What are the three major advantages of 5g?

The three major advantages are: 1. High speed; 5G speed can reach up to 100 times that of 4G, achieving a peak speed of 10Gb/second. 2. Low latency; 5G’s air interface latency can be as low as 1 millisecond, which is only one-tenth of 4G. 3. Large connections; 5G can have 1 million connections per square kilometer, and the user capacity can be greatly increased compared to 4G.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

4G changes life, and 5G changes society. 5G, an interconnected society is about to become a reality. What is 5G?

It is the next generation (fifth generation) of mobile communications, which can provide faster upload and download speeds, wider coverage, and more and more stable connections.

5G is the main direction of the development of new generation mobile communication technology and an important part of the future new generation of information infrastructure. Compared with 4G, 5G has the technical characteristics of "ultra-high speed, ultra-low latency, and ultra-large connection". It will not only further enhance the user's network experience, bring faster transmission speed to mobile terminals, but also meet the requirements of the future Internet of Everything. application requirements, giving everything the ability to connect online.

At the end of 2018, the 5G frequency allocation of the three major domestic operators was finally settled. China Telecom and China Unicom each obtained 100M frequency in the 3.5GHz (gigahertz) band; China Mobile obtained a total of 260M frequency in the 2.6GHz and 4.9GHz frequency bands. Depending on the frequency license obtained, the three major operators can conduct 5G trials nationwide. It is almost certain that 2019 will be China’s “first year of 5G”.

Why do we need 5G?

The world is transitioning to mobile, and we are consuming more data every year, especially as video and music streaming become more and more popular. Frequency bands are becoming increasingly congested, causing service disruptions, especially when many people in the same area are trying to access online mobile services at the same time. From mobile phones to device sensors, from cameras to smart street lights, 5G is even better at handling a large number of devices.

What are the advantages and characteristics of 5G?

Compared with 4G, 5G has the characteristics of "higher network speed, low latency, high reliability, low power and massive connections".

In terms of ultra-high speed, 5G speed can reach up to 100 times that of 4G, achieving a peak speed of 10Gb/sec. You can use your mobile phone to watch 4K and 8K high-definition videos smoothly and quickly. Play 360-degree panoramic VR games and more.

In terms of ultra-low latency, the air interface latency of 5G can be as low as 1 millisecond, which is only equivalent to one-tenth of 4G and is much higher than the human body’s stress response. It is widely used in the field of automatic control.

In terms of ultra-large connections, 5G can have 1 million connections per square kilometer. Compared with 4G, the user capacity can be greatly increased. In addition to the connection of mobile phone terminals, it can also be widely applied to the Internet of Things.

5G application scenarios

In the minds of ordinary users, 5G may only mean “higher network speed.” But in fact, in addition to "mobile broadband enhancement" (ultra-high speed), 5G application scenarios also include "low-power massive connections" and "low latency and high reliability."

"Mobile broadband enhancement" can be further subdivided into two scenarios: "wide-area continuous coverage" and "high-capacity hotspot". The characteristics of the former are reflected in the breadth of coverage, with the goal of ensuring user mobility and business continuity, and providing users with high-speed business experience anytime and anywhere. The latter reflects "quality". In large gathering scenarios such as sports venues or concerts, it provides users with extremely high data transmission rates to meet extremely high traffic density requirements. In layman's terms, you can access the Internet anywhere. At the same time, not only can I access the Internet, it is also very fast and has high fidelity.

"Low-power massive connection" is mainly aimed at application scenarios targeting sensing and data collection such as smart cities and environmental monitoring. It has the characteristics of small data packets, low power consumption, and massive connections. Not only does it have the ability to support over 100 billion connections and meet the connection density indicator of 1 million/square kilometer, it can also ensure ultra-low power consumption and ultra-low cost of the terminal. It is precisely because of the existence of this scene that the process of the Internet of Things will be accelerated again, and the so-called "Internet of Everything" will eventually become a reality. The phrase that is often mentioned recently, "4G changes life, 5G changes society" comes from this.

"Low latency and high reliability" is mainly aimed at the special application needs of vertical industries such as Internet of Vehicles and industrial control. This type of application has extremely high requirements on latency and reliability, and needs to provide users with millisecond-level end-to-end latency and close to 100% service reliability. Specifically, in this scenario, 5G can achieve a delay of less than 10 milliseconds, which also means that automatically controlled braking is almost the same as human braking reaction time. In addition, 5G can enable computing at the edge of the base station, which also means that autonomous driving data can be processed on the network closest to the car, instead of uploading it to a relatively distant computer room in the neighborhood. This will also shorten the reaction time of autonomous driving.

The above three application scenarios have different corresponding 5G network designs. Through the splitting of BBU side functions, the sinking of part of the core network, and the "slicing" method, network resources are split and refined, thereby achieving flexible response to scenario requirements. In other words, there is no all-purpose network that can meet the demands of 1, 2, or 3 different scenarios with the same structure. In terms of implementation, 5G logically divides the physical network into N logical networks, and different logical networks serve different scenarios, which is like achieving the effect of a "Swiss Army Knife" multi-functional network.

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