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:
Mar. 19, 2013
Filed:
Oct. 12, 2009
Julius S. Gyorfi, Vernon Hills, IL (US);
Benjamin J. Benkritsky, Modiin, IL;
Timothy J. Collins, Homer Glen, IL (US);
Tom Mathew, Skokie, IL (US);
Swee M. Mok, Palatine, IL (US);
Julius S. Gyorfi, Vernon Hills, IL (US);
Benjamin J. Benkritsky, Modiin, IL;
Timothy J. Collins, Homer Glen, IL (US);
Tom Mathew, Skokie, IL (US);
Swee M. Mok, Palatine, IL (US);
Motorola Solutions, Inc., Schaumburg, IL (US);
Abstract
A method and apparatus for determining a range within a wireless communication system is provided herein. The range information can then be used to locate a node (e.g., an asset tag). During operation, the minimum transmission power of a source transceiver (e.g., an RFID reader) that enables a tag to be detected will be used to indicate distance. Changes in transmit power will be used to indicate relative changes in distance to a particular node. The reader will be configured to always operate at a transmission power that will result in a certain percentage (e.g., 50%) detection rate for a target transceiver (e.g., an RFID asset tag). As the reader moves closer to the tag, the minimum detection power will decrease; as it moves farther from the tag, the minimum detection power will increase. This information is displayed to give a general change in range information between the RFID reader and the asset tag (e.g., increasing range or decreasing range). An individual will be able to easily locate the asset tag by using the displayed information.