Chapter 451

"Ladies and gentlemen, the exciting time has come. Today is a great time to verify the practical application of our CDMA network!!" in the conference room of the hotel in block 1 of Hong Kong, dozens of foreigners, some local officials and some local journalists showed excited expressions on their faces.

These dozens of foreigners are technicians from Qualcomm group in the United States. In addition, Owen Jacob, chairman of Qualcomm group, today is a very important day for Qualcomm group, because Qualcomm group has worked hard to develop CDMA communication network for four years. On this day, it is finally going to start regional experiment.

CDMA communication network is a wireless mobile communication network based on CDMA technology, that is, the communication network of mobile phone.

To put it simply, it is a mobile phone signal based on CDMA signal.

Qualcomm has arranged 18 signal transmitters in the whole port in a month, basically covering the whole Causeway Bay area.

The purpose of the experiment is to verify whether the CDMA network can operate normally and how stable it is.

The test method is also very simple. Qualcomm group has arranged more than 200 staff holding CDMA network chip mobile phones to distribute them in various locations in Causeway Bay, and then let them call each other. As long as the voice of the two sides can maintain a high degree of stability and carry out a certain amount of high-capacity signal transmission, Even if the CDMA network operation experiment is successful, the CDMA network will also be approved by the Ministry of information industry of the United States and officially obtain the qualification for listing and operation.

This is undoubtedly very important for Qualcomm. As long as this experiment can pass, CDMA can obtain the market access certificate. At the same time, CDMA network can also be proved to be a network that can be used in reality.

More importantly, they have negotiated with relevant officials of Hong Kong and Hong Kong. As long as this experiment is passed, Hong Kong and Hong Kong will become the first region in the world to install CDMA communication network. Qualcomm's first CDMA business is also negotiated.

Qualcomm has worked hard for four years to realize the technology, instead of burning investors' money as in the previous six years.

In short, as long as the experiment is successful, Qualcomm can make money.

So at this moment, all members of Qualcomm group are very excited,

"Chairman, it's 9:00 a.m., it's time!" Owen Jacob's secretary whispered. Owen Jacob nodded ruddy and said to his more than a dozen technicians, "start the CDMA signal base station!"

"Yes! Start the CDMA signal base station!!" more than a dozen technicians pressed the button in their hands at the same time. The whole scene is very sci-fi, as if they can control the base station several kilometers or even more kilometers away through this button.

But in fact, Qualcomm staff have long been there near the power controller of these base stations, and they don't need to wait for the phone.

They just looked at their watch and sent power to the base station as soon as 9:00, and then the 18 base stations began to work.

"Chairman, please call the experimenter!" the Secretary said excitedly, while Owen Jacob waved his hand and gave the phone to an official in the nearby port. "Let Mr. Lin come first. You can make this first call, which is the first mobile phone broadcast through CDMA network in the history of the world!"

"OK!" Mr. Lin blushed. Thinking that he might record human history because of this phone, he was very excited and picked up the cell phone in Owen Jacob's hand.

"There are 200 different phone numbers written here. You only need to enter one of them and you can talk to any of the 200 experimenters!" Owen Jacob took out a document full of phone numbers and handed it to Owen Jacob.

The phone numbers in this document are all 4-digit phone numbers, which is really the first batch of mobile phone numbers based on CDMA in the world!

"2233!" in excitement, Mr. Lin dialed one of the most interesting numbers.

"Doodle!" a familiar sound, the phone successfully dialed out, and other faces around suddenly showed an expression of great expectation, looking forward to the moment when the experimenter at the other end of the phone connected the phone.

But the problem is that the phone makes such a beep, and then there is no sound. Finally, it even makes a squeaky current sound from the microphone.

"It's all right... It takes a little time to connect the signal at the beginning..." Owen Jacob's expression was a little stiff, but he forced to explain, but after waiting for a full minute, no sound came out, but the zizizi current sound became louder.

"Damn it, the mobile phone can't connect to the base station at all. Is there a problem with signal reception?" Owen Jacob, as a technical chairman, is naturally very clear about the equipment he has personally developed. As long as he hears the sound from the mobile phone, he can judge where the problem is.

"Sorry, there may be a problem with base station 12. I'll send someone to repair it!" Owen Jacob said quickly. Then he took out the walkie talkie with an iron face, adjusted the channel, and gave orders to the staff in charge of base station 12 to repair and adjust the base station immediately.

"Yes! Let's go now!" the staff stationed at base station 12 immediately rushed to the top floor, directly disassembled the base station and began to concentrate on finding the problem of the base station.

It was at this time that the security guard standing at the top floor only stared at the flag at the top of the Jinlong Building in the distance, and suddenly found that the color of the flag changed from green to red.

So he put his hand into his kit and closed the open switch.

"What should I do? I can't find out the problem!"

"Yes! There is no problem!"

After checking for a long time, the two maintenance engineers did not find any problems. They had to unplug the power, restart the base station, and then reply to Owen Jacob to let them try again.

"Let's try again!" Owen Jacob said with a stiff expression. Mr. Lin was embarrassed to dial the phone again, but this time it seemed that it was really repaired. The phone was successfully dialed, and a person's voice came out of the mobile phone. At the same time, he complained, "why did you call for so long? It's more than ten minutes late!"

Owen Jacob was not angry with the experimenter because he was relieved. It seemed that it was just a small problem and now he finally succeeded.

Mr. Lin also began to talk with the experimenter and asked him some information. When everything was getting better, Owen Jacob didn't find that the flag at the top of Jinlong building nearby changed from red to green.

Then there was a squeak. Just now the call was going on smoothly, and the call hung up instantly, which turned into a squeaky and disconnected state again.

Owen Jacob's face was livid. At this time, the staff responsible for communicating with 200 experimenters with walkie talkies sent a report saying that in fact, some experimenters can get through the phone, and most experimenters can't get through the phone.

"Repair, repair the base station quickly!" Owen Jacob said angrily. The engineers at hand had to repair the base station again. As a result, some base stations returned to normal, but some base stations couldn't work normally, and some base stations stopped from time to time.

In a word, the CDMA network is extremely unstable, all kinds of disconnection and dropping, and signal failure will occur from time to time. The whole network is unable to work for about half of the time.

By the way, many times engineers can't find the problem, but generally, as long as the power is restarted, the machine can be restored temporarily, but after a period of time, the problem will reappear.

In the eyes of professionals, this is entirely because the communication base station and CDMA communication technology network itself are very unstable, as well as the internal circuit design is unscientific, and various electronic components do not match, so that power failure and power on will be normal, and then fail after a while.

This set of equipment is full of technical defects and can't afford the communication task of a big city.

"Mr. Jacob, it's getting late. We have other work to do, so let's go first!" Mr. Lin said with a little apology, and then left directly with a vote of government officials. The reporters at the scene were crazy flashing flash lights and taking pictures. Even the gray face of the president of Qualcomm was clearly photographed.