Method for transmitting control information and device for same

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

determining, by the user equipment, a physical uplink control channel (PUCCH) transmission power parameter according to an uplink-downlink (UL-DL) configuration of a cell and a specific equation; and

transmitting, by the user equipment to a base station, a hybrid automatic repeat request-acknowledgement (HARQ-ACK) signal via a PUCCH in an uplink (UL) subframe in accordance with the determined PUCCH transmission power parameter,

wherein the specific equation includes applying a modulo-4 operation to a difference between a downlink assignment index (DAI) number and a number of physical downlink control channels (PDCCHs), the DAI number corresponding to a value of a DAI in a PDCCH lastly detected within at least one subframe associated with the UL subframe in the cell, and the number of PDCCHs corresponding to a total number of scheduling-related PDCCHs detected within the at least one subframe associated with the UL subframe in the cell.

2. The method of claim 1 , wherein:

the UL subframe corresponds to a subframe n,

the PUCCH transmission power parameter is n HARQ ,

the specific equation is:

n

HARQ

=

∑

c

=

0

C

-

1

⁢

(

(

(

V

DAI

,

c

DL

-

U

DAI

,

c

)

⁢

mod

⁢

⁢

4

)

·

n

c

ACK

+

∑

k

∈

K

⁢

N

k

,

c

received

)

,

wherein C denotes a number of cells configured for the user equipment,

K denotes a set having M elements k (kεK) according to the UL-DL configuration, M is a positive integer,

V DAI,c DL is the DAI number having a value indicated by a 2-bit DAI field included in the PDCCH lastly detected within the at least one subframe n−k in the cell c,

U DAI,c denotes the total number of scheduling-related PDCCHs detected within the at least one subframe n−k in the cell c,

n c ACK denotes a number of HARQ-ACK bits corresponding to the configured downlink transmission mode on the cell c, and is set to 1 when spatial bundling is applied,

when spatial bundling is applied, N k,c received represents a number of PDCCH or physical downlink shared channel (PDSCH) without a corresponding PDCCH received in the at least one subframe n−k and the cell c,

when spatial bundling is not applied, N k,c received represents a number of transport blocks received or semi-persistent scheduling (SPS) release PDCCH received in the at least one subframe n−k and the cell c, and

mod represents a modulo operation.

3. The method according to claim 2 , wherein a PUCCH transmission power is determined according to the following equation:

h

⁡

(

·

)

=

n

HARQ

+

n

SR

-

1

3

,

wherein N is a positive integer, and

n SR is a power adjustment parameter used to adjust the PUCCH transmission power in relation to a scheduling request (SR), and is set to 0 or 1.

4. The method according to claim 3 , wherein the PUCCH transmission power is determined according to the following equation:

P

PUCCH

⁡

(

n

)

=

min

⁢

{

P

CMAX

,

c

⁡

(

n

)

,

P

0

⁢

_

⁢

PUCCH

+

PL

c

+

h

⁡

(

·

)

+

Δ

F_PUCCH

⁡

(

F

)

+

Δ

T

×

D

⁡

(

F

′

)

+

g

⁡

(

i

)

}

,

wherein P PUCCH (n) represents the PUCCH transmission power,

P CMAX,c (n) represents a configured transmission power in the subframe n for the cell c,

P 0 _ PUCCH is determined based on at least one parameter provided by a higher layer,

PL c is a downlink path loss estimate of the cell c,

Δ F _ PUCCH (F) represents a value corresponding to a PUCCH format,

Δ TxD (F′) is a value provided by the higher layer or 0, and

g(i) represents a current PUCCH power control adjustment state.

5. The method according to claim 1 , wherein the UL-DL configuration is one of UL-DL configurations #1 to #6 as shown in the following table:

Uplink-downlink

Subframe number

configuration

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 D denotes a subframe for downlink, S denotes a subframe comprising a downlink period, a guard period, and an uplink period, and U denotes a subframe for uplink.

6. The method according to claim 5 , wherein the UL-DL configuration is UL-DL configuration #5.

7. The method according to claim 1 , wherein the at least one subframe n−k is associated with the UL subframe n according to k defined by the following table:

UL-DL

Subframe n

Configuration

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, 7, 11

6, 5, 4, 7

—

—

—

—

—

—

5

—

—

13, 12, 9, 8, 7, 5, 4, 11, 6

—

—

—

—

—

—

—

6

—

—

7

7

5

—

—

7

7

—.

8. The method according to claim 1 , wherein the scheduling-related PDCCHs include at least one of a PDCCH with PDSCH or a PDCCH indicating SPS release.

9. The method according to claim 1 , wherein the PUCCH corresponds to a PUCCH format 3.

10. The method according to claim 1 , wherein the wireless communication system supports carrier aggregation of a plurality of component carriers.

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

a processor configured to determine a physical uplink control channel (PUCCH) transmission power parameter according to an uplink-downlink (UL-DL) configuration of a cell and a specific equation; and

a radio frequency (RF) unit operatively connected to the processor and configured to transmit a hybrid automatic repeat request-acknowledgement (HARQ-ACK) signal to a base station via a PUCCH in an uplink (UL) subframe in accordance with the determined PUCCH transmission power parameter,

wherein the specific equation includes applying a modulo-4 operation to a difference between a downlink assignment index (DAI) number and a number of physical downlink control channels (PDCCHs), the DAI number corresponding to a value of a DAI in a PDCCH lastly detected within at least one subframe associated with the UL subframe in the cell, and the number of PDCCHs corresponding to a total number of scheduling-related PDCCHs detected within the at least one subframe associated with the UL subframe in the cell.

12. The user equipment of claim 11 , wherein:

the UL subframe corresponds to a subframe n,

the PUCCH transmission power parameter is n HARQ ,

the specific equation is:

n

HARQ

=

∑

c

=

0

C

-

1

⁢

(

(

(

V

DAI

,

c

DL

-

U

DAI

,

c

)

⁢

mod

⁢

⁢

4

)

·

n

c

ACK

+

∑

k

∈

K

⁢

N

k

,

c

received

)

,

wherein C denotes a number of cells configured for the user equipment,

K denotes a set having M elements k (kεK) according to the UL-DL configuration, M is a positive integer,

V DAI,c DL is the DAI number having a value indicated by a 2-bit DAI field included in the PDCCH lastly detected within the at least one subframe n−k in the cell c,

U DAI,c denotes the total number of scheduling-related PDCCHs detected within the at least one subframe n−k in the cell c,

n c ACK denotes a number of HARQ-ACK bits corresponding to the configured downlink transmission mode on the cell c, and is set to 1 when spatial bundling is applied,

when spatial bundling is applied, N k,c received represents a number of PDCCH or physical downlink shared channel (PDSCH) without a corresponding PDCCH received in the at least one subframe n−k and the cell c,

when spatial bundling is not applied, N k,c received represents a number of transport blocks received or semi-persistent scheduling (SPS) release PDCCH received in the at least one subframe n−k and the cell c, and

mod represents a modulo operation.

13. The user equipment according to claim 12 , wherein the PUCCH transmission power is determined according to the following equation:

h

⁡

(

·

)

=

n

HARQ

+

n

SR

-

1

N

,

wherein N is a positive integer, and

n SR is a power adjustment parameter used to adjust the PUCCH transmission power in relation to a scheduling request (SR), and is set to 0 or 1.

14. The user equipment according to claim 13 , wherein the PUCCH transmission power is determined according to the following equation:

P

PUCCH

⁡

(

n

)

=

min

⁢

{

P

CMAX

,

c

⁡

(

n

)

,

P

0

⁢

_

⁢

PUCCH

+

PL

c

+

h

⁡

(

·

)

+

Δ

F_PUCCH

⁡

(

F

)

+

Δ

T

×

D

⁡

(

F

′

)

+

g

⁡

(

i

)

}

,

wherein P PUCCH (n) represents the PUCCH transmission power,

P CMAX,c (n) represents a configured transmission power in the subframe n for the cell c,

P 0 _ PUCCH is determined based on at least one parameter provided by a higher layer,

PL c is a downlink path loss estimate of the cell c,

Δ F _ PUCCH (F) represents a value corresponding to a PUCCH format,

ΔTxD(F′) is a value provided by the higher layer or 0, and

g(i) represents a current PUCCH power control adjustment state.

15. The user equipment according to claim 11 , wherein the UL-DL configuration is one of UL-DL configurations #1 to #6 as shown in the following table:

Uplink-downlink

Subframe number

configuration

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 D denotes a subframe for downlink, S denotes a subframe comprising a downlink period, a guard period, and an uplink period, and U denotes a subframe for uplink.

16. The user equipment according to claim 15 , wherein the UL-DL configuration is UL-DL configuration #5.

17. The user equipment according to claim 11 , wherein the at least one subframe n-k is associated with the UL subframe n according to k defined by the following table:

UL-DL

Subframe n

Configuration

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, 7, 11

6, 5, 4, 7

—

—

—

—

—

—

5

—

—

13, 12, 9, 8, 7, 5, 4, 11, 6

—

—

—

—

—

—

—

6

—

—

7

7

5

—

—

7

7

—.

18. The user equipment according to claim 11 , wherein the scheduling-related PDCCHs include at least one of a PDCCH with PDSCH or a PDCCH indicating SPS release.

19. The user equipment according to claim 11 , wherein the PUCCH corresponds to a PUCCH format 3.

20. The user equipment according to claim 11 , wherein the wireless communication system supports carrier aggregation of a plurality of component carriers.