Method and device for session breakout of home routed session in visited PLMN in wireless communication system

A visited-session management function (V-SMF) entity configured to manage a protocol data unit (PDU) session in a wireless communication system, the V-SMF entity comprising:

• a transceiver;
• and
• at least one processor coupled to the transceiver and configured to:
• receive, from a visited-access and mobility management function (V-AMF) entity, a session management-related request message including a home routed session breakout (HR-SBO) allowed indication, wherein the HR-SBO allowed indication indicates that a session breakout (SBO) in a visited public land mobile network (VPLMN) for a home routed session is allowed;
• add a user plane function (UPF) for UL-CL (uplink classifier) based on the HR-SBO allowed indication, wherein the V-SMF supports the SBO in the VPLMN for the home routed session, wherein the V-SMF entity supports the SBO in the VPLMN for the home routed session;
• transmit, to a home-session management function (H-SMF) entity, a request for establishment of a session supporting HR-SBO based on the HR-SBO allowed indication, wherein the request includes an indicator related to the SBO in the VPLMN for the home routed session;
• and
• receive, from the H-SMF entity, a session create response message including information on whether the SBO is authorized or not.