Editorial: Second Quarter 2019 IEEE Communications Surveys and Tutorials

Iwelcome you to the second issue of the IEEE Communications Surveys and Tutorials in 2019. This issue includes 35 papers covering different aspects of communication networks. In particular, these articles survey and tutor various issues in “Wireless and Cellular Communications,” “Vehicular Communications,” “Optical Communications,” “Network Virtualization,” “Internet of Things,” “Network Security,” and “Internet Technologies.” A brief account for each of these papers is given below.