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:
Mar. 07, 2006
Filed:
Sep. 24, 2001
John W. Maher, Crystal Lake, IL (US);
Patrick L. Harrington, Palatine, IL (US);
John W. Maher, Crystal Lake, IL (US);
Patrick L. Harrington, Palatine, IL (US);
Motorola, Inc, Schaumburg, IL (US);
Abstract
System and methods for confining multicast routing trees to within single zones of a multi-zone communication systems, thereby enabling faster convergence of the trees relative to trees spanning multiple zones. Separate multicast routing trees are established using different multicast addresses in a source zone and one or more listening zones. Packets for a call distributed by routers () of a packet network within the source zone via a source zone multicast address are received by a source zone packet duplicator (). The source zone packet duplicator forwards the packets, via routers () of the packet network using unicast routing, to various listening zone packet duplicators (). The listening zone packet duplicators, upon receiving the packets, separately distribute the packets within their respective zones via the packet network using different multicast addresses of the listening zones. The source zone and listening zones may be redefined during the call as the source changes or moves to different zones.