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. 07, 2008
Filed:
Jun. 30, 2003
Jeffrey Gullicksen, Mountain View, CA (US);
Neena Aluri, Alpharetta, GA (US);
Theodore E. Tedijanto, Cupertino, CA (US);
William Kish, Saratoga, CA (US);
Jeffrey Gullicksen, Mountain View, CA (US);
Neena Aluri, Alpharetta, GA (US);
Theodore E. Tedijanto, Cupertino, CA (US);
William Kish, Saratoga, CA (US);
Ciena Corporation, Linthicum, MD (US);
Abstract
A method, system and egress switching node for maintaining a network connection in an optical network reduces the number of spans needed for reestablishing a network connection. The invention learns which channels are used by the network connection and propagates such channel assignment data to the switching nodes for storage therein. When a span failure occurs, a notification is sent to the switching nodes identifying which span has failed. The switch nodes use the notification and channel assignment data to perform protection switching such that the rerouted network connection selects the channel that was used by the network connection on the failed span. Likewise, the egress switching node uses the selected channel to drop the network connection from the protecting fibers. This enables a network connection to travel a shorter distance after a protection switch.