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Endpoint admission control with delay variation measurements for QoS in IP networks

Published: 01 April 2002 Publication History

Abstract

In this paper we describe a novel Endpoint Admission Control scheme (EAC) for IP telephony. EAC mechanisms are driven by independent measurements taken by the edge nodes on a flow of packets injected in the network to probe the source to destination path. Our scheme is characterized by two fundamental features. First, it does not rely on any additional procedure in internal network routers other than the capability to apply different service priorities to probing and data packets. Second, the connection admission decision is based on the analysis of the probing flow delay variation statistics. Simulation results, which focus on a IP telephony scenario, show that, despite the lack of core routers cooperation, toll-quality performance figures (99th delay percentiles not greater than few ms per router) can be obtained even in severe overload conditions. Finally, a comparison with an EAC scheme driven by probe losses only, shows that the use of delay variation statistics as endpoint decision criterion is a key factor for EAC effectiveness.

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Published In

cover image ACM SIGCOMM Computer Communication Review
ACM SIGCOMM Computer Communication Review  Volume 32, Issue 2
April 2002
54 pages
ISSN:0146-4833
DOI:10.1145/568567
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Association for Computing Machinery

New York, NY, United States

Publication History

Published: 01 April 2002
Published in SIGCOMM-CCR Volume 32, Issue 2

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Author Tags

  1. IP
  2. admission control
  3. diffserv
  4. quality of service

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