Multi-PDN S1 Handover SGW Relocation to Service-Pod (SGW) Call Fow

This section describes the Multi-PDN S1 Handover SGW Relocation to Service-Pod (SGW) call flow.

Multi-PDN S1 Handover SGW Relocation to Service-Pod (SGW) Call Flow
Multi-PDN S1 Handover SGW Relocation to Service-Pod (SGW) Call Flow Description

Step

Description

1

The MME sends a Create Session Request (PDN1) with (OI = 0, MME Control TEID, PGW Control TEID, and PGW Data TEID) to the S11-GTP-EP.

2

The MME sends the Create Session Request (PDN2) with (OI = 0, MME Control TEID, PGW Control TEID, and PGW Data TEID) to the S11-GTP-EP.

3

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

4

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

5

The Node-Mgr responds with the Allocate ID Response (PDN1) to the Service-Pod (SGW).

6

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

7

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

8

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

9

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

10

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

11

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

12

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

13

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

14

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

15

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

16

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

17

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

18

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

19

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

20

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

21

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

22

The MME sends a Modify Bearer Request (PDN1) to the S11-GTP-EP.

23

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

24

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

25

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

26

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

27

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

28

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

29

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

30

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

31

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

32

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

33

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

34

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

35

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

36

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

37

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

38

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

39

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

40

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

41

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

42

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

43

The PGW responds with the Modify Bearer Response (PDN2) to the S11-GTP-EP.

44

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

45

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

46

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

47

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

48

The MME triggers the Delete Session Request [SI=1] to Old SGW.

49

The Old SGW deletes the session and responds with the Delete Session Response.