Operation method of communication node supporting superposition transmission in cellular communication system

An operation method of a first terminal in a communication system including a base station, the first terminal, and a second terminal, the operation method comprising:

• receiving a transmission block to which a superimposed signal is mapped, the superimposed signal including information indicating a number of resource blocks included in each of a plurality of sub transmission blocks, information indicating transmit power allocation coefficients, first data units for the first terminal, and second data units for the second terminal, wherein the transmission block used for communications in the communication system is divided into the plurality of sub transmission blocks each of which includes at least one resource block, and the transmit power allocation coefficients are set respectively for the plurality of sub transmission blocks;
• identifying the transmit power allocation coefficients based on the information indicating transmit power allocation coefficients;
• and
• decoding the first data units from the superimposed signal by using a channel matrix between the first terminal and the base station and the transmit power allocation coefficients for the plurality of sub transmission blocks,
• wherein the first data units and the second data units are mapped to a same resource in the transmission block.

A first terminal in a communication system including a base station, the first terminal, and a second terminal, the first terminal comprising a processor;

• and a memory storing at least one instruction executed by the processor,
• wherein the at least one instruction is configured to:
• receive a transmission block to which a superimposed signal is mapped, the superimposed signal including information indicating a number of resource blocks included in each of a plurality of sub transmission blocks, information indicating transmit power allocation coefficients, first data units for the first terminal, and second data units for the second terminal, wherein the transmission block used for communications in the communication system is divided into the plurality of sub transmission blocks each of which includes at least one resource block, and the transmit power allocation coefficients are set respectively for the plurality of sub transmission blocks;
• identify the transmit power allocation coefficients based on the information indicating transmit power allocation coefficients;
• and
• decode the first data units from the superimposed signal by using a channel matrix between the first terminal and the base station and the transmit power allocation coefficients for the plurality of sub transmission blocks, the first data units and the second data units being mapped to a same resource in the transmission block.