Patent ID: 7543746

Claim:
A portable terminal system comprising: a portable terminal including a first RFID section and a battery; a portable terminal mounting base including a second RFID section and a communication control section and having a casing which mounts said portable terminal, wherein said first RFID section performs RF communication with both an external RFID tag and said portable terminal mounting base, and operates under an operating power supplied from said battery, said second RFID section performs RF communication with said first RFID section, and said communication control section performs data communication with an external apparatus, said portable terminal mounting base transmits first data from said communication control section to said external apparatus, after said first RFID section of said portable terminal transmits, by RF communication, the first data to said second RFID section, said portable terminal mounting base transmits, by RF communication, second data from said second RFID section to said first RFID section of said portable terminal after said external apparatus transmits the second data to said communication control section, said first RFID section operates as a RFID master station performing RF communication with said external RFID tag, and also operates as a RFID slave station storing identification information identifying said portable terminal, and said second RFID section operates as a RFID master station performing RF communication with said first RFID section after the identity of the portable terminal is verified using identification information contained in the RF communication with said first RFID section, said first RFID section operating as the RFID slave station.