Access Point Database
1 Assignment
0 Petitions
Accused Products
Abstract
A location beacon database and server, method of building location beacon database, and location based service using same. Wi-Fi access points are located in a target geographical area to build a reference database of locations of Wi-Fi access points. At least one vehicle is deployed including at least one scanning device having a GPS device and a Wi-Fi radio device and including a Wi-Fi antenna system. The target area is traversed in a programmatic route to avoid arterial bias. The programmatic route includes substantially all drivable streets in the target geographical area and solves an Eulerian cycle problem of a graph represented by said drivable streets. While traversing the target area, periodically receive the GPS coordinates of the GPS device. While traversing the target area, detecting Wi-Fi signals from Wi-Fi access points in range of the Wi-Fi device and recording identity information of the detected Wi-Fi access point in conjunction with GPS location information of the vehicle when the detection of the Wi-Fi access point was made. The location information is used to reverse triangulate the position of the detected Wi-Fi access point; and the position of the detected access point is recorded in a reference database.
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Citations
55 Claims
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1-28. -28. (canceled)
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29. A database of identified 802.11 access points in at least one target area having a radius on the order of at least miles, said database comprising:
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a plurality of database records recorded in a computer-readable medium for substantially all of the identified access points in the target area, each database record including for one of the identified access points, identification information, and access point position information for the one of the identified access points calculated from readings of the one of the access points from a plurality of reference locations distributed around more than one side of the one of the access points to reduce negative effects of arterial bias in the position information calculated therefrom. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A database of identified 802.11 access points, such as Wi-Fi access points, in at least one target area having a radius on the order of at least miles, said database comprising:
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a plurality of database records recorded in a computer-readable medium for substantially all of the identified access points in the target area, each database record including for one of the identified 802.11 access points, identification information, and calculated position information based on readings from a plurality of locations providing reference symmetry in the readings to reduce negative effects of arterial bias in the calculated position information.
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44. A database of 802.11 access points for at least one target area having a radius on the order of at least miles, said database being recorded in a computer-readable medium, said database comprising:
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a plurality of database records including data base records for substantially all of the identified 802.11 access points in the target area, wherein each said record includes identification information, and position information calculated from readings of that 802.11 access point from a plurality of locations within the target area with sufficient reference symmetry to avoid arterial bias. - View Dependent Claims (45, 46, 47, 48, 49)
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50. A database of 802.11 access points for at least one target area having a radius on the order of at least miles, said database being recorded in a computer-readable medium and comprising:
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database records for substantially all of the identified 802.11 access points in the target area, each database record including identification information for a corresponding 802.11 access point, and calculated position information and readings from a plurality of locations within the target area for the corresponding 802.11 access point, wherein said calculated position information is obtained from calculations based on readings of the corresponding 802.11 access point from a plurality of locations within the target area to provide reference symmetry when calculating the position of the 802.11 access point in order to avoid arterial bias in the calculated position information.
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51. A database of 802.11 access points for at least one target area having a radius on the order of at least miles, said database being recorded in a computer-readable medium and database records for substantially all of the identified 802.11 access points in the target area, each database record comprising:
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identification information for a corresponding 802.11 access point; and recorded readings from a plurality of locations within the target area for the corresponding 802.11 access point, wherein said calculated position information is obtained from calculations based on readings of the corresponding 802.11 access point from a plurality of locations within the target area to provide reference symmetry when calculating the position of the 802.11 access point in order to avoid arterial bias in the calculated position information.
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52. A database of 802.11 access points for at least one target area having a radius on the order of at least miles, said database being recorded in a computer-readable medium and comprising database records for a sufficient number of 802.11 access points in the target area to calculate position information, each database record comprising:
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identification information for a corresponding 802.11 access point; and calculated position information for the corresponding 802.11 access point, wherein said calculated position information was obtained from calculations based on readings of the corresponding 802.11 access point from a plurality of locations within the target area to provide reference symmetry when calculating the position of the 802.11 access point in order to avoid arterial bias in the calculated position information.
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53. A database of 802.11 access points for at least one target area having a radius on the order of at least miles, said database being recorded in a computer-readable medium and including database records for substantially all of the identified 802.11 access points in the target area, each record comprising:
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identification information for a corresponding 802.11 access point; and calculated position information for the corresponding 802.11 access point, wherein said calculated position information is obtained from recording multiple readings of the 802.11 access point from a plurality of locations when calculating the position of the 802.11 access point in order to reduce arterial bias in the calculated position information. - View Dependent Claims (54)
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55. A database of 802.11 access points for at least one target area having a radius on the order of at least miles, said database being recorded in a computer-readable medium and comprising:
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database records for a sufficient number of access points in the target area to calculate position information, each database record including, identification information for a corresponding access point and calculated position information for the corresponding access point, wherein said calculated position information is obtained from calculations based on readings of the corresponding access point from a plurality of locations within the target area to provide reference symmetry when calculating the position of the 802.11 access point in order to avoid arterial bias in the calculated position information.
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Specification