The dropped-call probability caused by handoff in high speed network environment was analyzed without considering the impact of Doppler effects on dropped-call probability. Starting from the study of handoff in high speed network, the handoff probability in different positions was deduced, and the dropped-call probability in different positions was gained to propose a model of dropped-call probability analysis. The dropped-call probability in GSM-R and LTE-R was simulated. The average dropped-call probability in LTE-R is about 29.23% lower than GSM-R. The dropped-call probability with different train through loss was simulated. The larger the train through loss is, the higher the dropped-call probability is. The average dropped-call probability can rise to 0.8% when train through loss is 24 dB. The dropped-call probability with different train speed was simulated. The faster the train speed is, the higher the dropped-call probability is. The average dropped-call probability with the speed of 540 km/h is 151.56% higher than the speed of 60 km/h. The dropped-call probability with fault base station was simulated. The average dropped-call probability with normal base station is just 36.3% of the condition with a fault base station.
WU Duan-po, JIN Xin-yu, JIANG Lu-rong, OUYANG-Bo. Dropped-call probability in high speed railway environment. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2015, 49(4): 705-710.
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