Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Patent
1995-05-23
1996-12-31
Olms, Douglas W.
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
370403, 370414, H04Q 1104, H04J 324
Patent
active
055901239
ABSTRACT:
A crossbar switching fabric for routing data packets in an ATM switch. A logic unit associated with a reservation ring in an ATM switch intercepts data exiting a selected evaluator of the reservation ring, and processes this data to set-up a crossbar switching fabric for routing data packets of the ATM switch. The set-up data may be passed to the crossbar switching fabric upon each clock cycle thereby not incurring any pipeline processing delays. Alternatively, the set-up data is accumulated and stored in the logic unit until the completion of an arbitration session, whereafter it is sent to the crossbar. In place of the logic unit a plurality of registers may be added to each of the evaluators of the reservation ring. The registers in turn interconnected to each other in a shift register arrangement to provide the set-up data to the crossbar fabric.
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IEEE Trans. on Parallel and Distributed Systems, vol. 4, No. 1, 1993, "Symmetric Crossbar Arbiters for VLSI Communication Switches", by Tamir, et al.
Bell Alan G.
Lyles Joseph B.
Olms Douglas W.
Phillips Matthew C.
Xerox Corporation
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