| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress power consumption of a tag of an emergency energizing household electric appliance side, and to more quickly receive recall information. <P>SOLUTION: This radio tag system includes a radio information transmitter, a radio repeater and a radio tag device, determines a downtime and the number of times of carrier sense from an operating time of the radio tag device, and can receive recall information from the radio information transmitter more quickly while suppressing power consumption by performing only carrier sense while the radio tag device is inactive. <P>COPYRIGHT: (C)2009,JPO&INPIT |
