The Research Based Context Aware On Complex Event Processing Method For Internet Of Things

With the development of RFID and sensor network technology,the Internet of thing(IOT)has changed from the concrete concepts into practical application.In recent years,the application of IOT is becoming more and more widely.IOT is widely used in the monitoring and control of the critical infrastructure,defense weapon system,environment monitoring,smart home and life support systems,health care,aerospace and space,smart highways,and many other fields.The influence of IOT will go well beyond the IT revolution in the 20th century.In the IOT application,a key problem to be solved is information processing in the part of IOT middleware.A IOT system may contain interconnected equipment,and these devices produce a large number of signals.In a large-scale Internet system,the data sources of each are not identical,such as the obtained data from the RFID reader and temperature.This information is often different with change of context.How to describe the context sensitive information and respond in a timely manner according to the variation of the context urgently need to be solved.In order to solve the problem of complex event processing above,this paper proposes a context model based on fuzzy ontology and context reasoning based on DS evidence theory.Based this,the paper advances the context sensitive complex event processing method for the IOT.The main work of this paper includes the following:First,to process context sensitive information in the application of IOT,this paper implements a fuzzy ontology based context model,using Fuzzy OWL2 language to describe different kinds of context information produced by different event source.According to this model,this paper implements the context reasoning algorithm based on DS evidence theory.This algorithm extends the DS evidence theory to support the fuzzy sets,and extends the Dempster rule to process evidence fusion step by step and generates high context.Second,for IOT distributed applied feature,this paper proposes handling system facing IOT context sensitive complex things.We introduce the architecture about the system and introduce its specific module,then achieves a query rewriting based sensitive context complex processing.This method analyses the inquired sentence and decomposes it to evidence set.And then executing the complex event processing algorithm with the DS Theory based dividing strategy on the distributed nodes.