The 5th Generation Mobile Communication Technology (5G for short) is a new generation of broadband mobile communication technology featuring high speed, low latency and large connection, and is the network infrastructure for realizing the interconnection of human, machine and things.
The International Telecommunication Union (ITU) defines three major application scenarios for 5G, namely enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (uRLLC), and massive machine type communication (mMTC). Enhanced Mobile Broadband (eMBB) is mainly for the explosive growth of mobile Internet traffic, providing mobile Internet users with a more extreme application experience; ultra-reliable and low-latency communication (uRLLC) is mainly for industrial control, telemedicine, and autonomous driving. The application requirements of vertical industries with extremely high requirements for reliability and reliability; Massive Machine Type Communication (mMTC) is mainly oriented to the application requirements of sensing and data acquisition such as smart cities, smart homes, and environmental monitoring.
In order to meet the needs of diverse application scenarios of 5G, the key performance indicators of 5G are more diversified. The ITU defines eight key performance indicators of 5G, among which high speed, low latency, and large connections have become the most prominent features of 5G. The user experience rate reaches 1Gbps, the latency is as low as 1ms, and the user connection capability reaches 1 million connections/square kilometer. In June 2018, 3GPP released the first 5G standard (Release-15), which supports 5G independent networking and focuses on enhancing mobile broadband services. In June 2020, the Release-16 version of the standard was released, focusing on supporting low-latency and high-reliability services, and realizing support for applications such as 5G Internet of Vehicles and Industrial Internet. The Release-17 (R17) version of the standard will focus on implementing differentiated IoT applications and achieving medium and high-speed large connections. It is planned to be released in June 2022. On April 8, 2020, China Mobile, China Telecom, and China Unicom jointly released the “5G Message White Paper” with 11 partners. The three major operators plan to launch 5G messages in 2020.
Today is the era of smart phones and tablet computers, and their appearance also stimulates the development of mobile communication technology to a certain extent. 4G technology has entered people’s lives in an all-round way, but under the circumstances that people put forward higher requirements for communication technology, 5G technology has gradually developed on the basis of 4G technology. 5G has not only greatly improved speed and security, but also improved some of the shortcomings of 4G technology. The development of 2G, 3G, and 4G mobile communications has laid the foundation for the rise of 5G technology. Although 5G technology covers many aspects of knowledge, the most critical part is wireless transmission technology and wireless network technology.
Multi-carrier technology in wireless transmission technology can split the channel into carrier signals of multiple orthogonal sub-channels, and then modulate multiple carriers by using sub-data to improve spectral efficiency. Wireless transmission technology can improve spectral efficiency, allowing signals in two different directions to be transmitted on one physical channel. In other words, the signal from the transmitter is eliminated on the receiver to avoid interfering with it, and then the signal from the same frequency is received at the same location as the transmitter signal, thereby improving spectral efficiency and making the network more stable.
The Ministry of Industry and Information Technology issued 5G licenses to China Mobile, China Telecom, China Unicom, and China Radio and Television, marking China’s official entry into the first year of 5G. According to the data released by the Ministry of Industry and Information Technology, there are currently 335 million 5G mobile terminal connections and nearly 850,000 5G base stations in China, forming the world’s largest 5G independent network. In response to some people’s claim that “5G base stations are denser and have higher radiation values”, China Telecom recently conducted related popular science through social platforms.
Officials said that the improvement of 5G network speed is not achieved by increasing the transmission power of base stations, but by expanding bandwidth, improving anti-interference ability and receiving sensitivity.
At present, my country has built 847,000 5G base stations. As of the end of April 2021, 1.236 billion end-users of the cellular Internet of Things have been developed, of which 17.8% are end-users used in smart transportation.
In the past few days, Mr. Dong from Guizhou is enjoying a leisurely travel time. He has “checked in” to Urumqi, Ili, Kashgar, Xinjiang, and Lanzhou, Gansu. He has enjoyed the snow-capped mountains, the sunset, and tasted baked buns, spicy chicken, and beef. Ramen and other delicacies. But there is also a bit of “annoyance” in happiness. Due to the long distance, he has to take a long flight and find ways to pass the time in “airplane mode”.
“There is no network on the plane, so I get bored after sitting for a long time. Sometimes I sleep or read e-books. It would be nice if there was also a 5G network on the plane, so that everyone could enjoy watching dramas and movies.” Mr. Dong Say. In fact, many people have this idea.
A few days ago, the Civil Aviation Administration of China released the “China Civil Aviation New Generation Aviation Broadband Communication Technology Roadmap”, clearly focusing on promoting the international standardization of 5G and other new generation communication technologies in the civil aviation field, and realizing airborne broadband wireless communication, cloud computing, artificial intelligence, The combination of information security technology promotes the coordinated application of air and ground, and provides various flight information transmission and exchange services for aircraft.
At the same time, operators are also taking action. At present, China Telecom has started the construction of 5G ATG network, and plans to complete the network construction in the third quarter of this year, to achieve national airline network coverage, airborne equipment synchronously complete airworthiness, and the peak bandwidth of a single aircraft is as high as 1Gbps, allowing passengers to enjoy 5G at an altitude of 10,000 meters. High-speed Internet experience.
According to the forecast of the 2021 smartphone shipment report released by Canalys, a world-renowned analysis company, the global smartphone market will grow by 12% in 2021, and shipments will reach 1.4 billion units, of which 5G mobile phones will account for annual shipments. 43%, 610 million units.
On June 26, according to media reports, China Telecom has started the construction of 5G ATG network and plans to complete the network construction in the third quarter of this year. The peak bandwidth of a single aircraft will be as high as 1Gbps, allowing passengers to enjoy 5G high-speed Internet access at an altitude of 10,000 meters. With the popularity of 5G mobile phones, 5G network coverage has also accelerated, and 5G networks will also be able to be experienced on planes.
5G commercialization has been developing rapidly for more than two years. 5G mobile phones, which were classified as cutting-edge technology terminals two years ago, have been widely popularized and are in a state of continuous growth.
The popularity of 5G is gradually rising. As a next-generation mobile communication network, if there is one keyword to describe 5G, it is “fast”.
5G will not only greatly change people’s existing way of life and work, improve communication efficiency, but also increase the possibility of many cutting-edge technologies and products being implemented.
5G affects the nerves of many enterprises, enough to change the pattern of the mobile communication industry, and even involve national interests.
We have seen that foreign companies such as Qualcomm, Intel, etc., national enterprises such as Huawei, ZTE and Lenovo, as well as major telecom operators, are actively deploying 5G, trying to seize the first opportunity in the 5G landscape and obtain maximum benefits.