
    secrecy
    optimization
    Internet Rzeczy
    mgła obliczeniowa
    tajność
    optymalizacja
    Opis:
    Fog networks facilitate ultra-low latency through the use of data availability near the network edge in fog servers. Existing work in fog networks considers the objective of energy efficiency and low latency for internet-of-things (IoT) for resource allocation. These works provide solutions to energy efficiency and low latency resource allocation problem without consideration of secure communication. This article investigates the benefits of fog architecture from the perspective of three promising technologies namely device-to-device (D2D) communication, caching, and physical layer security. We propose security provisioning followed by mode selection for D2D-assisted fog networks. The secrecy rate maximization problem is formulated first, which belongs to mixed-integer nonlinear programming (MINLP) problem. It is NP-hard, that is why an exhaustive search for finding the solution is complex. Keeping in view the complexity, a nonlinear technique namely outer approximation algorithm (OAA) is applied. OAA is a traditional algorithm, whose results are compared with the proposed heuristic algorithm, namely the security heuristic algorithm (SHA). Performance of the network is observed for the different numbers of eavesdroppers, IoT nodes, and fog nodes.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 5; art. no. e142652
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Matching-Based Virtual Network Function Embedding for SDN-Enabled Power Distribution IoT
    Autorzy:
    Li, Xiaoyue
    Chen, Xiankai
    Zhou, Chaoqun
    Liang, Zilong
    Liu, Shubo
    Yu, Qiao
    Powiązania:
    https://bibliotekanauki.pl/articles/2055212.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    power distribution internet of things
    software defined networking
    virtual service orchestration
    virtual network function embedding
    priority-aware
    matching theory
    Opis:
    The power distribution internet of things (PD-IoT) has the complex network architecture, various emerging services, and the enormous number of terminal devices, which poses rigid requirements on substrate network infrastructure. However, the traditional PD-IoT has the characteristics of single network function, management and maintenance difficulties, and poor service flexibility, which makes it hard to meet the differentiated quality of service (QoS) requirements of different services. In this paper, we propose the software-defined networking (SDN)- enabled PD-IoT framework to improve network compatibility and flexibility, and investigate the virtual network function (VNF) embedding problem of service orchestration in PD-IoT. To solve the preference conflicts among different VNFs towards the network function node (NFV) and provide differentiated service for services in various priorities, a matching-based priority-aware VNF embedding (MPVE) algorithm is proposed to reduce energy consumption while minimizing the total task processing delay. Simulation results demonstrate that MPVE significantly outperforms existing matching algorithm and random matching algorithm in terms of delay and energy consumption while ensuring the task processing requirements of high-priority services.
    Źródło:
    International Journal of Electronics and Telecommunications; 2021, 67, 4; 647--653
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ekologia polityczna powietrza: o uwidzialnianiu miejskiego ryzyka
    The Political Ecology of the Air: Making Urban Risk Visible
    Autorzy:
    Bojadżijewa, Iwona
    Powiązania:
    https://bibliotekanauki.pl/articles/1373328.pdf
    Data publikacji:
    2016-05-23
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    actor-network theory
    risk
    agency of things
    urban conflicts
    assemblages
    teoria aktora-sieci
    ryzyko
    sprawczość rzeczy
    konflikty miejskie
    asamblaże
    Opis:
    In this text the author attempts to reconstruct contemporary disputes about air quality in Poland using the language of actor-network theory (ANT). The purpose is to show the process of making urban risk visible—in this instance, the risk of polluted air—through the development of hybrid alliances and the formulation of translations aimed at the final elimination of air pollution. The article consists of three parts and a theoretical introduction in which the author discusses the basic tools and concepts of ANT, as well as Latour’s programme of political ecology. In the first part, the author sketches the map of actors and actants involved in air-pollution discussions. Then she examines the role of things—material objects—in air pollution conflicts, with special emphasis on the agency of these non-human actants. Finally, she focuses on alternative translations, which are attempts to negotiate smog’s place in the hierarchy of the collective.
    Źródło:
    Kultura i Społeczeństwo; 2016, 60, 2; 35-53
    2300-195X
    Pojawia się w:
    Kultura i Społeczeństwo
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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