覆盖客运专线车站的GSM-R小区内列车驻留时间分布模型

Modeling Train Residence Time Distribution within GSM-R Cell Covering Station in Passenger Dedicated Line

根据客运专线车站和GSM-R系统的特点,确定建模的基本条件。建立覆盖客运专线车站的GSM-R小区内列车驻留时间分布模型,包含新呼叫后不停站列车、切换呼叫后不停站列车、新呼叫后停站列车、切换呼叫后停站列车在GSM-R小区内的驻留时间分布模型。以GSM-R小区覆盖半径3 km、列车运行速度200～250 km.h-1为例,采用建立的模型进行仿真计算。仿真计算结果表明,覆盖客运专线车站的GSM-R小区内列车驻留时间分布特征显然与公网内小区驻留时间分布特征不同,因此不能采用负指数分布、伽玛分布等概率模型表达,而是应该根据车站和GSM-R系统的实际情况,采用给出的模型,通过仿真计算得到。

According to the characteristics of both the station in passenger dedicated line （SPDL） and the GSM-R system, the basic conditions are established for modeling the train cell residence time distribution （TCRTD） within a GSMR cell which covers a station in passenger dedicated line. In TCRTD model, there are four parts including non-stop train cell residence time distribution （with new call and handover call） and stop train ceil residence time distribution （with new call and handover call）. Given the radius of a GSM-R cell is 3 km and the speed of a train is 200-250 km·h^-1 , the simulation results are obtained which indicate that the TCRTD is obviously different from the mobile user cell residence time distribution which is usually modeled by negative exponential distribution or gamma distribution in public land mobile system. The TCRTD should be obtained by simulation under the real condition of both GSM-R system and SPDL.