Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2006-06-13
2006-06-13
Kizou, Hassan (Department: 2662)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S412000
Reexamination Certificate
active
07061909
ABSTRACT:
A data switch is provided which routes fixed-size data packets from input ports to output ports, using shared memory which holds a copy of each packet in buffers. Output ports have a queue which contains pointers to buffers holding packets bound for that port. The number of shared memory buffers holding packets is compared to the number of buffer pointers in the output queues. In this way, a Multicast Index (MCI), a metric of the level of multicast traffic, is derived. The switch includes a Switch Core Adaptation Layer (SCAL) which has a multicast input queue. Because traffic is handled based on priority class P, a multicast threshold MCT(P), associated with the multicast input queue, is established per priority. While receiving traffic, the MCI is updated and, for each priority class in each SCAL, the MCI is compared to the MCT(P) to determine whether corresponding multicast traffic must be held.
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Blanc Alain
Brezzo Bernard
Gallezot Rene
Le Maut Franco
Roman Thierry
Chou Albert T.
Cockburn Joscelyn G.
International Business Machines - Corporation
Kizou Hassan
McConnell Daniel E.
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