US 12,082,065 B2
Session continuity for 3GPP and non-3GPP interworking
Chien-Chun Huang-Fu, Hsin-Chu (TW)
Assigned to MediaTek Inc., Hsinchu (TW)
Filed by MEDIATEK INC., Hsin-Chu (TW)
Filed on Apr. 12, 2022, as Appl. No. 17/719,093.
Claims priority of provisional application 63/187,960, filed on May 13, 2021.
Prior Publication US 2022/0369192 A1, Nov. 17, 2022
Int. Cl. H04W 36/14 (2009.01); H04W 36/00 (2009.01)
CPC H04W 36/14 (2013.01) [H04W 36/0033 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method, comprising:
maintaining an existing Packet data network (PDN) connection by a user equipment (UE) in evolved packet core (EPC), wherein the existing PDN connection is established over a first access type and is associated with a single network slice selection assistance information (S-NSSAI);
performing a first handover for the existing PDN connection over the first access type to a new PDN connection over a second access type in EPC;
associating the new PDN connection over the second access type with the S-NSSAI of the existing PDN connection; and
performing a second handover for the new PDN connection over the second access type in EPC to a protocol data unit (PDU) session in 5G evolved Packet Core (5GC).