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:
Apr. 05, 2016
Filed:
Jun. 23, 2011
Shaowei Huang, Tokyo, JP;
Itaru Nishioka, Tokyo, JP;
Shaowei Huang, Tokyo, JP;
Itaru Nishioka, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
[Technical Problem] Placing optical performance monitors at all of nodes and links in a network results in a high monitoring capital expenditure (CAPEX). [Solution to Problem] A controller connected to a network and a plurality of nodes includes: a first degraded path detecting means for detecting a wavelength path as a first degraded path, whose quality is detected to be degraded, based on received parameter of wavelength paths in the network; a correlation path computation means for computing a correlation path which is correlated to the first degraded path; a second degraded path detecting means for detecting a second degraded path from the correlation path; and a failure localization means for localizing a node or a link connecting nodes as a failure node or a failure link, wherein the node or the link are traversed by both of the first degraded path and the second degraded path.