ATM switching element and method having independently accessible

Details ATM switching element and method having independently accessible ATM switching element and method having independently accessible

1994-04-28

1996-12-10

Olms, Douglas W.

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370352, 370412, 370419, H04L 1254

Patent

active

055838618

ABSTRACT:
An ATM switching system architecture of a switch fabric-type is built of, a plurality of ATM switch element circuits and routing table circuits for each physical connection to/from the switch fabric. A shared pool of memory is employed to eliminate the need to provide memory at every crosspoint. Each routing table maintains a marked interrupt linked list for storing information about which ones of its virtual channels are experiencing congestion. This linked list is available to a processor in the external workstation to alert the processor when a congestion condition exists in one of the virtual channels. The switch element circuit typically has up to eight 4-bit-wide nibble inputs and eight 4-bit-wide nibble outputs and is capable of connecting cells received at any of its inputs to any of its outputs, based on the information in a routing tag uniquely associated with each cell.

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