5G学习笔记之F1AP

参考资料：3Gpp 38.473

我就是个协议的搬运工~~~

1. F1AP服务

F1AP提供gNB-CU节点与gNB-DU节点之间的信令服务。服务分为两类：

• 非UE相关服务：在gNB-CU与gNB-DU之间建立F1接口实例。
• UE相关服务：为UE接入核心网提供信令和数据连接。
   

2. F1AP一般过程分类

（1）F1AP一般过程按是否有响应，可分为两类：

• Class 1：应答类消息，需要等待响应消息。

一般过程	发起消息	成功响应	失败响应
F1 Setup	F1 SETUP REQUEST	F1 SETUP RESPONSE	F1 SETUP FAILURE
Reset	RESET	RESET ACKNOWLEDGE
gNB-DU Configuration Update	GNB-DU CONFIGURATION UPDATE	GNB-DU CONFIGURATION UPDATE ACKNOWLEDGE	GNB-DU CONFIGURATION UPDATE FAILURE
gNB-CU Configuration Update	GNB-CU CONFIGURATION UPDATE	GNB-CU CONFIGURATION UPDATE ACKNOWLEDGE	GNB-CU CONFIGURATION UPDATE FAILURE
UE Context Setup	UE CONTEXT SETUP REQUEST	UE CONTEXT SETUP RESPONSE	UE CONTEXT SETUP FAILURE
UE Context Release (gNB-CU initiated)	UE CONTEXT RELEASE COMMAND	UE CONTEXT RELEASE COMPLETE
UE Context Modification (gNB-CU initiated)	UE CONTEXT MODIFICATION REQUEST	UE CONTEXT MODIFICATION RESPONSE	UE CONTEXT MODIFICATION FAILURE
UE Context Modification Required (gNB-DU initiated)	UE CONTEXT MODIFICATION REQUIRED	UE CONTEXT MODIFICATION CONFIRM	UE CONTEXT MODIFICATION REFUSE
Write-Replace Warning	WRITE-REPLACE WARNING REQUEST	WRITE-REPLACE WARNING RESPONSE
PWS Cancel	PWS CANCEL REQUEST	PWS CANCEL RESPONSE
GNB-DU RESOURCE COORDINATION	GNB-DU RESOURCE COORDINATION REQUEST	GNB-DU RESOURCE COORDINATION RESPONSE

• Class 2：通知类消息，无响应消息。

一般过程	消息	作用
UE Context Release Request (gNB-DU initiated)	UE CONTEXT RELEASE REQUEST
Initial UL RRC Message Transfer	INITIAL UL RRC MESSAGE TRANSFER
DL RRC Message Transfer	DL RRC MESSAGE TRANSFER
UL RRC Message Transfer	UL RRC MESSAGE TRANSFER
UE Inactivity Notification	UE INACTIVITY NOTIFICATION
System Information Delivery	SYSTEM INFORMATION DELIVERY COMMAND
Paging	PAGING
Notify	NOTIFY
Error Indication	ERROR INDICATION
PWS Restart Indication	PWS RESTART INDICATION
PWS Failure Indication	PWS FAILURE INDICATION
gNB-DU Status Indication	GNB-DU STATUS INDICATION
RRC Delivery Report	RRC DELIVERY REPORT

（2）F1AP一般过程按功能分类，大致可以分为以下6类：

功能	过程
接口管理	Reset F1 Setup Error Indication gNB-DU Configuration Update gNB-CU Configuration Update gNB-DU Resource Coordination gNB-DU Status Indication
UE上下文管理	UE Context Setup UE Context Release Request (gNB-DU initiated) UE Context Release (gNB-CU initiated) UE Context Modification (gNB-CU initiated) UE Context Modification Required (gNB-DU initiated) UE Inactivity Notification Notify
RRC消息转发	Initial UL RRC Message Transfer DL RRC Message Transfer UL RRC Message Transfer RRC Delivery Report
告警消息	Write-Replace Warning PWS Cancel PWS Restart Indication PWS Failure Indication
系统消息	System Information Delivery
寻呼	Paging

本文地址：https://blog.csdn.net/u012800825/article/details/105914590