US 12,238,181 B2
Methods for handling CIoT data for invalid PDU session ID
Mahmoud Watfa, Staines (GB); and Lalith Kumar, Bangalore (IN)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Sep. 28, 2023, as Appl. No. 18/477,394.
Claims priority of application No. 202231055987 (IN), filed on Sep. 29, 2022; application No. 202231058522 (IN), filed on Oct. 13, 2022; and application No. 2314696 (GB), filed on Sep. 25, 2023.
Prior Publication US 2024/0114074 A1, Apr. 4, 2024
Int. Cl. H04L 67/146 (2022.01); H04L 67/142 (2022.01); H04W 8/20 (2009.01)
CPC H04L 67/146 (2013.01) [H04L 67/142 (2013.01); H04W 8/20 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
transmitting, to an access and mobility management function (AMF) entity, a control plane service request (CPSR) message including cellular Internet of Things (CIoT) user data for a first protocol data unit (PDU) session;
receiving, from the AMF entity, a service accept message indicating that the first PDU session is inactive in a network;
identifying whether a second PDU session has an identity value that is a same as an identity value of the first PDU session included in the CPSR message, wherein the second PDU session is one of at least one locally released PDU session based on the service accept message; and
determining, based on a determination that the second PDU session has the identity value that is the same as the identity value of the first PDU session, that the CIoT user data is not successfully sent to the AMF entity.