Although the Ministry of Industry and Information Technology issued TD-LTE 4G licenses to the three major telecom operators at the end of last year, for China Unicom and China Telecom, they are more eager to develop FDD-LTE licenses that match their 3G development. Compared with China's independent standard TDD, FDD is the mainstream 4G standard in the world. At the same time, the development of China Unicom and Telecom's 3G system is more in line with the evolution of technology, but because the current mainstream telecom equipment manufacturers can support TDD and FDD two 4G standards, the next two standard hybrid networking has become a major trend. Recently, there are indications that the FDD-LTE license will be released soon. Even if the trial network license is issued, it will be enough for China Unicom Telecom to cheer, because they can use their 4G to develop their own taste against China Mobile. After all, China Mobile is the core leading force of TDD technology. In the case of only TDD licenses, China Unicom is difficult to compete with mobile. Although there is no accurate information on the date of issuance of FDD licenses, Unicom and Telecom are not arguing about the follow-up competition strategy. According to Tencent Technology, once the FDD license is issued, it will be widely and widely used in the 4G network planning of China Unicom and China Telecom. The covered 4G network uses the FDD system, while the densely populated areas of the city will use the TDD system to absorb excess traffic. FDD license issuance is approaching All along, the news about when the FDD-LTE 4G license was issued has never stopped. From the day of the TD-LTE 4G license issuance, there are many different sayings. Recently, some news in the industry has locked this time in the industry-specific meaning. 5.17 Telecommunications Day". When the license was issued, it was decided by the Ministry of Industry and Information Technology. Tencent Technology did not confirm the relevant person in charge of the license. The three major operators also said that Tencent Technology did not receive relevant documents, but there was no wind and no waves. It is claimed that FDD will be officially released on "5.17 Telecom Day". It is understood that the theme of this year's "5.17 Telecom Day" is "Broadband promotes sustainable development", emphasizing that today, networked, broadband has become a transformative tool that can accelerate sustainable development. If the FDD-LTE 4G license is issued at this time, it seems that it does not match the theme. However, the development of wireless networks to 4G, and even the future of NG, is inseparable from the support of fixed-line broadband. From this point of view, it is not impossible to issue. Tencent Technology has learned from other sources that the FDD-LTE 4G commercial license will not be issued on Telecom Day, but it will not rule out the trial network license for FDD-LTE 4G, because the network deployment of FDD-LTE has not really started yet, and commercial licenses have been issued. The significance is not great, but the unlicensed operators can not open the bidding scale, so the trial network license is more reasonable, and the initial stage is only for some cities, which is similar to the multi-city TD-LTE trial network. Xiong Wei, general manager of China Unicom's marketing department, told Tencent Technology recently that after the FDD license, China Unicom will further increase the speed of 4G network construction. It is expected that the 4G network coverage of 300 cities in China will be achieved this year. Among them, a 42M 3G network, a 100M TDD 4G network, and a 150M FDD 4G network triple network coverage are implemented in hotspot cities. Due to the embarrassing situation of China Telecom CDMA in the 4G evolution system, its position is relatively neutral. “The issuance of FDD licenses has a positive effect on TDD, because the international technology overlap between TDD and FDD is 90%. The issuance of FDD licenses is beneficial for Chinese companies to participate in international competition and also for consumers' international roaming business, because 95% of the world's The network standard adopted by 4G users is FDD or TDD and FDD hybrid.†A Chinese telecom person told Tencent Technology. It is understood that once the FDD license is issued, in the 4G network planning of China Unicom and China Telecom, the large-scale and wide-coverage 4G network uses the FDD system, while the densely populated areas in the urban area will use the TDD system to absorb excess traffic. 4G contest has just begun 2014 is considered to be China's 4G first year. As one of the important forces driving information consumption, the development of China 4G in this year is worthy of attention. Especially after the issuance of FDD licenses, the real contest of the three major operators began. In the past six months, China Mobile has promoted the rapid development of the autonomous 4G standard TD-LTE. The network coverage, terminals and tariffs can go hand in hand. In particular, network coverage, from the initial few cities, signal instability to the current coverage of hundreds of urban centers, outdoor signal flow. Although China Unicom and China Telecom also have TDD-LTE licenses, they are more willing to invest in the latter than they are more suitable for their FDD-LTE licenses. So far, the number of TDD base stations deployed is very small, and the total number of TDD base stations is tens of thousands, and China Mobile has completed 250,000 4G base stations. As for the first quarter of this year, the number of mobile subscribers of China Telecom decreased by 2.38 million. China Telecom said that the decline in the number of mobile subscribers was mainly due to the launch of LTE services by competitors, enhanced marketing promotion and increased market competition. Analysts believe that although China Telecom obtained the TDD LTE 4G license in December last year, it has been unable to develop users on a large scale due to terminal constraints, so it has been actively applying for FDD licenses. If the FDD license is obtained as scheduled, it will be able to effectively respond to the mobile publicity and marketing campaign to curb the decline of the business. In addition, industry insiders said that the China Unicom's TDD LTE license obtained last year is no different. If the FDD license is not obtained for a long time, the network advantages and user reputation accumulated in the 3G era will be exhausted. Therefore, the sooner FDD is issued, the more favorable it is to the development of China Unicom. Since only TD-LTE licenses have been issued, the current 4G wars of the three major operators are not at the level of network construction, but the tariff wars are the first. If the first half of the year is China Mobile's 4G "one big" situation, then once the FDD license is issued, the three operators' 4G contest will really start. 2014 is considered to be China's 4G first year. As one of the important forces driving information consumption, the development of China 4G in this year is worthy of attention. Especially after the issuance of FDD licenses, the real contest of the three major operators began. 3520 Phenolic Paper Laminated Tube is formed by hot rolling, baking insulation paper impregnated with phenolic resin under heat and pressure. It is class E (120℃) insulation with high mechanical property. It has good dielectric property in dry conditions.
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