Method and system for aiding GPS receivers via a cellular or PCS network
First Claim
1. The method of assisting a global positioning system (GPS) receiver to make positioning measurements, the GPS receiver being integrated in a mobile station including a transceiver operating in a wireless network, comprising the steps of:
- transferring assistance information from the wireless network to the mobile station, the assistance information representing range of a fixed location in the wireless network in proximity to the mobile station at a select time, and derivatives of the range, relative to plural select satellites in the GPS; and
operating the mobile station to utilize received assistance information to search composite received signals from the plural select satellites in the GPS to measure a code phase for plural ones of the select satellites in the GPS, the measured code phases representing range of the mobile station relative to the plural ones of the select satellites.
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Accused Products
Abstract
In accordance with the invention, there is disclosed a system for determining location of a mobile station. The mobile station includes a transceiver operating in a wireless network and a GPS receiver. The system includes a wireless network control system including GPS receivers for obtaining ephemeris data. The control system develops assistance information from the ephemeris data and transmits the assistance information to the mobile station via the wireless network. The assistance information represents range at a fixed location in the wireless network in proximity to the mobile station at a select time, and derivatives of the range, relative to plural select satellites in the GPS. The mobile station utilizes received assistance information for searching the composite received signals from the plural select satellites in the GPS to measure a code phase for plural ones of the select satellites in the GPS and returning the measured code phases to the wireless network control system via the wireless network. The wireless network control system computes location of the mobile station in the wireless network utilizing a fixed location and the measured code phases.
254 Citations
39 Claims
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1. The method of assisting a global positioning system (GPS) receiver to make positioning measurements, the GPS receiver being integrated in a mobile station including a transceiver operating in a wireless network, comprising the steps of:
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transferring assistance information from the wireless network to the mobile station, the assistance information representing range of a fixed location in the wireless network in proximity to the mobile station at a select time, and derivatives of the range, relative to plural select satellites in the GPS; and
operating the mobile station to utilize received assistance information to search composite received signals from the plural select satellites in the GPS to measure a code phase for plural ones of the select satellites in the GPS, the measured code phases representing range of the mobile station relative to the plural ones of the select satellites. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. The method of determining location of a mobile station including a transceiver operating in a wireless network and a global positioning system (GPS) receiver, comprising the steps of:
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transferring assistance information from the wireless network to the mobile station, the assistance information representing range of a fixed location in the wireless network in proximity to the mobile station at a select time, and derivatives of the range, relative to plural select satellites in the GPS;
operating the mobile station to utilize received assistance information to search composite received signals from the plural select satellites in the GPS to measure a code phase for plural ones of the select satellites in the GPS and returning the measured code phases to the wireless network; and
computing location of the mobile station in the wireless network utilizing the fixed location and the measured code phases. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A system for determining location of a mobile station, the mobile station including a transceiver operating in a wireless network and a global positioning system (GPS) receiver, comprising:
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a wireless network control system including GPS receivers for obtaining ephemeris data, the control system developing assistance information from the ephemeris data and transmitting the assistance information to the mobile station via the wireless network, the assistance information representing range of a fixed location in the wireless network in proximity to the mobile station at a select time, and derivatives of the range, relative to plural select satellites in the GPS;
the mobile station including means utilizing received assistance information for searching composite received signals from the plural select satellites in the GPS to measure a code phase for plural ones of the select satellites in the GPS and returning the measured code phases to the wireless network control system via the wireless network; and
the wireless network control system including means for computing location of the mobile station in the wireless network utilizing the fixed location and the measured code phases. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification