# US 2022/0286233 A1 · Data transmission method and device, and storage medium

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- Number: US 2022/0286233 A1
- Document ID: US20220286233A1
- Status: Published application
- Kind: A1
- Application number: 17/631,425
- Filed: 2019-07-30
- Published: 2022-09-08
- Earliest claimed: 2019-07-30
- Assignees: Beijing Xiaomi Mobile Software Co., Ltd.; Beijing University of Posts and Telecommunications
- Applicants: Beijing Xiaomi Mobile Software Co., Ltd.; Beijing University of Posts and Telecommunications
- Inventors: Yajun ZHU; Wei HONG; Junli LI; Yong LI
- Web page: https://patentgrep.com/patent/US20220286233A1

## CPC

- H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L 1/1614: {using bitmaps}
- H04L 1/1671: {the supervisory signal being transmitted together with control information}
- H04L 1/1822: involving configuration of automatic repeat request [ARQ] with parallel processes
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A data transmission method includes: sending, by a network device, a fixed-length downlink control information (DCI), wherein the fixed-length DCI comprises a detection parameter corresponding to a variable-length DCI.

## Claims

### Claim 1

A data transmission method, comprising:
sending, by a network device, a fixed-length downlink control information (DCI), wherein the fixed-length DCI comprises a detection parameter corresponding to a variable-length DCI.

### Claim 2 (depends on 1)

The method according to claim 1, further comprising:
sending, by the network device in response to that the detection parameter indicates the variable-length DCI is to be sent, the variable-length DCI according to the detection parameter.

### Claim 3 (depends on 2)

The method according to claim 2, wherein,
the fixed-length DCI further comprises: a first hybrid automatic repeat request (HARQ) bitmap and a bitmap flag bit,
in response to that the bitmap flag bit is a first value, the first HARQ bitmap indicates feedback information of a transport block in at least one HARQ process, wherein each of the at least one HARQ process transmits one transport block; and
in response to that the bitmap flag bit is a second value, the first HARQ bitmap indicates feedback information of at least one code block group of at least one transport block.

### Claim 4 (depends on 3)

The method according to claim 3, further comprising:
in response to that the bitmap flag bit is the first value, the variable-length DCI indicates feedback information of at least one code block group in a transport block that is not successfully received.

### Claim 5 (depends on 4)

The method according to claim 4, wherein
the variable-length DCI is in form of a bitmap used for indicating the feedback information of the at least one code block group in the transport block that is not successfully.

### Claim 6 (depends on 3)

The method according to claim 3, further comprising:
in response to that the bitmap flag bit is the second value, the variable-length DCI comprises a second HARQ bitmap;
wherein the second HARQ bitmap indicates feedback information of a remaining code block group other than the at least one code block group whose feedback information is indicated by the first HARQ bitmap.

### Claim 7 (depends on 1)

The method according to claim 1, further comprising:
determining, by the network device, a length of the variable-length DCI according to a length of information contained in the variable-length DCI.

### Claim 8 (depends on 1)

The method according to claim 1, wherein the detection parameter corresponding to the variable-length DCI comprises at least one of:
a parameter indicating frequency domain resource occupied for sending the variable-length DCI;
a parameter indicating time domain resource occupied for sending the variable-length DCI; or
a parameter indicating length information of the variable-length DCI.

### Claim 9

A data transmission method, comprising:
receiving, by a terminal device, a fixed-length downlink control information (DCI), wherein the fixed-length DCI comprises a detection parameter corresponding to a variable-length DCI.

### Claim 10 (depends on 9)

The method according to claim 9, further comprising:
receiving, by the terminal device in response to that the detection parameter indicates the variable-length DCI is to be sent, the variable-length DCI according to the detection parameter.

### Claim 11 (depends on 10)

The method according to claim 10, wherein,
the fixed-length DCI further comprises: a first hybrid automatic repeat request (HARQ) bitmap and a bitmap flag bit,
in response to that the bitmap flag bit is a first value, retransmitting, by the terminal device according to the first HARQ bitmap, a transport block that is not successfully received in at least one HARQ process;
in response to that the bitmap flag bit is a second value, retransmitting, by the terminal device according to the first HARQ bitmap, at least one code block group of at least one transport block that is not successfully received.

### Claim 12 (depends on 10)

The method according to claim 10, further comprising:
in response to that the bitmap flag bit is the first value, retransmitting, by the terminal device according to feedback information indicated by the variable-length DCI and corresponding to at least one code block group in a transport block that is not successfully received, the code block group that is not successfully received.

### Claim 13 (depends on 12)

The method according to claim 12, wherein the retransmitting the code block group that is not successfully received comprises:
retransmitting, by the terminal device according to the feedback information indicated by the variable-length DCI in form of a bitmap and corresponding to the at least one code block group in the transport block that is not successfully received, the code block group that is not successfully received.

### Claim 14 (depends on 11)

The method according to claim 11, further comprising:
in response to that the bitmap flag bit is the second value, retransmitting, by the terminal device according to a second HARQ bitmap comprised in the variable-length DCI, a code block group that is not successfully received and indicated by the second HARQ bitmap.

### Claim 15 (depends on 9)

The method according to claim 9, further comprising at least one of:
determining, by the terminal device, frequency domain resource used for receiving the variable-length DCI according to the detection parameter corresponding to the variable-length DCI;
determining, by the terminal device, time domain resource used for receiving the variable-length DCI according to the detection parameter corresponding to the variable-length DCI;
determining, by the terminal device, length information of the variable-length DCI according to the detection parameter corresponding to the variable-length DCI.

### Claim at position 16

16-30. (canceled)

### Claim 31

A data transmission device, comprising a processor, a memory, and an executable program stored on the memory and executable by the processor, wherein the processor is configured to, when executing the executable program, perform steps of:
sending or receiving a fixed-length downlink control information (DCI), wherein the fixed-length DCI comprises a detection parameter corresponding to a variable-length DCI.

### Claim 32

(canceled)