Patent ID: 11864250
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: nan (nan)
Classification: CPC nan | IPC H

Claim 4:
5. A network node in a wireless communication system, the network node comprising:
a transceiver; and
at least one processor configured to:
receive, from a user equipment (UE) supporting a first radio access technology (RAT) and a second RAT, a UE-initiated deregistration request message;
determine whether a usage reporting for the second RAT is required for a protocol data unit (PDU) session established for the UES;
in case that the usage reporting for the second RAT is required for the PDU session, transmit, to the UE, a deregistration accept message, and transmit, to a radio access node (RAN) associated with the UE, a N2 UE context release request message for a signaling connection release of the RAN;
wait for completion of the signaling connection release of the RAN, to receive the usage reporting for the second RAT from the RAN; and
transmit, to a session management function (SMF), a PDU session release request message to release the PDU session.