高速铁路TD-LTE系统切换参数优化研究

Fast handover algorithm for TD-LTE-A system in high speed railway

针对高速铁路TD-LTE系统切换率低、丢包严重的问题展开研究。分析了目前高速铁路TD-LTE存在的普遍问题,建立了高铁TD-LTE系统越区切换参数优化的数学模型,将TD-LTE切换参数优化的问题转化为链式分布条件下相邻小区之间切换的最佳切换位置与平均切换次数之间折中的问题。通过仿真对不同的信道条件下不同参数的性能做了分析比较,为后续高速铁路TD-LTE专网优化奠定了理论基础。

Aiming at the low handover rate and serious packet loss in high-speed railway TD-LTE system,this paper studies the problem.Analysis of the common problems in the high-speed railway TD-LTE,established the handoff parameter optimization model of high iron TD-LTE,TD-LTE switching parameter optimization problem into the optimal switching position between the switch between the chain distribution condition of adjacent cells and the average number of times of switching compromise.Through simulation,the performance of different parameters under different channel conditions is analyzed and compared,which lays a theoretical foundation for the optimization of the TD-LTE private network of the high-speed railway.