| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To manage a plurality of RF tag readers/writers provided close to each other, and to secure redundancy of the RF tag readers/writers while avoiding interference. <P>SOLUTION: A reader/writer changeover part is instructed to use a first reader/writer control part. The first reader/writer part is inquired to confirm whether a first RF tag reader/writer fails or not, and the reader/writer changeover part is instructed to use a second reader/writer control part when the failure is confirmed. The first reader/writer control part is inquired so as to monitor recovery from the failure, and it is returned to processing for instructing the reader/writer changeover part to use the first reader/writer part when the recovery from the failure of the first RF tag reader/writer is confirmed. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
