Power control method for uplink control channel, and apparatus
This application discloses a power control method for an uplink control channel, and an apparatus. Based on a time-frequency resource of a first physical uplink control channel (PUCCH) for carrying first uplink control information (UCI) and a time-frequency resource of a second PUCCH for carrying second UCI overlapping, a terminal sends the first UCI and the second UCI over a third PUCCH by using first power. The first power is determined based on a quantity of bits of the first UCI and/or a quantity of bits of the second UCI, to improve UCI transmission reliability in this scenario.
1 . An apparatus, comprising:
at least one processor configured to:
determine a first uplink control channel for carrying first uplink control information (UCI) and a second uplink control channel for carrying second UCI; and
based on a time domain resource of the first uplink control channel overlapping a time domain resource of the second uplink control channel, send the first UCI and the second UCI over a third uplink control channel by using a first power;
wherein:
the first power is determined based on a quantity of bits of the first UCI and a size of a time-frequency resource for carrying the first UCI via the third uplink control channel and not based on a quantity of bits of the second UCI and a size of a time-frequency resource for carrying the second UCI via the third uplink control channel, wherein a priority of the first UCI is higher than a priority of the second UCI.
2 . The apparatus according to claim 1 , wherein:
the first power is P PUCCH,b,f,c (i, q u , q d , l),
P
PUCCH
,
b
,
f
,
c
(
i
,
q
u
,
q
d
,
l
)
=
min
{
P
CMAX
,
f
,
c
(
i
)
,
P
O
_PUCCH
,
b
,
f
,
c
(
q
u
)
+
10
log
10
(
2
μ
M
RB
,
b
,
f
,
c
PUCCH
(
i
)
)
+
PL
b
,
f
,
c
(
q
d
)
+
Δ
F
_
PUCCH
(
F
)
+
Δ
TF
,
b
,
f
,
c
(
i
)
+
g
b
,
f
,
c
(
i
)
}
,
P CMAX,f,c (i) indicates maximum power that can be sent by a terminal, and z=min(x,y) indicates that z is equal to a smaller value between x and y,
P O_PUCCH,b,f,c ( q u )= P O_NOMINAL_PUCCH +P O_UE_PUCCH ( q u ),
P O_NOMINAL_PUCCH is a value configured by higher layer signaling p0-nominal, wherein when p0-nominal is not configured, P O_NOMINAL_PUCCH is equal to zero,
P O_UE_PUCCH (q u ) and PL b,f,c (q d ) are determined based on spatial relation information of the third uplink control channel,
M
RB
,
b
,
f
,
c
PUCCH
(
i
)
is a quantity of resource blocks allocated for the third uplink control channel,
μ indicates a subcarrier spacing used by the third uplink control channel; and
Δ F_PUCCH (F) is a value semi-statically configured by using a higher-layer parameter.
3 . The apparatus according to claim 2 ,
wherein the third uplink control channel is physical uplink control channel (PUCCH) Format 2, PUCCH Format 3, or PUCCH Format 4, and
wherein Δ TF,b,f,c (i) is determined based on the quantity of bits of the first UCI and the size of the time-frequency resource for carrying the first UCI via the third uplink control channel.
4 . The apparatus according to claim 3 , wherein:
Δ TF,b,f,c (i)=10 log 10 (K 1 ·(n HARQ-ACK (i)+O SR (i)+O CSI (i)/N RE (i), wherein K 1 =6,
n HARQ-ACK (i) indicates a quantity of bits of an acknowledgement/negative acknowledgement (ACK/NACK) in the first UCI,
O SR (i) indicates a quantity of bits of a scheduling request (SR) in the first UCI,
O CSI (i) indicates a quantity of bits of channel state information (CSI) in the first UCI, and
N RE (i) indicates the size of the time-frequency resource for carrying the first UCI via the third uplink control channel.
5 . The apparatus according to claim 3 , wherein:
Δ TF,b,f,c (i)=10 log 10 (2 K 2 ·BPRE(i) −1), wherein K 2 =2.4,
BPRE( i )=( O ACK ( i )+ O SR ( i )+ O CSI ( i )+ O CRC ( i ))/ N RE ( i ),
O ACK (i) indicates a quantity of bits of an acknowledgement/negative acknowledgement (ACK/NACK) in the first UCI,
O SR (i) indicates a quantity of bits of a scheduling request (SR) in the first UCI,
O CSI (i) indicates a quantity of bits of channel state information (CSI) in the first UCI,
O CRC (i) is a quantity of check bits of the first UCI, and
N RE (i) indicates the size of the time-frequency resource for carrying the first UCI via the third uplink control channel.
6 . The apparatus according to claim 2 ,
wherein the third uplink control channel is PUCCH Format 1, and
wherein Δ TF,b,f,c (i) is determined based on the quantity of bits of the first UCI and the quantity of bits of the second UCI.
7 . The apparatus according to claim 6 , wherein:
Δ
TF
,
b
,
f
,
c
(
i
)
=
1
0
log
l
0
(
N
r
e
f
PUCCH
N
s
y
m
b
PUCCH
(
i
)
)
+
Δ
UCI
(
i
)
,
N
symb
PUCCH
(
i
)
indicates a quantity of the symbols occupied by the third uplink control channel,
N
ref
PUCCH
indicates a quantity of symbols in one slot, and
Δ UCI (i)=10 log 10 (O UCI (i)), wherein O UCI (i) indicates a total quantity of bits of the first UCI and the second UCI.
8 . A power control method for an uplink control channel, the method comprising:
determining a first uplink control channel for carrying first uplink control information (UCI) and a second uplink control channel for carrying second UCI; and
based on a time domain resource of the first uplink control channel overlapping a time domain resource of the second uplink control channel, receiving the first UCI and the second UCI from a terminal over a third uplink control channel, wherein transmit power of the third uplink control channel is a first power,
wherein:
the first power is determined based on a quantity of bits of the first UCI and a size of a time-frequency resource for carrying the first UCI via the third uplink control channel and not based on a quantity of bits of the second UCI and a size of a time-frequency resource for carrying the second UCI via the third uplink control channel, wherein a priority of the first UCI is higher than a priority of the second UCI.
9 . The method according to claim 8 , wherein:
the first power is P PUCCH,b,f,c (i, q u , q d , l),
P
PUCCH
,
b
,
f
,
c
(
i
,
q
u
,
q
d
,
l
)
=
min
{
P
CMAX
,
f
,
c
(
i
)
,
P
O
_
PUCCH
,
b
,
f
,
c
(
q
u
)
+
10
log
10
(
2
μ
M
RB
,
b
,
f
,
c
PUCCH
(
i
)
)
+
PL
b
,
f
,
c
(
q
d
)
+
Δ
F
_
PUCCH
(
F
)
+
Δ
TF
,
b
,
f
,
c
(
i
)
+
g
b
,
f
,
c
(
i
)
}
,
P CMAX,f,c (i) indicates maximum power that can be sent by a terminal, and z=min(x,y) indicates that z is equal to a smaller value between x and y,
P O_PUCCH,b,f,c ( q u )= P O_NOMINAL_PUCCH +P O_UE_PUCCH ( q u ),
P O_NOMINAL_PUCCH is a value configured by higher layer signaling p0-nominal, wherein when p0-nominal is not configured, P O_NOMINAL_PUCCH is equal to zero,
P O_UE_PUCCH (q u ) and PL b,f,c (q d ) are determined based on spatial relation information of the third uplink control channel,
M
RB
,
b
,
f
,
c
PUCCH
(
i
)
is a quantity of resource blocks allocated for the third uplink control channel,
μ indicates a subcarrier spacing used by the third uplink control channel; and
Δ F_PUCCH (F) is a value semi-statically configured by using a higher-layer parameter.
10 . The method according to claim 9 ,
wherein the third uplink control channel is physical uplink control channel (PUCCH) Format 2, PUCCH Format 3, or PUCCH Format 4, and
wherein Δ TF,b,f,c (i) is determined based on the quantity of bits of the first UCI and the size of the time-frequency resource for carrying the first UCI via the third uplink control channel.
11 . The method according to claim 10 , wherein:
Δ TF,b,f,c (i)=10 log 10 (K 1 ·(n HARQ-ACK (i)+O SR (i)+O CSI (i)/N RE (i), wherein K 1 =6,
n HARQ-ACK (i) indicates a quantity of bits of an acknowledgement/negative acknowledgement (ACK/NACK) in the first UCI,
O SR (i) indicates a quantity of bits of a scheduling request (SR) in the first UCI,
O CSI (i) indicates a quantity of bits of channel state information (CSI) in the first UCI, and
N RE (i) indicates the size of the time-frequency resource for carrying the first UCI via the third uplink control channel.
12 . The method according to claim 10 , wherein:
Δ TF,b,f,c (i)=10 log 10 (2 K 2·BPRE(i) −1), wherein K 2 =2.4,
BPRE( i )=( O ACK ( i )+ O SR ( i )+ O CSI ( i )+ O CRC ( i ))/ N RE ( i ),
O ACK (i) indicates a quantity of bits of an acknowledgement/negative acknowledgement (ACK/NACK) in the first UCI,
O SR (i) indicates a quantity of bits of a scheduling request (SR) in the first UCI,
O CSI (i) indicates a quantity of bits of channel state information (CSI) in the first UCI,
O CRC (i) is a quantity of check bits of the first UCI, and
N RE (i) indicates the size of the time-frequency resource for carrying the first UCI via the third uplink control channel.
13 . The method according to claim 9 ,
wherein the third uplink control channel is physical uplink control channel (PUCCH) Format 1, and
wherein Δ TF,b,f,c (i) is determined based on the quantity of bits of the first UCI and the quantity of bits of the second UCI.
14 . The method according to claim 13 , wherein:
Δ
TF
,
b
,
f
,
c
(
i
)
=
1
0
log
l
0
(
N
r
e
f
PUCCH
N
s
y
m
b
PUCCH
(
i
)
)
+
Δ
UCI
(
i
)
,
N
symb
PUCCH
(
i
)
indicates a quantity of the symbols occupied by the third uplink control channel,
N
ref
PUCCH
indicates a quantity of symbols in one slot, and
Δ UCI (i)=10 log 10 (O UCI (i)), wherein O UCI (i) indicates a total quantity of bits of the first UCI and the second UCI.
15 . An apparatus, comprising:
at least one processor configured to:
determine a first uplink control channel for carrying first uplink control information (UCI) and a second uplink control channel for carrying second UCI; and
based on a time domain resource of the first uplink control channel overlapping a time domain resource of the second uplink control channel, receive the first UCI and the second UCI from a terminal over a third uplink control channel, wherein transmit power of the third uplink control channel is a first power,
wherein:
the first power is determined based on a quantity of bits of the first UCI and a size of a time-frequency resource for carrying the first UCI via the third uplink control channel and not based on a quantity of bits of the second UCI and a size of a time-frequency resource for carrying the second UCI via the third uplink control channel, wherein a priority of the first UCI is higher than a priority of the second UCI.
16 . The apparatus according to claim 15 , wherein:
the first power is P PUCCH,b,f,c (i, q u , q d , l),
P
PUCCH
,
b
,
f
,
c
(
i
,
q
u
,
q
d
,
l
)
=
min
{
P
CMAX
,
f
,
c
(
i
)
,
P
O
_
PUCCH
,
b
,
f
,
c
(
q
u
)
+
10
log
10
(
2
μ
M
RB
,
b
,
f
,
c
PUCCH
(
i
)
)
+
PL
b
,
f
,
c
(
q
d
)
+
Δ
F
_
PUCCH
(
F
)
+
Δ
TF
,
b
,
f
,
c
(
i
)
+
g
b
,
f
,
c
(
i
)
}
,
P CMAX,f,c (i) indicates maximum power that can be sent by a terminal, and z=min(x,y) indicates that z is equal to a smaller value between x and y,
P O_PUCCH,b,f,c ( q u )= P O_NOMINAL_PUCCH +P O_UE_PUCCH ( q u ),
P O_NOMINAL_PUCCH is a value configured by higher layer signaling p0-nominal, wherein when p0-nominal is not configured, P O_NOMINAL_PUCCH is equal to zero,
P O_UE_PUCCH (q u ) and PL b,f,c (q d ) are determined based on spatial relation information of the third uplink control channel,
M
RB
,
b
,
f
,
c
PUCCH
(
i
)
is a quantity of resource blocks allocated for the third uplink control channel,
μ indicates a subcarrier spacing used by the third uplink control channel; and
Δ F_PUCCH (F) is a value semi-statically configured by using a higher-layer parameter.
17 . The apparatus according to claim 16 ,
wherein the third uplink control channel is physical uplink control channel (PUCCH) Format 2, PUCCH Format 3, or PUCCH Format 4, and
wherein Δ TF,b,f,c (i) is determined based on the quantity of bits of the first UCI and the size of the time-frequency resource for carrying the first UCI via the third uplink control channel.
18 . The apparatus according to claim 17 , wherein:
Δ TF,b,f,c (i)=10 log 10 (K 1 ·(N HARQ-ACK (i)+O SR (i)+O CSI (i))/N RE (i)), wherein K 1 =6,
n HARQ-ACK (i) indicates a quantity of bits of an acknowledgement/negative acknowledgement (ACK/NACK) in the first UCI,
O SR (i) indicates a quantity of bits of a scheduling request (SR) in the first UCI,
O CSI (i) indicates a quantity of bits of channel state information (CSI) in the first UCI, and
N RE (i) indicates the size of the time-frequency resource for carrying the first UCI via the third uplink control channel.
19 . The apparatus according to claim 17 , wherein:
Δ TF,b,f,c (i)=10 log 10 (2 K 2 ·BPRE(i) −1), wherein K 2 =2.4,
BPRE( i )=( O ACK ( i )+ O SR ( i )+ O CSI ( i )+ O CRC ( i ))/ N RE ( i ),
O ACK (i) indicates a quantity of bits of an acknowledgement/negative acknowledgement (ACK/NACK) in the first UCI,
O SR (i) indicates a quantity of bits of a scheduling request (SR) in the first UCI,
O CSI (i) indicates a quantity of bits of channel state information (CSI) in the first UCI,
O CRC (i) is a quantity of check bits of the first UCI, and
N RE (i) indicates the size of the time-frequency resource for carrying the first UCI via the third uplink control channel.
20 . The apparatus according to claim 16 ,
wherein the third uplink control channel is physical uplink control channel (PUCCH) Format 1, and
wherein a Δ TF,b,f,c (i) is determined based on the quantity of bits of the first UCI and the quantity of bits of the second UCI.