PARKING GARAGE ENVIRONMENT DETECTION AND EHPE DETERMINATION FOR VEHICULAR NAVIGATION
First Claim
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1. A method, implemented at a telematics unit of a vehicle, for calculating the estimated horizontal position error (EHPE) of a position of a vehicle provided by a dead reckoning (DR) engine, the method comprising:
- determining that the vehicle is operating within a parking garage, wherein determining that the vehicle is operating within a parking garage triggers the use of a parking garage mode by a DR engine of the telematics unit; and
determining the EHPE of the vehicle according to the parking garage mode of the DR engine.
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Abstract
Implementations of the present invention contemplate obtaining a more accurate estimated horizontal position error (EHPE) under conditions in which the telematics unit of a vehicle cannot receive GNSS signals. In particular, the invention contemplates determining that a vehicle is entering a parking garage and obtaining a more accurate estimated horizontal position error (EHPE) of the vehicle in the parking garage when GNSS signals are unavailable.
15 Citations
20 Claims
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1. A method, implemented at a telematics unit of a vehicle, for calculating the estimated horizontal position error (EHPE) of a position of a vehicle provided by a dead reckoning (DR) engine, the method comprising:
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determining that the vehicle is operating within a parking garage, wherein determining that the vehicle is operating within a parking garage triggers the use of a parking garage mode by a DR engine of the telematics unit; and determining the EHPE of the vehicle according to the parking garage mode of the DR engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A computer readable medium having stored thereon a set of computer executable instructions for calculating the estimated horizontal position error (EHPE) of a position of a vehicle provided by a dead reckoning (DR) engine, the set of instructions comprising instructions for:
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determining that the vehicle is operating within a parking garage, wherein determining that the vehicle is operating within a parking garage triggers the use of a parking garage mode by a DR engine of the telematics unit; and determining the EHPE of the vehicle according to the parking garage mode of the DR engine. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A telematics unit configured to receive GNSS signals and to determine the position of a vehicle through dead reckoning (DR) techniques when it is unable to receive GNSS signals, the telematics unit comprising:
a processor configured to determine that the vehicle is operating within a parking garage and further configured to execute a parking garage DR mode upon determining that the vehicle is operating within the parking garage wherein the parking garage DR mode determines an estimated horizontal position error (EHPE) of the position of the vehicle. - View Dependent Claims (19, 20)
Specification