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. 09, 2006
Filed:
Nov. 14, 2003
Evert DE Boer, Nepean, CA;
David Steele, Kanata, CA;
Peter Phelps, Nepean, CA;
Louis-rene Pare, St. Bruno, CA;
Robert Caporuscio, Montreal, CA;
Evert de Boer, Nepean, CA;
David Steele, Kanata, CA;
Peter Phelps, Nepean, CA;
Louis-Rene Pare, St. Bruno, CA;
Robert Caporuscio, Montreal, CA;
Nortel Networks Limited, St. Laurent, CA;
Abstract
A method and corresponding network element configuration for delivering communications services between first and second survivable rings, each comprising a respective plurality of network elements, at least two of which are common to both rings. For each particular service, one of the common network elements is designated as a primary gateway node and another as a secondary gateway node. A primary inter-ring connection is established for the particular service by a switch at the primary gateway node, but no inter-ring connection is established at the secondary gateway node. The secondary gateway node comprises a controller for monitoring the status of the primary gateway node and establishing a new inter-ring connection for delivery of the service upon detecting a failure of the primary gateway node. This provides survivable inter-ring traffic which is bandwidth-efficient and with a low switching delay.