NAS协议解读1

更新时间:2023-07-28 01:58:22 阅读: 评论:0

1、 NAS消息类型:EPS mobility management message types和EPS ssion management message types——(24301-a10(230页))。
2、 根据协议指示判断是移动性管理消息和会话管理消息:
Protocol discriminator——(24007-900(100页))
if(pd==2)
{
会话管理消息解码(8.3节)
}
el if(pd==7)
{
移动性管理消息解码(8.2节)
}
3、 移动性管理消息解码:
协议指示(Protocol discriminator)+安全头(Security header type):1字节
消息类型(Message type):1字节
其他字段解码。。。。。。
4、 会话管理消息解码:
协议指示(Protocol discriminator)+承载ID(EPS bearer identity):1字节
过程事务ID(Procedure transaction identity):1字节给妈妈洗脚的作文
消息类型(Message type):1字节
其他字段解码。。。。。。
注1:TLV(标志,长度,值)
注2:O:可选部分;M:必选固定;C:条件可选。
Table 9.8.1: Message types for EPS mobility management
Bits
8
7
6
5
4
3
2
1
0
1
-
-
-
-
-
-
EPS mobility management messages
0
1
0
0
0
0
0
1
Attach request
0
1
0
足球小将小学篇0
0
0
1
0
Attach accept
0
判官钟馗
1
0
0
0
0
1
1
Attach complete
0
1
0
0
0
1
0
0
Attach reject
0
1
0
0
0
1
0
1
Detach request
0
1
0
0
0
1
1
0
步步高升是什么意思Detach accept
0
1
0
0
1
0
0
0
Tracking area update request
0
1海参做法
0
0
1
0
0
1
Tracking area update accept
0
1
0
0
1
0
1
0
Tracking area update complete
0
1
0
0
1
0
1
1
Tracking area update reject
0
1
0
0
1
1
0
0
Extended rvice request
0
1
0
0
1
1
1
0
Service reject
0
1
0
1
0
0
0
0
GUTI reallocation command
0
1
0
1
0
0
0
1
GUTI reallocation complete
0
1
0
1
0
0
1
0
Authentication request
0
1
0
1
0
0
1
1
Authentication respon
0
1
0
1
0
1
0
0
Authentication reject
0
1
0
1
1
1
0
0
Authentication failure
0
1
0
1
0
1
0
1
Identity request
0
1
0
1
0
1
1
0
Identity respon
0
1
0
1
1
1
0
1
Security mode command
0
1
0
1
1
1
1
0
Security mode complete
0
1
0
1
1
1
1
1
Security mode reject
0
1
1
0
0双十一文案
0
0
0
EMM status
0
1
1
0
0
0
0
1
EMM information
0
1
1
0
0
0
1
0
Downlink NAS transport
0
1
1
0
0
0
1
1
Uplink NAS transport
0
1
1
0
0
1杂酱面的杂酱的做法
0
0
CS Service notification
0
1
1
0
1
0
0
0
Downlink generic NAS transport
0
1
1
0
1
0
0
1
Uplink generic NAS transport
Table 9.8.2: Message types for EPS ssion management
Bits
8
7
6
5
4
3
2
1
1
1
-
-
-
-
-
-
EPS ssion management messages
1
1
0
0
0
0
0
1
Activate default EPS bearer context request
1
1
0
0
0
0
1
0
Activate default EPS bearer context accept
1
1
0
0
0
0
1
1
Activate default EPS bearer context reject
1
1
0
0
0
1
0
1
Activate dedicated EPS bearer context request
1
1
0
0
0
1
1
0
Activate dedicated EPS bearer context accept
1
1
0
0
0
1
1
1
Activate dedicated EPS bearer context reject
1
1
0
0
1
0
0
1
Modify EPS bearer context request
1
1
0偷组词
0
1
0
1
0
Modify EPS bearer context accept
1
1
0
0
1
0
1
1
Modify EPS bearer context reject
1
1
0
0
1
1
0
1
Deactivate EPS bearer context request
1
1
0
0
1
1
1
0
Deactivate EPS bearer context accept
1
1
0
1
0
0
0
0
PDN connectivity request
1
1
0
1
0
0
0
1
PDN connectivity reject
1
1
0
1
0
0
1
0
PDN disconnect request
1
1
0
1
0
0
1
1
PDN disconnect reject
1
1
0
1
0
1
0
0
Bearer resource allocation request
1
1
0
1
0
1
0
1
Bearer resource allocation reject
1
1
0
1
0
1
1
0
Bearer resource modification request
1
1
0
1
0
1
1
1
Bearer resource modification reject
1
1
0
1
1
0
0
1
ESM information request
1
1
0
1
1
0
1
0
ESM information respon
1
1
0
1
1
0
1
1
Notification
1
1
1
0
1
0
0
0
ESM status

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