GSM BSS 网络性能切换成功率优化

GSMBSS网络性能KPI（切换成功率）优化手册内部公开2020-1-172:11:24AM华为机密，未经许可不得扩散第1页,共26页1产品名称Productname密级ConfidentialitylevelGSMBSS内部公开产品版本ProductversionTotal14pages共14页V00R01GSMBSS网络性能KPI（切换成功率）优化手册(仅供内部使用）Forinternaluseonly拟制：PreparedbyGSM&UMTS性能研究部董璇日期：Date2008-4-23审核:Reviewedby日期：Dateyyyy-mm-dd审核:Reviewedby日期：Dateyyyy-mm-dd批准:Grantedby日期：Dateyyyy-mm-dd华为技术有限公司HuaweiTechnologiesCo.,Ltd.版权所有侵权必究AllrightsreservedGSMBSS网络性能KPI（切换成功率）优化手册内部公开2020-1-172:11:24AM华为机密，未经许可不得扩散第2页,共26页2修订记录RevisionRecord日期Date修订版本Revisionversion修改描述changeDescription作者Author2008-4-230.88初稿完成董璇2008-7-301.0更新流程图董璇2009-8-181.1增加KPI优化涉及的功能列表付霞GSMBSS网络性能KPI（切换成功率）优化手册内部公开2020-1-172:11:24AM华为机密，未经许可不得扩散第3页,共26页3GSMBSS网络性能KPI（切换成功率）优化手册关键词：切换成功率摘要：本文主要从B侧来分析影响切换成功率的各种因素，通过对各要素的分析，找到一条快速定位切换成功率低以及切换慢问题的方法，并给出针对性的优化该指标的措施，满足一线工程师解决切换问题的工作需求。主要目的用于网络性能KPI指标优化以及网络质量的监控。Keywords：HOSR、缩略语清单Listofabbreviations：Abbreviations缩略语Fullspelling英文全名Chineseexplanation中文解释HOSRHandoversuccessrate切换成功率MSMobileStation移动台BSCBaseStationController基站控制器MRMeasurereport测量报告BQBadQuality质量差TATimingAdvance时间提前量BSICBaseStationIdentityCode基站色码BCCHBroadcastControlCHannel广播控制信道AMRAdaptiveMultiRate自适应多速率编码RQIRadioQualityIndication无线质量指示GSMBSS网络性能KPI（切换成功率）优化手册内部公开2020-1-172:11:24AM华为机密，未经许可不得扩散第4页,共26页4目录1基本原理...................................................................................................................................61.1指标含义.......................................................................................................................61.2理论介绍.......................................................................................................................61.3推荐公式.......................................................................................................................61.4信令流程及统计点.......................................................................................................72影响切换成功率的因素.........................................................................................................103切换成功率分析流程和优化措施.........................................................................................103.1切换问题的分析流程.................................................................................................103.1.1通用切换问题定位流程......................................................................................103.2切换问题的优化方法介绍...........................................................错误!未定义书签。3.2.1切换问题分类......................................................................................................123.2.2硬件和传输故障..................................................................................................133.2.3数据配置不当......................................................................................................143.2.4目标小区拥塞......................................................................................................163.2.5时钟问题..............................................................................................................183.2.6干扰问题..............................................................................................................193.2.7覆盖问题及上下行平衡......................................................................................203.2.8BSC间/MSC间切换失败.................................................................................213.2.9自动邻区优化......................................................................................................213.2.10测试工具选择及测试建议..................................................................................233.2.11现网测试配置建议..............................................................................................234切换成功率优化案例.............................................................................................................234.1解不出BSIC码无法切换案例..................................................................................234.2MS和BSC对频点排序不一致导致无法切换案例.................................................234.3参数配置不合理导致无法切换案例.........................................................................234.4HandoverRequest如果不包含类标3，导致BSC入切换失败次数增加案例......244.5A接口阶段标志配置错误导致入BSC切换失败....................................................244.6打开空闲burst导致干扰增大接收质量下降切换成功率低...................................244.7不同交换机下发清除命令携带原因值不同导致切换成功率差异.........................255问题信息反馈.........................................................................................................................255.1反馈问题小区的TEMS测试log..............................................................................255.2现网配置数据以及话统反馈要求.............................................................................25表目录表1切换常用定时器列表....................................................................................................................15GSMBSS网络性能KPI（切换成功率）优化手册内部公开2020-1-172:11:24AM华为机密，未经许可不得扩散第5页,共26页5图目录图1BSC内切换过程..............................................................................................................................7图2BSC间切换过程.........................................................