SECURITY MESSAGE TRANSMISSION METHOD AND DEVICE

摘要

The present invention relates to a security message transmission method and device, the method comprising: a vehicle-mounted terminal generates a first security message carrying message type information; according to the message type information, adding the priority indication information of a security message to a geographic information layer to obtain a second security message; determining the transmission path of the security message in a medium access control (MAC) layer according to the priority indication information; and transmitting to a receiver the second security message via a physical layer corresponding to the determined transmission path, to enable the receiver to forward the second security message. The present invention forwards the security message to the vehicle-mounted terminal in a predetermined distance range by combining VDC technology with an LTE cellular network.