Feature Description

This feature supports following procedures:

  • S1 based SGW Relocation

  • X2 based SGW Relocation

  • TAU SGW Relocation

  • 5G to 4G SGW Relocation

This feature also supports ePCO Indication flag at the PDN level, if it receives this indication in CS Request during Initial attach or PDN connection or SGW relocation.

SGW triggers a Modify Bearer Request to PGW in the following scenario:

  • The source MME supports ePCO and the target MME does not support it.

  • The target MME supports ePCO and the source MME does not support it.

Note

When 4G SGW relocation Create Session Request message receives 5GS Interworking Indication (5GSIWKI), then set SGW relocation type as 5G.