Method and system for providing assistance data for A-GPS location of handsets in wireless networks
First Claim
1. A method for determining the location of a wireless device, comprising the steps of:
- (a) determining a boundary for an approximate area in which the wireless device is located;
(b) determining a plurality of satellites that are observable along said boundary;
(c) transmitting assistance data to said device, said assistance data including information from said plurality of satellites; and
(d) determining the location of the wireless device from said information, in response to receiving said assistance data.
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0 Petitions
Accused Products
Abstract
A system and method for determining the location of a wireless device. A boundary for an approximate area in which the wireless device is located is determined and a plurality of satellites may be determined as a function of the boundary. Assistance data is transmitted to the device which includes information from the plurality of satellites, and the location of the wireless device may be determined from the information. In one embodiment, if the number of the plurality of satellites is greater than a predetermined threshold then the number of satellites may be reduced as a function of one or more of the elevation of each satellite above the horizon, a distance between each satellite to one or more other satellites, and an altitude of each satellite.
201 Citations
22 Claims
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1. A method for determining the location of a wireless device, comprising the steps of:
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(a) determining a boundary for an approximate area in which the wireless device is located; (b) determining a plurality of satellites that are observable along said boundary; (c) transmitting assistance data to said device, said assistance data including information from said plurality of satellites; and (d) determining the location of the wireless device from said information, in response to receiving said assistance data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for estimating the location of a device, comprising the steps of:
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(a) determining a boundary for a region in which the device is located; (b) determining two or more available satellites that are observable along said boundary; (c) receiving, at the device, assistance data from a communications network, said assistance data including information from said two or more available satellites; (d) receiving, at the device, a plurality of signals comprising one signal from each of the two or more available satellites; and (e) estimating, at the device, a location of the device as a function of said plurality of signals. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A system for determining the location of a device from signals received from a plurality of Global Navigation Satellite System (“
- GNSS”
) satellites comprising;(a) circuitry for determining a boundary for an approximate area in which a wireless device is located; (b) circuitry for determining a first plurality of satellites that are observable along said boundary; (c) a transmitter for transmitting assistance data to said wireless device, said assistance data including information from said first plurality of satellites; and (d) circuitry for determining, at the wireless device, the location of the wireless device from said information included in said assistance data. - View Dependent Claims (19, 20, 21, 22)
- GNSS”
Specification