Performance analysis of QoS mechanisms in IP networks

Dix Jia*, Eryk Dutkiewicz, Joe F. Chicharo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Integrated services IP networks are expected to provide a variety of services with differentiated QoS. This requires the implementation of mechanisms that can discriminate service classes in terms of QoS. The IETF has recently proposed a Differentiated Services (Diffserv) framework for provision of QoS. In this paper we analyze performance of two Diffserv mechanisms: Threshold Dropping and Priority Scheduling in terms of packet loss and mean packet delay. A comparison of the two mechanisms is carried out with the requirement that both mechanisms provide the same level of packet loss for the preferred flow. This comparison extends the results reported in the literature for these two mechanisms. In particular, in this paper we determine the impact of buffer threshold and buffer size on packet loss and mean packet delay in these mechanisms.

Original languageEnglish
Pages (from-to)359-363
Number of pages5
JournalIEEE Symposium on Computers and Communications - Proceedings
Publication statusPublished - 2000
Externally publishedYes


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