PARKING GARAGE ENVIRONMENT DETECTION AND EHPE DETERMINATION FOR VEHICULAR NAVIGATION

摘要

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.

主权项

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.