Suspend Handling Call Flow
This section describes the Suspend Handling call flow.

Step |
Description |
---|---|
1 |
Initial Attach process is completed. The PDN1 (ebi 5) and PDN2 (ebi 6) is established. PDN3 (ebi 7) UE requested that PDN connection is in progress. The Create Bearer Request collision occurred. The MME sends Create Session Req for PDN3 to S11-GTP-EP. |
2 |
The S11-GTP-EP sends the Create Session Request for PDN3 to the cnSGW. |
3 |
The cnSGW sends the Sx Establishment Request to the PFCP-EP. |
4 |
The PFCP-EP sends the Sx Establishment Response to the cnSGW. |
5 |
The cnSGW sends the Create Session Request for PDN3 to the PGW. |
6 |
The S5-GTP-EP sends the Create Session Request for PDN3 to the PGW. |
7 |
The PGW sends the Create Session Rsppnse for PDN3 to the S5-GTP-EP. |
8 |
The S5-GTP-EP sends the Create Session Response for PDN3 to the cnSGW. |
9 |
The PGW sends the Create Bearer Request for PDN3 to the S5-GTP-EP. |
10 |
The S5-GTP-EP sends the Create Bearer Request for PDN3 to the cnSGW. |
11 |
Collision that is detected for Create Session Request transaction for PDN3 gets connected when waiting for the initial attach Modify Bearer Request or Response is complete. Collision Resolver suspends Create Bearer Request. The cnSGW sends Sx Modify Request and Create Session Request to the PFCP-EP. |
12 |
The PFCP-EP sends the Sx Modify Response and Create Session Response to cnSGW. |
13 |
The cnSGW sends the Create Session Response for PDN3 sent to the S11-GTP-EP. |
14 |
The S11-GTP-EP sends the Create Session Response for PDN3 sent to the MME. |
15 |
The MME sends the Modify Bearer Request for PDN3 to the S11-GTP-EP. |
16 |
The S11-GTP-EP sends the Modify Bearer Request for PDN3 to the cnSGW. |
17 |
The cnSGW sends the Modify Bearer Request for PDN3 to the PFCP-EP. |
18 |
The PFCP-EP sends the Sx Modify Response to the cnSGW. |
19 |
The cnSGW sends the Modify Bearer Response for PDN3 to the S11-GTP-EP. |
20 |
The S11-GTP-EP sends the Modify Bearer Response for PDN3 to the MME. |
21 |
The cnSGW sends Sx Modify Request 1 for PDN3 to the PFCP-EP. |
22 |
The PFPC-EP sends the Sx Modify Response 1 for PDN3 to the PFPC-EP. |
23 |
The cnSGW sends the Create Bearer Request for PDN3 sent to the S11-GTP-EP. |
24 |
The S11-GTP-EP sends the Create Bearer Request for PDN3 sent to the MME. |
25 |
The MME sends the Create Bearer Response for PDN3 to the S11-GTP-EP. |
26 |
The S11-GTP-EP sends the Create Bearer Response for PDN3 to the cnSGW. |
27 |
The cnSGW sends Sx Modify Request 2 for PDN3 to the PFCP-EP. |
28 |
The PFCP-EP sends the Sx Modify Response 2 for PDN3 to the cnSGW. |
29 |
The cnSGW sends the Create Bearer Response for PDN3 to the PGW. |
30 |
The S5-GTP-EP sends the Create Bearer Response for PDN3 to the PGW. |