Patent ID: 8953570
Filing Date: 2015-02-10
Classification: G01S,G06K

Abstract:
1. A method of operating a radio frequency identification (RFID) system, the method comprising: generating an RFID interrogation signal with an RFID reader of the RFID system; obtaining, in response to generating the RFID interrogation signal, at least one RFID tag response signal at the RFID reader, the at least one RFID tag response signal conveying tag data, and being received through a first network at a stationary controller; and providing at least some of the tag data to a mobile device through a second network; receiving, from the mobile device, a request to locate a particular item of interest having a target RFID tag associated therewith, wherein the at least one RFID tag response signal conveys tag data for the particular item of interest; determining a location of the target RFID tag relative to the mobile device; and presenting indicia of the determined location of the target RFID tag at the mobile device; interrogating the target RFID tag to obtain a first tag response signal, wherein the RFID reader interrogates the target RFID tag; interrogating a reference RFID tag located at the mobile device to obtain a second tag response signal, wherein the RFID reader interrogates the reference RFID tag; and calculating a position of the target RFID tag relative to the reference RFID tag, wherein the position is calculated based on the first and second tag response signals.