Bi-slot tree based tag identification method in RFID systems
US7626503B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2006 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Sep 6, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10049
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A bi-slot tree based tag identification method in RFID systems includes (a) transmitting an inquiry of (n−1) bits to each tag at the reader; (b) deciding whether the inquiry of (n−1) bits are identical with first (n−1) bits of each tag ID when receiving the inquiry of (n−1) bits at each tag within a readable range of the reader; (c) transmitting each tag ID by one bit from (n+1)th bit to last bit thereof to the reader through different time slots based on nth bit value of each tag ID at the tags whose first (n−1) bits are identical with the inquiry of (n−1) bits; and (d) at the reader, checking whether there is a collision among the tag IDs received from the tags and identifying each tag ID of the tags based on the check result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.