Chapter 118 Important Model, Professor Zhou was dumbfounded (Subscription Request) Chen Qiyi stared and listened to the conversation between the two people. He knows Zhou Wei very well. Zhou Wei’s personality is actually quite introverted. Rarely show emotions on your face. But today, Chen Qiyi clearly felt Zhou Wei's urgency. And Zhou Wei just said that Lu Shan’s paper can definitely be published in Area 1. Chen Qiyi became a little agitated. Even if the division is based on the standards of the Xiaguo Academy of Sciences. There are not many types of communication journals that can be ranked in the first zone, and most of them are probably from abroad. This shows that Lu Shan’s paper is of great value.
Lu Shan said, "You can look at the model, but it's on my laptop. You have to wait a moment. I'll go get the computer." Zhou Wei agreed to let Lu Shan get the computer, and he also quickly called the teacher of his research group and asked the teacher to bring some data from a certain city's base station. These data include the equipment model and type inside the base station, as well as the population distribution of the city, etc. Teacher Gao from the research group also came with a computer. He was very surprised because this city was a subordinate district of a developed first-tier coastal city, and 3G base stations had been laid out long ago. Moreover, both China Unicom and China Mobile have completed the layout of 3G base stations. Of course, if China Mobile's TDSCDMA is considered as 3G. So you still need information at this time? After Mr. Gao came to the office, he said, "Professor Zhou, I have the data, but haven't the 3G base stations in Jiangsong District been deployed?" As one of the pilot cities for 3G in Xiaguo, Jiangsong District is one of the first few cities in the country to achieve full coverage of 3G signals. 江松区已经建设了700个3G基站，在3G基站和2G基站并用的情况下，覆盖用户接近40万人，总投资金额也接近6亿元。 Zhou Wei said: "You stay here, don't leave yet." Zhou Wei originally studied the layout of base stations in Jiangsong District as a research topic for his doctoral studies. The initial research was to save the cost of 3G construction by purchasing 3G equipment from different brands and deploying them in different ways. The project was jointly initiated by relevant departments of Jiangsong District, China Unicom and China Mobile. Initially, it was intended to be handed over to Shanghai Jiao Tong University in Shanghai. Finally, Zhou Wei obtained 100 million yuan in research funding through his connections in the academic community. Research funding is not important. What is important is that getting the research project can enhance the voice of my team and Jiangzhou University in 3G. Through their own efforts, Zhou Wei's team optimized the procurement of equipment and the layout of base stations, saving nearly 1 million yuan compared to the previous budget. This achievement is the result of Zhou Wei's team's unremitting efforts and repeated analysis. At the same time, it has also been highly recognized by China Unicom and relevant departments of Jiangsong District. Both parties were very straightforward and handed over 100 million yuan of research funds to Zhou Wei's team through the school. Now that Zhou Wei has read Lu Shan's paper, he also wants to use Lu Shan's model to analyze whether the base station layout, equipment brand and signal selection that they had worked so hard to analyze are correct.
Ten minutes later, Lu Shan brought the laptop from the dormitory. Under the watchful eyes of two professors and other teachers. Lu Shan clicked and ran the base station site selection model. The model's interface is very simple. The most important thing is the input of relevant parameters. What surprised Zhou Wei most was that the model also supports the import of satellite maps or CAD drawings. Zhou Wei then entered the relevant parameters of Jiangsong District in the corresponding parameter interface, including the city’s area, the city’s population, areas with relatively high population density, etc. Then input some information about the base station equipment, including the brand of the equipment, the corresponding parameters, etc. Finally, use coordinates on the map to indicate where base stations cannot be built. After entering these data. Then click Run. Due to the limited parameters of Lu Shan’s laptop computer, the computing speed is very slow. After waiting for more than half an hour, the calculation results appeared. The final analysis result is. According to Songjiang's current topographic map, population layout, population density, and the signals of the purchased 3G base station equipment and other parameters, in order to achieve full coverage of 3G communication signals in the SJ area and to ensure that the network will not be stuck in densely populated areas, the minimum number of 3G base stations required is 567. The analysis software also gives the exact location where each communication base station should be built, including marking the location on the map and giving specific coordinate parameters. Coordinate parameters are expressed in terms of longitude and latitude. Teacher Gao was also surprised when he saw the result. Calculated in this way, the minimum number of base stations inferred by Lu Shan's model is 133 less than the number of base stations estimated by Zhou Wei's team after great efforts and repeated calculations. If we calculate based on a 3G communication base station, the minimum cost is 80. It can save more than 1 million yuan in construction costs. Teacher Gao was upset. "Is the model wrong? We have come up with data like 700 base stations after repeated practice and verification." "When running this software, 133 seats were lost at random. The error is too big." Zhou Wei is also very cautious and he will not immediately believe the data produced by the software. Lu Shan's paper is indeed very well written, with very clear logical thinking and budget formulas. But from theory to practice, this is a very difficult process. It doesn’t mean that just because the theory is correct, your practice is 100% correct. After all, in the process of practice, we will encounter many objective conditions that were not anticipated in theoretical calculations. Zhou Wei said to Lu Shan: "Can you lend me this model software?"
"We just completed the measurement of 3G base stations in Jiangsong District last year." "We calculated that the number of base stations is at least 700 to provide full signal coverage for the entire Jiangsong District." "Your software only calculated 567 seats. We need to go back and recalculate this." Lu Shan nodded in agreement. "Using ordinary computers for calculations is slow, so I will copy the software to the computer school's server. I have a small project there." "Just come and use it whenever you need it." Lu Shan also exported the final data from the software and copied it to Zhou Wei so that Zhou Wei could verify it. Zhou Wei also promised Lu Shan: "Please rest assured that your paper is completely fine from an academic perspective. I will immediately submit the paper to Transactions on Wireless Communications under the IEEE (Institute of Electrical and Electronics Engineers). Currently, its impact factor is above 8 points." "But we need to complete the testing of your model before we can talk about the next step." "Published in TWC?" Chen Qiyi was still a little surprised. Although TWC is an electronic communications journal, it is well-known in the first zone of the Xiaguo Academy of Sciences. Many teachers from the School of Science will also try to publish some mathematical research related to communications in this journal. It can be seen that the requirements of this journal are very high. Moreover, the impact factor of this journal is above 8 points, which makes it an authoritative journal in the field of communications. Lu Shan had no objection to these, but made a request. (End of this chapter)