5GC基础自学系列 | 5GC基础之：计算与存储资源的解耦

Posted 2022-03-25 COCOgsta

视频来源：51学通信《5G核心网基础、协议与信令流程》

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附上汇总贴：5GC基础自学系列 | 汇总 - 知乎 (zhihu.com)https://zhuanlan.zhihu.com/p/484677694

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主要内容

介绍计算与存储解耦的优势和概念

介绍UDSF网元的功能

介绍了结构化和非结构化数据的概念

举例说明有UDSF网元时的AMF容灾流程

基本概念：规范中的出处

计算与存储解耦的雏形：无盘工作站

背景：4G中的困扰 - MME的容灾问题

修补方案：MME集群

5GC解决方案：UDSF

AMF的容灾方案（已部署UDSF）

AMF的容灾方案（规范出处）

In the case that an AMF fails and the 5G-AN/peer CP NFs detect that the AMF has failed, or the 5G-AN/peer CP NFs receives notification from another AMF in the same AMF set that this AMF has failed, following actions are taken:

• The OAM deregister the AMF from NRF indicating due to AMF failure.
• 5G-AN marks this AMF as failed and not consider the AMF for selection until explicitly notified.
• When the 5G-AN or CP NFs need to select a different AMF from the same AMF set.
• For deployments with UDSF, and AMF from the same AMF set can be selected.

Following actions should be taken by the newly selected AMF:

• For deployments with UDSF, when there is a transaction with the UE the newly selected AMF retrieves the UE context from the UDSF using SUPI, 5G-GUTI or AMF UE NGAP ID and it processes the UE message accordingly and updates the 5G-GUTI towards the UE, if necessary.

非结构化数据 vs 结构化数据

Structured data in this specification refers to data for which the structure is defined in 3GPP specifications. Unstructured data refers to data for which the structure is not defined in 3GPP specifications. -- 23.501

【结构化数据特指3GPP规范中明确定义了结构的数据，非结构数据则未明确定义】

UDSF数据库软件的选择