Participating vehicles and egress points communicate with each other
according to an infrastructure mode. Participating vehicles communicate
with other participating vehicles according to an ad-hoc mode. In an
infrastructure mode packet transmitting method for a participating
vehicle, beacon service table packets, vehicle service table packets, or
packet bursts are created and transmitted. In an infrastructure mode
packet receiving method for a participating vehicle, beacon service table
packets, vehicle service table packets, packet bursts, or negative
acknowledgement packets are received. In an infrastructure mode packet
transmitting method for an egress point, an enhanced beacon packet or a
negative acknowledgement packet is created and transmitted. In an
infrastructure mode packet receiving method for an egress point, beacon
service table packets, vehicle service table packets, or packets bursts
are received. In an ad-hoc mode packet transmitting method for a
participating vehicle, beacon service table packets, vehicle service table
packets, packet bursts, or positive acknowledgement packets are created
and transmitted. In an ad-hoc mode packet receiving method for a
participating vehicle, beacon service table packets, vehicle service table
packets, packet bursts, or positive acknowledgement packets are received.
