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AssigneeMotorola, Inc.
InventorsGeorge Jeffrey Geier, Chu Gen Wang
Estimating the term…
The present invention provides an assessment, in real-time, of the integrity of the positioning solution and navigation sensors used to support an Emergency Calling System (ECS) that integrates positioning and cellular phone technology. This integrity information is used, via a warning light displayed to the driver, to indicate when the system will not support Emergency Calling to the accuracies required. The present invention discusses that at least two types of warnings may be generated and provided to the user. The first being an indication that the positioning accuracy will no longer support Emergency Calling. The second being an indication that a sensor or subsystem of the Emergency Call positioning system is malfunctioning and should be serviced as soon as possible whereby such a malfunction may lead to eventual failure of the system.
A method for determining a loss of accuracy of a positioning system within an Emergency Call System (ECS) installed in a movable vehicle, said method comprising the steps of:
A method for determining the failure of a subsystem of a positioning system within an Emergency Call System (ECS) installed in a movable vehicle, said positioning system including a global positioning satellite (GPS) subsystem integrated with a dead reckoning (DR) subsystem, said method comprising the steps of:
An Emergency Call System (ECS) for installation on a movable vehicle, comprising:
Dependencies are inferred from the claim text.