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Hidetoshi Tokuda CS740 Reading Assignment

Summary: Hidetoshi Tokuda
CS740 Reading Assignment
3 / 26 / 2007
Summary of "Supporting Real-Time Applications in
an Integrated Services Packet Network: Architecture and Mechanism"
This paper proposes a new architecture and mechanism of managing the traffic so that
the network could provide an acceptable level of throughput for real-time applications which is
delicate to delays and jitters. The key insight is that they separated the real-time applications
into to two types: rigid & intolerant applications which need guaranteed service versus adaptive
& tolerant applications which can use predicted service. And they provide a traffic
management mechanism which is a combination of WFQ with token-bucket (for guaranteed
service) and modified FIFO (for predicted and other). Packets will be classified into class
(flow) and processed in the appropriate level of service.
In their approach, classified packets will be put into the appropriate queues and
requires calculation of average delay or delay for each flow to allocate the bandwidth that
matches and balanced to the current state in the predicted service case. But actually, keeping
the states of flow and calculating delays might be a little expensive for a router with a heavy
load on it. Also, in this paper a lot of packet classification, queuing is discussed but the policy
might be able to include some perspective of routes. This mechanism's purpose is to provide a
QoS in end-to-end level, but since the current Internet has a very complicated relations and


Source: Akella, Aditya - Department of Computer Sciences, University of Wisconsin at Madison


Collections: Computer Technologies and Information Sciences