US 12,237,866 B2
Method and system for detecting an improper protection in an optical communication network
Zhiping Jiang, Kanata (CA); Jiachuan Lin, Quebec (CA); and Behnam Naghdi, Ottawa (CA)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Mar. 14, 2023, as Appl. No. 18/183,256.
Prior Publication US 2024/0313858 A1, Sep. 19, 2024
Int. Cl. H04B 10/07 (2013.01); H04B 10/071 (2013.01); H04B 10/077 (2013.01); G01M 11/00 (2006.01); H04B 10/03 (2013.01); H04B 10/032 (2013.01); H04B 10/25 (2013.01); H04J 14/02 (2006.01)
CPC H04B 10/0771 (2013.01) [H04B 10/071 (2013.01); H04B 10/0775 (2013.01); G01M 11/3109 (2013.01); G01M 11/3136 (2013.01); H04B 10/03 (2013.01); H04B 10/032 (2013.01); H04B 10/07 (2013.01); H04B 10/25 (2013.01); H04J 14/02 (2013.01); H04J 14/0287 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for detecting an improper protection in an optical communication network, the method comprising:
receiving, by a first Coherent-Optical Time Domain Reflectometer (C-OTDR), a first reflected optical signal from a first optical fiber;
receiving, by a second C-OTDR, a second reflected optical signal from a second optical fiber;
pre-processing, by a processor, the first reflected optical signal and the second reflected optical signal;
determining, by the processor, a category of the first C-OTDR and the second C-OTDR;
wherein, upon determining that the category of the first C-OTDR and the second C-OTDR is distributed acoustic sensing (DAS), computing a correlation between the first preprocessed reflected optical signal and the second preprocessed reflected optical signal based on a first correlation computation technique;
wherein, upon determining that the category of the first C-OTDR and the second C-OTDR is distributed vibration sensing (DVS), computing a correlation between the first preprocessed reflected optical signal and the second preprocessed reflected optical signal based on a second correlation computation technique; and
based on the computed correlation, detecting the improper protection in the optical communication network.