产品名称Productname密级ConfidentialitylevelG3BSC内部公开产品版本ProductversionTotal29pages共29页GSMBSS网络性能KPI（TCH掉话率）优化手册(仅供内部使用）Forinternaluseonly拟制：PreparedbyWCDMA&GSM性能研究部苏世日期：Date2008-6-28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Allrightsreserved目录1TCH掉话率定义说明..............................................................................................................61.1TCH掉话率含义..........................................................................................................61.2推荐公式......................................................................................................................61.3信令流程及统计点.......................................................................................................72涉及特性..................................................................................................................................93影响TCH掉话率的因素.......................................................................................................103.1硬件故障....................................................................................................................103.2传输问题....................................................................................................................113.3版本升级....................................................................................................................113.4参数设置问题............................................................................................................113.5网内外干扰................................................................................................................123.6覆盖问题....................................................................................................................123.7天馈问题....................................................................................................................133.8上下行不平衡............................................................................................................133.9直放站问题................................................................................................................134TCH掉话率分析流程和优化方法........................................................................................134.1分析流程图................................................................................................................134.2TCH掉话率问题定位及优化方法说明....................................................................154.2.1检查TCH掉话率较高的小区的硬件故障情况...........................................154.2.2检查TCH掉话率较高的小区的传输情况...................................................164.2.3检查是否是BSC版本和BTS版本升级引入的问题...................................174.2.4检查是否是MSC割接引入的问题..............................................................174.2.5分析TCH掉话率较高的小区的参数配置情况...........................................194.2.6分析TCH掉话率较高的小区的干扰情况...................................................234.2.7检查TCH掉话率较高的小区的覆盖情况...................................................244.2.8检查TCH掉话率较高的小区...
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