A Control-Based Middleware Framework for Quality of Service Adaptations

Overview

In heterogeneous environments with performance variations present, multiple applications compete and share a limited amount of system resources, and suffer from variations in resource availability. These complex applications are desired to adapt themselves and to adjust their resource demands dynamically. This paper presents a novel Middleware Control Framework to enhance the effectiveness of QoS adaptation decisions by dynamic control and reconfiguration of internal parameters and functionalities of a distributed multimedia application. The objective is to satisfy both system-wide properties (such as fairness among concurrent applications) and application-specific requirements (such as preserving the critical performance criteria).