Heterogeneous Ultra Dense Networks: Part 2

Abstract

The eleven articles in this special section focus on heterogeneous ultra dense networks. With the continuous enrichment of mobile communication application scenarios in the future, the traditional macrocellular-based mobile communication network architecture will be challenged to meet the explosive growth in demand for communications services. As described in the Guest Editorial of the first part of this Feature Topic, the ultra-dense network (UDN) has become a promising technology to signifi cantly improve the network spectral efficiency and system performance. Because the massive number of small base stations have the advantages of low transmission power and flexible deployment, they help to effectively expand the coverage and throughput of the network. Hence, in heterogeneous UDN, the dense deployment of small base stations can signifi cantly improve the quality of the links and increase the network capacity. As the key technology of 5G and the advanced communication technology at the present stage, UDN has received worldwide attention and eff orts.