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

Details

• Creators:
  Dailey, Daniel J.
• Corporate Creators:
  Transportation Northwest Regional Center X (TransNow) (UTC)
• Corporate Contributors:
  United States. Department of Transportation. Office of the Secretary
• Subject/TRT Terms:
  • Computer networks
  • Wireless communication systems
  • Traffic flow
  • Information processing
  • Transportation--Washington (State)--Management--Data processing
  • Traffic flow--Washington (State)--Measurement
  • Wireless communication systems
  • IEEE 802.11 (Standard)
• Publication/ Report Number:
  TNW2009-03
• Resource Type:
  Tech Report
• Geographical Coverage:
  Washington
• Edition:
  Final research report.
• Corporate Publisher:
  Transportation Northwest (TransNow) UTC
• 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.
  More +
• Format:
  PDF
• Funding:
  DTRS99-G-0010
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/17239/dot_17239_DS1.pdf
• File Type:
  [PDF - 865.09 KB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:dfd1056a681d857eab550b37a3cfe8251c219ef6d673d79b11a70874ffcff382