Internet-of-Things: Technology evolution and challenges

This paper briefly summarizes the technology evolution of Internet-of-Things (IoT) from RFID. The key differences between the internet and the Internet-of-Things have been addressed. Five key technologies for IoT have been summarized and the technical trends of IoT are introduced. The further development of IoT will be driven by the existing urgent demands, namely smart-manufacturing, smart-healthcare for elderly, intelligent transportation, smart city, safety monitoring of buildings and bridges as well as industrial factories.