Patent ID: 11900204
Assignee: AVERY DENNISON RETAIL INFORMATION SERVICES LLC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A method virtually RF shielding an area comprising:
assessing a need for RF shielding the area that accommodates a plurality of articles and respective RFID tags, wherein the RFID tag includes a weight associated with a received signal strength indication of the RFID tag;
deploying a plurality of guard tags within the area to RF shield the area, each guard tag having a weight being based on a received signal strength indication of the guard tag, wherein at least one of the guard tags is a positive guard tag and at least one of the guard tags is a negative guard tag, and the weight of the negative guard tag is higher than the weight of the positive guard tag;
comparing the weight of the guard tags with the weight of the RFID tags;
determine a probability of a location of the RFID tag being based on the weight of the guard tags when compared with the weight of the RFID tag; and
transmitting a RF signal from a RFID reader to a RFID tag to locate the RFID tag within the area.