Method and apparatus for transmitting control information

1. A method for transmitting uplink control information at a communication apparatus in a time division duplex (TDD) wireless communication system, the method comprising:

receiving at least one physical downlink control channel (PDCCH) or at least one physical downlink shared channel (PDSCH); and

generating reception response information for the at least one PDCCH or the at least one PDSCH,

wherein, when the reception response information and channel status information are configured to be transmitted in a same subframe and a second physical uplink control channel (PUCCH) format is configured for the communication apparatus, if a certain condition is satisfied, the reception response information and the channel status information are transmitted together using a first PUCCH format, and

wherein the certain condition includes a first condition of a single PDCCH transmission only on a primary cell (PCell) that has a downlink assignment index (DAI) initial value equal to 1 and indicates a semi-persistent scheduling (SPS) release being present.

2. The method of claim 1 , wherein the certain condition includes the first condition or a second condition of a single PDSCH transmission only on the PCell where there is not a corresponding PDCCH being present.

3. The method of claim 2 , wherein the certain condition includes the first condition, the second condition, or a third condition of a single PDSCH transmission only on the PCell indicated by detection of a PDCCH having the DAI initial value being present.

4. The method of claim 3 , wherein, when the reception response information and the channel status information are configured to be transmitted in the same sublime, if the certain condition is not satisfied, the reception response information is transmitted using the second PUCCH format and the channel status information is dropped.

5. The method of claim 4 , wherein the second PUCCH format is a PUCCH format 3, and

wherein the PUCCH format 3 is a block-spreading based PUCCH format using Orthogonal Cover Code (OCC) based time-domain spreading.

6. The method of claim 3 , wherein, if the certain condition is not satisfied, a resource for the second PUCCH format is indicated by a value of a transmit power control (TPC) field of one or more secondary cell (SCell) PDCCHs and one or more PCell PDCCHs not corresponding to the DAI initial value.

7. The method of claim 1 , wherein the at least one PDCCH or the at least one PDSCH is received in at least one subframe n−k (kεK), the reception response information is transmitted in a subframe n, and K is given by the below table in accordance with an uplink-downlink (UL-DL) configuration:

UL-DL

Config-

Subframe n

uration

0

1

2

3

4

5

6

7

8

9

0

—

—

6

—

4

—

—

6

—

4

1

—

—

7, 6

4

—

—

—

7, 6

4

—

2

—

—

8, 7, 4, 6

—

—

—

—

8, 7,

—

—

4, 6

3

—

—

7, 6, 11

6, 5

5, 4

—

—

—

—

—

4

—

—

12, 8,

6, 5,

—

—

—

—

—

—

7, 11

4, 7

5

—

—

13, 12, 9,

—

—

—

—

—

—

—

8, 7, 5, 4,

11, 6

6

—

—

7

7

5

—

—

7

7

—.

8. The method of claim 1 , wherein the first PUCCH format is a PUCCH format 2, 2a or 2b,

wherein the PUCCH format 2 includes channel status information when not multiplexed with Hybrid Automatic Repeat and reQuest ACKnowledgment (HARQ-ACK) information or includes the channel status information with the HARQ-ACK information in a case of an extended Cyclic Prefix (CP),

wherein the PUCCH format 2a includes the channel status information with 1-bit HARQ-ACK information in a case of a normal CP, and

wherein the PUCCH format 2b includes the channel status information with 2-bit HARQ-ACK information in the case of the normal CP.

9. A communication apparatus configured to transmit uplink control information in a time division duplex (TDD) wireless communication system, the communication apparatus comprising:

a radio frequency (RF) unit; and

a processor configured to:

receive at least one physical downlink control channel (PDCCH) or at least one physical downlink Shared channel (PDSCH), and

generate reception response information for the at least one PDCCH or the at least one PDSCH,

wherein, when the reception response information and channel status information are configured to be transmitted in a same subframe and a second physical uplink control channel (PUCCH) format is configured for the communication apparatus, if a certain condition is satisfied, the reception response information and the channel status information are transmitted together using a first PUCCH format, and

wherein the certain condition includes a first condition of a single PDCCH transmission only on a primary cell (PCell) that has a downlink assignment index (DAI) initial value equal to 1 and indicates a Semi-Persistent Scheduling (SPS) release being present.

10. The communication apparatus of claim 9 , wherein the certain condition includes the first condition or a second condition of a single PDSCH transmission only on the PCell where there is not a corresponding PDCCH being present.

11. The communication apparatus of claim 10 , wherein the certain condition includes the first condition, the second condition, or a third condition of a single PDSCH transmission only on the PCell indicated by detection of a PDCCH having the DAI initial value being present.

12. The communication apparatus of claim 11 , wherein, when the reception response information and the channel status information are configured to be transmitted in the same subframe, if the certain condition is not satisfied, the reception response information is transmitted using the second PUCCH format and the channel status information is dropped.

13. The communication apparatus of claim 11 , wherein if the certain condition is not satisfied, a resource for the second PUCCH format is indicated by a value of a transmit power control (TPC) field of one or more secondary cell (SCell) PDCCHs or one or more PCell PDCCHs not corresponding to the DAI initial value.

14. The communication apparatus of claim 11 , wherein the second PUCCH format is a PUCCH format 3, and

wherein the PUCCH format 3 is a block-spreading based PUCCH format using Orthogonal Cover Code (OCC) based time-domain spreading.

15. The communication apparatus of claim 9 , wherein the at least one PDCCH or the at least one PDSCH is received in at least one subframe n−k (kεK), the reception response information is transmitted in a subframe n, and K is given by the below table in accordance with an uplink-downlink (UL-DL) configuration:

UL-DL

Config-

Subframe n

uration

0

1

2

3

4

5

6

7

8

9

0

—

—

6

—

4

—

—

6

—

4

1

—

—

7, 6

4

—

—

—

7, 6

4

—

2

—

—

8, 7, 4, 6

—

—

—

—

8, 7,

—

—

4, 6

3

—

—

7, 6, 11

6, 5

5, 4

—

—

—

—

—

4

—

—

12, 8,

6, 5,

—

—

—

—

—

—

7, 11

4, 7

5

—

—

13, 12, 9,

—

—

—

—

—

—

—

8, 7, 5, 4,

11, 6

6

—

—

7

7

5

—

—

7

7

—.

16. The communication apparatus of claim 9 , wherein the first PUCCH format is a PUCCH format 2, 2a or 2b,

wherein the PUCCH format 2 includes channel status information when not multiplexed with Hybrid Automatic Repeat and reQuest ACKnowledgment (HARQ-ACK) information or includes the channel status information with the HARQ-ACK information in a case of an extended Cyclic Prefix (CP),

wherein the PUCCH format 2a includes the channel status information with 1-bit HARQ-ACK information in a case of a normal CP, and

wherein the PUCCH format 2b includes the channel status information with 2-bit HARQ-ACK information in the case of the normal CP.