5G核心网会话管理

william_weidu

1、会话管理网元主要是SMF，与SMF交互的接口有，N4接口-UPF，N7接口-PCF，N10接口-UDM，N11接口AMF；其中N4接口创建、修改、释放PDS会话；N7接口获取用户策略控制等信息；N10接口获取用户订阅消息等；N11接口PDU会话上下文建立等；

2、PDU session establishment request 消息结构

PDU Session Establishment Request (24.501 - 8.3.1.1)




PDU seesion Type (24.501 - 9.11.4.11)

SSC mode (24.501 - 9.11.4.16)

5GSM capability (24.501 - 9.11.4.1)

Maximum number of supported packet filters (24.501 - 9.11.4.9)

Always-on PDU session requested  (24.501 - 9.11.4.4)

SM PDU DN request container  (24.501 - 9.11.4.15)

Extended protocol configuration options  (24.501 - 9.11.4.6)

3、PDU session establishment accpet消息结构：

PDU Session Establishment Accept (24.501 - 8.3.2.1)




PDU Session ID (24.501 - 9.4)

Selected PDU session type (24.501 - 9.11.4.11)

Selected SSC mode (24.501 - 9.11.4.16)

Authorized QoS rules (24.501 - 9.11.4.13)

Session AMBR (24.501 - 9.11.4.14)

5GSM cause (24.501 - 9.11.4.2)

PDU address (24.501 - 9.11.4.10)

RQ Timer Value  (24.501 - 9.11.2.3)

S-NSSAI  (24.501 - 9.11.2.8)

Always-on PDU session indication (24.501 - 9.11.4.3)

Mapped EPS bearer contexts (24.501 - 9.11.4.8)

EAP message (24.501 - 9.11.2.2)

Authorized QoS flow descriptions  (24.501 - 9.11.4.12)

Extended protocol configuration options  (24.501 - 9.11.4.6)

DNN  (24.501 - 9.11.2.1A)