Wireless tag system, wireless tag access control device, wireless tag access control method, wireless tag access control program and wireless tag
US7212121B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 14, 2004 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | Jul 6, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A wireless tag system which does not require any anti-collision process or, if an anti-collision process is required, can reduce the number of tags that need to participate in the anti-collision process to make the anti-collision process proceeds fast. The wireless tag system comprises a plurality of wireless slave tags which have respective unique IDs, a plurality of wireless master tags arranged for the slave tags and storing the unique IDs of the slave tags and a wireless tag access control device which accesses the master tags to acquire the unique IDs of the slave tags from the master tags and subsequently accessing the slave tags by using the acquired unique IDs of the slave tags.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.