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September
25, 2012
U.S. Department of Transportation
•Metrics for analyzing transmit test
configuration performance
•Packet Error Rate (PER): Ratio of the number
of missed packets at a receiver from a particular transmitter and total number
of packets sent by
that transmitter
•Inter Packet Gap (IPG): Time between
successive successful packet receptions from a particular transmitter
•Position Tracking Error (TE): Difference
between a transmitter’s position and a receiver’s estimate of the transmitter’s
position
•Channel Busy Percentage (CBP): Ratio of the
time during which the wireless
channel is busy (energy level is higher than carrier sensing threshold) to the period of time over which
CBP is being measured
•Vehicle Safety Application Range Error:
Threat range error in actual warning range versus the nominal warning range assuming
fixed speed and
acceleration
V2V SAFETY COMMUNICATIONS SCALABILITY