TECHNICAL AND RESEARCH CHALLENGES
We believe that the ultra-dense deployment of millimetre-wave (mmW) SCs in conjunction with massive multiple-input multiple-output (MIMO) antennas in the BEs is the most representative combination of 5G and beyond 5G (B5G) technologies and use case scenarios, as it demonstrates the three most promising ways (i.e., SE enhancement by massive MIMO, SB expansion at mmW bands (30-300GHz), and dense SC deployment) to increase capacity in the BEs, which include the “future smart offices” and “dense urban” use cases identified by 5G-PPP where very high data rate services such as virtual reality (VR) and ultra-high definition video take place.
Combining the three disruptive key enabling technologies for 5G/B5G7, the dense massive MIMO mmW SC deployment in the BEs presents a number of research challenges in massive MIMO antenna design, channel modelling and measurement, and ultra-dense mmW SC deployment in 3D BEs.
Develop and test mmW MIMO and massive MIMO antennas.
Characterize and model MIMO radio propagation at mmW bands for typical BEs (offices, homes, stations, etc.).
Characterize and model the effect of human body on MIMO radio propagation at mmW bands.
Theoretically analyze and optimize massive MIMO mmW SC performance in the BEs.
Jointly optimize the planning/deployment of massive MIMO mmW SC networks and their operating environments.
Develop methods to retrofit existing buildings and to design new buildings for efficient high-capacity wireless communications in the BEs.