Research On Optimization And Implementation Of Cellular Network In High-Speed Scenarios

The quality of communication decreases significantly in high-speed railway carriages due to the CRH tightness, fast fading, and high speed. The efficient coverage of communication network and smooth call become urgent tasks to be tackled. Traditional network planning and optimization principles can not meet the requirements in high-speed railway scenarios. An important topic is to research the technical solution for high-speed railway cellular network.High-speed has serious effect on the drop rate and the connection rate for wireless communication. This thesis starts from the coverage of high-speed railway wireless network, and focuses on the solution to the problems of low connection rate and high drop rate based on present network restructuring and optimization. With a large number of field tests and records, the thesis analyzes a variety of coverage solutions under different circumstances, the coverage requirement of high-speed railway, and the main factors that have effect on network quality. Then the goal of network coverage for high-speed railway and that of the network optimization, and a fiber pull-away solution are proposed. Considering the real existing application, this thesis further proposes a solution of direct fiber Technical proximal pull up station covering the original side, and gives the results in real application environment. By optimizing the coverage scheme and adjusting parameters for present network, the coverage quality for high-speed railway can achieve a comparable level to that of the general railway.The proposed solution and critical technique have been applied and tested in railway optimization. The results show that our proposed solution is useful for cellular network optimization in high-speed scenarios.