Multicast transmission method in GEM mode in Gigabit-capable...

Details Multicast transmission method in GEM mode in Gigabit-capable... Multicast transmission method in GEM mode in Gigabit-capable...

2004-06-16

2008-11-11

Jagannathan, Melanie (Department: 2619)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S389000, C370S392000, C398S099000

Reexamination Certificate

active

07450551

ABSTRACT:
A multicast transmission method in GEM mode in Gigabit-capable passive optical network and a method of processing frames. The multicast transmission method includes the steps of: (a) setting a multicast connection; and (b) transmitting multicast messages in a GEM mode, wherein said step (a) includes a first sub step (i), in which predetermined ONTs are registered to a multicast group by means of IGMP frames in the first step, and a second sub step (11), in which an OLT assigns a multicast port ID to the multicast group and the ONTs registered to the multicast group. In addition, step (b) includes a first substep (i), in which the OLT assigns a multicast port ID to a message transmitted from a router to the multicast group, and transmits the message, and a second sub-step (ii), in which an ONT, which belongs to the OLT, filters the message, to which the multicast port ID is assigned, by means of a port ID assigned to the ONT.

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Juhong, Wu et al.; “Application of IP Multicast in Remote Transmssion System of Heavy Date;” Computer Engineering, vol. 29, No. 5; Apr. 2003; 3 pgs.
“Top Level Specification of PTSP, TC and MAC Components;” Ing-Jyh Tsang et al.; GigaPON Access Network; XP002288126; Mar. 12, 2003; 38 pgs.

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