Fifth generation (5G) wireless communication networks are being deployed worldwide and promise mass connectivity, ultra-reliability, and guaranteed low latency.
It sounds great for 2020 but people of 2030 are likely to want that, plus enhanced spectral/energy/cost efficiency, better intelligence level, and security - all over the world.
For that, they will need 6G air interface and transmission technologies and novel network architecture, such as waveform design, multiple access, channel coding schemes, multi-antenna technologies, network slicing, cell-free architecture, and cloud/fog/edge computing.