US 12,225,597 B2
Session and mobility management method using NAS protocols
Kyungjoo Suh, Suwon-si (KR); and Sangsoo Jeong, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Appl. No. 17/608,126
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
PCT Filed Apr. 29, 2020, PCT No. PCT/KR2020/005801
§ 371(c)(1), (2) Date Nov. 1, 2021,
PCT Pub. No. WO2020/222578, PCT Pub. Date Nov. 5, 2020.
Claims priority of application No. 10-2019-0051861 (KR), filed on May 2, 2019; and application No. 10-2019-0057732 (KR), filed on May 16, 2019.
Prior Publication US 2022/0225438 A1, Jul. 14, 2022
Int. Cl. H04W 36/00 (2009.01); H04W 72/04 (2023.01); H04W 76/10 (2018.01); H04W 76/20 (2018.01); H04W 80/10 (2009.01)
CPC H04W 76/10 (2018.02) [H04W 72/04 (2013.01); H04W 76/20 (2018.02); H04W 80/10 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method performed by a terminal in a communication system, the method comprising:
establishing a multi-access (MA) protocol data unit (PDU) session associated with a 3rd generation partnership project (3GPP) access and non-3GPP access;
determining to reactivate a user plane resource of the MA PDU session for one access among the 3GPP access and the non-3GPP access;
transmitting, to an access and mobility management function (AMF), a service request message over the one access, the service request message including uplink status information, and the uplink status information indicating the MA PDU session associated with the one access having pending uplink data; and
receiving, from the AMF, a service accept message including information on a reactivation result for the user plane resource of the MA PDU session,
wherein in case that the information on the reactivation result indicates a failure for reactivation of the user plane resource, the service accept message further includes information on an error cause of the failure, and
wherein the error cause indicates insufficient resources for a specific slice.