A smart city is a new urban development model based on a combination of networks such as the Internet, the Internet of Things, telecommunications networks, radio and television networks, and wireless broadband networks, with the main characteristics of highly integrated smart technologies, high-end development of smart industries, and efficient and convenient smart services. Wisdom is another breakthrough in the world's scientific and technological revolution following industrialization, electrification, and informationization. To use of smart technology to build smart cities is the trend and characteristic of urban development in the world today.

Wisdom city construction need to make full use of the Internet of things, the Internet, cloud computing, emerging technologies, such as high performance computing, intelligent science and the need for network interconnection between sensors, equipment, systems, with many years in wisdom transportation, security, utility tunnel, and other wisdom city network applications in the field of experience, formed a complete network solutions, and the wisdom of the city to help partners to quickly build the wisdom of the safe, stable and reliable urban network links, to ensure the wisdom of the interconnection between the business.

The working principle is shown in the figure below: