Patent ID: 11863323
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. The method of claim 14, wherein the determining whether the session management message can be forwarded to a SMF comprises:
determining whether the AMF has a PDU session routing context for the PDU session ID, wherein the request type IE indicates that the session management message is associated to an existing PDU session, and a Data Network Name (DNN) is not included in the UL transport message;
obtaining subscription context for the wireless device from a unified data management (UDM), wherein the subscription context comprises an SMF identifier (ID); and
after determining: (i) that the AMF does not have a PDU session routing context for the PDU session ID and (ii) that the SMF ID is not associated with a default DNN, determining that a SMF cannot be selected for the session management message.