1991 Starting from the core

Tian Yaoming came very quickly, and he also brought a man in his late twenties.

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

Du Rusong is a Ph.D. student from Beijing Postal and Telecommunications University. He joined Yuexin in the first half of the year. At that time, he had two choices: one was to go abroad as a postdoc, and the other was to obey the assignment and join the Post and Telecommunications Bureau. Finally, under Tian Yaoming's persuasion, he came to Yuanxin.

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

Well, it's not so much about being squeezed as it is about Li Yinan taking the initiative to give in - Li Yinan has the pride of all geniuses. After he realized that his specialty lies in technology implementation, he chose the related technologies of deep-rooted base stations and base station chips. . Responsible for its own mobile communication infrastructure equipment team.

You know, he was in charge of two teams before, and the reason why he didn't let go was mainly because he felt that there were not many great people in the group who were making technological breakthroughs - there were some great ones, but those people belonged to Pandora in terms of structure. laboratory.

——Because Pandora was founded by Xi Xiaoding, it represents the highest technical palace of Yuanxin. Therefore, no matter what major they are engaged in, those big guys basically go to Pandora after entering Yuanxin. As for the business, of course they won't say that they don't care about it, but they will just hang it under the Pandora department...

This is the current situation of the communication technology team. Although it does not affect the research and development progress, it always makes the communication people a little unhappy...

"NEWBEE Laboratory, who came up with this genius name?" Su Yuanshan gave up the guest sofa, sat back on the small stool, and smiled at the two of them.

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

"Haha... you have to think about it." After Du Rusong came to Yuanxin, he rushed into the laboratory. He was not familiar with Su Yuanshan and Chen Jing, and was still a little uncomfortable. At this time, he held the tea cup and said with a smile: "Mr. Shan, Mr. Chen. We sorted out the current third-generation mobile communication technologies and found that, except for Qualcomm, our patents are the most core. And in terms of the number of valid 3G patents, we also have the largest number."

The so-called valid patents do not correspond to "invalid", but refer to valuable patents that can be truly utilized in actual technology implementation.

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

"So how far has 3G progressed now?" Chen Jing also walked out from behind the desk at this time. In order to create a less serious atmosphere, she leaned in front of the desk and asked casually while holding a water glass. : "I just came back and I haven't had time to read your progress report from last month."

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

"Where are the other colleagues?"

"Other peers have no chance. Because 3G technology is based on CDMA, Qualcomm has obtained the underlying patent, not to mention, but their strongest point is the soft handover technology that they have just completed. We did some research 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 communication links with both the original base station and the new base station. Only when the mobile station establishes stable communication in the new cell does it disconnect from the original base station. It is a unique switching function of the CDMA communication system and can effectively improve switching reliability.

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

The best thing about Qualcomm is that it started CDMA early, and then got stubborn, so it continued to work all the way and developed all the core technologies surrounding CDMA.

In addition to soft handover, there is also power control - in order to maintain the signal level of all mobile devices in the area at basically the same level and maintain the communication quality at an acceptable level when they arrive at the base station, the power of the mobile device must be controlled.

Power control is divided into forward and reverse power control. Reverse power control is further divided into open-loop power control and closed-loop power control. Closed-loop power control is subdivided into outer-loop power control and inner-loop power control.

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

Moreover, these two core patents cannot be circumvented...

It is remarkable that the team at FarCore can realize the power of soft switching and the importance of power control.

Thinking of this, Su Yuanshan asked: "How far have you progressed in power control?"

Du Rusong took a sip of tea and said with a smile: "We have completed the simulation of the open-loop and closed-loop methods and are preparing for actual measurement. If the actual measurement is feasible, it means it is perfect."

Chen Jing asked: "Actual test, does it mean building a base station?"

"Yes! It's just a laboratory-level, micro-scale one."

Chen Jing looked at Su Yuanshan, then laughed and said: "Don't build a small one, build a big one that covers the entire industrial zone."

…

Next, Chen Jing told the two of Wang Rui's ideas just now, asking them to perfect the test while also building Yuanxin into a demonstration base for the next generation mobile communication network.

Of course, to build a high-power base station, you must obtain approval from relevant government departments, but in Yuexin, this is not a problem at all - in order to meet the network communication needs of Yuexin, the provincial telecommunications department has specially pulled an optical fiber Enter Far Core.

This kind of treatment has not been enjoyed even by the Electronic Science and Technology Corporation, which owns the "National Key Laboratory of Broadband Optical Fiber Transmission and Communication System Technology".

As for the NEWBEE laboratory, it naturally received permission from both Chen Jing and Su Yuanshan.

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

"Xiaoshan, Mr. Xi won't have any objections, right?"

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

Tian Yaoming was sweating.

Frankly speaking... in Yuanxin, the more senior people are, the more they feel a little embarrassed about Xi Xiaoding - when Xi Xiaoding joined Yuanxin, he was a transcendent and awesome existence in Yuanxin in terms of academic ability, identity and technology. When developing EDA, there were few people who didn't experience his...

Although Tian Yaoming is now a unique boss, he is also known as the father of mobile phones. But now the laboratory he has set up, to a discerning eye, looks like it is going against Xi Xiaoding's Pandora.

Frankly speaking, he is still a bit weak.