QoS-Aware Complex Event Service Composition and Optimization Using Genetic Algorithms

The proliferation of sensor devices and services along with the advances in event processing brings many new opportunities as well as challenges. It is now possible to provide, analyze and react upon real- time, complex events about physical or social environments. When exist- ing event services do not provide such complex events directly, an event service composition maybe required. However, it is difficult to determine which compositions best suit usersâ quality-of-service requirements. In this paper, we address this issue by first providing a quality-of-service aggregation schema for event service compositions and then developing a genetic algorithm to efficiently create optimal compositions.