Complex Event Processing in IoT Middleware

In recent years, Internet of Things has been attracting enormous attention not only from the research community but also from the industry sectors. However, the development of the software for Internet of Things has faced many problems, in particular, lacking the concept of complex event processing makes it hard to analyze data derived from the transducers. To solve this problem, we propose a complex event processing system which can read data from sensors, transform them to atomic events, put events into complex events processing engine, and output the complex events predefined. We developed the complex event process engine: user can define the complex event pattern, transducer data collected from the gateway will be transformed to events and last the tree-based complex event processing engine will find out the complex events. Finally, we present the scenario verifications and performance evaluations.