一种基于速率阀值触发的智能切换算法

An Intelligent Switching Algorithm Based on Threshold Trigger

作为TD-LTE移动通信系统的核心技术,切换技术其算法很大程度上体现了用户在小区间进行移动通信的整体性能。而在高铁环境中,由于其环境的特殊性和复杂性,因此需要对高速铁路环境下LTE的切换技术和算法进行改进来保证高铁LTE网络的通信质量。设计了基于速率阈值的智能优化切换算法。通过对常规的系统A3事件切换判决准则的研究,提出了一种基于速率阈值的智能切换算法,该算法在获取用户终端(UE)的地理位置、速度等信息的基础上,通过采集在不同阈值范围内进行相应切换时刻与切换地理位置的确认,然后通过系统仿真,将该阈值智能切换算法与传统切换算法进行了性能对比,结果表明智能切换算法平均切换成功率达到93.1%以上,相比常规A3算法提高了6%以上。

As the core technology of TD-LTE mobile communication system,handover algorithm largely reflects the overall performance of mobile communication in small intervals.In the high-speed railway environment,because of the particularity and complexity of its environment,it is necessary to improve the handover technology and algorithm of LTE in the high-speed railway environment to ensure the communication quality of high-speed railway LTE network.An intelligent optimal switching algorithm based on rate threshold is designed.Based on the study of the conventional decision criterion of system A3 event handover,an intelligent handover algorithm based on rate threshold is proposed.This algorithm acquires the geographic location and speed of user terminal(UE),confirms the corresponding handover time and location in different threshold range,and then intelligently handover the threshold through system simulation.The performance of the proposed algorithm is compared with that of the traditional switching algorithm.The results show that the average handover success rate of the intelligent handover algorithm is over 93.1%,which is 6%higher than that of the conventional A3 algorithm.