公开(公告)号：US20180359024A1

公开(公告)日：2018-12-13

申请号：US15778910

申请日：2016-11-22

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takuya ODA ,  Tetsuro INUI ,  Akira HIRANO ,  Wataru IMAJUKU ,  Shoukei KOBAYASHI ,  Takafumi TANAKA ,  Yutaka MIYAMOTO ,  Hidehiko TAKARA

IPC: H04B10/077 ,  H04B10/2581 ,  H04J14/02

CPC classification number: H04B10/0771 ,  H04B10/077 ,  H04B10/2581 ,  H04J14/00 ,  H04J14/02 ,  H04L12/437

Abstract: A communication system which includes: three or more nodes; a multi-core fiber having a plurality of cores, the multi-core fiber being used in at least a partial segment of a connection between the nodes; a detection signal output unit configured to output a fault detection signal transmitted by the core provided in the multi-core fiber configured to connect together the nodes; and a fault detection unit configured to determine whether a fault has occurred between the nodes on the basis of a detection result of the fault detection signal.