Abstract: NB-IoT (Narrow-Band Internet of Things) is based on cellular networks and plays an important role in the current development of the Internet of Things. The article first briefly introduces the concept of NB-IoT, and highlights the characteristics of NB-IoT by comparing with other IoT wireless mobile communitcation technologies. Based on the “cloud-pipe-end” structure of the IoT, the “business-cloud-pipe-end” structure of NB-IoT is proposed. Three applications including smart city, public industry, agriculture and environment are taken as examples to analyze the specific application of NB-IoT. And the paper explains the wide range of applications of NB-IoT. According to the structure of NB-IoT, the NB-IoT security protection framework can be divided into four levels: Terminal security, network security, cloud security and business security. Finally, this paper summarizes the problems faced inthe development of NB-IoT technology.

Key words: NB-IoT, wireless mobile communication technology, business-cloud-pipe-end, smart city, public industry, agriculture and environment, security

摘要： IoT是基于蜂窝网络的窄带物联网，在当前物联网的发展中承担着重要的角色.首先对NBIoT技术作出简单的介绍，通过对比其他物联网无线移动通信技术，突出NBIoT的特点，并在物联网“云管端”的体系架构基础上，提出NBIoT技术“业务云管端”的应用架构.然后以智慧城市、公共产业、农业与环境3个应用业务为例对NBIoT技术的具体应用作出分析，阐述NBIoT技术广泛的应用领域.并根据NBIoT的基本架构，将NBIoT安全防护框架分为终端安全、网络安全、云平台安全和业务安全4个层次进行研究.最后对NBIoT技术发展面临的问题作出总结.

关键词: NB-IoT, 无线移动通信技术, 业务云管端, 智慧城市, 公共产业, 农业与环境, 安全