Specifying Resource-Centric Services in Cyber Physical Systems
A service-oriented view of Cyber-Physical Systems (CPS) is a good platform for managing global supply chain management, service acquisition and service provision. A necessary condition for complex service delivery is that resources required for complex se
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Abstract A service-oriented view of Cyber-Physical Systems (CPS) is a good platform for managing global supply chain management, service acquisition and service provision. A necessary condition for complex service delivery is that resources required for complex services are of high quality and are available at service execution times. Therefore in a resource-centric service model, both resource quality and service quality using that resource are explicitly stated. In this paper a cascaded specification approach is discussed for describing resource types, services offered by resource, and a cyber configured service (CCS) that package physical services. Energy support from internal-combustion engine is regarded as a resource-centric complex service and discussed as a case study to illustrate our specifying and modeling approach. Keywords Cyber physical systems · Resource · Resource description · Resource management · Resource specifying · Service model
K. Wan (B) Department of Computer Science and Software Engineering, Xi’an Jiaotong-Liverpool University, Suzhou, China e-mail: [email protected] V. Alagar Department of Computer Science and Software Engineering, Concordia University, Montreal, Canada e-mail: [email protected] Y. Dong Research Assistant at Department of Computer Science and Software Engineering, Xi’an Jiaotong-Liverpool University, Suzhou, China e-mail: [email protected] G.-C. Yang et al. (eds.), Transactions on Engineering Technologies, Lecture Notes in Electrical Engineering 275, DOI: 10.1007/978-94-007-7684-5_7, © Springer Science+Business Media Dordrecht 2014
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1 Introduction Cyber-Physical Systems (CPS) [1] is a new research area with a grand vision. This paper is a contribution to formally specify resources and resource-centric services for CPS. The term resource is used in a generic sense to denote an entity that is relevant in either producing or consuming a service. In CPS, physical devices are resources, which are hence first class entities. Services may be either generated or consumed by physical devices, which might in turn be consumed by cyber computational resources, such as communication protocols. Software services may be generated by the computational resources that reside either in a static or dynamic host computer in CPS network and may be consumed by other physical devices to make changes in the environment. In general, a CPS resource might offer many services, a CPS service might require several resources, a CPS resource might use other resources, and a CPS (complex) service may be produced by combining several services and resources. Thus the service-oriented view of CPS is more complex than the service-oriented view required for traditional business applications, as discussed in SOC literature [2]. In [3] we proposed the three conceptual layers of CPS resources as physical, logical, and process through three-tiered approach, as illustrated in Fig. 1. In this paper, we continue our research and strive for notations that have semantic consisten
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