Method for roaming session management based on charging limit for edge computing services

A method, performed by a home-session management function (H-SMF) in a wireless communication system, for controlling a spending limit for a terminal in a roaming state, the method comprising:

• receiving a PDU session establishment request message comprising information about home routed-session breakout (HR-SBO) from a visited-session management function (V-SMF);
• transmitting, to a home-policy control function (H-PCF), a request for policy information for an HR-SBO session related to a home-routed packet data unit (PDU) session;
• receiving a home-routed session management policy comprising a session management policy for the HR-SBO session from the H-PCF;
• and
• transmitting a PDU session establishment response message comprising the session management policy for the SR-SBO session to the V-SMF.

A home-policy control function (H-PCF) operating for controlling a spending limit for a terminal in a roaming state in a wireless communication system, the H-PCF comprising:

• a transceiver;
• and
• a controller,
• wherein the controller is configured to:
• receive, from a home-session management function (H-SMF), a request for policy information for a home routed-session breakout (HR-SBO) session related to a home-routed packet data unit (PDU) session;
• obtain the policy information for the HR-SBO session through a unified data repository (UDR);
• transmit a request for information related to a spending limit for the HR-SBO session to a home-charging function (H-CHF);
• receive, from the H-CHF, policy counter status information for the home-routed PDU session and policy counter status information for the HR-SBO session;
• and
• transmit a home-routed session management policy to the H-SMF,
• wherein the home-routed session management policy comprises a session management policy for the HR-SBO session.

A home-session management function (H-SMF) operating for controlling a spending limit for a terminal in a roaming state in a wireless communication system, the H-SMF comprising:

• a transceiver;
• and
• a controller,
• wherein the controller is configured to:
• receive a PDU session establishment request message comprising information about home routed-session breakout (HR-SBO) from a visited-session management function (V-SMF);
• transmit, to a home-policy control function (H-PCF), a request for policy information for an HR-SBO session related to a home-routed packet data unit (PDU) session;
• receive a home-routed session management policy comprising a session management policy for the HR-SBO session from the H-PCF;
• and
• transmit a PDU session establishment response message comprising the session management policy for the SR-SBO session to the V-SMF.