Let’s talk about the four major features of 5G

From telegraphs, telephones to mobile phones, and from 1G to 4G, communication technology has brought endless convenience and welfare to mankind and society. Now we are ushering in the 5G era, but what exactly is 5G?

Is 5G just faster? Of course not. In summary, 5G has four important features: high speed, ubiquitous network, low power consumption, and low latency. Let's talk about these four features today.

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1. Let’s talk about speed first.

I once told a joke in the program "Three Bright Points": In the 2G era, what we watched was Sora Aoi.txt; in the 3G era, it was Sora Aoi.jpg; in the 4G era, it was Sora Aoi.avi; in the 5G era, what we see is Sora Aoi.

We can clearly feel that when we use 3G to download a picture, it takes half a day to download a 2M picture. With 4G, not only can it be downloaded in seconds, but there is also a big change: for example, when you open a video on WeChat, it will start playing automatically, while 3G will not play automatically. Why? It costs a lot of money to play it, and ordinary people don't want it. It doesn't matter with 4G, it can be played at will, so what changes will there be in the 5G era?

VR was once very popular, but why is it not popular? Because the experience of using VR now is very slow, the effect is very poor, and you will feel dizzy after watching it for a while. Because VR requires a speed of at least 157M, and the current 4G speed cannot reach that.

Once we have 5G, we can use VR very well, and then you will be able to see a real Sora Aoi.

2. Fast speed is easy for everyone to understand. Let’s talk about the second feature. What is ubiquitous network?

Ubiquitous Internet means that the Internet exists in every corner of social life. You may wonder, do we really need this? The answer is yes.

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For example, underground garages are needed. A smart car runs outside all day and needs to be charged at night. It has to park in the parking space in the underground garage and plug in the charger. If there is no network, how can it find its parking space and plug in the charger?

For example, most bathrooms are network blind spots. In the past, we thought that if the network in the bathroom was not good, it was not good. We would not die if we did not solve it. It was nothing more than watching a video in the bathroom not fast enough. But in the 5G era, the bathroom must have a very good network. Why? The reason is simple. Your toilet must be connected to the Internet.

What should the toilet of the future look like? When you go to the bathroom, it first identifies whether you are a man or a woman, which determines whether to open the toilet lid, one lid or two lids.

The most important thing is not this. After you go to the toilet, you will be given a routine urine test with 13 indicators. After the test, it is found that your uric acid pH value has been rising recently. Uric acid is too high and is about to reach the critical point. You are about to get gout. What should you do? The toilet will remind you not to drink beer or eat seafood, and recommend a health product to inhibit gout. If you find that there is a little blood in your urine recently, your kidneys may not be very good, and it will remind you what to pay attention to.

This is very important. Many of our diseases are fine if they are discovered early, but there will be big problems if they are discovered late. Why can't they be discovered early? Because you can't check your urine carefully after you urinate. It's useless to check it yourself because you don't know the content of its components. But if you do a urine routine test once a day, it will be amazing~

Some people also say that if we do a urine routine test once a day, then the hospital's urine routine test should be cancelled. Yes, the hospital can stop doing this. What the hospital needs to do is to analyze the data of various urine routine tests and long-term data directly, and then prescribe medicine and treat you.

3. Next, let’s talk about low power consumption.

We all wear smart watches, but it is painful to wear smart watches now because they have to be charged every day. We definitely hope that they can be charged once a month. How can we do that? We must achieve low power consumption.

For example, a belt should be connected to the Internet, and it can record my waist circumference, my physical activity, whether I have gained or lost weight recently. My glasses should also be connected to the Internet, and they can record my tear glands and many things I see. If all these things are smart and connected to the Internet, it will be troublesome: every day when I go home, I have to take off my belt to charge it, take off my leather shoes to charge it, and take off my glasses to charge it, then we don’t want to use them at all.

Therefore, the power consumption must be reduced, and the battery should be charged no more than once a month.

4. Finally, let’s talk about low latency, which is the most important feature of 5G.

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How is the sound of our conversation transmitted? When we speak, the air vibrates, and the sound is transmitted between two people. The transmission time is 140 milliseconds. 140 milliseconds is tolerable for humans, and we never feel that there is a big delay. But if you are controlling an unmanned aircraft or a car, and you give the car a signal to brake, the car still needs 140 milliseconds to respond, which means it has run 200 meters. If it is 20 milliseconds, it has run more than ten meters. This kind of thing is impossible for unmanned vehicles to become a reality.

The new World Telecommunication Union's vision for 5G is to achieve a latency of 1 millisecond or even less than 1 millisecond, a response that current networks and technologies cannot achieve.

One thing that shocked the world this year was that an Uber self-driving car in the United States hit and killed a pedestrian. This was caused by the failure to achieve low latency.

The whole braking process is like this: First, the radar sends a signal to the pedestrian, who reflects the signal back. After receiving the signal, the driverless car converts it into an electrical signal, which is stored in the central processing system. After storage, the signal is taken out for calculation. After the calculation, it is concluded that the brake should be applied, and then the signal is transmitted to the braking system...

In short, this system is very complicated. We have to find the simplest and fastest way in this system. It is very difficult to brake immediately when a problem is discovered.

Let's talk about missiles. What is considered accurate? In the past, if a missile missed by 500 meters, you might be hiding in a tunnel and it would not hit you. If it missed by 50 meters, it would be very accurate, but there are also problems. If it missed by 5 meters or 5 centimeters, it would be completely different and you could achieve a precise strike.

Therefore, solving the latency problem is the most core issue in the communication system.

In short, 5G is a revolution. It is driven by technology and extends from the connection between people to the Internet of Everything, from individuals and families to all areas of society, thus bringing revolutionary impacts to social economy and life.

Some people say that 4G is enough. IBM's Watson once said that the world only needs 5 computers. Bill Gates also said that 640K of memory is enough. For the technological and ecological revolution of 5G, it is obviously not a question of "is it enough?", but a question of "can we innovate more?"

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