Positioning Server

• US 20150198694A1
• Filed: 03/24/2015
• Published: 07/16/2015
• Est. Priority Date: 05/02/2012
• Status: Active Grant

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Waters, Deric Wayne, Janardhanan, Jayawardan
• Granted Patent: US 9,891,326 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01S 19/03 Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
• CPC Class Codes: G01S 19/46 the supplementary measurement being of a radio-wave signal type
• CPC Class Codes: G01S 19/48 by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system
• CPC Class Codes: G01S 5/02524 Creating or updating the radio-map
• CPC Class Codes: G01S 5/14 Determining absolute distances from a plurality of spaced points of known location

Abstract

A positioning server has a positioning database. The positioning database is configured to store information relating wireless local area network (WLAN) access point (AP) signal measurements to points of a geographic positioning grid. motion information provided by dead-reckoning systems of a plurality of wireless devices and reference location information provided by at least one of a satellite positioning system and a wireless local area network (WLAN) positioning system of each wireless device is also stored. WLAN access point (AP) signal measurements acquired by each wireless device in correspondence with the motion information is stored as are non-causally determine positions of the wireless devices based on the motion information and reference locations. Positioning server is also configured to generate a geographic positioning grid that relates the AP signal measurements to points of the positioning grid based on the determined positions.

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26. A positioning server, comprising:

a positioning database configured to;

store information relating wireless local area network (WLAN) access point (AP) signal measurements to points of a geographic positioning grid;

store motion information provided by dead-reckoning systems of a plurality of wireless devices and reference location information provided by at least one of a satellite positioning system and a wireless local area network (WLAN) positioning system of each wireless device;

store WLAN access point (AP) signal measurements acquired by each wireless device in correspondence with the motion information;

non-causally determine positions of the wireless devices based on the motion information and reference locations;

generate a geographic positioning grid that relates the AP signal measurements to points of the positioning grid based on the determined positions.

27. The positioning server of claim 26, wherein the positioning database is configured to determine a position of each wireless device corresponding to given motion information provided by the wireless device for each of a plurality of reference locations provided by the wireless device.

28. The positioning server of claim 26, wherein the positioning database comprises a map of an area corresponding to the positioning grid, and the positioning database is configured to determine positions of the wireless devices based on the map.

29. The positioning server of claim 26, wherein the positioning database is configured to relate the points of the positioning grid to at least one measurement of a signal selected from:

personal area network signals, broadcast frequency modulated signals, wireless telephony signals, broadcast digital television signals, and magnetic field strength.