Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2005-09-06
2005-09-06
Chin, Wellington (Department: 2664)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S362000, C370S364000
Reexamination Certificate
active
06940856
ABSTRACT:
In an NXN switch a plurality of buses interconnect the individual input modules to all of the output modules in a predetermined sequence. The input modules store the received cells and a unique ID. When selected the input module places a cell and its ID on selected ones of the buses along with a multicast vector which identities which of the output modules is to process the cell on a bus. The output modules examine the multicast vector and process the cell (table lookup) if selected In the multicast vector. If an output module is unable to process a required cell (successful table lockup) it sets a retry vector resident on the bus and the input module modifies the multicast vector to indicate only those output module(s) which failed to process a required cell. The cell, the ID and the modified multicast vector are placed on a bus in a subsequent selection of that input module.
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Chin Wellington
Cockburn Jocelyn G.
Fox Jamal A.
International Business Machines - Corporation
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