A Context-Aware IoT Middleware for Management of Conflicts Using a Priority Scheme Based on Diagram of Situation State Transition

Abstract

Context-aware service is an extremely important research issue for users to collaborate with multiple smart objects embedded with various sensors in a local ubiquitous computing environment. And it is showing more important position in Internet of Things (shortly IoT) environment, when considering more complex situations happening in different locations. There is a need for IoT middleware to well organize the situations, e.g., creation and deletion of a situation, state transmission of the situation, in order to effectively provide services adaptive to various situations in IoT environment. Meanwhile conflict requests for situation-aware services are really hard to be solved, since many situations happen in the same time period need common resources for the services. In order to tackle the problem, we first propose an IoT middleware based on diagram of situation state transition (DSST), to specify and manage states of a situation. And then a priority scheme based on DSST for resolving conflicts is also presented by considering different states of situations. Experiment results demonstrate the feasibility of proposed method and the performance of situation-aware services based on the conflict resolution scheme.