Topic based IoT data storage framework for heterogeneous sensor data

Massive volume and heterogeneous data are the challenges in IoT data storage. A properly designed IoT middleware is required to handle the issues. This paper presents a framework consists of Internet Gateway Device (IGD) function, a Web service, NoSQL database, and IoT Application. The framework efficiently handles the structured and unstructured of sensors data. To verify the framework, we evaluated it using functional and non-functional testing. From the functional testing, this framework can deliver and store data with heterogeneous data and volume. From the non-functional testing, this framework can receive 443 data per second from an IGD, can deliver 173 data per second to IoT Apps, and response times are acceptable which is under 1 seconds.