Granted Patent B2

US 12,225,604 · App. 18/393,308 · Granted Feb 11, 2025

Inventors: Sangsoo Jeong (Suwon-si, KR); Hoyeon Lee (Suwon-si, KR)

Assignee: Samsung Electronics Co., Ltd.

H04W76/12H04W60/06

Abstract

Claims (29)

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 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 N2 signaling connection release;

waiting for completion of the N2 signaling connection release, 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 N2 signaling connection release, receiving, from the RAN, usage data reporting for the second RAT.

3. The method of claim 1 , wherein the deregistration request message includes at least one of a 5 th generation-globally unique temporary identifier (5G-GUTI), a deregistration type, or an access type.

4. The method of claim 1 , further comprising:

in case that 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. The method of claim 1 , further comprising:

identifying the protocol data unit (PDU) session established for the UE.

6. A network node in a wireless communication system, the network node comprising:

a transceiver; and

at least one processor coupled with the transceiver and configured to:

receive, from a user equipment (UE) supporting a first radio access technology (RAT) and a second RAT, a deregistration request message;

determine 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, 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 N2 signaling connection release;

wait for completion of the N2 signaling connection release, 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.

7. The network node of claim 6 , wherein the at least one processor is further configured to:

during completion of the N2 signaling connection release, receive, from the RAN, usage data information for the second RAT.

8. The network node of claim 6 , wherein the deregistration request message includes at least one of a 5 th generation-globally unique temporary identifier (5G-GUTI), a deregistration type, or an access type.

9. The network node of claim 6 , wherein the at least one processor is further configured to:

in case that 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 and receive, from the SMF, a PDU session release response message.

10. The network node of claim 6 , wherein the at least one processor is further configured to:

identify the protocol data unit (PDU) session established for the UE.

Assignments (1)

Priority Claims (2)

Continuity (3)

References Cited (24)