Culled satellite ephemeris information for quick assisted GPS location determination
US6650288B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2002 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Sep 11, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
GPS satellites are culled into a minimum, preferred group having a longest dwell time within a cone of space, and communicated to mobile devices or subscribers within a particular region (e.g., serviced by a particular base station). The culling may initially be a list of GPS satellites visible to a particular base station at a particular time. As a preferred culling, only those GPS satellites currently within a cone of space above the relevant base station are selected for communication by a mobile device within the service area of the relevant base station. As an ultimate culling, a minimum set of GPS satellites may be selected based on, e.g., being not only within an arbitrary cone of space normal to the base station, but also projected to remain within that cone of space for the longest period of time, i.e., having the longest dwell time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.