Zhang Binghan quickly frowned and said: "However, Jinlan District is exactly the place where our city held the Machinery and Equipment Expo, where our mobile phones can actually receive signals from Ludong Province, sometimes standing at the door of our own homes to call home, the mobile phone call list shows that it is from Ludong Province, it was originally a local call has become a long-distance call, and there are many customer complaints." And what I'm talking about is just one problem of your system, there are still many problems, such as a high call drop rate, such as a high channel congestion rate, these problems must be solved by your Feixun Group as soon as possible. ”

Then, Zhang Binghan took the opportunity to explain the fault and explained the ins and outs of the fault and the measures they took.

When Zhang Binghan was talking seriously, Jiang Xinwei was thinking seriously.

After Zhang Binghan finished speaking, Jiang Xinwei asked him: "Zhang Gong, have you sent someone to investigate in Ludong Province? Is the transmission power of the wireless base station over there too large?"

Zhang Binghan cautiously replied: "After investigation, the transmission power of several wireless transmission base stations near Jintian City in Ludong Province is not large, and we deliberately reduced the transmission power of those base stations last night and increased the transmission power of several base stations here. ”

Jiang Xinxu sighed and asked, "How do several base stations here interfere with each other? Is it because the channels cover each other or the sector switches too frequently, or the signal strength fluctuates too much?"

Cold sweat broke out on Zhang Binghan's forehead, and he stammered, "This...... Because time is of the essence, we haven't figured it out yet. It may be that the signal strength fluctuates greatly, or it may be that the sectors switch frequently. ”

Several of Zhang Binghan's subordinates felt inexplicable, and they didn't know why their immediate boss was so nervous, they were simply like a great enemy.

Jiang Xinwei was obviously a little unhappy about Zhang Binghan's amateur answer, but he quickly thought of a possibility and asked, "Zhang Gong, don't you have a channel parameter tracker?"

Zhang Binghan asked in surprise, "Mr. Jiang...... Jiang Gong, what channel parameter tracker?...... We don't have this instrument. We now only have one comprehensive network signal analyzer. ”

"Oh-" Jiang Xinwei nodded a little helplessly and said, "I see." ”

Although Jiang Xinxu's Feixun Group has risen rapidly with pagers, mobile phones and telecommunications equipment, Feixun Group and surrounding enterprises lack technical background and have not yet fully grasped the systematic project of mobile communication networks. Even though Feixun Group has a lot of technical patents for CDMA98, it still lacks the ability to test the network, especially the wireless technical indicators, and there is no sophisticated radio test instrument and meter to carry out all-round, scientific and accurate diagnosis of the mobile communication network. Only selectively procure some instrumentation from Motorola to optimize mobile communication networks.

From this point of view, Feixun Group is still only an upstart, and Feixun Group can only be regarded as an electronic product manufacturer. It's just because Jiang Xinwei plagiarized a lot of cutting-edge technology in his previous life, covering up the fact that it lacks technical background.

Although the current Feixun Group can no longer be described as "a world-class technology information enterprise".

Jiang Xinwei thought for a while and asked, "Is there a big river or a relatively large lake between Jinlan District and Ludong Province?"

Zhang Binghan, who was not very familiar with the situation in Jintian City, was at a loss in his eyes, and looked at Sun Enzhu, a local, for help.

Sun Enzhu glanced at Jiang Xinwei and said in his heart: Could it be that this young boy's skills are higher than Zhang Binghan's? How could Zhang Binghan be so respectful to him, as if he was this kid's subordinate.

In order to solve the problem of his mobile communication network, he still replied seriously: "Yes! Jintian City is originally a city near the sea, with many lakes and many waters. Between Jinlan District and Ludong Province there is a Nam Xi Lake with an area of 13 square kilometers. This Jiang Gong, do you think that our drop of words and the reason for the passage of the area is because of this lake?

Jiang Xinxu replied: "Is it possible, I'm just guessing." You also know that a user who is talking from one channel sector to another channel sector, his phone must not be interrupted and carry out a smooth handover conversation, in the handover area must be repeated coverage of two or even more channel sectors, so that the system can switch the user from the channel of one sector to the channel of another sector, its call can be stable, so that the user can not perceive the change in call quality. However, if a foreign sector is suddenly inserted into this channel sector, and the signal of this foreign sector is unstable, it will definitely cause the call to drop. ”

Jiang Xinxu continued: "And this sudden insertion of the foreign sector can also explain why a person is sitting at home and dialing out a phone call is regarded by the system as a long distance. ”

Zhang Binghan hurriedly asked, "Then how did this foreign sector come in, and why is it unstable?"

Jiang Xinxu smiled and said: "It's because the signal of this sector is reflected by the lake surface, from Ludong Province, as long as the lake surface produces waves, this signal cannot be stable, and sometimes it may not be maintained for even a second." ”

Several people were surprised and asked, "Lake reflection?"

Jiang Xinxu nodded and said, "When the wireless signal is projected onto the surface of the lake at a special angle, it can be reflected, just like the light that we can see with the naked eye. ”

Sun Enzhu said: "What you said is too godly. …… Well, now we don't have the instruments to verify it for a while, so can you talk about how we can solve this problem?"

Considering that the digital mobile communication network is still a new technology and new equipment, even Zhang Binghan, who is in charge of technology, has no experience in this area, Jiang Xinwei directly said the solution, saying: "You can reduce the transmission power of the base station near Jintian City in Ludong Province, and change the transmission direction of the antenna at the same time." If it is an omnidirectional antenna, change it to a directional antenna. However, the transmission power cannot be reduced on the side of Jintian City, and the frequency of the cellular cells here will be chaotic anyway, so that the sectors will be muddy with each other. ”

Zhang Binghan asked a little weakly: "Jiang Gong, we will immediately send someone to Ludong Province to adjust the parameters of those base stations." …… In addition, we had planned to expand a few base stations here in Jinlan District, especially two low-power base stations around the place where the expo will be held, do you think it is feasible?"

Jiang Xinxu said: "It should be feasible. Is it just too late?...... If you only consider the problem of insufficient carrier frequency, I still recommend that you take emergency communication vehicles to solve it. ”

Zhang Binghan hurriedly said, "Okay." We will conduct a comprehensive analysis and solicit the opinions of the Jintian Municipal Telecommunications Bureau before coming up with an appropriate solution. ”

The next step is to verify the solution Jiang Xinwei said.

Zhang Binghan immediately called the engineers of Feixun Group, who was in charge of technical maintenance in Ludong Province, and asked them to adjust the parameters of several wireless base stations near Jintian City, while Jiang Xinwei watched Zhang Binghan test the relevant network parameters and observe the wireless signal situation in Ludong Province.

As we all know, repairing electronic circuits is far more unpredictable than repairing mechanical equipment. When repairing machinery and equipment, sometimes it is easy to see the faulty parts, and as long as the faulty parts are replaced with new parts, the faults can be eliminated in many cases. The electronic circuit is much more troublesome, not only the damaged electronic components can cause failures, many times the electronic components are good, but the parameters between each other are not suitable and easy to cause failures, and these faults are difficult to find, unless it is a very experienced person.

The wireless system is even more troublesome, if there is no precision instrument measurement equipment, it is difficult to find the cause of the failure, because you don't know where the problem is, and the electromagnetic waves in the air because of the terrain and landform, ground buildings caused by reflection, refraction, attenuation, frequency change or something, without high-precision measurement equipment, you want to find the problem is impossible to talk about.

Jiang Xinwei proposed his own solution, but not only did others not believe that the problem would be solved, but Jiang Xinwei himself didn't know if he could solve these problems, and he was only a little sure in his heart.

However, looking at the busy Zhang Binghan and others, Jiang Xinwei had a plan in his heart, that is, the development of measuring instruments and measuring instruments for digital mobile communication networks must be put on the agenda, and he must not think that he would deal with problems purely by brainstorming here.

He knows that the development of precision instruments and meters is more complicated than the development of digital mobile communication systems, and that it is necessary to develop digital mobile communication systems and build digital mobile communication networks, and it may not be possible to develop precision instruments for measuring the indicators of network systems, and it may not be possible to develop equipment for optimizing digital mobile communication networks, but no matter how difficult it is, it must be developed, which is an indispensable hardware for ensuring the normal operation of the network.

Jiang Xinwei is confident that he can solve the shortcomings in this regard, because he is not short of money now.

As long as there is no shortage of money, as long as there is a direction, he is not afraid that he will not be able to solve the problem. With money, you can hire a large number of excellent instrumentation experts, with money, you can buy relevant technical patents, and similarly, with money, you can cooperate with other enterprises, and those enterprises that have advantages in instrumentation research and development.

In fact, when Jiang Xinwei shared the CDMA98 standard with Qualcomm and Motorola, he intended to cooperate with these two companies in the field of wireless communications, which is bound to include wireless measuring instruments.

With the cooperation of these two companies, if you add the cooperation with Italian enterprises in this field, Jiang Xinwei believes that his goal will be achieved.

He was quietly working on a plan to develop wireless instrumentation.

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