System and method for incremental broadcast of GPS navigation data in a cellular network
First Claim
1. A method of broadcasting Global Positioning System (GPS) assistance data in a wireless communication network to a mobile stations, each mobile station comprising a transceiver operating in the wireless communication network and an integrated GPS receiver to make GPS positioning measurements, the method comprising the steps of:
- establishing a direct point-to-point channel with a select mobile station;
transferring orbital modeling information on the point-to-point channel to the select mobile station for visible GPS satellites;
broadcasting GPS correction data on the wireless communication network to all mobile stations communicating in the wireless communication network; and
updating assistance data by broadcasting data representing updated orbital modeling information to all mobile stations communicating in the wireless communication network, said updating comprising parsing the data representing updated orbital modeling information and selectively adding the parsed data to unused portions of broadcast messages.
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Accused Products
Abstract
A system for broadcasting GPS assistance data in a wireless communication network to mobile stations is disclosed herein. Each mobile station includes a transceiver operating in the wireless communication network and an integrated GPS receiver to make GPS positioning measurements. The system includes a GPS receiver for obtaining orbital modeling information for visible GPS satellites and DGPS correction data. A transceiver communicates with mobile stations in the wireless communication network. A broadcast controller is operatively associated with the GPS receiver and the transceiver for selectively establishing a direct point-to-point channel with select mobile stations for transferring the orbital modeling information and for periodically broadcasting the DGPS correction data on the wireless communication network to all mobile stations communicating in the wireless communication network.
167 Citations
13 Claims
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1. A method of broadcasting Global Positioning System (GPS) assistance data in a wireless communication network to a mobile stations, each mobile station comprising a transceiver operating in the wireless communication network and an integrated GPS receiver to make GPS positioning measurements, the method comprising the steps of:
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establishing a direct point-to-point channel with a select mobile station;
transferring orbital modeling information on the point-to-point channel to the select mobile station for visible GPS satellites;
broadcasting GPS correction data on the wireless communication network to all mobile stations communicating in the wireless communication network; and
updating assistance data by broadcasting data representing updated orbital modeling information to all mobile stations communicating in the wireless communication network, said updating comprising parsing the data representing updated orbital modeling information and selectively adding the parsed data to unused portions of broadcast messages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of incrementally broadcasting updated Global Positioning System (GPS) assistance data in a wireless communication network to mobile stations, each mobile station comprising a transceiver operating in the wireless communication network and an integrated GPS receiver to make GPS positioning measurements, the mobile stations having past orbital modeling information for recently visible GPS satellites, the method comprising the steps of:
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periodically receiving current orbital modeling information for currently visible satellites;
comparing the received current orbital modeling information to the past orbital modeling information and responsive to any deviations developing updated orbital modeling information; and
broadcasting updated orbital modeling information on the wireless communication network to all mobile stations communicating in the wireless communication network, said broadcasting comprising parsing data representing the updated orbital modeling information and selectively adding the parsed data to unused portions of broadcast messages. - View Dependent Claims (10, 11, 12, 13)
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Specification