An apparatus and a method of wireless communication are provided. The method by a user equipment (UE) includes determining, based on a signaling from a base station, a combination of a listen before talk (LBT) type, a cyclic prefix (CP) extension, and a channel access priority class (CAPC) for an uplink transmission to the base station. This can solve issues in the prior art, provide an indication of LBT related information for a UE, provide a method for indicating an LBT type, a length of a CP extension, and a CAPC in an uplink grant, provide a good communication performance, and/or provide high reliability.