Adaptive web service composition insuring global QoS optimization

Web services composition consists of combining web services features in order to respond to complex requests. Giving the large and exponentially growing number of web services offering similar features, services selection should be QoS-driven. Besides, the composition should also support and adapt to dynamic changes occurring during the composite service execution. In this context, this paper proposes an architecture supporting dynamic composition and global QoS Optimization. It also proposes an Ant Colony Optimization based algorithm for the QoS aware service selection.