| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for selecting one or more transponders from a plurality of transponders by a base station, with which selection is made possible to improve reliability and reduce time and a chip area required for conversion in a transponder is reduced. <P>SOLUTION: In the method, a random number is generated in a given transponder with the aid of a random number generator, the relevant random number generators is switched into a counter operating mode after the reception of a selection command transmitted by the base station, while a count state of the random number generator is decremented or incremented when the base station transmits the start of a time slot during the counter operating state, the relevant transponder transmits a transponder-specific identification to the base station if the count state of its random number generator is equal to a predetermined value, and the relevant random number generator is then switched back to the operating mode for random number generation. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
