Local area network assisted positioning
First Claim
Patent Images
1. A system for locating a position of a wireless device, comprising:
- means for determining a general location of the wireless device;
means for generating an almanac of base stations in range of said wireless device, said almanac being customized for the general location and including at least one uncooperative base stations that will not normally service the wireless device; and
means for determining the position of the wireless device using said almanac.
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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.
330 Citations
23 Claims
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1. A system for locating a position of a wireless device, comprising:
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means for determining a general location of the wireless device;
means for generating an almanac of base stations in range of said wireless device, said almanac being customized for the general location and including at least one uncooperative base stations that will not normally service the wireless device; and
means for determining the position of the wireless device using said almanac. - View Dependent Claims (2, 3, 4, 5)
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6. A system for locating a position of a wireless device, comprising:
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a plurality of base stations in range of said wireless device, including;
an almanac of base station identifiers including a first identifier of a cooperative base station that will normally service the wireless device and send the almanac to the wireless device, and a second identifier of an uncooperative base station that will not normally service the wireless device. - View Dependent Claims (7, 8, 9)
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10. A method of locating a position of a wireless device, comprising:
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receiving a first signal including a first unique identifier from a first base station;
estimating a first distance between the wireless device and the first base station;
referencing a first location of the first base station, wherein the first location is previously determined;
receiving a second signal including a second unique identifier from a second base station;
estimating a second distance between the wireless device and the second base station;
referencing a second location of the second base station, wherein the second location is previously determined;
receiving a third signal including a third unique identifier from a third base station, estimating a third distance between the wireless device and the third base station;
referencing a third location of the third base station, wherein the third location is previously determined;
wherein at least one of the first, second and third base stations is;
capable of communication to remote locations, and unavailable to the wireless device for communication to remote locations;
and calculating the position of the wireless device. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification