TDOA/GPS hybrid wireless location system
First Claim
1. A method for the determination of the location of a mobile station (MS) equipped with embedded GPS signal reception capability and equipped to operate within a wireless communications network, the method comprising:
- (a) receiving GPS data at a land station, said GPS data being received from a MS to be located;
(b) at a land station equipped with location-measurement facilities, receiving a communications-band signal from said MS to be located and using the location-measurement facilities to extract location-related characteristic data from the communications-band signal; and
(c) at a land station equipped for location-determination calculations, performing location-determination calculations using the GPS data and the extracted location-related characteristic data to derive an estimated location for the MS.
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Accused Products
Abstract
A method and system for enhancing the accuracy and robustness of locations determined for a mobile wireless transceiver in a cellular telephone communications system integrates location-related information both from an assisted GPS device embedded in the mobile unit and from infrastructure-based facilities that extract signal characteristic data at networked base stations. Available supporting collateral information may be additionally evaluated in the location determinations to provide location estimates of enhanced robustness and accuracy.
158 Citations
20 Claims
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1. A method for the determination of the location of a mobile station (MS) equipped with embedded GPS signal reception capability and equipped to operate within a wireless communications network, the method comprising:
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(a) receiving GPS data at a land station, said GPS data being received from a MS to be located;
(b) at a land station equipped with location-measurement facilities, receiving a communications-band signal from said MS to be located and using the location-measurement facilities to extract location-related characteristic data from the communications-band signal; and
(c) at a land station equipped for location-determination calculations, performing location-determination calculations using the GPS data and the extracted location-related characteristic data to derive an estimated location for the MS. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for the determination of the location of a mobile station (MS) equipped with embedded GPS signal reception capability and equipped to operate within a wireless communications network, comprising:
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(a) means for receiving GPS data for use in location-determination calculations, said GPS data being received from a MS to be located;
(b) a land station equipped with location-measurement facilities and a receiver for receiving from said MS to be located a wireless communications-band signal and using the location-measurement facilities to extract location-related characteristic data from the communications-band signal; and
(c) a land station equipped for location-determination calculations, including a processor for performing location-determination calculations using the GPS data and the extracted location-related characteristic data to derive an estimated location for the MS. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification