A new anti-collision method for RFID systems

Anti-collision technology in RFID system plays an essential role in the process of recognizing tags. Framed-Slotted structure makes it more convenient and effective for ALOHA anti-collision algorithm. But when the number of tags, especially the range of tag number, is unknown, it will be very hard for the system to initialize the suitable frame size. Furthermore, the frame size is related to system efficiency. In this paper, we proposed a more efficient and smarter scheme based on Dynamic Framed-Slotted ALOHA (DFSA) with interrupt mechanism. Compared with some other existing methods, the performance of the new proposed scheme is better when the range of tag number is very wide.