In radio frequency identification（RFID） system

there is one possibility that many electronic tags response one reader at the same time

which will cause electronic tag collision.An enhanced dynamic frame slotted ALOHA algorithm for anti-collision in RFID systems is proposed by analyzing frame slotted ALOHA algorithm. This algorithm makes the RFID system get the maximum throughput and improve the tags recognition efficiency by estimating the tag number within the scope of the reader and setting the best frame length.Simulation results show that the property of the proposed algorithm is improved

compared with traditional ALOHA algorithm.