Research Of High-speed Railway Station TD-LTE Wireless Network Coverage And Optimization

With the advent of modern times, Mobile communication industry has a leap in development, from 2G to 3G and then to today’s the application of 4G technology which is based on TD-LTE, provides the public with the promotion of mobile communication speed, meanwhile, the quality of communication service of mobile franchisers is also confronted with new and higher requirements. On the basis of overseas and domestic research data, more and more data traffic will increase indoors, especially at some special sites, for instance, high-speed railway stations where communication network has concentrated users of Internet, and vast business requirements, thus at these specific sites, excellent indoor planning scheme can furnish higher-quality and stabilized service, at the same time, the planning scheme could save resources and raise efficiency of subsequent construction. Nevertheless, the interior and outdoor design of the TD-LTE is disparate, affected by environmental factors, the planning scheme becomes more reliant on technical personnel with improper accuracy and inefficiency brought in so far, many aspects need to be perfected in interior TD-LTE planning.The thesis analyzes the current approach and process of TD-LTE interior network planning at first, then analyzes frequently-used propagation model of TD-LTE, with comparison and analysis, take the case of Dalian North Railway Station, optimize the original Keen-Motely propagation model, join the wireless signal propagation process is affected by factors arising from the impact of the diffraction barrier and ground reflection. In Analyzing Progress of planning method, ray tracing method is used as the basic judgment method, The sub-scenes to calculate the path loss of concepts to the planning process, the final position of the antenna proposed optimization methods within the district, so that the edge courses within a single antenna coverage and strong as possible to meet the minimum requirements under the premise of uniform coverage. The last section simulates the proposed planning method, include path to the scene of a single antenna coverage area three-dimensional digital modeling, antenna reference point to the edge of the field point at different locations loss calculation, this thesis proposes the utilization of high-speed rail station interior wireless network planning methods can be made within the coverage area, the antenna reference point of the path to the edge of the field point loss in more than the average of the lowest point of comparison, meanwhile variance is the minimum, indicating that the proposed method is effective improve planning efficiency interior antenna location planning methods and strategies might make the cell edge field strength on the basis of the minimum required to achieve a more uniform coverage.