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:
Feb. 19, 2008
Filed:
Oct. 13, 2004
Martin Biddiscombe, Harlow, GB;
Subramaniam Sabesan, Bishops Stortford, GB;
Martin Biddiscombe, Harlow, GB;
Subramaniam Sabesan, Bishops Stortford, GB;
Nortel Networks Limited, St. Laurent, Quebec, CA;
Abstract
A communication network comprises a plurality of nodes which exchange topology information. Some of the nodes are of a conventional type, which propagate topology information in an unrestricted manner while others of the nodes are of a radius-restricted type, which propagate topology information for a restricted distance within the network. Upon receiving a topology advertisement from another node, a node determines what type of node sent the advertisement, and adjusts its operation accordingly. A radius-restricted node forwards a topology advertisement with a metric which indicates the aggregate distance travelled by that advertisement. When a radius-restricted node receives a topology advertisement from a non radius-restricted node, it forwards the topology advertisement with a metric set at a value which will prevent other radius-restricted nodes from installing the topology advertisement. This prevents flooding of unnecessary information.