| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that conventional techniques cannot cope with situations that data reference is impossible due to changes of an ambient communication environment and changes of directivity because a range of device level errors which they can discover is narrow and the problem that manual rule generation, registration, and change are difficult because of the occurrence of setting mistakes or registration omissions though it is necessary to preliminarily define rules when noticing the rules to monitor a device level error. <P>SOLUTION: An inter-reader rule extraction function which automatically extracts rules existing among sets of IDs acquired by respective readers during correct operation of a system is provided to solve the problems. The function allows even the system using manu RFID readers to generate rules. It is defined as a change of work that the prescribed number of rules enter into an unestablished state, and the latest rules are used to monitor the system by an inter-reader rule reconstruction function which reconstructs rules when work is changed. <P>COPYRIGHT: (C)2008,JPO&INPIT |
