# US 2014/0192688 A1 · Method for transmitting control information and apparatus for same

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- Number: US 2014/0192688 A1
- Document ID: US20140192688A1
- Status: Published application
- Kind: A1
- Application number: 14/235,757
- Filed: 2012-09-24
- Published: 2014-07-10
- Earliest claimed: 2011-09-23
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Suckchel Yang; Joonkui Ahn; Dongyoun Seo
- Web page: https://patentgrep.com/patent/US20140192688A1

## CPC

- H04L 27/2626: {Arrangements specific to the transmitter only}
- H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)}
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- 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
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for transmitting uplink control information in the wireless communication system, which supports carrier aggregation and operates by a TDD, and comprises the steps of: deciding HARQ-ACK bit numbers for each cell from a plurality of cells; composing a HARQ-ACK payload comprising HARQ-ACK bit(s) for each of the plurality of cells; and transmitting the HARQ-ACK payload from a subframe n through a PUSCH.

## Claims

### Claim 1

A method for transmitting uplink control information in a wireless communication system supporting carrier aggregation and operating in a time division duplex (TDD), the method comprising:
determining the number of per-cell hybrid automatic repeat request acknowledgement (HARQ-ACK) bits for each cell included in a plurality of cells;
configuring a HARQ-ACK payload including a plurality of per-cell HARQ-ACK bit(s); and
transmitting the HARQ-ACK payload in a subframe n through a physical uplink shared channel (PUSCH),
wherein, when the plurality of cells do not include a cell to which transmission timing according to a specific uplink-downlink (UL-DL) configuration is applied, the number of per-cell HARQ-ACK bits for each cell is determined using a value of min(W, Mc),
wherein, when the plurality of cells include one or more cells to which transmission timing according to the specific UL-DL configuration is applied, the number of per-cell HARQ-ACK bits for each cell is determined using a value of min(W+4┌(Umax−W)/4┐, Mc), and
wherein W denotes a value indicated by a 2-bit uplink downlink assignment index (UL DAI) field corresponding to the PUCCH, Mc denotes the number of downlink subframes corresponding to the uplink subframe n for each cell, Umax denotes a maximum value from among the numbers of downlink signals requiring HARQ-ACK responses per cell, and ┌ ┐ denotes a ceilng function.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the specific UL-DL configuration corresponds to UL-DL configuration #5.

### Claim 3 (depends on 2)

The method according to claim 2, wherein the UL-DL configuration #5 has the following radio subframe configuration
Subframe number
0
1
2
3
4
5
6
7
8
9
D
S
U
D
D
D
D
D
D
D
wherein 3D denotes a downlink subframe, U denotes an uplink subframe and S denotes a special subframe.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the plurality of per-cell HARQ-ACK bit(s) are concatenated in an ascending order of cell index in the HARQ-ACK payload.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the downlink signals requiring HARQ-ACK responses include a physical downlink shared channel (PDSCH) signal and a physical downlink control channel (PDCCH) signal indicating semi-persistent scheduling (SPS) release.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the method is performed by a communication device configured to transmit HARQ-ACK using physical uplink control channel (PUCCH) format 3.

### Claim 7

A communication device configured to transmit uplink control information in a wireless communication system supporting carrier aggregation and operating in a time division duplex (TDD), the communication device comprising:
a radio frequency (RF) unit; and
a processor,
wherein the processor is configured to determine the number of per-cell hybrid automatic repeat request-acknowledgement (HARQ-ACK) bits for each cell included in a plurality of cells, to configure a HARQ-ACK payload including a plurality of per-cell HARQ-ACK bit(s), and to transmit the HARQ-ACK payload in a subframe n through a physical uplink shared channel (PUSCH),
wherein, when the plurality of cells do not include a cell to which transmission timing according to a specific uplink-downlink (UL-DL) configuration is applied, the number of HARQ-ACK bits for each cell is determined using a value of min(W, Mc),
wherein, when the plurality of cells include one or more cells to which transmission timing according to the specific UL-DL configuration is applied, the number of per-cell HARQ-ACK bits for each cell is determined using a value of min(W+4┌(Umax−W)/4┐, Mc), and
wherein W denotes a value indicated by a 2-bit uplink downlink assignment index (UL DAI) field corresponding to the PUCCH, Mc denotes the number of downlink subframes corresponding to the uplink subframe n for each cell, Umax denotes a maximum value from among the numbers of downlink signals requiring HARQ-ACK responses per cell, and ┌┐ denotes a ceilng function.

### Claim 8 (depends on 7)

The communication device according to claim 7, wherein the specific UL-DL configuration corresponds to UL-DL configuration #5.

### Claim 9 (depends on 8)

The communication device according to claim 8, wherein the UL-DL configuration #5 has the following radio subframe configuration
Subframe number
0
1
2
3
4
5
6
7
8
9
D
S
U
D
D
D
D
D
D
D
wherein D denotes a downlink subframe, U denotes an uplink subframe and S denotes a special subframe.

### Claim 10 (depends on 7)

The communication device according to claim 7, wherein the plurality of per-cell HARQ-ACK bit(s) are concatenated in an ascending order of cell index in the HARQ-ACK payload.

### Claim 11 (depends on 7)

The communication device according to claim 7, wherein the downlink signals requiring HARQ-ACK responses include a physical downlink shared channel (PDSCH) signal and a physical downlink control channel (PDCCH) signal indicating semi-persistent scheduling (SPS) release.

### Claim 12 (depends on 7)

The communication device according to claim 7, wherein the communication device is configured to transmit HARQ-ACK using physical uplink control channel (PUCCH) format 3.