Abstract
The innovations of sixth generation wireless communication (6G) as
compared to fifth generation (5G) are considered in this paper based on
the analysis of related works. With the aim of improving multiple
communication targets in each service, five 6G core services are
identified for different target requirements. Two centricities and eight
key performance indices (KPIs) are detailed to describe these services,
and enabling technologies are discussed to satisfy the KPIs. A 6G
architecture is proposed as an integrated system of the enabling
technologies, and is then illustrated using four typical application
scenarios. Potential challenges for development of 6G technology is then
discussed and possible solutions are proposed. Finally, opportunities
for exploring 6G are analyzed in order to guide future research.