"""Agilos"": A Middleware Control Architecture for Application -Aware Quality of Service Adaptations"
Li, Baochun
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Permalink
https://hdl.handle.net/2142/81979
Description
Title
"""Agilos"": A Middleware Control Architecture for Application -Aware Quality of Service Adaptations"
Author(s)
Li, Baochun
Issue Date
2000
Doctoral Committee Chair(s)
Nahrstedt, Klara
Department of Study
Computer Science
Discipline
Computer Science
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Computer Science
Language
eng
Abstract
Third, in order to optimally design the reconfiguration rules in configurators so that the best possible application QoS is achieved, we designed mechanisms and protocols for the Quality of Service probing and profiling services, named QualProbes, for the discovery of relationships among QoS parameters and reconfiguration actions. Fourth, estimation errors and significant end-to-end delay may obstruct desired accurate adaptation measures. We devised an optimal state prediction approach to estimate current states based on available state observations. Finally, we present a gateway-centric approach that facilitates on-the-fly reconfiguration of client-server mappings. We have built a prototype of the Agilos architecture, and validated it with OmniTrack, a client-server based omni-directional visual tracking system. In this work, we show that the Agilos architecture effectively achieves the best possible performance with respect to the most critical QoS parameter, the tracking precision, while the adaptive actions are stable, flexible and configurable according to the needs of individual applications.
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