Asynchronous non-orthogonal multiple access in a time/frequency division orthogonal multiple access network

A system, comprising:

• a processor;
• and a memory, coupled to the processor, that stores executable instructions that, when executed by the processor, cause the processor to:
• allocate a continuous duration within a time division multiplexing access (TDMA) scheme, the continuous duration being for asynchronous non-orthogonal multiple access (NOMA) transmissions, and extending from an allocation start time to an allocation termination time, the continuous duration being formed of contiguous time slots of the TDMA scheme;
• and
• provide to a plurality of asynchronous NOMA user terminals an indication of the allocation start time and the allocation termination time, indicating allowance to the asynchronous NOMA user terminals to perform asynchronous NOMA transmissions within a start time constraint and a termination time constraint, the start time constraint being that respective starts of the asynchronous NOMA transmissions do not precede the allocation start time, and the termination time constraint being that respective terminations of the asynchronous NOMA transmissions do not succeed the allocation termination time.