Simulation and experimental study of 802.11 based networking for vehicular management and safety.
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Simulation and experimental study of 802.11 based networking for vehicular management and safety.

Filetype[PDF-865.09 KB]


  • English

  • Details:

    • Publication/ Report Number:
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    • Edition:
      Final research report.
    • NTL Classification:
      NTL-OPERATIONS AND TRAFFIC CONTROLS-Traffic Flow ; NTL-SAFETY AND SECURITY-Highway Safety ;
    • Abstract:
      This work focuses on the use of wireless networking techniques for their potential impact in providing

      information for traffic management, control and public safety goals. The premise of this work is based on the

      reasonable expectation that vehicles in the near future will be equipped with integrated wireless communication

      and positioning capabilities, enabling vehicle-to-vehicle (v2v) and vehicle-to-roadside (v2r) communications

      based on the emerging IEEE 802.11a/RA standard.

      This project focused on the experimental aspect of short range communication between a moving vehicle and a

      stationary receiver. The accumulated measurements of signal to noise ratio fit a single line of site model rather

      well with the implication that the communications channel will function best as the distance between the radios

      is reduced. However, measurements of both bandwidth and packet loss suggest that when the vehicle passes

      nearby the stationary receiver at approximately the planned speeds (10 or 20 MPH) that the communication

      channel throughput is reduced. The present hypothesis for the cause is that the Doppler effect reduces the

      channel throughput. It is recommended that a representation of the vector velocity as a function of time be

      compared to the throughput measurements to confirm this hypotheses. Further, this observation of a deviation

      from a distance based channel model is important in future modeling for inter-vehicle communication as most

      present models used to combine traffic motion and network throughput do not account for this dominant effect.

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