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.

GnGp to LTE Handover with OI Indicator Set Call Flow
GnGp to LTE Handover with OI Indicator Set Call Flow Description

Step

Description

1

The MME sends the Create Session Request to the GTP-EP(S11) with the following information:

  • EBI List (No LBI Information)

  • PGW control and data TEID

  • OI Indicator flag set

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.