An Adaptive Handover Trigger Scheme for Wireless Communications on High Speed Rail
Handover triggered probability is the probability of handover triggered before the train arrives at a specific position. A low handover triggered probability at the cell edge will result in serious communication interruptions and call drops. This paper analyzes the impact of overlapped area and user measurement report period on the performance of handover triggered probability. Moreover, an adaptive handover trigger scheme is proposed to guarantee a high handover triggered probability by configuring overlapped area and measurement report period adaptively according to the train speed. Numerical and simulation results are provided. It is shown that analytical results are close to the simulations.