Improving the Safety and Security of Wide-Area Cyber-Physical Systems Through a Resource-Aware, Service-Oriented Development Methodology

This paper presents a service-oriented development methodology for wide-area cyber-physical systems (CPS) such as smart grid and vehicular networks. Unlike the traditional task-based development approach from the domains of automotive and avionics, the proposed service-oriented development methodology inherently enables disruption-free incremental system deployment and reconfiguration that are fundamental requirements for handling the "always-online" nature of emerging wide-area CPS application domains such as smart grid and vehicular networks. The proposed service-oriented CPS development methodology extends the traditional service-oriented computing (SOC) paradigm for handling hard real-time CPS aspects by introducing resource-aware service deployment and quality-of-service (QoS)-aware service operation phases. The proposed CPS development methodology also supports a streamlined formal interface between the traditional computer-aided feedback controller design environments and SOC paradigm. The paper utilizes a simulation-based smart grid case study to illustrate the advantages of the proposed methodology for developing wide-area cyber-physical systems with improved safety and security characteristics. The paper also identifies a set of technological requirements for the proposed service-oriented CPS development methodology that should guide future research in this area.