Wireless tag reader, wireless tag system, computer readable medium and wireless communication method
US7450009B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2006 |
| Grant date | Nov 11, 2008 |
| Priority date | — |
| Expiry date | Dec 22, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10019
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
There is provided with a wireless tag reader communicating with a plurality of wireless tags each of which retains tag information piece and a bloom filter, the wireless tag reader comprising: a transmitter configured to transmit a read request signal simultaneously to the wireless tags to request the wireless tags to read out the bloom filters; a receiver configured to receive bloom filter signals simultaneously from the wireless tags to acquire a colliding bloom filter signal; a decoder configured to decode the colliding bloom filter signal to acquire a composite bloom filter which is equivalent to logic operation OR on the bloom filters; a data storage configured to store tag information pieces; and a filter verifier configured to verify each of tag information pieces in the data storage with the composite bloom filter to detect tag information pieces for which a verification result is positive or negative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.