Title:
OPTICAL CROSS-CONNECT DEVICE, OPTICAL TRANSMISSION SYSTEM, AND METHOD FOR DETECTING ERRONEOUS CONNECTION OF OPTICAL TRANSMISSION LINE
Document Type and Number:
WIPO Patent Application WO/2021/009814
Kind Code:
A1
Abstract:
A monitoring control unit (22) of an OXC (20d) stores a management table (22a) in which respective pieces of information concerning the optical signal modulation method, FEC, and frame mode are stored in association with each other and, upon receiving an input of an LOS alarm from a relay-side optical input/output unit (24) or an LOF alarm from a DSP (25), changes the optical signal modulation method, the FEC, and the frame mode, sequentially. When an appropriate optical signal has been successfully received in accordance with the change, transmission source information contained in the optical signal is acquired, and, in the case when the acquired transmission source information represents an optical cross-connect device at a transmission source different from an original transmission source, it is determined that an erroneous connection has occurred in an optical transmission line of the OXC (20g) serving as a relay device.
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Inventors:
NAMIKI MASATOSHI (JP)
YOKOTA MASAHIRO (JP)
KAWAHARA HIROKI (JP)
TAKECHI HIROTO (JP)
ARAYA KATSUHIRO (JP)
INAMI MASAAKI (JP)
SHIMAZAKI DAISAKU (JP)
MAEDA HIDEKI (JP)
YOKOTA MASAHIRO (JP)
KAWAHARA HIROKI (JP)
TAKECHI HIROTO (JP)
ARAYA KATSUHIRO (JP)
INAMI MASAAKI (JP)
SHIMAZAKI DAISAKU (JP)
MAEDA HIDEKI (JP)
Application Number:
PCT/JP2019/027801
Publication Date:
January 21, 2021
Filing Date:
July 12, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B10/07; H04J14/02
Foreign References:
| US7751726B1 | 2010-07-06 | |||
| JP2012165110A | 2012-08-30 | |||
| JP2018050136A | 2018-03-29 | |||
| JP2009296177A | 2009-12-17 |
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
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