A transmitter device in a wireless communication system is provided. The transmitter device comprises a processor configured to: generate an extType field indicating a section extension; generate a mcScaleReMask field indicating a set of resource elements; generate a mcScaleOffset field indicating a power offset value; generate an extLen field indicating a number of a pair of the mcScaleReMask and the mcScaleOffset fields included in the section extension; and generate a downlink and uplink (DL/UL) control message including the extType field, the mcScaleReMask field, and the mcScaleOffset field, and the extLen field. The transmitter device further comprises a transceiver operably connected to the processor, the transceiver configured to transmit, to a receiver, the DL/UL control message.