Smart cities have become a global trend for cities

At present, large-scale urbanization has become the trend of urban development. How to ensure the safety of food, medicine and human beings in the process of large-scale urbanization so as to build a safe and effective monitoring network; and how to meet people's educational, health and medical needs Scientifically and effectively plan urban infrastructure; How to promote the adjustment of urban industrial structure, promote the progress of energy conservation and emission reduction; How to quickly deal with unexpected incidents in the cities, etc. These problems have become urgent in today's large-scale urbanization Problem to be solved. The traditional technology and management methods can no longer meet the requirements of the modern society. At this moment, the new generation of technologies and confidence technologies that are only available to us has come to our realization, giving us a new understanding of urban structure, urban functions and urban positioning. The concept of "smart city" came into being under such a background. Building a smart city has become an essential part of urban development.

First, the wisdom of urban construction

Smart city refers to the city to a deeper level of information technology development, the use of advanced information technology to build the city's infrastructure, so that city management becomes more simple and effective. It provides a good environment for people living in cities, people and things, people and the community to live in harmony. Let cities have the characteristics of intelligent coordination, resource sharing, interoperability and comprehensive perception. Achieve the city of intelligent services and management. In recent years, with the rise of new technologies such as mobile Internet, Internet of things, cloud computing and so on, the practical research of smart cities is also making continuous progress. How to use the technology of mobile internet, cloud computing, internet of things and so on to solve the problems in the current large-scale urbanization and comprehensively improve the level of people's livelihood, government affairs and industry has become an important issue in the development of modern cities.

Internet of Things technology plays an important role in modern information technology. It will have terminal facilities such as smart terminals for mobile terminals, RFIDs, sensors, etc., which are interconnected through short-range communications, long-distance wires or between wireless devices and devices. Satisfy smart city's intelligent management of urban resources. Use of the Internet to connect ubiquitous smart sensors in urban facilities effectively enables a full perception of the city and a convergence of the Internet of Things and the "digital city." Make intelligent decision-making support for the needs of education, urban services, public safety, ecological environment, government affairs, livelihood and so on, so that smart cities can truly become "intelligent."

In addition, smart cities also need the support of cloud computing technology, which can be regarded as the "brain" of a smart city. The so-called cloud computing based on the calculation of the Internet, so that smart city application system according to their own needs, from a large number of computer resources words to obtain appropriate software services, storage space and computing power to improve the system resources usage efficiency. So IOT technology and cloud computing technology are important components of smart city construction.

Second, based on cloud computing smart city architecture

Smart city is generated by the integration of IOT technology, cloud computing technology and digital city. The goal of smart city development is to form a systematic and huge Internet of Things that applies perceptual devices to every corner of the city, Of the computer to complete a large number of data integration and processing, and then smart city to the city's services and management to bring about tremendous changes, as shown in Figure 1, the smart city architecture can be divided into four parts, namely, wisdom Ying Zeng, application support Platform, network layer, perception layer. cnelcPage])

The perception layer collects information through facilities such as RFID, cameras, sensors and other modules, and transmits the information collected by these facilities to the data center through the network

Data center platform has strong computing power, storage capacity, decision-making ability, management capabilities, and includes a professional database covering all industries, to provide data and information support for a range of smart applications such as campus, environmental protection, transportation, government affairs. Sensor terminal will collect a large number of information transmission data center, data center through the integration of incoming information analysis, and then smart city applications. In the traditional urban architecture, its hardware server has been unable to meet the management and processing of large amounts of data, cloud computing is applied in the transport layer and application layer of the Internet of Things, cloud computing is a smart city service, a good solution Calculation and storage of large amounts of data. At the same time, to a certain extent, greatly improve the operation efficiency of smart city application system. The purpose of building a smart city is to realize the sharing and highly integration of large amounts of data and information. The characteristics of cloud computing are in good agreement with the smart city construction. Therefore, IOT technology and cloud computing technology based smart city architecture as shown in Figure 2 below.

The system is mainly composed of cloud security layer, smart city operation support system, infrastructure layer, cloud service platform, application layer and portal layer.

1. Cloud Security Layer The cloud security layer involves all aspects of a smart city to ensure that the application system in a smart city can operate normally.

2. Smart city operation support system The system is built for the new features of smart city applications to ensure the smart city application system running normally.

3. Infrastructure layer Smart city is the bottom of the infrastructure layer, the basic structure of cloud computing infrastructure layer, which includes two parts, one is the basic resources, and the other can only access, of which the basic resources are to establish various industry standards Also database, all smart city applications combined with their own needs to access, to a certain extent, improve the utilization of resources to achieve the level of resources, collaboration and sharing. Intelligent access includes basic communication network and IoT sensing device to ensure the access of smart city application system.

4 cloud service platform and application layer The smart city's middle layer is a cloud service platform. Mainly for smart city applications and set up, in this service platform not only to achieve the sharing and management of urban resources information, you can also release some smart city applications, in addition, relying on its strong ability to integrate information, but also for Users provide scientific and rational decision-making. Smart city application system is mainly manifested in three major areas, namely, smart industries, smart people's livelihood, smart government. Through intelligent, sophisticated smart city applications, to meet the various needs of the various areas of information technology.

5. The portal layer The portal layer is to show users, enterprises and governments the results of various smart city applications, and at the same time this layer also provides a platform for urban residents to experience the smart city application system.

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