| 摘要 |
PURPOSE: A clock synchronization method between a master device and a master device is provided to generate clocks synchronized with a master device by quickly estimating a time offset and a frequency drift between the master device and a slave unit. CONSTITUTION: A slave device transmits and receives a necessary message for synchronization to/from a master device(S310). The slave device samples offset values and TOD(Time of Day) values(S320). The slave device samples calculated offset values and the TOD values which are transmitted from the master device over the predetermined number of times(S330). The slave device determines a drift initial value according to the relationship of the TOD values and the offset values(S340). The slave device estimates the frequency drift value of the slave device in an error feedback mechanism(S350). The slave device synchronizes the frequency of the slave device with the master device by using the estimated drift value(S360).
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