Aggregate flow control: Improving assurances for differentiated services network

Biswajit Nandy, Jeremy Ethridge, Abderrahmane Lakas, Alan Chapman

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


The Differentiated Services Architecture is a simple, but novel, approach for providing service differentiation in an IP network. However, there are various issues to be addressed before any sophisticated end-to-end services can be offered. This work proposes an Aggregate Flow Control (AFC) technique with a Diffserv traffic conditioner to improve the bandwidth and delay assurance of differentiated services. A prototype has been developed to study the end-to-end behavior of customer aggregates. In particular, this new approach improves performance in the following manner: (1) fairness issues among aggregated customer traffic with different number of micro-flows in an aggregate, interaction of non-responsive traffic (UDP) and responsive traffic (TCP), and the effect of different packet sizes in aggregates; (2) improved transactions per second for short TCP flows; and (3) reduced inter-packet delay variation for streaming UDP traffic. Experiments are also performed in a topology with multiple congestion points to show an improved treatment of conformant aggregates, and the ability of AFC to handle multiple aggregates and differing target rates.

Original languageEnglish
Pages (from-to)1340-1349
Number of pages10
JournalProceedings - IEEE INFOCOM
Publication statusPublished - 2001
Externally publishedYes


  • Aggregate Flow Control
  • Congestion management
  • Diffserv
  • TCP-friendly

ASJC Scopus subject areas

  • General Computer Science
  • Electrical and Electronic Engineering


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