METHOD AND APPARATUS FOR MANAGING TIME IN A SATELLITE POSITIONING SYSTEM
First Claim
1. A method, comprising:
- receiving, at a server, a time relation between an air-interface time of a base station and a satellite time for a satellite constellation from a first satellite positioning system (SPS) receiver; and
storing said time relation in said server.
4 Assignments
0 Petitions
Accused Products
Abstract
Method and apparatus for time management in a position location system is described. In one example, a time relation is received at a server. The time relation includes a relationship between an air-interface time of a base station and a satellite time for a satellite constellation from a first satellite positioning system (SPS) receiver. The time relation is then stored in the server. In another example, satellite time is determined at a first time for a satellite constellation at an SPS receiver. A time offset is determined between the satellite time and an air-interface time of a base station. The time offset is stored within the SPS receiver. A position of the SPS receiver is computed at a second time using satellite measurements and the stored time offset.
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Citations
30 Claims
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1. A method, comprising:
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receiving, at a server, a time relation between an air-interface time of a base station and a satellite time for a satellite constellation from a first satellite positioning system (SPS) receiver; and storing said time relation in said server. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method, comprising:
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determining satellite time for a satellite constellation using a first satellite positioning system (SPS) receiver; producing a time relation between said satellite time and an air-interface time of a base station; sending said time relation from said first SPS receiver to a server. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method, comprising:
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determining, at a first time, a satellite time for a satellite constellation at a satellite positioning system (SPS) receiver; determining a time offset between said satellite time and an air-interface time of a base station; storing said time offset; computing, at a second time, a position of said SPS receiver using satellite measurements and said stored time offset. - View Dependent Claims (24, 25, 26, 27)
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28. A method, comprising:
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determining, at a first time, a satellite time for a satellite constellation at a satellite positioning system (SPS) receiver; determining a time offset between said satellite time and an air-interface time of a base station; storing said time offset; synchronizing, at a second time, clock circuitry in said SPS receiver to said satellite time using said time offset in response to a handover from said base station to another base station; and determining another time offset between said satellite time and another air-interface time of said other base station using said synchronized clock circuitry.
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29. A position location server, comprising:
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an interface for receiving a time relation between an air-interface time of a base station and a satellite time for a satellite constellation from a first satellite positioning system (SPS) receiver; and a storage device for storing said time relation.
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30. A position location system, comprising:
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a base station having an air-interface time associated therewith; a first satellite positioning system (SPS) receiver for determining satellite time for a satellite constellation and producing a time relation between said satellite time and said air-interface time; and a server for receiving said time relation from said first SPS receiver.
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Specification