Is 5g advanced technology? As early as the beginning of 2019, this issue has caused great controversy. At that time, some communication experts asserted that 5g would be a completely failed communication technology, because it is neither advanced nor mature! It has carried on the thorough analysis from two aspects, one is the technology, the other is the demand.

In terms of technology, most of 5g technology has not been updated (modulation and OFDM). Even the loudest massive MIMO technology has been used before, and it can also be applied in 4G network (multi sector). In a word, 5g technology has no breakthrough improvement compared with 4G, not to mention progress.

In terms of demand, 5g has no market for its large bandwidth, high speed and other characteristics, because people’s demand for the network may basically be met through 4G and WiFi, while the demand for industrialization is met by dedicated lines. 5g mobile network, as a civil standard, is difficult to meet the demand for industrialization. All in all, 5g doesn’t work.

With the increasing speed and enthusiasm of domestic 5g promotion, and the higher level’s attention to 5g technology, 5g has become more and more a political project. In this background, the sound of pouring cold water on 5g gradually disappeared. Until recently, the construction of 5g network has reached a certain scale. Some “strange phenomena” in the development of 5g make the “5g useless theory” rampant again.

There are many strange phenomena, such as the debate over whether 5g is true or false, for example, 5g package users far exceed the sales volume of 5g terminals, for example, 5g base stations are shut down regularly to save electricity charges, and so on. Especially the last one, the energy consumption of 5g base station is so huge that operators have to take unconventional measures (such as power off) to save electricity charges. As a result, the debate about whether 5g is an advanced technology has become increasingly fierce.

Is 5g an advanced technology? Let me talk about my point of view.

Let’s talk about technology first.

To be sure, from the perspective of current 5g network technology, it seems that there is not much breakthrough and essential upgrade compared with 4G. Its underlying technology and working principle are the same as the original one. From the perspective of pure communication technology, the innovation is indeed slightly insufficient.

However, from 2G, to 3G, to 4G, mobile communication technology has been inherited and upgraded generation after generation. It is not said that the technology of that generation has completely broken away from the original technology paradigm and revolutionized the principle of communication. 5g is no exception.

What we need to see is that 5g puts forward many key performance requirements, such as user experience rate (0.1-1g on average), end-to-end low latency (1ms), mobility (500km / h) and connection density (one million per square kilometer), which can not be achieved on 4G.

Some people may say that 4G can also achieve the target of rate capacity by carrier aggregation. However, to achieve such a high rate capacity, how many blocks need to be added to the existing carrier frequency, whether the existing frequency band can meet such a large capacity expansion demand, how to solve the interference and other problems, whether the equipment supports capacity expansion, and so on, there will be many outstanding problems, It’s not as easy as we think. It’s estimated that it’s easy to do one or two stations, but it’s not very realistic to do it on a large scale.

Some people will suggest that the spectrum is not so large, I can use other high frequency band to achieve. Yes, it can, but it needs new equipment, and the coverage of different frequency bands is different, so it needs to be re planned. It is not advisable to invest so much money just to increase capacity.

The end-to-end delay is so low that it is absolutely impossible for the existing 4G network, even for the new modules. In terms of mobility, it is now able to achieve 350km / h, but the quality and speed of Tonghua is not high.

4G can’t do this, but 5g network can do it. That’s progress. With this result, we can do 5g network. We should not think too much about promoting the progress of social science and technology. We should also consider the overall consideration at the national level.

Others say that what about the power consumption of 5g? Such a serious power consumption will lead to a severe test for its large-scale construction and deployment, and the rich operators may be dragged down by the 5g electricity charges. From the problem of excessive power consumption, we can conclude that 5g is not an advanced technology.

In fact, although we can see from many reports and analysis data that the absolute power consumption of 5g base stations is increasing, they all ignore that the energy efficiency ratio of 5g is much higher than that of 4G. In short, with the same power consumption, the information capacity transmitted by 5g will be dozens of times that of 4G, and the power consumption per bit of data will be greatly reduced.

For example, a 5g base station can download more than 5000 super clear movies per kilowatt hour. In the 4G era, the same power can only download less than 200.

Let’s talk about the application.

Many people doubt that 5g has been commercial for more than half a year, and the construction scale of 5g network has reached more than 400000 stations, but so far there has not been mature and large-scale application of 5g network, let alone killer application that has changed the world. Based on this, we can deduce that 5g has not much market demand at all. This kind of technological progress is a kind of “pseudo progress”. Some people even compare 5g to a new “iridium project” and are doomed to bankruptcy.

Needless to say, 5g network is not only for ordinary users to surf the Internet, make phone calls and watch videos, but also for industrial automation, driverless, VR / AR, smart home, massive Internet of things and other industries to enhance the national scientific and technological strength in all aspects.

Before, when operators built 5g base stations, 5g standard only completed the first phase of standard (R15) freezing. R15 standard is a basic version of 5g, which only solved the enhanced broadband scenario (embB) in the three scenarios of 5g. Therefore, many operators even built 5g in the way of NSA, just to achieve faster network speed.

Analyze whether 5g is advanced technology from two aspects of technology and application requirements

In the past July, 3GPP announced the formal freezing of R16 standard, marking the completion of the first evolution version of 5g standard. R16 standard has deployed ultra-low delay and high reliability communication scenario (urllc) and mass machine communication scenario (mmtc), both of which are for the application scenarios of Internet of things. Low delay and high reliability are mainly used in special industries such as Internet of vehicles, industrial control and telemedicine. Mass Dalian connection is also mass Internet of things, which can promote vertical industry integration.

After the completion of R16 standard, the Internet of things related industries will undoubtedly usher in a good opportunity to accelerate the development, and many industry applications will emerge as the times require.

Therefore, maybe we should not insist on discussing whether 5g is an advanced technology. After all, the story about 5g changing the world is just beginning.

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