Method and device for ssb transmission/reception in wireless communication system

A transmission and reception method of a base station in a wireless communication system comprising:

• identifying a synchronization signal block (SSB) group to which each of a plurality of SSBs belongs, each SSB group being related to a different frequency domain;
• performing resource mapping of the plurality of SSBs including information about the SSB group to which the SSBs belong based on the frequency domain corresponding to the SSB group to which the SSBs belong;
• and
• transmitting the plurality of SSBs including the information about the SSB group to which the SSBs belong on the mapped resource.

A UE in a wireless communication system comprising:

• a transceiver;
• and
• a controller configured to:
• receive a synchronization signal block (SSB) from a base station based on blind detection,
• identify information about an SSB group to which the SSB belongs based on the received SSB, the SSB group being related to a first frequency domain,
• identify a second frequency domain corresponding to at least one other SSB group based on the information about the SSB group, and
• control to receive, from the base station, at least one SSB belonging to the at least one other SSB group based on the second frequency domain.

A base station in a wireless communication system comprising:

• a transceiver;
• and
• a controller configured to:
• identify a synchronization signal block (SSB) group to which a plurality of SSBs belong, the each SSB group being related to a different frequency domain,
• perform resource mapping of the plurality of SSBs including information about the SSB group to which the SSBs belong based on the frequency domain corresponding to the SSB group to which the SSBs belong, and
• control to transmit the plurality of SSBs including the information about the SSB group to which the SSBs belong on the mapped resource.