Passive GSM-based self-locating device
US7363043B2 · kind B2 · utility
8Cited by
12References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 2002 |
| Grant date | Apr 22, 2008 |
| Priority date | — |
| Expiry date | May 16, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A self locating device that uses GSM signals associated with GSM digital telephone base stations to determine its current location. The device uses GSM common channel signals to determine observed time differences between a local base station and at least two additional base stations. It also uses the common channel signals to identify these base stations and to match the identifications to geographical locations. It further uses a geolocation algorithm to determine the location of the device relative to the base stations, and uses the geographic location data to determine the current geographic location of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.