Optimized multicast distribution within a hybrid PPPoE/IPoE...

Details Optimized multicast distribution within a hybrid PPPoE/IPoE... Optimized multicast distribution within a hybrid PPPoE/IPoE...

2005-09-21

2009-08-18

Shah, Chirag G (Department: 2419)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S390000, C370S400000, C370S432000

Reexamination Certificate

active

07577137

ABSTRACT:
An access node (e.g., DSLAM) and method for optimizing the distribution of a multicast stream within a hybrid PPPoE/IPoE broadband assess network are described herein. In the preferred embodiment, the DSLAM snoops upstream IGMP messages encapsulated within PPPoE frames, and forwards them transparently towards a BRAS (located in an Ethernet aggregation network). In addition, the DSLAM duplicates the IGMP message and sends the duplicated IGMP message encapsulated within IPoE frames towards the standard Ethernet switches (located in the Ethernet aggregation network). The IPoE encapsulated IGMP message can be snooped by the standard Ethernet switches. This functionality of the DSLAM ensures the optimal multicast distribution by the Ethernet aggregation network.

REFERENCES:
patent: 2004/0100970 (2004-05-01), Gerdisch et al.
patent: 2006/0047845 (2006-03-01), Whited et al.
DSL Forum (Layer 2 Control Mechanism For Architecture and Transport Working Group, Revision 2, Aug. 2004).
Shoaf S. et al: “IGMP Capabilities in Broadband Network Architectures”, Juniper Networks, Inc., www.juniper.net. Mar. 2005, pp. 18-22.
“IGMP Proxying vs Transparent Snooping: WT-101 Applicability”, DSL Forum document # dsl2004.471.00 by Jerome Moisand, Juniper Networks (Dec. 7-9, 2004).
“High level requirements for IPTV multicast delivery via PPPoE”, BellSouth's functional specification (Dec. 13, 2004).
“The Public Ethernet-The next-generation broadband access network” Michael Begley, 2004.

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