CPC H04L 63/06 (2013.01) [H04L 41/0816 (2013.01); H04W 12/041 (2021.01); H04W 12/043 (2021.01); H04W 36/0055 (2013.01); H04W 36/0069 (2018.08); H04W 36/0079 (2018.08); H04W 76/15 (2018.02); H04W 76/22 (2018.02); H04W 88/06 (2013.01); H04W 88/08 (2013.01); H04W 88/10 (2013.01)] | 8 Claims |
1. A method performed by a master base station in a wireless communication system supporting dual connectivity, the method comprising:
transmitting, to a target secondary base station, an addition request message for secondary base station change, the addition request message including a current secondary cell group (SCG) configuration associated with a terminal;
receiving, from the target secondary base station, an acknowledge message as a response to the addition request message for the secondary base station change, wherein the acknowledge message includes a new SCG configuration associated with the terminal and information indicating that the terminal releases the current SCG configuration and applies the new SCG configuration;
transmitting, to the terminal, a radio resource control (RRC) reconfiguration message including the new SCG configuration associated with the terminal;
receiving, from the terminal, an RRC reconfiguration complete message as a response to the RRC reconfiguration message; and
transmitting, to the target secondary base station, a secondary base station reconfiguration complete message as a response to the RRC reconfiguration complete message.
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