A per-flow based node architecture for integrated services packet networks

Dapeng Wu, Yiwei Thomas Hou, Bo Li, H. Jonathan Chao

Research output: Contribution to journalArticlepeer-review


As the Internet transforms from the traditional best-effort service network into QoS-capable multi-service network, it is essential to have new architectural design and appropriate traffic control algorithms in place. This paper presents a network node architecture and several traffic management mechanisms that are capable of achieving QoS provisioning for the guaranteed service (GS), the controlled-load (CL) service, and the best-effort (BE) service for future integrated services networks. A key feature of our architecture is that it resolves the out-of-sequence problem associated with the traditional design. We also propose two novel packet discarding mechanisms called selective pushout (SP) and selective pushout plus (SP+). Simulation results show that, once admitted into the network, our architecture and traffic management algorithms provide, under all conditions, hard performance guarantees to GS flows and consistent (or soft) performance guarantees to CL flows, respectively; minimal negative impact to in-profile GS, CL and BE traffic should there be any out-of-profile behavior from some CL flows.

Original languageEnglish (US)
Pages (from-to)135-160
Number of pages26
JournalTelecommunication Systems
Issue number1-2
StatePublished - 2001


  • Best-effort (BE) service
  • Call admission control (CAC)
  • Controlled-load (CL) service
  • Deficit round robin (DRR)
  • Guaranteed service (GS)
  • Integrated services (intServ) networks
  • Per-flow queueing
  • Shaped virtual clock (SVC)
  • Weighted round robin (WRR)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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