US 11,956,681 B2
Method and apparatus for supporting data synchronization for 4G/5G dual-registered mobile communication terminal
Jungshin Park, Seoul (KR); Sangjun Moon, Seoul (KR); Kisuk Kweon, Suwon-si (KR); Jicheol Lee, Suwon-si (KR); and Jinsung Lee, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Jan. 9, 2023, as Appl. No. 18/152,066.
Application 18/152,066 is a continuation of application No. 16/103,799, filed on Aug. 14, 2018, granted, now 11,553,379.
Claims priority of application No. 10-2017-0102950 (KR), filed on Aug. 14, 2017.
Prior Publication US 2023/0164638 A1, May 25, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 36/00 (2009.01); H04L 41/08 (2022.01); H04W 36/02 (2009.01); H04W 36/14 (2009.01); H04W 88/08 (2009.01)
CPC H04W 36/0005 (2013.01) [H04L 41/08 (2013.01); H04W 36/023 (2013.01); H04W 36/14 (2013.01); H04W 88/08 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method performed by a packet data network gateway-control plane+session management function (PGW-C+SMF) in a mobile communication system, the method comprising:
transmitting, to a packet data network gateway-user plane+user plane function (PGW-U+UPF), a request message including first information for allocating a tunnel for data forwarding to the PGW-U+UPF, in case that a terminal is handed over from a 5th generation system (5GS) to a second network system an evolved packet system (EPS);
as a response to the request message, receiving, from the PGW-U+UPF, a response message including second information on the tunnel for the data forwarding to the PGW-U+UPF; and
transmitting, to a first base station associated with the 5GS, the second information,
wherein the first information includes a quality of service (QoS) flow identifier for the data forwarding to the PGW-U+UPF,
wherein a QoS flow corresponding to the QoS flow identifier is mapped into a data forwarding tunnel associated with the EPS,
wherein the second information is used to forward at least one data packet from the first base station to a second base station associated with the EPS through the PGW-U+UPF, and
wherein the second information includes a tunnel endpoint identifier (TEID) for a protocol data unit (PDU) session for the data forwarding to the PGW-U+UPF.