Crossbar synchronization technique

Details Crossbar synchronization technique Crossbar synchronization technique

2007-03-20

2007-03-20

Duong, Frank (Department: 2616)

Multiplex communications

Pathfinding or routing

Through a circuit switch

C370S503000

Reexamination Certificate

active

10222538

ABSTRACT:
A technique synchronizes a crossbar switch fabric of a network switch having a plurality of modules configured to transmit and receive data at high speeds. The crossbar switch fabric resides on a switch module and operates on fixed-size cells received at its input ports from line card modules over high-speed serial communication paths of the switch. To eliminate resynchronization between the modules after each serial communications path traversal, each module is allowed to operate within its own clock domain, thereby forcing the entire resynchronization task upon a receive data path of the switch module. Although this results in resynchronization of a “large magnitude”, the task only needs to be performed once and entirely on the switch module.

REFERENCES:
patent: 6449283 (2002-09-01), Chao et al.
patent: 6725388 (2004-04-01), Susnow
patent: 6778548 (2004-08-01), Burton et al.

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