| 摘要 |
An ID-code is sent from a central computer (1) to a mobile terminal (3) via a radio link and then sent by the terminal to the device (2, 11) via a short-range radio link (5, 13). The device or a transmitter unit in the latter sends the ID-code to the central computer, which compares the received code with that sent to the mobile terminal. The mobile terminal is a mobile phone. The short-range radio link is an RFID or Bluetooth link. |
