Congestion control and its stability in networks with delay sensitive traffic

Ying Li, Antonis Papachristodoulou, Mung Chiang, A. Robert Calderbank

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


We consider congestion control in a network with delay sensitive/ insensitive traffic, modelled by adding explicit delay terms to the utility function measuring user's happiness on the Quality of Service (QoS). A new Network Utility Maximization (NUM) problem is formulated and solved in a decentralized way via appropriate algorithms implemented at the users (primal) and/or links (dual). For the dual algorithm, delay-independent and delay-dependent stability conditions are derived when propagation delays are taken into account. A system with voice and data traffic is considered as example and the properties of the congestion control algorithm are assessed.

Original languageEnglish (US)
Pages (from-to)20-32
Number of pages13
JournalComputer Networks
Issue number1
StatePublished - Jan 7 2011

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications


  • Congestion control
  • Optimization
  • Quality of service
  • Stability


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