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5G base station test next weather satellite communication out of the situation


Recently, the Luzhou City Economic and Information Bureau held a symposium on the use of interference coordination for 5G base stations, and coordinated the deployment of 5G base stations with the existing satellite communication units. Since May 11 this year, the Shengzhou Meteorological Bureau has found that the satellite communication equipment has a signal reception failure. After repeated tests and investigations, it is found that the impact of the newly installed multiple 5G test base stations near the Meteorological Bureau. Li Xiaoyong, director of the Information Center of Ganzhou Meteorological Bureau, told reporters that these 5G base stations are only two or three hundred meters away from the meteorological station satellite communication receiving station. Li Xiaoyong introduced that the satellite communication equipment of the 5G base station and the meteorological department used electromagnetic wave frequency bands relatively close, so the meteorological transmission appeared interference phenomenon. To this end, the Cangzhou Meteorological Bureau subsequently made adjustments, installed a signal shielding network, and switched to a broadband line to receive meteorological data.

    Meteorological satellite communications interference occurs, the new 5G base near find out.

    Since May 11 this year, the staff of the Ganzhou Meteorological Bureau found that the downlink transmission data of the satellite communication system could not be completely received. "At that time, the quality of communication was immediately reduced. Receiving data, we said that the satellite signal was called into the lock, and we could not enter the chain." Li Xiaoyong said that this equipment has been used for more than 10 years, and there has been no such failure before. . The staff of the Meteorological Bureau conducted many tests and investigations, but the reasons were not found. In mid-June, the Cangzhou Meteorological Bureau consulted the radio office of the Cangzhou Economic and Information Bureau on this phenomenon, and the Cangzhou Economic and Trade Bureau arranged the radio monitoring station to go to the site for processing and troubleshooting, eliminating the equipment itself and finally determining the telecommunications nearby. The signal interference transmitted by the 5G base station is caused. Li Xiaoyong said that these 5G base stations were installed in the telecommunications department for testing. They did not get the news before. "At the time, I just heard that the big cities are already doing 5G testing. I don't know that Ganzhou is also doing this."

    Later, the coordination and communication revealed that the telecommunications department installed three or four 5G base stations in the vicinity of the Meteorological Bureau, and the nearest meteorological station communication satellite receiving station was only two or three hundred meters. After coordinating with the telecommunications department, after the test base stations were turned off, the weather station's communication system failure disappeared. Start an alternative,

    No impact on meteorological forecasts In the more than one month that satellite communications continued to be affected, the Ganzhou Meteorological Bureau enabled the transmission of broadband private lines. Li Xiaoyong said that although satellite communications were disrupted, the quality of weather forecast in Zhangzhou was not affected.

    Li Xiaoyong introduced that the impact of the 5G base station on the Ganzhou Meteorological Bureau is the impact of communication. The Ganzhou Meteorological Bureau uses a wireless communication system, which is mainly used for collecting and distributing meteorological data. Because satellite communication has a large amount of transmission and fast data transmission, it is common to use radio communication.

    After the radio communication was affected by the interference, the Zhangzhou Meteorological Bureau activated the emergency plan and switched to the broadband transmission signal. Li Xiaoyong told the reporter that the Shengzhou Meteorological Bureau purchased the broadband line of the communication carrier, and its data receiving and distribution has been kept open after the interference of wireless communication.

    Li Xiaoyong said that there are many ways to solve it. In fact, you can also find the surrounding city and state meteorological bureau to help you temporarily process the data. After determining the signal interference, the Zhangzhou Meteorological Bureau has also installed a shielding network for its satellite receiving station. The test found that the shielding network can solve the 5G signal interference problem.

    Regarding the impact of 5G signals on existing satellite communications in the local area, the Cangzhou Economic and Trade Commission did not reply more.

    Why interfere with meteorological satellite communications? Because the electromagnetic wave band is too close

    Li Xiaoyong told reporters that the reason why the satellite communication of the Zhangzhou Meteorological Bureau was disturbed was caused by the relatively close electromagnetic wave bands of the two. Li Xiaoyong said that in addition to the impact of the meteorological department, other units using C-band satellite communications may also face such problems. According to him, Sichuan's 5G base station test began testing in several cities, and its signal interference phenomenon has also occurred. However, Li Xiaoyong said that this problem is not difficult to solve, and the impact is limited and controllable. For example, installing a shielded network has been proven effective.

    Ma Yan, professor of the Network Technology Research Institute of Beijing University of Posts and Telecommunications and director of the Information Network Center, told reporters that "the general traditional communication base station ranges from a few kilometers to ten kilometers, and it is better to avoid this range." Ma Yan said that within a small area of the city, The interaction between the 5G base station and the traditional communication base station requires technical means to solve.

    Expert: 5G signal will not affect weather monitoring

    Li Xiaoyong told reporters that the satellite communication of the Zhangzhou Meteorological Bureau was affected by the 5G base station, and it was not the same concept as the 5G signal affected by the previous network.

    Previous media reports that because the 5G signal frequency is similar to the natural wavelength of water vapor, it will affect weather monitoring. According to reports, the reason why 5G signals may threaten the accuracy of weather forecasting is that the frequency band that the United States will use to develop 5G communication networks occupies a band of about 23.8 GHz (gigahertz), and the signal and water vapor of this band The natural wavelengths give very similar signal frequencies. Ma Yan, a professor at the Network Technology Research Institute of Beijing University of Posts and Telecommunications, said, “The actual situation is not as serious as that reported by foreign media, because the 5G frequencies used in each country are different.” According to the Communication Information Report, China’s current Fengyun meteorological satellites are used. The frequency bands are 137 GHz and 1700 GHz. Compared with the 2.6 GHz to 4.9 GHz of 5G signals, the gap is obvious, and there is no interference between them.