Inter/Intra-MME Handover Active-Idle Transition Call Flow
This section describes the Inter/Intra-MME Handover Active-Idle transition call flow.

Step |
Description |
---|---|
1, 2 |
For inter-MME, received Modify Bearer request at SGW-Service POD via S11-GTPC-EP POD with MME control F-TEID and ULI. There is no eNodeB F-TEID. For intra-MME, received Modify Bearer request at SGW-Service POD with only ULI present:
|
3, 4 |
Received Sx Modification request at PFCP-EP POD from SGW-Service POD with downlink FAR as BUFFER. Sx Modification request is forwarded to UP. |
5, 6 |
Received Sx Modification response at at PFCP-EP POD from UP. Sx Modification response received at SGW-Service POD. |
7 |
SGW-Service POD forwards Modify Bearer response to GTPC-EP POD ingress. |
8, 9 |
Session updated at CDL. Transaction S-T1 is complete. GTPC-EP POD forwards Modify Bearer response to MME. |