Local area network assisted positioning
First Claim
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1. A method for assisting in locating a position of a mobile wireless device, comprising:
- determining an approximate location of the mobile wireless device using signals from cooperative base stations within communicable distance of the mobile wireless device;
generating an almanac of base stations based at least in part on proximity of locations of the base stations to the approximate location of the mobile wireless device, the almanac of base stations comprising at least one cooperative terrestrial base station that can communicate with the mobile wireless device in at least one mode that allows unique identification of the mobile wireless device and at least one uncooperative terrestrial base station capable of bi-directional communications but configured to not support bi-directional communications with the mobile wireless device, the at least one uncooperative terrestrial base station being configured to provide information useful in determining a distance; and
providing the almanac of base stations to the mobile wireless device.
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Abstract
A system and method of locating a position of a wireless device in range of one or more base stations. Three signals are received that each contain a unique identifier for a base station. An estimate of the distance between the wireless device and each base station is performed. Previously determined locations for each base station are referenced. At least one of the three base stations is capable of communication to remote locations and unavailable to the wireless device for communication to remote locations.
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Citations
40 Claims
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1. A method for assisting in locating a position of a mobile wireless device, comprising:
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determining an approximate location of the mobile wireless device using signals from cooperative base stations within communicable distance of the mobile wireless device; generating an almanac of base stations based at least in part on proximity of locations of the base stations to the approximate location of the mobile wireless device, the almanac of base stations comprising at least one cooperative terrestrial base station that can communicate with the mobile wireless device in at least one mode that allows unique identification of the mobile wireless device and at least one uncooperative terrestrial base station capable of bi-directional communications but configured to not support bi-directional communications with the mobile wireless device, the at least one uncooperative terrestrial base station being configured to provide information useful in determining a distance; and providing the almanac of base stations to the mobile wireless device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for assisting in locating a position of a mobile wireless device, comprising:
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means for determining an approximate location of the mobile wireless device using signals from cooperative base stations within communicable distance of the mobile wireless device; means for generating an almanac of base stations based at least in part on proximity of locations of the base stations to the approximate location of the mobile wireless device, the almanac of base stations comprising at least one cooperative terrestrial base station that can communicate with the mobile wireless device in at least one mode that allows unique identification of the mobile wireless device and at least one uncooperative terrestrial base station capable of bi-directional communications but configured to not support bi-directional communications with the mobile wireless device, the at least one uncooperative terrestrial base station being configured to provide information useful in determining a distance; and means for providing the almanac of base stations to the mobile wireless device. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A computer system comprising:
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a network interface; and a processor configured to; determine an approximate location of a mobile wireless device using signals from cooperative base stations within communicable distance of the mobile wireless device; generate an almanac of base stations based at least in part on proximity of locations of the base stations to the approximate location of the mobile wireless device, the almanac of base stations comprising at least one cooperative terrestrial base station that can communicate with the mobile wireless device in at least one mode that allows unique identification of the mobile wireless device and at least one uncooperative terrestrial base station capable of bi-directional communications but configured to not support bi-directional communications with the mobile wireless device, the at least one uncooperative terrestrial base station being configured to provide information useful in determining a distance; and provide the almanac of base stations to the mobile wireless device. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A tangible computer-readable medium, having stored thereon computer-readable instructions for assisting in locating a position of a mobile wireless device, comprising instructions configured to cause a computer to:
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determine an approximate location of the mobile wireless device using signals from cooperative base stations within communicable distance of the mobile wireless device; generate an almanac of base stations based at least in part on proximity of locations of the base stations to the approximate location of the mobile wireless device, the almanac of base stations comprising at least one cooperative terrestrial base station that can communicate with the mobile wireless device in at least one mode that allows unique identification of the mobile wireless device and at least one uncooperative terrestrial base station capable of bi-directional communications but configured to not support bi-directional communications with the mobile wireless device, the at least one uncooperative terrestrial base station being configured to provide information useful in determining a distance; and provide the almanac of base stations to the mobile wireless device. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification