  The commercial deployment of 5G communication networks makes the industry and
academia to seriously consider the possible solutions for the next generation.
Although the conventional approach indicates that 6G vision and requirements
can be figured out by simply multiplying a certain amount of magnitude on top
of the previous generations, we argue in this article that 1000 times price
reduction from the customer's view point is the key to success. Guided by this
vision, we categorize the current candidate technologies in a well organized
manner and select AI-assisted intelligent communications as an example to
elaborate the drive-force behind. Although it is impossible to identify every
detail of 6G during the current time frame, we believe this article will help
to eliminate the technical uncertainties and aggregate the efforts towards key
breakthrough innovations for 6G.

Signal Processing