Title:
TIME SYNCHRONIZATION DEVICE, TIME SYNCHRONIZATION METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2023/073970
Kind Code:
A1
Abstract:
A boundary clock (100), which is a time synchronization device according to this disclosure, includes an offset calculation unit (102) that calculates an offset indicating a difference between the internal device time of an upper device and the internal device time of the boundary clock, a transmission delay time calculation unit (103) that calculates transmission delay times of packets transmitted and received between the upper device and the boundary clock, and a determination unit (111) that determines the location of occurrence of a failure of time synchronization with the upper device on the basis of the offset and the transmission delay times and stops synchronizing the internal device time of a lower device with the internal device time of the boundary clock when determining that the location of occurrence of the failure is the upper device.
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Inventors:
YAMAGATA KEISUKE (JP)
YOSHIHARA SHINICHI (JP)
YAZAWA GO (JP)
NAKANISHI TAKASHI (JP)
YOSHIHARA SHINICHI (JP)
YAZAWA GO (JP)
NAKANISHI TAKASHI (JP)
Application Number:
PCT/JP2021/040163
Publication Date:
May 04, 2023
Filing Date:
October 29, 2021
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04L7/00
Foreign References:
| JP2015216438A | 2015-12-03 | |||
| JP2014183386A | 2014-09-29 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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