The definition of smart city by the International Electrotechnical Commission (IEC) is: a smart city is a new concept of urban development, a new method to promote the transformation of government functions, and to promote innovation in social management. The goal is to make infrastructure more intelligent, public services more convenient, and social The management is more refined, the ecological environment is more livable, and the industrial system is more optimized.
The comprehensive application of the Internet of Things in urban management is a smart city.
The construction of a smart city mainly includes the following parts: firstly, comprehensively obtain urban system data through sensors or information collection equipment; secondly, through the network to associate, integrate, process, and analyze urban data into information; thirdly, through full sharing, intelligent Mining turns information into knowledge; finally, combined with information technology, knowledge is applied to all walks of life to form wisdom.
The reference model of smart city construction includes 5 layers with dependencies and 3 support systems with constraints on construction.
1) Functional layer
(1) IoT Perception Layer: Provides intelligent perception capabilities for the urban environment, through various information collection equipment, various sensors, surveillance cameras, GPS terminals, etc. Security and other aspects of information collection, identification and detection.
(2) Communication network layer: Widely interconnected, using the Internet, telecommunication network, radio and television network and urban private network with optical fiber as the transmission medium as the backbone transmission network, with wireless p network (such as WiFi) and mobile 4G covering the whole city as the main transmission network The access network constitutes the network communication infrastructure.
(3) Computing and storage layer: including software resources, computing resources and storage resources, providing data storage and computing for smart cities and ensuring the relevant requirements of the upper layer for data aggregation.
(4) Data and service support layer: Using SOA (service-oriented architecture), cloud computing, big data and other technologies, through the integration of data and services, support and carry related applications in the smart application layer, and provide various applications required by the application. services and shared resources.
(5) Smart application layer: various smart applications and application integration based on industries or fields, such as smart transportation, smart housekeeping, smart leftover areas, smart communities, smart government affairs, smart tourism, smart environmental protection, etc. City managers, etc. provide overall informatization applications and services.
2) Support system
(1) Security assurance system: Build a unified security platform for smart city construction, and realize unified entry, unified authentication, unified authorization, and log recording services.
(2) Construction and operation management system: Provide an overall operation and maintenance management mechanism for the construction of smart cities to ensure the overall construction management and sustainable operation of smart cities.
(3) Standard specification system: The standard specification system is used to guide and support the overall planning and engineering construction of informatization users in cities across my country and smart application information systems in various industries. Provide unified specifications for urban construction, management and operation and maintenance to facilitate interconnection, sharing, interoperability and expansion.
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