Optimal partition of QoS requirements with discrete cost functions

Danny Raz, Yuval Shavitt

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

The future Internet is expected to support applications with quality of service (QoS) requirements. To this end, several mechanisms are suggested in the IETF; the most promising among them is DiffServ. An important problem in this framework is how to partition the QoS requirements of an application along a selected path. The problem which is, in general, NP-complete, was solved for continuous convex cost functions by Lorenz and Orda. This paper concentrates on discrete cost functions, which better model the existing and upcoming mechanisms in the Internet. We present efficient exact and approximated solutions for various conditions of the problem. We also show that although the more complex problem of QoS sensitive routing with discrete cost functions is hard, it has a fully polynomial approximation scheme.

Original languageEnglish
Pages (from-to)2593-2602
Number of pages10
JournalIEEE Journal on Selected Areas in Communications
Volume18
Issue number12
DOIs
StatePublished - Dec 2000

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