一种面向高速铁路通信的改进型基站切换优化算法  

An Improved Base Station Switching Optimized Algorithm for High Speed Railway Communication

作　　者：翟晨辉 梁中华[1] 辛月 白依梦 ZHAI Chenhui;LIANG Zhonghua;XIN Yue;BAI Yimeng(School of Information Engineering,Chang'an University,Xi'an 710064)

机构地区：[1]长安大学信息工程学院,西安710064

出　　处：《计算机与数字工程》2020年第2期327-332,355,共7页Computer & Digital Engineering

基　　金：国家自然科学基金面上项目“3D空间中的图像逆投影及车辆目标检测跟踪”(编号:61572083)资助。

摘　　要：在基于长期演进(Long-Term Evolution,LTE)技术的高速铁路(High-Speed Rail,HSR)通信中,信号的不稳定及频繁的切换给无线通信服务质量(Quality of Services,QoS)造成严重影响,时常发生掉话现象,从而导致通信中断。前、后天线的多次切换可有效解决通信服务质量问题,但是并没有考虑到前、后天线的综合利用率,以及何时将后天线加入切换,并与前天线并行完成多次切换问题。因此,论文提出一种改进型基站切换优化算法,即将检测到的最佳QoS的后天线即刻加入切换,与前天线并行完成多次切换,否则仅利用前天线独自完成多次切换,来提高天线的综合利用率问题,并对改进算法进行性能分析。实验仿真结果显示通信中断概率和切换失败概率均明显降低,得出论文算法可有效改善天线的综合利用率和提升基站切换性能。In the High-Speed Rail(HSR)communication based on Long-Term Evolution(LTE)technology,the unstable signal and frequent handover cause serious influence on the Quality of Services(QoS)of wireless communication,and therefore often resulting in call drop and communication outage. Multiple switching of front and rear antennas can effectively solve the problem of poor communication service quality,but it does not consider the comprehensive utilization rate of front and rear antennas,as well as when to add back antenna to handover,and complete multiple switching in parallel with front antenna. Therefore,in order to improve the comprehensive utilization of the antenna,this paper proposes an improved base station handover optimization algorithm,which is to join the handover of the rear antenna with the detected optimal QoS immediately and complete multiple handover in parallel with the front antenna,otherwise the front antenna alone completed multiple handover,and conduct performance analysis of the improved algorithm in the end. The simulation results show that the probability of communication outrage and the probability of handover failure can be significantly reduced by using the improved algorithm.

关 键 词：LTE 基站切换 掉话 切换失败概率 通信中断概率 

分 类 号：TN929.5[电子电信—通信与信息系统]