QoS-UniFrame: A Petri Net-based Modeling Approach to Assure QoS Requirements of Distributed Real-time and Embedded Systems
Bryant, Barrett R.
Gray, Jeffrey G.
Raje, Rajeev R.
Olson, Andrew M.
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Assuring quality of service (QoS) requirements is critical when assembling a distributed real-time and embedded (DRE) system from a repository of existing components. This paper presents a two-level approach for assuring satisfaction of QoS requirements in the context of a reduced design space for DRE systems. A dynamic and parallel approach is introduced to prune off the infeasible design spaces at the first level. Evolutionary algorithms cooperating with a domain-specific scripting language then discard less probable design spaces using statistics. These techniques fulfill the collective objectives of pruning and assuring the design space at system assembly time. The result may lead to lessen the overhead of validation of QoS requirements at runtime, and reduce the development and integration cost of DRE systems.
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