Assisted global positioning system location determination
US7825855B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 2004 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Mar 1, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/05
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a method for selectively reducing the amount of assistance data transmitted to an assisted GPS equipped mobile terminal by excluding the transmission of assistance data relating to one or more satellites that are potentially visible to the mobile station. In the preferred embodiment one or more criteria are used to identify which of the potentially visible satellite are the least likely to be used by the mobile terminal in determining its position, and assistance data relating to the least likely satellites to be used is excluded from the assistance data that is to be transmitted to the mobile terminal. A determination of an optimal number of satellites for which assistance data should be sent to the mobile terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.