| GSM-R网络切换掉话的分析与处理 |
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| 引用本文： | 李坚,刘志明,王仲贞,杨为国,闫慧霞,张全盛,赖乾玲.GSM-R网络切换掉话的分析与处理[J].北方交通大学学报,2011(5):38-43. |
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| 作者姓名： | 李坚 刘志明 王仲贞 杨为国 闫慧霞 张全盛 赖乾玲 |
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| 作者单位： | [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 |
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| 基金项目： | 基金项目：国家自然科学基金资助项目（19771070） |
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| 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．
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| 关 键 词： | 铁路移动通信系统（GSM—R） 光纤直放站 切换 网络优化 |
Analysis and solutions of call-drop caused by handover dropping in GSM-R network |
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| LI Jian,LIU Zhiming,WANG Zhongzhen,YANG Wgiguo,YAN Huixia,ZHANG Quansheng,LAI Qianling.Analysis and solutions of call-drop caused by handover dropping in GSM-R network[J].Journal of Northern Jiaotong University,2011(5):38-43. |
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| Authors: | LI Jian LIU Zhiming WANG Zhongzhen YANG Wgiguo YAN Huixia ZHANG Quansheng LAI Qianling |
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| Institution: | 1. Department of Communication and Signalling, Beijing Railway Bureau, Beijing 100860, China; 2. School of Electronics and Information Engineering, Beijing Jiaotong University, Beijing 100044, China; 3. Beijing Communication Section, Beijing Railway Bureau, Beijing 100061 ,China) |
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| Abstract: | 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. |
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| Keywords: | global system for mobile communications for railways （GSM-R） optical repeater station handover network optimization |
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