APPARATUS FOR ADJUSTING TIME SYNCHRONIZATION PERIOD AND METHOD FOR DETERMINATING TIME SYNCHRONIZATION PERIOD

According to embodiments of the present invention, a time synchronization slave device comprises: a time synchronization processing unit for determining an offset and a rate for correcting local time according to a time error calculated by performing a time synchronization operation with a time sync...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: JEON, JAE WOOK, KIM, JIN HO, KIM, YONG JU, CHEON, BO MU
Format: Patent
Sprache:eng ; kor
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Beschreibung
Zusammenfassung:According to embodiments of the present invention, a time synchronization slave device comprises: a time synchronization processing unit for determining an offset and a rate for correcting local time according to a time error calculated by performing a time synchronization operation with a time synchronization master device which provides global time; a timer for correcting the local time according to the offset and the rate determined every time the synchronization operation is carried out; a time error estimation unit for estimating an estimated time error that may occur at the local time during a current time synchronization period between a previous time synchronization operation and a next time synchronization operation, and generating error excess information on an excessive point where the estimated time error exceeds a predetermined allowable time error range; a time synchronization period determination unit for determining the next time synchronization period which is expected to perform a next time synchronization operation after the current time synchronization period expires; and a synchronization period information transmission unit for transmitting synchronization period information on the determined next time synchronization period to the time synchronization master device.