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

Dailey, Daniel J.; Transportation Northwest Regional Center X (TransNow) (UTC)

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

2009-03-01
By Dailey, Daniel J.

[PDF-865.09 KB]

English

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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 IEEE 802.11 (Standard) Information Processing Traffic Flow Traffic Flow--Washington (State)--Measurement Transportation--Washington (State)--Management--Data Processing Wireless Communication Systems
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.
Format:

PDF
Funding:

DTRS99-G-0010
Collection(s):

University Transportation Centers US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:dfd1056a681d857eab550b37a3cfe8251c219ef6d673d79b11a70874ffcff382
Download URL:

https://rosap.ntl.bts.gov/view/dot/17239/dot_17239_DS1.pdf
File Type:

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

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