| 摘要 |
<P>PROBLEM TO BE SOLVED: To simplify slot setting work at initial setting when performing communication with a wireless tag by a time-division multiple access using a common wireless communication band between respective sensors, in a wireless authentication system where a plurality of the sensors are arranged along moving space of a detection object so as to partially overlap the detection object areas between the adjacent sensors to detect movement of the detection object by communication between the wireless tag carried by the detection object and any one of the sensors. <P>SOLUTION: Sensors from an upstream side sensor S1 to a downstream side sensor S4 have sequentially received notifications of slots occupied by the sensors themselves and slots occupied by the receiving adjacent sensors. Of slots, the slot with high priority is selected as a slot for itself from open slots not occupied by directly adjacent sensors, like SL1. Accordingly, the number of slots in use can be restrained to the minimum and a detection period can be shortened, thus achieving high response. <P>COPYRIGHT: (C)2012,JPO&INPIT |
