At the end of the year, Su Yan also received an invitation letter. As wimax was hyped by many companies, many regions took sides, especially those in Wanwan who made a desperate move.

It is impossible for China to say that there is no reaction. After all, this is a situation that may change the structure of the communications industry. China, which has suffered a lot because it failed to catch up with the rapid technological change many times, now does not want to miss any technological changes easily.

Opportunities for change.

Therefore, an unusual meeting jointly organized by the Ministry of Science and Technology, the Ministry of Information Industry, the National Development and Reform Commission and other departments convened the five major domestic operators, representatives of many enterprises, and experts in related fields to discuss the future situation of wimax and its impact on China.

the impact caused.

It also depends on how China should decide in the face of the current situation.

The meeting was also full of different opinions. Some people felt it was necessary to keep up, and some people were worried that this was a trap set by the other party. In addition, the current domestic communication construction is changing from 2g to 3g, and there is no extra energy for wimax.

The investment is too big.

After all, if you really want to keep up with the progress of wimax in the West, you not only have to join the wimax forum, but also invest a lot of resources.

The first is the five major operators, because the needs of the five operators are actually different at this time, so the needs for wimax technology are also different.

Judging from today's statements, China Telecom, China Netcom and China Railway are all supportive, especially China Railway. Because China Railway only has broadband business and no mobile network business, China Railway wants to rely on wimax to enter the game.\

After all, although in the final analysis they are all doing things for the country, different businesses also have an impact on the status they bring, and it is inevitable that some people will take this opportunity to have some thoughts.

Neither China Unicom, which uses the European 3G standard, nor China Mobile, which uses the Chinese 3G standard, have much interest in wimax.

For China Unicom and China Mobile, whether it is the European 3G standard or the Chinese 3G standard, they have invested a lot of resources. Now they have begun trial operation. Suddenly a Wimax pops up. Even if they want to, they don't have that much.

resources and energy to try.

The most important point is that although Wimax is claimed to be 4G, it has not been tested. What if it doesn't work? It's better to hold 3G firmly in your hands first. This is also the thinking of many conservatives.

In addition to several major operators arguing with each other for their own interests, experts and scholars participating in the meeting also expressed their opinions one after another.

There is a huge debate about wimax not only among operators, but also among experts and scholars.

The experts who can attend such meetings are naturally not comparable to the experts on the Internet who are trying to sell themselves on others. Basically, they all have real skills.

Represented by Ms. Cao Shumin, a great expert in the field of Chinese communications, they are not optimistic about wimax.

And this great master is now the deputy director of the Telecommunications Research Institute of the Ministry of Information Industry. He is also the technical deputy chief engineer of the national major science and technology project "New Generation Broadband Wireless Mobile Communication Network", a member of the National Informatization Expert Advisory Committee, and the State Council Three Network Integration Expert Group

Member, member of the State Council Anti-Monopoly Expert Group, Vice Chairman of China Communications Standardization Association, leader of the TD-LTE working group of the Ministry of Industry and Information Technology, leader of the 4G Promotion Group, etc.

It can be said that he is still very authoritative in the technical field.

"Judging from the current data provided by Intel and related companies and research institutions, wimax technology seems to be quite mature, but if it is said to be a 4G development, in my opinion it can be said to be quite immature.

, not only does it not have the most basic standards and specifications, but even other supporting equipment and billing operations are immature. Netcom has done wimax technology experiments. It should be clear that after the entire wimax project, there is not even a basic solution. If

If you follow up rashly, once Wimax is proven to be unable to be popularized on a large scale, who will be responsible for the resources and time invested in the early stage!"

A group of experts who support the research and development of wimax also put forward a different view, "Yes, I admit that the current wimax is still a bit immature in various aspects, but how to explain that 3gpp's LTE has proposed corresponding solutions for low-mobility broadband access?"

requirements, including similar bandwidth, data rate and spectrum efficiency indicators, optimization for low mobility, etc.

And we can see that the technical route of LTE is actually very similar to that of Wimax. In terms of wireless interfaces, they both use sc-fdma for uplink and ofdma for downlink. In terms of network structure, nodebs are directly connected to the packet network to simplify

Network levels, etc.

We in China are currently promoting the TD-solution, but currently it seems that our solution is difficult to pass the European test. In this case, why don't we just choose Wimax, which may be commercially available on a large scale next year?

We must know that wimax has a lot of room for development. First of all, it has better broadband mobility in a wider range and has a strong ability to provide mobile broadband data services, which will definitely bring a better experience to mobile users.

, thereby stimulating the development and improvement of the network.

And the most important thing is that wimax can be applied in the last one kilometer connection, network backhaul and private network, etc., which can well solve the problem of low-cost broadband access in remote areas. Using wimax technology to realize metropolitan area wireless access

Broadband coverage can quickly expand the user base, improve the level of information services and applications, and will play a huge role in promoting the comprehensive informatization in our country!"

Obviously, from the perspective of those who support wimax, once China can use wimax, it will undoubtedly usher in a qualitative leap in comprehensive informatization construction.

"The key question now is that even if wimax can promote informatization construction to a certain extent, what should we do in the next stage? Although wimax technology is considered by Intel and some members of the wimax alliance to be 4G, we all know that it cannot become 4g at all! What?

Is it 4G? That is the fourth generation of mobile communication technology. Since this is the case, the revolutionary significance of 4G cannot and should not be reflected only in the access layer. It should also be reflected in the comprehensive technical system such as switching, control, business and qos.

breakthrough.

This is also the biggest difference between them. If a certain communication technology is relatively innovative only at the access level, I cannot accept the statement that this is the next generation of mobile communication technology.

And you can take a look at wimax's technical white paper. All the contents are aimed at how to solve the problem of wireless high-speed data access at the access layer. As for how to route and control the data after it is uploaded, wimax does not handle it.

By the way, a very practical question. Judging from our domestic development foundation, the frequency bands allocated to wimax internationally are generally 2.5ghz and 3.5ghz. And these frequency bands have been allocated in China. In other words, if wimax is used

We need to consider the issue of domestic frequency bands!”

"Strictly speaking, WiMAX is not a mobile communication system standard, but a wireless metropolitan area network technology!"

It can be said that experts on both sides come and go. The most important thing is that both sides have quite a lot of theories to support their own views.

The leaders didn't know who to listen to. After all, there wasn't much they could do about this kind of technical issue.
Chapter completed!