Patent ID: 11924751
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A user equipment (UE) in a wireless communication system supporting interworking between a 5G system (5GS) and an evolved packet system (EPS), the UE comprising:
a transceiver; and
a processor configured to:
establish a packet data network (PDN) connection associated with a network slice in the EPS, the network slice being subscribed in the 5GS, and
identify a release of the PDN connection in case that the UE receives, from an SMF+PGW-C that is a combination node of a session management function (SMF) in the 5GS and a packet data network gateway-control (PGW-C) in the EPS, information indicating a cause associated with the release of the PDN connection, the SMF+PGW-C having received subscription update information including information notifying that network slice information associated with the PDN connection of the UE is changed,

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.