Vehicle Density Based Forwarding Protocol for Safety Message Broadcast in VANET

Table 1

Road traffic parameters and MAC protocol setting.

Parameter and setting	Value
Vehicle density 𝛼	25, 100, and 175 vel/km/lane
Vehicle speed 𝑣	80 km/h
Road length 𝐿	5000 m
Number of lanes	4
Transmission range 𝑅	300 m
Channel propagation	Two-ray ground
Time slot 𝜎	20 𝜇 s
DIFS time 𝜎𝐷	50 𝜇 s
CWmin	31 slots
CWmax	1023 slots
Wireless transmission rate 𝑟	1 Mbps
Simulation time	70 sec