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2024年2月18日发(作者:javascript失去焦点事件)

1、 NAS消息类型:EPS mobility management message types和EPS session 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)

}

else 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

 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 - - - - - -

0 1 0 0 0 0 0 1

0 1 0 0 0 0 1 0

0 1 0 0 0 0 1 1

0 1 0 0 0 1 0 0

0 1 0 0 0 1 0 1

0 1 0 0 0 1 1 0

0 1 0 0 1 0 0 0

0 1 0 0 1 0 0 1

0 1 0 0 1 0 1 0

0 1 0 0 1 0 1 1

0 1 0 0 1 1 0 0

0 1 0 0 1 1 1 0

0 1 0 1 0 0 0 0

0 1 0 1 0 0 0 1

0 1 0 1 0 0 1 0

0 1 0 1 0 0 1 1

0 1 0 1 0 1 0 0

0 1 0 1 1 1 0 0

0 1 0 1 0 1 0 1

0 1 0 1 0 1 1 0

0 1 0 1 1 1 0 1

0 1 0 1 1 1 1 0

0 1 0 1 1 1 1 1

0 1 1 0 0 0 0 0

0 1 1 0 0 0 0 1

0 1 1 0 0 0 1 0

0 1 1 0 0 0 1 1

0 1 1 0 0 1 0 0

0 1 1 0 1 0 0 0

0 1 1 0 1 0 0 1

EPS mobility management messages

Attach request

Attach accept

Attach complete

Attach reject

Detach request

Detach accept

Tracking area update request

Tracking area update accept

Tracking area update complete

Tracking area update reject

Extended service request

Service reject

GUTI reallocation command

GUTI reallocation complete

Authentication request

Authentication response

Authentication reject

Authentication failure

Identity request

Identity response

Security mode command

Security mode complete

Security mode reject

EMM status

EMM information

Downlink NAS transport

Uplink NAS transport

CS Service notification

Downlink generic NAS transport

Uplink generic NAS transport

Table 9.8.2: Message types for EPS session management

Bits

8 7 6 5 4 3 2 1

1 1 - - - - - -

1 1 0 0 0 0 0 1

1 1 0 0 0 0 1 0

1 1 0 0 0 0 1 1

1 1 0 0 0 1 0 1

1 1 0 0 0 1 1 0

1 1 0 0 0 1 1 1

1 1 0 0 1 0 0 1

1 1 0 0 1 0 1 0

1 1 0 0 1 0 1 1

1 1 0 0 1 1 0 1

1 1 0 0 1 1 1 0

1 1 0 1 0 0 0 0

1 1 0 1 0 0 0 1

1 1 0 1 0 0 1 0

1 1 0 1 0 0 1 1

1 1 0 1 0 1 0 0

1 1 0 1 0 1 0 1

1 1 0 1 0 1 1 0

1 1 0 1 0 1 1 1

1 1 0 1 1 0 0 1

1 1 0 1 1 0 1 0

1 1 0 1 1 0 1 1

1 1 1 0 1 0 0 0

EPS session management messages

Activate default EPS bearer context request

Activate default EPS bearer context accept

Activate default EPS bearer context reject

Activate dedicated EPS bearer context request

Activate dedicated EPS bearer context accept

Activate dedicated EPS bearer context reject

Modify EPS bearer context request

Modify EPS bearer context accept

Modify EPS bearer context reject

Deactivate EPS bearer context request

Deactivate EPS bearer context accept

PDN connectivity request

PDN connectivity reject

PDN disconnect request

PDN disconnect reject

Bearer resource allocation request

Bearer resource allocation reject

Bearer resource modification request

Bearer resource modification reject

ESM information request

ESM information response

Notification

ESM status


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