WiFi doesn't affect the safety signal frequency of the train.

Recently, China Iron and Steel deputy chief engineer Mengshu in an interview, said the train does not open WiFi is security considerations. Yesterday, the reporter from the Transportation and related communications development company learned that the current development of the "train WiFi" system, and in the near future will be in the Chengdu-Chongqing train to achieve WiFi coverage. WiFi doesn't affect train traffic. Yesterday evening, Southwest Jiaotong University information Science and Technology School of Communication Engineering, Professor Fang Xuming, the director of the Department of Communications, Mengshu misunderstood the concept of subway communication and train communication, the use of WiFi on the train will not affect the frequency of high-speed rail communications. In order to ensure the normal operation and dispatch of the train, the railway communication, such as GSM-R frequency, is 800-900mhz, belonging to the special Communication frequency band and specially protected. The communication of railway system is specially covered and optimized along the railway line, and the signal quality is guaranteed. The frequency of communication between WiFi and Subway is in the public band, which is available in 2.4GHz, medical and other public organizations. Because of the same frequency of subway and WiFi, using WiFi on the subway may affect Metro communications. However, the communication systems and WiFi systems in the railway sector use different networks, which are different in frequency bands and system formats, and "there is no impact between the two systems". Timely release of "Train WiFi" progress Southwest Jiaotong University information Science and Technology College Communication Engineering Department and a Beijing communications company is currently developing "train WiFi" system, during the Spring Festival during the travel of Chengdu-Chongqing EMU on the test run. Yesterday, the reporter called for "Train WiFi" system development of a Beijing communications company, the company's relevant head De Shiping said, "Train WiFi" system is expected to be in the near future in Chengdu-Chongqing motor vehicles put into use. De Shiping said the "Train WiFi" system is under development, "will be published in due course, we are discussing this matter with the Railway Corporation, at this time node we will not disclose the relevant information." Subsequently, the reporter calls the Southwest Jiaotong University information Science and Technology College Communication Engineering Department director Fang Xuming professor. Fang Xuming also said it was meeting with Chinese railway engineering companies to discuss issues related to the "Train WiFi" system. Synchronous broadcast WiFi signal does not affect Chengdu Subway operation Tianfu Morning News reporter from the Chengdu Radio Management Committee of the relevant officials learned that the use of WiFi on the subway will not affect the operation of the subway. At the beginning of the Chengdu Metro Planning, the Office of the Radio Management Committee of Chengdu held an expert review meeting on the 800MHZ digital trunking communication system of Chengdu Metro Company 1 and Line 2, and investigated the communication system design of Chengdu Metro Company, and confirmed its safety and reliability. Secondly, before the opening of the subway, the city committee also organized the Chengdu radio station to test the electromagnetic environment of all the stations of Chengdu Metro Line 1 and Line 2, which ensured the safety of the finger distribution frequency. At the same time, established a regular communication mechanism, the establishment of the emergency leadership team, and the electronic Government Emergency network, once theThere are problems in the underground operation of iron, and the ground can know the situation in time.