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Soft Real-Time Guarantee for Control Applications Using Both Measurement and Analytical Techniques
Baek-Young Choi, Sejun Song
Pages - 66 - 84     |    Revised - 30-10-2009     |    Published - 30-11-2009
Volume - 1   Issue - 1    |    Publication Date - November 2009  Table of Contents
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KEYWORDS
IEEE 802.11, DCF, service time statistics
ABSTRACT
In this paper, we present a probabilistic admission control algorithm over switched Ethernet to support soft real-time control applications with heterogeneous periodic flows. Our approach is purely end host based, and it enables real-time application-to-application QoS management over switched Ethernet without sophisticated packet scheduling or resource reservation mechanisms in Ethernet switches or middleware on end hosts. In designing the probabilistic admission control algorithm, we employ both measurement and analytical techniques. In particular, we provide a new and efficient method to identify and estimate the queueing delay probability inside Ethernet switches for heterogeneous periodic flows with variable message size and period. We implement the probabilistic admission control algorithm on the Windows operating system, and validated its efficacy through extensive experiments.
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Dr. Baek-Young Choi
University of Missouri, Kansas City - United States of America
choiby@umkc.edu
Mr. Sejun Song
- United States of America