SYNCHRONIZATION METHOD BETWEEN READER AND TAG

摘要

A synchronization method between a reader and a tag are provided to perform accurate synchronization between the reader and the tag through the calculation of a message delay time and a clock offset. A reader transmits a write command message(111) to a tag in the first time, and the tag transmits a response message corresponding to a first write command message to the reader. The reader transmits a second write command message including the time information as to the first time. By using the difference between the first time and the second time, the tag corrects the clock offset.