Method, apparatus and system for GPS time synchronization using cellular signal bursts
First Claim
1. A method, comprising:
- responding to a cellular communication signal by providing a trigger pulse derived from the cellular communication signal;
providing the trigger pulse to a hardware path;
accessing a signal indicating local time;
responding to the trigger pulse provided via the hardware path and responding to the signal indicating local time, by providing a local time value for receipt of the trigger pulse.
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Accused Products
Abstract
A system, apparatus and corresponding method by which to synchronize to a time reference a main module of a device—a main module such as global positioning system (GPS) receiver—using a cellular communication signal received by a cellular module also included in the device. To synchronize the main module to the reference time, the invention provides a method including the steps of: having the cellular module respond to the cellular communication signal by providing to a clock module of the main module a trigger pulse derived from the data component of the cellular communication signal, and also by providing to the main module information relating the trigger pulse to a universal time. The main module is then able to resolve a value for time based on the information relating the trigger pulse to a universal time and the trigger pulse.
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Citations
8 Claims
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1. A method, comprising:
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responding to a cellular communication signal by providing a trigger pulse derived from the cellular communication signal;
providing the trigger pulse to a hardware path;
accessing a signal indicating local time;
responding to the trigger pulse provided via the hardware path and responding to the signal indicating local time, by providing a local time value for receipt of the trigger pulse. - View Dependent Claims (2)
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3. An apparatus, comprising:
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means, responsive to a cellular communication signal, for providing a trigger pulse derived from the cellular communication signal;
means for communicating the trigger pulse to a trigger register; and
means, responsive to the trigger pulse and to a signal indicating local time, for providing a local time indicative of when the trigger pulse is received. - View Dependent Claims (4)
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5. An apparatus, comprising:
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a cellular module, responsive to a cellular communication signal, for providing a trigger pulse derived from the cellular communication signal;
a hardware path, for communicating the trigger pulse to a trigger register; and
the trigger register, responsive to the trigger pulse and to a signal indicating local time, for providing a local time indicative of when the trigger pulse is received. - View Dependent Claims (6, 7, 8)
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Specification