Method and apparatus for transmitting control information in wireless communication system
A wireless communication system is disclosed. Disclosed herein are methods for transmitting a physical uplink control channel (PUCCH) signal in a wireless communication system, which includes setting transmit power for the PUCCH signal, and an apparatus thereof. If the PUCCH signal is transmitted on a subframe configured for a scheduling request (SR), the PUCCH signal includes one or more hybrid automatic repeat request acknowledgement (HARQ-ACK) bits and an SR bit. When determining the transmit power for the PUCCH, the SR bit is selectively considered depending on whether or not a transport block for an uplink shared channel (UL-SCH) is present in the subframe.
1. A method for transmitting a physical uplink control channel (PUCCH) signal by a communication apparatus in a wireless communication system, comprising:
setting transmit power for the PUCCH signal,
wherein, if the PUCCH signal is transmitted on a subframe configured for a scheduling request (SR), the PUCCH signal includes one or more hybrid automatic repeat request acknowledgement (HARQ-ACK) bits and an SR bit, and
wherein the transmit power for the PUCCH is determined by using the following equation:
h
(
·
)
=
n
HARQ
+
n
SR
-
1
N
where, n HARQ is associated with the number of information bits of HARQ-ACK, N denotes a positive integer, and n SR is 1 when a transport block for an uplink shared channel (UL-SCH) is not present at the subframe and is 0 when the transport block for the UL-SCH is present at the subframe.
2. The method according to claim 1 , wherein the transmit power for the PUCCH signal at a subframe i is determined by using the following equation:
P
PUCCH
(
i
)
=
min
{
P
CMAX
,
c
(
i
)
,
P
0
_
PUCCH
+
PL
c
+
h
(
·
)
+
Δ
F
_
PUCCH
(
F
)
+
Δ
TxD
(
F
′
)
+
g
(
i
)
}
where, P PUCCH (i) denotes transmit power for the PUCCH, P CMAX,c (i) denotes maximum transmit power configured for a serving cell c, P 0 — PUCCH denotes a parameter configured by a higher layer, PL c denotes a downlink path loss estimation value of the serving cell c, Δ F — PUCCH (F) denotes a value corresponding to a PUCCH format, Δ T×D (F′) denotes a value configured by the higher layer or 0, and g(i) denotes a current PUCCH power control adjustment state.
3. The method according to claim 1 , wherein the SR bit is attached to the end of the one or more HARQ-ACK bits.
4. The method according to claim 3 , wherein the SR bit is set to 1 in case of a positive SR and is set to 0 in case of a negative SR.
5. The method according to claim 1 , wherein the communication apparatus is configured with a simultaneous PUCCH-and-physical uplink shared channel (PUSCH) transmission mode.
6. The method according to claim 1 , wherein N is 2 or 3.
7. The method according to claim 1 , wherein the one or more HARQ-ACK bits and the SR bit are joint-coded.
8. A communication apparatus configured to transmit a physical uplink control channel (PUCCH) signal in a wireless communication system, comprising:
a radio frequency (RF) unit; and
a processor configured to set transmit power for the PUCCH signal,
wherein, if the PUCCH signal is transmitted on a subframe configured for a scheduling request (SR), the PUCCH signal includes one or more hybrid automatic repeat request acknowledgement (HARQ-ACK) bits and an SR bit, and
wherein the transmit power for the PUCCH is determined by using the following equation:
h
(
·
)
=
n
HARQ
+
n
SR
-
1
N
where, n HARQ is associated with the number of information bits of HARQ-ACK, N denotes a positive integer, and n SR is 1 when a transport block for an uplink shared channel (UL-SCH) is not present at the subframe and is 0 when the transport block for the UL-SCH is present at the subframe.
9. The communication apparatus according to claim 8 , wherein the transmit power for the PUCCH signal at a subframe i is determined by using the following equation:
P
PUCCH
(
i
)
=
min
{
P
CMAX
,
c
(
i
)
,
P
0
_
PUCCH
+
PL
c
+
h
(
·
)
+
Δ
F
_
PUCCH
(
F
)
+
Δ
TxD
(
F
′
)
+
g
(
i
)
}
where, P PUCCH (i) denotes transmit power for the PUCCH, P CMAX,c (i) denotes maximum transmit power configured for a serving cell c, P 0 — PUCCH denotes a parameter configured by a higher layer, PL c denotes a downlink path loss estimation value of the serving cell c, Δ F — PUCCH (F) denotes a value corresponding to a PUCCH format, Δ T×D (F′) denotes a value configured by the higher layer or 0, and g(i) denotes a current PUCCH power control adjustment state.
10. The communication apparatus according to claim 8 , wherein the SR bit is attached to the end of the one or more HARQ-ACK bits.
11. The communication apparatus according to claim 10 , wherein the SR bit is set to 1 in case of a positive SR and is set to 0 in case of a negative SR.
12. The communication apparatus according to claim 8 , wherein the communication apparatus is configured with a simultaneous PUCCH-and-physical uplink shared channel (PUSCH) transmission mode.
13. The communication apparatus according to claim 8 , wherein N is 2 or 3.
14. The communication apparatus according to claim 8 , wherein the one or more HARQ-ACK bits and the SR bit are joint-coded.