CPC H04L 41/0668 (2013.01) [H04L 67/10 (2013.01); H04W 28/0252 (2013.01); H04W 88/02 (2013.01)] | 12 Claims |
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.
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