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:
May. 16, 2006
Filed:
Aug. 23, 2000
Stewart Kevin Hester, Belmont, CA (US);
Todd Beine, Los Gatos, CA (US);
Rainer Robert Irasehko, Sunnyvale, CA (US);
Kent Wilfred George Ryhorchuk, Sunnyvale, CA (US);
Stewart Kevin Hester, Belmont, CA (US);
Todd Beine, Los Gatos, CA (US);
Rainer Robert Irasehko, Sunnyvale, CA (US);
Kent Wilfred George Ryhorchuk, Sunnyvale, CA (US);
CIENA Corporation, Linthicum, MD (US);
Abstract
An apparatus and method for fault detection and isolation in an optical network is disclosed in which each node determines an appropriate response to a line fault or an equipment fault, obviating the need for a central computer to coordinate the actions of each node in response to a fault. Each network node includes a local controller and restoration elements for detecting and responding to faults. Each local controller correllates a first set of optical characteristics measured by optical detectors with the local node with a second set of optical characteristics for the channels reported to the local node from an upstream optical element, such as a neighboring upstream node, to determine if a line switch or equipment switch is required. In a preferred embodiment, each node is communicatively coupled to its neighboring node via an optical supervisory channel, with the neighboring nodes communicating status messages and data on channel characteristics via the optical supervisory channel.