Fault-Resilient Pervasive Service Composition

The introduction of Service Oriented Architecture (SOA) provided a clean and expressive interface that allowed easy application composition and dynamic self-integration. However, pervasive computing systems built on top of a SOA still suffered from failures and dynamic changes in the environment. In this chapter, the authors presented a comprehensive solution combining the concept of virtual sensors, which improved the availability and quality of data, with WS-Pro/ASCT, a performance-driven pervasive service composition framework, to enhance adaptability and fault-resiliency. This integration created a systematic reliability control of end-to-end services by covering everything from software to hardware as well as from component to the entire system.