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. 31, 2005
Filed:
Jun. 26, 2000
Guo Qiang Q. Wang, Nepean, CA;
Kent E. Felske, Kanata, CA;
Wenfeng Chen, Kanata, CA;
Chenjiang HU, Nepean, CA;
Liangyu L. Jia, Kanata, CA;
Guo Qiang Q. Wang, Nepean, CA;
Kent E. Felske, Kanata, CA;
Wenfeng Chen, Kanata, CA;
Chenjiang Hu, Nepean, CA;
Liangyu L. Jia, Kanata, CA;
Nortel Networks Limited, , CA;
Abstract
In a packet-switched network having a plurality of nodes interconnected by links, pre-defined protection paths provide protection of a selected plurality of links. Adjacent nodes connected by a protected link are adapted to detect a failure of the protected link, to encapsulate packets within tunnel packets, to differentiate between tunnel packets and non-tunnel packets and to exchange the tunnel packets via a protection path rather than via the failed link. This results in faster automatic protection switching of packet-based traffic. The invention is particularly suited to an Internet Protocol network.