Multi PDN Call X2 Handover SGW Relocation to cnSGW-C Call Flow

This section describes the Multi PDN Call X2 Handover SGW Relocation to cnSGW-C call flow.

Multi PDN Call X2 Handover SGW Relocation to cnSGW-C Call Flow
Multi PDN call X2 Handover SGW Relocation to cnSGW-C Call Flow Description

Step

Description

1

The MME sends the Create Session Request for (PDN1) with (OI = 1, MME Control TEID, PGW Control TEID, eNodeB Data TEID, PGW Data TEID) to the S11-GTP-EP.

2

The MME sends the Create Session Request (PDN2) to the S11-GTP-EP.

3

The S11-GTP-EP forwards the Create Session Request (PDN1) to the Service-Pod (SGW).

4

The Service-Pod (SGW) requests for ID allocation (PDN1) to the Node-Mgr.

5

The Node-Mgr responds with the Allocate Id Response (PDN1).

6

The Service-Pod (SGW) performs the UPF selection.

7

The Service-Pod (SGW) sends the Sx Session Establishment Request (PDN1) to the PFCP-EP.

8

The PFCP-EP forwards the Sx Session Establishment Request (PDN1) to the User-Plane.

9

The S11-GTP-EP sends the Create Session Request (PDN2) to the Service-Pod (SGW).

10

The Service-Pod (SGW) sends the Sx Session Establishment Request (PDN2) to PFCP-EP.

11

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

12

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

13

The PFCP-EP sends the Sx Session Establishment Response (PDN1) to the Service-Pod (SGW).

14

The Service-Pod (SGW) sends the Modify Bearer Request (PDN1) with the updated S5 SGW Control TEID and S5 SGW Data TEID to S5-GTP-EP.

15

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

16

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

17

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

18

The Service-Pod (SGW) sends the Modify Bearer Request (PDN2) with the updated S5 SGW Control TEID and S5 SGW Data TEID to the S5-GTP-EP.

19

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

20

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

21

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

22

The Service-Pod (SGW) sends the Create Session Response (PDN1) to the S11-GTP-EP.

23

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

24

The S11-GTP-EP forwards the Create Session Response (PDN1) to the MME.

25

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

26

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

27

The Service-Pod (SGW) sends the Create Session Response (PDN2) to the S11-GTP-EP.

28

The Service-Pod (SGW) updates the PDN2 session to the CDL Endpoint.

29

The S11-GTP-EP forwards the Create Session Response (PDN2) to the MME.

30

The MME sends the Delete Session Request (PDN1) [SI=1] to the Old SGW.

31

The Old SGW responds with the Delete Session Response to the MME.