Method for identifying electronic labels by adaptive rounds
US6641036B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 2002 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Mar 18, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/0008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention concerns a method for identifying electronic labels affixed on products using a querying device, characterized in that it comprises the following steps which consist in: (a) indicating to the electronic labels the number Ns of consecutive emitting windows of a first cycle or round; (b) counting, during the first cycle of Ns windows, the messages received from the electronic labels to determine the number ni of identifications, the number nv of windows or blank spaces and the number nc of collisions; (c) stopping the process if nc=0; or proceeding to step (d) if nc≠0; (d) calculating a number Ns1 of emitting windows for the next cycle on the basis of the values of Ns, ni, nv and nc; going back to step (a) with Ns=computed Ns1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.