The rejuvenation of a great nation: from educated youth to national treasure scientist

The communications business is now under the responsibility of the Ministry of Posts and Telecommunications.

If Wang Haoran wanted to build a mobile communications network, he naturally had to apply to the Post and Telecommunications Department and obtain approval.

Wang Haoran wrote a project application report and submitted it to the Ministry of Posts and Telecommunications.

Liu Zijian is still the head of the Ministry of Posts and Telecommunications.

Previously, when Wang Haoran was working on the switch project, he had greeted Liu Zijian.

It can be said that Wang Haoran’s switch changed the communication situation in Longguo.

It makes fixed-line communications easier and improves the quality of calls.

This is also a major political achievement of Liu Zijian as the person in charge.

After Wang Haoran submitted his project application, the people from the Ministry of Posts and Telecommunications did not dare to delay and immediately submitted the project application to Liu Zijian.

After reading the content of Wang Haoran's project, Liu Zijian nodded and felt that there was great potential in this.

Because the convenience of communication is what people have always been pursuing!

In this day and age, it is really not easy to contact individuals.

If you wanted to find someone, you had to call a landline.

But no one will wait next to the landline to answer your call.

Mobile communications obviously allow barrier-free communication anytime and anywhere.

This is rare.

Liu Zijian immediately decided to visit Wang Haoran.

Today, the situation is different from what it was a few years ago.

Wang Haoran's current status and position are no longer what they used to be, and he is considered one of the biggest figures in the country.

Liu Zijian naturally couldn't call him to come and see him.

It is better to take the initiative to visit, which also shows respect.

Liu Zijian first called Wang Haoran to communicate.

After receiving the call, Wang Haoran happily said: Comrade Liu Zijian is welcome to come and communicate.

Liu Zijian went to Pangu Technology Company that afternoon.

When he saw Wang Haoran, he smiled and said, "Comrade Haoran, your idea for mobile communications is very good!"

“Can it really achieve long-distance communication across the country?”

Wang Haoran smiled and nodded and said, "Of course!"

"Because the cellular network can be connected through regional network centers one by one, by dialing the cellular number, you can quickly find the other party and make a mobile call."

“This technology is actually similar to a walkie-talkie.”

"It's just that the communication distance of a walkie-talkie is shorter."

Liu Zijian said, "According to what you said in your research application, if you want to build a nationwide mobile base station network, I'm afraid it will require a lot of investment, right?"

Wang Haoran nodded and said, “Yes, it requires a lot of money and a long time to build.”

"But when communication becomes more convenient, economic development will also speed up, right?"

"After all, differences in information can often lead to large-scale commercial circulation. And commercial circulation leads to economic development."

Liu Zijian nodded and said, "That makes sense!"

"Our Ministry of Posts and Telecommunications strongly supports your project! However, the project funding may not be too much. Is one million enough?"

Liu Zijian still felt a little embarrassed.

In fact, one million today is still an astronomical figure for the vast majority of ordinary people.

Nowadays, it is still an era of people earning ten thousand yuan each.

However, there are more and more people with an annual income of 10,000 yuan in economically developed areas.

Wang Haoran smiled and nodded, saying, "It's not too little."

"I am very grateful for your support in this project."

Liu Zijian waved his hand and said, "Comrade Haoran, your project is good for the country and the people. We must give our full support!"

Just like that, the project was approved.

Wang Haoran also began to form his own research team.

If you want to build a mobile network, you must build base stations, core networks and mobile terminals.

Base stations are the core facilities of mobile phone networks.

It is responsible for receiving and sending radio signals.

The base station is connected to the core network through optical fiber or microwave links to realize the transmission and exchange of communication data.

It can be said that the base station is the bridge between users and the mobile network.

Generally speaking, there will be no mobile network signals in areas where base stations cannot cover.

The core network is the data processing center of the mobile communication network.

It is responsible for processing tasks such as user call requests, data transmission and router selection.

The quality and efficiency of the core network are related to the reliability and speed of communication services.

The mobile terminal is the user's mobile phone.

Mobile phones receive and send radio signals through antennas, which, through base stations and core networks, ultimately enable direct communication between users.

In the past, mobile communications started with analog signals. After several years of development, it evolved into the era of digital signals.

The so-called analog signal refers to the use of continuously changing voltage and current to represent information.

The amplitude, frequency or phase of an analog signal changes continuously over time.

Analog signals have significant disadvantages, mainly as follows:

First, each sub-band can only be used by one user. The call quality is poor, the call confidentiality is poor, and it is very easy to be cracked.

Secondly, its functions are very limited. It can only provide basic voice services and cannot provide rich value-added services such as data transmission and high-speed Internet access.

Third, its network coverage is small and its roaming function is poor, which limits the user's mobility and communication convenience.

Fourthly, analog cell phones are too large, bulky and difficult to use.

Last but not least, it cannot meet users' demand for communication services.

Wang Haoran thought that if he was going to do it today, he might as well skip the mobile analog communication stage and go directly to the digital mobile phone system stage.

With Longguo's current leading electronic technology, it is not difficult to engage in digital mobile communications.

The research team formed by Wang Haoran includes almost all scientists in the fields of wireless communications, electronic technology, materials, and batteries in Beijing.

Including his father-in-law Xiao Renming and the director of Peking University’s Radio Department Li Baoping.

Among these experts, there are four academicians and six or seven who have won national scientific awards.

They all gladly accepted Wang Haoran's invitation.

Before starting work, Wang Haoran naturally had to hold a meeting and explain his ideas about the digital mobile communication network in detail and carefully.

He spoke in great detail, covering every aspect of mobile communications construction.

This meeting is equivalent to a training.

Wang Haoran talked for more than a whole day.

He even explained in detail the key components of each key device in the 2G communication network.

The next morning, after he finished his lecture, he smiled and asked, "Teachers, if you have any questions, you can ask them now."

The team members then raised a series of questions, all of which were areas where they did not fully understand.

Wang Haoran gave it another explanation in a simple and easy-to-understand way until everyone had no more questions. Then Wang Haoran began to assign tasks.

Some are responsible for the research of RF antennas, some are responsible for the research of signal receivers, and some are responsible for the research of baseband.

In short, the allocation is based on each person’s research expertise.

As for the more difficult hardware and software such as the chips in the mobile phone information exchange and processing center, Wang Haoran himself is responsible for them.

If you want to develop an entire 2G network device, you need to design and develop a series of chips.

Fortunately, chip design can now be completely automated using software tools, otherwise it would be very troublesome.

Because Wang Haoran started early, he and his team have developed a series of chip design tools.

Pangu Technology Company has currently developed a complete set of tools for its own use, such as specification development and document writing tools, architecture modeling and simulation tools, logic design tools, verification tools, compilers and related tools, simulation and testing tools, deep learning frameworks, and EDA tool software.

Of course, these sets of tools have now all been registered for international patents.

With these, Pangu Technology can ensure that its chip design is unique in the world.

If chip companies in other countries want to use these tools, they have to pay copyright fees.

Of course, the copyright fees charged by Pangu Technology are quite reasonable. Unlike some lizard-like companies, which own the copyright of a certain tool and then demand copyright fees like crazy, thus draining the pond to catch fish.

This also makes Pangu Technology's tools very popular all over the world.

It was already the end of 1981, and research work in various areas was progressing at a very rapid pace.

The Hong Liuding, directed by Wang Haoran, began to equip the troops.

After the delivery of the J-10 fighter jets, the air defense capabilities of the Dragon Country were rapidly enhanced.

The J-10 has fought several battles with aircraft from certain forces in the southern waters, and the electronic pods it carries have also caused the other side to suffer several losses.

The test flight of Y-10 is proceeding in an orderly manner.

After a month of test flights, almost no major problems were found. All design technical indicators were met, flight reliability was completely fine, and fuel economy was particularly satisfactory.

Naturally, customers are deeply involved in the flight test work.

Both domestic airlines and the Air Force conducted test flights and inspections using their own standards.

Everyone was very satisfied with the result.

Both airlines and the Air Force have urged that the Y-10 should be finalized and put into mass production as soon as possible.

After all, the development of domestic civil aviation is very fast now, and a large number of new aircraft are needed. The Air Force hopes to develop early warning aircraft and electronic warfare aircraft as soon as possible.

于是，运10的量产在1981年的12月30日正式开始。与此同时，运10改预警机的工作也同时拉开了序幕。

Time flies, and 1981 passed quickly.

The Spring Festival in 1982 was in January.

The Spring Festival is the grandest festival of the year in Dragon Kingdom.

People across the country have begun to prepare for the Spring Festival.

However, Wang Haoran definitely has no intention of paying attention to the New Year.

He is leading his team to accelerate the development of 2G networks.

The research progress is extremely fast.

This is due to the fact that Longguo’s industrial modernization development has now reached the stage from quantitative accumulation to qualitative change.

By January 1982, 1, all equipment for the entire 20G network had been developed.

Moreover, with the support of Wang Haoran, an experimental 2G network was first built in Pangu Science Park.

After the network was built, Wang Haoran would naturally test it.

At around 20 o'clock in the morning on the 9th, Wang Haoran personally participated in the test.

During the test, he and Xiao Renming held small bar-screen mobile phones at two ends of the science and technology park, about 1.5 kilometers apart.

Xiao Renming called Wang Haoran and the two conducted a test for about a minute.

The test results show that the call connection speed is very fast and the call quality is also very good, stable, clear and fidelity.

This shows that mobile calls as a means of communication are basically feasible.

After Wang Haoran announced the test results, cheers rang out around him.

Of course, after the test, some people raised their own doubts.

The person who raised the question was CCTV reporter Wang Jianguo who happened to be there to interview Wang Haoran.

Wang Jianguo said: "Comrade Haoran, I have a question. Actually, the communication distance of walkie-talkies can reach two or three kilometers now."

"If that's the case, then what are the advantages of a cell phone over a walkie-talkie?"

Wang Haoran smiled and said, "Walkie-talkies can only achieve short-distance communication within the same frequency."

"Our mobile phones obviously use a different model."

"In the future, our mobile phones will be able to make calls across the country."

"Also, I can now use my mobile phone to call landline numbers and eventually talk to landline users."

Wang Jianguo was a little skeptical: "Is this true? Can I actually make a landline call and have a conversation?"

Wang Haoran smiled and said, "It seems that Comrade Jianguo doesn't quite believe it."

"Then I'll give it a try now."

As he spoke, he used his cell phone to call the office number of Liu Zijian, the head of the Ministry of Posts and Telecommunications.

It is said that Liu Zijian was reviewing the annual report of the postal and telecommunications sector for the whole year of 1981 in his office that day.

Throughout 1981, the Ministry of Posts and Telecommunications maintained a rapid development trend.

The main increase was provided by landline telephones.

Nowadays, more and more individuals choose to activate fixed-line telephone services.

The number of users of fixed-line networks is increasing rapidly.

The increase in fixed-line users has made the business volume of the entire postal and telecommunications sector very impressive.

Liu Zijian looked at the report and nodded with a smile.

In the early years, when people talked about their yearning for a good life, there was a phrase like this: upstairs and downstairs, electricity and telephone.

Now more and more ordinary people have achieved this.

"Jingle Bell--"

The phone on his desk rang.

Liu Zijian picked up the microphone and put it to his ear: "Hello!"

A familiar voice came from the microphone: "Hello, Liu Bu!"

"Do you recognize who I am?"

Liu Zijian smiled and said, "Comrade Haoran!"

"How could I not hear that?"

"I heard that your mobile communication network technology is almost ready?"

"I said I was going to go take a look these two days, haha!"

Wang Haoran said: "I am using my mobile phone to talk to you now."

Liu Zijian was shocked: "What? You are talking to me on your mobile phone now?"

“I can’t hear it.”

Wang Haoran smiled and said, "This shows that the call quality is good! Haha! Need I say more?"

Liu Zijian was still a little confused: "But, you said that there must be mobile base station signal coverage before we can make a call."

"I'm afraid we don't have a mobile base station here?"

Wang Haoran smiled and said, "Comrade Zijian, although you don't have a mobile base station there, after I dial your office number, the base station and network center here will use the protocol with the wired telephone network to transmit the signal through the telephone line to dial your phone."

Liu Zijian was very excited: "The call quality is really great!"

“It’s very clear…”

"This mobile communication seems to be a really good communication mode."

"I want to go over there right now and take a look, is that okay?"

Wang Haoran smiled and said, "Of course, we will be waiting for you."

After hanging up the phone, Wang Haoran glanced at Wang Jianguo and said, "I believe the mobile phone is different from the walkie-talkie this time, right?"

Wang Jianguo naturally witnessed the whole process.

He thought this was incredible.

"Oh, can I give it a try? I'll call our editor-in-chief and ask him to save an important news slot for me."

Wang Haoran smiled and nodded and said, "Of course!"

"Here you go, hit it now."

Wang Jianguo took the mobile phone.

He examined the small candy-bar phone carefully.

This thing can actually make calls directly to a landline phone?
Mobile phones have not yet appeared in the world.

Even though some people in Jusa had been experimenting with it, this was the world's first mobile phone.

It would be more than a year before Motorola came out with their big brick mobile phone.

Moreover, such a thing actually costs 20,000 to 30,000 RMB.

Wang Jianguo was greatly shocked.

In fact, he was shocked by Wang Haoran almost every now and then.

In the past, Wang Jianguo was indeed a bit pro-Western.

But now, he has basically become a legitimate heir.

After all, he realized that his country's high technology is really not bad!

Wang Jianguo called the office phone number of CCTV editor-in-chief Guo Peiran.

After entering the phone number, press the dial key directly.

The call was indeed made.

A long tone indicating the call was connected came from the microphone.

"Di-"

"Di-"

Wang Jianguo was very excited at the moment.

Holy crap! I can actually talk to the landline directly.

However, the call was connected, so why didn’t the editor-in-chief answer the phone?

At this moment, Guo Peiran was seeing a visitor out of his office.

He walked the man to the stairs and then headed for his office.

Just as I reached the door, I heard the phone on my desk ringing.

Guo Peiran hurried into the room, grabbed the microphone and put it to his ear.

However, by this time, the ringing had ended.

The call was not connected.

Wang Jianguo said: "Comrade Haoran, the call seems to be connected, but no one answered."

Wang Haoran said: "That must mean your editor-in-chief Guo is not in the office."

"Or, you can fight me later."

As for Guo Peiran, he didn't pick up the phone, but quickly looked at the caller ID.

Now, Longguo’s landline phones have caller ID and caller number query functions.

This is mainly due to the development of Longguo chip technology.

Guo Peiran quickly found the phone number of the person who had just called.

That number is very strange, it doesn't look like a normal phone number at all. (End of this chapter)