Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2004-11-30
2009-02-03
Duong, Frank (Department: 2616)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S432000
Reexamination Certificate
active
07486675
ABSTRACT:
Network-units (4) comprising multicast driver devices (3) handle multicast messages efficiently by providing the multicast driver devices (3) with memory nodes (1,2) arranged in rows and/or columns, with a memory node (1,2) comprising a memory element (31-33) for memorizing a state of the memory node (1,2). Large numbers of multicast cells/groups like multicast cells and/or multicast groups can be served advantageously. M×N memory nodes (1,2) are arranged in M rows and N columns, with a memory node (1,2) comprising an engagement line (11), an unavailability line (12) and an identification line (13) per row and a request line (21), an acknowledgement line (22) and a selection line (23) per column. A memory element (31,32) memorizes a state indicating a destination port being used for a multicast cell/group, and a further memory element (33) indicates a state requesting a generation of a multicast copy for a destination port, all according to a rule of exclusiveness.
REFERENCES:
patent: 5724351 (1998-03-01), Chao et al.
patent: 5844887 (1998-12-01), Oren et al.
patent: 6128292 (2000-10-01), Kim et al.
patent: 6483831 (2002-11-01), Petersen
ALCATEL
Duong Frank
Sughrue & Mion, PLLC
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