5G is the 5th generation mobile networks or 5th generation wireless systems, the goal of 5G is high data speed, latency reducing, energy savings, lower costs, the capacity of the system improving, and large-scale device connecting.

 

 

The ISO 3GPP defines three scenarios for 5G. Among them, eMBB refers to large-traffic mobile broadband services such as 3D/ ultra HD video. mMTC refers to the large-scale IoT services, and URLLC refers to the unmanned-driving, industrial automation and other businesses requiring low latency and high-reliable connection.

 

 

It can be seen from the three scenarios definition of 3GPP that 5G does not only have high-speed but also meet the higher requirements such as short latency. From 1G to 4G, the core of mobile communication is interpersonal communication, and personal communication is the core business of mobile communication. But 5G communication is not only the communication between people, but also the communication between people and things, and even the communication between machines.