A middleware for context-aware application services in ubiquitous environments

Ubiquitous computing is the idea that invisible computation everywhere can enhance life in the real world. Applications and services in ubiquitous environments must be aware of their changing environments and adapt according to changing contexts. However, developing such systems providing context-aware applications or services is still a complex and time-consuming task. Therefore, we introduce architecture of context-aware service middleware (CASM) that provides a middleware-level support for building and rapid prototyping of context-aware services and describe interactions based on the architecture