Qualified priority queue scheduler

Details Qualified priority queue scheduler Qualified priority queue scheduler

2005-08-23

2005-08-23

Vincent, David (Department: 2661)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C711S154000

Reexamination Certificate

active

06934294

ABSTRACT:
A queue scheduling method and apparatus for a queuing structure including a plurality of queues at different priorities and having different bandwidth privileges competing for the bandwidth of an output. The method selects a queue at the current priority, having data for release to the output and having available bandwidth to release data to the output. If there are a plurality of such queues, round-robin ordering determines which queue in the plurality is selected. The apparatus includes a plurality of bit masks representing the status in relation to a queue state variable of the different queues, which masks are combined in a bit-wise AND operation to determine which queues are selectable for releasing data to the output.

REFERENCES:
patent: 4864629 (1989-09-01), Deering
patent: 5627966 (1997-05-01), Hanko
patent: 6125182 (2000-09-01), Satterfield
patent: 6252608 (2001-06-01), Snyder et al.
patent: 6401117 (2002-06-01), Narad et al.

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