Chapter 1332

For the communication between mobile communication and fixed telephone network, there needs to be a base station. The function of this base station is to provide a certain radio coverage area and a radio transceiver station for information transmission with mobile telephone terminals through mobile communication switching center.

It can be said that the set of equipment brought by Qin Guan in the hotel is a miniature base station, and the most common base station is the mobile signal transmitting tower outside.

A complete base transceiver station includes wireless transmitting / receiving equipment, antenna and signal processing part unique to all wireless interfaces. The base transceiver station can be regarded as a wireless modem, which is responsible for the reception, transmission and processing of mobile signals.

However, any base station can cover a certain area. For example, Qin Guan's small base station has an operating distance of only five kilometers.

For large base stations, the operating distance is also limited. In this way, once leaving the operating range of the base station, the mobile phone cannot realize communication.

At this time, networking is needed, that is, in an area, multiple sub base stations and transceiver stations form a cellular network, and the transmission of mobile communication signals is achieved by controlling the mutual transmission and reception of signals between transceiver stations and transceiver stations. The area within this range is what we often call network coverage.

Because this transmission is much like a honeycomb, it is also called a cellular mobile phone network.

The coverage of this network is very extensive, and the coverage of blind areas can be increased through continuous networking, so as to finally realize the answering and making of calls anytime and anywhere.

When the person holding the mobile phone is moving, another problem will be involved. The signal he starts is transmitted at one base station, and then the signal is transmitted at another base station. When he moves back and forth between the two base stations, the signal cannot be disconnected, otherwise the call quality will decline.

Two people hold the phone to make a phone call. What if it happens to be the base station handover at the most critical time, and they miss it?

For mobile communication, the ability to switch between base stations is the most important.

This is only a portable and beautiful mobile phone, which is only one step. How to provide high-quality calls is the place that can impress consumers most.

Now, Qin Guan mentioned this aspect, which stunned Carl.

"Mr. Qin, I don't understand you," Carl said.

I cannot understand you? Qin Guan smiled: "general manager Carl, I mean, if you want to test the quality of our system, at least you need to arrange enough base stations and network in a city, so that you can really detect it. If you want to test my equipment directly, it's unscientific and you can't judge the quality."

But that would be too expensive! Carl secretly thought in his heart that it would not cost much to borrow this set of equipment, but if networking was carried out in the whole city, the cost would be high, which can not be borne by ordinary companies!

Is it worth paying so much for such a breath? I'm afraid we have to invest all the working capital of the whole company.

Carl began to hesitate.

"I knew you didn't understand." Qin Guan said, "you are really a layman in this field, but I don't blame you. Now no one except us is aware of this problem, and the mobile phone of Motorola has never considered this problem."

When Qin Guan said this, Carlton was delighted. He had found a way to defeat solo!

Carl really trusts Qin Guan's mobile phone. He can say all these technical problems, which is enough to show that their company's research is very in-depth. At the same time, such an explanation is also justified. This switching problem should be the most critical.

Since the Motorola mobile phone has not been considered, it seems that this aspect is definitely not good. When it is compared in the future, we can get the rolling effect. Yes, that's it!

Carl was very proud when he thought of it in his heart, but he thought that if Qin Guan wanted to build a network, he had to build a network in the whole city. I'm afraid the cost would be astronomical!

In fact, it's good to say now. After all, the public doesn't feel much about the so-called radiation. When later generations come, everyone talks about radiation discoloration. If they set up a base station antenna at their door, I'm afraid countless people who have nothing to do will start to protest.

As long as someone encourages them, they will protest. The purpose is also very clear. It is to let the base station leave. They are afraid of being radiated. However, when the base station moves away, they will protest about the poor signal of their mobile phone.

Now, everyone doesn't have this consciousness.

"President Qin, how many base stations do we need if we build a network about 100 kilometers on our intercontinental highway?" Carl asked Qin Guan.

In the urban area, every inch of land is worth every inch of money. Looking for a place to set up an antenna requires approval and cumbersome procedures. In contrast, if you go to the intercontinental highway, it will be much easier there!

Moreover, there is also the most need for mobile phones, because there is no phone at all!

Hearing the other party's proposal, Qin Guan also nodded. Sure enough, he played the role of general manager of a communication company. His mind was extremely flexible. He thought of a solution so quickly.

Originally, Qin Guan wanted to spread the system directly in their capital. In this way, they will certainly network all over the country and use their own system. When they upgrade later, they also have to turn to their own. In this way, they completely occupy their market and others can't intervene.

But now, the other party thinks of the intercontinental highway. In that case, just agree.

"That's OK," Qin Guan said. "If it's 100 kilometers, it takes at least five."

How far a base station can cover is a general problem. In later cities, there are few mobile base stations with high iron towers, because most of the base stations have become community systems.

In the urban area, due to the large traffic and many base stations, in order to prevent mutual interference between base stations and the capacity saturation of a single base station, the design coverage distance is generally about 100-200m, and even many are directly installed in the corridor. (see if there is anything like a mushroom head in your corridor. That's it.)

In the suburbs, because the traffic is relatively small, the coverage distance of a single base station is far, and generally can cover a radius of about 3km. As for those large tower base stations, in theory, a GSM base station can cover 35 kilometers.

Five are arranged, enough for use.