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Adaptive Handover Algorithm for LTE-R System in High-Speed Railway Scenario

机译:高速铁路场景中LTE-R系统的自适应切换算法

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摘要

With the rapid development of high-speed railway, the LTE-R communication system has more requirements for the handover success rate. An adaptive handover algorithm based on random suppression in high-speed railway scenario is proposed. The algorithm establishes an elliptic function relationship between the hysteresis threshold and the train speed, so that the hysteresis threshold can be adjusted adaptively with the train speed, which lessens the challenge of high-speed train forward handover. At the same time, the normal distribution random number is introduced to suppress the reverse handover in order to reduce the ping-pong handover rate. Finally, the effectiveness of the algorithm is verified in different scenarios. Simulation results show that compared with the traditional A3 algorithm, the proposed adaptive handover algorithm based on random suppression can improve the handover trigger probability and handover success probability and avoid the increase of ping-pong handover rate.
机译:随着高速铁路的快速发展,LTE-R通信系统对切换成功率有更多的要求。提出了一种基于高速铁路场景中随机抑制的自适应切换算法。该算法在滞后阈值和列车速度之间建立椭圆形函数关系,从而可以随着列车速度自适应地调整滞后阈值,这减少了高速列车前进切换的挑战。同时,引入正常分布随机数以抑制反向切换,以降低ping-pong切换率。最后,在不同的场景中验证了算法的有效性。仿真结果表明,与传统A3算法相比,基于随机抑制的提出的自适应切换算法可以提高切换触发概率和切换成功概率,避免平乒过程的增加。

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