Under the government's overall planning, China Mobile will conduct scale trials of 5 cities and business demonstrations in 12 cities between 2018 and 2019. In the early stage of 5G commercial deployment, on the one hand, it is necessary to pass test and verification to continuously promote the maturity of end-to-end pre-commercial products, ensure the timely launch of 5G commercial products, and focus on the reduction of RRU power consumption, the improvement of integration, and NSA and SA. End-chip development, core network virtualization architecture maturity, etc., and promote end-to-end implementation of interoperability based on unified protocol versions; on the other hand, 5G key technology performance verification for 5G commercial complex scenarios and 5G commercial network The pilot work in planning, networking, construction, and operation will lay the foundation for promoting 5G comprehensive commercial use.
Liu Guangyi
Chief Engineer, Institute of Wireless and Terminal Technology, China Mobile Research Institute
China has the following characteristics in terms of 5G requirements: First, domestic scenarios are more and more complex, 5G network construction needs to use multiple coverage schemes in combination; second, with the popularity of mobile Internet, user business needs are also more abundant, and at the same time as manufacturing Demand for large countries and industrial upgrading, demand from vertical industries will be more abundant, and it is necessary to further strengthen the integration and expansion of vertical industries.
As with other network constructions, the construction of 5G networks will not be completed overnight, and the construction progress will be carried out in a reasonable manner. For example, in the initial stage of network construction, continuous shallow coverage of key areas can be considered. Since the initial frequency band of 5G is 3.5GHz, the higher frequency band leads to significantly lower signal propagation loss and penetration loss than existing 4G networks. In order to enhance network coverage and improve network capacity and performance, 5G base stations must support large-scale antennas and large Bandwidth, equipment cost, size and weight have all increased, which will pose challenges for network planning, construction and optimization. In addition, the on-demand construction method is a viable option, and the scale will be gradually expanded with the popularization of the terminal and the development of the business, and gradually introduce various types of small stations for coverage and capacity expansion, and introduce new frequencies. Gradually create a high-frequency, low-frequency and efficient 5G network.
In 5G services and applications, 5G can provide ultra-large bandwidth, ultra-low latency and large connectivity, and support user-centric customized services. China Mobile established the 5G Joint Innovation Center, which is aimed at 5G promotion and integration and innovation in various vertical industries. At present, it focuses on seven areas of smart transportation, video entertainment, industrial energy, smart city, education, medical care, artificial intelligence and robotics. On the one hand, it conducts end-to-end basic capability research and promotes the application of innovative solutions for industry applications. A number of open platforms, such as Open Labs, 5MII Multimedia Innovation Alliance and Campus Collaboration, promote the application of innovation in the open platform.
5G urgently needs low frequency bandSpectrum resources are the cornerstone of 5G development. The IMT-2020 propulsion group predicted China's 5G spectrum requirements, requiring 808M to 1078MHz spectrum in the frequency band below 6GHz and 14.8G to 19.7GHz spectrum in the frequency band above 6GHz. In order to promote the development of China's 5G, the Radio Management Bureau of the Ministry of Industry and Information Technology has planned the 3300M to 3600MHz and 4800M to 5000MHz frequency bands for 5G, and publicly collected the opinions of the 24.75G to 27.5GHz and 37G to 42.5GHz frequency bands for 5G system frequency planning.
5G needs to face diversified application scenarios such as mobile Internet, large-scale Internet of Things, low latency and high reliability. On the one hand, it needs high-band continuous large-bandwidth spectrum to meet the requirements of 5G high service rate and high capacity; on the other hand, it needs to meet The user's always-on needs to ensure high-speed mobility of the user must also provide good network coverage with low frequency bands, especially low frequencies below 1 GHz. At present, the 5G spectrum that China has planned or to be planned is basically above 3GHz. I think that the low frequency band, especially the frequency below 1GHz, is urgently needed; therefore, it is recommended to adopt a management method in which frequency and technology are loosely coupled, allowing operators to timely and autonomously re-cultivate. 5G is deployed in the existing frequency band; at the same time, for the medium and long-term development of 5G, it is recommended to plan sufficient spectrum for 5G in the frequency band above 6GHz and promote the maturity of related millimeter wave technology and industry.
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