王瑞峰, 席皓哲, 姚军娟, 吝天锁, 郭博迪, 臧浩月. 基于位置信息与波束赋形辅助的LTE-R切换算法研究[J]. 云南大学学报(自然科学版), 2019, 41(6): 1137-1143. doi: 10.7540/j.ynu.20190190
引用本文: 王瑞峰, 席皓哲, 姚军娟, 吝天锁, 郭博迪, 臧浩月. 基于位置信息与波束赋形辅助的LTE-R切换算法研究[J]. 云南大学学报(自然科学版), 2019, 41(6): 1137-1143. doi: 10.7540/j.ynu.20190190
WANG Rui-feng, XI Hao-zhe, YAO Jun-juan, LIN Tian-suo, GUO Bo-di, ZANG Hao-yue. Research on LTE-R handover algorithm based on location information and beamforming assistance[J]. Journal of Yunnan University: Natural Sciences Edition, 2019, 41(6): 1137-1143. DOI: 10.7540/j.ynu.20190190
Citation: WANG Rui-feng, XI Hao-zhe, YAO Jun-juan, LIN Tian-suo, GUO Bo-di, ZANG Hao-yue. Research on LTE-R handover algorithm based on location information and beamforming assistance[J]. Journal of Yunnan University: Natural Sciences Edition, 2019, 41(6): 1137-1143. DOI: 10.7540/j.ynu.20190190

基于位置信息与波束赋形辅助的LTE-R切换算法研究

Research on LTE-R handover algorithm based on location information and beamforming assistance

  • 摘要: 针对高速铁路LTE网络切换成功率未被充分提升的问题,提出一种基于位置信息与波束赋形辅助的切换算法. 首先通过接收信号波达角(Direction of Arrival, DoA)和邻区列表快速锁定目标小区;然后将波束赋形引入高铁的切换重叠区,以产生不同的波束赋形增益服务于不同的区域;最后计算出预触发起点位置和触发位置,并分别执行信道资源的预分配和触发判断任务. 由实验结果表明,改进算法相比于传统切换算法和提前切换算法,在列车处于相同位置时有更高的切换成功率,可更好地适应高速铁路环境.

     

    Abstract: Aiming at the problem that the success rate of high-speed railway LTE network handover is not fully improved, a handover algorithm based on location information and beamforming assistance is proposed. Firstly, the target cell is quickly locked by receiving the direction of arrival (DoA) and the neighbor list. Then, the beamforming is introduced into the high-rail handover overlap region to generate different regions of different beamforming gain services. Finally, calculate the pre-trigger start position and trigger position, and the task of allocating channel resources in advance and trigger judgment are performed respectively. The experimental results show that the improved algorithm has higher handovering success rate when the train is in the same position compared with the traditional handovering algorithm and the early handovering algorithm, which can better adapt to the high-speed railway environment.

     

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