Patent ID: 8704641

Claim:
A method of wireless communication between a radio frequency (RF) card reader and a mobile terminal, wherein the mobile terminal comprises an RF card and a tag, and the RF card reader comprises a tag reader to read data information from the tag, an RF reader module, and a main processor module, the method comprising: determining, by the main processor module using the tag reader, that the mobile terminal is within a communication range with the RF card reader by reading and receiving the data information from the tag of the mobile terminal; establishing, by the RF card reader, a communication link with the mobile terminal based on the data information received from the tag of the mobile terminal; controlling, by the main processor module, the RF reader module to exchange RF data with the RF card of the mobile terminal; detecting, intermittently during the RF data exchange between the RF reader module and the RF card, by the main processor module using the tag reader, whether the mobile terminal is still within the communication range with the RF card reader by reading the data information from the tag of the mobile terminal; and disconnecting, by the RF card reader, the communication link with the mobile terminal when the mobile terminal is not within the communication range with the RF card reader or when the RF data exchange has completed.