Enforcement during Mobility

The following options are associated with this subfeature:

N2HO

When the N2HO option is selected, the AMF performs the following actions:

  • During N2HO, the AMF encodes and sends the Restricted RAT list and Restricted Core Network list in the UE context transfer request.

  • On receiving the UE context transfer request from the source AMF, the AMF decodes the Restricted RAT list and Restricted Core Network list.

  • The AMF saves the Restricted RAT list and Restricted Core Network list in the UE context am-data subscription.

  • The AMF checks whether the UE is 5GC restricted or not. If the UE is 5GC restricted, the AMF sends a failure note for the N2HO with and without change.

N26HO

When the N26HO option is selected, the AMF performs the following actions:

  • When the N26 connected mode handover is from the AMF to the MME, the AMF checks whether the UE is EPC restricted or not. If the UE is EPC restricted, the AMF sends a HANDOVER_REQUIRED_MSG failure to source gNB.

  • When the N26 connected mode handover is from the MME to the AMF, the AMF checks whether the UE is 5GC restricted or not. If the UE is 5GC restricted, the AMF rejects the UE.