Delete IDFT (System-level) Call Flow

This section describes the Delete IDFT (system-level) call flow.

Delete IDFT (System-level) Call Flow
Delete IDFT (System Level Flow) Call Flow Description

Step

Description

1

Call is connected with the Source eNodeB and indirect forwarding tunnels are created.

MME sends the S11 Delete IDFT Request with Bearer Context with a DL/UL enB FTEID, to the GTP-EP S11.

2

The GTP-EP S11 forwards the S11 Delete IDFT Request with Bearer Context with a DL/UL enB FTEID, to the SGW-SVC.

The SGW-SVC receives the S11 Delete IDFT Request and performs the following:

  • Creates a new transaction

  • Completes the GTP validations

3

The SGW-SVC sends the Sx Modification Request with Remove Traffic Endpoints, to the PFCP-EP.

4

The PFCP-EP sends the Sx Modification Request with Remove Traffic Endpoints, to the UP.

5

The UP sends the Sx Session Modification Response to the PFCP-EP.

6

The SGW-SVC receives the Sx Session Modification Response from the PFCP-EP and performs the following:

  • Ends the transaction/procedure

  • Updates the CDL

  • Sends the Delete IDFT Response with cause as Accepted