Fast Transition for Couple-Resolution Blocking Protocol in RFID Systems

RFID applications such as monitoring an object for a long time need to identify tags repeatedly within the scope of the reader. Re-identification process can be improved using the tag information obtained in the previous cycle. CRB protocol utilizes the blocking technique that distinguishes staying tags and arriving tags. Staying tags are re-identified by utilizing the previous tag information in the first phase. In this paper, we propose fast transition algorithm to improve the CRB protocol. If the staying tag ratio is lower than a certain threshold, reader immediately proceeds to the second phase where the existing query tree protocol is used. We show the fast transition improves the identification efficiency of CRB protocol through computer simulation.