MBC Failure Handling Call Flow
This section describes the MBC Failure Handling call flow.

Step |
Description |
---|---|
1 |
The MME sends the Modify Bearer Command to the S11 GTPC-EP pod. |
2 |
The GTPC-EP pod sends the ASYNC Modify Bearer Command to the SGW-SVC pod. |
3 |
The SGW-SVC pod forwards Modify Bearer Command to PGW. Save MBC_info in PDN for the response. |
4 |
The GTPC-EP pod performs retransmission. If there is no response, the pod sends Modify Bearer Command Failure Indication (MBCFI) to SGW-SVC pod. |
5 |
The UDP Proxy sends the Modify Bearer Command request to PGW. |
6 |
The MBCFI is received on the S5 GTPC-EP pod and is forwarded to SGW-SVC pod. |
7 |
The UDP Proxy sends the Modify Bearer Command failure details to the S5-GTP-EP. |
8 |
The S5-GTP-EP sends the GRPC Modify Bearer Command Response to the SGW-SVC. |
9 |
The SGW-SVC sends the GRPC Modify Bearer Command failure notification to the S11-GTP-EP. |
10 |
The SGW-SVC pod processes MBCFI and forwards the response to MME with saved MBC_Info. |