Inter-MME Handover Active-Active Transition Call Flow
This section describes the Inter-MME Handover Active-Active Transition call flow.

Step |
Description |
---|---|
1 |
New-MME sends the Modify Bearer Request to the S11-GTP-EP pod, with updated eNodeB F-TEID and new MME control F-TEID. |
2 |
S11-GTP-EP pod forwards the Modify Bearer Request to the SGW-SVC. SGW-SVC performs the following:
|
3 |
SGW-SVC sends the the Sx Modification Request with downlink FAR OHC, uplink PDR OHR, and APPLY ACTION as FORWARD, to the PFCP-EP pod. |
4 |
PFCP-EP pod sends the Sx Modification Request to the UP. |
5 |
UP sends the Sx Modification Response to the PFCP-EP pod. |
6 |
PFCP-EP pod sends the Sx Modification Response to the SGW-SVC. |
7 |
SGW-Service pod sends the Modify Bearer response to the S11-GTP-EP pod. |
8 |
SGW-SVC sends the Updated Session to the CDL Endpoint. Transaction S-T1 is complete. |
9 |
S11-GTP-EP pod sends the Modify Bearer Response to the New-MME. |