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

Step |
Description |
---|---|
1 |
The SMF sends a SMPolicyControl_Ceate request to the PCF. |
2 |
The PCF responds to the SMPolicyControl_Create request. |
3 |
The AF sends an Authenticate-Authorize-Request (AAR) message to the PCF. The message contains Required-Access-Info AVP requesting the access network information required for the AF session. |
4 |
The PCF sends the AAA request to the AF. |
5 |
If the NetLoc feature is enabled, then the PCF sends an SMPolicyControl_UpdateNotify request toward the SMF. |
6 |
In response to the SMPolicyControl_UpdateNotify request, the SMF sends the access network information to the PCF. |
7 |
The PCF sends the SMPolicyControl_Update request to the SMF. |
8 |
The SMF sends the SMPolicyControl_Update request to the PCF. |
9 |
After the establishing the Rx-session and the Required-Access-Info lookup, the PCF sends the Rx Re-Authorization Request message to the AF. |
10 |
The AF sends the Rx Re-Authorization Request response containing the 3GPP-User-Location-Info AVP and access network information report to the PCF. |
11 |
If the session terminates, the SMF sends a SMPolicyControl_Delete request to the PCF. |
12 |
The PCF responds to SMF for the SMPolicyControl_Delete request. |
13 |
The PCF sends the Abort-Session-Request message to the AF. |
14 |
The AF responds with the Abort-Session-Answer to the PCF. |
15 |
The AF sends the Session-Termination-Request to the PCF. |
16 |
The PCF responds with the Session-Termination-Answer message to the AF. |