VANET	Vehicle ad-hoc network
V2V	Vehicle-to-vehicle
V2I	Vehicle-to-Infrastructure
RSU	Road side unit
OBU	On-board unit
CCM	Central control module
TA	Trusted Authority
DSRC	Dedicated short-range communication
DOS	Denial-of-service
DDOS	Distributed denial-of-service
PDR	Packet delivery ratio
PD	Processing delay