Method and device for selecting multiple users and allocating resources for non-orthogonal multiple access in wireless communication system

A base station (BS) for allocating resources in a wireless communication system using multiple antennas, the BS comprising:

• a transmitter;
• a receiver;
• and
• a processor controlling the transmitter and the receiver,
• wherein the processor is configured to:
• classify a plurality of user equipments (UEs) into first-type UEs and second-type UEs based on type information on whether the UE regularly transmits a signal;
• control the transmitter to transmit reference signals only to the first-type UEs;
• control the receiver to receive channel estimation information from the first-type UEs that receive the reference signals;
• generate first-type beams for the first-type UEs and second-type beams for the second-type UEs based on the received channel estimation information;
• and
• allocate first resources for the first type beams and second resources for the second type beams,
• wherein the first-type beams are generated before the second-type beams, and the first-type beams are allocated resources in preference to the second-type beams,
• wherein the second-type beams are generated based on the generated first-type beams without channel estimation related to the second-type UEs in a non-orthogonal manner,
• wherein close loop layers are mapped to only the first-type beams for the first-type UEs among the first-type beams and the second-type beams, and
• wherein the second-type beams are applied to a hopping pattern determined based on a timing at which the second-type UEs are associated with the BS.