Tian Yaoming came very quickly, and at the same time he brought a man of twenty-eight or nine out to him.

"Senior Brother Tian, ​​Senior Brother Du." Su Yuanshan took his feet back from the coffee table, stood up and shook hands with Tian Yaoming, Du Rusong.

Du Rusong was a Ph.D. in Beijing Post and joined Yuanxin in the first half of the year. At that time, he had two choices, one was to go abroad to work as a postgraduate, and the other was to obey the assignment and go to the post office. Finally, after Tian Yaoming's persuasion, he came to Yuanxin.

After entering Yuanxin, he first passed the running-in period in a small team, then joined the 3G technical team, and successfully "squeezed" Li Yinan's position.

Well, it’s better to say that Li Yinan took the initiative to give in. Li Yinan has the pride of all geniuses. After he realized that his strengths lies in the implementation of technology, he chose deep-rooted base stations and related technologies for base station chips. He was specifically responsible for his mobile communication basic equipment team.

You know, he had been in two teams before, and the reason why he didn't let go was mainly because he felt that there were not many people who were good at making technological breakthroughs - some were powerful, but those people belonged to Pandora's laboratory in terms of architecture.

——Because Pandora was established by Xi Xiaoding, representing the highest technical hall of Yuanxin, no matter what professionalism the big guys are, they basically went to Pandora to join Yuanxin. As for the business, of course, they would not say they would ignore it, but they just wanted to be under Pandora's department...

This is the current situation of the communication technology team. Although it does not affect the progress of R&D, it always makes the communication people a little unhappy...

"NEWBEE Laboratory, who thought of this genius name?" Su Yuanshan let go of the guest sofa, sat back on the small stool, and smiled at the two of them.

"I think." Tian Yaoming grinned and touched Du Rusong: "Old Du thinks it's good, right?"

"Haha... I always have to think a little about it." Du Rusong came to Yuanxin and plunged into the laboratory. He was not familiar with Su Yuanshan and Chen Jing, and was a little uncomfortable. He held the teacup and smiled: "Mr. Shan, Mr. Chen. We sorted out the various technologies of the current third-generation mobile communication technology, and found that in addition to Qualcomm, our patents are the most core. And in terms of the number of valid 3G patents, we also have the most."

The so-called valid patent does not correspond to "invalidity", but refers to valuable patents that can be truly utilized in actual technical implementation.

Su Yuanshan smiled and nodded: "Yes, this is the result of everyone's persistence over the past few years."

"So how far has 3G been progressing now?" Chen Jing also walked out from behind the desk. In order to create a less serious atmosphere, she leaned against the desk and held the water cup and asked casually: "I've just come back and haven't had time to read your progress report last month."

"If we don't pursue experience, we can set up a 3G base station for communication now." Du Rusong smiled and said: "The power needs to be solved urgently now. I heard that Qualcomm is also solving the power problem..."

"Where are other colleagues?"

"The other peers have no chance. Because 3G technology is based on CDMA, I won't talk about it after Qualcomm won the underlying patent, but their strongest is the soft switching technology that has only been completed soon. We studied it and found that this technology is really the core... If we want to do better in 3G technology, no one can get around it."

Soft handover refers to channel switching between cells when the carrier frequency of the pilot channel is the same. During the handover process, the mobile user maintains a communication link with the original base station and the new base station. Only when the mobile station establishes stable communication in the new cell can the contact with the original base station be disconnected. It belongs to the unique handover function of the CDMA communication information system, which can effectively improve the switching reliability.

Su Yuanshan nodded secretly. He knew that the fundamental reason why Qualcomm is called a vested stakeholder of 3G is not actually the basic technology of CDMA - because it is an extension of spread spectrum technology.

Qualcomm's best is that it started CDMA early and then became a tough guy, so it continued to work on all the core technologies surrounding CDMA.

In addition to soft handover, there is also power control - in order to ensure that all mobile devices in the area basically maintain the signal level at an equal level and the communication quality is maintained at a receptable level, the power of the mobile device must be controlled.

Power control is divided into forward and reverse power control, reverse power control is divided into open-loop power control and closed-loop power control, and closed-loop power control is subdivided into outer ring power control and inner ring power control.

There is no doubt that it is also the core technology of the CDMA system.

Moreover, these two core patents cannot be avoided no matter how hard they are...

Yuanxin’s team was already aware of the power of soft switching and the importance of power control. This was already amazing.

Thinking of this, Su Yuanshan asked: "How much has your power control been progressing?"

Du Rusong took a sip of tea and smiled: "We have completed the simulation of the two methods of open loop and closed loop, and are preparing to conduct actual measurements. If the actual measurement is feasible, it means that it has been improved."

Chen Jing asked: "Does the actual test mean building a base station?"

"Yes! It's just a lab-level, tiny."

Chen Jing and Su Yuanshan looked at each other, then laughed and said, "Don't build smaller ones, build larger ones, covering the entire industrial area."

...

Next, Chen Jing told the two of Wang Rui’s idea just now, allowing them to build Yuanxin into a demonstration base for the next generation of mobile communication network while improving the experiment.

Of course, to build a high-power base station, it must also be approved by relevant government departments. However, in Yuanxin, this is not a problem at all. In order to meet Yuanxin's network communication needs, the provincial telecommunications department has specially pulled an optical fiber into Yuanxin.

Even the Electrical Department, which owns the "National Key Laboratory of Broadband Fiber Transmission and Communication System Technology", has not yet enjoyed this kind of treatment.

As for NEWBEE Laboratory, it naturally obtained the permission of Chen Jing and Su Yuanshan at the same time.

However, before leaving, Tian Yaoming secretly pulled Su Yuanshan aside.

"Xiaoshan, Mr. Xi will not have any objection, right?"

"What do you think?" Su Yuanshan asked with a smile.

Tian Yaoming was sweating all over.

To be honest... the older the Yuanxin, the more qualifying the person, the more he feels, Xi Xiaoding - When Xi Xiaoding joined Yuanxin, he was a transcendent and awesome in Yuanxin. When developing EDA, few people had never been caught by him...

Although Tian Yaoming has long been a big shot, he is even called the father of mobile phones. However, the lab he is now in, and a discerning person can look at it and look at Pandora of Xi Xiaoding.

To be honest, he is still a little vain.
Chapter completed!