Method and system for mobile station location
First Claim
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1. A method of locating a mobile communication device comprising:
- receiving at a first receiver unit at least a first instance of a wireless communication signal from a mobile communication device;
determining a first time parameter associated with the received first instance of the wireless communication signal based at least on a time of arrival at said first receiver unit of said first instance of the wireless communication signal;
determining based at least on said first time parameter using a geographic database a first set of one or more possible distances of the mobile communication device from the first receiver unit; and
presenting at least one likely location of said mobile communication device based on said first set of one or more possible distances of the mobile communication device from the first receiver unit.
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Abstract
A system and method for locating mobile stations in a wireless communication system such as a cellular system based on at least one received wireless signal and a database of geographical information.
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Citations
22 Claims
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1. A method of locating a mobile communication device comprising:
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receiving at a first receiver unit at least a first instance of a wireless communication signal from a mobile communication device; determining a first time parameter associated with the received first instance of the wireless communication signal based at least on a time of arrival at said first receiver unit of said first instance of the wireless communication signal; determining based at least on said first time parameter using a geographic database a first set of one or more possible distances of the mobile communication device from the first receiver unit; and presenting at least one likely location of said mobile communication device based on said first set of one or more possible distances of the mobile communication device from the first receiver unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system comprising:
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one or more receiver units to receive respective instances of at least one wireless communication signal transmitted by a mobile communication device; one or more location measurement units to determine time parameters associated with said instances of the wireless communication signal received at the respective receiver units based at least on respective times of arrival at the receiver units; a geographic database to store for each of said receiver units an association of values for said time parameters with a respective plurality of sets of possible distances from said receiver unit; and a location management unit to determine using said geographic database a set of possible locations of the mobile communication device based on said determined time parameters. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification