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. 07, 2003
Filed:
Feb. 25, 1999
Yunzhou Li, Lowell, MA (US);
Billy Ng, Revere, MA (US);
Nortel Networks Limited, , CA;
Abstract
A technique for reducing reconvergence time by a reconverging device in a PIM-SM domain of a communication system involves sending by the reconverging device to a neighboring device a reconvergence message including a reconvergence indicator, such as a randomly selected Generation Identifier value. In response to the reconvergence message, the neighboring device sends to the reconverging device a PIM Bootstrap Message identifying the Rendezvous Point devices in the PIM-SM domain. The reconverging device creates the appropriate PIM-SM states for the Rendezvous Point devices. Additionally, the neighboring device sends to the reconverging device a PIM Join/Prune Message for each multicast group for which the neighboring device supports a downstream multicast group member. The reconverging device creates the appropriate routing entries for the multicast group memberships, and forwards each PIM Join/Prune Messages towards its corresponding Rendezvous Pointer device. Additionally, the reconverging device detects any directly connected multicast group members, and sends to the neighboring device a PIM Join/Prune Message for each multicast group for which the reconverging device supports a directly connected multicast group member.