Method and device for transmitting uplink control information having large payload in wireless access system
The present invention relates to a method and devices for transmitting uplink control information (UCI) having a large payload size in a carrier aggregation environment. The method for transmitting the UCI having a large sized payload in a wireless access system, as an embodiment of the present invention, comprises the steps of: finding the number of first resource elements allocated to channel quality information (CQI) information to be included in the UCI; finding the number of second resource elements allocated to a rank indicator (RI) information to be included in the UCI; finding the coding rate of data transmitted with the UCI, considering the number of the first resource elements and the number of the second resource elements; finding the number of third resource elements allocated to all of the UCI, on the basis of the coding rate of the data; and multiplexing to a physical uplink shared channel (PUSCH) and sending to a base station the UCI, on the basis of the number of the third resource elements.
1. A method for transmitting Uplink Control Information (UCI) having a large payload size in a wireless access system, the method comprising:
obtaining a number of first Resource Elements (REs) allocated to a Channel Quality Indicator (CQI) information to be included in the UCI;
obtaining a number of second REs allocated to a Rank Indicator (RI) information to be included in the UCI;
obtaining a coding rate of data transmitted along with the UCI according to the number of the first REs and the number of the second REs;
obtaining a number of third REs allocated to the UCI based on the coding rate of the data; and
transmitting the UCI to a Base Station (BS) by multiplexing the UCI into a Physical Uplink Shared CHannel (PUSCH) based on the number of the third REs,
wherein when the coding rate of the data is obtained, a number of fourth REs allocated to an ACKnowledgement/Negative ACKnowledgement (ACK/NACK) information to be included in the UCI is not considered, and
wherein the number of the first REs is calculated by:
(
O
+
L
)
·
(
M
sc
PUSCH_initial
·
N
Symb
PUSCH_initial
-
Q
RI
′
)
·
β
offset
CQI
∑
r
=
0
C
-
1
K
r
+
(
O
+
L
)
·
β
offset
CQI
,
where O is a number of CQI bits, L is a number of Cyclic Redundancy Check, CRC, bits added to the CQI bits, M sc PUSCH-intial is a number of subcarriers in an initial PUSCH transmission subframe, N symb PUSCH-initial is a number of Single Carrier frequency Division Multiple Access, SC-FDMA, symbols in the initial PUSCH transmission subframe, Q′ RI is a number RI code symbols, β offset CQI is a first beta offset determined according to a number of transmission codewords for transmission blocks, C is a total number of code blocks, CBs, K r is a size of each of the CBs, and r is a code block number.
2. The method according to claim 1 , further comprising, performing codeword-to-layer mapping on the UCI at a bit level.
3. The method according to claim 1 , further comprising performing codeword-to-layer mapping on the UCI at the level of a vector sequence allocated per modulation symbol.
4. The method according to claim 1 , further comprising performing codeword-to-layer mapping on the UCI at the level of a bit stream having as many bits as required for modulation symbols allocated to one row in a channel interleaver.
5. The method according to claim 1 , further comprising performing codeword-to-layer mapping on the UCI at the level of a bit stream having as many bits as the number of columns in a channel interleaver.
6. The method according to claim 1 , wherein the number of the second REs is calculated by:
O
RI
·
β
offset
RI
·
M
sc
PUSCH_initial
·
N
symb
PUSCH_initial
∑
r
=
0
C
(
1
)
-
1
K
r
(
1
)
+
∑
r
=
0
C
(
2
)
-
1
K
r
(
2
)
+
∑
r
=
0
C
(
1
)
-
1
K
r
(
1
)
+
∑
r
=
0
C
(
2
)
-
1
K
r
(
2
)
∑
r
=
0
C
(
CQI
)
-
1
K
r
(
CQI
)
(
O
CQI
+
L
)
β
offset
CQI
+
O
RI
·
β
offset
RI
,
where O RI is a number of RI bits, β offset RI is a second beta offset determined according to the number of the transmission codewords, K r (1) is a size of a first CB and K r (2) is a size of a second CB in a case of when two CBs are used, K r (CQI) is a size of a CB carrying the CQI, and O CQI is the number of CQI bits.
7. The method according to claim 1 , wherein the number of the fourth REs is calculated by:
O
ACK
·
β
offset
ACK
·
M
sc
PUSCH_initial
·
N
symb
PUSCH_initial
∑
r
=
0
C
(
1
)
-
1
K
r
(
1
)
+
∑
r
=
0
C
(
2
)
-
1
K
r
(
2
)
+
∑
r
=
0
C
(
1
)
-
1
K
r
(
1
)
+
∑
r
=
0
C
(
2
)
-
1
K
r
(
2
)
∑
r
=
0
C
(
CQI
)
-
1
K
r
(
CQI
)
(
O
CQI
+
L
)
β
offset
CQI
+
O
RI
·
β
offset
RI
+
O
ACK
·
β
offset
ACK
,
where O ACK is a number of ACK/NACK bits,β offset ACK is a third beta offset determined according to the number of the transmission codewords, K r (1) is a size of a first CB and K r (2) is a size of a second CB in a case of when two CBs are used, K r (CQI) is a size of a CB carrying the CQI, O CQI is the number of CQI bits, O RI is a number of RI bits, β offset RI is a second beta offset determined according to the number of the transmission codewords.
8. A User Equipment (UE) for transmitting Uplink Control Information (UCI) having a large payload size in a wireless access system, the UE comprising:
a transmission module configured to transmit a wireless signal through an antenna;
a reception module configured to receive a wireless signal through the antenna; and
a processor configured to support transmission of the UCI having the large payload size,
wherein the processor obtains a number of first Resource Elements (REs) allocated to a Channel Quality Indicator (CQI) information to be included in the UCI, obtains a number of second REs allocated to a Rank Indicator (RI) information to be included in the UCI, obtains a coding rate of data transmitted along with the UCI according to the number of the first REs and the number of the second REs, obtains a number of third REs allocated to the UCI based on the coding rate of the data, and controls the transmission module to transmit the UCI to a Base Station (BS) through the antenna by multiplexing the UCI into a Physical Uplink Shared CHannel (PUSCH) based on the number of the third REs, and
wherein when the coding rate of the data is obtained, the processor does not consider a number of fourth REs allocated to an ACKnowledgement/Negative ACKnowledgement (ACK/NACK) information to be included in the UCI, and
wherein the number of the first REs is calculated by:
(
O
+
L
)
·
(
M
sc
PUSCH_initial
·
N
Symb
PUSCH_initial
-
Q
RI
′
)
·
β
offset
CQI
∑
r
=
0
C
-
1
K
r
+
(
O
+
L
)
·
β
offset
CQI
,
where O is a number of COI bits, L is a number of Cyclic Redundancy Check, CRC, bits added to the CQI bits, M sc PUSCH-initial is a number of subcarriers in an initial PUSCH transmission subframe, N symb PUSCH-initial is a number of Single Carrier frequency Division Multiple Access, SC-FDMA, symbols in the initial PUSCH transmission subframe, Q′ RI is a number of RI code symbols, β offset CQI is a first beta offset determined according to a number of transmission codewords for transmission blocks, C is a total number of code blocks, CBs, K r is a size of each of the CBs, and r is a code block number.
9. The UE according to claim 8 , wherein the processor performs codeword-to-layer mapping on the UCI at a bit level, at the level of a vector sequence allocated per modulation symbol, at the level of a bit stream having as many bits as required for modulation symbols allocated to one row in a channel interleaver, or at the level of a bit stream having as many bits as the number of columns in a channel interleaver.
10. The UE according to claim 8 , wherein the number of the second REs is calculated by;
O
RI
·
β
offset
RI
·
M
sc
PUSCH_initial
·
N
symb
PUSCH_initial
∑
r
=
0
C
(
1
)
-
1
K
r
(
1
)
+
∑
r
=
0
C
(
2
)
-
1
K
r
(
2
)
+
∑
r
=
0
C
(
1
)
-
1
K
r
(
1
)
+
∑
r
=
0
C
(
2
)
-
1
K
r
(
2
)
∑
r
=
0
C
(
CQI
)
-
1
K
r
(
CQI
)
(
O
CQI
+
L
)
β
offset
CQI
+
O
RI
·
β
offset
RI
,
where is a number of RI bits, β offset RI is a second beta offset determined according to the number of the transmission codewords, K r (1) is a size of a first CB and K r (2) is a size of a second CB in a case of when two CBs are used, K r (CQI) is a size of a CB carrying the CQI, and O CQI is the number of CQI bits.
11. The UE according to claim 8 , wherein the number of the fourth REs is calculated by:
O
ACK
·
β
offset
ACK
·
M
sc
PUSCH_initial
·
N
symb
PUSCH_initial
∑
r
=
0
C
(
1
)
-
1
K
r
(
1
)
+
∑
r
=
0
C
(
2
)
-
1
K
r
(
2
)
+
∑
r
=
0
C
(
1
)
-
1
K
r
(
1
)
+
∑
r
=
0
C
(
2
)
-
1
K
r
(
2
)
∑
r
=
0
C
(
CQI
)
-
1
K
r
(
CQI
)
(
O
CQI
+
L
)
β
offset
CQI
+
O
RI
·
β
offset
RI
+
O
ACK
·
β
offset
ACK
,
where O ACK is a number of ACK/NACK bits, β offset ACK is a third beta offset determined according to the number of the transmission codewords, K r (1) is a size of a first CB and K r (2) is a size of a second CB in a case of when two CBs are used, K r (CQI) is a size of a CB carrying the CQI, O CQI is the number of CQI bits, O RI is a number of RI bits, β offset RI is a second beta offset determined according to the number of the transmission codewords.