Hybrid automatic repeat request HARQ-based communication method and apparatus

Patent metadata

Field	Value
Publication number	US-12438639-B2
Application number	US-202318212345-A
Country	US
Kind code	B2
Filing date	Jun 21, 2023
Priority date	Dec 24, 2020
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

This application discloses a communication method includes: obtaining a plurality of information bits in first transmission; grouping the plurality of information bits into m groups of first information bit sequences K 1 , . . . , K m ; encoding the m groups of first information bit sequences to obtain a first target encoded codeword; sending the first target encoded codeword to a receive end; performing interleaving processing on n groups of first information bit sequences in the m groups of first information bit sequences in t th retransmission if the first transmission fails, to obtain m groups of first bit sequences X 1 , . . . , X m ; encoding the m groups of first bit sequences to obtain a second target encoded codeword; and sending the second target encoded codeword to the receive end. In this way, in a HARQ-based implementation, interleaving processing is performed on some information bit sequences in a retransmission process.

First claim

What is claimed is:

1. A hybrid automatic repeat request (HARQ)-based communication method, comprising:
obtaining a plurality of information bits in first transmission;
grouping the plurality of information bits into m groups of first information bit sequences K 1 , . . . , K m , wherein m is a positive integer;
performing first encoding on the m groups of first information bit sequences to obtain m groups of first encoded codewords;
performing second encoding on the m groups of first encoded codewords to obtain a first target encoded codeword;
sending the first target encoded codeword to a receive end;
performing interleaving processing on n groups of first information bit sequences in the m groups of first information bit sequences in t th retransmission if the first transmission fails, to obtain m groups of first bit sequences X 1 , . . . , X m , wherein n is less than m; t is greater than or equal to 1; and the m groups of first bit sequences comprise n groups of interleaved bit sequences, wherein the interleaving processing is performed in a retransmission process, and subsequent encoding and decoding operations are performed on interleaved sequences, wherein the decoding operations include a cancellation operation and an AND operation based on an interleaving pattern, a same interleaving pattern is implemented by using a same interleaver, different interleaving patterns are implemented by using different interleavers, wherein the interleaving processing improves code weight distribution in transmission;
performing the first encoding on the m groups of first bit sequences to obtain m groups of second encoded codewords;
performing the second encoding on the m groups of second encoded codewords to obtain a second target encoded codeword; and
sending the second target encoded codeword to the receive end.

2. The method according to claim 1 , wherein the n groups of first information bit sequences comprise: n groups of information bit sequences corresponding to layers whose reliability ranks low in the m groups of first information bit sequences, wherein the reliability ranks in descending order.

3. The method according to claim 1 , wherein an interleaving pattern of X m in the t th retransmission is different from an interleaving pattern of X m in (t+1) th retransmission.

4. The method according to claim 1 , further comprising:
performing interleaving processing on s groups of first information bit sequences in the m groups of first information bit sequences in the (t+1) th retransmission if the t th retransmission fails, to obtain m groups of second bit sequences, wherein s is less than m; and the m groups of second bit sequences comprise s groups of interleaved bit sequences;
performing the first encoding on the m groups of second bit sequences to obtain m groups of third encoded codewords;
performing the second encoding on the m groups of third encoded codewords to obtain a third target encoded codeword; and
sending the third target encoded codeword to the receive end.

5. The method according to claim 4 , wherein when interleaving is performed on the n groups of first information bit sequences at a same location in the t th retransmission and the (t+1) th retransmission, an interleaving pattern for performing interleaving processing on the first information bit sequence at the same location in the t th retransmission is different from an interleaving pattern for performing interleaving processing on the first information bit sequence at the same location in the (t+1) th retransmission.

6. The method according to claim 4 , wherein when interleaving is performed on the n groups of first information bit sequences at different locations in the t th retransmission and the (t+1) th retransmission, an interleaving pattern for performing interleaving processing on the first information bit sequence at one of the different locations in the t th retransmission is the same as or different from an interleaving pattern for performing interleaving processing on the first information bit sequence at the other of the different locations in the (t+1) th retransmission.

7. A hybrid automatic repeat request (HARQ)-based communication method, comprising:
receiving, by a receive end, first information in first transmission from a transmit end;
determining first soft information based on the first information;
receiving, by the receive end, second information in t th retransmission from the transmit end if the first transmission fails;
determining second soft information based on the second information; and
performing, by the receive end, decoding processing on the first soft information and the second soft information through a cancellation operation and an AND operation based on an interleaving pattern, wherein a same interleaving pattern is implemented by using a same interleaver, and wherein different interleaving patterns are implemented by using different interleavers, wherein
the first information is related to a first target encoded codeword of the transmit end; the second information is related to a second target encoded codeword of the transmit end; the first target encoded codeword is obtained by performing encoding processing on m groups of first information bit sequences; the second target encoded codeword is obtained by performing encoding processing on m groups of first bit sequences; the m groups of first bit sequences are obtained by performing interleaving processing on n groups of first information bit sequences in the m groups of first information bit sequences; and n is less than m, wherein the interleaving processing is performed in a retransmission process, and subsequent encoding and decoding operations are performed on interleaved sequences, wherein the interleaving processing improves code weight distribution in transmission.

8. The method according to claim 7 , wherein n groups of first information bit sequences comprise: n groups of information bit sequences corresponding to layers whose reliability ranks low in the m groups of first information bit sequences, wherein the reliability ranks in descending order.

9. The method according to claim 7 , wherein when interleaving is performed on the n groups of first information bit sequences at a same location in the t th retransmission and (t+1) th retransmission, an interleaving pattern for performing interleaving processing on the first information bit sequence at the same location in the t th retransmission is different from an interleaving pattern for performing interleaving processing on the first information bit sequence at the same location in the (t+1) th retransmission.

10. The method according to claim 7 , wherein when interleaving is performed on the n groups of first information bit sequences at different locations in the t th retransmission and (t+1) th retransmission, an interleaving pattern for performing interleaving processing on the first information bit sequence at one of the different locations in the t th retransmission is the same as or different from an interleaving pattern for performing interleaving processing on the first information bit sequence at the other of the different locations in the (t+1) th retransmission.

11. A hybrid automatic repeat request (HARQ)-based communication apparatus, comprising:
a transceiver, configured to
receive first information in first transmission from a transmit end, and
receive second information in t th retransmission from the transmit end if the first transmission fails; and

a processor, configured to
determine first soft information based on the first information,
determine second soft information based on the second information, and
per

Assignees

• Huawei Tech Co Ltd

Inventors

• Li Bin
• Gu Jiaqi
• Zhang Huazi
• Tong Wen

Classifications

• H04L1/1822

  involving configuration of automatic repeat request [ARQ] with parallel processes · CPC title

• H04L1/1812 Primary

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title

• H04L1/0071 Primary

  Use of interleaving (interleaving per se H03M13/27) · CPC title

• H04L1/0057

  Block codes (H04L1/0061, H04L1/0064 take precedence) · CPC title

• H04L1/1819

  with retransmission of additional or different redundancy · CPC title