THz Communications for Mobile Heterogeneous Networks

The nine articles in this special section focus on mobile 5G heterogeneous mobile communication. It is widely agreed that B5G network should achieve greater system capacity (> 1000 times) in terms of data rate (terabits per second) and user density (the Internet of Things and Nano-Things). Also, it is generally accepted that there are three major ways to obtain several orders of increase in throughput gain, those being extreme densification of infrastructure, large quantities of new bandwidth, and a large number of antennas, allowing a throughput gain in the spatial dimension. These processes are complementary in many respects. Among others, in the search for more bandwidth beyond microwave and millimeter-wave (mmWave) systems, we are moving toward higher frequencies, especially in the promising terahertz (THz) frequency range. THz-band communication is envisioned as a key wireless technology to satisfy real-time traffic demand for mobile heterogeneous network (MHN) systems by diminishing the spectrum scarcity and capacity limitations of current wireless systems.