Quality of service priority subclasses

Details Quality of service priority subclasses Quality of service priority subclasses

1996-04-26

1998-10-27

Hsu, Alpus H.

Multiplex communications

Data flow congestion prevention or control

Control of data admission to the network

370412, H04L 1256

Patent

active

058286535

ABSTRACT:
Prioritized subclasses of cells within at least one quality of service (QoS) level in an asynchronous transfer mode (ATM) network element are described. Corresponding QoS queues are provided with one or more thresholds for intelligent discard of incoming cells within a QoS, based upon cell priority, at the onset of queue congestion. Cells having a first priority within a QoS are discarded as a first queue threshold is achieved; cells having a higher priority are enqueued. A cell loss priority (CLP) bit is employed to provide a further degree of cell discard prioritization. Different traffic streams within a single queue have different priorities, enabling intelligent discard of lower priority traffic prior to complete queue congestion.

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