相关专题：
NAS基本流程
NAS基本流程如下表所示。
|
基本流程 |
初始消息 |
应答消息 |
|
|
成功 |
未成功 |
||
|
Authentication
procedure |
AUTHENTICATION
REQUEST |
AUTHENTICATION
RESPONSE |
AUTHENTICATION REJECT |
|
Attach
procedure for EPS services |
ATTACH
REQUEST |
ATTACH
ACCEPT |
ATTACH
REJECT |
|
Detach
procedure |
DETACH
REQUEST |
DETACH
ACCEPT |
|
|
Paging
procedure |
REQUEST
PAGING |
SERVICE
REQUEST（TMSI）
ATTACH（IMSI）
EXTENDED
SERVICE REQUEST（CS fallback to A/Gb or Iu
mode） |
|
NAS层功能和基本流程的映射关系
NAS层功能和基本流程的映射关系如下表所示。
|
EPS mobility management |
EPS session management |
|
Authentication procedure |
Principles of address handling for ESM procedures |
|
Security mode control procedure |
Default EPS bearer context activation procedure |
|
Identification procedure |
Dedicated EPS bearer context activation procedure |
|
EMM information procedure |
EPS bearer context modification procedure |
|
Attach procedure for EPS services |
EPS bearer context deactivation procedure |
|
Detach procedure |
UE requested PDN connectivity procedure |
|
Tracking area updating procedure |
UE requested PDN disconnect procedure |
|
Service request procedure |
UE requested bearer resource allocation procedure |
|
Paging procedure |
UE requested bearer resource modification procedure |
|
Transport of NAS messages procedure |
ESM information request procedure |
