5G has not yet become popular, 6G research and development has begun. On November 3rd, the National 6G Technology Research and Development Promotion Working Group and the General Group of Experts were established, marking the official launch of China’s 6G technology research and development. After that, Ziguang Exhibition, China Unicom Net Research Institute said that it has started 6G related technology pre-research and reserves. Ren Zhengfei, Huawei’s founder, also told the media that Huawei’s 5G and 6G were developed simultaneously.
Original title: Interview with members of the 6G Expert Group: Suggested to explore 6G from seven aspects, technically inclination
What is 6G? Are there any key technical indicators? What is the mandate of the 6G General Expert Group? Yang Fengyi, a member of the 6G General Expert Group and deputy director of China Telecom Technology Innovation Center, told reporters that the current 6G research field is still out of the exploration stage, and there is no tendency in technology. In terms of the rate alone, 6G should be 10 to 100 times that of 5G.
6G rates are 10 to 100 times 5G
From the development law of mobile communication, about every ten years to update. Although 5G has not yet become popular, but the United States, Japan, South Korea, Russia, the European Union countries and regions have been in a hurry to carry out 6G related work.
It is understood that China’s 6G technology research and development promotion working group is composed of relevant government departments, the responsibility is to promote the implementation of 6G technology research and development work, the overall expert group from universities, research institutes and enterprises a total of 37 experts, mainly responsible for the 6G technology research layout recommendations and technical demonstration, for major decision-making advice and recommendations.
“The mission of the General Expert Group is to play a leading role in scientific and technological innovation and to promote research and development of 6G technologies. The expert group will develop the overall layout of 6G technology research, which is expected to conduct future mobile communication research in terms of vision and demand, wireless technology, network technology and so on. In Yang Fengyi’s view, although 6G research is still in the exploration stage, but this stage is very important, such as technical details to deploy late.
Yang Fengyi pointed out that the indicators of 6G have many aspects, from the rate alone, 6G should be 5G 10 to 100 times.
This year, the 6G flagship research programme at the University of Oulu in Finland released the world’s first 6G white paper to interpret 6G technology trends. The white paper lists several key measures for 6G technology: 6G single-user transmission rates of up to 1Tbps (1T-1024G), while 5G is 10Gbps, 6G indoor positioning accuracy of 10 cm, outdoor 1m, 10times higher than 5G 6G communication delay sits 0.1 ms (extreme industrial control scenario), is one-tenth of 5G; In addition, 5G is extended from less than 6GHz to the millimeter wave band, and 6G will move into the thertz (THz) era, with significantly increased network capacity.
Yang Fengyi told reporters that the 5G era of communication is not limited to mobile phones or computers, the 6G era is even more so, so there is unlimited space for imagination. For example, the intelligent life and working environment has become a basic feature of society, “you can imagine that everyone’s human body is a networked machine, the physical condition can be uploaded to your own ‘medical center’, and then based on intelligent medical analysis, give you advice on life, work, and entertainment.” 6G era, can be connected to the Internet of Things, people connected. ”
6G is expected to enter commercial phase by 2030
In October, Ren Zhengfei told Kuwait’s state news agency that 6G and 5G Huawei were doing it simultaneously. “The main thing about 6G is that the bandwidth is wider, but the coverage capacity is not enough, it is millimeter wave, the coverage distance is relatively short. This depends on the communication technology in the theoretical breakthrough, technological breakthrough, 6G can go to practical, we estimate that it will take ten years. ”
“6G basically enters the commercial phase around 2030, is based on the law of development, but it is not absolute. With the development of technology and applications, many technologies will be used in advance in the middle of the intergenerational transition, such as CDMA technology is a typical feature of 3G, but its basic technology is already used in 2G IS-95 systems; OFDM and so on have been standardized in 3GPP R8. Therefore, the true true 6G standard may be formed in a decade’ time, but if advanced technology can improve system performance and customer experience, it will be adopted ahead of time. Yang Fengyi told the news reporter, not 6G into commercial, 5G will withdraw from the communications stage, China’s mobile communication development law is multi-network integration, long-term coexistence.
“Even now we are commercially 5G, 2G networks and businesses will continue to serve our customers. As a result, 6G is coming and 5G is still working. On the one hand, the new generation system after many years of construction to achieve the quality of service of the old generation system, on the other hand, the old system after many years of development, the industrial chain is quite mature, with a very high cost-effective. In addition, many traditional businesses do not necessarily need high-performance metrics to meet, and users may not have the motivation to migrate. Yang Fengyi said.
Explore terahertz communication
Ziguang Rui, China Unicom Network Research Institute in the exploration of potential 6G key technologies, all mentioned the “terahertz communication” this keyword. Feng Yi, head of the 5G Innovation Center at China Unicom’s Net-a-Porter Research Institute, believes that terahertz communication is a key technology to realize the 6G vision.
In Feng Yi’s view, in the future 6G communication, terahertz communication technology will be integrated with other low-frequency network fusion networks, widely used in the ground of a variety of ultra-broadband wireless access and fiber replacement scenes, equipped with satellites, drones, airships and other platforms, as wireless relay equipment, used in the air-to-terrestrial multi-dimensional integrated communications, The multi-scale communication applied to macro-to-micro has become an important supporting technology for the integration of social information in the future.
“Terahertz is a section of the radio spectrum, between microwave and visible light, which has a huge bandwidth and is currently occupied very little, and the huge bandwidth offers the possibility for future development, becoming a frequency band to pay attention to in the future of mobile communications.” Yang Fengyi told the news reporter.
It is understood that the terahertz band refers to the frequency in the range of 0.1 to 10THz electromagnetic waves, frequency between microwave and infrared band, both microwave and light wave characteristics, with low quantum energy, large bandwidth, good penetration and so on, is the most effective technical means of real-time wireless transmission of large-capacity data. Therefore, the development and utilization of this spectrum resource has been paid attention to by all countries in the world. Among them, Japan has listed the development of terahertz technology as the “national pillar technology ten key strategic objectives”, and will be in 2020 Tokyo Olympic Games to achieve 100 Gbps terahertz high-speed communications. The EU has also listed the development of terahertz communications as part of a 6G research programme.
“The potential for terahertz communications is very promising, but it also faces many challenges. Feng Yi said that the development of the industry of teletz communication key devices faces technical bottlenecks and challenges such as material technology, chip integration/packaging, miniaturization, communication distance/real-time/air separation/power consumption. In addition, how to model the channel for multi-dimensional multi-scale application scenarios at the end of terahertz communication is still to be discussed.
It is recommended to explore 6G in seven ways
Even though many countries have actively explored 6G, enterprises began to explore terahertz communication, but the global 6G technology research is still in the initial stage of exploration, the technical route is not clear, key indicators and application scenarios are not uniform definition. As a member of the 6G General Expert Group, Yang Fengyi believes that 6G can be explored in the following seven aspects.
First, to study the future social form and the needs of the application of emerging industries, social needs and the future mobile communication network seamless lying, to achieve the overall coordinated development of people, goods and society;
Second, the study of low-frequency, medium-frequency, high-frequency, terahertz, visible-light frequency band of full-band wireless communication technology, the formation of a unified wireless network architecture, support ingress with users in different spectrum resources, different application scenarios, different multi-site technology between the free and flexible conversion;
Third, research and support the future ultra-high-speed data stream (such as 8K ultra-high definition video, holographic display, HD VR/AR, etc.) of the new content distribution and transmission technology, to achieve high-speed data flow efficient transmission;
Fourth, research cloud, network, edge convergence / coordination of new network architecture and key technologies, to achieve the agile, efficient, flexible communication network, to meet the needs of business and application development;
V. For the typical industry application in the near and medium term, to study the relevant technical connotation slots and concrete technical means of the future basic network, and to promote the evolution of the network architecture from the current single IP network without effective QoS guarantee to a new network system that supports a variety of reliable network indicators;
Sixth, in view of the weakness of China’s industry, focus on technological research and industrialization layout, to achieve the core chips, software, components of the independent control. Areas to focus on include CPU/GPU, network operating system, terminal RF filter, low- and medium-frequency RF chip, high-frequency chipr component integration solution, basic resistor capacitor inductor, etc.
Seventh, to study the new network architecture and key technologies of communication and security integration, to achieve basic network, information and data security, to ensure national security.