CBR Multi-PDN Call Flow

This section describes the CBR Multi-PDN call flow.

CBR Multi-PDN Call Flow
CBR Multi-PDN Call Flow Description

Step

Description

1

The Initial Attach process is completed with the three established PDNs.

The PGW sends a Create Bearer Request for PDN1 to the S5-GTP-EP.

2

The S5-GTP-EP sends the Create Bearer Request for PDN1 to the cnSGW.

3

The cnSGW sends a Sx Modify Request for PDN1 to the PFCP-EP.

4

The PGW sends a Create Bearer Request for PDN2 to the S5-GTP-EP.

5

The S5-GTP-EP sends the Create Bearer Request PDN2 to the cnSGW.

6

The cnSGW sends a Sx Modify Request to PFCP-EP for PDN2.

7

The PFCP-EP sends the Sx Modify Response for PDN1 to the cnSGW.

8

The cnSGW sends the Create Bearer Request for PDN1 to the S11-GTP-EP.

9

The S11-GTP-EP sends the Create Bearer Request for PDN1 to the MME.

10

The PGW sends the Create Bearer Request (PDN3) to the S5-GTP-EP.

11

The S5-GTP-EP sends the Create Bearer Request (PDN3) to the cnSGW.

12

The cnSGW sends the Sx Modify Request (PDN3) to the PFCP-EP.

13

The PFCP-EP sends the Sx Modify Response for PDN2 to the cnSGW.

14

The cnSGW sends the Create Bearer Request for PDN2 to the S11-GTP-EP.

15

The S11-GTP-EP sends the Create Bearer Request for PDN1 to the MME.

16

The MME sends the Create Bearer Response for PDN1 to the S11-GTP-EP.

17

The S11-GTP-EP sends the Create Bearer Response for PDN1 to the cnSGW.

18

The cnSGW sends the Sx Modify Request for PDN1 to the PFCP-EP.

19

The PFCP-EP sends the Sx Modify Response for PDN3 to the cnSGW.

20

The cnSGW sends the Create Bearer Request for PDN3 to the S11-GTPC-EP.

21

The S11-GTPC-EP sends the Create Bearer Request for PDN3 to the MME.

22

The PFCP-EP sends the Sx Modify Response2 for PDN1 to the cnSGW.

23

The cnSGW sends the Create Bearer Response for PDN1 to the S5-GTP-EP.

24

The S5-GTP-EP sends the Create Bearer Response for PDN1 to the PGW.

25

The MME sends the Create Bearer Response for PDN2 to the S11-GTPC-EP.

26

The S11-GTPC-EP sends the Create Bearer Response for PDN1 to the cnSGW.

27

The cnSGW sends the Sx Modify Request to the PFCP-EP for PDN2.

28

The PFCP-EP sends the Sx Modify Response for PDN2 to the cnSGW.

29

The cnSGW sends the Create Bearer Response for PDN2 to the S5-GTP-EP.

30

The S5-GTP-EP sends the Create Bearer Response for PDN2 to the PGW.

31

The MME sends the Create Bearer Response for PDN3 to the S11-GTPC-EP.

32

The S11-GTPC-EP sends the Create Bearer Response for PDN3 to the cnSGW.

33

The cnSGW sends the Sx Modify Request for PDN2 to the PFCP-EP.

34

The PFCP-EP sends the Sx Modify Response for PDN3 to the cnSGW.

35

The cnSGW sends the Create Bearer Response for PDN3 to the S5-GTP-EP.

36

The S5-GTP-EP sends the Create Bearer Response for PDN3 to the PGW.