I welcome you to the first issue of the IEEE COMMUNICATIONS SURVEYS AND TUTORIALS in 2020. This issue includes 25 papers covering different aspects of communication networks. In particular, these articles survey and tutor various issues in “Wireless and Cellular Communications,” “5G Communications,” “Vehicular and Sensor Communications,” “IoT and M2M,” “SDN and NFV,” “Internet Technologies,” and “Network Security.” A brief account for each of these papers is given below.

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社论：2020 年第一季度 IEEE 通信调查和教程

欢迎您阅读 2020 年第一期 IEEE COMMUNICATIONS SURVEYS AND TUTORIALS。本期包括 25 篇涵盖通信网络不同方面的论文。特别是，这些文章调查和辅导了“无线和蜂窝通信”、“5G 通信”、“车辆和传感器通信”、“物联网和 M2M”、“SDN 和 NFV”、“互联网技术”和“网络安全。” 下面简要介绍了这些论文中的每一篇。