"Hey, hey, hey~"

"Hey, hey, hey~"

Along the way, Lin Miaomiao smirked all the way.

"I said, do you want to be so stupid, you do this again, you go by yourself, by the way, don't say you know me." Chen Fan felt the gaze of passers-by and looked disgusted at Lin Miaomiao.

"Hmph~ What do you know, Master Ben was selected to join the radio station, so why do you have to express yourself as a master, right? Don't bother too much, considering the time and place, so let's just invite your incomparably excellent apprentice to eat braised pork, so that your apprentice will be satisfied. Lin Miaomiao took it for granted, she suffered a big loss, and her face was painful.

"Please Lin Miaomiao figure out a problem, that is, I am the acting webmaster, you don't want to scold me well, beware of me opening you." Chen Fan nodded Lin Miaomiao's dog head, which made her recognize the reality clearly.

"Hey, hey, brother, don't be angry, I'll brush the dishes for you later." Lin Miaomiao hurriedly curried favor.

"Get out of the way, you use you to wash the dishes in the cafeteria?" Chen Fan said angrily.

"Oh, that's it, then if you feel tired from eating for a while, I'll help you eat, no thanks, although then I'll be very tired~ But I'm not afraid of hardship, I'm not afraid of tiredness, isn't it my good quality?" Lin Miaomiao hesitated again and again, and finally reluctantly made it difficult.

"Why do you love it so much?" With his long arm raised, Chen Fan was about to fight.

Lin Miaomiao subconsciously closed her eyes, but what she ushered in was a good-looking hand that gently pinched her face.

Chen Fan was reluctant after all

His own apprentice, even if he is angry to death, he must be spoiled.

"Hey~"

Lin Miaomiao smiled when she saw this, and followed Chen Fan.

"The little girl eats dry, which is not fat, it is simply a waste of national food." Chen Fan always couldn't help but bully Lin Miaomiao.

"Then please let me waste all the national food, in terms of eating, master, you don't have to work hard, even if you trample on my dignity, you can't stop me!"

Chen Fan: "......"

After dinner, Lin Miaomiao was sent to the bedroom, and Chen Fan went home.

Today's learning task is over.

Chen Fan skillfully opened the live broadcast

After saying hello to the audience, he began to inquire about what he thought was more important.

4g

Fourth-generation mobile communication technology

Speaking of 4G, it is better to talk about the development process of mobile communications.

First of all, it is naturally 1g, 1G era, silly white sweet era can only voice can not access the Internet.

At the end of the day, only voice calls are available

But it was already strong in those times

People from all over the world, no matter how far apart they are, as long as there is a signal, they can talk.

As the originator of mobile communication, 1G is an analogue system, which is a cellular wireless telephone system based on analog technology. The 1G system uses frequency division multiple access (FDMA) analog modulation to convert voice from 300Hz to 3400Hz to a high-frequency carrier frequency of MHz (generally 150MHz or above).

1G is the beginning of wireless calling

In the sixties of the twentieth century, the concept and theory of cellular system (1G application system) were put forward by Bell Labs and other units in the country of rice, but due to the limitations of hardware, it took 70 years to formally develop to industrialization.

In December 1971, ATT submitted a proposal for cellular mobile services to the FCC; In 1978, Bell Laboratories successfully developed the world's first mobile cellular telephone system AMPS; In 1982, AMPS was approved by the FCC, and the 824-894MHz spectrum was allocated and put into commercial operation.

Presumably many people don't know about ATT

But you only need to be the Rice Telephone and Telegraph Company, a rice country telecommunications company, the second largest mobile operator in the rice country, founded in 1877, has a long-term monopoly on the long-distance and local telephone market in the United States, once ranked first with the global digital economy, and later in the network is no longer brilliant, but it is also ranked fifth, still a behemoth.

There are many typical, classical, and failed cases of changing careers about it, and students in economics can study it.

The 2G era, a classic generation across the era

In the 70s of the 20th century, it entered the 2G era, opened digital cellular communication, got rid of the defects of analog technology, and had a cross-era improvement. And the mobile phone can send text messages and surf the Internet.

Every era of mobile data reform has brought about a wave of behemoths.

In just 10 years, Nokia has surpassed Motorola to become the world's largest mobile phone manufacturer.

Apple launches the first generation of smartphones

Across the globe

Fuso is the world's first 3G network start, in December 2000 Fuso issued a 3G license by way of bidding.

After checking this, Chen Fan found that the history of the Holy Kingdom was similar to that of his previous life, and it had not changed much.

As for 4G, it's coming soon.

The fourth generation of mobile communication technology, Chen Fan naturally can't get involved, even if he knows the various network technology architectures of 4G, it has nothing to do with Chen Fan.

The key lies in the technological changes brought about by 4G.

Only those who have experienced the beginning of the 4G era know what kind of changes 4G has bringed.

Many mobile phone manufacturers are in debt, and because technology and policies cannot keep up, they go out of business overnight.

For example, Gionee.

It's a behemoth, all over the country.

A year after the popularity of 4G, it went out of business.

The fierce competition is conceivable.

There may be other factors, but you can't deny that it did fall into change.

Of course, these are all important credentials for Chen Fan to determine whether the economic trajectory is the same as his previous life.

The year is 2013

It won't be long before the first 4G mobile phone will be launched in China.

At the same time, it was also in this year that the terrifying purchasing power of the people was demonstrated.

Sell shen to buy apples

Yes, there really is, but unfortunately it is lost to the speed of technological development.

Of course, this urgency, Chen Fan is not worried about this.

He already has other plans for eating the meat of 4G mobile phones.

He is anxious about the upcoming launch of the daily cool run at the end of the year

This mobile game, which has been popular for many years, has a different meaning.

It makes Linlang Heaven and Earth, which has been unknown for many years since the flying car, return to the eyes of penguins again.

And then there's 15 years of heroic deeds

You may not know the name.

But its next name is incomparably louder!

Glory to Kings!

It is the glory of the king that opens the prelude to the millennium of mobile games

"Let's hope it's not too late!" Chen Fan retreated his chair to the window, he was here, but his heart seemed to have flown to Chongqing.

The call went out

"Help me book a plane ticket for Sunday, fly to Chongqing!"