Optimization Research Of Subway Station TD-LTE Wireless Network Coverage

In recent years,with the increasing number of new subway lines in developed and developing cities,more and more mobile communication services have transferred from outdoor to the basement scene,the subway communication has its special features,and it's different from general indoor coverage.At the same time,with mobile communication technology unceasingly updating,4G network has covered people's living area gradually.However,because of subway's high traffic,heavy business work and complex building structure,there is a big loophole in 4G signal covering,it's unable to meet the communication needs of passengers.Because of TD-LTE's flexible bandwidth allocation,China Mobile's TD-LTE 4G standard has the most users.Based on this,in order to solve the 4G covering problems in the subway station,this thesis researched TD-LTE wireless network optimization,came up with a wireless resource allocation algorithm for scheduling optimization,proposed priority-based scheduling concepts,and designed a game model based on distance for scheduling priority.Firstly,this thesis introduced the research background and significance,analyzed the development of the 4G covering on subway,proved that subway station TD-LTE wireless network coverage optimization has theoretical and practical value.Secondly,this thesis analyzed special architectural structure and coverage of the subway scene,summed up the factors of TD-LTE wireless network covering,clarified that TD-LTE radio resource management optimization is feasible,and briefly introduced of LTE RRM system and frequency resources.Then,according to subway communication features,such as it's mobility,user's constantly changing location,channel condition's fluctuations,this thesis gamed the concurrent users by distance,and took relevant scheduling priority,and improved scheduling allocation algorithm based on the priority,combined with resource management and service type,optimized the TD-LTE system based on distance Game PF utility function.Finally,this thesis finished the LTE system level simulation,and comparisoned with the other three classical algorithms,the result shows that the improved algorithm is better than the other three traditional algorithms in system throughput and user fairness,so the limited resources of TD-LTE system can cover more active users,and ultimately achieve the subway station TD-LTE wireless network coverage optimization.