In recent years, the concept of 5G network has been everywhere on the Internet. You can see 5G articles and relevant 5G videos whenever you open social media. Even many manufacturers have quarreled on the Internet for the future 5G products, and many 5G manufacturers have started to popularize 5G knowledge.
Since we ordinary people do not have the relevant channels to know 5G specifically, it is difficult to tell who is right. As a result, when we mention 5G in the end, we only think of 5G with greater network bandwidth and lower network delay. Some people may also think of artificial intelligence, unmanned driving, Internet of things and other application scenarios, but it is not clear what the dual-mode network is.
In the course of 2019, huawei was dominated by news about U.S. restrictions on the Internet. As soon as we start talking about 5G, there will be a lot of mentions of high-tech companies like huawei, zte and qualcomm.
According to qualcomm’s prediction, 5G can provide 22 million jobs for people, provide 12.3 trillion goods and services, and have a market of up to 3 trillion. What is the concept of this figure? That’s about the GDP of India, the world’s seventh-largest economy. It’s true that 5G has gained global recognition, and it could become a competitive point in the next era. But what’s different about 5G? Why do we need 5G when 4G networks are so mature? That may require a rethink.
So what era has 5G gone through?
The 1G network, which originated in 1980 and is also the founder of the mobile cellular network, can only be used for voice calls.
The 2G network, which began in 1990, allows for texting and low-speed transmissions in addition to voice calls.
3 g network from 2000, when the international telecommunication union (ITU) defines three mainstream wireless standard interface, respectively is w-cdma, CDMA2000 and td-scdma, the td-scdma is put forward by China for the first time and on this basis, and international cooperation, can be said to be a feat of China mobile, the standard specified for China in the field of communication to realize the breakthrough from 0 to 1. In addition, the App Store of iPhone, which is familiar to everyone, also started its journey in this period.
4 g network from 2010, the maximum transmission rate can reach 1 g, on the basis of such derived from a variety of different applications and business models, such as various types of short video, video, live long, games, social networking, electricity, mobile payment, etc., many Internet giant also begin to build your own Internet ecosystem, such as tencent and alibaba.
So what is a 5G network?
Unlike 3G and 4G networks, 5G has one and only one global communication standard, which is defined by many countries and companies around the world. In addition, 5G defines three features with the ability to support different application scenarios in the future, namely, high reliability and low latency of uRLLC, eMBB enhanced mobile bandwidth, and mMTC large-scale machine communication.
EMBB enhanced mobile bandwidth
This feature can be felt very much, for example, 1GB of video can be downloaded in a few seconds, for example, 5G mobile phone can download dozens of apps in an instant. And in high-density places, 5G can also provide better bandwidth for everyone.
MMTC high reliability low latency
Low latency is necessary for many application scenarios, especially for autonomous driving and intelligent healthcare. It is known that safety is the core of automatic driving. Although 95% safety can be achieved at the present stage, it cannot meet the requirements of commercialization. To achieve 99.999% safety factor and higher, the remaining 5% requires millisecond response delay to improve the overall safety. For example, when the driverless car is on the road, the system will monitor the road condition in real time. When the road surface is abnormal, the system needs to make emergency response in time, and the response delay is only a few milliseconds.
Another industry that has attracted more attention is intelligent medical industry. In the future, people need to control the movement of scalpel with very low time delay when conducting telemedicine. For example, the thickness of blood vessels is 0.2ms, and the scalpel will move around 0.5cm due to the delay in 4G network, which is very dangerous. The response delay of 5G network can be controlled at about 5ms, and the moving distance of the scalpel caused by the delay is about 0.025mm, greatly improving the safety of surgery.
MMTC large-scale machine communication
Young people who like to be at the forefront of The Times and technology enthusiasts have tried a variety of smart devices, such as smart home, smart wear, etc., which requires 5G network with high capacity. The core of 4G network is to connect people to each other. The number of connections in the world is 100 million. Each person may need a phone, computer or tablet to connect to the network.
However, with the development of the Internet of things (IoT), the future 5G network needs to connect different things and things, things and people. The world needs to carry up to a quadrillion connections.