Time synchronization method for communication system, slave station apparatus, master station apparatus, control device, and program
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United States of America Patent
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Feb 16, 2016
Grant Date -
Oct 10, 2013
app pub date -
Feb 6, 2012
filing date -
Feb 8, 2011
priority date (Note) -
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Abstract
A time synchronization method for a communication system configured to perform protection switching, the communication system including a first network in which a master station and a slave station are connected via plural physical lines including a working line and a backup line and a second network connected to the slave station, the method including a time synchronization in which the slave station executes, when not detecting a communication failure of a downlink signal transmitted from the master station, synchronization processing for synchronizing, based on a clock of the slave station and timing information, time information transmitted to the second network with time information included in a time synchronization command and suppresses, when detecting a communication failure or receiving a switching notification from the master station apparatus, a synchronization error due to a difference between the clock of the slave station and the timing information.
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