Abstract
This paper defined a unified architecture of IoT system, on which IoT node model, virtual things, the basic service of things and overall hierarchical model of services had been described. IoT nodes must be connected directly to Internet and provide basic services of things in this architecture, and started from the base services which were compatible with Internet applications system of SOA, built the IoT application system with the middle layer of the Internet-based services and the base services of things, in order to implement a complete IoT system. this study also provides a practical application for monitoring water resources in the IoT way.
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