关键词: 第5代移动通信系统, 接入网, 核心网, 波束赋形, 网络架构

Abstract: With the continuous development of information technology, the key technology and system design of the fifth generation of mobile communications system (5G) has become a hotspot in both academia and industry. A complete overview of 5G design and standardization progress,including thekey performance index (KPI) of 5G was provided,the work plan of international standardization organization on 5G,and 5G design based on 3GPP R15. Specifically,the key technology of physical layer,the protocol stack and procedure of air interface,the radio access network architecture and interface design,the key technology and architecture of core network were introduced and analyzed. We try to provide a whole picture of 5G design,from radio access network to core network. Therefore, a clear understanding of the overall design ideas, solutions and features of 5G technology, as well as the 5G standardized contents can be achieved.

Key words: the fifth generation of mobile communications system, radio access network, core network, beamforming, network architecture