Personnel locating system
US6339709B1 · kind B1 · utility
36Cited by
18References
46Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1999 |
| Grant date | Jan 15, 2002 |
| Priority date | — |
| Expiry date | Nov 29, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S1/685
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is described a system and method for locating, and optionally monitoring the status of, a mobile entity in a given area fitted with a radio beacon. In one embodiment, the system features a network of bi-directional radio beacons which transmit on the same frequency at random intervals. A method for processing and relaying unique message identifiers throughout the system is disclosed which allows the vicinity of the mobile entity to be determined from any beacon in the network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.