Method and device for processing NAS message information in wireless communication system

A method, performed by an access and mobility management function (AMF), of processing a non-access stratum (NAS) message, the method comprising:

• transmitting a paging request message to a user equipment (UE);
• receiving, from the UE, a service request message while a session management message that is triggered by a session management function (SMF) is pending at the SMF, wherein the UE is in an idle state;
• transmitting, to the UE, a service accept message corresponding to the service request message;
• transmitting, to the UE, the session management message that is triggered by the SMF;
• and
• after transmitting the session management message, transmitting a UE configuration update command message to the UE, wherein a new 5th generation-global unique temporary identifier (5G-GUTI) is allocated after receiving the session management message.

A user equipment (UE) for processing a non-access stratum (NAS) message, the UE comprising:

• a transceiver;
• and
• a processor combined with the transceiver and configured to:
• receive a paging request message from an access and mobility management function (AMF),
• transmit, to the AMF, a service request message while a session management message that is triggered by a session management function (SMF) is pending at the SMF, wherein the UE is in an idle state,
• receive, from the AMF, a service accept message corresponding to the service request message,
• receive, from the AMF, the session management message that is triggered by the SMF, and
• after receiving the session management message, receive a UE configuration update command message from the AMF, wherein a new 5th generation-global unique temporary identifier (5G-GUTI) is allocated after receiving the session management message.

An access and mobility management function (AMF) for processing a non-access stratum (NAS) message, the AMF comprising:

• a transceiver;
• and
• a processor combined with the transceiver and configured to:
• transmit a paging request message to a user equipment (UE),
• receive, from the UE, a service request message while a session management message that is triggered by a session management function (SMF) is pending at the SMF, wherein the UE is in an idle state,
• transmit, to the UE, a service accept message corresponding to the service request message, and
• transmit, to the UE, the session management message that is triggered by the SMF, and
• after transmitting the session management message, transmit a UE configuration update command message to the UE, wherein a new 5th generation-global unique temporary identifier (5G-GUTI) is allocated after receiving the session management message.