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Method and decreasing position error during turn-by-turn sessions
US9109910B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9109910-B2 |
| Application number | US-201113172347-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 29, 2011 |
| Priority date | Jun 29, 2011 |
| Publication date | Aug 18, 2015 |
| Grant date | Aug 18, 2015 |
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Abstract
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The described method and system provide for GPS navigation utilizing an EHPE (estimated horizontal positioning error) timer for reducing route calculation failures. By utilizing an EHPE timer, a GPS unit may continue to check for GPS signal until the EHPE timer expires before reporting route calculation failure to the user. Thus, in situations where GPS signal is only temporarily lost and current location information is only temporarily degraded, user route requests will not necessarily result in route calculation failure. In preferred implementations, the system and method are implemented within the context of a telematics unit in a vehicle or in the context of a call center.
First claim
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The invention claimed is: 1. A method for satellite-based navigation, comprising: receiving, by a device, satellite-based positioning information corresponding to a location of a vehicle; determining, by the device, that satellite-based positioning signal reception is impaired, using the received location of the vehicle as the vehicle's last known position, and determining a current location of the vehicle based on the vehicle's last known position and dead reckoning navigation…
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- What does patent US9109910B2 cover?
- The described method and system provide for GPS navigation utilizing an EHPE (estimated horizontal positioning error) timer for reducing route calculation failures. By utilizing an EHPE timer, a GPS unit may continue to check for GPS signal until the EHPE timer expires before reporting route calculation failure to the user. Thus, in situations where GPS signal is only temporarily lost and curre…
- Who is the assignee on this patent?
- Doherty James, Veliu Shpetim S, Gen Motors Llc
- What technology area does this patent fall under?
- Primary CPC classification G01C21/34. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Aug 18 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).