PAAS: A Protocol-based Approach to Adaptive Service Composition

For the development of network applications across multiple organizations, Service composition has been widely accepted as a promising technique. However, the atomic services are generally dynamic and distributed over the Internet, how to guarantee the adaptiablity capability in such open environment has become an important issue. In this paper, we address this problem by proposing a novel approach-PAAS (Protocol-based Approach for Adaptive Service Composition). We firstly design a protocol based system architecture supporting adaptive service composition. Then, we propose adaptive mechanisms based on the service and protocol optimization. Furthermore, we design adaptive service composition algorithm base on policies and protocols to deal with the variety of service resources and requirements. Finally we implement the PAAS approach and evaluate the proposed mechanism.