MOBILE CELLULAR IDENTIFICATION DATABASE FOR ENHANCED GPS PERFORMANCE
First Claim
1. A method for determining position of a mobile station, comprising:
- storing a database of cellular identifications and associated position information in mobile station memory; and
assisting in mobile station position determination with the database.
1 Assignment
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Accused Products
Abstract
A mobile station database of cellular identifications and associated position information is stored in mobile station memory. The mobile station uses the position information in the database to assist in determining a current position for the mobile based on an identifier, such as cell ID, base station BSIC, PSC, or carrier frequency. A satellite vehicle signal is searched in an uncertainty region that is a function of position information associated with the current identifier. The uncertainty region can be limited by assumed platform dynamics via predefined velocity and acceleration information. Time maintenance for the mobile station can also be achieved through known approximate position from the position database and measurement of a single satellite vehicle propagation delay. The mobile station can compare a position determination obtained through satellite vehicle signals with position database information to determine the validity of that position. Out-of-network position information is also stored in the position database and is optionally shared with a network.
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Citations
28 Claims
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1. A method for determining position of a mobile station, comprising:
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storing a database of cellular identifications and associated position information in mobile station memory; and assisting in mobile station position determination with the database. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of determining mobile station position, comprising:
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receiving at least one identifier selected from the group consisting of cell ID, BSIC identifier, PSC identifier, and base station carrier frequency, from a base station; searching a position database stored in the mobile station for the identifier, wherein the position database includes at least one identifier and position information associated with the identifier; searching for a satellite vehicle signal based upon position information from the position database; and determining precise mobile station position based upon satellite vehicle signal acquisition. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A mobile station apparatus comprising:
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a two-way communication system; a position location system; mobile station control; and memory comprising a position database comprising at least one identifier selected from the group consisting of cell ID, BSIC identifier, PSC identifier, and base station carrier frequency, and position information associated with the identifier. - View Dependent Claims (26, 27, 28)
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Specification