US 12,376,064 B1
Method and UE for starting slice deregistration inactivity timer
Sang Geun Yu, Seoul (KR)
Assigned to Metapex Inc., Seoul (KR)
Filed by Metapex Inc., Seoul (KR)
Filed on Mar. 26, 2025, as Appl. No. 19/090,940.
Claims priority of application No. 10-2024-0074468 (KR), filed on Jun. 7, 2024; and application No. 10-2025-0033874 (KR), filed on Mar. 17, 2025.
Int. Cl. H04W 60/04 (2009.01); H04W 48/18 (2009.01); H04W 60/06 (2009.01); H04W 76/30 (2018.01)
CPC H04W 60/04 (2013.01) [H04W 48/18 (2013.01); H04W 60/06 (2013.01); H04W 76/30 (2018.02)] 13 Claims
OG exemplary drawing
 
1. An operation method of user equipment (UE), comprising:
receiving a REGISTRATION ACCEPT message or a CONFIGURATION UPDATE COMMAND message including on-demand Network Slice Selection Assistance Information (NSSAI) and a slice deregistration inactivity timer,
wherein the on-demand NSSAI includes one or more on-demand single NSSAIs (S-NSSAIs); and
starting the slice deregistration inactivity timer for a first on-demand S-NSSAI, if a protocol data unit (PDU) session associated with the first on-demand S-NSSAI is released, if there is no established user plane resources of a multi-access (MA) PDU session associated with the first on-demand S-NSSAI and if there is no PDU session associated with the first on-demand S-NSSAI,
wherein for a PDU session which is released locally, when the UE receives PDU session status information for which a PDU session that was previously in active state is now indicated as being in inactive state and when there is no established PDU session including any MA PDU session, the slice deregistration inactivity timer is also started.