Mobile terminals and methods for regulating power-on/off of a GPS positioning circuit
US8467804B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Oct 16, 2007 |
| Grant date | Jun 18, 2013 |
| Priority date | — |
| Expiry date | Aug 9, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining location of a mobile terminal includes repetitively switching power-on and power-off to a GPS receiver circuit which determines location of the mobile terminal using GPS signals. The power-on to power-off duty cycle of the GPS receiver circuit is regulated in response to distance that the mobile terminal has moved from a previously determined location. The power-on to power-off duty cycle can be regulated in response to identifying GPS isolation, in response to an acceleration-determined distance from previous GPS-determine location, an acceleration-determined velocity of the mobile terminal, availability of position assistance information from a cellular system, presence/absence of signals from a WLAN/Bluetooth device, and/or detection of a new cellular base station ID.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.