S-PDH: A CPS Service Contract Framework for Composition

Abstract

Cyber-Physical Systems (CPSs) are complex systems in which physical processes are tightly interacting with networked computing components. Some pilot researches suggest that Service-Oriented Architecture (SOA) by promising to guide the development of CPSs, but most of them neglect continuous physical behaviors for coinciding with traditional SOA. Consequently, developed CPS services cannot properly support the tight interaction between physical processes and computing. In this paper, we propose a novel framework S-PDH, in which a CPS service is characterized by a three-level of service contracts, namely, the physical property contract, the dynamic physical behavior contract, and the hybrid system behavior contract. Based on the framework, we study CPS service composition. This study introduces a novel SOA solution to CPS development, and promotes service computing to a new frontier.