5G, narrowly speaking, refers to the radio access network technology of the fifth generation mobile communication technology; in the broad sense, it refers to the fifth generation mobile communication technology, which refers to the complete technology including the radio access network, core network, and related support systems. system.
According to the European Union’s “METIS†project in the 2020 Information Society, 5G is to build a long-term network society through the evolution of existing wireless technologies and the development of complementary new technologies, through the integration of multiple wireless connections. Into the technology, to provide the ultimate experience to meet the different needs of users, is a generic term for a variety of new wireless access technologies and existing wireless access technology integrated solutions, is a truly integrated network. In the future, 5G will infiltrate all areas of society and build a comprehensive information ecosystem centered on users. By providing users with ultra-high access rates, zero-latency experience, and 100 billion device connectivity, Super The consistent service of multiple scenarios such as high traffic density, ultra-high connection density, and ultra-high mobility finally realizes the vision of “information to heart, everything is a tentacleâ€.
5G key performanceThe basic performance of 5G can be summarized as "6+3". That is, 6 function indicators + 3 efficiency indicators, and 6 function indicators include: user experience rate, connection number density, end-to-end delay, traffic density, mobility, and peak rate. In different application scenarios, such as virtual reality, ultra-high definition video, cloud storage, and car networking, the requirements for six functional indicators are not the same. The three efficiency indicators include: spectrum efficiency, energy efficiency, and cost efficiency. Compared with 4G systems, the basic performance of 5G systems has been greatly improved, spectrum efficiency has been improved by 5-15 times, and energy efficiency and cost efficiency have been improved by more than 100 times.
The iconic capability indicator is "Gbps user experience rate." A set of key technologies include large-scale antenna arrays, ultra-dense networking, new multiple access, full spectrum access, and new network architectures. Large-scale antenna arrays are one of the most important technical means for improving system spectral efficiency, and will play an important role in supporting the capacity and rate requirements of 5G systems. Ultra-dense networking can achieve 100-fold capacity by increasing the deployment density of base stations. Upgrading is one of the most important means to meet the demand for 5G thousand times capacity growth; the new multiple access technology enhances the access capability of the system by sending signals in superimposed transmission, which can effectively support the connection demand of 100 billion devices for 5G networks; full spectrum access Technology can effectively alleviate the huge demand for spectrum resources from 5G networks by making effective use of various spectrum resources. New network architectures based on advanced technologies such as SDN, NFV, and cloud computing can achieve user-centricity that is more flexible, intelligent, efficient, and open. 5G new network.
5G's seven new features1. Telemedicine
In addition to the speed of flight, the biggest advantage of 5G is the network's low latency. In the 4G era, although it is not easy to notice, the network delay phenomenon still exists. However, in the 5G era, the odious Caton will be completely eliminated, which means that even if the doctor is not in the ward, he can easily perform surgery.
Ericsson has done a telemedicine demonstration with doctors at startups NeuroDigital Technologies and King's University London. The entire operation requires only one more VR headset and a pair of special gloves. In the operating room, the machine is controlled by gloves. The arm will replace the doctor's hands.
This pair of gloves is equipped with a tactile feedback engine that can give doctors the most realistic touch.
2. Sensual Internet
In addition to doctors, 5G can also enable experts from all walks of life to remotely solve some difficult problems in the local area. I tried the Ericsson car simulator. Through the tactile vibration of the seat, you were like a ride in a scenic area that was several tens of kilometers away. Some of the fine bumps on the road were conducted through the seat to you.
"In order to feel the signals coming from far away in real time, we need ultra-low latency," said John Sol, chief technology officer of Sprint. 5G will also be used in the industrial field in the future, including allowing people to monitor the robot's work in real time.
In the interview, Woolf, chief technology officer of Ericsson, said that the arrival of 5G means that the network for the first time surpasses the speed of human thinking.
3, automatic driving car
Although companies such as Google and Tesla have achieved great success in autopilot, industry experts generally believe that without full support from 5G networks, Level 5 full-automatic driving will not be realized.
The reason for this is simple. Without the bandwidth and speed provided by 5G, the data collected by self-driving car sensors cannot be exchanged between vehicles, and the communication between cars and cars cannot be realized.
Adams, vice president of Verizon, said: "The autopilot system is very complicated. Apart from cars, 5G and urban design are very important."
4, drones
Some people may say that we did not play drones long ago? There is no 5G now. This is true, but the arrival of 5G can unlock the real strength of the drone. Intel’s director of market development, CommScope, said that the 5G network allows the pilot to achieve ultra-precise control of the drone, and the image transmission effect will be more clear.
5, virtual reality
Last year's MWC, VR has become a beautiful landscape. Although there are not many new products this year, but manufacturers have found a new way to enhance the VR experience with 5G, users are no longer trapped in their virtual world, you can pass High-speed networks chat with others in real time and even experience their lives directly.
6, stable connection
Although the speed of the 4G era can meet the requirements of watching live broadcasts in real time, the signal coverage problem always causes people to miss the exciting moments, and 5G will solve the problem once and for all, and for businesses and applications that rely on the Internet to eat. This news is even more exciting.
With 5G technology, the network can intelligently adjust the strength of the user's received signal to ensure smooth connections. But perfect service also has a price: high prices.
7, home broadband
The arrival of 5G also has an important role, that is, your home's normal broadband can be retired, and the 5G network's Gigabit speed can meet all your requirements for the network at one time. In addition, you do not need to wait until 2019 because some operators have already started testing.
5g system overall architectureThe 5G technology innovation mainly comes from wireless technology and network technology. In the field of wireless technologies, technologies such as large-scale antenna arrays, ultra-dense networking, new multiple access and full spectrum access have become the focus of attention in the industry; in the field of network technologies, software-defined networks (SDN) and network function virtualization ( The NFV)'s new network architecture has achieved widespread consensus. In addition, filtering-based Orthogonal Frequency Division Multiplexing (F-OFDM), Filter Bank Multi-Carrier (FBMC), Full Duplex, Flexible Duplex, Terminal Direct (D2D), Multiple Low Density Parity (Q-ary LDPC) Code, network coding, polarization codes, etc. are also considered as important potential wireless key technologies for 5G.
1,5G research will focus on user experience while advancing technological changes. The average throughput rate, transmission delay, and support capabilities for emerging mobile services such as virtual reality, 3D, and interactive games will become the key to measuring 5G system performance. index.
2. Unlike the traditional concept of mobile communication systems, 5G system research will not only take point-to-point physical layer transmission and channel coding and other classic technologies as its core goal, but also from more extensive, multi-user, and more Antennas and multi-cell collaboration networking are the focus of breakthroughs and seek to achieve a significant increase in system performance on the architecture.
3. The indoor mobile communication service has occupied a dominant position in the application. 5G indoor wireless coverage performance and business support capabilities will be the system's priority design goals, thus changing the traditional mobile communication system's design philosophy of “mainly covering large areas and taking into account indoorâ€.
4. High-band frequency spectrum resources will be more applied to 5G mobile communication systems, but due to the limitation of high-frequency radio wave penetration capability, technologies such as wireless and wired convergence and optical wireless networking will be more commonly used. .
5. The 5G wireless network that can be configured "softly" will become an important research direction in the future. Operators can adjust network resources in real time according to the dynamic changes of service flow, effectively reducing network operation costs and energy consumption.
Practice is the sole criterion for testing truth. After experiencing the game of the previous four generations of network standards, the global telecommunications giants are well aware of the fact that “the market position has been promoted with the promotion of standardsâ€. They have increasingly racked their brains about how to write their own patented technologies, and they increasingly have to seize the discourse as soon as possible. The right to put up a horse. This is evident in the current R&D and layout of 5G. With the follow-up of global operators, equipment vendors and other parties, the issue of 5G standards has been put on the agenda.
4G just started, 5G is not far from people, the global 5G standard setting schedule has been released. The International Telecommunication Union (ITU) has started research work for the 5G standard and has defined the IMT-2020 (5G) work plan: The IMT-2020 international standard pre-study will be completed in 2015 and the 5G technology performance requirements will be launched in 2016. And evaluation method research, start the 5G candidate program collection at the end of 2017, and complete the standard formulation by the end of 2020.
The 5G standard national contest is being staged. There is a strong regional development - From the perspective of global 5G activity, the active participation of the Asia-Pacific region is higher than other regions because of the government's strong promotion. Among them, South Korea launched the “Future Mobile Communications Industry Development Strategy†with its 5G development master plan as its main content in 2015, and decided to fully launch 5G commercial services by 2020, and will invest 1.6 trillion won for this purpose. The Ministry of Internal Affairs and Communications of the People's Republic of China has reached an agreement to cooperate on the development of specifications for ultra-high-speed 5G (5G) mobile communication systems and strive to achieve commercialization of 5G before the 2020 Tokyo Olympic Games. Both declarations also stated that in order to avoid inconsistencies in frequency bandwidth and communication specifications used by various countries, cooperation will be established in international conferences and other occasions to formulate unified standards.
5G Development VisionMobile communications have profoundly changed people’s lives, but people’s pursuit of higher-performance mobile communications has never stopped. In order to respond to the explosive growth of mobile data traffic, massive device connectivity, and emerging new services and application scenarios, the fifth-generation mobile communications (5G) system will emerge.
5G will infiltrate all areas of the future society and build a comprehensive information ecosystem based on users. 5G will make information break through time and space limitations, provide excellent interactive experience, and provide users with an immersive information feast; 5G will bring the distance of all things together, and realize the intelligence of people and everything through seamless integration. interconnected. 5G will provide users with fiber-like access rates, "zero" latency experience, 100 billion device connectivity, ultra-high traffic density, ultra-high connection density, and ultra-high mobility, and many other scenarios. The intelligent optimization of business and user perception will also bring about 100 times more energy efficiency improvement and 100 times lower bit cost for the network, and ultimately realize the overall vision of “information to heart, everything and tentacleâ€.
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