Performance Optimization of the Fast Handover Technology of Wireless Network Based on Terminal Position in High-Speed Railway

Founded on the theory of mobility management, the terminal position in the high-speed train is studied by a large number of parameter measurement under lens antenna. In accordance with the analysis of synchronous reference signal receiving power, synchronous reference signal receiving quality and terminal position, a reasonable handover mode is selected by calculating the running speed and direction of high-speed train, and the forward or reverse handover chain is identified accordingly. After calculating the location information, it can determine whether the terminal has entered the preset handover identification zone. When the difference between the weight of the neighboring cell and that of the serving cell is greater than the threshold, the command of handover is triggered instantly. Compared with the current handover technology, the delay of the fast handover is reduced over 8.69%, the failure probability of the fast handover is reduced by at least 11.24%, and the probability of communication interruption is severally improved by more than 11.71% based on lens antenna and terminal position when the train is running at 300 km/h.