With the continuous expansion of urban population density and the rapid development of technology, our cities are becoming more and more intelligent , and the development of technology has significantly improved the lives of citizens. As we all know, the concept of " smart city " has existed for more than ten years, but recently, this phrase has officially become part of the modern dictionary. Although my country is not the first country to implement the construction of smart cities, the construction speed and effectiveness are undoubtedly the most significant. At present, almost all cities in the country have clearly proposed or are building smart cities. So what are the indispensable key technologies in the construction of smart cities?

    5G

    According to the technological development trend, around 2020, the application of the fifth-generation mobile communication technology (5G) will mature. With the advent of the era of 5G, high-capacity, low-latency transmission network will become a reality, mankind will enter all interconnected Things era, construction of smart city will be entering a new phase.

    5G provides solutions for the power grid, energy, transportation, security and other aspects of smart cities , and brings many social and economic benefits. 5G is considered to be the beginning of the Internet of Everything. The fifth-generation communication technology will not only bring an increase in network speed (eMBB), but also a reliable low-latency mass Internet of Things.

    The 5G smart city trend report from Accenture introduces smart city solutions based on fifth-generation communication technology from the perspective of economic benefits and application scale, including smart grids, smart transportation, and smart security .

    artificial intelligence

    "Artificial intelligence" has long been written into the "13th Five-Year Plan" outline. In the future, China will focus on breakthroughs in emerging fields of artificial intelligence technology and key technologies such as big data and cloud computing . This means that the research and development and application of artificial intelligence has become a new generation of technological revolution. The vane of industrial change and industrial change is also a key area to promote the construction of new smart cities.

    There are signs that artificial intelligence is beginning to penetrate into many sub-sectors of smart cities. Take smart government affairs as an example. According to reports, Diwei Video has developed a "social service management information platform" based on big data, AI, information security and mobile Internet technology. The platform can realize the sharing and coordination of urban data resources, and establish a new model of "Internet + government services" with information support, grid management and diversified services, turning "people running errands" into "data running errands."

    Big Data

    In the process of large-scale data flow in the smart city system, large-scale data needs to be preprocessed due to factors such as transmission efficiency, data quality, and security. Big data processing technology often needs to be combined with parallel distributed technology based on cloud computing, which is also a technical solution commonly used in the international industry.

    大数据分析与挖掘技术为智慧城市治理提供了强大的决策支持能力。相比于大数据融合和处理技术，大数据分析与挖掘技术更为复杂，是国际学术界和产业界面临的极具挑战性的技术难题。

    物联网

    物联网在智慧城市应用建设中，其扮演的是神经系统的角色，物联网通过它的传感器全方位的感知着城市信息；通过云化的大数据物联网云平台对感知的数据进行分析处理；基于分析处理的成果，支持各种各样的城市应用服务，为生活在城市中的人们提供智慧，贴心的服务，使其生活健康，便捷，城市变得平安，生态，宜居。

    为推动物联网技术的快速发展，工信部明确提出“要积极推进云计算和物联网发展，推进物联网感知设施规划布局，发展物联网开环应用”。“十三五”期间国家工信部将重点深化物联网在智慧城市等重点领域的应用，建立城市级物联网接入管理与数据汇聚平台，推动感知设备统一接入，集中管理和数据共享利用。国家对于物联网产业的支持，为众多物联网企业创造了良好的投资环境。

    云计算

    云计算作为一种计算模式，其重要特征就是资源整合，能够提供更强大的应用支撑能力，进一步推动区域信息化建设发展，为区域社会和经济更快更好地发展提供有力保障。

    智慧城市是以多应用、多行业、复杂系统组成的综合体。多个应用系统之间存在信息共享、交互的需求。各不同的应用系统需要共同抽取数据综合计算和呈现综合结果。如此众多繁复的系统需要多个强大的信息处理中心进行各种信息的处理。云计算的出现可以有效实现平台层的统一和高效能、大规模基础软硬件管理、业务/资源调度管理、安全控制管理以及节能降耗管理。

    总结：随着智慧城市发展进程推进，各项科学技术的“戏码”逐渐增多。在基于多项资源急需高度整合背景之下，技术已经是是智慧城市的核心资产。资产利用的深度与广度，