Method and system for network processor scheduling outputs using queueing

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United States of America Patent

PATENT NO 6952424
SERIAL NO

09548912

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Abstract

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A system and method of moving information units from a network processor toward a data transmission network in a prioritized sequence which accommodates several different levels of service. The present invention includes a method and system for scheduling the egress of processed information units (or frames) from a network processing unit according to stored priorities associated with the various sources of the information units. The priorities in the preferred embodiment include a low latency service, a minimum bandwidth, a weighted fair queueing and a system for preventing a user from continuing to exceed his service levels over an extended period. The present invention includes a weighted fair queueing system where the position of the next service in a best efforts system for using bandwidth which is not used by committed bandwidth is determined based on the length of the frame and the weight of the particular flow. A 'back pressure' system keeps a flow from being selected if its output cannot accept an additional frame because the current level of that port queue exceeds a threshold.

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Patent Owner(s)

Patent OwnerAddress
INTERNATIONAL BUSINESS MACHINES CORPORATIONNEW ORCHARD ROAD ARMONK NY 10504

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bass, Brian Mitchell Apex, NC 60 1632
Calvignac, Jean Louis Cary, NC 108 2409
Heddes, Marco C Raleigh, NC 78 1914
Siegel, Michael Steven Raleigh, NC 72 2278
Verplanken, Fabrice Jean La Gaude, FR 105 1906

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