Patent ID: 11937337
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A method performed by a Home Session Management Function, H-SMF, in a core network of a cellular communications system to enable Data over Non-Access Stratum, DoNAS, data delivery in a roaming scenario, the method comprising:
receiving from a Visited Session Management Function, V-SMF, a Packet Data Unit, PDU, session create request during PDU session establishment for DoNAS data delivery for a User Equipment, UE, wherein the PDU session create request comprises an indication that a control plane interface between the V-SMF and the H-SMF can be used for DoNAS data delivery;
deciding whether to use the control plane interface between the V-SMF and the H-SMF for the DoNAS data delivery, or to use a user plane interface between a Visited User Plane Function, V-UPF, and a Home User Plane Function, H-UPF, for the DoNAS data delivery for the UE;
wherein if it is decided that the control plane interface is to be used for DoNAS data delivery;
sending a response to the V-SMF, wherein the response provides an indication that the control plane interface between the V-SMF and the H-SMF is to be used for a data path for the DoNAS data delivery for the UE, and
wherein tunnel information for uplink traffic towards a Home User Plane Function, H-UPF, is not provided in the response.