Dynamic message-path generation for improvised composition of networked appliances services

We propose a networked appliances services composition model based on a task graph. We also introduce a mechanism for dynamically generating data/event exchange paths (message-paths) among the distributed services. A home network is a heterogeneous and dynamic environment. It consists of various devices including networked appliances, sensors, and computers. This paper focuses on three solutions for achieving adaptability in composition of networked appliances services. First, the service model called Serdget increases service utilization by substitution. Second, we introduce an easy-to-manipulate and easy-to-program messaging mechanism based on data/event ports. Finally, we provide an XML-based task graph description (i.e. service composition) language called VNA markup language (VML) for achieving portability