What's the difference between a 5g network and a 4g network?

Abstract: What's the difference between 5g network and 4g network? As the next generation communication technology, 5G connects various devices with unprecedented scale, speed and complexity. Compared with 4G, it has two characteristics of higher speed and lower delay rate, and with the blessing of these two characteristics, 5G will also greatly improve social efficiency and bring more convenience to people's lives. 5g network is so much stronger than 4g! Get to know Bian Xiao quickly. The difference between 5g network and 4g network

1, the first is high speed.

According to the information of communication operators, it is estimated that it will take 30 seconds to download a movie of 1G in the 4G network environment. If a 5G network is used, the unit of calculation may not be in seconds.

Professionals interviewed by China media said that the speed of 5G is 100 times that of 4G; There are also foreign media reports that the speed of 5G will be tens of thousands of times that of 4 G, and watching videos and playing games with mobile phones will no longer be "stuck".

At present, the actual data is that the 3G pilot field test conducted by China Telecom in xiong'an new area at the end of last year can improve the peak experience of 4G users by about 20 times.

2. Another feature of 5G is its low delay.

In many applications, there will be a substantial breakthrough because of 5 G. From the current fiery autopilot, many teams told reporters that the test time will basically not exceed 60 km/h.

"Why? If the speed is too fast, the self-driving car may have' kissed' other cars from the time when the instruction is issued to the time when the car receives the instruction. " An autonomous driving team said.

But with 5G, these troubles have disappeared. Since the delay of the 5G network has also dropped from 30-50ms of 4G to 1ms, the response speed is faster and the driverless car will be safer.

3. "After the arrival of 5G, can my 4G mobile phone still be used?"

It must work. At present, although there are more and more users using 4G netizens, 4G, 3G and even 2G networks exist. Similarly, after the commercialization of 5G, the 4G network will not be shut down at once.

"That I still don't want to use. At first, it was estimated that 5G mobile phones were also very expensive. "

From the historical experience, expensive is certain, but without 5G, you will miss many beautiful things. Just like in the 4G era, new things such as mobile live broadcast, online car ride, and * * * enjoying bicycles were born and thrived, so in the 5G era, many things you can't imagine will also be born, which will affect the current business pattern and people's lives.

Technically, where is 5G better than 4G?

When it comes to the characteristics of 5G, it is inevitable that there will be a wave of popular science from technology.

Before talking about 5G, let's talk about 2G, 3G and 4G. For us ordinary users, the impression of these terms is limited to that 4G is faster than 3G, while 3G is faster than 2G.

Our communication mainly depends on electromagnetic waves, whose frequency resources are very limited. Different frequencies have different speeds. Its characteristic is that the greater the frequency, the greater the bandwidth, so the faster the speed. Our current network is in a lower frequency band, which has the advantages of good performance and good coverage, but the problem is that resources are precious. 5G uses a high frequency band, which can just make use of idle resources. With the development of 2G to 5G, the frequency is getting higher and higher, and the speed is getting faster and faster.

Not only in speed, but also in delay, number of connections and mobility, there is a big gap between 4G and 5G.

In terms of delay, the delay time of 5G is greatly reduced, which has a great impact on many real-time applications, such as games, video and data calls, autonomous driving and so on. The maximum number of connections per square kilometer of 5G is also 100 times that of 4G, and the maximum mobile speed supported is 1.5 times.

In addition, there is another change in 5G, which is the change of transmission path. In the past, when we made phone calls or sent photos, the signals were relayed through the base station, but after 5G, the transmission between devices can be directly carried out without going through the base station.

Actually reflected in the changes of life.

1, the network speed becomes faster.

This should be everyone's understanding of the deepest characteristics of 5 G. How fast can it be? For an intuitive example, if you download a high-definition movie with 5G, it will not exceed 1 second. Fast is fast. In terms of tariffs, some netizens once ridiculed that when you wake up in the 4G era, the house may be gone, but in the 5G era, you wake up and find yourself in debt.

I don't know what the final tariff will be for the time being, but I believe it will not be cheap at first.

2, mobile phone update iteration

Can you still see the "mobile phone"? The smart phone we use now may become an "antique" in the future. With the end of the 2G era, operators officially shut down the 2G network, and mobile phones that only support 2G will also become a permanent memory. Therefore, the arrival of 5G has certain requirements for equipment.

3. Wide application of cloud technology

For us, 4G may still mainly solve the problems of watching movies, chatting and playing games online, but 5G is more about solving data problems.

High speed is very important for cloud technology. In the future, data will be uploaded to the cloud, and our work, life and entertainment will be given to the cloud.

4. Development of the Internet of Things

Like cloud computing, the Internet of Things is also a big player in terms of speed and capacity. After the development of 5G, the terminal equipment of the Internet of Things will change accordingly, and smart cities, smart homes and logistics will become more intelligent. For example, our future logistics information may not be as simple as going to that city, but as detailed as going to which street.

5. The maturity of driverless technology.

Although unmanned driving is on the road now, the technology is still immature, which has a lot to do with the network. As we also said above, a major feature of 5G is low latency. This is crucial for autonomous driving. Imagine that once there is danger ahead, if the network environment fails to meet the requirements, the system will not be able to respond quickly, and the tragedy of car crash and death is inevitable.

6. Development of virtual reality

The concept of VR was very popular in the past two years, but with more and more people experiencing VR, the popularity gradually declined. The reason is that VR technology is obviously immature. After the experience, some VR helmets will bring people a sense of dizziness, and the more you play this kind of dizziness, the heavier it will be. In fact, because the speed of data transmission can't keep up with the reaction time of our brain and eyes, there is a time difference between them. Although it looks small, it can produce a huge reaction in our body.

Having said that, some people can't help wondering, since 5G has so many benefits, why didn't we use 5G before?

There is a truth in this world called "everything has advantages and disadvantages". Although the frequency band of 5G is fast, there are also many problems.

One of the most important points is that the penetration is not strong. Electromagnetic waves have one characteristic. The higher the frequency, the worse the diffraction ability, and the greater the attenuation loss in the propagation process, so the coverage ability is greatly reduced. This brings a problem. In the same area, 4G only needs 1 base station, while 5G needs multiple base stations, and the number of base stations determines the input cost. To put it bluntly, there is still no money.