5G学习笔记之NGAP
参考资料：3Gpp 38.413
1. NGAP服务
黄色玫瑰花语
NGAP提供NG-RAN节点与AMF节点之间的信令服务。服务分为两类：
⾮UE相关服务：在NG-RAN与AMF之间建⽴NG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. NGAP⼀般过程分类
（1）NGAP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
AMF Configuration Update AMF CONFIGURATION UPDATE AMF CONFIGURATION UPDATE
ACKNOWLEDGE
AMF CONFIGURATION
UPDATE FAILURE
RAN Configuration Update RAN CONFIGURATION UPDATE RAN CONFIGURATION UPDATE
ACKNOWLEDGE
RAN CONFIGURATION
UPDATE FAILURE
Handover Cancellation HANDOVER CANCEL HANDOVER CANCEL ACKNOWLEDGE
Handover Preparation HANDOVER REQUIRED HANDOVER COMMAND HANDOVER PREPARATION FAILURE
Handover Resource Allocation HANDOVER REQUEST
HANDOVER REQUEST
ACKNOWLEDGE
HANDOVER FAILURE
Initial Context Setup INITIAL CONTEXT SETUP
REQUEST
INITIAL CONTEXT SETUP
RESPONSE
INITIAL CONTEXT SETUP
FAILURE
UE Context Modification UE CONTEXT MODIFICATION
REQUEST
UE CONTEXT MODIFICATION
RESPONSE
UE CONTEXT MODIFICATION
FAILURE
UE Context Relea UE CONTEXT RELEASE
COMMAND
UE CONTEXT RELEASE COMPLETE
Path Switch Request PATH SWITCH REQUEST PATH SWITCH REQUEST
ACKNOWLEDGE
PATH SWITCH REQUEST
FAILURE
PDU Session Resource Setup PDU SESSION RESOURCE SETUP
REQUEST
PDU SESSION RESOURCE SETUP
RESPONSE
PDU Session Resource Relea PDU SESSION RESOURCE
RELEASE COMMAND
PDU SESSION RESOURCE
RELEASE RESPONSE
PDU Session Resource Modify PDU SESSION RESOURCE MODIFY
REQUEST
主导产业
PDU SESSION RESOURCE MODIFY
RESPONSE
PDU Session Resource Modify Indication PDU SESSION RESOURCE MODIFY
INDICATION
PDU SESSION RESOURCE MODIFY
CONFIRM
UE Radio Capability Check UE RADIO CAPABILITY CHECK
关于朋友的诗句REQUEST
UE RADIO CAPABILITY CHECK
RESPONSE
怎么开车起步
Write-Replace Warning WRITE-REPLACE WARNING
REQUEST
WRITE-REPLACE WARNING
RESPONSE
PWS Cancel PWS CANCEL REQUEST PWS CANCEL RESPONSE
⼀般过程发起消息成功响应失败响应
NG Ret NG RESET NG RESET ACKNOWLEDGE
NG Setup NG SETUP REQUEST NG SETUP RESPONSE NG SETUP FAILURE Class 2：通知类消息，⽆respon消息。
⼀般过程消息
Downlink RAN Configuration Transfer DOWNLINK RAN CONFIGURATION TRANSFER
Uplink RAN Configuration Transfer UPLINK RAN CONFIGURATION TRANSFER
Downlink RAN Status Transfer DOWNLINK RAN STATUS TRANSFER
Uplink RAN Status Transfer UPLINK RAN STATUS TRANSFER
Downlink NAS Transport DOWNLINK NAS TRANSPORT
Uplink NAS Transport UPLINK NAS TRANSPORT
Downlink UE Associated NRPPa Transport DOWNLINK UE ASSOCIATED NRPPA TRANSPORT
Uplink UE Associated NRPPa Transport UPLINK UE ASSOCIATED NRPPA TRANSPORT
Downlink Non UE Associated NRPPa Transport DOWNLINK NON UE ASSOCIATED NRPPA TRANSPORT
Uplink Non UE Associated NRPPa Transport UPLINK NON UE ASSOCIATED NRPPA TRANSPORT
Handover Notification HANDOVER NOTIFY
Initial UE Message INITIAL UE MESSAGE
NAS Non Delivery Indication NAS NON DELIVERY INDICATION
顽皮的小石头Error Indication ERROR INDICATION
Paging PAGING
PDU Session Resource Notify PDU SESSION RESOURCE NOTIFY
Reroute NAS Request REROUTE NAS REQUEST
UE Context Relea Request UE CONTEXT RELEASE REQUEST
AMF Status Indication AMF STATUS INDICATION
PWS Restart Indication PWS RESTART INDICATION
PWS Failure Indication PWS FAILURE INDICATION
Trace Start TRACE START
Trace Failure Indication TRACE FAILURE INDICATION
Deactivate Trace DEACTIVATE TRACE
Cell Traffic Trace CELL TRAFFIC TRACE
Location Reporting Control LOCATION REPORTING CONTROL
Location Reporting Failure Indication LOCATION REPORTING FAILURE INDICATION
Location Report LOCATION REPORT
UE TNLA Binding Relea UE TNLA BINDING RELEASE REQUEST
UE Radio Capability Info Indication UE RADIO CAPABILITY INFO INDICATION
RRC Inactive Transition Report RRC INACTIVE TRANSITION REPORT
Overload Start OVERLOAD START
Overload Stop OVERLOAD STOP
Secondary RAT Data Usage Report SECONDARY RAT DATA USAGE REPORT ⼀般过程消息
（2）NGAP⼀般过程按功能分类，⼤致可以分为以下14类：
功能过程
该出手时就出手
接⼝管理过程NG Setup
RAN Configuration Update AMF Configuration Update NG Ret
Error Indication
Overload Start
Overload Stop
露娜月下无限连AMF Status Indication
寻呼过程Paging
UE上下⽂管理过程Initial Context Setup
UE Context Relea Request (NG-RAN initiated) UE Context Relea Request (AMF initiated)
UE Context Modification
RRC Inactive Transition Report
UE移动性管理过程Handover Preparation Handover Resource Allocation Handover Notification
Path Switch Request
Handover Cancellation
Uplink RAN Status Transfer Downlink RAN Status Transfer
UE⽆线能⼒管理过程UE Radio Capability Info Indication UE Radio Capability Check
PDU会话管理过程PDU Session Resource Setup
PDU Session Resource Relea
PDU Session Resource Modify
PDU Session Resource Notify
PDU Session Resource Modify Indication
NAS消息传输过程Initial UE Message
Downlink NAS Transport Uplink NAS Transport
NAS Non Delivery Indication Reroute NAS Request
配置传输过程Uplink RAN Configuration Transfer Downlink RAN Configuration Transfer
告警消息传输过程Write-Replace Warning
NRPPa传输过程DOWNLINK UE ASSOCIATED NRPPA TRANSPORT DOWNLINK NON UE ASSOCIATED NRPPA TRANSPORT UPLINK UE ASSOCIATED NRPPA TRANSPORT
UPLINK NON UE ASSOCIATED NRPPA TRANSPORT
跟踪过程Trace Start
Trace Failure Indication Deactivate Trace Deactivate Trace
Cell Traffic Trace
简笔画入门位置报告过程Location Reporting Control
Location Reporting Failure Indication
位置报告过程Location Reporting Failure Indication 功能过程
Location Report
UE TNLA绑定过程UE TNLA Binding Relea
数据使⽤率报告过程Secondary RAT Data Usage Report
