Modulation based hybrid automatic repeat request feedback retransmission design

A wireless device for wireless communications, comprising:

• one or more memories storing processor-executable code;
• and
• one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the wireless device to:
• receive an initial transmission associated with a data payload, the initial transmission comprising a set of bits modulated using a first bit ordering scheme, a first bit subset of the set of bits associated with lower transmission reliability than a second bit subset of the set of bits;
• and
• receive a second transmission associated with the data payload comprising a second set of bits and one or more parity bits, the second set of bits modulated using a second bit ordering scheme that differs from the first bit ordering scheme and results in a modulated bit set, wherein at least a portion of the one or more parity bits are not included in the initial transmission and inclusion of the one or more parity bits satisfies a coding rate threshold for the second transmission, the second bit ordering scheme associated with higher transmission reliability for the first bit subset and reverses a bit ordering that was used for the initial transmission of the first bit subset.

A method for wireless communication at wireless device, comprising:

• transmitting an initial transmission associated with a data payload, the initial transmission comprising a set of bits modulated using a first bit ordering scheme, a first bit subset of the set of bits associated with lower transmission reliability than a second bit subset of the set of bits;
• selecting, for inclusion with a second transmission, one or more parity bits from a data buffer associated with the data payload, wherein at least a portion of the one or more parity bits are not included in the initial transmission and the one or more parity bits are selected until a coding rate threshold is satisfied for the second transmission;
• modulating the first bit subset using a second bit ordering scheme that reverses a bit ordering that was used for the initial transmission of the first bit subset to generate a modulated bit set, the second bit ordering scheme associated with higher transmission reliability for the first bit subset;
• and
• transmitting a second transmission associated with the data payload comprising the modulated bit set and the one or more parity bits.