US 12,395,240 B2
Optical communication system, failure analysis apparatus, and failure analysis method of optical communication system
Shingo Kuboki, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/908,643
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Mar. 27, 2020, PCT No. PCT/JP2020/014405
§ 371(c)(1), (2) Date Sep. 1, 2022,
PCT Pub. No. WO2021/192316, PCT Pub. Date Sep. 30, 2021.
Prior Publication US 2023/0101899 A1, Mar. 30, 2023
Int. Cl. H04B 10/07 (2013.01); H04B 10/079 (2013.01); H04Q 11/00 (2006.01)
CPC H04B 10/0791 (2013.01) [H04B 10/07 (2013.01); H04B 10/0793 (2013.01); H04Q 2011/0083 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An optical communication system comprising:
an optical transmission line constituting an optical network;
a plurality of terminal stations comprising one or more transponders and configured to communicate via the optical transmission line;
a plurality of failure cause estimators respectively provided in and corresponding to the plurality of terminal stations, wherein each failure cause estimator is configured to
monitor a state of the one or more transponders in a corresponding terminal station, and
estimate a failure probability for each candidate location where a suspected failure occurrence; and
a failure analyzer configured to estimate a location where there is a failure risk occurrence and a failure probability at the location, based on failure probability estimation results of the plurality of failure cause estimators.