Recently, Vice Minister of the Ministry of Industry and Information, Huai Jinpeng, said in an interview with the media that China has begun to lay out and prepare for 5G technology research and development and related needs. As soon as the news came out, many people who just tasted the 4G ultra-fast speed-speed sweet were expecting it. But there are also some doubts: from 2G, 3G, 4G to 5G, in addition to having higher speed and more stable signals, what technical breakthroughs? Frequent updates and replacements, consumers will not be connected, will it cause waste of resources? Imagine the future, what new communication technologies will enter our lives?
Is it faster?
Not only faster, low power consumption, low latency, low cost, high actual experience rate, etc. are the key to identifying 5G color
5G, the fifth generation mobile communication technology. Unlike 4G, 3G, and 2G, 5G is not a single wireless access technology, but a general term for a variety of new wireless access technologies and existing wireless access technologies. For the average user, the most concerned is the higher, faster and stronger network speed. Compared with the peak rate of 100Mb per second at 4G, the theoretical value of 5G will reach an astonishing 10Gb per second.
However, if 5G is only defined in speed, the gold content of this technology is reduced. Although there is no unified definition of 5G in the world at present, the industry generally believes that the 5G capability will not only be reflected in the Internet speed, but also low power consumption, low latency, low cost, and high actual experience rate. Key indicators of color.
Zeng Jianqiu, director of the Information Economy and Competitiveness Research Center of Beijing University of Posts and Telecommunications, believes that the development from 3G's 10 megabit bandwidth and 4G's 100 megabit bandwidth to 5G's 1000 megabit bandwidth is equivalent to changing from quantitative to qualitative, just like entering the 20 lanes from two lanes. Developed to 200 lanes. For example, the call is now audio-based, and there will be ubiquitous video calls in the 5G era to help people “face-to-face†communication.
The popularity of 5G may also bring about the unification of global communication standards. The communication standards of the 3G era include the EU leading GSM/WCDMA, the US leading CDMA and its subsequent evolution, and China leading TD-SCDMA; in the 4G era, there are two modes of China-led TD-LTE and European-led FDD-LTE. There have been a variety of different types of mobile phones, causing some trouble for consumers. Zeng Jianqiu believes that China initiated the development of the 5G standard in 2013, which is the main promoter of the 5G standard. It is very likely that the hybrid network will be implemented in the future, and the international community will standardize communication standards. Handheld mobile phones will be expected to travel all over the world.
At the Mobile World Congress held in early March, Ericsson, ZTE, Huawei and other manufacturers exhibited the latest research and development results related to 5G technology. The arrival of the 5G era will take time, but the development of technology research and standards has become the trend of the times. At present, the internationally set goal is that 5G will be commercialized as early as 2020.
Will it waste resources?
Each generation of communication technology can be backward compatible, base station upgrades do not have to start a new stove, old and new technology can share equipment
When 5G comes out, many people who are still using 2G networks can't sit still. After all, some people don't have a strong Internet connection, and mobile phones are just a calling tool for them. Others believe that the 4G network speed has been very fast, and will frequent replacements cause waste of resources?
"No", Zeng Jianqiu introduced, each generation of communication technology can be backward compatible, upgrade technology on the basis of the original base station, no need to start a new stove, new and old technology can share equipment, currently 4G can be compatible with 2G.
Relevant experts said that the launch of 5G is to meet the needs of the fast-growing mobile Internet and IoT business. Hu Houkun, vice chairman of Huawei, once said that the future 5G network will have as many as 100 billion connections, making "Internet of Everything" a reality.
Recently, the IMT-2020 (5G) promotion group jointly promoted by the Ministry of Industry and Information Technology, the National Development and Reform Commission and the Ministry of Science and Technology released the 5G concept white paper, which summarized continuous wide-area coverage, hot-spot high-capacity, low-power large connection and low-latency high reliability. 5G main technical scenarios. These four scenarios meet the complex needs of communication for different users and different industries.
Continuous wide-area coverage will meet the needs of users who can still access high-speed Internet in harsh environments such as remote areas and high-speed mobile. Hotspots and high-capacity mainly satisfy the extremely high network speed in areas where personnel are dense and traffic demand is high.
The low-power large connection is mainly for smart city, environmental monitoring, intelligent agriculture, forest fire prevention and other application scenarios targeting sensing and data acquisition. It has the characteristics of small data packet, low power consumption, low cost and massive connection. Low latency and high reliability are mainly for the special application requirements of vertical industries such as car networking, driverless, industrial control, etc. These applications have extremely high requirements for delay and reliability, and need to provide users with millisecond-level end-to-end. Delay and close to 100% business reliability guarantee.
What new technologies are there?
Quantum communication, visible light communication technology, etc. will continue to expand human communication methods
The ever-changing communication technology is amazing. From 2G to 5G, humans overcome the limitations of time and space and greatly increase the rate of information exchange. According to Zeng Jianqiu, in the current communication technology, in addition to the 1G to 5G mobile communication technology, there are also LAN technologies such as WiFi, and the communication satellite can support remote areas. "In the future, new technologies such as quantum communication will greatly expand the way humans communicate." Zeng Jianqiu said.
In the era of mobile Internet, national military secrets, trade secrets, and personal privacy are facing new challenges, and there is an increasing demand for communication technology. Quantum communication has received universal attention from the global scientific and technological community and its industry for its absolute security, large channel capacity, ultra-high communication rate, long-distance transmission of information and high efficiency. This technology uses quantum entanglement effect for information transmission, and has almost no possibility of eavesdropping and cracking. It has broad application prospects in both military and civilian fields.
At present, China is in the forefront of quantum communication technology, and has begun pilot projects in the construction of quantum communication networks in Hefei and Jinan. According to China's quantum communication research and development, promotion plans, Beijing, Shanghai and Xinjiang Urumqi and other cities are gradually grasping the construction of metro quantum communication network.
Visible light communication is quite amazing for many people. A technology called "Li-Fi" in Scotland has surprised many people. This technology uses visible light instead of traditional radio frequencies, converts data into LED bulbs, flickers and transmits signals at hundreds of millions of times per second; at the same time, as long as the Li-Fi receiver is set up on a computer or mobile device, The data stored in the LED bulb can be decoded to establish an internet connection. It is understood that in 2013, Fudan University announced the successful implementation of this technology in the laboratory, the average Internet speed reached 150Mb / s.
This technology has unique advantages in special environments such as airplanes and hospitals. Because the characteristics of the light determine that it cannot penetrate the wall of the light barrier, it can avoid the interference of electronic signals on the precision equipment in the aircraft and hospital. Although the technology is still in the laboratory stage, many people are optimistic about its application prospects.
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