UE Idle Mode Mobility from EPS to 5GS using N26 Interface

The SMF and PGW-C support EPS to 5GS Idle Mode Mobility procedure. For Idle Mode Mobility from EPS to 5GS, the UE performs Mobility Registration Update Procedure with AMF. The AMF and SMF retrieve MM and SM contexts from EPS and move UE context from EPS to 5GS by interacting with other core NFs.

This feature enables the EPS and 5GS core network elements to support the following use cases during EPS to 5GS Idle Mode Mobility procedure.

  • UE idle mode mobility from EPS to 5GS using N26 interface - PDU session in inactive state

  • UE idle mode mobility from EPS to 5GS using N26 interface - User Plane connection reactivation request