Detecting a blocker RFID tag
US7847696B2 · kind B2 · utility
1Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2008 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Dec 23, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/07336
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
For detecting a blocker RFID tag, the following steps are conducted. First, a random identifier of a given bit length is created. Alternatively, an identifier is selected out of a probing set, which is stored on a data storage device. The probing set comprises of identifiers, which are not being used as identifiers for a given set of RFID tags. In a second step, a response from all RFID tags is requested having an identifier matching the random identifier or, respectively, the selected identifier. In a third step, it is determined, depending on receiving or not receiving a response, whether the blocker RFID tag is present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.