Research on the double-threshold decision algorithm in a high-speed handover scenario
Traditional handover algorithms cannot cope with the increasing demand for communication quality owing to the increase in high-speed trains.Therefore,a position-triggered handover algorithm based on double-threshold decision is proposed to enhance the communication quality during handovers between different areas.By selecting double-threshold values,it can effectively reduce the impact of signal strength fluctuations.The smaller threshold value will be used when the fluctuation of the received signal strength is small;otherwise,the larger threshold value will be used.Real-time,continuous dual decisions are made for each measurement result.Simulation results reveal that compared with traditional handover algorithms,the double-threshold decision algorithm can make handovers oc-cur near the midpoint of the overlapping area of base stations,thereby reducing the handover drop and failure rate.Moreover,the dual decision reduces the average number of handovers,greatly improving the communication experi-ence.
handoverLTE-Rtrain communication systemdouble-threshold decisioncall drop ratehandover failure rateperformance simulationdynamic detection
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