	US 11,956,073 B2
	Techniques for a multiple incremental redundancy retransmission scheme
Tal Oved, Modiin (IL); Gideon Shlomo Kutz, Ramat Hasharon (IL); Assaf Touboul, Netanya (IL); Michael Levitsky, Rehovot (IL); and Alexander Vladimir Sverdlov, Rehovot (IL)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Apr. 29, 2021, as Appl. No. 17/302,294.
Prior Publication US 2022/0353010 A1, Nov. 3, 2022
Int. Cl. H04L 1/00 (2006.01); H04L 5/00 (2006.01); H04W 72/20 (2023.01)

CPC H04L 1/0004 (2013.01) [H04L 5/0055 (2013.01); H04W 72/20 (2023.01)]

29 Claims

1. A method of wireless communication performed by a transmitter device, comprising:

transmitting, to a receiver device, an initial message associated with a communication using a first code rate that is an overestimated code rate that is greater than a determined code rate associated with a channel,

wherein the first code rate is associated with a first spectral efficiency or a first modulation and coding scheme;

receiving, from the receiver device, first feedback information indicating that the communication was not successfully decoded by the receiver device;

transmitting, to the receiver device based at least in part on the reception of the first feedback information, one or more retransmissions associated with the communication including a first retransmission,

wherein the first retransmission includes a first number of bits, from a set of bits associated with the communication, the first number of bits being for a code block or a code block group associated with at least one code block or at least one code block group that was not successfully decoded by the receiver device,

wherein the first number of bits lowers an effective code rate of the communication to a second code rate that is associated with a second spectral efficiency or a second modulation and coding scheme, and

wherein the first number of bits lowers the effective code rate of the communication to a next lower modulation and coding scheme according to modulation and coding scheme indices defined by a wireless communication standard; and

receiving, from the receiver device, second feedback information indicating that the communication was successfully decoded by the receiver device,

wherein the effective code rate for the communication is based at least in part on a second number of bits included in the initial message and the first number of bits included in the first retransmission.

14. A transmitter device for wireless communication, comprising:

one or more memories; and

one or more processors, coupled to the one or more memories, configured to:

transmit, to a receiver device, an initial message associated with a communication using a first code rate that is an overestimated code rate that is greater t ha n a determined code rate associated with a channel,

wherein the first code rate is associated with a first spectral efficiency or a first modulation and coding scheme;

receive, from the receiver device, first feedback information indicating that the communication was not successfully decoded by the receiver device;

transmit, to the receiver device based at least in part on the reception of the first feedback information, one or more retransmissions associated with the communication including a first retransmission,

receive, from the receiver device, second feedback information indicating that the communication was successfully decoded by the receiver device,

27. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:

one or more instructions that, when executed by one or more processors of a transmitter device, cause the transmitter device to:

transmit, to a receiver device, an initial message associated with a communication using a first code rate that is an overestimated code rate that is greater than a determined code rate associated with a channel,

wherein the first code rate is associated with a first spectral efficiency or a first modulation and coding scheme;

receive, from the receiver device, first feedback information indicating that the communication was not successfully decoded by the receiver device;

receive, from the receiver device, second feedback information indicating that the communication was successfully decoded by the receiver device,

29. An apparatus for wireless communication, comprising:

means for transmitting, to a receiver device, an initial message associated with a communication using a first code rate that is an overestimated code rate that is greater than a determined code rate associated with a channel,

wherein the first code rate is associated with a first spectral efficiency or a first modulation and coding scheme;

means for receiving, from the receiver device, first feedback information indicating that the communication was not successfully decoded by the receiver device;

means for transmitting, to the receiver device based at least in part on the reception of the first feedback information, one or more retransmissions associated with the communication including a first retransmission,

means for receiving, from the receiver device, second feedback information indicating that the communication was successfully decoded by the receiver device,