Location determination for mobile units
US6819286B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2003 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Feb 28, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/0289
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for location determination using Bluetooth techniques is applicable within buildings, underground or within other structures. A mobile unit (10) seeks the location of a cell from location master (20). Location master (20) and a number of location subsidiaries (21-24) determine ranging information with regard to the mobile unit (10) using Bluetooth techniques. The location master (20) then determines the mobile unit location using least squares estimation or other triangulation methods (50). In an alternate embodiment, ranging information is fine tuned for noise and error measurements between the location master and the location subsidiaries (51, 53) are used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.