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    Wyświetlanie 1-4 z 4
    Tytuł:
    On IPv6 Experimentation in Wireless Mobile Ad Hoc Networks
    Autorzy:
    Grajzer, M.
    Głąbowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/309525.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    IPv6 simulation
    IPv6 wireless testbed
    MANET experimentation
    MANET protocols evaluation
    Neighbor Discovery ++ (ND++)
    NS-3
    Opis:
    With the growing interest towards the Internet of Things IPv6-based mobile ad hoc networks (MANETs) become a key enabling technology offering the possibility of automated, unsupervised network configuration and operation. Such a functionality calls for an accurate and reliable testing of the newly proposed solutions, which is challenging due to the dynamic, decentralized and ad hoc nature of MANETs. In this work selected topics are presented on performing IPv6 protocols experimentation in wireless, IPv6-only mobile ad hoc networks – including both simulation – and testbed-based evaluation. Based on the authors experience with the evaluation of the extended IPv6 Neighbor Discovery protocol (ND++) proposed during the course of research, the selection of an opensource simulation environment is presented and a comparison between simulation and emulation experimentation methods is provided. Benefits and drawbacks of both these methodologies for testing IPv6 solutions are depicted. Moreover, the important aspects of topology and mobility considerations are considered. Finally the authors pro.ose a testing approach that would allow for a detailed and accurate evaluation by means of open-source, easily accessible and low-cost methodologies.
    Źródło:
    Journal of Telecommunications and Information Technology; 2014, 3; 71-81
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recurrent Method for Blocking Probability Calculation in Switching Networks with Overflow Links
    Autorzy:
    Głąbowski, M.
    Stasia, M. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/307836.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    intersection links
    switching networks
    Opis:
    This article presents a new recurrent method for modelling multi-service switching networks with overflow links. In the proposed method, the blocking probability for a given stage of the switching network is determined on the basis of the characteristics of the preceding stage. A particular attention is given to a possibility of a considerable reduction of the internal blocking probability of the switching network that would result from an application of additional overflow links between neighbouring switches of the first stage of the network. The results of the analytical modelling of selected multi-service switching networks with overflow links in the first stage are compared with the results of the simulation experiments. The study confirms the accuracy of all the adopted theoretical assumptions in the proposed analytical model of the multi-service switching network.
    Źródło:
    Journal of Telecommunications and Information Technology; 2013, 1; 56-64
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Packet switch architecture with multiple output queueing
    Autorzy:
    Danilewicz, G.
    Głąbowski, M.
    Kabaciński, W.
    Kleban, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/308342.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    high-speed packet switching
    output queueing
    buffer
    switch fabric
    switching node
    multicast
    Opis:
    In this paper the new packet switch architecture with multiple output queuing (MOQ) is proposed. In this architecture the nonblocking switch fabric, which has the capacity of N _N2 N2, and output buffers arranged into N separate queues for each output, are applied. Each of N queues in one output port stores packets directed to this output only from one input. Both switch fabric and buffers can operate at the same speed as input and output ports. This solution does not need any speedup in the switch fabric as well as arbitration logic for taking decisions which packets from inputs will be transferred to outputs. Two possible switch fabric structures are considered: the centralized structure with the switch fabric located on one or several separate boards, and distributed structure with the switch fabric distributed over line cards. Buffer arrangements as separate queues with independent write pointers or as a memory bank with one pointer are also discussed. The mean cell delay and cell loss probability as performance measures for the proposed switch architecture are evaluated and compared with performance of OQ architecture and VOQ architecture. The hardware complexity of OQ, VOQ and presented MOQ are also compared. We conclude that hardware complexity of proposed switch is very similar to VOQ switch but its performance is comparable to OQ switch.
    Źródło:
    Journal of Telecommunications and Information Technology; 2004, 4; 76-83
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
      Wyświetlanie 1-4 z 4

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