The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2026
Filed:
Jan. 17, 2022
Nec Corporation, Tokyo, JP;
Kohei Nakamura, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
A connection state identification system includes an identification information addition means and an identification information acquisition means. When an inspection optical signal, which is an optical signal for inspection transmitted by a first optical communication device to a second optical communication device, is received by the second optical communication device over inter-optical communication device optical paths, which are the optical paths included in the undersea optical cable system between the optical communication devices, the identification information addition means adds, to an unassigned frequency band of the inspection optical signal, the unassigned frequency band being a frequency band other than a frequency band assigned to optical communication, identification information differing for each inter-optical communication device optical path through which the inspection optical signal passes. The identification information acquisition means outputs the identification information in the inspection optical signal received by the second optical communication device.