Vehicle on-board unit
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United States of America Patent
Stats
-
Oct 7, 2008
Grant Date -
Apr 12, 2007
app pub date -
Oct 11, 2005
filing date -
Oct 11, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A vehicle on-board unit comprises a short range wireless broadcasting section, a vehicle identifier receiving section, a vehicle identifier counting section and a communication congestion determining section. The short range wireless broadcasting section is configured to broadcast a host vehicle identifier of a host vehicle equipped with the vehicle on-board unit. The vehicle identifier receiving section is configured to receive neighboring vehicle identifiers relating to neighboring vehicles located within a prescribed communication region around the host vehicle. The vehicle identifier counting section is configured to determine a number of the neighboring vehicle identifiers received by the vehicle identifier receiving section within a prescribed period of time. The communication congestion determining section is configured to determine a congestion condition of short range wireless communications within the prescribed communication region based on the number of the neighboring vehicle identifiers determined in the vehicle identifier counting section.
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