Bandwidth allocation with preemption

Amotz Bar-Noy, Ran Canetti, Shay Kutten, Yishay Mansour, Baruch Schieber

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


Bandwidth allocation is a fundamental problem in the design of networks where bandwidth has to be reserved for connections in advance. The problem is intensified when the overall requested bandwidth exceeds the capacity and not all requests can be served. Furthermore, acceptance/rejection decisions regarding connections have to be made online, without knowledge of future requests. We show that the ability to preempt (i.e., abort) connections while in service in order to schedule 'more valuable' connections substantially improves the throughput of some networks. We present bandwidth allocation strategies that use preemption and show that they achieve constant competitiveness with respect to the throughput, given that any single call requests at most a constant fraction of the bandwidth. Our results should be contrasted with recent works showing that nonpreemptive strategies have at most inverse logarithmic competitiveness.

Original languageEnglish (US)
Pages (from-to)1806-1828
Number of pages23
JournalSIAM Journal on Computing
Issue number5
StatePublished - 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Computer Science
  • General Mathematics


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