Method and system for providing differentiated service on a...

Details Method and system for providing differentiated service on a... Method and system for providing differentiated service on a...

2006-04-04

2006-04-04

Pham, Brenda (Department: 2664)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S474000

Reexamination Certificate

active

07023856

ABSTRACT:
Different levels of service are provided to different types of traffic within a single virtual circuit (VC) by converting the traffic from fixed-length cells to variable-length packets, classifying the packets based on information in the packet headers, associating the packets with a VC, and then implementing class-specific enqueuing and dequeuing of the classified packets on a per-VC basis. Classified packets are dequeued from VC-specific and class-specific queues into VC-specific segmentation and re-assembly (SAR) queues according to an algorithm that is a function of traffic class. The dequeuing algorithm determines the level of service that is provided to the different classes of traffic within each VC. Packets are dequeued from the VC-specific SAR queues and converted back to fixed-length cells according to an algorithm that arbitrates among multiple VC-specific SAR queues. The technique for managing traffic can be carried out within an Ethernet switch/router that includes input and output ATM interfaces.

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