Method for controlling power of uplink channel, user equipment and communication system
View Patent ↗Embodiments of the present disclosure provide a method for controlling power of an uplink channel, a UE and a communication system. The method for controlling power includes: a UE sorts priorities of uplink channels of at least two cells, when transmitting signals of the uplink channels containing uplink control information for the at least two cells within the same subframe; and allocates power for the uplink channels of the at least two cells according to a result of priority sorting; when allocating power for an uplink channel, needed power of one or more uplink channels with lower priorities than that of the uplink channel is taken into account. With the embodiments of the present disclosure, not only power may be allocated for uplink channels of high priorities, but also uplink channels of low priorities may be transmitted punctually, thereby further improving overall performance of uplink information transmission.
1. A method for controlling power of an uplink channel, applicable to a UE keeping in connection with at least two cells, the method comprising:
sorting, by the UE, priorities of uplink channels of the at least two cells, when transmitting signals of the uplink channels containing uplink control information for the at least two cells within the same subframe; and
allocating power for the uplink channels of the at least two cells according to a result of priority sorting; wherein when allocating power for an uplink channel, needed power of one or more uplink channels with lower priorities than that of the uplink channel is taken into account.
2. The method for controlling power according to claim 1 , wherein power P i allocated for an i-th uplink channel is obtained according to a formula below:
p
i
=
{
min
(
p
des
_
i
,
p
c
max
-
∑
j
=
2
…
M
p
min_
j
)
,
i
=
1
min
(
p
des
_
i
,
p
c
max
-
∑
k
=
1
…
i
-
1
p
k
-
∑
j
=
i
+
1
…
M
p
min_
j
)
,
i
=
2
,
…
,
M
-
1
max
(
p
c
max
-
∑
l
=
1
…
M
-
1
p
l
,
p
min_
i
)
,
i
=
M
}
;
where, 1, . . . , M are serial numbers of uplink channels with priorities being descendingly sorted, M is the number of the uplink channels of which priorities are sorted, P cmax is maximum uplink transmission power of the UE, P des _ i transmission power used by the UE for the i-th uplink channel that is expected by a base station, and P min _ j is needed power of a j-th uplink channel.
3. The method for controlling power according to claim 2 , wherein the maximum uplink transmission power of the UE and needed power of the uplink channels satisfy a condition as below:
P
c
max
≥
∑
i
=
1
,
…
,
M
p
min_
i
)
.
4. The method for controlling power according to claim 1 , wherein the needed power of the uplink channels is configured for different base stations.
5. The method for controlling power according to claim 4 , wherein the method further comprises:
taking power of one or more cells in each base station only into account when allocating transmission power for uplink channels of different base stations.
6. The method for controlling power according to claim 5 , wherein the power of one or more cells in the base station is determined according to the priorities of the cells in the base station.
7. The method for controlling power according to claim 1 , wherein the needed power of the uplink channels is configured for different cells.
8. The method for controlling power according to claim 7 , wherein the method further comprises: configuring different needed power for different cells under the same base station.
9. The method for controlling power according to claim 1 , wherein the needed power of the uplink channels is configured for different uplink channels.
10. The method for controlling power according to claim 9 , wherein different needed power is configured according to different types of the uplink channels, or different needed power is configured according to different contents carried by the uplink channels.
11. The method for controlling power according to claim 1 , wherein the method further comprise:
receiving, by the UE, high-layer configuration information transmitted by a base station, and configuring directly the needed power of the uplink channels according to the high-layer configuration information; or
determining needed power according to an interval provided by the high-layer configuration information, and configuring the needed power of the uplink channels according to the determined needed power.
12. The method for controlling power according to claim 1 , wherein the sorting priorities of uplink channels of the at least two cells comprises:
determining the priorities of the uplink channels according to a type of the uplink control information; or
determining the priorities of the uplink channels according to a type of the uplink control information and a type or an index of the at least two cells.
13. An apparatus for controlling power of an uplink channel, configured in a UE keeping in connection with at least two cells, the apparatus comprising:
a priority sorting unit configured to sort priorities of uplink channels of the at least two cells when transmitting signals of the uplink channels containing uplink control information for the at least two cells within the same subframe; and
a power allocating unit configured to allocate power for the uplink channels of the at least two cells according to a result of priority sorting;
wherein when allocating power for an uplink channel, needed power of one or more uplink channels with lower priorities than that of the uplink channel is taken into account.
14. The apparatus for controlling power according to claim 13 , wherein the power allocating unit is configured to perform power allocation by using a formula below, and wherein power P i allocated for an i-th uplink channel is:
p
i
=
{
min
(
p
des
_
i
,
p
c
max
-
∑
j
=
2
…
M
p
min_
j
)
,
i
=
1
min
(
p
des
_
i
,
p
c
max
-
∑
k
=
1
…
i
-
1
p
k
-
∑
j
=
i
+
1
…
M
p
min_
j
)
,
i
=
2
,
…
,
M
-
1
max
(
p
c
max
-
∑
l
=
1
…
M
-
1
p
l
,
p
min_
i
)
,
i
=
M
}
;
where, 1, . . . , M are serial numbers of uplink channels with priorities being descendingly sorted, M is the number of the uplink channels of which priorities are sorted, P cmax is maximum uplink transmission power of the UE, P des _ i transmission power used by the UE for the i-th uplink channel that is expected by a base station, and P min _ j is needed power of a j-th uplink channel.
15. The apparatus for controlling power according to claim 13 , wherein the maximum uplink transmission power of the UE and needed power of the uplink channels satisfy a condition as below:
P
c
max
≥
∑
i
=
1
,
…
,
M
p
min_
i
)
.
16. The apparatus for controlling power according to claim 13 , wherein the needed power of the uplink channels is configured for different base stations, or is configured for different cells, or is configured for different uplink channels.
17. The apparatus for controlling power according to claim 13 , wherein the apparatus further comprises:
a configuring unit configured to receive high-layer configuration information transmitted by a base station, and configure directly the needed power of the uplink channels according to the high-layer configuration information; or
determine needed power according to an interval provided by the high-layer configuration information, and configure the needed power of the uplink channels according to the determined needed power.
18. A communication system, comprising:
a UE keeping in connection with at least two cells and configured to sort priorities of uplink channels of the at least two cells when transmitting signals of the uplink channels containing uplink control information for the at least two cells within the same subframe, and allocate power for the uplink channels of the at least two cells according to a result of priority sorting;
wherein when allocating power for an uplink channel, needed power of one or more uplink channels with lower priorities than that of the uplink channel is taken into account.