Inter/Intra-MME Handover Idle-Idle Transition Call Flow
This section describes the Inter/Intra-MME Handover Idle-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 Modify Bearer request at S5 GTPC-EP POD from SGW-Service POD with ULI. Modify Bearer request is forwarded to PGW. |
5, 6 |
Received Modify Bearer response at S5 GTPC-EP POD from PGW. Modify Bearer response received at SGW-Service POD. |
7 |
SGW-Service POD forwards Modify Bearer response to S11 GTPC-EP POD ingress. |
8, 9 |
Session updated at CDL. Transaction S-T1 is complete. S11 GTPC-EP POD forwards Modify Bearer response to MME. |