GnGp to LTE Handover with OI Indicator Set Call Flow
This section describes the GnGp to LTE Handover with Operation Indication (OI) Indicator Set call flow.

Step |
Description |
---|---|
1 |
The MME sends the Create Session Request to the GTP-EP(S11) with the following information:
|
2 |
The GTP-EP(S11) forwards the Create Session Request to the SGW-SVC. |
3 |
The SGW-SVC sends the Sx Session Establishment Request to the Protocol-Sxa. |
4 |
The Protocol-Sxa sends the Sx Establishment Response to the SGW-SVC. |
5 |
The SGW-SVC sends the Modify Bearer Request to GTP-EP(S5). |
6 |
The GTP-EP(S5) forwards the Modify Bearer Request to the UDP-proxy. |
7 |
The UDP-proxy forwards the Modify Bearer Request to the PGW. |
8 |
The PGW sends the Modify Bearer Response with the default EBI information to the UDP-Proxy. |
9 |
The UDP-proxy forwards the Modify Bearer Response to the GTP-EP(S5). |
10 |
The GTP-EP(S5) forwards the Modify Bearer Response to the SGW-SVC. |
11 |
The SGW-SVC sends the Create Session Response with the default EBI information to the GTP-EP(S11). |
12 |
The GTP-EP(S11) forwards the Create Session Response to the MME. |