Communication methods, systems, apparatus, and devices involving RF tag registration
US7362212B2 · kind B2 · utility
13Cited by
53References
44Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2004 |
| Grant date | Apr 22, 2008 |
| Priority date | — |
| Expiry date | Sep 23, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10029
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
One technique of the present invention includes a number of Radio Frequency (RF) tags that each have a different identifier. Information is broadcast to the tags from an RF tag interrogator. This information corresponds to a maximum quantity of tag response time slots that are available. This maximum quantity may be less than the total number of tags. The tags each select one of the time slots as a function of the information and a random number provided by each respective tag. The different identifiers are transmitted to the interrogator from at least a subset of the RF tags.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.