Abstract:
A head unit (100) that is a vehicle communication apparatus connected to a bus in an in-vehicle network system, the in-vehicle network system including a plurality of apparatuses that perform communication of frames via the bus, includes a multimedia control unit (150) that identifies a transmit frame, the transmit frame being a frame to be delivered to the bus, and a system control unit (110) capable of exchanging information on frames with the multimedia control unit (150) via wired communication or wireless communication. At least one of the multimedia control unit (150) and the system control unit (110) determines a conformity of the transmit frame with a rule.