Service-Oriented Middleware for Heterogeneous Environment in Internet of Things

A great number of sensor technologies are applied in the Internet of Things (loT) currently and more are emerging, which makes the IoT a heterogeneous network. This paper discusses the convergence and integration problem in IoT. A Service-Oriented Middleware for Heterogeneous Environment (SOMHE) in loT is proposed. The purpose of the middleware is to shield the difference between protocols in the sensor layers such as Radio Frequency Identification (RFID) and Zig-Bee by defining the data conversion and mapping model. A Web service interface is supplied by this middleware, thus the complexity of high level application development can be reduced greatly. The feasibility and reliability of this rniddleware is verified by a demonstration system.