There are three main scenarios of 5G:eMBB (Enhanced Mobile Broadband), URLLC (Low Delay High Reliability), and mMTC (Massive Large Connection).Specifically, the eMBB scenario is mainly a rate increase. In the future, the 5G standard requires that a single 5G base station can support at least 20Gbps downlink speed and 10Gbps uplink speed, and it is mainly used for large-flow applications such as 4K/8K ultra-high definition video and VR/AR. URLLC requires that the delay of 5G must be less than 1ms in order to deal with low latency applications such as unmanned and smart factories. The mMTC scenario is a massive connection that corresponds to a large number of applications such as the Internet of Things.