Method for transmitting control information in wireless communication system and apparatus therefor
A method for transmitting information data by using a Reed-Muller coding scheme in a wireless communication system is disclosed. The method includes the steps of configuring a number of resource elements for transmitting the information data; when a bit size of the information data is equal to or larger than a predetermined number, allocating even-numbered data of the information data as first information data, and allocating odd-numbered data of the information data as second information data; applying RM coding on each of the first information data and the second information data; concatenating the coded first information data and the coded second information data, and transmitting the concatenated data by using the predetermined number of resource elements.
1. A method for transmitting information data by using an RM (Reed-Muller) coding scheme in a wireless communication system, the method comprising:
configuring a number of resource elements for transmitting the information data;
when a bit size of the information data is equal to or larger than a predetermined number, rearranging the information data such that odd-numbered bits of the information data are located after even-numbered bits of the information data, and configuring bits of a first half of the rearranged information data as first information data and bits of a second half of the rearranged information data as second information data;
coding each of the first information data and the second information data by applying the RM coding scheme;
concatenating the coded first information data and the coded second information data; and
transmitting the concatenated data by using the number of resource elements,
wherein a minimum value Q′ min for the number of resource elements is defined by a sum of a minimum value Q′ min — 1 for the number of resource elements corresponding to the first information data and a minimum value Q′ min — 2 for the number of resource elements corresponding to the second information data,
wherein Q′ min — 1 and Q′ min — 2 are defined by the following Equations:
<Equations>
Q
min
_
1
′
=
⌈
2
×
O
2
Q
m
⌉
and
Q
min
_
2
′
=
⌈
2
×
(
O
-
⌈
O
2
⌉
)
Q
m
⌉
=
⌈
2
×
⌊
O
2
⌋
Q
m
⌉
,
wherein Q m indicates a bit size per symbol according to a modulation order.
2. The method of claim 1 , wherein the information data corresponds to UCI (Uplink Control Information), and wherein the Uplink Control Information is transmitted through a Physical Uplink Shared Channel (PUSCH).
3. The method of claim 1 , wherein the predetermined number corresponds to 12 bits.
4. The method of claim 1 , wherein each bit size of the coded first information data and the coded second information data corresponds to 32 bits.
5. The method of claim 2 , wherein the Uplink Control Information includes HARQ (Hybrid Automatic Retransmission reQuest)-ACK/NACK (Acknowledgment/Negative Acknowledgment) data or an RI (Rank Indicator).
6. The method of claim 1 ,
wherein, when the information data corresponds to o 0 , o 1 , o 2 , . . . , o Q−1 , where Q denotes the bit size of the information data, the rearranged information data b 0 , b 1 , b 2 , . . . , b Q−1 is defined by Equation A and Equation B below,
b i/2 =o i , where i is an even number, <Equation A>
b ┌Q/2┐+(i−1)/2 =o i , where i is an odd number; <Equation B>
wherein the first information data corresponds to b 0 , b 1 , b 2 , . . . ,b ┌Q/2 ┐−1 and the second information data corresponds to b ┌Q/2 ┐ , b ┌Q/2 ┐+1 , b ┌Q/2 ┐+2 , . . . , b Q−1 .
7. A transmitting apparatus of a wireless communication system, the transmitting apparatus comprising:
a processor configured to:
calculate a number of resource elements for transmitting information data, when a bit size of the information data is equal to or larger than a predetermined number,
rearrange the information data such that odd-numbered bits of the information data are located after even-numbered bits of the information data,
configure bits of a first half of the rearranged information data as first information data and bits of a second half of the rearranged information data as second information data,
code each of the first information data and the second information data by applying a Reed-Muller (RM) coding scheme, and
concatenate the coded first information data and the coded second information data; and
a transmission module configured to transmit the concatenated data by using the number of resource elements,
wherein a minimum value Q′ min for the number of resource elements is defined by a sum of a minimum value Q′ min — 1 for the number of resource elements corresponding to the first information data and a minimum value Q′ min — 2 for the number of resource elements corresponding to the second information data,
wherein Q′ min — 1 and Q′ min — 2 are defined by the following Equations:
<Equations>
Q
min
_
1
′
=
⌈
2
×
O
2
Q
m
⌉
and
Q
min
_
2
′
=
⌈
2
×
(
O
-
⌈
O
2
⌉
)
Q
m
⌉
=
⌈
2
×
⌊
O
2
⌋
Q
m
⌉
,
wherein Q m indicates a bit size per symbol according to a modulation order.
8. The transmitting apparatus of claim 7 , wherein the information data corresponds to UCI (Uplink Control Information), and wherein the Uplink Control Information is transmitted through a Physical Uplink Shared Channel (PUSCH).
9. The transmitting apparatus of claim 7 , wherein the predetermined number corresponds to 12 bits.
10. The transmitting apparatus of claim 7 , wherein each bit size of the coded first information data and the coded second information data corresponds to 32 bits.
11. The transmitting apparatus of claim 8 , wherein the Uplink Control Information includes HARQ (Hybrid Automatic Retransmission reQuest)-ACK/NACK (Acknowledgment/Negative Acknowledgment) data or an RI (Rank Indicator).
12. The transmitting apparatus of claim 7 , wherein, when the information data corresponds to o 0 , o 1 , o 2 , . . . , o Q−1 , where Q denotes the bit size of the information data, the rearranged information data b 0 , b 1 , b 2 , . . . , b Q−1 is defined by Equation A and Equation B below,
b i/2 =o i , where i is an even number, <Equation A>
b ┌Q/2 ┐+(i−1)/2 =o i , where i is an odd number, <Equation B>
wherein the first information data corresponds to b 0 , b 1 , b 2 , . . . b ┌Q/2┐−1 and the second information data corresponds to b ┌Q/2 ┐ , b ┌Q/2┐+1 , b ┌Q/2┐+2 , . . . , b Q−1 .