| 摘要 |
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 memorising 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. MxN 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 ) memorises 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.
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