5G Data Speed

Firstly we provide a picture to show speed comparing for 2G, 3G, 4G and 5G.

5G speed comparable to cheetah.
In fact, according to theoretical data, the transmission rate of 5G can reach 1GB/s, which is more than ten times faster than the current 4G. This means that the use of 5G technology to download 1GB HD movies will only take 10 seconds to download!

So, what changes can 5G make from the technology, making it “quality” to leap 4G speed? In addition to the faster speed, what is the improvement of 5G compared to 4G?

More than 4G, 5G exceeds 1G

Then I will show you the secret of 5G hidden in 4G than "1G".

Millimeter wave is the key to speed

We all know that the signals we use now are transmitting and receiving electromagnetic waves. However, since the frequency of electromagnetic waves is limited, it uses electromagnetic waves to work differently without interfering with each other. Therefore, the electromagnetic waves of Global Consulting Co., Ltd. are evenly divided into different uses, the frequency is taken as an example, the low frequency is applied to long-distance navigation, and the Yu Chao frequency is applied. Waveguide communication.

5G and 4G image contrast

However, it should be noted that millimeter waves can bring greater transmission speeds, but millimeter waves also have fatal drawbacks - millimeter waves attenuate greatly in air and have weaker diffraction capabilities. In short, it is very difficult to achieve a signal through a wall with millimeter waves.

In order to solve this problem, it is necessary to use micro base station technology.

Micro base station user equalization signal acquisition

As mentioned above, due to the poor penetration and attenuation of 5G millimeter waves, it is very weak in the air. If you still use 5G in the past, the "Acer Base Station" used during 3G 4G will provide enough protection signal, which can be slightly away from the user. .

In response to this difficulty, 5G began to use a new base station, a micro base station. As the name implies, the base station made by the micro base station is small enough.

5G millimeter waves make the antenna to a millimeter level.

Large-scale MIMO increases bandwidth capacity by dozens of times.

In the 5G era, "mm" antennas have a big advantage, that is, put more antennas in a small base station.

This is the use of MIMO technology, the full name is multi-input multi-output, meaning "MIMO", it is the base station antenna is getting bigger and bigger, and the ability to accept mobile phones become stronger, from multi-antenna transmission, receiving antenna receiving objects.

5G has become an enhanced version of large-scale (large-scale) MIMO technology because it can be placed in more antennas. Although MIMO technology has been used in the 4G era, 4G antennas are mainly used in the 4G era.

Most of the four antennas and eight antennas are used.

In the age of 5G, when the frequency of 30GHz base stations can simultaneously use 256 antennas to send and receive signals at the same time, and 5G can be increased by tens of thousands or even greater, mobile network capacity.

Signals like flashlights "precision strike" users Although both the signal and antenna problems have been solved, 5G has a problem that bothers us, which is that when we can't radiate radiation signals like 4G, the coverage is very wide, but the utilization rate is very low.

"Precision strikes" can only be used for those in need, saving resources. In layman's terms, 4G is like an electric lamp.

When the lights are turned on, no matter where a place does not need light, it will cover this beam of "4G" light, to a certain extent will cause a waste of resources.

By 5G, to address the waste of this resource, it began using beam forming techniques. What is beam formation?

Take a look at Wikipedia's explanation: Beam formation (beam formation) is also known as beam formation and spatial filtering, and is a signal processing technology that uses sensor arrays to directly send and receive signals. Beam formation technology makes the signal get a certain perspective and constructive interference by adjusting the phase parameters of the basic cell array, and the signal interference at another point.

Beam formation can be used both for signal transmitters and for signal receivers. Simply put, 5G turns 4G lights into flashlights.

If a black house uses a 5mm flashlight, it will not illuminate the whole house, but will seek a specific and desired direction.

D2D technology enables point-to-point communication Another major aspect is the implementation of 5G D2D communication based on cellular networks, also known as proximity services.

Through this technology, user data can be transmitted directly between two terminals without the need to transmit the base station.

Using D2D technology, a stone can save a lot of air resources and reduce the pressure of the base station.

However, you do not think that this can escape the operator's "magic claws", without the cost of transportation, because the total signal control and resource allocation or through the base station to control, so we still have to pay the operator. Generally speaking, although 5G 1G is more than 4G, but 1G content and progress is too much.

Whether it's bandwidth or base stations, 5G has a qualitative leap forward from 4G.

Although our 5G is a little distant from the stage of our daily life, it is now like the silence of the eve of a storm, and once 5G strikes, driverless, these things are closely related to our daily lives, and the common 5G technology products will subvert our daily lives. The most important thing, of course, is to speed up the network.