GPS-assisted mobile phone clock for use in non-digital service coverage areas
First Claim
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1. A method of setting an internal clock in a GPS-equipped mobile communication device when the mobile communication device is not in a digital service area, comprising:
- powering-up the mobile communication device;
determining whether digital service is available, and, if digital service is not available, activating a GPS receiver in the mobile communication device;
detecting a GPS time signal from any GPS satellite, andsetting the internal clock in the mobile communication device from the GPS time signal.
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Abstract
A method of setting an internal clock in a GPS-equipped mobile communication device when the mobile communication device is not in a digital service area includes determining whether digital service is available, including determining whether digital service is available by determining the elapsed time from the last receipt of a digital service contact, and, if digital service is not available, detecting a GPS time signal from a single GPS satellite.
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Citations
13 Claims
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1. A method of setting an internal clock in a GPS-equipped mobile communication device when the mobile communication device is not in a digital service area, comprising:
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powering-up the mobile communication device; determining whether digital service is available, and, if digital service is not available, activating a GPS receiver in the mobile communication device; detecting a GPS time signal from any GPS satellite, and setting the internal clock in the mobile communication device from the GPS time signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of setting an internal clock in a GPS-equipped mobile communication device when the mobile communication device is not in a digital service area, comprising:
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determining whether digital service is available, including determining whether digital service is available by determining the elapsed time from the last receipt of a digital service contact, and, if digital service is not available, activating a GPS receiver in the mobile communication device; detecting a GPS time signal from any GPS satellite, and setting the internal clock in the mobile communication device from the GPS time signal. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification