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GSM-R网络中共享中继增强型切换机制(英文)

, PP. 108-113

Keywords: 车地无线通信,信号传输质量,铁路综合移动数字通信系统,共享中继,干扰,切换成功率

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Abstract:

为了提高GSM-R系统的切换成功率,设计了一种共享中继增强型切换机制,利用共享中继改善相邻基站重叠区内来自目标基站的信号质量,明显区分不同基站的信号,减少信号波动导致的切换误判。仿真结果表明利用增强型切换机制将列车的切换触发地点提前约500m,从而保证列车在重叠区内具有足够的距离完成切换,并且由于信号质量的改善,减少了乒乓效应,将切换失败概率降低到10-6,提高了切换成功概率。同时,考虑到系统干扰的原因,共享中继不适用于频率复用因子小于2的网络。

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