US 11,924,751 B2
Method and apparatus for performing communication to use network slice in wireless communication system
Dongyeon Kim, Suwon-si (KR); Hoyeon Lee, Suwon-si (KR); Sangsoo Jeong, Suwon-si (KR); and Jungshin Park, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Oct. 6, 2022, as Appl. No. 17/938,615.
Application 17/938,615 is a continuation of application No. 17/453,641, filed on Nov. 4, 2021, granted, now 11,470,546.
Claims priority of application No. 10-2020-0148152 (KR), filed on Nov. 6, 2020; and application No. 10-2020-0154130 (KR), filed on Nov. 17, 2020.
Prior Publication US 2023/0044211 A1, Feb. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 48/18 (2009.01); H04W 8/18 (2009.01); H04W 76/10 (2018.01); H04W 76/30 (2018.01)
CPC H04W 48/18 (2013.01) [H04W 8/183 (2013.01); H04W 76/10 (2018.02); H04W 76/30 (2018.02)] 7 Claims
OG exemplary drawing
 
1. A method performed by an SMF+PGW-C that is a combination node of a session management function (SMF) in a 5G system (5GS) and a packet data network gateway-control (PGW-C) in an evolved packet system (EPS) in a wireless communication system supporting interworking between the 5GS and the EPS, the method comprising:
receiving, from a user data management (UDM) managing subscription information, subscription update information of a user equipment (UE) for which a packet data network (PDN) connection associated with a network slice is established in the EPS, the network slice being subscribed in the 5GS;
identifying whether to release the PDN connection in case that the subscription update information includes information notifying that network slice information associated with the PDN connection of the UE is changed; and
transmitting, to the UE, information indicating a cause associated with a release of the PDN connection associated with the network slice in case that the release of the PDN connection is identified,
wherein the network slice information includes subscribed single-network slice selection assistance information (S-NSSAI), and
wherein the information indicating the cause includes information representing a subscription removal of the subscribed S-NSSAI of the UE.