Method for transceiving system information in wireless communication system supporting carrier aggregation, and apparatus therefor

A UE receiving system information (SI) in a wireless communication system supporting carrier aggregation (CA), the UE comprising:

• one or more transceivers;
• one or more processors;
• and
• one or more memories operatively connectable to the one or more processors, and storing instructions of performing operations when the reception of the system information is executed by the one or more processors,
• wherein the operations include
• transmitting an RRC connection request message to a base station (BS);
• receiving an RRC connection setup message from the BS;
• transmitting an RRC connection setup complete message to the BS;
• receiving, from a primary cell (PCell) of the BS, an RRC reconfiguration message
• related to a configuration of a secondary cell (SCell);
• and
• receiving, from the SCell of the BS, a synchronization signal (SS) based on the RRC reconfiguration message, and
• wherein the RRC reconfiguration message includes at least one of a master information block (MIB) of the SCell or a time point when the synchronization signal is transmitted, and
• wherein an SS block related to the synchronization signal is transmitted based on beam information of the PCell and the time point when the synchronization signal is transmitted.

A method of transmitting, by a base station (BS), system information (SI) in a wireless communication system supporting carrier aggregation (CA), the method comprising:

• receiving an RRC connection request message from a user equipment (UE);
• transmitting an RRC connection setup message to the UE;
• receiving an RRC connection setup complete message from the UE;
• transmitting, to the UE, an RRC reconfiguration message related to a configuration of a secondary cell (SCell) through a primary cell (PCell);
• and
• transmitting, to the UE, a synchronization signal (SS) based on the RRC reconfiguration message through the SCell, and
• wherein the RRC reconfiguration message includes at least one of a master information block (MIB) of the SCell or a time point when the synchronization signal is transmitted, and
• wherein an SS block related to the synchronization signal is transmitted based on beam information of the PCell and the time point when the synchronization signal is transmitted.