Paradigms, Frameworks and Prototypes Towards the Realization of the Internet of Things

The problem of integrating the ad hoc networks and especially the Wireless Sensor Networks (WSN) with the Internet has attracted significant research and implementation efforts so far. Admittedly, not all of them have been widely adopted and established as prevalent standards or solutions in this technical area. In this paper we survey the proposed interconnection models and the relevant architectures. We discern three different communication models, we describe some of the existing frameworks towards the development of Internet-based sensor applications and, finally, we present a number of prototypes that implement and use the above concepts. The analysis reveals the pros and cons of each technology and makes hints about the trends and the tracks that will lead to the problem's solution in the near future.