System and method of uplink power control in a wireless communication system
View Patent ↗An apparatus may include a transceiver operable to receive a downlink message from a base station for a serving cell, the downlink message allocating a set of control parameters. The apparatus may also include a processor circuit communicatively coupled to the transceiver and an uplink power control module operable on the processor circuit to read the set of control parameters, and apply a signal-to-noise-and-interference (SINR) parameter based on the received set of control parameters to determine physical uplink shared channel (PUSCH) power to be applied for a PUSCH transmission. Other embodiments are disclosed and claimed.
1. An apparatus, comprising:
a transceiver operable to receive a downlink message from a base station for a serving cell, the downlink message allocating a set of control parameters;
a processor circuit communicatively coupled to the transceiver; and
an uplink power control module operable on the processor circuit to:
read the set of control parameters;
apply a signal-to-noise-and-interference (SINR) parameter based on the received set of control parameters to determine physical uplink shared channel (PUSCH) power to be applied for a PUSCH transmission, the SINR parameter determined from a received control parameter that denotes a minimum expected cell edge SINR value for the serving cell;
determine whether a physical uplink control channel (PUCCH) transmission is to accompany the PUSCH transmission; and
set the PUSCH power according to whether the PUCCH transmission is to accompany the PUSCH transmission.
2. The apparatus of claim 1 , the uplink power control module operable on the processor circuit to determine PUSCH power by applying full pathloss compensation.
3. The apparatus of claim 1 , the uplink power control module operable on the processor to determine the PUSCH power for a subframe i and serving cell c according to:
P
PUSCH
,
c
(
i
)
=
min
{
P
CMAX
,
c
(
i
)
,
10
log
10
(
M
PUSCH
,
c
(
i
)
)
+
P
O_PUSCH
,
c
(
j
)
+
PL
c
+
SINR
opt
,
c
(
j
)
+
Δ
TF
,
c
(
i
)
+
f
c
(
i
)
}
when no PUCCH transmission is to accompany the PUSCH transmission, where P PUSCH,c (i) represents the PUSCH power for the subframe i and the serving cell c, P CMAX,c (i) represents a configured user equipment (UE) transmit power for the subframe i and the serving cell c, M PUSCH,c (i) represents a bandwidth, in resource blocks, of a PUSCH resource assignment for the subframe i and the serving cell c, j represents a PUSCH transmission type, P o _ PUSCH,c (j) represents a power base value for the PUSCH transmission type j, PL c represents a downlink pathloss estimate for the serving cell c, SINR opt,c (j) represents the SINR parameter, Δ TF,c (i) represents an adjustment for a data rate for the subframe i and the serving cell c, and f c (i) represents a PUSCH power control adjustment state for the subframe i and the serving cell c.
4. The apparatus of claim 1 , the uplink power control module operable on the processor to determine the PUSCH power for a subframe i and serving cell c according to:
P
PUSCH
,
c
(
i
)
=
min
{
10
log
10
(
P
^
CMAX
,
c
(
i
)
-
P
^
PUCCH
(
i
)
)
,
10
log
10
(
M
PUSCH
,
c
(
i
)
)
+
P
O_PUSCH
,
c
(
j
)
+
PL
c
+
SINR
opt
,
c
(
j
)
+
Δ
TF
,
c
(
i
)
+
f
c
(
i
)
}
when PUCCH transmission is to accompany the PUSCH transmission, where P PUSCH,c (i) represents the PUSCH power for the subframe i and the serving cell c, {circumflex over (P)} CMAX,c (i) represents a linear value of a configured user equipment (UE) transmit power for the subframe i and the serving cell c, {circumflex over (P)} PUCCH (i) represents linear value of a PUCCH transmit power for the subframe i, P PUSCH,c (i) represents a bandwidth, in resource blocks, of a PUSCH resource assignment for the subframe i and the serving cell c, j represents a PUSCH transmission type, P o _ PUSCH,c (j) represents a power base value for the PUSCH transmission type j, PL c represents a downlink pathloss estimate for the serving cell c, SINR opt,c (j) represents the SINR parameter, Δ TF,c (i) represents an adjustment for a data rate for the subframe i and the serving cell c, and f c (i) represents a PUSCH power control adjustment state for the subframe i and the serving cell c.
5. The apparatus of claim 1 , the uplink power control module operable on the processor circuit to determine the SINR parameter according to:
SINR
opt
,
c
(
j
)
=
10
log
10
(
max
(
10
⋀
(
SINR
MIN
,
c
(
dB
)
10
)
,
α
c
(
j
)
·
CINR
DL
,
c
-
1
N
r
,
c
)
)
,
where SINR opt,c (j) represents the SINR parameter, c represents the serving cell, j represents a PUSCH transmission type, SINR MIN,c (dB) represents the received control parameter, α c (j) represents a fairness adjustment value for the serving cell c and the PUSCH transmission type j, CINR DL,c represents a downlink (DL) carrier-to-interference-and-noise ratio measured value for the serving cell c, and N r,c represents a number of receiving antennas of an evolved node B (eNB) of the serving cell c.
6. The apparatus of claim 1 , the uplink power control module operable on the processor circuit to determine the SINR parameter according to:
SINR
opt
,
c
(
j
)
=
{
max
(
SINR
MIN
,
c
(
dB
)
,
10
log
10
(
α
c
(
j
)
)
+
CINR
DL
,
c
(
dB
)
)
,
if
α
c
(
j
)
≠
0
SINR
MIN
,
c
(
dB
)
,
if
α
c
(
j
)
=
0
,
where SINR opt,c (j) represents the SINR parameter, c represents the serving cell, j represents a PUSCH transmission type, SINR MIN,c (dB) represents the received control parameter, α c (j) represents a fairness adjustment value for the serving cell c and the PUSCH transmission type j, and CINR DL,c (dB) represents a downlink (DL) carrier-to-interference-and-noise ratio for the serving cell c.
7. The apparatus of claim 3 , the uplink power control module operable on the processor circuit to determine P O _ PUSCH,c (j) according to:
P O _ PUSCH,c ( j )= P O _ NOMINAL _ PUSCH,c ( j )+ P O _ UE _ PUSCH,c ( j ),
where P O _ NOMINAL _ PUSCH,c (j) is a cell-specific parameter for the serving cell c and the PUSCH transmission type j and P O _ UE _ PUSCH,c (j) is a UE-specific parameter provided by radio resource control (RRC) signaling for the serving cell c and the PUSCH transmission type j.
8. The apparatus of claim 3 , the parameter P O _ NOMINAL _ PUSCH,c (j) set according to:
P O _ NOMINAL _ PUSCH,c ( j )=Quantization( NI ),
where NI represents an average power level of noise and interference per resource block and Quantization(NI) quantizes values of NI in 1 dBm increments in a range of −126 to 24 dBm.
9. The apparatus of claim 1 , comprising a touch screen display communicatively coupled to the processor circuit.
10. A method, comprising:
reading a set of control parameters sent in a downlink message from a serving cell;
determining a signal-to-noise-and-interference ratio (SINR) parameter from a control parameter denoting a minimum expected cell edge SINR value for the serving cell, the control parameter comprised among the set of control parameters;
applying the SINR parameter based on the set of control parameters to determine physical uplink shared channel (PUSCH) power to be applied for a PUSCH transmission;
determining whether a physical uplink control channel (PUCCH) transmission is to accompany the PUSCH transmission; and
setting the PUSCH power according to whether the PUCCH transmission is to accompany the PUSCH transmission.
11. The method of claim 10 , comprising:
determining that no PUCCH transmission is to accompany the PUSCH transmission; and
applying full pathloss compensation to determine the PUSCH power for a subframe i and serving cell c according to according to:
P
PUSCH
,
c
(
i
)
=
min
{
P
CMAX
,
c
(
i
)
,
10
log
10
(
M
PUSCH
,
c
(
i
)
)
+
P
O_PUSCH
,
c
(
j
)
+
PL
c
+
SINR
opt
,
c
(
j
)
+
Δ
TF
,
c
(
i
)
+
f
c
(
i
)
}
.
where P PUSCH,c (i) represents the PUSCH power for the subframe i and the serving cell c, P CMAX,c (i) represents a configured user equipment (UE) transmit power for the subframe i and the serving cell c, M PUSCH,c (i) represents a bandwidth, in resource blocks, of a PUSCH resource assignment for the subframe i and the serving cell c, j represents a PUSCH transmission type, P O _ PUSCH,c (j) represents a power base value for the PUSCH transmission type j, PL c represents a downlink pathloss estimate for the serving cell c, SINR opt,c (j) represents the SINR parameter, Δ TF,c (i) represents an adjustment for a data rate for the subframe i and the serving cell c, and f c (i) represents a PUSCH power control adjustment state for the subframe i and the serving cell c.
12. The method of claim 10 , comprising determining the SINR parameter according to:
SINR
opt
,
c
(
j
)
=
10
log
10
(
max
(
10
⋀
(
SINR
MIN
,
c
(
dB
)
10
)
,
α
c
(
j
)
·
CINR
DL
,
c
-
1
N
r
,
c
)
)
,
where SINR opt,c (j) represents the SINR parameter, c represents the serving cell, j represents a PUSCH transmission type, SINR MIN,c (dB) represents the control parameter, α c (j) represents a fairness adjustment value for the serving cell and the PUSCH transmission type j, CINR DL,c represents a downlink (DL) carrier-to-interference-and-noise ratio measured value for the serving cell c, and N r,c represents a number of receiving antennas of an evolved node B (eNB) of the serving cell c.
13. The method of claim 10 , comprising determining the SINR parameter according to:
SINR
opt
,
c
(
j
)
=
{
max
(
SINR
MIN
,
c
(
dB
)
,
10
log
10
(
α
c
(
j
)
)
+
CINR
DL
,
c
(
dB
)
)
,
if
α
c
(
j
)
≠
0
SINR
MIN
,
c
(
dB
)
,
if
α
c
(
j
)
=
0
,
where SINR opt,c (j) represents the SINR parameter, c represents the serving cell, j represents a PUSCH transmission type, SINR MIN,c (dB) represents the control parameter, α c (j) represents a fairness adjustment value for the serving cell c and the PUSCH transmission type j, and CINR DL,c (dB) represents a downlink (DL) carrier-to-interference-and-noise ratio for the serving cell c.
14. The method of claim 11 comprising determining P O _ PUSCH,c (j) according to:
P O _ PUSCH,c ( j )= P O _ NOMINAL PUSCH,c ( j )+ P O _ UE PUSCH,c ( j ),
where P O _ NOMINAL PUSCH,c (j) is a cell-specific parameter for the serving cell c and the PUSCH transmission type j and P O _ UE PUSCH,c (j) is a UE-specific parameter provided by radio resource control (RRC) signaling for the serving cell c and the PUSCH transmission type j.
15. At least one non-transitory computer-readable storage medium comprising a plurality of instructions that, when executed, cause a system to:
receive a set of control parameters;
determine a signal-to-noise-and-interference ratio (SINR) parameter from a received control parameter denoting a minimum expected cell edge SINR value for the serving cell, the received control parameter comprised among the received set of control parameters;
apply the SINR parameter based on the received set of control parameters to determine physical uplink shared channel (PUSCH) power to be applied for a PUSCH transmission;
determine whether a physical uplink control channel (PUCCH) transmission is to accompany the PUSCH transmission; and
set the PUSCH power according to whether the PUCCH transmission is to accompany the PUSCH transmission.
16. The at least one non-transitory computer-readable storage medium of claim 15 comprising instructions that, when executed, cause a system to determine PUSCH power by applying full pathloss compensation.
17. The at least one non-transitory computer-readable storage medium of claim 15 comprising instructions that, when executed, cause a system to determine the PUSCH power for a subframe i and serving cell c according to:
P
PUSCH
,
c
(
i
)
=
min
{
P
CMAX
,
c
(
i
)
,
10
log
10
(
M
PUSCH
,
c
(
i
)
)
+
P
O_PUSCH
,
c
(
j
)
+
PL
c
+
SINR
opt
,
c
(
j
)
+
Δ
TF
,
c
(
i
)
+
f
c
(
i
)
}
when no PUCCH transmission is to accompany the PUSCH transmission, where P PUSCH,c (i) represents the PUSCH power for the subframe i and the serving cell c, P CMAX,c (i) represents a configured user equipment (UE) transmit power for the subframe i and the serving cell c, M PUSCH,c (i) represents a bandwidth, in resource blocks, of a PUSCH resource assignment for the subframe i and the serving cell c, j represents a PUSCH transmission type, P O _ PUSCH,c (j) represents a power base value for the PUSCH transmission type j, PL c represents a downlink pathloss estimate for the serving cell c, SINR opt,c (j) represents the SINR parameter, Δ TF,c (i) represents an adjustment for a data rate for the subframe i and the serving cell c, and f c (i) represents a PUSCH power control adjustment state for the subframe i and the serving cell c.
18. The at least one non-transitory computer-readable storage medium of claim 15 comprising instructions that, when executed, cause a system to determine the PUSCH power for a subframe i and serving cell c according to:
P
PUSCH
,
c
(
i
)
=
min
{
10
log
10
(
P
^
CMAX
,
c
(
i
)
-
P
^
PUCCH
(
i
)
)
,
10
log
10
(
M
PUSCH
,
c
(
i
)
)
+
P
O_PUSCH
,
c
(
j
)
+
PL
c
+
SINR
opt
,
c
(
j
)
+
Δ
TF
,
c
(
i
)
+
f
c
(
i
)
}
when PUCCH transmission is to accompany the PUSCH transmission, where P PUSCH,c (i) represents the PUSCH power for the subframe i and the serving cell c, {circumflex over (P)} CMAX,c (i) represents a linear value of a configured user equipment (UE) transmit power for the subframe i and the serving cell c, {circumflex over (P)} PUCCH (i) represents linear value of a PUCCH transmit power for the subframe i, M PUSCH,c (i) represents a bandwidth, in resource blocks, of a PUSCH resource assignment for the subframe i and the serving cell c, j represents a PUSCH transmission type, P C _ PUSCH,c (i) represents a power base value for the PUSCH transmission type j, PL c represents a downlink pathloss estimate for the serving cell c, SINR opt,c (j) represents the SINR parameter, Δ TF,c (i) represents an adjustment for a data rate for the subframe i and the serving cell c, and f c (i) represents a PUSCH power control adjustment state for the subframe i and the serving cell c.
19. The at least one non-transitory computer-readable storage medium of claim 18 comprising instructions that, when executed, cause a system to determine the SINR parameter according to:
SINR
opt
,
c
(
j
)
=
10
log
10
(
max
(
10
⋀
(
SINR
MIN
,
c
(
dB
)
10
)
,
α
c
(
j
)
·
CINR
DL
,
c
-
1
N
r
,
c
)
)
,
where SINR opt,c (j) represents the SINR parameter, c represents the serving cell, j represents a PUSCH transmission type, SINR MIN,c (dB) represents the received control parameter, α c (j) represents a fairness adjustment value for the serving cell c and the PUSCH transmission type j, CINR DL,c represents a downlink (DL) carrier-to-interference-and-noise ratio measured value for the serving cell c, and N r,c represents a number of receiving antennas of an evolved node B (eNB) of the serving cell c.
20. The at least one non-transitory computer-readable storage medium of claim 18 comprising instructions that, when executed, cause a system to determine the SINR parameter according to:
SINR
opt
,
c
(
j
)
=
{
max
(
SINR
MIN
,
c
(
dB
)
,
10
log
10
(
α
c
(
j
)
)
+
CINR
DL
,
c
(
dB
)
)
,
if
α
c
(
j
)
≠
0
SINR
MIN
,
c
(
dB
)
,
if
α
c
(
j
)
=
0
,
where SINR opt,c (j) represents the SINR parameter, c represents the serving cell, j represents a PUSCH transmission type, SINR MIN,c (dB) represents the received control parameter, α c (j) represents a fairness adjustment value for the serving cell c and the PUSCH transmission type j, and CINR DL,c (dB) represents a downlink (DL) carrier-to-interference-and-noise ratio for the serving cell c.
21. The at least one non-transitory computer-readable storage medium of claim 15 comprising instructions that, when executed, cause a system to determine P O _ PUSCH,c (j) according to:
P O _ PUSCH,c ( j )= P O _ NOMINAL _ PUSCH,c ( j )+ P O _ UE _ PUSCH,c ( j ),
where P O _ NOMINAL _ PUSCH,c (j) is a cell-specific parameter for the serving cell c and the PUSCH transmission type j and P O _ UE _ PUSCH,c (j) is a UE-specific parameter provided by radio resource control (RRC) signaling for the serving cell c and the PUSCH transmission type j.
22. The at least one non-transitory computer-readable storage medium of claim 21 , the parameter P O _ NOMINAL _ PUSCH,c (j) set according to:
P O _ NOMINAL _ PUSCH,c ( j )=Quantization( NI ),
where NI represents an average power level of noise and interference per resource block and Quantization (NI) quantizes values of NI in 1 dBm increments in a range of −126 to 24 dBm.