摘要
The year of 2019 is the first deployment year of the fifth generation(5G)mobile communications.As we are writing the editorial for this special issue,a list of countries such as South Korea,the United States,China,Switzerland,the United Kingdom,and Spain have launched commercial 5G services for the general public,while this list is growing quickly and is envisioned to become much longer in the near future.For the past months,5G has been continuously a hot buzzword in the news,attracting a huge focus from the whole society.
