To resolve the problem of the tree-based anti-collision algorithm which produces many idle time slots and invalid collision time slots in the RFID system

an anti-collision algorithm based on Coding and Jumping Tree(CJT) structure is proposed. By coding tag ID information and determining tag prefix in the system

the inquiry command was optimized; when the collision happens

judging whether the R sequence was the same

detecting the validity of collision

put the ID codes for effective collision into the stack and skipping invalid collision. Simulation results show that the new algorithm avoids idle time slots

reduce the number of collision time slots

then can lower the delay of tag identification and improve the throughput of the system up to 0.625.