| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a roll call system at low cost by which roll call is accurately and surely performed. <P>SOLUTION: A master unit 10 operated by a roll caller transmits a routing construction instruction for instructing to constitute routing of an ad hoc network among a plurality of slave units carried by roll called persons to each slave unit 20 by radio. The slave unit 20 starts constitution processing of the routing according to reception of the routing construction instruction and transmits a completion report of the routing to which a self-identifier is added to the master unit 10 by radio. The master unit 10 receives the completion report of the routing and confirms presence/absence of existence of the slave unit 20. Furthermore, the slave unit 20 executes an RSSI test, transmits its result to the master unit 10 by radio and raises precision of the roll call by receiving an RSSI test result by the master unit 10. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
