A framework of tag anti-collision algorithm for fast identification in RFID system

The problems of identifying a set of tagged objects simultaneously in an RFID network have hampered the adoption of RFID universally. When multiple tags transmit their IDs in a single period of time to a single reader over a shared wireless channel, the tag signals may collide. This collision will disturb the reader's identification process. Hence, we proposed a modified version of Accelerated Frame Slotted ALOHA protocol called Hasten Dynamic Frame Slotted ALOHA (HEDFSA) to condense a number of retransmission for one tag, besides reducing the probability of colliding tags. In HEDFSA, the colliding tags in the first round reading will be identified in the next reading. It is expected that our protocol performance would be better in terms of shorter time in identifying process of tags since number of tag collision problems has been reduced.