Service-Oriented IoT Resources Access and Provisioning Framework for IoT Context-Aware Environment

An important challenge for the development of the IoT is the growing number of connected devices. These devices and the information they generate are necessary resources in IoT solutions. However, the different interfaces and protocols of these devices and the data in different formats generated by devices make it difficult for us to manually connect these resources to the Internet of Things environment. In this paper, we propose a service-oriented IoT resources access and provisioning framework which can automatically adapt and access all resources and provide resources to the IoT context-aware environment in a service manner. Unified resource access system is responsible for connecting heterogeneous devices and adapting various interfaces and protocols dynamically using the protocol stack. The description model models the underlying resources and upper-level entities respectively, which realizes the sharing and reuse of resources. Based on the access system and description model, the service provider layer implements data interpretation that interprets the sensed data into contextual scene information, and resource mapping that maps resource operations to service interfaces which is opened to the IoTs Context-Aware Environment. Finally, we developed a framebased protocol stack system and used the system to complete an application in the Internet of things, which sufficiently proved the framework's ability to uniformly access of heterogeneous resources. In the mean-time, we test the performance of the protocol stack system and find that it can satisfy the requirement of resource consumption in the process of resource access in most application development.