TCH切换成功率低故障处理案例.docx

由于时钟参考源异常而导致TCH切换成功率低故障处理案例的案例分析问题出现时间：2012-08-29案例分析人员：何山*******************************************************************************1. 问题现象描述 ：查看切换指标发现BGA316忙时入小区切换失败次数比较多，达到100多次，而且近期一直不好。具体指标如下所示：起始时间GCELLCH323:BSC内入小区切换成功次数(无)CH322:BSC内入小区切换失败次数(无)RH303:切换成功率(无)TH323:BSC内入小区切换成功率(无)08/27/2011 18:00:00BGA316A746082.02255.22408/27/2011 19:00:00BGA316A587181.7244.96108/27/2011 20:00:00BGA316A7111076.66739.22708/28/2011 18:00:00BGA316A658979.26842.20808/28/2011 19:00:00BGA316A926488.858.97408/28/2011 20:00:00BGA316A6012989.70631.74608/29/2011 18:00:00BGA316A443880.39253.65908/29/2011 19:00:00BGA316A668282.14344.59508/29/2011 20:00:00BGA316A538782.14337.85708/27/2011 18:00:00BGA316B776678.94753.84608/27/2011 19:00:00BGA316B1017879.20856.42508/27/2011 20:00:00BGA316B549164.76237.24108/28/2011 18:00:00BGA316B865275.45562.31908/28/2011 19:00:00BGA316B9117681.89734.08208/28/2011 20:00:00BGA316B677581.91547.18308/29/2011 18:00:00BGA316B899187.96349.44408/29/2011 19:00:00BGA316B871008746.52408/29/2011 20:00:00BGA316B9111277.04944.82808/27/2011 18:00:00BGA316C6814476.13632.07508/27/2011 19:00:00BGA316C437384.44437.06908/27/2011 20:00:00BGA316C603285.71465.21708/28/2011 18:00:00BGA316C398290.47632.23108/28/2011 19:00:00BGA316C314486.66741.33308/28/2011 20:00:00BGA316C563091.07165.11608/29/2011 18:00:00BGA316C421993.93968.85208/29/2011 19:00:00BGA316C445489.36244.89808/29/2011 20:00:00BGA316C338378.37828.4482. 问题原因分析：3. 问题处理过程： （1）直放站故障导致通过直放站数据表核查此站带有直放站，下挂在A小区。通过MML命令查询小区软参，A小区已经设置了异步切换，因此排除是直放站同步切换导致的切换失败问题。通过查询点对点切换数据发现所有小区均存在往该站切换失败的现象，因此基本可以排除直放站故障问题。起始时间GCELL_GCELLNCIH380:入小区切换请求次数(无)H382A:入小区切换失败次数(拥塞)(无)H382M:入小区切换失败次数(其他)(无)H382:入小区切换失败次数(无)H383:入小区切换成功次数(无)RH383:入小区切换成功率(无)08/29/2011 09:00:00BGA316A4316234022221235.29408/29/2011 09:00:00BGA316A43163201115008/29/2011 09:00:00BGA316A431616044233.33308/29/2011 09:00:00BGA316A48652201115008/29/2011 09:00:00BGA316A486512000210008/29/2011 09:00:00BGA316A42671201115008/29/2011 09:00:00BGA316A431628033562.508/29/201