Inter MME Handover with Multi-PDN Handling (With PGW Interaction) Call Flow

This section describes the Inter MME Handover with Multi-PDN Handling (With PGW Interaction) call flow.

Inter MME Handover with Multi-PDN Handling (With PGW Interaction) Call Flow
Inter MME Handover with Multi-PDN Handling (With PGW Interaction) Call Flow Description

Step

Description

1

The New-MME sends the Modify Bearer Request for (PDN1) with the updated eNodeB FTEID, new MME control FTEID, and new serving network to the S11-GTP-EP.

2

The New-MME sends the Modify Bearer Request for (PDN2) with the updated eNodeB FTEID, new MME control FTEID, and new serving network to the S11-GTP-EP.

3

The S11-GTP-EP sends the Modify Bearer Request (PDN1) to the cnSGW-C.

4

The cnSGW-C sends the Sx Modify Request (PDN1) with the updated DL FAR OCR and UL PDR OHR to the PFCP-EP.

5

The PFCP-EP forwards the Sx Modify Request for (PDN1) to the User-Plane.

6

The S11-GTP-EP sends the Modify Bearer Request (PDN2).

7

The Service-Pod (SGW) sends Sx Modify Request (PDN2) with updated DL FAR OCR and UL PDR OHR to the PFCP-EP.

8

The PFCP-EP forwards the Sx Modify Request (PDN2) to User-Plane.

9

The User-Plane sends the Sx Modify Response (PDN1) to the PFCP-EP.

10

The PFPC-EP forwards the Sx Modify Response (PDN1) to the Service-Pod (SGW).

11

The Service-Pod (SGW) sends the Modify Bearer Request (PDN1) with updated serving network information to the S5-GTP-EP.

12

The S5-GTP-EP forwards the Modify Bearer Request (PDN1) to the PGW.

13

The User-Plane sends the Sx Modify Response (PDN2) to the PFCP-EP.

14

The PFCP-EP forwards the Sx Modify Response (PDN2) to the Service-Pod (SGW).

15

The Service-Pod (SGW) sends the Modify Bearer Request (PDN2) with the updated serving network information to S5-GTP-EP.

16

The S5-GTP-EP sends the Modify Bearer Request (PDN2) to the PGW.

17

The PGW sends the Modify Bearer Response (PDN1) to the S5-GTP-EP.

18

The S5-GPT-EP forwards the Modify Bearer Response (PDN1) to the Service-Pod (SGW).

19

The Service-Pod (SGW) forwards the Modify Bearer Response (PDN1) to the S11-GTP-EP.

20

The Service-Pod (SGW) updates the PDN1 session sent to the CDL Endpoint.

21

The S11-GTP-EP sends the Modify Bearer Response (PDN1) to the New-MME.

22

The PGW sends the Modify Bearer Response for (PDN2) to the S5-GTP-EP.

23

The S5-GPT-EP forwards the Modify Bearer Response (PDN2) to the Service-Pod (SGW).

24

The Service-Pod (SGW) forwards the Modify Bearer Response (PDN2) to the S11-GTP-EP.

25

The Service-Pod (SGW) marks Inter-MME as completed (PDN2) and updates PDN2 session sent to the CDL Endpoint.

26

The S11-GTP-EP sends the Modify Bearer Response (PDN2) to New-MME.