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. 05, 2009
Filed:
Dec. 02, 2003
Nabil Seddigh, Ottawa, CA;
Biswajit Nandy, Ottawa, CA;
Paul David Obeda, Ottawa, CA;
Douglas Heath Patriarche, Ottawa, CA;
Udo Mircea Neustadter, Ottawa, CA;
Nabil Seddigh, Ottawa, CA;
Biswajit Nandy, Ottawa, CA;
Paul David Obeda, Ottawa, CA;
Douglas Heath Patriarche, Ottawa, CA;
Udo Mircea Neustadter, Ottawa, CA;
Alcatel-Lucent Canada Inc., Kanata, Ontario, CA;
Abstract
A method for monitoring lightpaths in an optical network comprising nodes interconnected by wavelength-multiplexed links is disclosed. Each lightpath is identified by a respective optical signature. A node stores identifiers of optical signatures of lightpaths designated to traverse the node and identifiers of adjacent nodes. Each node also maintains a record of all optical signatures it detects. A command-line interface associated with a selected node tracks a selected lightpath, designated to traverse the selected node, by propagating messages in an upstream direction, a downstream direction, or both, requesting other nodes to provide information pertinent to the selected lightpath. The selected node may also send messages to all its neighboring nodes requesting each to indicated detection, or otherwise, of the selected lightpath. Thus, the method relies on localized information, maintained at each node, and cooperative exchange of data among nodes without interacting with a centralized network management facility.