W-(高培)掉话问题分析-20050316-A-2.0

WCDMA RNP 专题指导书 掉话问题分析 密级

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产品名称Product name WCDMA RNP 产品版本Product version 2.0 密级Confidentiality level 内部公开 Total 55pages 共55页 WCDMA RNP 专题指导书 掉话问题分析

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2004-10-25

华为技术有限公司 Huawei Technologies Co., Ltd.

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2005-02-01

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WCDMA RNP 专题指导书 掉话问题分析 密级

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修订记录Revision record

修订版本Revision version 2004-08-21 1.00 确定大纲 2004-10-20 1.10 2004-11-27 1.20 2004-12-12 1.30 2005-1-5 2005-1-18 1.31 1.40 完成初稿 根据评审意见修改 根据讨论，补充修改涉及话统部分 根据蔡建永意见，补充修改涉及话统部分 日期 Date 修改描述 change Description 作者 Author 蔡建永 蔡建永 蔡建永 贺美迅 贺美迅 2005-02-01 1.50 根据SUNDAY 3G 2G地铁切换优化报告，添加掉话蔡建永 案例 根据SUNDAY PhaseI PNAT KPI掉话分析更新 蔡建永 2005-02-01

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WCDMA RNP 专题指导书 掉话问题分析 密级

confidentiality level

目 录

1 概述 .......................................................................................................................................... 8 2 掉话分类定义 ............................................................................................................................ 8 2.1 路测掉话定义 ...................................................................................................................... 8 2.2 话统指标 ............................................................................................................................. 8 2.3 工具中的定义 .................................................................................................................... 10 3 掉话分析流程及方法 ............................................................................................................... 10 3.1 常见掉话原因 .................................................................................................................... 10 3.1.1 邻区漏配 ..................................................................................................................... 10 3.1.2 覆盖差 ......................................................................................................................... 11 3.1.3 切换导致的掉话 .......................................................................................................... 12 3.1.4 干扰导致的掉话 .......................................................................................................... 12 3.1.5 流程交互失败 .............................................................................................................. 13 3.1.6 异常分析 ..................................................................................................................... 13 3.2 路测数据分析流程 ............................................................................................................. 14 3.3 话统数据分析流程 ............................................................................................................. 16 3.4 跟踪数据分析流程 ............................................................................................................. 19 3.5 告警数据分析流程 ............................................................................................................. 21 3.6 用户投诉分析流程 ............................................................................................................. 21 3.7 调整措施 ........................................................................................................................... 23 3.7.1 工程参数 ..................................................................................................................... 23 3.7.2 小区参数 ..................................................................................................................... 23 4 典型掉话分析 .......................................................................................................................... 29 4.1 邻区漏配 ........................................................................................................................... 29 4.1.1 现象和分析 .................................................................................................................. 29 4.1.2 解决方法 ..................................................................................................................... 30 4.2 覆盖太差 ........................................................................................................................... 30 4.2.1 现象和分析 .................................................................................................................. 30 4.2.2 解决办法 ..................................................................................................................... 31 4.3 干扰过强 ........................................................................................................................... 31 4.3.1 导频污染 ..................................................................................................................... 31 4.3.2 上行干扰导致的掉话 ................................................................................................... 38 4.4 软切换掉话 ....................................................................................................................... 40 4.4.1 拐角效应 ..................................................................................................................... 40 4.4.2 针尖效应 ..................................................................................................................... 43 4.4.3 主导小区变化过快 ....................................................................................................... 44 4.5 硬切换掉话 ....................................................................................................................... 45 4.5.1 压缩模式启动太迟 ....................................................................................................... 45 4.6 系统间切换掉话 ................................................................................................................ 45 4.6.1 邻区漏配导致掉话 ....................................................................................................... 45 4.6.2 异系统邻区配置过多导致掉话 .................................................................................... 46 4.6.3 LAC配置错误导致的掉话 ............................................................................................ 46 4.6.4 UE不报测量报告导致掉话 .......................................................................................... 47 4.6.5 切换不及时导致掉话 ................................................................................................... 48 4.6.6 物理信道重配置时发生最优小区变更导致掉话 ........................................................... 50 4.6.7 UE回切换失败导致掉话 .............................................................................................. 51 4.6.8 压缩模式启动太迟 ....................................................................................................... 52 4.7 设备异常掉话 .................................................................................................................... 52 4.7.1 NodeB上行同步导致的掉话 ........................................................................................ 52 4.7.2 手机问题 ..................................................................................................................... 53

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WCDMA RNP 专题指导书 掉话问题分析 密级

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5 网优各阶段关注点 .................................................................................................................. 54 5.1 单站测试阶段 .................................................................................................................... 54 5.2 优化前评估阶段 ................................................................................................................ 54 5.3 RF优化阶段 ...................................................................................................................... 54 5.4 参数优化阶段 .................................................................................................................... 54 5.5 网优项目验收阶段 ............................................................................................................. 54 6 总结 ........................................................................................................................................ 54 7 参考文档列表 .......................................................................................................................... 55

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WCDMA RNP 专题指导书 掉话问题分析 密级

confidentiality level

表目录 List of Tables

表1 EcIo和Ec门限要求 .................................................................................................................. 11 表2 UU接口掉话相关定时器和计数器 ........................................................................................... 26 表3 Iub接口掉话相关定时器和计数器 ........................................................................................... 28

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