Method and apparatus for bandwidth-efficient multicast in...

Details Method and apparatus for bandwidth-efficient multicast in... Method and apparatus for bandwidth-efficient multicast in...

2007-10-30

2007-10-30

Patel, Ajit (Department: 2616)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S432000, C398S098000

Reexamination Certificate

active

10703359

ABSTRACT:
One embodiment of the present invention provides a system that facilitates bandwidth-efficient multicast in EPONs. The system includes a central node and at least one remote node. Downstream data from the central node is broadcast through a passive optical coupler to remote nodes. In the other direction, upstream data from a remote node is transmitted through the passive optical coupler to the central node in a unicast manner. During operation, the system first selects a common multicast LLID to represent a number of remote nodes that comprise a multicast group. Upon receiving a multicast message destined to the multicast group, the system sends the multicast message along with the multicast LLID for the multicast group, whereby the multicast message is broadcast through the passive optical coupler in the downstream direction. This allows each remote node belonging to the multicast group to receive the multicast message by matching the multicast LLID.

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patent: 1119120 (2000-11-01), None
patent: 1351449 (2003-10-01), None

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