Wyniki wyszukiwania dla: CLOS NETWORK

• PLOS ONE

  Czasopisma

  ISSN: 1932-6203

• Graph models of clos networks

  Publikacja

  • A. Jastrzębski

  - Rok 2007

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• Deep Learning-Based LOS and NLOS Identification in Wireless Body Area Networks

  Publikacja

  • K. Cwalina
  • P. Rajchowski
  • O. Błaszkiewicz
  • A. Olejniczak
  • J. Sadowski

  - SENSORS - Rok 2019

  In this article, the usage of deep learning (DL) in ultra-wideband (UWB) Wireless Body Area Networks (WBANs) is presented. The developed approach, using channel impulse response, allows higher efficiency in identifying the direct visibility conditions between nodes in off-body communication with comparison to the methods described in the literature. The effectiveness of the proposed deep feedforward neural network was checked on...

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• Rearrangeability in multicast Clos networks is NP-complete

  Publikacja

  • A. Jastrzębski
  • M. Kubale

  - Rok 2010

  Przestrajalność w polach Closa z połączeniami jeden do jeden jest problemem wielomianowym. W pracy pokazano, że w polach z połączeniami jeden do wiele problem ten jest NP zupełny.Three-stage elos networks are commutation networks with circuit switching. So far, graph theory has been very useful tool for solving issues related to these networks with unicast connections. This is so because if elos network is represented as a bipartite...

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• Fast Fading Influence on the Deep Learning-Based LOS and NLOS Identificationin Wireless Body Area Networks

  Publikacja

  • K. Cwalina
  • A. Olejniczak
  • O. Błaszkiewicz
  • P. Rajchowski
  • J. Sadowski

  - Rok 2021

  In the article, the fast fading influence on the proposed DL (Deep Learning) approach for LOS (Line-of-Sight) and NLOS (Non-Line-of-Sight) conditions identification in Wireless Body Area Networks is investigated. The research was conducted on the basis of the off-body communication measurements using the developed mobile measurement stand, in an indoor environment for both static and dynamic scenarios. The measurements involved...

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• Towards the boundary between easy and hard control problems in multicast Clos networks

  Publikacja

  • P. Obszarski
  • A. Jastrzębski
  • M. Kubale

  - Bulletin of the Polish Academy of Sciences-Technical Sciences - Rok 2015

  In this article we study 3-stage Clos networks with multicast calls in general and 2-cast calls, in particular. We investigate various sizes of input and output switches and discuss some routing problems involved in blocking states. To express our results in a formal way we introduce a model of hypergraph edge-coloring. A new class of bipartite hypergraphs corresponding to Clos networks is studied. We identify some polynomially...

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• A bound on the number of middle-stage crossbars in f-cast rearrangeable Clos networks

  Publikacja

  • P. Obszarski
  • M. Kubale

  - Rok 2015

  In 2006 Chen and Hwang gave a necessary and sufficient condition under which a three-stage Clos network is rearrangeable for broadcast connections. Assuming that only crossbars of the first stage have no fan-out property, we give similar conditions for f-cast Clos networks, where f is an arbitrary but fixed invariant of the network. Such assumptions are valid for some practical switching systems, e.g. high-speed crossconnects....

• NETWORKS

  Czasopisma

  ISSN: 0028-3045 , eISSN: 1097-0037

• LSTM-based method for LOS/NLOS identification in an indoor environment

  Publikacja

  • A. Olejniczak
  • O. Błaszkiewicz
  • K. Cwalina
  • P. Rajchowski
  • J. Sadowski

  - Rok 2020

  Due to the multipath propagation, harsh indoor environment significantly impacts transmitted signals which may adversely affect the quality of the radiocommunication services, with focus on the real-time ones. This negative effect may be significantly reduced (e.g. resources management and allocation) or compensated (e.g. correction of position estimation in radiolocalisation) by the LOS/NLOS identification algorithm. This paper...

• Network lifetime maximization in wireless mesh networks for machine-to-machine communication

  Publikacja

  • E. Fitzgerald
  • M. Pióro
  • A. Tomaszewski

  - Ad Hoc Networks - Rok 2019

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