초록 ▼

A high speed collision N×M tri-state crossbar switch having M collision busses uses contention detection at the destination. In the event of a collision of messages, remedial action can be taken such as rerouting colliding messages over an alternate path provided by a second interconnection network

A high speed collision N×M tri-state crossbar switch having M collision busses uses contention detection at the destination. In the event of a collision of messages, remedial action can be taken such as rerouting colliding messages over an alternate path provided by a second interconnection network with contention resolution capability. Collision detection codes are transmitted prior to the transmission of messages to each input port. The tri-state output buses are monitored for the collison detection codes to detect an error. In order to prevent damage to driver transistors connected to the tri-state buses when a contention occurs, current limiting is provided to limit the current through the driver transistors to a predetermined level.

대표청구항 ▼

A collision crossbar switch comprising: an array of NXM cross-points Cij, said array having N input ports and M output ports, said output ports being connected to corresponding output buses and each of said input ports being selectively connectable to any one of said output buses via said output por

A collision crossbar switch comprising: an array of NXM cross-points Cij, said array having N input ports and M output ports, said output ports being connected to corresponding output buses and each of said input ports being selectively connectable to any one of said output buses via said output ports; current detecting and limiting means for connecting said output ports to said buses for limiting current through said cross-points when a contention occurs as the result of more than one of said input ports being simultaneously connected to any one of said output buses; and collision detecting means connected to each of said output buses for detecting a contention on a bus and initiating a remedial action in the event a contention is detected.