US 12,009,855 B2
Monitoring system, monitoring device, and monitoring method
Yoshinori Kitahara, Tokyo (JP); Yoshiaki Aono, Tokyo (JP); Yuusuke Sakurai, Tokyo (JP); and Tadayuki Iwano, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/799,378
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Mar. 4, 2020, PCT No. PCT/JP2020/009053
§ 371(c)(1), (2) Date Aug. 12, 2022,
PCT Pub. No. WO2021/176581, PCT Pub. Date Sep. 10, 2021.
Prior Publication US 2023/0061220 A1, Mar. 2, 2023
Int. Cl. H04B 10/08 (2006.01); G01H 9/00 (2006.01); H04B 10/079 (2013.01)
CPC H04B 10/0791 (2013.01) [G01H 9/004 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A monitoring system comprising:
a receiving unit configured to receive, from an optical fiber, an optical signal containing information indicating an environmental state;
a detecting unit configured to detect at least one of an accident or an incident and a location of the accident or the incident based on the information indicating the environmental state; and
a broadcasting unit configured to, in response to the detecting unit detecting the accident or the incident:
broadcast that the accident or the incident has occurred to an external terminal; and
notify the external terminal of the location of the accident or the incident.