Protocol for addressing groups of RFID tags

摘要

A tagging system includes a tag reader and a plurality of RFID tags. The tag reader addresses a group of RFID tags, and the group of RFID tags is a subset of the plurality of RFID tags. Each of the RFID tags in the plurality of RFID tags has a unique identifier. The tag reader transmits a group address having first and second sets of data elements. The data elements in the first set of data elements are substantially equal in value to corresponding ones of the data elements in the identifiers of the group of RFID tags. The data elements in the second set of data elements represent any value for corresponding ones of the data elements in the identifiers of the group of RFID tags. Only the RFID tags having corresponding data elements in their identifiers that match the first set of data elements in the group address respond.