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. 01, 2022
Filed:
Aug. 23, 2019
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Katsuhiro Araya, Tokyo, JP;
Yoshihiko Uematsu, Tokyo, JP;
Toshiyuki Oka, Tokyo, JP;
Hiroki Kawahara, Tokyo, JP;
Hiroshi Yamamoto, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
[PROBLEM TO BE SOLVED] To uninterruptedly change a band of an optical transmission path in a line IF section, which relays a signal transmitted to an optical transmission path in a client IF section to which a communication terminal is connected, to the same band as a changed band in the client IF section without suspending the communication in the line IF section. [SOLUTION] An optical transmission systemA performs processing for changing a band of an optical fiberin a line IF section (L section) that relays a signal from an optical fiberin a client IF section (C section) to the same band as that in the C section. Line IF unitsA andB provided on both sides of the L section set a temporary evacuation lane p as an optical lane having a band different from those of a plurality of optical lanesto n in the optical fiberin the L section, selects either a change-target optical lane (for example, the optical lane) or the temporary evacuation lane p, the change-target optical lane being provided in the optical fiberin the L section and having a band to be changed to a same band as a band in the C section, while causing a buffer unitto absorb a delay difference between a signal received by the change-target optical lane and a signal received by the temporary evacuation lane p, and sets the optical lane not selected to have the same band as the band in the C section.