| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the problem that an internal battery is needed for an apparatus including a function for preventing loss of radio terminal and there is the possibility that the battery of the apparatus has run out when a radio terminal is actually lost. <P>SOLUTION: When achieving the function for preventing loss of radio terminal, a product loaded with a passive tag is used. By using the passive tag, the need of an internal battery is eliminated. An IC card such as a commutation ticket or an employee ID card carried by a user at all times is registered in the radio terminal, a message is transmitted and received periodically between the radio terminal and the IC card, and the radio terminal includes a function of raising an alarm depending on the communication result. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
