TIME PATH SELECTION DEVICE AND TIME PATH SELECTION METHOD

Title:

TIME PATH SELECTION DEVICE AND TIME PATH SELECTION METHOD

Document Type and Number:

WIPO Patent Application WO/2019/163680

Kind Code:

A1

Abstract:

[Problem] To select an optimum transmission path minimizing the total of MTIE values between a plurality of master devices that transmit time information serving as a reference and a specific relay device that receives the time information via a plurality of relay devices and achieves time synchronization. [Solution] A time path selection device 30 selects, between master devices 11, 12 that transmit reference time information and an edge relay device 15 or 16 that receives the time information via a relay device 13 or 14 and achieves time synchronization, a transmission path used for the time synchronization on the basis of MTIE values found by the relay devices 13-16. The time path selection device 30 is provided with: a time information reception unit 31 that receives the MTIE values found by the relay devices 13-16; and an optimum path derivation unit 33 that finds a total MTIE value of each transmission path in the respective transmission paths between the relay device 15 and the master devices 11, 12, selects a transmission path having a minimum total MTIE value (170 ns), and derives the selected transmission path as the transmission path used for the time synchronization.

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Inventors:

SUGIYAMA RYUTA (JP)
ARAI KAORU (JP)
SAKUMA HIROKI (JP)
HISASHIMA TAKAAKI (JP)
TSUBOI SHUNICHI (JP)
KUROKAWA OSAMU (JP)
MATSUMURA KAZUYUKI (JP)

Application Number:

PCT/JP2019/005665

Publication Date:

August 29, 2019

Filing Date:

February 15, 2019

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Assignee:

NIPPON TELEGRAPH & TELEPHONE (JP)

International Classes:

H04L12/725

Foreign References:

JP2013104772A	2013-05-30
JP2002252638A	2002-09-06
JP2012209791A	2012-10-25
JP2016152488A	2016-08-22
JP2009065579A	2009-03-26

Attorney, Agent or Firm:

ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)

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