Method and apparatus for supporting various services in wireless communication system
The disclosure relates to a 5 th generation (5G) or pre-5G communication system for supporting a data transmission rate higher than that of a 4 th generation (4G) system, such as long-term evolution (LTE). The disclosure provides a method for operating a terminal in a wireless communication system, the method including: performing communication with an access and mobility management function (AMF) in a first network; and transmitting a radio resource control (RRC) message including information on the AMF in a second network.
1. A method for operating a network node in a wireless communication system, the method comprising:
receiving, from a user equipment (UE) supporting a first radio access technology (RAT) and a second RAT, a UE-initiated deregistration request message;
determining whether a usage reporting for the second RAT is required for a protocol data unit (PDU) session established for the UE;
in case that the usage reporting for the second RAT is required for the PDU session, transmitting, to the UE, a deregistration accept message, and transmitting, 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;
waiting for completion of the signaling connection release of the RAN, to receive the usage reporting for the second RAT from the RAN; and
transmitting, to a session management function (SMF), a PDU session release request message to release the PDU session.
2. The method of claim 1 , further comprising:
during completion of the signaling connection release of the RAN, receiving, from the RAN, usage data reporting for the second RAT.
3. The method of claim 1 , wherein the UE-initiated deregistration request message includes at least one of 5th generation-globally unique temporary identifier (5G-GUTI), a deregistration type, or an access type to be deregistered.
4. The method of claim 1 , further comprising:
when the usage reporting for the second RAT is not required for the PDU session, transmitting, to a session management function (SMF), a PDU session release request message to release the PDU session; and
receiving, from the SMF, a PDU session release response message.
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.
6. The network node of claim 5 , wherein the at least one processor is further configured to:
during completion of the signaling connection release of the RAN, receive, from the RAN, usage data information for the second RAT.
7. The network node of claim 5 , wherein the UE-initiated deregistration request message includes at least one of 5th generation-globally unique temporary identifier (5G-GUTI), a deregistration type, or an access type to be deregistered.
8. The network node of claim 5 , wherein the at least one processor is further configured to:
when the usage reporting for the second RAT is not required for the PDU session, transmit, to a session management function (SMF), a PDU session release request message to release the PDU session.
9. The network node of claim 8 , wherein the at least one processor is further configured to:
receive, from the SMF, a PDU session release response message.