Wireless identification systems and protocols
US7030731B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2002 |
| Grant date | Apr 18, 2006 |
| Priority date | — |
| Expiry date | Mar 9, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10297
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Monitoring systems and protocols are disclosed that are flexible in mode operation and format depending on the environment in which they are used. Such monitoring systems and protocols are able to change their utilization automatically, or by received instruction to do so. A location detection system includes one or more low frequency transmitters, one or more radio frequency monitoring tags and one or more receiving devices. The low frequency transmitter transmits location identification information, such as the transmitter ID, to a tag in the vicinity of the transmission. The tag relays the transmitter ID using a higher frequency transmission sent from the tag to the receiver. Communication protocols are disclosed that enable deciphering of multiple tag transmissions starting simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.