Unlike 3G and 4G, 5G will bring revolutionary changes. If 4G is faster, it is not a revolution. If 5G is faster, it is a revolution? I believe there will be many people who will feel this way or that about 5G. discussion, it is necessary to understand what 5G is.

If we want to describe what 5G is from technical details, we may need to wait until 2020, because by that time, after everyone quarrels, the international standard of 5G can be passed. This is the final and most detailed and scientific explanation of 5G. describe. However, now looking at the white papers on 5G from various countries, as well as the discussions and research on 5G by operators and the industry, I think the outline of 5G can basically be seen clearly, the direction has been clear, and the standards are just annotations to achieve this general direction.

What is 5G? I summarize 5G in four sentences: high speed, low latency, low power consumption, and interconnection of everything.

High speed. Based on 4G, the Internet speed can be increased 100 times, reaching 20Gbps per second. Many people will think, do we really need such a fast speed? Is such a fast speed useful? Of course, looking at 5G based on today's business requirements, this speed is really a bit wasteful, and we really don't need such a speed. However, we still remember when we transitioned from 56Kbps dial-up to ADSL, did we feel that we needed 10M or even higher bandwidth? At that time, we thought that such a fast speed was not necessary. Facts have proved that it is not only necessary, but also very necessary. Business will always develop. As long as the speed is reached, there will be corresponding business. We should never think that speed is unnecessary.

And the increase in speed is actually not only the user experience, the speed becomes faster, but also very valuable from the technical and industrial fields. Such high speed means that on the one hand, the spectrum utilization rate is greatly improved. , the use of the previously 20M spectrum may now be greatly improved, with stronger transmission capabilities. At the same time, the speed can reach 20Gbps, which means that our technology can utilize some spectrum that was previously thought to have no commercial value for mobile communications. Its value is like developing Taklimakan land to build houses. Turn some resources that are impossible to trade into something valuable. We all know the famous saying: wired resources are unlimited, but wireless resources are limited. That is to say, spectrum resources are insufficient. In fact, it is not that there is a shortage of spectrum resources. There is a large amount of spectrum. It is just that there are too few resources for us humans to use commercially. For a long time, the resources we can commercially use are below 2GHz, and higher frequency bands are difficult to use. But the development of communication technology is to make use of these resources bit by bit. When 3G first started to develop, a professor from Nanjing University of Technology believed that 3G could not develop because the spectrum was too poor based on backward theories. In fact, the spectrum used by 4G today has reached 3.5GHz. 5G will definitely utilize more spectrum resources, which means that human beings' ability to develop mobile communication resources has been greatly improved.

It is necessary to mention that the increase in speed will definitely be accompanied by a sharp drop in traffic fees. One day, it is not impossible for us to get 1G traffic for 10 cents, or even 1 cent.

Low latency. This may be an angle that ordinary users rarely care about. For user commands, the base station responds at the highest speed. Today, when a user connects to the Internet with his mobile phone, it may not be painful to wait for a while. Everyone accepts this feeling, and a few milliseconds or dozens of milliseconds may not matter. What 5G needs to do is to make this delay as small as possible, so that the base station processes user commands as quickly as possible and responds in the most timely manner. When using a computer to access the Internet, users don’t pay much attention to this problem. Waiting for a few seconds is nothing. When using a mobile phone to access the Internet, users don’t take it too seriously. Even when making a phone call, there is always a process of being connected. Waiting is a normal part of communication. behavior habits. However, for smart services after 5G, the requirements are completely different. Use it to support navigation. If the response is slow at an intersection, the user may just cross the intersection and turn around, which will take a long time. Especially in the intelligent transportation system, all vehicles are managed through the central control center. A one-second delay can result in a series of collisions. Therefore, low latency is a problem that 5G must solve.

Low power consumption. This year we have a large number of smart wearable products. The basic idea is to connect through a mobile phone, and then the mobile phone communicates with the base station and sends the data to the Internet. It is basically impossible for these products to be connected to base stations. Because today's base stations mainly deal with voice communications, even data is being made faster and faster, and it is natural that power consumption is high. However, it is impossible for future wearable products to have large batteries. In the absence of fundamental breakthroughs in power supply technology, these products need to establish new channels to communicate with base stations. These channels do not provide high speed, but can operate at low speeds. case, providing low-power data communication. This allows many products with low data volume requirements but high power consumption requirements to provide services.

Everything is connected. In an era with voice as the core, the number of links supported by mobile communications is very limited. Now China's base stations only support about 1.2 billion terminals, which means everyone has one or two terminals. In the 5G era, everyone may have one. With 5 or even 10 terminals, the number of devices linked to each base station will increase by 5 times or even 10 times. A large number of wearable products will be connected to the network. This means that device authentication, management, and billing will undergo tremendous changes in the future.

In the 5G era, the concept of surfing the Internet will be completely forgotten. Networking will be the norm, and a large number of wearable products will always be connected to the network and provide various valuable data. Become the foundation of the intelligent Internet.