基于通信仿真的手机切换扰动对车速误差影响

Mobile Communication Simulation Experiments on Influence of Mobile Phone Handover Fluctuation on Link Travel Speed Error

根据真实移动通信环境特征配置仿真参数,建立试验场景,运用Matlab软件实现仿真,将移动通信仿真手段交叉应用于分析交通行程车速采集误差问题.进行切换路测仿真,对试验道路进行切换标定,反复多次试验拟合发现各切换位置扰动服从正态分布规律,由此确定平均切换位置和切换路段长度;进行通信网络仿真,获取手机切换样本数据,利用样本切换时间差和切换路段长度,计算得到切换路段行程车速,将其与仿真试验设定的真实车速进行误差精度分析,从定量角度研究不同基站布局类型和切换控制准则2种主要影响切换扰动的因素对采样车速误差的影响.

The mobile communication simulation experiment scenario is built and the simulation parameters are configured according to the real circumstance.The simulation tool,Matlab,is applied to analyzing the link travel speed error.First,the handover link is calibrated by handover test simulation to specify the average handover location and the handover link length.The experiment result shows the handover fluctuation complies with the normal distribution.Second,the handover sample data with handover cell sequence and time stamp is acquired by mobile communication network simulation.Thus,the handover link travel speed is calculated by means of the calibrated handover link length and time difference of the sample.Third,the speed error is obtained from the calculated link travel speed and the readily configured mobile phone speed.The influence of handover fluctuation on collected sample speed error is studied in terms of cell type and handover control rules.