METHOD FOR IDENTIFYING TAGS IN RFID SYSTEM BASED ON THE ALOHA ALGORITHM

摘要

A method for recognizing an RFID tag based on an aloha algorithm is provided to prevent a data loss of a plurality of RFID tags found in a recognition area and increase the speed and accuracy of tag recognition by using an anti-collision technology applying a new tag count estimating method. A tag recognition process is progressed for one round and the number of RFID tags is estimated by counting the number of empty slots(S203). The number of remaining RFID tags is found by using the estimated number of RFID tags. It is determined whether the tag recognition process is continuously performed by using the number of remaining RFID tags. The tag recognition process is terminated if the number of remaining RFID tags is zero, and the tag recognition process is continuously performed if the number of remaining RFID tags is not zero. A frame size used for the next round is determined(S206). The tag recognition process of the next round is performed by using the determined frame size.