# US 12,191,996 B2 · Harq for advanced channel codes

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,191,996 B2
- Document ID: US12191996B2
- Status: Granted
- Kind: B2
- Application number: 18/483,202
- Filed: 2023-10-09
- Published: 2024-02-08
- Granted: 2025-01-07
- Earliest claimed: 2016-08-10
- Assignees: InterDigital Patent Holdings, Inc.
- Applicants: Interdigital Patent Holdings, Inc.
- Inventors: Chunxuan Ye; Nirav B. Shah; Fengjun Xi; Kyle Jung-Lin Pan
- Web page: https://patentgrep.com/patent/US12191996B2

## CPC

- H04L 1/0057: {Block codes (H04L1/0061, H04L1/0064 take precedence)}
- H03M 13/1102: {Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes}
- H03M 13/116: {Quasi-cyclic LDPC [QC-LDPC] codes, i.e. the parity-check matrix being composed of permutation or circulant sub-matrices}
- H03M 13/6306: {Error control coding in combination with Automatic Repeat reQuest [ARQ] and diversity transmission, e.g. coding schemes for the multiple transmission of the same information or the transmission of incremental redundancy (H03M13/3761, H03M13/3769 and H03M13/635 take precedence)}
- H03M 13/6393: {Rate compatible low-density parity check [LDPC] codes}
- H04L 1/0041: {Arrangements at the transmitter end}
- H04L 1/005: {Iterative decoding, including iteration between signal detection and decoding operation}
- H04L 1/0069: {Puncturing patterns}
- H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L 1/1819: {with retransmission of additional or different redundancy}
- H04L 1/1867: Arrangements specially adapted for the transmitter end
- H03M 13/13: Linear codes
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H03M: CODING; DECODING; CODE CONVERSION IN GENERAL (using fluidic means F15C4/00; optical analogue/digital converters G02F7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C)

## Abstract

A method may comprise receiving a first signal comprising first LDPC bits including systematic bits and parity bits and transmitting information indicating that the first signal was incorrectly received. A second signal comprising second LDPC bits may be received in response to the transmitting. The second signal may include LDPC bits according to a lifting size of an LDPC base graph.

## Claims

### Claim 1

A method comprising: transmitting a first signal comprising first low density parity check (LDPC) bits, wherein the first LDPC bits include systematic bits and parity bits;
receiving information indicating that the first signal was incorrectly received;
and transmitting a second signal comprising second LDPC bits, in response to the information indicating that the first signal was incorrectly received, wherein the second signal includes LDPC bits according to a lifting size of an LDPC base graph.

### Claim 2 (depends on 1)

The method of claim 1, wherein the second LDPC bits include other systematic bits and other parity bits.

### Claim 3 (depends on 2)

The method of claim 2, wherein the systematic bits and the parity bits are combined with the other systematic bits and the other parity bits.

### Claim 4 (depends on 1)

The method of claim 1, wherein the second LDPC bits include at least some of the first LDPC bits.

### Claim 5 (depends on 1)

The method of claim 1, wherein the first LDPC bits are encoded based on the LDPC base graph.

### Claim 6 (depends on 1)

The method of claim 1, wherein the first signal includes LDPC bits according to the lifting size of the LDPC base graph.

### Claim 7 (depends on 1)

The method of claim 1, wherein the method is performed by a user equipment (UE).

### Claim 8 (depends on 1)

The method of claim 1, wherein the method is performed by a base station.

### Claim 9

A wireless transmit/receive unit (WTRU) comprising:
a transmitter configured to transmit a first signal comprising first low density parity check (LDPC) bits, wherein the first LDPC bits include systematic bits and parity bits;
a receiver configured to receive information indicating that the first signal was incorrectly received; and
the transmitter configured to transmit a second signal comprising second LDPC bits, in response to the information indicating that the first signal was incorrectly received, wherein the second signal includes LDPC bits according to a lifting size of an LDPC base graph.

### Claim 10 (depends on 9)

The WTRU of claim 9, wherein the second LDPC bits include other systematic bits and other parity bits.

### Claim 11 (depends on 10)

The WTRU of claim 10, wherein the systematic bits and the parity bits are combined with the other systematic bits and other parity bits.

### Claim 12 (depends on 9)

The WTRU of claim 9, wherein the second LDPC bits include at least some of the first LDPC bits.

### Claim 13 (depends on 9)

The WTRU of claim 9, wherein the first LDPC bits are encoded based on the LDPC base graph.

### Claim 14 (depends on 9)

The WTRU of claim 9, wherein the first signal includes LDPC bits according to the lifting size of the LDPC base graph.

### Claim 15 (depends on 9)

The WTRU of claim 9, wherein the WTRU is a user equipment (UE).

### Claim 16 (depends on 9)

The WTRU of claim 9, wherein the WTRU is a base station.

### Claim 17

A wireless transmit/receive unit (WTRU) comprising:
a transmitter configured to transmit a first signal comprising first low density parity check (LDPC) bits, wherein the first LDPC bits include first systematic bits and first parity bits;
a receiver configured to receive information indicating that the first signal was incorrectly received; and
the transmitter configured to transmit a second signal comprising second LDPC bits, wherein the second LDPC bits include second systematic bits and second parity bits, in response to the information indicating that the first signal was incorrectly received, wherein the LDPC bits of the second signal are in accordance with a lifting size of an LDPC base graph; and wherein the first signal and the second signal are combinable.

### Claim 18 (depends on 17)

The WTRU of claim 17, further comprising: the receiver configured to receive information indicating successful data reception, based on a combination of the first signal and the second signal.

### Claim 19 (depends on 17)

The WTRU of claim 17, wherein the second LDPC bits include at least some of the first LDPC bits.

### Claim 20 (depends on 17)

The WTRU of claim 17, wherein the second LDPC bits include none of the first LDPC bits.

### Claim 21 (depends on 17)

The WTRU of claim 17, wherein the first signal and the second signal are combined via incremental redundancy.

### Claim 22 (depends on 17)

The WTRU of claim 17, wherein the WTRU is a user equipment (UE).

### Claim 23 (depends on 17)

The WTRU of claim 17, wherein the WTRU is a base station.