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Modeling TCP behavior in a differentiated services network

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2 Author(s)
Ikjun Yeom ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA ; Reddy, A.L.N.

The differentiated services architecture has been proposed for providing different levels of services and has received wide attention. A packet in a diff-serv domain is classified into a class of service according to its contract profile and treated differently by its class. While many studies have addressed issues on the diff-serv architecture (e.g., dropper, marker, classifier and shaper), there have been few attempts to analytically understand a flow's behavior in a diff-serv network. We propose simple models of TCP behavior in a diff-serv network. Our models quantitatively characterize TCP throughput as functions of the contract rate, the packet-drop rate and the round-trip time in either two-drop precedence or three-drop precedence network. We also extend our models to aggregated flows. The models are validated through a number of simulations

Published in:

Networking, IEEE/ACM Transactions on  (Volume:9 ,  Issue: 1 )