GSM-R网络切换掉话的分析与处理  

Analysis and solutions of call-drop caused by handover dropping in GSM-R network

作　　者：李坚[1] 刘志明[2] 王仲贞[3] 杨为国[3] 闫慧霞[3] 张全盛[3] 赖乾玲[3] 

机构地区：[1]北京铁路局电务处,北京100860 [2]北京交通大学电子信息工程学院,北京100044 [3]北京铁路局北京通信段,北京100061

出　　处：《北京交通大学学报》2011年第5期38-43,共6页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金资助项目(19771070)

摘　　要：为解决石太客运专线GSM-R网络的切换掉话的问题.利用话务统计分析、路测与动态测试等网络优化方法,对网络所用切换算法和光纤直放站对基站接收性能的影响进行了理论研究.分析结果确定,切换掉话原因为网络场强覆盖不合理和光纤直放站的上行增益过高造成的.本文采用调整相邻小区天线俯仰角和下调直放站上行增益的方法,实现了两个小区之间的正常切换,解决了该切换掉话的问题.Considering a case of call drop happened when switching between two cells in GSM-R network of Shi-Tai passenger dedicated railway, With several network optimization methods, such as traffic statistics analysis, drive test and dynamic test, and then investigating the handover algorithm and impacts of optical repeater station to base station receptivity, it comes to the conclusion that the reasons of the problem are as follows： The network field coverage is unconscionable; the uplink gain of optical repeater stations belonged to one cell is exceeded. By adjusting the inter-cell antenna elevation angle and the uplink gain of those optical repeater stations, the normal handover between those cells is realized and the problem of call drop is solved successfully.

关 键 词：铁路移动通信系统(GSM—R) 光纤直放站 切换 网络优化 

分 类 号：U285.21[交通运输工程—交通信息工程及控制]