Since 2018, the word 5G has become a popular keyword. In 2019, the 5G concept has once again caused heated discussion and focus in the market. So what step is 5G currently advancing in China? According to the information released by the 5G promotion group, at the technical test level, as of January 23, the 5G phase III test was basically completed, and the base station and core network equipment reached the pre-commercial requirements. In 2019, 5G enhancement and millimeter wave technology research and development tests will be launched. During the World Telecom Day on May 17 this year, a 5G temporary license may be issued, and a 5G official license is expected to be issued in 2020.

5G network is also the fifth generation communication network, its peak theoretical transmission speed can reach tens of Gb per second, which is hundreds of times the transmission speed of 4G network. The speed is as fast as an ultra-high definition movie in 1 second. Download completed. With the birth of 5G technology, the era of sharing 3D movies, games and high-definition video programs with smart terminals has come to us. As a fifth-generation mobile communication technology, 5G has the advantages of greater bandwidth, faster transmission speed, lower communication delay, and higher reliability. Relying on the birth of 5G, another popular field of artificial intelligence will also provide faster response, richer content, smarter application modes and a more intuitive user experience in the 5G era.

From the 2G in the 1990s to the 4G around 2010, the development of the communication industry can be described as a change in 10 years. When it comes to communication technology itself, it is necessary to talk about applications that come with this technology. The three characteristics of the 5G network are extremely high speed, great capacity, and extremely low latency. So what kind of potential applications will these three features bring to the world?

Extremely high efficiency

Based on the foundation of 4G, the starting point of 5G can be said to be extremely high. The most intuitive of the future 5G is for users to experience the high speed of the network. The goal of 5G will be 10GBps. What is the concept of 10GBps? The 10GBps full write is 10GBits bits per second, which means 10G bits per second. 1byte=8bits, then the actual rate of 10GBps=10/8=1.25GBps, and the download rate is 1.25G per second. In 4G LTE, the maximum frequency range of a single carrier is 20MHz. Carrier aggregation technology can be used to combine multiple non-contiguous carriers to achieve the highest rate, but this is not enough. One of the characteristics of 5G is the extremely high frequency, which is limited by the high-frequency propagation performance, so many high-band frequency resources are not used, which is exactly the resources that 5G can use.

5G networks mean ultra-fast data transfer speeds. In May 2013, Samsung announced that its upcoming 5G technology can transmit more than 1G of data per second. In contrast, a relatively fast LTE network can transmit approximately 60M of data per second, which is approximately equivalent to 0.05G. This wireless network will be much faster than any smartphone you experience. Google claims that even at 1G per second, it can take less than two minutes to download a full HD movie.

Great capacity

With the 5G layout, the Internet of Things has once again entered people's field of vision. Although the wide-area Internet of Things is still in its infancy, the commercialization of 5G also indicates that the Internet of Things will be hot. The power consumption problem has always been the biggest obstacle to the development of the Internet of Things technology, because there are too many nodes in the Internet of Things, and because of many conditions, the terminal has no way to charge. Only by first loading the battery, the terminal itself can save power. In order to solve this problem, 3GPP has specially introduced narrow-band IoT technology for wide-area Internet of Things. By limiting the rate of terminals, reducing the bandwidth used, reducing the transmit power of terminals, reducing the complexity of antennas, optimizing the physical layer technology, half-duplex makes the terminal Reduced power consumption. 5G will also go further on this basis, reduce the signaling overhead to make the terminal more power efficient, and use non-orthogonal multiple access technology to support more terminal access.

Very low latency

UAVs and robots can be said to be the best examples of low latency. The future vision is that the 5G delay is 1 millisecond or even less than 1 millisecond. Such a response can not be achieved by the current network and technology. The impact of low latency on drones, etc. can be said to be very important. Take the US Uber driverless car accident this year as an example, which is caused by excessive delay. The whole process of braking is like this. First, the radar transmits the signal to the passerby. The person reflects this signal back. After receiving the signal, the driverless car converts it into an electrical signal. The electrical signal is stored in the central processing system, and then stored. Take this signal for calculation, calculate the conclusion of the brake, and then pass this signal to the brake system. Under such a complex system, find the most succinct and fastest way to brake immediately when problems are found, only low latency can be achieved.

Broadband mobile communication has fully supported the development of China's mobile communications. The Ministry of Industry and Information Technology said that the next step is to promote the formation of a globally unified 5G standard, basically complete the research and development of chips, terminals and system equipment, and lay the foundation for launching 5G commercials in 2020. Achieved a leap from "2G follow-up" and "3G breakthrough" to "4G synchronization". China has built the world's largest 4G network, and is the first to propose 5G concepts and technology routes, and released white papers such as 5G wireless and network technology architecture. And started related technical research. With the development of time, 4G communication has become more mature, and the tariff has naturally become universally accepted by users. I believe that 5G as a milestone in the world communication industry will make people's lives more exciting.