Method and system for regional data network configuration in wireless communication network

A method performed by an access and mobility management function (AMF) entity in a communication system, the method comprising:

• transmitting, to a session management function (SMF) entity, a request message for establishment of a protocol data unit (PDU) session for a local area data network (LADN) with respect to a terminal;
• and
• receiving, from the SMF entity, a response message for the establishment of the PDU session for the LADN as a response to the request message,
• wherein, after the establishment of the PDU session for the LADN, in case that the AMF entity notifies the SMF entity that the terminal moves out of an LADN service area that is a set of tracking areas (TAs) for the LADN, a user plane connection for the PDU session for the LADN is deactivated while maintaining the PDU session for the LADN and downlink data for the PDU session is discarded.

A session management function (SMF) entity in a communication system, the SMF entity comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• receive, from an access and mobility management function (AMF) entity, a request message for establishment of a protocol data unit (PDU) session for a local area data network (LADN) with respect to a terminal,
• transmit, to the AMF entity, a response message for the establishment of the PDU session for the LADN as a response to the request message, and
• after the establishment of the PDU session for the LADN, in case that the SMF entity is notified from the AMF entity that the terminal moves out of an LADN service area that is a set of tracking areas (TAs) for the LADN, deactivate a user plane connection for the PDU session for the LADN while maintaining the PDU session for the LADN, wherein downlink data for the PDU session is discarded.

An access and mobility management function (AMF) entity in a communication system, the AMF entity comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to:
• transmit, to a session management function (SMF) entity, a request message for establishment of a protocol data unit (PDU) session for a local area data network (LADN) with respect to a terminal, and
• receive, from the SMF entity, a response message for the establishment of the PDU session for the LADN as a response to the request message,
• wherein, after the establishment of the PDU session for the LADN, in case that the AMF entity notifies the SMF entity that the terminal moves out of an LADN service area that is a set of tracking areas (TAs) for the LADN, a user plane connection for the PDU session for the LADN is deactivated while maintaining the PDU session for the LADN and downlink data for the PDU session is discarded.