After three days in Disneyland, Chen Zishan was satisfied, and took a plane back to China to visit relatives, Zhang Lexing actually wanted to go back with her, but before coming to the United States, Yang Xinxin had explained that after watching the World Cup, she went to the headquarters of VisualSystem Group, and now she has been releasing pigeons for more than a week.

It was more than 500 kilometers from Los Angeles to San Jose, and Zhang Lexing and several bodyguards drove in two cars for more than five hours before finally arriving in San Jose. Unable to take a break, Zhang Lexing first came to Yang Xinxin's office at the headquarters of VisualSystem Group.

Yang Xinxin's office doesn't look much different from before, when Zhang Lexing walked into the door, Yang Xinxin was sitting alone on the sofa and seemed to be thinking about something, the coffee table in front of the sofa was covered with a large piece of silk cloth, just looking at the raised part of the silk cloth, it is estimated that there should be a lot of things underneath.

Hearing someone come in, Yang Xinxin stood up and said with a smile: "Brother, you are finally here, I have been waiting for you for more than a week." ”

"Sister Xin, I'm sorry, I've been waiting for a long time. Zhang Lexing made an apologetic gesture.

"Forget it, it's good to come. Yang Xinxin beckoned: "Brother, come and sit here." ”

Zhang Lexing nodded, came to the sofa and sat down, Yang Xinxin followed and sat next to him, and put Zhang Lexing up and down on his side, making Zhang Lexing a little confused.

"Sister Xin, you are ......"

"I heard that you and your little sister have traveled around Los Angeles quite a bit, so you must have had a lot of fun. Yang Xinxin teased with a smile.

"Well...... "Zhang Lexing smiled awkwardly.

"This is normal, brother, you are not young, and it is time to find someone to talk about love seriously. By the way, how does that girl look, she should be very beautiful, when can she bring it to her sister to see, don't be too mysterious. After saying a few words, Yang Xinxin's natural gossip attack of women, and she began to ask questions: "How tall is that girl, what is her measurements, and how is her personality?......

Zhang Lexing couldn't help but cover his face and begged for mercy: "Sister Xin, just let me go, Zishan and I haven't known each other for a long time, so I can answer so many of your questions." ”

"It's all called Shangzishan so affectionate, and said that they haven't known each other for a long time. Yang Xinxin waved her hand and said, "Forget it, I'll let you go today, but next time I have a chance, I must bring her to my sister to see." ”

"Sister Xin, don't worry, I will definitely bring Zishan here. ”

Yang Xinxin stood up and walked towards the Xiaoice box in the office, and after taking two steps, she turned back and asked, "Brother, do you want to have something to drink?" ”

"No need. Zhang Lexing shook his head.

Yang Xinxin stopped, walked back, held the sofa with one hand, and said, "Brother, in fact, I asked you to come over this time, mainly to let you consult." ”

After speaking, Yang Xinxin grabbed a corner of the silk cloth on the coffee table and pulled it down hard, revealing a model. Zhang Lexing stood up and took a closer look, it seemed to be some kind of planning and design sand table.

"Sister Xin, what is this?" This kind of thing didn't seem to have anything to do with the VisualSystem Group, and Zhang Lexing was puzzled.

Yang Xinxin leaned down slightly, looked at the sand table, and then replied: "This is the planning sand table of the VisualSystem San Jose campus, which marks the main layout of the planned new campus. ”

"Come and see," Yang Xinxin pointed to the middle part and said, "This is the core of the entire campus, where more classified research and critical equipment (such as supercomputers) will be placed, and the security level here will be the highest." ”

"Here," Yang Xinxin pointed to the periphery and said, "Around here are regular research institutes, and fifty buildings are planned, of which forty-two belong to the VisualSystem San Jose Research Institute, which will be used by employees to carry out various research, and the remaining eight are auxiliary buildings to provide various services for employees, such as cafeterias, fitness centers, laundry rooms, etc." There will be large green spaces between the buildings, as well as ponds, gardens, outdoor sports fields, etc...... In short, it is necessary to provide employees with a comfortable working environment, create a free working atmosphere, and allow employees to give full play to their sense of innovation. When the park is built and moved over, the place will be bigger, and there will be no need to be crowded into one building like now. ”

After listening to what Yang Xinxin said, Zhang Lexing had a picture of the future of the VisualSystem San Jose Park in his mind, and couldn't help but think of his own industries in China.

"Brother, I still have the planning drawings of the park in my bookcase, and I am interested in taking a look. Well, it's inside the second bookcase on the right. ”

Zhang Lexing came to the bookcase on the right, pointed with his finger, and asked, "This is the cabinet?"

"Yes, that's it. Yang Xinxin nodded: "The password is 85106"

Zhang Lexing entered the number that Yang Xinxin entered on the password disk, and the second bookcase on the right opened in response, and there were a lot of rolled up drawings inside. Hydropower design, etc., even includes detailed planning for each building, these planning and design are very detailed, but most of them make Zhang Lexing dizzy, after all, they are things that have not been touched for a long time. However, the network part of the plan evoked Zhang Lexing's memories when he was a network engineer, and he studied this part very seriously.

Zhang Lexing spread a copy of the overall plan of the campus network on his desk, and then beckoned to Yang Xinxin: "Sister Xin, come here." ”

"Well, brother, have you found something wrong?" Yang Xinxin got up and walked over, looked at the drawings and asked.

"Look here," Zhang Lexing nodded on the drawing with his hand, and said: "The backbone network of the entire park planned on the drawing uses FDDI (optical fiber distribution data interface, the physical structure is two parallel, relatively reverse transmission of the double-ring structure network, using the timing token transmission protocol), although FDDI is a good choice at present, the transmission distance is long, the speed is not slow, and it is relatively safe, but this thing is not cheap, and it is a shared structure, and when the amount of data comes up in the future, this backbone will become a bottleneck." ”

"Brother, I don't understand the Internet, so what do you think would be better. ”

"Use a gigabit network. Zhang Lexing said casually.

"Gigabit network? I think I've heard of it. Yang Xinxin asked suspiciously.

As soon as the words came out just now, Zhang Lexing knew that something bad was wrong, how could there be a gigabit network in these years, and the 100 gigabit network was just beginning to become popular, so he quickly changed his words: "Gigabit network is the most cutting-edge technology, and it is not yet mature. ”

"Oh, that's the case, so what kind of network should be used?" Yang Xinxin didn't doubt him, but fortunately she was a layman in network technology, otherwise Zhang Lexing wouldn't be so easy to fool around.

Zhang Lexing is a little hesitant, in fact, the future network structure he knows, it is definitely the world of optical fiber network, and even has a trend of developing to the desktop, as the backbone of the park is generally gigabit or 10 gigabit optical fiber backbone, the protocol is generally Ethernet, and long-distance transmission is generally used SDH (synchronous digital system) or even DWDM (dense optical wavelength division multiplexing system, the capacity can reach hundreds of G, or even more), now these popular token ring network, FDDI and everything have gone to the garbage heap, and even the now emerging ATMs (Asynchronous Transfer Mode, a network exchange protocol, not bank teller machines) have gradually become regionally marginalized by then. I want to use Ethernet technology, but now Ethernet has just reached 100 megabits, and the related equipment has not been on the market for a long time, and the maturity is not high.

After weighing for a while, Zhang Lexing finally made a decision: "Sister Xin, as far as I know, there is currently an ATM technology, the development potential is still relatively large, it should be used as the backbone of the campus, as for the lower layer of the backbone can use fast Ethernet technology (100 Gigabit Ethernet), if you want to know more, you can find someone from Cisco to consult, I believe their network engineers will put forward more pertinent opinions." ”

In fact, this structure must only be a transitional in Zhang Lexing's view, but the current technical conditions can be so for the time being, and only when the Ethernet technology matures in the future will find a way to replace it.

Yang Xin happily accepted Zhang Lexing's opinion, and deliberately took a notebook to write it down. After saying this, Zhang Lexing thought that this matter was over, but he didn't expect Yang Xinxin to have a bigger surprise to come.

"Brother, we are planning not only for San Jose, but also for Redmond and Boston. Redmond is because Microsoft is there, and it has developed for so many years and has a certain amount of R&D strength, so it plans to have a similar campus, but the scale will be smaller. Boston has famous universities such as Harvard University and MIT, and building a campus can make full use of its excellent talents, so there will also be a plan to build a park. This is the construction plan of the three major R&D parks in China (referring to the United States) in the next few years, in addition to the construction of similar R&D parks in Europe and Asia, in our planning, the future VisualSytstem Group will take R&D as the core, and at the same time determine the leadership position of the operating system and application software, it will also develop in other aspects, and the R&D projects are not limited to the current operating system, In terms of application software, there will be more research directions, and there will even be a large number of basic research. It is believed that in a few years, the ratio of patent income to the company's total revenue will increase significantly......"

"Sister Xin, the distance between these three parks is not close, have you considered the communication problem between the parks?

"Fiber optic cables? We've inquired that long-distance ones like this are too expensive, so we don't plan to use them, at least not until the cost drops, and we plan to use satellite communications at the moment. In order to have enough safety, we are considering preparing to launch a satellite of our own. ”

"Satellites, your own satellites?" Zhang Lexing felt a little incredulous.

Yang Xinxin nodded and said, "That's right, it belongs to our own satellite." We've been in contact with Hughes (later renamed Boeing Satellite Systems) and it's about $50 million to produce a satellite that meets our needs and has enough margin, and about $30 million for the rocket and launch costs, plus 20 percent insurance and some miscellaneous expenses, and $100 million is enough to get a satellite into space. However, this is only a small head, and the construction of ground control stations and corresponding satellite communication systems requires a relatively large investment, with a preliminary estimate of 6~800 million US dollars. We have consulted with relevant experts, and we can choose to locate our communication satellites in medium and high orbits, and it is best to choose synchronous orbits, so that only one can cover the entire North America and part of Europe, and can meet our communication needs for a long time. If three satellites are located in the same area of synchronous orbit intervals, it will theoretically be able to meet the communication of any location in the world, and then I will be able to use my own satellite to call my brother, but the only drawback is that the ground station must be fixed. ”

Thinking of satellites, Zhang Lexing can't help but think of the popular "Google Earth" in the future: "Sister Xin, if there is a camera on the satellite, wouldn't it be possible to take pictures of the ground?"

"You're thinking beautifully, experts have said, imaging satellites with cameras are generally in low-earth orbit, about 2,000 meters above the ground, so that they can take high-quality photos, and not any higher. ”

Only then did Zhang Lexing figure out that if he dared to play "Google Earth", he had to launch a low-earth orbit satellite, or he could only find commercial companies that provided satellite photos to buy it, and it seemed that this kind of digital earth was not so easy to play.

"Sister Xin, I heard that the position of the synchronous orbit seems to be quite tight, is it true?"

"That's right, it's said that this is related to the resolution of the ground station antenna, so I considered whether to send three first. ”

"Then let's just shoot three stars with one stone, and send all the satellites at once. ”

"Nonsense, launching satellites is not a trick, and it is not something you can send if you want to. I've consulted with people at Hughes and experts on this matter, and they all suggested that it should be launched in three parts, and satellite production also requires a certain period, so I plan to launch three satellites in five years, and then we can ensure our global communication, so that every week, European, and Asian research institutions can maintain regular communication through satellites, and there is no need to make that damn transoceanic phone call again. ”

Zhang Lexing also deeply sympathizes with the transoceanic phone, the current situation is better, the previous transoceanic phone is really, the voice is often loud and small, sometimes it is said for a long time, the money is spent a lot, but Leng did not hear clearly what the other party said, or the Internet era is good.

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