US 12,405,385 B1 · Global positioning system time verification for autonomous vehicles

Abstract

A method of updating a clock associated with an autonomous vehicle includes determining, at a processor, a sensor-based position of the autonomous vehicle, which is determined based on data from one or more sensors and based on a digital map. The method also includes determining, at the processor, a global positioning system (GPS) computed position of the autonomous vehicle and a GPS time. The GPS computed position and the GPS time are determined based on a plurality of GPS signals received from GPS satellites. The method further includes comparing the sensor-based position to the GPS computed position to determine whether the sensor-based position is within a threshold distance from the GPS computed position. The method also includes updating the clock associated with the autonomous vehicle based on the GPS time in response to a determination that the sensor-based position is within the threshold distance from the GPS computed position.

Claims20

Dependent claims

A system comprising:

a global positioning system (GPS) receiver associated with a vehicle;
one or more sensors associated with the vehicle;
a clock associated with the vehicle;
and
circuitry coupled to the GPS receiver, the one or more sensors, and the clock, wherein the circuitry is configured to:
verify whether a GPS time is accurate using a sensor-based position of the vehicle, wherein the GPS time is based on data from the GPS receiver and the sensor-based position of the vehicle is based on data from the one or more sensors, wherein the circuitry is configured to verify whether the GPS time is accurate by:
comparing the sensor-based position of the vehicle to a GPS-based position of the vehicle, wherein the GPS-based position of the vehicle is based on the data from the GPS receiver;
and
verifying that the GPS time is accurate if the sensor-based position of the vehicle is within a threshold distance from the GPS-based position of the vehicle;
and
responsive to verifying that the GPS time is accurate, update the clock based on the GPS time.

8 more elements

Dependencies are inferred from the claim text.

Global positioning system time verification for autonomous vehicles

Life of this patent

Global positioning system time verification for autonomous vehicles

Life of this patent

Abstract

Claims20