R&D of technology for high reliability management in advanced 5G network to meet the various requirements of different communication services

We have undertaken an R&D project in the "advanced 5G" era that aims at accommodating various types of communication involving current and emerging services with different data flow-level quality requirements. In this paper, the objectives and the technologies of the project are presented. We propose an architecture based on a virtualized radio access network (vRAN) that enables adaptive resource control of radio, computation and transport links, and RAN function placement in accordance with spatially changing communication demands. The topics under study that are essential for realizing the advanced 5G network are as follows: (a) blockage prediction, new radio access technologies (RATs) and their implementations with software-defined radio (SDR) for nano-area using the millimeter wave band, (b) adaptive interference and resource control, integration of radio and optical resource control, highly efficient optical transport link control, adaptive RAN function replacement, and service estimation per data flow for adaptive RAN. These research topics are essential to the realization of the advanced 5G network and will become the entrance to the Beyond5G/6G system.