Tag identification system, tag reading apparatus, and method for determining sequence of tags
US7924162B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2008 |
| Grant date | Apr 12, 2011 |
| Priority date | — |
| Expiry date | Oct 5, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/0808
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a tag identification system, a tag reading apparatus, and a method for determining sequence of tags. According to an aspect of the invention, a tag identification system comprises a tag reading apparatus and a plurality of tags, wherein: the tag reading apparatus has at least two antennas, wherein the apparatus transmits an interrogation signal within the coverage of each of the antennas; the plurality of tags sequentially pass by the coverage of each of the at least two antennas, each of the plurality of tags returning a reply to the at least two antennas in response to a received interrogation signal; and the tag reading apparatus includes a sequence determination unit which determines the sequence in which the plurality of tags pass by based on replies returned from the plurality of tags and received by the at least two antennas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.