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SDCU SA保持性能分析优化指导书.pdf
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5G网络优化分析
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SDCU SA 保持性能分析优化指导书
Confidentiality Class
External Confidentiality Label
Document Type
Page
Ericsson Internal
Guideline
1 (13)
Prepared By (Subject Responsible)
Approved By (Document Responsible)
Checked
ELAHUIZ Zhaohe Liu
Document Number
Revision
Date
Reference
2020-12-02
Confidentiality Class
External Confidentiality Label
Document Type
Page
Ericsson Internal
Guideline
2 (13)
Prepared By (Subject Responsible)
Approved By (Document Responsible)
Checked
ELAHUIZ Zhaohe Liu
Document Number
Revision
Date
Reference
2020-12-02
目录
1 修订记录 ...................................................................................................................................... 3
2 SA 网络保持性指标定义........................................................................................................... 3
2.1 相关 counters 及打点机制................................................................................................. 3
3 SA 网络掉线相关判断流程 ...................................................................................................... 4
3.1 掉线信令流程 ........................................................................................................................ 4
3.1.1 上下文释放流程 .................................................................................................................... 4
3.1.2 PDU 会话释放流程 ................................................................................................................ 5
3.1.3 PDU 会话修改流程 .............................................................................................................. 5
3.2 掉线相关 counter 触发机制 ............................................................................................. 6
3.2.1 不活动定时器超时 ............................................................................................................... 6
3.2.2 重传超限 .................................................................................................................................. 7
3.2.3 上行失步 .................................................................................................................................. 8
3.2.4 下行失步 .................................................................................................................................. 8
4 SA 掉线相关的参数 .................................................................................................................... 9
5 SA 掉线原因分析处理 ............................................................................................................. 10
5.1 SA 掉线处理流程 ............................................................................................................... 10
5.1.1 利用 CTR 数据分析深入分析 ........................................................................................ 11
5.2 常见的掉线原因 ................................................................................................................. 12
5.2.1 网元故障 ............................................................................................................................... 12
5.2.2 弱覆盖 ................................................................................................................................... 12
5.2.3 过覆盖 ................................................................................................................................... 12
5.2.4 高干扰 ................................................................................................................................... 12
5.2.5 切换失败 ............................................................................................................................... 12
5.2.6 其他 ........................................................................................................................................ 13
6 典型问题案例........................................................................................................................... 13
Confidentiality Class
External Confidentiality Label
Document Type
Page
Ericsson Internal
Guideline
3 (13)
Prepared By (Subject Responsible)
Approved By (Document Responsible)
Checked
ELAHUIZ Zhaohe Liu
Document Number
Revision
Date
Reference
2020-12-02
1 修订记录
Revision
Owner
Reviewer
Date
Change
PA1
Zhaohe Liu
Evan Zhou /
Cassie Song
2020-12-02
First Preliminary Version
2 SA 网络保持性指标定义
QoS Flow 掉线率
(pmDrbRelAbnormalAmfAct5qi+pmDrbRelAbnormalGnbAct5qi)/
(pmDrbRelAbnormalAmf5qi+pmDrbRelAbnormalGnb5qi+pmDrbRelNormal5qi)
//目前版本 ENM 暂不支持
UE 上下文掉线率
(pmUeCtxtRelAbnormalAmf+ pmUeCtxtRelAbnormalGnb)/
(pmUeCtxtRelAbnormalAmf+pmUeCtxtRelAbnormalGnb+pmUeCtxtRelNormal)
2.1 相关 counters 及打点机制
Counters List:
Counter
作用
NRCELLCU. pmDrbRelAbnormalAmfAct5qi
Amf 异常释放的激活承载数,注:ENM20.07 support,当前不支持
NRCELLCU. pmDrbRelAbnormalGnbAct5qi
Gnb 异常释放的激活承载数,注:ENM20.07 support,当前不支持
NRCELLCU. pmDrbRelAbnormalAmf5qi
Amf 异常释放的非激活承载数
NRCELLCU. pmDrbRelAbnormalGnb5qi
Gnb 异常释放的非激活承载数
NRCELLCU. pmDrbRelNormal5qi
正式释放的承载数
NRCELLCU. pmUeCtxtRelAbnormalAmf
Amf 异常释放的上下文次数
NRCELLCU. pmUeCtxtRelAbnormalGnb
Gnb 异常释放的上下文次数
NRCELLCU. pmUeCtxtRelNormal
正常释放的上下文次数
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