US 11,903,052 B2
Method and apparatus for supporting various services in wireless communication system
Sangsoo Jeong, Suwon-si (KR); and Hoyeon Lee, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Feb. 14, 2022, as Appl. No. 17/651,024.
Application 17/651,024 is a continuation of application No. 16/900,736, filed on Jun. 12, 2020, granted, now 11,252,769.
Claims priority of application No. 10-2019-0071117 (KR), filed on Jun. 14, 2019; and application No. 10-2020-0044347 (KR), filed on Apr. 10, 2020.
Prior Publication US 2022/0167439 A1, May 26, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 64/00 (2009.01); H04W 76/12 (2018.01); H04W 60/06 (2009.01)
CPC H04W 76/12 (2018.02) [H04W 60/06 (2013.01)] 9 Claims
OG exemplary drawing
 
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.