Guest Editorial Recent Advances in Heterogeneous Cellular Networks, Part II

This special issue aimed to bring together research HetNet (Heterogeneous Cellular Network) articles from a wide range of perspectives in different industrial and academic communities. The goals are to advance the understanding of the challenges faced over the next decade, solidify accepted models and metrics, and catalog innovative approaches to design and deploy HetNets. We were delighted to receive a total of 110 submissions to the special issue, and accepted manuscripts have been selected after a rigorous review process. Due to the large volume of submissions, the accepted papers will be published in two back-to-back JSAC special issues. In this second issue, there are 18 accepted papers, which can be broadly categorized under four major research areas: 1) traffic analysis; 2) scheduling, energy efficiency, and cloud aspects; 3) device-to-device communication; and 4) analytically tractable models.