Method and apparatus for transmitting and receiving reference signal in wireless communication system

A method performed by a base station (BS) in a wireless communication system, the method comprising:

• transmitting, to a user equipment (UE), a reference signal based on a transmission frequency band of the reference signal, wherein the reference signal is received by the UE in an IDLE state or an INACTIVE state;
• performing time synchronization and frequency synchronization with the UE based on the reference signal;
• and
• transmitting, to the UE, a paging message including an identifier of the UE based on the time synchronization and frequency synchronization,
• wherein the transmission frequency band of the reference signal is determined based on at least one of an initial frequency band for an initial access procedure, a control resource set (CORESET) configured for the UE using a master information block (MIB), or a CORESET associated with a paging search space set for monitoring a paging message.

A user equipment (UE) in a wireless communication system, the UE comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver and configured to:
• determine a transmission frequency band of a reference signal based on at least one of an initial frequency band for an initial access procedure, a control resource set (CORESET) configured for the UE using a master information block (MIB), or a CORESET associated with a paging search space set for monitoring a paging message, wherein the reference signal is received by the UE in an IDLE state or an INACTIVE state,
• receive, from a base station (BS), the reference signal based on the transmission frequency band of the reference signal,
• perform time synchronization and frequency synchronization with the BS based on the reference signal, and
• receive, from the BS, the paging message including an identifier of the UE based on the time synchronization and frequency synchronization.