According to another embodiment of the present disclosure, the controller may control the WAVE-V2X communication module and the LTE-V2X communication module to process both the WAVE-V2X signal received through the WAVE-V2X antenna and the LTE-V2X signal received through the LTE-V2X antenna, and the controller may compare the WAVE-V2X communication information obtained by processing the WAVE-V2X signal and the LTE-V2X communication information obtained by processing the LTE-V2X signal to check whether data overlaps, and control the WAVE-V2X communication module and the LTE-V2X communication module to delete overlapping data and to transmit only non-overlapping data.

According to another embodiment of the present disclosure, in response to the WAVE-V2X communication information obtained by processing the WAVE-V2X signal and the LTE-V2X communication information obtained by processing the LTE-V2X signal being information received from a same vehicle on board unit or roadside unit, the controller may control the WAVE-V2X communication module and the LTE-V2X communication module to mutually verify the WAVE-V2X communication information and the LTE-V2X communication information and to complement accuracy of information.

According to another embodiment of the present disclosure, there may be two WAVE-V2X antennas, and the WAVE-V2X communication module may process the WAVE-V2X signals received through the two antennas.

According to another embodiment of the present disclosure, the vehicle on board unit may further include an HSM module that performs Elliptic Curve Digital Signature Algorithm (ECDSA) on secured messages being transceived through the WAVE-V2X signal and/or the LTE-V2X signal, thereby providing smooth and delayless communication even in vehicle-congested areas where numerous messages are transceived simultaneously.