Back pressure access control system for a shared buffer with all

Details Back pressure access control system for a shared buffer with all Back pressure access control system for a shared buffer with all

1996-06-07

1998-11-17

Dung, Dinh C.

Multiplex communications

Wide area network

Packet switching

39520065, 370412, 370413, 370429, 370462, G06F 1314, H04L 1254

Patent

active

058389229

ABSTRACT:
An improved access control system for a memory system in which memory locations can be allocated to virtual output queues dedicated to output ports from the system. The virtual queues can be used to handle data of different priorities. Thresholds are defined for the occupancy of the overall memory and of each virtual queue. The access control system regulates the acceptance of data stored in input adapters by determining whether a back pressure situation exists for the data's target output adapter for the class of traffic to which the data belongs. A single-bit access-controlling back pressure signal is generated as a function of the occupancy level of either the overall memory or of the virtual queue defined for the target output adapter.

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