DSRC-based adjacent channel interference prevention method and device, and application system

The invention discloses a DSRC-based adjacent channel interference prevention method and device, and an application system. The method comprises the following steps: the signal receiving step, wherein a RSU is used to receive microwave signals sent by OBUs; the positioning step, wherein the RSU is used to acquire the positioning information of the OBUs according to the microwave signals sent by the OBUs; the determining step, wherein the RSU is used to determine whether positions of the OBUs are in a default processing region according to the positioning information of the OBUs; and a processing step, wherein the RSU is used to give out a processing instruction according to a default scheme if the positions of the OBUs are in the default processing region. The method and device of the invention are used to determine whether a vehicle is a vehicle on the present channel or a vehicle on an adjacent channel through the vehicle positioning technology, and process the vehicle on the present channel according to the determination result to make the normal interaction process between the OBU on the vehicle on the present channel and the RSU will not be interfered by the OBU on vehicle on an adjacent channel, so that the vehicle adjacent channel interference problem can be effectively solved, and the probability of error handling can be reduced.