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:
Dec. 01, 2020
Filed:
Jun. 29, 2017
Nec Corporation, Tokyo, JP;
Hideo Asada, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
Provided is a technology for simultaneously monitoring a plurality of relay devices. A relay devicecomprises a superimposing unitand a monitor unit. The relay deviceis interposed on an optical transmission path between optical communication devices that send and receive an optical signal, and has a function for relaying the optical signal flowing through the optical transmission path. The monitor unitmonitors the operation status of the relay device. At a predetermined timing, the superimposing unitsuperimposes monitor unitmonitoring-information onto an optical signal of a primary signal flowing through the optical transmission path, by performing modulation processing on the basis of an oscillation signal having a predetermined oscillation frequency. The relay devicecan spontaneously superimpose the monitoring information onto an optical signal and transmit same.