Device and method for transmitting and receiving control information in wireless communication system

An apparatus for a base station in a wireless communication system, the apparatus comprising:

• a transceiver;
• and
• at least one processor operatively coupled with the transceiver,
• wherein the at least one processor is configured to:
• determine powers for each of a plurality of terminals with respect to a resource block group based on channel information received from the each of the plurality of terminals, the resource block group comprising a resource block allocated to be shared by the plurality of terminals,
• determine an order of signals corresponding to the plurality of terminals based on a size of a power that is allocated to the resource block allocated to the plurality of terminals,
• generate control information of the resource block group for indicating a power ratio allocated to the resource block group,
• dispose the control information into a control channel based on the determined order, and
• transmit the control information to the each of the plurality of terminals wherein the control information comprises information on the order of the signals.

An apparatus for a first terminal in a wireless communication system, the apparatus comprising:

• a transceiver;
• and
• at least one processor operatively coupled with the transceiver,
• wherein the at least one processor is configured control to:
• receive, from a base station, control information of a resource block group for indicating a power ratio allocated to the resource block group,
• identify, based on the control information, a first power ratio allocated to a first terminal associated with a resource block in the resource block group and a second power ratio allocated to a second terminal associated with the resource block, wherein, in order to identify the first power ratio, the at least one processor is configured to:
• identify a power ratio allocated to at least one resource block allocated to the first terminal, and
• identify the first power ratio allocated to the first terminal among the power ratio allocated to the at least one resource block,
• receive, from the base station, signals on the resource block, the signals including a first downlink signal for the first terminal and a second downlink signal for the second terminal, and
• detect, based on the first power ratio and the second power ratio, the first downlink signal among the signals.