US 11,818,800 B2
Method and apparatus for improving service reliability in wireless communication system
Sangsoo Jeong, Suwon-si (KR); and Sangjun Moon, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Jul. 8, 2022, as Appl. No. 17/811,392.
Application 17/811,392 is a continuation of application No. 16/946,163, filed on Jun. 8, 2020, granted, now 11,412,572.
Claims priority of application No. 10-2019-0068265 (KR), filed on Jun. 10, 2019.
Prior Publication US 2022/0346189 A1, Oct. 27, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 80/10 (2009.01); H04W 76/11 (2018.01); H04W 8/08 (2009.01); H04W 24/08 (2009.01); H04W 48/16 (2009.01)
CPC H04W 80/10 (2013.01) [H04W 8/08 (2013.01); H04W 24/08 (2013.01); H04W 48/16 (2013.01); H04W 76/11 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A method, performed by a first session management function (SMF), for providing a continuous service to a user equipment (UE), the method comprising:
identifying, by the first SMF, triggering of an SMF change operation;
performing a subscription procedure with an access and mobility management function (AMF) for an event in which a status of the UE becomes an idle or an inactive;
in case that the status of the UE becomes the idle or the inactive, receiving, from the AMF, a notification message to report the event;
transmitting, to the AMF, a message indicating a change in a status of a protocol data unit (PDU) session so as to request a procedure of an SMF change, wherein the message indicating the change in the status of the PDU session includes a context identification (ID);
receiving a context request message requesting a context from a second SMF that is a target SMF; and
transmitting a context request response message to the second SMF.