Method and apparatus for transmitting channel quality control information in wireless access system

1. A method for transmitting channel quality control information (CQI) using two transport blocks in a wireless access system that supports hybrid automatic retransmit request (HARQ), the method comprising:

receiving, by a user equipment (UE), a physical downlink control channel (PDCCH) signal including downlink control information (DCI);

calculating the number of coded symbols, Q′, required to transmit the CQI using the DCI; and

transmitting the channel quality control information through a physical uplink shared channel (PUSCH) to which the HARQ is applied on the basis of the number of coded symbols,

wherein the number of coded symbols, Q′, is calculated by

min

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RI

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the DCI includes information M sc PUSCH-initial(x) on the number of subcarriers for a transport block for transmitting the channel quality control information, information C (x) on the number of code blocks related to the first transport block, and information K r (x) on the size of the code blocks,

wherein N symb PUSCH-initial(x) represents a number of single carrier-frequency division multiple access (SC-FDMA) symbols per initial PUSCH transmission, and

wherein ‘x’ denotes an index of the transport block which is one of the two transport blocks.

2. The method according to claim 1 , wherein the index ‘x’ represents a transport block having a higher modulation and coding scheme (MCS) level of the two transport blocks.

3. The method according to claim 1 , wherein when the two transport blocks have the same MCS level, the transport block is the first one of the two transport block.

4. The method according to claim 1 , wherein the UE transmits the channel quality control information by piggybacking on uplink data retransmitted using the HARQ.

5. The method according to claim 1 , further comprising:

calculating information about the uplink data,

wherein the information about the uplink data is calculated by

G=N L (x) ·( N symb PUSCH ·M sc PUSCH ·Q m (x) −Q CQI −Q RI (x) ).

6. A method for receiving channel quality control information (COI) using two transport blocks in a wireless access system that supports hybrid automatic retransmit request (HARQ), the method comprising:

transmitting, by an e-Node B, a physical downlink control channel (PDCCH) signal including downlink control information (DCI) to a user equipment (UE); and

receiving the channel quality control information through a physical uplink shared channel (PUSCH) to which the HARQ is applied from the UE;

wherein the number of coded symbols, Q′, required to transmit the CQI, is calculated by

min

(

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⌈

(

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+

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)

·

M

sc

PUSCH

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initial

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(

x

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·

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symb

PUSCH

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initial

⁡

(

x

)

·

β

offset

PUSCH

∑

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=

0

C

(

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1

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r

(

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,

M

sc

PUSCH

·

N

symb

PUSCH

-

Q

RI

(

x

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m

(

x

)

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,

the DCI includes information M sc PUSCH-initial(x) on the number of subcarriers for a transport block for transmitting the channel quality control information, information C (x) on the number of code blocks related to the transport block, and information K r (x) on the size of the code blocks,

wherein N symb PUSCH-initial(x) represents a number of single carrier-frequency division multiple access (SC-FDMA) symbols per initial PUSCH transmission, and

wherein ‘x’ denotes an index of the transport block which is one of the two transport blocks.

7. The method according to claim 6 , wherein the transport block is a transport block having a higher MCS level from the two transport blocks.

8. The method according to claim 6 , wherein when the two transport blocks have the same MCS level, the transport block is the first one of the two transport blocks.

9. The method according to claim 6 , wherein the channel quality control information is received by piggybacking on uplink data retransmitted using the HARQ.

10. The method according to claim 9 , wherein information about the uplink data is calculated by

G=N L (x) ·( N symb PUSCH ·M sc PUSCH ·Q m (x) −Q CQI −Q RI (x) ).

11. A UE for transmitting channel quality control information (CQI) using two transport blocks in a wireless access system that supports HARQ, the UE comprising:

a transmission module for transmitting a radio signal;

a reception module for receiving a radio signal; and

a processor configured to support transmission of the CQI,

wherein the UE receives a physical downlink control channel (PDCCH) signal including downlink control information (DCI), calculates the number of coded symbols, Q′, required to transmit the channel quality control information using the DCI, and transmits the channel quality control information through a PUSCH to which the HARQ is applied on the basis of the number of coded symbols,

wherein the number of coded symbols, Q′, is calculated by

min

(

⁢

⌈

(

O

+

L

)

·

M

sc

PUSCH

-

initial

⁡

(

x

)

·

N

symb

PUSCH

-

initial

⁡

(

x

)

·

β

offset

PUSCH

∑

r

=

0

C

(

x

)

-

1

⁢

K

r

(

x

)

⌉

,

M

sc

PUSCH

·

N

symb

PUSCH

-

Q

RI

(

x

)

Q

m

(

x

)

⁢

)

,

the DCI includes information M sc PUSCH-initial(x) on the number of subcarriers for a transport block for transmitting the channel quality control information, information C (x) on the number of code blocks related to the transport block, and information K r (x) on the size of the code blocks,

wherein N symb PUSCH-initial(x) represents a number of single carrier-frequency division multiple access (SC-FDMA) symbols per initial PUSCH transmission, and

wherein ‘x’ denotes an index of the transport block which is one of the two transport blocks.

12. The UE according to claim 11 , wherein the transport block is a transport block having a higher modulation and coding scheme (MCS) level from the two transport blocks.

13. The UE according to claim 11 , wherein when the two transport blocks have the same MCS level, the first one of the transport blocks is the transport block.

14. The UE according to claim 11 , wherein the UE piggybacks the channel quality control information on uplink data retransmitted using the HARQ.

15. The UE according to claim 11 , wherein the UE calculates information about the uplink data using

G=N L (x) ·( N symb PUSCH ·M sc PUSCH ·Q m (x) −Q CQI −Q RI (x) ).

16. An e-Node B (eNB) for transmitting channel quality control information (CQI) using two transport blocks in a wireless access system that supports HARQ, the eNB comprising:

a transmission module for transmitting a radio signal;

a reception module for receiving a radio signal; and

a processor configured to support transmission of the channel quality control information,

wherein the eNB transmits a physical downlink control channel (PDCCH) signal including downlink control information (DCI) to a user equipment (UE); and receives the channel quality control information through a physical uplink shared channel (PUSCH) to which the HARQ is applied from the UE;

wherein the number of coded symbols, Q′, required to transmit the CQI, is calculated by

min

(

⁢

⌈

(

O

+

L

)

·

M

sc

PUSCH

-

initial

⁡

(

x

)

·

N

symb

PUSCH

-

initial

⁡

(

x

)

·

β

offset

PUSCH

∑

r

=

0

C

(

x

)

-

1

⁢

K

r

(

x

)

⌉

,

M

sc

PUSCH

·

N

symb

PUSCH

-

Q

RI

(

x

)

Q

m

(

x

)

⁢

)

,

the DCI includes information M sc PUSCH-initial(x) on the number of subcarriers for a transport block for transmitting the channel quality control information, information C (x) on the number of code blocks related to the transport block, and information K r (x) on the size of the code blocks, and

wherein N symb PUSCH-initial(x) represents a number of single carrier-frequency division multiple access (SC-FDMA) symbols per initial PUSCH transmission, and

wherein ‘x’ denotes an index of the transport block which is one of the two transport blocks.

17. The e-Node B according to claim 16 , wherein the transport block is a transport block having a higher MCS level from the two transport blocks.

18. The e-Node B according to claim 16 , wherein when the two transport blocks have the same MCS level, the transport block is the first one of the two transport blocks.

19. The e-Node B according to claim 16 , wherein the channel quality control information is received by piggybacking on uplink data retransmitted using the HARQ.

20. The e-Node B according to claim 19 , wherein information about the uplink data is calculated by

G=N L (x) ·( N symb PUSCH ·M sc PUSCH ·Q m (x) −Q CQI −Q RI (x) ).