Walmart Inc.
Systems and methods of establishing RFID null zones in detecting products in a retail environment

Abstract:

Some embodiments provide RFID tag reading systems comprising: multiple sets of RFID readers at a retail shopping facility; a tag evaluation control circuit communicatively coupled with the multiple sets of RFID readers and at least one memory, and configured to: receive RFID tag information from the RFID readers; obtain and apply a first set of rules and identify a transition area within the retail shopping facility based on the received RFID tag information; identify a first set of RFID readers configured to read RFID tags as they move through the identified transition area; obtain and apply a second set of rules and establish a first null area adjacent the transition area configured to enable RFID tags crossing through the first null area and prior to entering the transition area to be in a predefined state when entering the transition area.