Time synchronization device, time synchronization system, and time synchronization method
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United States of America Patent
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Jan 26, 2021
Grant Date -
Jun 22, 2017
app pub date -
Feb 10, 2015
filing date -
Feb 13, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
In order to simplify calculation of delay time lengths in a time synchronization device in a packet network, when executing time synchronization using a synchronization signal sent via the packet network, this time synchronization device 20 includes: a data receiving unit 21 that receives synchronization information including a time correction field used when correcting synchronization time information in a client device 30; a before-data-processing time correcting unit 22 that updates the time correction field by subtracting information indicating a time at which synchronization information is received, from the time correction field; an after-data-processing time correcting unit 23 that updates the time correction field by adding information indicating a time after performing data processing on the synchronization information, to the time correction information of the time correction field updated by the before-data-processing time correcting unit 22; and a data sending unit 24 that sends the updated synchronization information to the client device 30.
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