Just last night, Telecom Unicom announced that the TD-LTE/LTE FDD hybrid network test city expansion to 40 cities, coupled with the pace of mobile 4G construction, 4G unprecedented speed. However, technology has always been a pioneer. At the time of 4G, people did not fully experience the extreme experience brought by 4G. 5G has already begun to explore the road. Although the 5G terracotta has moved, there are still many problems to be solved. Come, the first is the spectrum. While 5G spectrum = low frequency band + possible high frequency band, the current IMT focuses on potential candidate bands below 6GHz (mainly for WRC-15), and the next step will consider high frequency bands above 6GHz (for WRC-19 and beyond). 5G terracotta has moved Technology is first, this is not a fake. At present, 5G related research work has begun in the world, and the Terracotta Warriors have moved. According to reports, the ITU has initiated pre-research on 5G standardization, conducted a demand vision study from July 2012 to July 2015, and conducted future technology trend studies from July 2012 to October 2014, before WRC-15 in November 2015. Conduct spectrum requirements and candidate band studies for WRC-15. It is initially determined that the 5G standardization process will be initiated in mid-2015, and candidate technology proposals will be launched at the beginning of 2018 or the end of 2017, and the 5G standard will be completed by 2020. Most companies believe that 3GPPR14 can initiate 5G standard research, and R15 will form the first version of the 5G standard. The EU has also launched METIS and 5GPPP research projects. It is reported that METIS is a pre-development project for the EU 5G. It was launched in November 2012 with a total investment of 27 million euros for 2 and a half years, mainly for the 5G pre-study for 2020. The test prototype will be developed for verification. The 5GPPP is the main R&D project of the EU 5G. The EU launched the project in December last year with a total investment of 1.4 billion euros and execution time from 2014 to 2020. It is understood that 5G-PPP is divided into three stages, 2014-2016 is the basic research and vision establishment stage, 2016-2018 is the system optimization and pre-standardization stage, and 2018-2020 is the scale test and initial standardization stage. In the front of Korea, 4G took the opportunity to set up a 5G forum to launch the GigaKorea project. It is reported that the 5G Forum proposes Korea's 5G national strategy and medium- and long-term planning, researching 5G concepts and needs, cultivating new industrial bases, and promoting the construction of mobile service ecosystems at home and abroad. Members include more than a dozen major Korean equipment manufacturers, operators, universities and Research institute. The GigaKorea project aims to establish a smart ICT environment capable of providing Gbps services in 2020, providing people with a panoramic life experience anywhere, from 2013 to 2020, with a total investment of 550 billion won, of which the government invested 412 billion won. In addition, Japan's ARIB established the 5G Research Working Group (2020 and Beyond Adho), led by NTT DoCoMo, and currently has 31 member units. The goal is to study the concepts, basic functions, functional distribution and architecture of mobile communication systems in 2020 and beyond. Study 5G potential key technologies, system concepts, basic architecture, business and applications, and promote international cooperation. In China, the IMT-2020 (5G) promotion group was established to comprehensively promote the research and development of 5G technology. It is reported that the IMT-2020 (5G) promotion group was jointly established by the Ministry of Industry and Information Technology, the National Development and Reform Commission and the Ministry of Science and Technology in February 2013 as a domestic promotion of 5G technology research. The basic platform for development and international cooperation. There are currently more than 50 members. In addition, there are 863 layout 5G R&D projects. The time promotion plan is: In 2014, the 5G overall technology, key technologies for wireless transmission, key technologies for wireless networks, technology evaluation and testing, etc. will be launched. In 2015, the soft foundation test platform will be launched. Research on key technologies such as intra-wave access, key technologies for wireless network virtualization, new modulation and coding, and security. 5G spectrum = low frequency band + possible high frequency band Spectrum resources are the core resources for promoting the development of mobile communication and information industry. The spectrum resources in the 4G era are already in short supply. The future 5G has to consider this severe problem. Therefore, the International Telecommunication Union (ITU) will look for new mobile communication for 2020. Spectrum resources are listed as a top priority for the 2015 World Radiocommunication Conference (WRC-15). The ITUWRC-15 issue domestic research team predicts that China's 2020 spectrum demand will be 1490MHz~1810MHz. Considering the future IMT potential candidate frequency bands mainly include 3300-3400MHz, 4400-4500MHz, 4800-4990MHz and 3400-3600MHz. The 5G spectrum = low frequency band + possible high frequency band. Therefore, the current IMT focuses on potential candidate bands below 6GHz (mainly for WRC-15), and the next step will consider high frequency bands above 6GHz (for WRC-19 and beyond). In the 5G candidate band (below 6 GHz), the band already used for IMT can be used for 5G by re-fanning, and the band that has been allocated to IMT but not yet used should promote the commercialization of the band already allocated to IMT as soon as possible, such as 700MHz. , 3.5GHz. In addition, WRC-15 may be allocated to the frequency band of IMT, try to obtain more frequency bands for IMT to meet the needs of 5G, such as 3300-3400MHz, 4400-4500MHz, 4800-4990MHz. In addition, in the 5G candidate frequency band (above 6GHz), 6GHz, especially millimeter wave, firstly combines channel measurement to verify its feasibility for mobile communication. If feasible, consider compatibility and frequency management with existing services and systems. Policy, giving recommendations for candidate bands.
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