US 12,238,812 B2
Support of service continuity for handover between SNPN and PLMN
Seokjung Kim, Seoul (KR); Myungjune Youn, Seoul (KR); Jian Xu, Seoul (KR); and Daewook Byun, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/905,271
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Mar. 4, 2021, PCT No. PCT/KR2021/002660
§ 371(c)(1), (2) Date Aug. 30, 2022,
PCT Pub. No. WO2021/177734, PCT Pub. Date Sep. 10, 2021.
Claims priority of application No. 10-2020-0028597 (KR), filed on Mar. 6, 2020; and application No. 10-2020-0031572 (KR), filed on Mar. 13, 2020.
Prior Publication US 2023/0112312 A1, Apr. 13, 2023
Int. Cl. H04W 76/30 (2018.01); H04W 36/00 (2009.01); H04W 84/04 (2009.01)
CPC H04W 76/30 (2018.02) [H04W 36/0016 (2013.01); H04W 36/0022 (2013.01); H04W 84/042 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method performed by a session management function (SMF) of a first network adapted to operate in a wireless communication, the method comprising:
performing a first protocol data unit (PDU) session establishment procedure for a wireless device via a next generation radio access network (NG-RAN) of the first network;
performing a second PDU session establishment procedure for the wireless device via a non-3GPP interworking function (N3IWF) of the first network;
transmitting, to a user plane function (UPF) of the first network, a duplication request for the UPF of the first network to duplicate downlink (DL) data and send the duplicated DL data to both the NG-RAN of the first network and the N3IWF of the first network; and
transmitting, to the N3IWF of the first network via an access and mobility management function (AMF) of the first network, a data buffering request for the N3IWF of the first network to buffer the duplicated DL data.