Sh Interface Call Flow
This section describes the call flow for the Sh interface.

|
Step |
Description |
|---|---|
|
1 |
The User Equipment (UE) sends a PDU Session Establishment request to the Access and Mobility Management (AMF) function. |
|
2 |
The AMF creates the Namf_PDUSession_CreateSMConext_Request service and sends it to SMF. |
|
3 |
The SMF creates and sends the Npcf_SMPolicyControl_CreateRequest[ContextData] service to H-PCF. |
|
4 |
The PCF sends a request to the User Data Repository (UDR) through the Sh interface. |
|
5 |
The Sh interface sends the UDA (Billing Plan) to the PCF. |
|
6 |
The PCF responds with the Npcf_SMPolicyControl_Create service to the SMF. |
|
7 |
The SMF sends the Npcf_SMPolicyControl_Update request to the PCF. |
|
8 |
The PCF responds with the Npcf_SMPolocyControl_Update response to the SMF. |
|
9 |
The UE sends the PDU Session Release request to SMF. |
|
10 |
The SMF forwards the Npcf_SMPolicyContro_Delete request to the PCF. |
|
11 |
The PCF sends the Npcf_SMPolicyControl_Delete response to SMF. |