US 11,863,372 B2
Apparatus and method for performing dual connectivity in wireless communication system
Seungbo Yoo, Suwon-si (KR); Weiwei Wang, Beijing (CN); and Beomsik Bae, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Sep. 27, 2019, as Appl. No. 16/585,909.
Claims priority of provisional application 62/737,469, filed on Sep. 27, 2018.
Prior Publication US 2020/0106663 A1, Apr. 2, 2020
Int. Cl. H04L 41/0668 (2022.01); H04W 72/04 (2023.01); H04L 5/00 (2006.01); H04L 67/10 (2022.01); H04W 28/02 (2009.01); H04W 88/02 (2009.01)
CPC H04L 41/0668 (2013.01) [H04L 67/10 (2013.01); H04W 28/0252 (2013.01); H04W 88/02 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method performed by a next generation node base station (gNB) central unit-control plane (CU-CP) for a secondary node (SN) in a wireless communication system, the method comprising:
receiving information on a radio link of at least one cell from an evolved node base station (eNB) corresponding to a master node (MN);
transmitting, to a gNB central unit-user plane (CU-UP) through a first interface providing means for signaling between the gNB CU-CP and the gNB CU-UP, a bearer context modification request message including cell group information for the at least one cell based on the information on the radio link, the cell group information including:
a cell group identifier (ID) for indicating a secondary cell group (SCG) between a master cell group (MCG) and the SCG, and
downlink transmission information being a second value indicating a resume of downlink transmission in the gNB CU-UP among a first value indicating a stop of downlink transmission and the second value; and
transmitting, to a gNB distributed unit (DU) through a second interface providing means for signaling between the gNB DU and the gNB CU-CP, a user equipment (UE) context modification request message including information indicating a stop or a resume of a downlink transmission in the gNB DU based on the information on the radio link,
wherein the gNB CU-CP is associated with a radio resource control (RRC) and a control part of a packet data convergence protocol (PDCP) protocol, and
wherein the gNB CU-UP is associated with a user plane part of the PDCP protocol.