CBR Multi-PDN Call Flow
This section describes the CBR Multi-PDN call flow.

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. |