Cell-free radio access network(CF-RAN),as a novel network architecture,plays a significant supportive role for the typical applica-tion scenarios and key technical indicators of 6G.Firstly,the evolution of multi-antenna technology as well as network architecture is intro-duced,including cell-free massive MIMO(CF-mMIMO)technology and the CF-RAN architecture based on this technology.Next,the sup-port of CF-mMIMO technology for typical application scenarios of 6G,including cell-free system based immersive communication,massive communication,hyper reliable and low-latency communication,integrated sensing and communication,ubiquitous connectivity,as well as the support of cell-free system based on integrated artificial intelligence and communication,is introduced,and some solution ideas and new research directions are proposed.Finally,a novel architecture for CF-RAN and the support of this architecture for some of the key tech-nical indicators of 6G are introduced.
cell-free massive MIMOcell-free radio access network6G
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