Title:
TIME SYNCHRONIZATION DEVICE, TIME SYNCHRONIZATION METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2023/100299
Kind Code:
A1
Abstract:
A Boundary Clock (100) as a time synchronization device according to the present disclosure comprises: an offset calculation unit (102) for calculating an offset, which is a difference between the intra-device time of a higher-level device and the intra-device time of the Boundary Clock itself; a transmission delay time calculation unit (103) for calculating a transmission delay time of a packet transmitted and received between the higher-level device and the Boundary Clock itself; an offset pattern determination unit (107) for determining a variation pattern of the offset; a transmission delay time pattern determination unit (107) for determining a variation pattern of the transmission delay time; and a failure part determination unit (111) for determining, on the basis of the variation pattern of the offset and the variation pattern of the transmission delay time, a part where a failure has occurred in the time synchronization with the higher-level 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/JP2021/044154
Publication Date:
June 08, 2023
Filing Date:
December 01, 2021
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04L7/00
Foreign References:
| JP2016152488A | 2016-08-22 | |||
| JP2017098694A | 2017-06-01 |
Other References:
NAKANISHI, TAKASHI: "Development and Introduction of High-Precision Time Synchronization Access Systems", NTT TECHNICAL REVIEW, vol. 29, no. 4, 1 April 2017 (2017-04-01), pages 50 - 53, XP009545973
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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