Adaptive Binary Splitting: A RFID Tag Collision Arbitration Protocol for Tag Identification

In the RFID system, a reader recognizes tags through communication over a shared wireless channel. When more than one tag transmits their IDs at the same time, the tag-to-reader signals lead to collide and collision disturbs the reader's identification process. Therefore, tag collision arbitration for passive RFID tags is significant for fast identification. This paper presents an Adaptive Binary Splitting (ABS) protocol which is an improvement on the binary tree protocol. To reduce collisions and identify tags efficiently, ABS use information which is obtained from the last processes of tag identification. Our performance evaluation shows that ABS outperforms existing tree based tag anti-collision protocols.