Method for transmitting control information and apparatus for same
A method for transmitting uplink control information and an apparatus thereto are disclosed, wherein the method includes: generating a plurality of HRAQ-ACKs; selecting one first resource index and two second resource indices, each corresponding to the plurality of HARQ-ACKs; transmitting through a first antenna port a first modulation symbol and a first reference signal for demodulating the first modulation symbol; and transmitting through a second antenna port a second modulation symbol and a second reference signal for demodulating the second modulation symbol. Both a transmission resource for the first modulation symbol and a transmission resource for the first reference signal are given using one first resource index. A transmission resource for the second modulation symbol is given using one of two second resource indices, and a transmission resource for the second reference signal is given using the other of two second resource indices.
1. A method for transmitting uplink control information performed by a User Equipment (UE) in a wireless communication system, comprising:
generating a plurality of hybrid ARQ acknowledgements (HARQ-ACKs);
selecting, from among a plurality of resource indices, one first resource index for a first antenna port and two second resource indices for a second antenna port corresponding to the plurality of HARQ-ACKs;
transmitting, through the first antenna port to a base station (BS), a first modulation symbol corresponding to the plurality of HARQ-ACKs and a first reference signal for demodulating the first modulation symbol; and
transmitting, through the second antenna port to the BS, a second modulation symbol corresponding to the plurality of HARQ-ACKs and a second reference signal for demodulating the second modulation symbol,
wherein a transmission resource for the first modulation symbol, a transmission resource for the first reference signal, a transmission resource for the second modulation symbol, and a transmission resource for the second reference signal are defined by the following equation:
[Equation]
n PUCCH,RS (1,p=p 0 ) =n PUCCH (1)
n PUCCH,DATA (1,p=p 0 ) =n PUCCH (1)
n PUCCH,RS (1,p=p 1 ) =( n PUCCH (1) +2)mod(4)
n
PUCCH
,
DATA
(
1
,
p
=
p
1
)
=
n
PUCCH
,
RS
(
1
,
p
=
p
1
)
+
(
-
1
)
n
PUCCH
,
RS
(
1
,
p
=
p
1
)
where p 0 represents the first antenna port, p 1 represents the second antenna port, both n PUCCH,RS (1,p=p 0 ) and n PUCCH,DATA (1,p=p 0 ) represent the one first resource index, and n PUCCH,RS (1,p=p 1 ) and n PUCCH,DATA (1,p=p 1 ) represent the two second resource indices, respectively, and n PUCCH (1) represents a resource index defined for a single antenna transmission, and
wherein n PUCCH,RS (1,p=p 0 ) indicates the transmission resource for the first reference signal, n PUCCH,DATA (1,p=p 0 ) indicates the transmission resource for the first modulation symbol, n PUCCH,RS (1,p=p 1 ) indicates the transmission resource for the second reference signal, and n PUCCH,DATA (1,p=p 1 ) indicates the transmission resource for the second modulation symbol.
2. The method according to claim 1 , wherein the plurality of resource indices includes a plurality of physical uplink control channel (PUCCH) format 1b resource indices.
3. The method according to claim 1 , wherein the transmission resources for the first modulation symbol, the second modulation symbol, the first reference signal and the second reference signal include at least one of a physical resource block (PRB), a cyclic shift (CS) and an orthogonal cover code (OCC).
4. The method according to claim 1 , wherein a PRB, a CS and an OCC used for transmission of the first modulation symbol are identical to a PRB, a CS and an OCC used for transmission of the first reference signal, and
wherein at least one of a PRB, a CS and an OCC used for transmission of the second modulation symbol is different from a PRB, a CS and an OCC used for transmission of the second reference signal.
5. The method according to claim 1 , wherein, when normal cyclic prefix (CP) is configured, the first and second modulation symbols are transmitted on single carrier frequency division multiple access (SC-FDMA) symbols #0, #1, #5 and #6 in a slot and the first and second reference signals are transmitted on SC-FDMA symbols #2, #3 and #4 in the slot.
6. The method according to claim 1 , wherein, when extended CP is configured, the first and second modulation symbols are transmitted on SC-FDMA symbols #0, #1, #4 and #5 in a slot and the first and second reference signals are transmitted on SC-FDMA symbols #2 and #3 in the slot.
7. A User Equipment (UE) configured to transmit uplink control information in a wireless communication system, comprising:
a radio frequency (RF) unit; and
a processor,
wherein the processor generates a plurality of hybrid HARQ-ACKs, selects, from among a plurality of resource indices, one first resource index for a first antenna port and two second resource indices for a second antenna port corresponding to the plurality of HARQ-ACKs, controls the RF unit to transmit, through the first antenna port to a base station (BS), a first modulation symbol corresponding to the plurality of HARQ-ACKs and a first reference signal for demodulating the first modulation symbol and control the RF unit to transmit, through the second antenna port to the BS, a second modulation symbol corresponding to the plurality of HARQ-ACKs and a second reference signal for demodulating the second modulation symbol,
wherein a transmission resource for the first modulation symbol, a transmission resource for the first reference signal, a transmission resource for the second modulation symbol, and a transmission resource for the second reference signal are defined by the following equation:
[Equation]
n PUCCH,RS (1,p=p 0 ) =n PUCCH (1)
n PUCCH,DATA (1,p=p 0 ) =n PUCCH (1)
n PUCCH,RS (1,p=p 1 ) =( n PUCCH (1) +2)mod(4)
n
PUCCH
,
DATA
(
1
,
p
=
p
1
)
=
n
PUCCH
,
RS
(
1
,
p
=
p
1
)
+
(
-
1
)
n
PUCCH
,
RS
(
1
,
p
=
p
1
)
where p 0 represents the first antenna port, p 1 represents the second antenna port, both n PUCCH,RS (1,p=p 0 ) and n PUCCH,DATA (1,p=p 0 ) represent the one first resource index, and n PUCCH,RS (1,p=p 1 ) and n PUCCH,DATA (1,p=p 1 ) represent the two second resource indices, respectively, and n PUCCH (1) represents a resource index defined for a single antenna transmission, and
wherein n PUCCH,RS (1,p=p 0 ) indicates the transmission resource for the first reference signal, n PUCCH,DATA (1,p=p 0 ) indicates the transmission resource for the first modulation symbol, n PUCCH,RS (1,p=p 1 ) indicates the transmission resource for the second reference signal, and n PUCCH,DATA (1,p=p 1 ) indicates the transmission resource for the second modulation symbol.
8. The UE according to claim 7 , wherein the plurality of resource indices includes a plurality of PUCCH format 1b resource indices.
9. The UE according to claim 7 , wherein the transmission resources for the first modulation symbol, the second modulation symbol, the first reference signal and the second reference signal include at least one of a PRB, a CS and an OCC.
10. The UE according to claim 7 , wherein a PRB, a CS and an OCC used for transmission of the first modulation symbol are identical to a PRB, a CS and an OCC used for transmission of the first reference signal, and
wherein at least one of a PRB, a CS and an OCC used for transmission of the second modulation symbol is different from a PRB, a CS and an OCC used for transmission of the second reference signal.
11. The UE according to claim 7 , wherein, when normal CP is configured, the first and second modulation symbols are transmitted on SC-FDMA symbols #0, #1, #5 and #6 in a slot and the first and second reference signals are transmitted on SC-FDMA symbols #2, #3 and #4 in the slot.
12. The UE according to claim 7 , wherein, when extended CP is configured, the first and second modulation symbols are transmitted on SC-FDMA symbols #0, #1, #4 and #5 in a slot and the first and second reference signals are transmitted on SC-FDMA symbols #2 and #3 in the slot.