NPLI in Rx STA Call Flow
This section describes the NPLI in Rx STA call flow.

Step |
Description |
---|---|
1 |
The SMF sends a SMPolicyControl_Ceate request to the PCF. |
2 |
The PCF responds with the SMPolicyControl_Create response to the SMF. |
3 |
The AF sends an Authenticate-Authorize-Request message to the PCF. The message contains Required-Access-Info AVP requesting the access network information required for the AF session. |
4 |
The PCF responds with an AA-Answer message to the AF. |
5 |
If the NetLoc feature is enabled, the PCF sends the SMPolicyControl_UpdateNotify request to the SMF. |
6 |
The SMF responds with the SMPolicyControl_UpdateNotify message to the PCF. This message contains the access network information. |
7 |
The SMF sends the SMPolicyControl_Delete request to the PCF. |
8 |
The PCF responds to the SMF with the SMPolicyControl_Delete message. |
9 |
The PCF sends the Abort-Session-Request message to the AF. |
10 |
The AF responds with the Abort-Session-Answer to the PCF. |
11 |
The AF sends the Session-Termination-Request to the PCF. |
12 |
The PCF responds with the Session-Termination-Answer message to the AF. This message contains the user location information. |