Critical communications and public safety networks, part 2: technical issues, security, and applications [Guest Editorial]

As we mentioned in the Guest Editorial of Part 1 of this Feature Topic, which was published in March 2016, due to a high number of high quality submissions, we divided the accepted papers into two parts. While the articles in Part 1 focused on general topics such as overview, spectrum policies, and economics, the articles of Part 2 in this issue of the magazine focus on more technical issues and solutions.