A deflectable in-line swivel that permits axial deflection of a tubular string is presented. The image forming apparatus receives information about the article stored in the RFID tag, requests, from a server, one or more detailed information items about the article that correspond to the received information, and receives the requested one or more detailed information items. The mobile station reproduces the second control information by using the first control information and the first difference information. The method also includes confirming that the received signal is a valid signal when the amplitude of the signal is at least one of greater than or equal to the amplitude threshold over a predefined period of time. The method includes at least initially directing one or more messages sent to and from each device to the master controller, sending a first type of control message from the master controller to respective devices, and sending a second type of control message and a third type of control message from the master controller to respective devices.