| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an information reader/writer for efficiently using available frequency band assigned for wireless tag usage by avoiding interference of electromagnetic waves outputted by a plurality of the information readers/writers which use network communication means. <P>SOLUTION: A plurality of information readers/writers mutually exchange frequency hopping patterns and output timing patterns to avoid interference of electromagnetic waves outputted by themselves. Herewith, a problem that readability of the wireless tags is undermined due to ambient noises and interference of the electromagnetic waves mutually outputted by the information readers/writers when constituting a system with a plurality of the wireless tag/information readers/writers. <P>COPYRIGHT: (C)2007,JPO&INPIT |
