WCDMARNP掉话问题分析.doc资源-CSDN文库

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目 录
概述............................................................................................................................................6
掉话分类定义..............................................................................................................................6
1  路测掉话定义.........................................................................................................................6
2  话统指标.................................................................................................................................6
3  工具中的定义.........................................................................................................................8
掉话分析流程及方法...................................................................................................................8
1  常见掉话原因.........................................................................................................................8
1.1  邻区漏配...........................................................................................................................8
1.2  覆盖差..............................................................................................................................9
1.3  切换导致的掉话..............................................................................................................10
1.4  干扰导致的掉话..............................................................................................................11
1.5  流程交互失败.................................................................................................................11
1.6  异常分析.........................................................................................................................11
 路测数据分析流程......................................................................................................................12
2  话统数据分析流程................................................................................................................15
3  跟踪数据分析流程................................................................................................................19
4  告警数据分析流程................................................................................................................21
5  用户投诉分析流程................................................................................................................21
6  调整措施...............................................................................................................................22
6.1  工程参数.........................................................................................................................22
6.2  小区参数.........................................................................................................................23
典型掉话分析............................................................................................................................29
1  邻区漏配...............................................................................................................................29
1.1  现象和分析.....................................................................................................................29
1.2  解决方法.........................................................................................................................30
2  覆盖太差...............................................................................................................................30
2.1  现象和分析.....................................................................................................................30
2.2  解决办法.........................................................................................................................31
3  干扰过强...............................................................................................................................31
3.1  导频污染.........................................................................................................................31
3.2  上行干扰导致的掉话.......................................................................................................38
4  软切换掉话...........................................................................................................................41
4.1  拐角效应.........................................................................................................................41
4.2  针尖效应.........................................................................................................................44
4.3  主导小区变化过快..........................................................................................................45
5  硬切换掉话...........................................................................................................................46
5.1  压缩模式启动太迟..........................................................................................................46
6  系统间切换掉话....................................................................................................................46
6.1  邻区漏配导致掉话..........................................................................................................46
6.2  异系统邻区配置过多导致掉话........................................................................................47
6.3  LAC配置错误导致的掉话................................................................................................48
6.4  UE不报测量报告导致掉话..............................................................................................48
6.5  切换不及时导致掉话.......................................................................................................49
6.6  物理信道重配置时发生最优小区变更导致掉话...............................................................51
6.7  UE回切换失败导致掉话..................................................................................................52
6.8  压缩模式启动太迟..........................................................................................................53
7  设备异常掉话.......................................................................................................................53
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图目录 List of Figures
图1 掉话分析流程图......................................................................................................................12
图2 掉话分析判决树......................................................................................................................14
图3 呼叫跟踪分析流程..................................................................................................................19
图4 用户投诉处理流程..................................................................................................................21
图5 掉话前的手机记录的活动集EcIo变化情况..............................................................................29
图6 掉话前Scanner记录的活动集EcIo变化情况...........................................................................30
图7 覆盖差信号分析......................................................................................................................31
图8 育兴路附近导频污染..............................................................................................................32
图9 育兴路附近best server...........................................................................................................32
图10 育兴路附近2th best server...................................................................................................33
图11 育兴路附近3th best server...................................................................................................33
图12 育兴路附近4th best server...................................................................................................34
图13 育兴路导频污染构成............................................................................................................34
图14 育兴路附近的RSSI...............................................................................................................35
图15 育兴路附近BestServer小区的RSCP....................................................................................35
图16 育兴路附近270号小区的RSCP............................................................................................36
图17 优化后育兴路附近的导频污染..............................................................................................37
图18 优化后育兴路附近的best server..........................................................................................37
图19 优化后育兴路附近的的best server小区的RSCP..................................................................38
图20 优化后育兴路附近270号小区的RSCP.................................................................................38
图21 上行干扰-RNC信令..............................................................................................................39
图22 上行干扰-UE信令.................................................................................................................39
图23 上行干扰-手机记录的信息....................................................................................................40
图24 89767的RTWP变化情况......................................................................................................40
图25 89768的RTWP变化情况......................................................................................................41
图26 拐角效应-信号变化情况........................................................................................................42
图27 拐角效应-手机记录的信号变化.............................................................................................42
图28 拐角效应-RNC记录的信令跟踪............................................................................................43
图29 针尖效应-信号变化情况........................................................................................................44
图30 PS384K同频硬切换掉话分布...............................................................................................45
图31 cell52 vs cell88信号分布（切换区信号波动）.....................................................................46
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