MBC Failure Handling Call Flow

This section describes the MBC Failure Handling call flow.

MBC Failure Handling Call Flow
MBC Failure Handling Call Flow Description

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.