System and method for synchronizing switch fabric backplane...

Multiplex communications – Pathfinding or routing – Through a circuit switch

Reexamination Certificate

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Details

C370S387000, C370S412000, C370S429000

Reexamination Certificate

active

10395367

ABSTRACT:
A system and method are provided for resynchronizing backplane link management credit counters in a packet communications switch fabric. The method comprises: at an input port card ingress port, accepting information packets including cells and cell headers with destination information; modifying the destination information in the received cell headers; routing information packets between the input port card and output port cards on backplane data links through an intervening crossbar; at the input port card, maintaining a credit counter for each output port card channel; decrementing the counter in response to transmitting cells from the input port card; generating credits in response to transmitting cells from an output port card channel; sending the generated credits to increment the counter, using the modified destination information; and, using the generated credit flow to resynchronize the credit counter.

REFERENCES:
patent: 5168570 (1992-12-01), Eckert et al.
patent: 5572522 (1996-11-01), Calamvokis et al.
patent: 6591286 (2003-07-01), Lu
patent: 7085846 (2006-08-01), Jenne et al.
patent: 2002/0012344 (2002-01-01), Johnson et al.
patent: 2002/0039351 (2002-04-01), Wang et al.

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