However, 5G communication is not limited to interpersonal communication. It also introduces services such as the Internet of Things, industrial automation, and unmanned driving. A delay of 140ms is acceptable, but industrial automation will be very difficult if it is used in autonomous driving. Small deviations can lead to collisions and accidents, and if there are hundreds of drones flying in formation, then information needs to be relayed to the drones in flight.

Among the three scenarios defined by 3GPP, 5G requires not only high speed, but also higher requirements such as low latency, although high speed is still an indispensable part of it. From 1G to 4G, the core of mobile communication is human-to-human communication, of which personal communication is its core business. However, 5G communication is not limited to interpersonal communication. It also introduces services such as the Internet of Things, industrial automation, and unmanned driving. Communication has changed from human-to-human communication to human-to-human communication to machine-to-machine communication.

5G basic features

(1) High speed

When the network speed increases, the user experience and feel greatly improves. Only when the network is not restricted by VR/Ultra HD services can services that require high network speed be widely promoted and used, which means that users can download HD movies or support VR videos every second.

(2) Network coverage

With the development of enterprises, the BC558CZL1 network service needs to be all-encompassing and ubiquitous. Only then can we support richer businesses and use them for complex scenarios. The ubiquitous network has a wide coverage, wide depth and far-reaching impact.

Extensiveness requires our broad participation in all aspects of social life. For example, 5G coverage can be used for multiple sensors such as environment, air quality, terrain changes, and earthquake monitoring.

Deep learning is all about obtaining higher-quality deep coverage in the presence of a deployed network. With the 5G era, toilets and underground parking spaces with poor network quality in the past can be widely covered by good 5G networks.

In a sense, the ubiquitous network is more important than the high-speed network, but building a network with very small coverage and very fast speed cannot guarantee the 5G service and experience. The ubiquitous network is the basic guarantee for the 5G experience.

(3) Low energy consumption

To support large-scale IoT applications, 5G must meet power consumption requirements. In recent years, wearable products have developed to a certain extent, but they have also encountered some bottlenecks, and lack of experience is the bottleneck restricting development. All IoT products now require communication and energy. Although communication is possible in various ways, the energy supply can only be provided by batteries. Because the communication process consumes a lot of energy, it is difficult for IoT products to be widely accepted by users. If the power consumption can be reduced, the user experience will be greatly improved and the rapid popularization of IoT products will be promoted.

(4) Low delay

A new scenario for 5G is unmanned, highly reliable industrial automation connectivity. A delay of 140ms is acceptable, but industrial automation will be very difficult if it is used in autonomous driving. 5G requires a minimum latency of 1 millisecond or less.

The drone needs the central control center to be connected to the car, and the car should also be connected to it. When running at high speed, the brake needs to immediately send information to the car to respond. In about 100 milliseconds, the car will rush out tens of meters away, which requires In the shortest time, information is provided for the car, the brakes and the car control.

This is even more serious for drones. Small deviations can lead to collisions and accidents, and if there are hundreds of drones flying in formation, then information needs to be relayed to the drones in flight. At the same time, if the operation of the manipulator is very delicate, in order to ensure high-quality and high-precision work, it also requires little delay and the most timely response. In traditional interpersonal or even machine-to-machine communication, because people's responses are very slow and the machines are so efficient and delicate, these characteristics are not so demanding for traditional communication. Whether it is drones, unmanned vehicles or industrial automation, they are all running at high speed, and it is also necessary to ensure timely information transmission and timely and high-speed response, which imposes very high latency requirements on us.

(5) All aspects are connected with each other

The limitations of ordinary communication terminals are very large. In the era of landlines, the telephone was defined as a crowd. In the era of mobile phones, the number of terminals has proliferated, and mobile phones are defined in terms of personal applications. Terminals in the 5G era cannot be artificially defined, because each person can have several, and each family can also have several.

(6) Safe reconstruction

What the network needs to solve is that information speed, barrier-free transmission, freedom, openness, and sharing are the basic spirit of the Internet, and the intelligent Internet built on 5G. The intelligent Internet should not only realize information transmission, but also establish a new social life mechanism and new system. The basic spirit of intelligent Internet is safety, management, efficiency and convenience. To build a 5G network, security issues need to be addressed from the bottom up. On the basis of building a network, a security mechanism should be added to encrypt information, and no special security measures should be taken for the network.

Three major application scenarios of 5G

There are three main 5G use cases:

First, mobile broadband has been enhanced, and its peak speed will exceed 4G.

Second, a large amount of machine communication will realize the whole process from consumption to production, covering the whole scene from people to things, that is, "Internet of Everything".

Third, ultra-reliable and low-latency communication, the communication response speed is reduced to the millisecond level. Self-driving cars, for example, will react faster than humans when they detect an obstacle, which could propel the self-driving car from the lab to the road.

5g is coming. Although there are still some urgent problems to be solved in 5g technology and application, the Ministry of Industry and Information Technology has issued licenses for the use of medium and low frequency test frequencies of the 5g system to the three major operators, China Telecom, China Mobile and China Unicom. In 2020, 5g will enter the trial commercial stage, and 5g will appear strongly.