The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 16, 2004
Filed:
Feb. 28, 2003
Peter J. Armbruster, Chandler, AZ (US);
Keith A. Olds, Mesa, AZ (US);
David T. Gustafson, Gilbert, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A method for location determination using Bluetooth techniques is applicable within buildings, underground or within other structures. A mobile unit ( ) seeks the location of a cell from location master ( ). Location master ( ) and a number of location subsidiaries ( ) determine ranging information with regard to the mobile unit ( ) using Bluetooth techniques. The location master ( ) then determines the mobile unit location using least squares estimation or other triangulation methods ( ). In an alternate embodiment, ranging information is fine tuned for noise and error measurements between the location master and the location subsidiaries ( ) are used.