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. 02, 2007
Filed:
Jul. 19, 2002
Ravichandran Iyer, Freehold, NJ (US);
Manjunath Sampangi, San Jose, CA (US);
Antonio Rodriguez-moral, Madrid, ES;
Paul Bonenfant, Ocean, NJ (US);
Xiaowen Mang, Manalapan, NJ (US);
Leah Zhang, Holmdel, NJ (US);
Ravichandran Iyer, Freehold, NJ (US);
Manjunath Sampangi, San Jose, CA (US);
Antonio Rodriguez-Moral, Madrid, ES;
Paul Bonenfant, Ocean, NJ (US);
Xiaowen Mang, Manalapan, NJ (US);
Leah Zhang, Holmdel, NJ (US);
Meriton Networks US Inc., Wilmington, DE (US);
Abstract
A method for merging protection switching messages in an optical network enables a control of the amount of message bandwidth used for sending protection switching messages. A method for performing protection switching in an optical network does so in an optimal manner by performing the protection switching actions in the various nodes of a protection path in parallel rather than in sequence. To do so, a channel failure message is transmitted from an end node A in the optical network upon detecting a failure in a link in the optical network that includes the end node A. If a failure can be detected at both end nodes, the channel failure messages are transmitted from both end nodes the moment they detect failure without any further waiting. Upon receiving the first channel failure message regardless its originating end node, switching actions in intermediate nodes are initiated. The channel failure messages are forwarded from the intermediate nodes to their corresponding next nodes before completing switching actions in the intermediate nodes. When receiving channel failure response messages, these messages are forwarded to a next node from the intermediate node only after switching actions are complete in the intermediate node.