Existing Bearers Are Rejected Call Flow

This section describes the call flow where PCF evaluates the existing bearers if a trigger and rejects the bearers with the missing Media-Type AVP.

All Bearers Are Rejected Call Flow
All Bearers Are Rejected Call Flow Description

Step

Description

1

The SMF sends a N7 Create request to the PCF.

2

The PCF responds to the SMF with a N7 Create Success response.

3

The AF sends an AAR-I (Audio and Video) message to the PCF.

4

The PCF performs the Rx Authorization CRD lookup.

5

The Rx Authorization CRD evaluates both, the audio and video bearers.

If successful authorization, PCF sends AAA (Success) Result-Code=DIAMETER_SUCCESS(2001) to AF.

6

The PCF sends N7 Notify (Audio and Video) message.

7

The SMF responds with N7-Notify-Resp (Success) to the PCF.

8

The SMF sends N7 Update (RAT-Type Change).

9

The PCF performs the Rx Authorization CRD lookup.

10

When PCF reevaluates the existing bearer and the Rx Authorization CRD detects a VIDEO bearer with the missing AVP, PCF rejects the bearer with Error-Message=Throttled.

The PCF sends N7-UPDATE (Success) Charging Rule Remove for VIDEO to the SMF.

11

The PCF sends RAR (VIDEO) Specific-Action=INDICATION_OF_FAILED_RESOURCES_ALLOCATION to the AF.

12

The AF responds with RAA (Success) to the PCF.