Non-orthogonal multiple access hybrid automatic repeat request

A method to be implemented at a device of a wireless receiver, the device including a Radio Frequency (RF) interface, and processing circuitry coupled to the RF interface, the method including:

• determining a residual rate to identify a decoding estimate for a first packet sent from a wireless first transmitter;
• determining a grouping of transmitters including the first transmitter and a wireless second transmitter, the second transmitter scheduled to transmit a second packet to the receiver;
• performing power optimization by determining lowest necessary transmission powers to achieve target error rates, the lowest necessary transmission powers corresponding, respectively, to a transmission of the first packet from the first transmitter and to a transmission of the second packet from the second transmitter, wherein the transmission of the first packet and the transmission of the second packet are within a same time-frequency resource and together define a signal to be received at the receiver;
• and
• encoding for transmission to the first transmitter and to the second transmitter information regarding the signal to cause the first transmitter and the second transmitter to transmit the signal based on the residual rate, the grouping and the power optimization.