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:
Jul. 10, 2001
Filed:
Jun. 24, 1999
Applicant:
Inventors:
Evert de Boer, Nepean, CA;
Peter William Phelps, Nepean, CA;
Louis Rene Pare, St. Bruno, CA;
David Charles Steele, Kanata, CA;
Stephen Wilson, Nepean, CA;
Assignee:
Nortel Networks Limited, Montreal, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/28 ;
U.S. Cl.
CPC ...
G02B 6/28 ;
Abstract
The matched nodes provide protection for a failure in the connection between two bidirectional line switched rings. They use a secondary path in case of a primary path failure. The secondary path is set aside in either the working or protection bandwidth of the rings, thus wasting resources. The invention uses inter-ring protection mechanisms which do away with a specifically set aside secondary path between the primary and secondary nodes.