Inter-PLMN Mobility Support

The Inter-Public Land Mobile Network (Inter-PLMN) mobility feature allows the PLMN to change from home-PLMN to visited-PLMN when a User Equipment (UE) moves from its home network to a visited network and vice-versa. This feature provides support for various types of Inter-PLMN mobility cases.

For information on the call flows related to inter-PLMN handover, see the How it Works section.

H-UPF Data Path specifications:

  • Secondary PDR optimization for Homer calls

  • Inter-PLMN and Intra-PLMN handover support with optimization

  • Supports GTPU services for Homer calls

  • KPI support for Secondary PDR info in PDR

  • Handover statistics

UPF supports the following scenarios for various Inter-PLMN mobility:

  • 5G homer to 5G roamer

  • 5G homer to 4G roamer

  • 4G homer to 5G roamer

  • 4G homer to 4G roamer

  • 5G roamer to 5G homer

  • 5G roamer to 4G homer

  • 4G roamer to 5G homer

  • 4G roamer to 4G homer

UPF supports the following scenarios for various Intra-PLMN mobility:

  • 5G homer to 4G homer

  • 4G homer to 5G homer

  • 5G roamer to 4G roamer

  • 4G roamer to 5G roamer

  • EUTRAN to WiFi and vice-versa handover