US 11,871,462 B2
Inter-MeNB handover method and device in a small cell system
Lixiang Xu, Beijing (CN); Xiaowan Ke, Beijing (CN); and Hong Wang, Beijing (CN)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Feb. 24, 2023, as Appl. No. 18/174,257.
Application 18/174,257 is a continuation of application No. 17/497,486, filed on Oct. 8, 2021, granted, now 11,596,009, issued on Feb. 28, 2023.
Application 17/497,486 is a continuation of application No. 16/902,621, filed on Jun. 16, 2020, granted, now 11,147,111, issued on Oct. 12, 2021.
Application 16/902,621 is a continuation of application No. 16/790,065, filed on Feb. 13, 2020, granted, now 10,694,432, issued on Jun. 23, 2020.
Application 16/790,065 is a continuation of application No. 15/322,042, granted, now 10,595,243, issued on Mar. 17, 2020, previously published as PCT/KR2015/007197, filed on Jul. 10, 2015.
Claims priority of application No. 201410328143.5 (CN), filed on Jul. 10, 2014; and application No. 201510136863.6 (CN), filed on Mar. 26, 2015.
Prior Publication US 2023/0217514 A1, Jul. 6, 2023
Int. Cl. H04W 28/08 (2023.01); H04W 28/12 (2009.01); H04W 76/11 (2018.01); H04W 36/00 (2009.01); H04W 36/08 (2009.01); H04W 36/18 (2009.01); H04W 36/38 (2009.01); H04W 76/15 (2018.01)
CPC H04W 76/11 (2018.02) [H04W 36/0058 (2018.08); H04W 36/0061 (2013.01); H04W 36/0069 (2018.08); H04W 36/0094 (2013.01); H04W 36/08 (2013.01); H04W 36/18 (2013.01); H04W 36/38 (2013.01); H04W 76/15 (2018.02)] 13 Claims
OG exemplary drawing
 
1. A target master node (MN) for performing an inter-MN handover without a change of a secondary node (SN), the target MN comprising:
a transceiver; and
a controller coupled with the transceiver and configured to control to:
receive, from a source MN, a handover request message, wherein the handover request message comprises an identity (ID) of a user equipment (UE) allocated at the SN and an ID of the SN,
send, to the SN, a request message associated with the SN including the ID of the UE allocated at the SN and an ID of the UE allocated at the target MN,
receive, from the SN, a request acknowledge message for the request message,
send, to the source MN, a handover request acknowledge message including information indicating that a UE context in the SN is kept,
send, to the SN, a configuration completion message,
send, to a mobility management related entity, a path switch request message, and
receive, from the mobility management related entity, a path switch request acknowledge message,
wherein the ID of the UE allocated at the SN is application protocol ID of the UE over an interface between the source MN and the SN.