# US 10,320,532 B2 · Method whereby terminal transmits ACK/NACK in wireless communication system, and device therefor

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- Number: US 10,320,532 B2
- Document ID: US10320532B2
- Status: Granted
- Kind: B2
- Application number: 15/026,214
- Filed: 2014-10-06
- Published: 2016-08-04
- Granted: 2019-06-11
- Earliest claimed: 2013-10-04
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Dongyoun Seo; Joonkui Ahn; Daesung Hwang
- Web page: https://patentgrep.com/patent/US10320532B2

## CPC

- H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)}
- H04L 1/1854: {Scheduling and prioritising arrangements}
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04L 5/0032: {Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation}
- H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)}
- H04L 5/14: Two-way operation using the same type of signal, i.e. duplex
- H04L 5/143: {for modulated signals (H04L5/1469 takes precedence)}
- H04L 5/1469: {using time-sharing}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

Provided are a method whereby a terminal transmits an acknowledgement/not-acknowledgement (ACK/NACK) with a primary cell and a secondary cell aggregated, and a device for supporting the method. The method comprises: receiving data by a downlink subframe of a secondary cell; and transmitting an ACK/NACK for the data by an uplink subframe of a primary cell, wherein: the time interval between the downlink subframe and the uplink subframe is determined by a first hybrid automatic repeat request (HARQ) timing or a second HARQ timing; the first HARQ timing is an HARQ timing which is applied when the primary cell is used alone; and the second HARQ timing is an HARQ timing which is additional to the first HARQ timing.

## Claims

### Claim 1

A method for transmitting acknowledgement/negative acknowledgement (ACK/NACK) information, the method performed by a user equipment (UE) configured with a primary cell and a secondary cell and comprising:
receiving data in a plurality of downlink subframes of the cell;
generating ACK/NACK bits for the data; and
transmitting ACK/NACK information informing the ACK/NACK bits in an uplink subframe of the primary cell,
wherein the primary cell is a cell using a time division duplex (TDD) frame and the secondary cell is a cell using a frequency division duplex (FDD) frame,
wherein the primary cell is configured with one of uplink-downlink configurations in a following table 1,
TABLE 1
Uplink-
downlink
configu-
Subframe number
ration
0
1
2
3
4
5
6
7
8
9
0
D
S
U
U
U
D
S
U
U
U
1
D
S
U
U
D
D
S
U
U
D
2
D
S
U
D
D
D
S
U
D
D
3
D
S
U
U
U
D
D
D
D
D
4
D
S
U
U
D
D
D
D
D
D
5
D
S
U
D
D
D
D
D
D
D
6
D
S
U
U
U
D
S
U
U
D
wherein, in the table 1, D denotes a downlink subframe, S denotes a special subframe, and U denotes an uplink subframe, and
wherein, when physical uplink control channel (PUCCH) format 3 is configured for transmission of the ACK/NACK information, the ACK/NACK bits are arranged as a time order of the plurality of downlink subframes and a most significant bit (MSB) of the ACK/NACK bits informs ACK/NACK for data received in a first downlink subframe among the plurality of downlink subframes and the ACK/NACK information informing the ACK/NACK bits are transmitted through the PUCCH format 3.

### Claim 2 (depends on 1)

The method of claim 1, wherein the primary cell is a cell in which the UE performs an initial connection establishment procedure or a connection re-establishment procedure with a base station, and the secondary cell is a cell which is additionally allocated to the UE in addition to the primary cell.

### Claim 3 (depends on 1)

The method of claim 1, wherein each of the TDD frame and the FDD frame comprises 10 subframes.

### Claim 4 (depends on 1)

The method of claim 1, wherein, when the PUCCH format 3 is used for transmitting the ACK/NACK information, a symbol sequence regarding the ACK/NACK information is spread with an orthogonal sequence.

### Claim 5

A user equipment (UE) comprising:
a transceiver configured to transmit and receive a radio signal; and
a processor connected to the transceiver,
wherein the processor receives data in a plurality of downlink subframes of a secondary cell, generates ACK/NACK bits for the data and transmits ACK/NACK information informing the ACK/NACK bits in an uplink subframe of a primary cell,
wherein the primary cell is a cell using a time division duplex (TDD) frame and the secondary cell is a cell using a frequency division duplex (FDD) frame,
wherein the primary cell is configured with one of uplink-downlink configurations in a following table 1,
TABLE 1
Uplink-
downlink
configu-
Subframe number
ration
0
1
2
3
4
5
6
7
8
9
0
D
S
U
U
U
D
S
U
U
U
1
D
S
U
U
D
D
S
U
U
D
2
D
S
U
D
D
D
S
U
D
D
3
D
S
U
U
U
D
D
D
D
D
4
D
S
U
U
D
D
D
D
D
D
5
D
S
U
D
D
D
D
D
D
D
6
D
S
U
U
U
D
S
U
U
D
wherein, in the table 1, D denotes a downlink subframe, S denotes a special subframe, and U denotes an uplink subframe, and
wherein, when PUCCH format 3 is configured for transmission of the ACK/NACK information, the ACK/NACK bits are arranged as a time order of the plurality of downlink subframes and a most significant bit (MSB) of the ACK/NACK bits informs ACK/NACK for data received in a first downlink subframe among the plurality of downlink subframes and the ACK/NACK information informing the ACK/NACK bits are transmitted through the PUCCH format 3.

### Claim 6 (depends on 5)

The UE of claim 5, wherein the primary cell is a cell in which the UE performs an initial connection establishment procedure or a connection re-establishment procedure with a base station, and the secondary cell is a cell which is additionally allocated to the UE in addition to the primary cell.

### Claim 7 (depends on 5)

The UE of claim 5, wherein each of the TDD frame and the FDD frame comprises 10 subframes.

### Claim 8 (depends on 5)

The UE of claim 5, wherein, when the PUCCH format 3 is used for transmitting the ACK/NACK information, a symbol sequence regarding the ACK/NACK information is spread with an orthogonal sequence.