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

Claim 0:
1. A system for locating a radio frequency identification (RFID) tag in an area comprising:
an RFID tag disposed on an article in 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;
an RFID reader in communication with the RFID tag; and
a plurality of guard tags, each guard tag having a weight, the weight being based on a received signal strength indication of the guard tag and positioned in the area;
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,
the weight of the negative guard tag is higher than the weight of the positive guard tag; and
a probability of a location of the RFID tag is determined based on the weight of the guard tags when compared with the weight of the RFID tag,
wherein the plurality of guard tags is deployable to provide RF shielding to the area.