On call admission control for IP telephony in best effort networks

  • Authors:
  • IstváN Szabó

  • Affiliations:
  • Ericsson Research, Traffic Analysis and Network Performance Lab, P.O. Box 107, H-1300 Budapest 3, Hungary

  • Venue:
  • Computer Communications
  • Year:
  • 2003

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Abstract

This paper contributes to answer the fundamental question of what sort of QoS guarantee can be provided by a core-stateless QoS provisioning architecture, and it also investigates the effect of flows subjected to the admission control on legacy TCP traffic. The approach relies on an enhanced version of passive end-to-end measurement-based call admission control in IP telephony gateways which eliminates the signalling load and the associated flow states in the core routers. The admission control method collects packet loss and delay statistics experienced by ongoing sessions. Detailed characterisation of the solution is provided using simulation.