Method for transmitting control information and device for same

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

determining, by the user equipment, a PUCCH (Physical Uplink Control Channel) transmission power parameter n HARQ according to an UL-DL (Uplink-Downlink) configuration and the following equation:

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 configured cells,

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 a value indicated by a 2-bit DAI (Downlink Assignment Index) field included in a downlink scheduling-related PDCCH (Physical Downlink Control Channel) lastly detected within subframe(s) n−k in a serving cell c,

U DAI,c denotes a total number of downlink scheduling-related PDCCHs detected within the subframe(s) n−k in the serving cell c,

n c ACK denotes a number of HARQ-ACK bits corresponding to a configured downlink transmission mode on the serving 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 PDSCH (Physical Downlink Shared Channel) without a corresponding PDCCH received in the subframe(s) n−k and the serving cell c,

when spatial bundling is not applied, N k,c received represents a number of transport blocks received or SPS (Semi-Persistent Scheduling) release PDCCH received in the subframe(s) n−k and the serving cell c, and

mod represents a modulo operation; and

transmitting, by the user equipment, a HARQ-ACK (Hybrid Automatic Repeat reQuest-Acknowledgement) signal via a PUCCH in a subframe n in accordance with the determined PUCCH transmission power parameter.

2. The method according to claim 1 , wherein a transmission power for the PUCCH 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 transmission power for the PUCCH in relation to SR (Scheduling Request), and is set to 0 or 1.

3. The method according to claim 2 , wherein the transmission power for the PUCCH 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 transmission power for the PUCCH,

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

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

5. The method according to claim 4 , wherein the UL-DL configuration is UL-DL configuration #5.

6. A communication device configured to transmit uplink control information in a TDD (Time Division Duplex) wireless communication system, the communication device comprising:

a processor,

wherein the processor is configured to:

determine a PUCCH (Physical Uplink Control Channel) transmission power parameter n HARQ according to an UL-DL (Uplink-Downlink) configuration and the following equation:

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 configured cells,

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 a value indicated by a 2-bit DAI (Downlink Assignment Index) field included in a downlink scheduling-related PDCCH lastly detected within subframe(s) u−k in a serving cell c,

U DAI,c denotes a total number of downlink scheduling-related PDCCHs detected within the subframe(s) n-k in the serving cell c,

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

wherein when spatial bundling is applied, N k,c received represents a number of PDCCH or PDSCH without a corresponding PDCCH received in the subframe(s) n−k and the serving cell c,

wherein when spatial bundling is not applied, N k,c received represents a number of transport blocks or SPS (Semi-Persistent Scheduling) release PDCCH received in the subframe(s) n−k and the serving cell c, and

wherein mod represents a modulo operation; and

a radio frequency (RF) unit coupled to the processor, wherein the RF unit is configured to transmit a HARO-ACK (Hybrid Automatic Repeat reQuest-Acknowledgement) signal via a PUCCH (Physical Uplink Control Channel) in a subframe n in accordance with the determined PUCCH transmission power parameter.

7. The communication device according to claim 6 , wherein a transmission power for the PUCCH 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 transmission power for the PUCCH in relation to SR, and is set to 0 or 1.

8. The communication device according to claim 7 , wherein the transmission power for the PUCCH 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 transmission power for the PUCCH,

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

9. The communication device according to claim 6 , 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 downlink subframe, S denotes a subframe comprising a downlink period, a guard period, and an uplink period, and U denotes an uplink subframe.

10. The communication device according to claim 9 , wherein the UL-DL configuration is UL-DL configuration #5.