基于灰色预测的LTE-R越区切换算法  

LTE-R Handover Algorithm Based on Grey Prediction

作　　者：温强 李积英[1,2] 杨永红 王磊 Wen Qiang;Li Jiying;Yang Yonghong;Wang Lei(School of Electronic and Information Engineering,Lanzhou Jiaotong University,Lanzhou,Gansu 730070,China;Gansu Research Center of Automation Engineering Technology for Industry&Transportation,Lanzhou,Gansu 730070,China;School of Traffic and Transportation,Lanzhou Jiaotong University,Lanzhou,Gansu 730070,China)

机构地区：[1]兰州交通大学电子与信息工程学院,甘肃兰州730070 [2]甘肃省工业交通自动化工程技术研究中心,甘肃兰州730070 [3]兰州交通大学交通运输学院,甘肃兰州730070

出　　处：《激光与光电子学进展》2020年第19期55-63,共9页Laser & Optoelectronics Progress

基　　金：中国铁路总公司科技研究开发计划(2016X003-H)。

摘　　要：针对高速铁路LTE-R(long term evolution for mobile communications-railway)越区切换过程中,基于A3事件判决的越区切换算法容易出现乒乓切换频繁和切换成功率较低的问题,提出了基于改进的模糊预测优化切换算法。该算法对切换过程中的参考信号接收功率(RSRP)进行采集,并通过改进的GM(1,1)灰色预测算法对采集的RSRP值进行优化处理,处理之后的测量参数值经3次循环预测和加权平均后,被送入判决公式进行判决。在MATLAB上的仿真结果表明所提算法降低了切换过程中的参数波动值,从而减少了乒乓切换的次数,提高了越区切换的成功率。For the high-speed railway LTE-R(long term evolution for mobile communications-railway)handover process,the handover algorithm based on the A3 event decision is prone to frequent ping-pong handovers and has low handover success rate.An optimized handover algorithm based on improved fuzzy prediction is proposed in this work.In this algorithm,the reference signal received power(RSRP)in the handover process is collected,and the collected RSRP value is optimized by the improved GM(1,1)grey prediction algorithm.After the three cycle prediction and weighted average,the measured parameter values are sent to the decision formula for judgment.Simulation results of the algorithm in MATLAB show that the proposed algorithm reduces the parameter fluctuation in the process of handover,thus reducing the number of ping-pang handovers and improving the success rate.

关 键 词：光通信 LTE-R 测量参数 灰色预测 乒乓切换 切换成功率 

分 类 号：U284.76[交通运输工程—交通信息工程及控制] TP39[交通运输工程—道路与铁道工程]