Inter-MME Handover Active-Active Transition Call Flow

This section describes the Inter-MME Handover Active-Active Transition call flow.

Inter-MME Handover Active-Active Transition Call Flow
Inter-MME Handover Active-Active Transition Call Flow Description

Step

Description

1

New-MME sends the Modify Bearer Request to the S11-GTP-EP pod, with updated eNodeB F-TEID and new MME control F-TEID.

2

S11-GTP-EP pod forwards the Modify Bearer Request to the SGW-SVC.

SGW-SVC performs the following:

  • Creates a new transaction S-T1

  • Validates the Modify Bearer Request

3

SGW-SVC sends the the Sx Modification Request with downlink FAR OHC, uplink PDR OHR, and APPLY ACTION as FORWARD, to the PFCP-EP pod.

4

PFCP-EP pod sends the Sx Modification Request to the UP.

5

UP sends the Sx Modification Response to the PFCP-EP pod.

6

PFCP-EP pod sends the Sx Modification Response to the SGW-SVC.

7

SGW-Service pod sends the Modify Bearer response to the S11-GTP-EP pod.

8

SGW-SVC sends the Updated Session to the CDL Endpoint.

Transaction S-T1 is complete.

9

S11-GTP-EP pod sends the Modify Bearer Response to the New-MME.