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:
Oct. 03, 2017
Filed:
Oct. 21, 2014
Applicant:
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Inventors:
Assignee:
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/00 (2013.01); H04B 10/032 (2013.01); H04B 10/272 (2013.01); H04J 14/02 (2006.01); H04J 14/08 (2006.01); H04Q 11/00 (2006.01); H04L 12/26 (2006.01); H04L 12/24 (2006.01);
U.S. Cl.
CPC ...
H04B 10/032 (2013.01); H04B 10/272 (2013.01); H04J 14/0256 (2013.01); H04J 14/0268 (2013.01); H04J 14/0282 (2013.01); H04J 14/0294 (2013.01); H04J 14/08 (2013.01); H04Q 11/0067 (2013.01); H04L 41/0663 (2013.01); H04L 43/0864 (2013.01); H04Q 2011/0016 (2013.01); H04Q 2011/0081 (2013.01); H04Q 2213/1301 (2013.01);
Abstract
In an optical communication abnormality-recovery system and method, when an abnormality occurs in transmission and reception of one wavelength of an optical line terminal of a PON system, an optical network unit that is performing communication at a certain wavelength switches the wavelength for performing the communication to another backup wavelength that is instructed in advance. The optical line terminal also performs switching so that the communication is performed using the same backup wavelength as in the optical network unit.