| 摘要 |
A method of effectively preventing RFID collision in the same tag recognition environment is provided to reduce required time by the maximum 50% compared to identification of a tag of a difference kind. An initial queue initialized by a 0 state is broadcast to all tags. An identification group that an initial reader will identify is selected by receiving a tag signal in the initialization state. 0 or 1 is queried(S10). Whenever collision about the 0 query occurs, two 0 line tags are generated. 0 line tags are recognized through a repeated query(S20). The number of 1 line tags is checked by grasping the frequency of collision(S30).
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