A method and system for carrying out communication adequately in a HetNet even when the radio resource region for downlink control channels is expanded is disclosed. In a parking brake device in which a pull-up force of a parking lever supported by a base plate fixed on a vehicular body side is transmitted to a brake device of a vehicle via a wire to lock the brake device, an ignition block is provided on the parking lever. The data controller authorizes a data recipient to obtain that data subject data when authorized by a data subject.