1G has enabled mobile calls, 2G has enabled SMS, digital voice and mobile Internet, 3G has brought picture-based mobile Internet and 4G has promoted mobile video. 5G is seen as the foundation of the Internet of things, the Internet of cars and other things in the future. At the same time, 5G popularization will make technologies including virtual reality and augmented reality mainstream. 4G was built for phones, not optimized for the Internet of things. 5G technology provides the Internet of things with enormous bandwidth. Compared with 4G, 5G networks can support 10 times more devices. It can be applied to intelligent sensors of automatic driving, ultra-hd video, virtual reality and Internet of everything.

5G network has three main characteristics: extremely high speed, extremely high capacity and extremely low delay. Compared with 4G network, the transmission rate is increased by 10-100 times, the peak transmission rate is up to 10Gbit/s, the end-to-end delay is up to ms level, the connected device density is increased by 10-100 times, the traffic density is increased by 1000 times, the spectrum efficiency is increased by 5-10 times, and the user experience can be guaranteed at a speed of 500km/h.

And 2 g, 3 g, 4 g for different from person to person communication, only 5 g in the design, consider the people and things, the content and the content of interconnection, the global telecommunication union accepted index of 5 g, in addition to the original base station peak rate requirements, puts forward eight indicators on 5 g: peak rate, rate of user experience, the base station capacity spectrum efficiency, flow space, mobile performance, network efficiency, connection density and time delay.

The biggest difference with 5G is that it will really help society build the "Internet of everything". Such as unmanned driving, cloud computing, wearable devices, smart home, telemedicine and other massive Internet of things, when 5G is mature enough, it can achieve the real sense of the Internet of things/things, people/things. With the help of 5G, disruptive applications such as new technological revolution artificial intelligence, new intelligent hardware platform VR, new travel technology unmanned driving, and new scenes of the Internet of everything can be spread out.