Data switching arbitration arrangements

Details Data switching arbitration arrangements Data switching arbitration arrangements

2006-05-23

2006-05-23

Chin, Wellington (Department: 2664)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S412000, C370S230000, C370S395720

Reexamination Certificate

active

07050448

ABSTRACT:
There is disclosed a masking unit (REQMSK) for use in a data packet switching system. The data switching system being of the type having a memoryless cross-back switch (SM) providing cyclic connections under the control of a switch arbiter (SCARB) between ingress routers (IR0, IR1, IR2and IR3) and egress routers (ER0, ER1, ER2and ER3). Each of the ingress routers (IR0–IR3) is provided with incoming packet buffering on a virtual output queue basis (VOQ0.0, VOQ0.1, VOQ0.2, and VOQ0.3for ingress router IR0). Each virtual output queue also produces a connection request signal REQ0.0to REQ3.3when the corresponding queue has a data packet in it. The masking unit REQMSK is arranged to randomly mask out correlated connection requests.

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