Research On Handover Algorithm And Simulation Platform For High-Speed Train

Handover technique, as one of the key techniques in TD-LTE mobile communication system, has a great influence on the inter-cell mobile communication by its algorithm. In the high-speed mobile environment with the speed of350km/h, the traditional handover algorithm can not meet the requirements of the system by the quality of service. Therefore, in the high-speed mobile environment, optimized and new handover algorithms are needed by the TD-LTE mobile communication system.In this paper, the optimized handover algorithm based on A3incident and the handover algorithm based on the location information are mainly discussed. The main contents of the paper are as follows:Do deeply into the knowledge of the LTE system architecture. Research on the system signaling processes of handover.Based on the LTE protocol and LTE-SIM protocol framework software, build a handover algorithm simulation platform, and add the scenes of the high-speed railway, network topology module, mobility module,3rd layer filter modules, handover algorithm module. Based on these, the simulation parameters are configured.Do research on the theory of traditional handover algorithm based on A3incident, and do the simulation of it on the simulation platform, including the packet dropping rate, the radio link failure rate, the ping-pong effect. Based on this traditional algorithm, propose an statistical algorithm, in which statistical threshold is used to replace the time to trigger, which can reduce the probability of radio link failure, and improve the system performance. On the simulation platform, the performance of the optimized algorithm is simulated, and is compared with the performance of traditional handover algorithm. Several advantages of the statistical algorithm are summarized. This statistical handover algorithm has a better performance in high-speed scene. Do research on the handover algorithm based on location information, and analyze the precondition, principle, signaling process of handover algorithm. On the simulation platform, the performance of this algorithm is simulated, and is compared with the performance of traditional handover algorithm. This algorithm has a better performance in high-speed scene.