The invention relates to a tag anti-collision method based on a self-adaptive
hybrid query tree in an RFID (
radio frequency identification)
system. The tag anti-collision method includes firstly, establishing a binary-to-ternary
conversion method for electronic product codes (EPCs) of
electronic tags, secondly, providing a method for constructing a ternary
query tree to identify the tags, thirdly, valuing according to lengths of the EPCs to construct the
hybrid query tree method to solve the problem of coexistence of a
binary tree and a
ternary tree, and finally, setting entry and departure mechanisms to acquire the tag anti-collision method of the self-adaptive
hybrid query tree according to mobility of the tags. The tag anti-collision method based on the self-adaptive hybrid query tree in the RFID (
radio frequency identification)
system has the advantages that the
ternary tree method has optimized performance in the tag anti-collision method based on a
tree structure, the problem that complete ternary conversion of the EPCs fails is solved, the difficulty in identifying the moving tags is overcome, time
delay of identification is shortened well, and the colliding and idling processes are reduced. In addition, the tag anti-collision method is suitable for RFID scenes with large-scale movable tags.