And this also makes the presidents of other communications industries around the world, such as Nojia, Ellison, Draft, and Sco......

The presidents of companies including Corning, Prysmian, Furukawa, Sumitomo and other companies in the optical fiber and cable communication equipment industry all have very ugly faces.

As for why the CEOs of the giants in the optical fiber and cable industry have ugly faces, the reason is that they, as professionals, naturally know that they want to rely on 4G mobile communication technology to achieve such a high network speed.

It is not enough to rely on 4G mobile communication technology alone, and this 4G mobile communication technology is only facing the terminal market of the market.

It is only equivalent to a person's hands and feet, and it is a person's body that determines whether a person's hands and feet are strong or not.

Otherwise, no matter how thick your hands and feet are, and your body is skinny, the weak shortcomings of your body will limit the strength of your arms.

At this time, through the test, Sugon Technology actually mastered not only the hands and feet of the 4G mobile communication technology terminal, but also the actual research and development of the body, that is, the Internet communication technology of ultra-high-speed optical fiber and cable.

And considering that this time not only 4G mobile communication technology will be released, but 5G mobile communication technology will be released at the same time, in order to realize the potential of 5G mobile communication technology.

Next, you can imagine what kind of horror the Internet communication technology of Dawning Technology's optical fiber and cable has reached!

Thinking of this, the presidents of the global optical fiber and cable Internet communication industry felt a chill behind them, and they felt that the sky was about to fall!

In this regard, Lin Chen at this time ignored how sad the presidents of other optical fiber and cable Internet communication fields or mobile communications fields in the world were.

After he finished introducing the functions and performance of 4G mobile communication technology, Lin Chen showed a mysterious smile and said:

"Well, the purpose of the research and development of 4G mobile communication technology is only to supplement the shortcomings of 5G mobile communication technology after all.

In the future, if the construction cost of our 5G mobile communication technology can be greatly reduced, or the next generation of 6G mobile communication technology will be greatly developed, then 4G mobile communication technology will eventually be eliminated.

Next, let's enter the introduction of the main course, after all, compared with 5G mobile communication technology, 4G mobile communication technology is only a baby-level technology after all.

The birth of 4G mobile communication technology is not enough to change the world, only 5G mobile communication technology can truly change the world! ”

Hearing Lin Chen's words, people were stunned at first, and subconsciously felt that Lin Chen was a little exaggerated, and he actually admired 5G mobile communication technology so much.

And it is not an exaggeration to call 5G mobile communication technology a change in the world?

After all, no matter how strong the 5G mobile communication technology is, isn't it just a mobile communication technology, and no matter how high his network speed is, he can still fly into the sky?

Facing the audience and reporters who showed disbelief, Lin Chen just smiled, and did not laugh at their short-sightedness.

After all, 5G mobile communication technology seems to have only been upgraded for a generation on the surface, and it should not be able to receive such an honor.

But who would have thought that the network speed improved by 5G would be exaggerated, and finally reach the point where many fantasy-level black technology technologies can be truly implemented?

So Lin Chen waved his hand lightly, and the projection screen behind him changed instantly, and the structure diagram of 5G mobile communication technology appeared on the screen in an instant.

This structural diagram is mainly a dense photo of micro base stations, and then these micro base stations are arranged in train stations, parks, and squares.

At the same time, Lin Chen's words also came out:

"I said before that the construction cost of 5G mobile communication technology is relatively high, and the reason is the same as you can see.

Its biggest feature is that it needs to be calculated according to the real environment, and then the installation of the micro base station equipment is carried out by the staff.

Compared with 4G mobile communication technology, which only needs to build a large communication tower to cover a large area, how can the construction cost of 5G not be high. ”

When Lin Chen finished speaking, the projection screen behind him also changed in an instant, turning into a picture of the Sub-6GHz (centimeter wave) frequency band.

"As shown in the figure, our Sugon 5G mobile communication technology uses the sub-6GHz frequency band in the centimeter wave range.

The wavelength range of this frequency band is between 450MHz and 6GHz, which belongs to the middle and low frequency band, and is also the golden frequency band of 5G networks. ”

When he said this, Lin Chen paused slightly, and then continued:

"Seeing this, many people in the communications industry or those who understand cutting-edge technologies will wonder why we don't use higher frequency bands for millimeter waves, but choose centimeter waves.

The reason is that the millimeter wave speed is fast, but we have to consider whether it is really practical, whether the construction cost is acceptable, and many other practical considerations.

Moreover, one of the biggest drawbacks of millimeter wave is that its communication distance is ultra-short, the construction cost is ultra-high, and the number of micro base stations is more than 5 times that of centimeter wave, and the electricity cost is naturally higher.

And most seriously, millimeter wave penetration is very bad, and 5G phones with millimeter wave technology can block the signal by almost anything, including phone booths, glass, trees, and rain.

It can be said that as long as there is an obscuration between the base station and the mobile phone, the 5G network may fall back to the 4G state!

You can imagine how bad you are when you are playing a game with high bandwidth requirements and suddenly you can't play or a super clear video suddenly interrupts and stutters......

In addition, the biggest thing about 5G mobile communication technology is that it can be applied to industry, applied to autonomous cars, if the rain blocks the 5G network on a rainy day, what should the self-driving car do?

So we use the Sub-6GHz (centimeter wave) band, which he calls the golden band of 5G for a reason.

First of all, it has strong penetration, longer transmission bands, more stable connections, fewer micro base stations to be invested, and lower electricity maintenance costs.

It can be said that our choice of Sub-6GHz (centimeter wave) frequency band is the choice of the times and an inevitable choice! ”

Speaking of this, Lin Chen waved his hand lightly when people didn't seem to understand, and then the projection screen behind him became the introduction screen of 5G mobile communication technology.

First of all, the first technology that appeared in front of people's eyes was beamforming technology, and this was accompanied by a picture of the principle of beamforming technology.

"The first technology to be introduced is beamforming, which is the ability to strengthen the signal in one direction.

Traditional base stations are like light bulbs, emitting their signals in all directions, which was nothing in the pre-4G or even 3G era.

However, because 5G mobile communication technology uses the Sub-6GHz (centimeter wave) frequency band, the communication distance is naturally not comparable to the communication range of 4G or even 3G mobile communication technology.

In order to solve the problem of short communication distance, we have developed beamforming technology, which can be strengthened by the chip to automatically control the signal in a certain direction.

As a result, the communication distance is enhanced, and the signal stability is also improved in disguise, so that consumers can experience a stable and high-speed 5G mobile network. (End of chapter)