Patent · US Active

Method and decreasing position error during turn-by-turn sessions

US9109910B2 · kind B2 · utility

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6Claims
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Key dates

Filing dateJun 29, 2011
Grant dateAug 18, 2015
Priority date—
Expiry dateMay 9, 2033

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01S19/49
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.