Standalone (SA) deployment and non-standalone (NSA) deployment are the key issues considered in the early stage of 5G network introduction.Firstly
the deployment architecture options in 3GPP standard were introduced and the key deployment architectures were analyzed and compared.Then two evolution routes of 5G network deployment were put forward.At last
the deployment mode and evolution strategy of 5G core network were given
which provided references for the deployment mode and evolution path selection of 5G network.
WANG Q Y , XIE P R , XIONG S K , et al . Key technology and standardization progress for 5G [J ] . Telecommunications Sci-ence , 2017 , 33 ( 11 ): 112 - 122 .