US 11,991,568 B2
Method for supporting handover in mobile communication network
Lixiang Xu, Beijing (CN); Hong Wang, Beijing (CN); Xiaoning Ma, Beijing (CN); and Weiwei Wang, Beijing (CN)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Feb. 14, 2023, as Appl. No. 18/169,108.
Application 18/169,108 is a division of application No. 16/947,231, filed on Jul. 23, 2020, granted, now 11,611,917.
Claims priority of application No. 201910667347.4 (CN), filed on Jul. 23, 2019; application No. 201911296462.1 (CN), filed on Dec. 16, 2019; and application No. 202010318866.2 (CN), filed on Apr. 21, 2020.
Prior Publication US 2023/0199582 A1, Jun. 22, 2023
Int. Cl. H04W 36/00 (2009.01); H04W 36/08 (2009.01)
CPC H04W 36/0069 (2018.08) [H04W 36/0033 (2013.01); H04W 36/0066 (2013.01); H04W 36/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method performed by a mobility management entity (MME), the method comprising:
receiving, from an access and mobility management function (AMF) for a source next generation node B (gNB), a message associated with a handover required message for an inter-system handover from a 5G system (5GS) to an evolved packet system (EPS) with the source gNB associated with a target secondary gNB (SgNB), wherein the source gNB and the target SgNB correspond to a same network entity;
transmitting, to an evolved node B (eNB), a handover request message for the inter-system handover with the source gNB; and
receiving, from the eNB, an acknowledge of the handover request message,
wherein the handover required message includes a node identifier of the source gNB and a user equipment (UE) identifier allocated at the source gNB,
wherein the handover request message includes the node identifier of the source gNB and the UE identifier allocated at the source gNB, and
wherein the eNB is associated with the target SgNB in a dual connectivity based on the node identifier of the source gNB in the handover request message.