Hybrid automatic repeat request management for low latency communications

An apparatus for wireless communication, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• allocate a first number of hybrid automatic repeat request (HARQ) identifications (IDs) to a first portion of a buffer, the first number of HARQ IDs being associated with HARQ operation for first transmission time intervals (TTIs);
• allocate a second number of HARQ IDs to a second portion of the buffer, the second number of HARQ IDs being associated with HARQ operation for second TTIs, the second TTIs being a different size than the first TTIs, wherein the first portion and the second portion do not change a total buffer size, and wherein at least one of the first number of HARQ IDs or the second number of HARQ IDs is a shared HARQ ID that is shared between the HARQ operation for the first TTIs and the HARQ operation for the second TTIs;
• receive a data transmission in a first TTI associated with the shared HARQ ID allocated to the first portion of the buffer;
• and
• receive a retransmission of the data transmission in a second TTI, the retransmission associated with the shared HARQ ID allocated to the second portion of the buffer.