5G will open the era of Internet of Everything. In order to achieve global unification of communication technologies, the 5G industry is committed to the unification of standards from the standard setting stage. Therefore, the 5G air interface standard is unified into one type, that is, 5G NR. However, in terms of networking mode, there are two networking modes, namely, an independent networking standard (SA) and a non-independent networking standard (NSA).
In December 2017, 3GPP approved a 5G non-independent networking standard that uses existing 4G as the basis for 5G connectivity. Now close to June 2018, the 5G independent networking version standard is about to be released, and is expected to be approved and released in June. Non-independent networking can be based on a 4G core network, while independent networking standards use a new core network. The three major operators in China also have their own views on the two networking methods.
China Mobile: Pay attention to the new capabilities of 5G end-to-end
China Mobile pays more attention to the establishment of independent networking standards, which represents a view of the industry that independent networking standards give 5G new end-to-end capabilities, can provide new slice capabilities of the core network, and can be customized for vertical industries. business.
As Li Zhengmao, vice president of China Mobile Communications Corporation, said, the first 5G NR version not only provides a 5G deployment solution for non-independent networking, but also completes the public part standard for non-independent deployment and independent deployment, which is a global unified 5G system. lay a solid foundation. It is believed that the next important milestone will be the completion of the independent 5G NR standard in June 2018, providing 5G end-to-end capabilities that will play a vital role for operators to explore enterprise and vertical markets. China Mobile actively cooperates with industry partners to implement 5G commercial deployment in 2020 and provide customers with diversified 5G services.
In January 2018, China Mobile Research Institute successfully completed the 5G core network technology verification test. The test content includes basic business processes such as service architecture, network slicing, edge computing and 5G independent networking.
After the standard is established, the industry will carry out related research and development, and the terminal is a huge challenge. Huang Yuhong, vice president of China Mobile Research Institute, said that in terms of terminals, China Mobile hopes that terminals and networks are coordinated, rather than terminal research terminals and network research networks, so that the corresponding functions and performance, including coverage, are good. Matching, the terminal supports both independent networking and non-independent networking to meet the needs of operators for flexible deployment.
China Telecom: Priority to adopt SA network
China Telecom’s flag clearly indicates support for independent networking. At the time of the release of the non-independent networking standard, Liu Guiqing, deputy general manager of China Telecom Group, said that China Telecom is very pleased to participate in the formulation of 3GPP standards and contribute to the completion of the first 5G NR standard. We expect this important milestone and the independent networking standards to be completed in the future, which will accelerate the development, validation and commercial deployment of 5G products in the coming years.
Subsequently, in January 2018, when the third phase of the 5G technology R&D test was released, Shen Shaoai, deputy general manager of the China Telecom Technology Department, said that China Telecom firstly targets the eMBB service and prioritizes the SA network. The main reason is that the non-independent networking architecture requires 4G and 5G base stations to be tightly coupled. In the non-independent networking scenario, the combination of the LTE active network band and the NR band has serious interference problems on the terminal side. In order to avoid frequent interoperability, the independent networking should be continuously covered as much as possible.
Regarding the terminal, Shen Shaoai said that 5G terminals will be diversified. At present, the demand for pan-intelligent terminals is not clear, and mobile terminals are still the mainstream. Compared with 4G terminals, 5G terminals have more industry-providing capabilities and will evolve along a variety of forms. In the early 5G, the terminal product form was mainly based on mobile phones in the enhanced mobile broadband (eMBB) scenario. China Telecom supports full-mode full-frequency Netcom. It is recommended that the 5G mobile phone terminal prefers the SA single-radio solution, and the voice implementation of the preferred SA fallback 4G VoLTE solution.
China Unicom: Both networking methods are important
China Unicom believes that both networking methods are important. Shao Guanglu, deputy general manager of China United Network Communications Group Co., Ltd., said that the first version of the 5G NR standard provides important functions for non-independent networking and independent networking, which is very important for operators. We believe that the entire industry can work together to further develop 5G technology and better serve the human society and vertical industries. China Unicom is looking forward to the arrival of the 5G era and will continue to work with industry partners to achieve 5G commercialization.
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