3GPP UMTS Long Term Evolution
Uplink
p ppower control in LTE
August 2009
Andreas Roessler
Andreas.Roessler@rohde-schwarz.com
Technology Manager North America
Rohde & Schwarz, Germany
Di l i
Disclaimer
This presentation contains forward looking statements and milestones. Such statements are based on our current
expectations and are subject to certain risks and uncertainties that could negatively affect our delivery roadmap.
1
Uplink power control
What's behind?
Power control
sufficient Ebit/N0 to
achieve required QoS
uplink interference,
maximize battery life
l
Characteristic of radio channel with multipath propagation (path loss,
shadowing, fast fading) as well as the interference “provided” through other
users – both within the same cell and from neighboring cells – needs to be
considered to find the balance
balance,
August ‘09 | UL power control in LTE | 2
2
Some comments on UL power control in LTE
…or in other words what is different to 3G (UTRA FDD = WCDMA)?
l
SC-FDMA is the UL transmission scheme, so transmission of
different UE’s in the same radio cell is (almost) orthogonal by
nature, means intra-cell interference is less critical than in WCDMA,
– IIn WCDMA d
data rate iis iincreased
db
by llowering
i the
h spreading
di ffactor iincreasing
i the
h
transmission power Æ increase of intra-cell interference,
– In LTE data rate is increased by varying the allocated bandwidth and the
Modulation Coding Scheme (MCS), where the power can remain typically the same
for a given MCS,
MCS but…,
but
l
WCDMA uses periodic power control (0.667ms) normally with a
step size of ±1 dB (“fast power control”), where LTE allows larger
power steps,
t
but
b t nott necessarily
il periodically,
i di ll
– LTE uses a combination of open-loop and close-loop for UL power control, as this
is more affordable and requires less feedback (signaling overhead) than WCDMA,
– Open-loop is used to set a coarse operating point, where close-loop will be used for
fi ttuning
fine
i tto control
t l iinterference
t f
and
d match
t h channel
h
l conditions,
diti
August ‘09 | UL power control in LTE | 3
3
What is power controlled in the uplink?
Physical channels and signals in the uplink
Path loss
Multipath propagation
UL interference
Physical Uplink
Control Channel (PUCCH)
(Demodulation Reference Signal,
occupied time slot position depends
Physical Uplink
Shared Channel (PUSCH)
(Demodulation Reference Signal,
over entire bandwidth in time slots #3 and #10)
Sounding Reference Signals (SRS)
[optional]
August ‘09 | UL power control in LTE | 4
4
Physical channels and signals in the uplink
PUSCH, PUCCH, DMRS, SRS in the time-frequency domain
Demodulation Reference
Signals (DMRS)
for PUSCH and PUCCH
1 subframe (1 ms) = 2 Time Slots
Æ 7 SC-FDMA symbols
(normal cyclic prefix)
Slot #0
Time
Slot #1
Physical Uplink
Shared Channel
(PUSCH)
Physical Uplink Control Channel (PUCCH)
issued by UE3 and UE4
Slot #2
Slot #3
Sounding
Reference
Signals (SRS)
issued by UE1 and UE2
used by UE1 and UE2
Frequency
e.g. 50 RB = 10 MHz
channel bandwidth
Screenshot taken from R&S® SMU200A Vector Signal Generator
August ‘09 | UL power control in LTE | 5
5
PUSCH power control
Physical Uplink Shared Channel
l
Power level [dBm] of PUSCH is calculated every subframe i based on the
following formula out of TS 36.213 V8.7.0 (June ’09 baseline),
1)
+23 dBm is maximum allowed power in LTE according to TS 36.101, corresponding to power class 3bis in WCDMA
August ‘09 | UL power control in LTE | 6
6
PUSCH power control
Physical Uplink Shared Channel
l
Power level [dBm] of PUSCH is calculated every subframe i based on the
following formula out of TS 36.213 V8.7.0 (June ’09 baseline),
Transmit power for PUSCH
in subframe i in dBm
1)
+23 dBm is maximum allowed power in LTE according to TS 36.101, corresponding to power class 3bis in WCDMA
August ‘09 | UL power control in LTE | 7
7
PUSCH power control
Physical Uplink Shared Channel
l
Power level [dBm] of PUSCH is calculated every subframe i based on the
following formula out of TS 36.213 V8.7.0 (June ’09 baseline),
Maximum allowed UE power
in this particular cell,
but at maximum +23 dBm1)
Transmit power for PUSCH
in subframe i in dBm
1)
+23 dBm is maximum allowed power in LTE according to TS 36.101, corresponding to power class 3bis in WCDMA
August ‘09 | UL power control in LTE | 8
8
PUSCH power control
Physical Uplink Shared Channel
l
Power level [dBm] of PUSCH is calculated every subframe i based on the
following formula out of TS 36.213 V8.7.0 (June ’09 baseline),
Maximum allowed UE power
in this particular cell,
but at maximum +23 dBm1)
Number of allocated
resource blocks (RB)
Transmit power for PUSCH
in subframe i in dBm
1)
+23 dBm is maximum allowed power in LTE according to TS 36.101, corresponding to power class 3bis in WCDMA
August ‘09 | UL power control in LTE | 9
9
PUSCH power control
Physical Uplink Shared Channel
l
Power level [dBm] of PUSCH is calculated every subframe i based on the
following formula out of TS 36.213 V8.7.0 (June ’09 baseline),
Maximum allowed UE power
in this particular cell,
but at maximum +23 dBm1)
Combination of cell- and UE-specific
components configured by L3
Number of allocated
resource blocks (RB)
Transmit power for PUSCH
in subframe i in dBm
1)
+23 dBm is maximum allowed power in LTE according to TS 36.101, corresponding to power class 3bis in WCDMA
August ‘09 | UL power control in LTE | 10
10
PUSCH power control
Physical Uplink Shared Channel
l
Power level [dBm] of PUSCH is calculated every subframe i based on the
following formula out of TS 36.213 V8.7.0 (June ’09 baseline),
Maximum allowed UE power
in this particular cell,
but at maximum +23 dBm1)
Combination of cell- and UE-specific
components configured by L3
Number of allocated
resource blocks (RB)
Transmit power for PUSCH
in subframe i in dBm
1)
Cell-specific
parameter
configured by L3
+23 dBm is maximum allowed power in LTE according to TS 36.101, corresponding to power class 3bis in WCDMA
August ‘09 | UL power control in LTE | 11
11
PUSCH power control
Physical Uplink Shared Channel
l
Power level [dBm] of PUSCH is calculated every subframe i based on the
following formula out of TS 36.213 V8.7.0 (June ’09 baseline),
Maximum allowed UE power
in this particular cell,
but at maximum +23 dBm1)
Combination of cell- and UE-specific
components configured by L3
Number of allocated
resource blocks (RB)
Transmit power for PUSCH
in subframe i in dBm
1)
Cell-specific
parameter
configured by L3
Downlink
path loss
estimate
+23 dBm is maximum allowed power in LTE according to TS 36.101, corresponding to power class 3bis in WCDMA
August ‘09 | UL power control in LTE | 12
12
PUSCH power control
Physical Uplink Shared Channel
l
Power level [dBm] of PUSCH is calculated every subframe i based on the
following formula out of TS 36.213 V8.7.0 (June ’09 baseline),
Maximum allowed UE power
in this particular cell,
but at maximum +23 dBm1)
Combination of cell- and UE-specific
components configured by L3
Number of allocated
resource blocks (RB)
Transmit power for PUSCH
in subframe i in dBm
1)
Cell-specific
parameter
configured by L3
PUSCH transport
format
Downlink
path loss
estimate
+23 dBm is maximum allowed power in LTE according to TS 36.101, corresponding to power class 3bis in WCDMA
August ‘09 | UL power control in LTE | 13
13
PUSCH power control
Physical Uplink Shared Channel
l
Power level [dBm] of PUSCH is calculated every subframe i based on the
following formula out of TS 36.213 V8.7.0 (June ’09 baseline),
Maximum allowed UE power
in this particular cell,
but at maximum +23 dBm1)
Combination of cell- and UE-specific
components configured by L3
Number of allocated
resource blocks (RB)
Transmit power for PUSCH
in subframe i in dBm
1)
Cell-specific
parameter
configured by L3
PUSCH transport
format
Downlink
path loss
estimate
Power control
adjustment derived
from TPC command
received in subframe (i-4)
+23 dBm is maximum allowed power in LTE according to TS 36.101, corresponding to power class 3bis in WCDMA
August ‘09 | UL power control in LTE | 14
14
PUSCH power control
Physical Uplink Shared Channel
l
Power level [dBm] of PUSCH is calculated every subframe i based on the
following formula out of TS 36.213 V8.7.0 (June ’09 baseline),
Maximum allowed UE power
in this particular cell,
but at maximum +23 dBm1)
Combination of cell- and UE-specific
components configured by L3
Number of allocated
resource blocks (RB)
Transmit power for PUSCH
in subframe i in dBm
Cell-specific
parameter
configured by L3
PUSCH transport
format
Downlink
path loss
estimate
Power control
adjustment derived
from TPC command
received in subframe (i-4)
Bandwidth factor
1)
+23 dBm is maximum allowed power in LTE according to TS 36.101, corresponding to power class 3bis in WCDMA
August ‘09 | UL power control in LTE | 15
15
PUSCH power control
Physical Uplink Shared Channel
l
Power level [dBm] of PUSCH is calculated every subframe i based on the
following formula out of TS 36.213 V8.7.0 (June ’09 baseline),
Maximum allowed UE power
in this particular cell,
but at maximum +23 dBm1)
Combination of cell- and UE-specific
components configured by L3
Number of allocated
resource blocks (RB)
Transmit power for PUSCH
in subframe i in dBm
Bandwidth factor
1)
Cell-specific
parameter
configured by L3
PUSCH transport
format
Downlink
path loss
estimate
Power control
adjustment derived
from TPC command
received in subframe (i-4)
Basic open-loop starting point
+23 dBm is maximum allowed power in LTE according to TS 36.101, corresponding to power class 3bis in WCDMA
August ‘09 | UL power control in LTE | 16
16
PUSCH power control
Physical Uplink Shared Channel
l
Power level [dBm] of PUSCH is calculated every subframe i based on the
following formula out of TS 36.213 V8.7.0 (June ’09 baseline),
Maximum allowed UE power
in this particular cell,
but at maximum +23 dBm1)
Combination of cell- and UE-specific
components configured by L3
Number of allocated
resource blocks (RB)
Transmit power for PUSCH
in subframe i in dBm
Bandwidth factor
1)
Cell-specific
parameter
configured by L3
PUSCH transport
format
Downlink
path loss
estimate
Power control
adjustment derived
from TPC command
received in subframe (i-4)
Basic open-loop starting point Dynamic offset (closed loop)
+23 dBm is maximum allowed power in LTE according to TS 36.101, corresponding to power class 3bis in WCDMA
August ‘09 | UL power control in LTE | 17
17
PUSCH power control
PCMAX
l
PCMAX=min{PEMAX; PUMAX}
l
PEMAX is the maximum allowed
power for this particular radio cell
configured by higher layers and
corresponds to P-MAX information
element (IE) provided in SIB Type 1,
l
PUMAX is the maximum UE power, defined as +23 dBm ± 2dB corresponding
to power class 3bis in WCDMA
WCDMA,
– Based on higher order modulation schemes and used transmission bandwidth a
Maximum Power Reduction (MPR) is applied and the UE maximum transmission
power is further reduced (see TS 36.101, table 6.2.3-1),
– Network signaling (NS_0x)
(NS 0x) might be used in a cell to further reduce maximum UE
transmission power (= Additional MPR (A-MPR); see TS 36.101, Table 6.2.4-1)
August ‘09 | UL power control in LTE | 18
18
PUSCH power control
MPUSCH
l
Power calculation depends also on allocated resource blocks for
uplink data transmission,
l
l
Number of RB depends on configured bandwidth, but further not each
number
b off RB iis a suitable
it bl allocation,
ll
ti
DCI format 0 and resource allocation type 2 is used to allocated resource
blocks to the UE
– Resource allocation type 2 means in general allocation of contiguously RB,
– Resource Indication Value (RIV) is signaled to the UE, calculated as follows:
UL
( LCRBs − 1) ≤ ⎣N RB
/ 2⎦
then
UL
RIV = N RB
( LCRBs − 1) + RBSTART
else
UL
UL
UL
RIV = N RB
( N RB
− LCRBs + 1) + ( N RB
− 1 − RBSTART )
PUSCH
UL
M RB
= 2α 2 ⋅ 3α 3 ⋅ 5α 5 ≤ N RB
– where α2, α3 and α5 are any integer value,
August ‘09 | UL power control in LTE | 19
19
PUSCH power control
MPUSCH
l
Power calculation depends also on allocated resource blocks for
uplink data transmission,
l
l
Number of RB depends on configured bandwidth, but further not each
number
b off RB iis a suitable
it bl allocation,
ll
ti
DCI format 0 and resource allocation type 2 is used to allocated resource
blocks to the UE
– Resource allocation type 2 means in general allocation of contiguously RB,
– Resource Indication Value (RIV) is signaled to the UE, calculated as follows:
# of allocated RB,
e.g. 27 RB,…
UL
( LCRBs − 1) ≤ ⎣N RB
/ 2⎦
then
UL
RIV = N RB
( LCRBs − 1) + RBSTART
else
UL
UL
UL
RIV = N RB
( N RB
− LCRBs + 1) + ( N RB
− 1 − RBSTART )
PUSCH
UL
M RB
= 2α 2 ⋅ 3α 3 ⋅ 5α 5 ≤ N RB
– where α2, α3 and α5 are any integer value,
August ‘09 | UL power control in LTE | 20
20
PUSCH power control
MPUSCH
l
Power calculation depends also on allocated resource blocks for
uplink data transmission,
l
l
Number of RB depends on configured bandwidth, but further not each
number
b off RB iis a suitable
it bl allocation,
ll
ti
DCI format 0 and resource allocation type 2 is used to allocated resource
blocks to the UE
– Resource allocation type 2 means in general allocation of contiguously RB,
– Resource Indication Value (RIV) is signaled to the UE, calculated as follows:
( LCRBs − 1) ≤ ⎣N
# of allocated RB,
e.g. 27 RB,…
UL
RB
/ 2⎦
Bandwidth,
e.g. 10 MHz = 50 RB
UL
RIV = N RB
( LCRBs − 1) + RBSTART
then
Offset in # of RB, e.g. 15 RB
else
UL
UL
UL
RIV = N RB
( N RB
− LCRBs + 1) + ( N RB
− 1 − RBSTART )
PUSCH
UL
M RB
= 2α 2 ⋅ 3α 3 ⋅ 5α 5 ≤ N RB
– where α2, α3 and α5 are any integer value,
August ‘09 | UL power control in LTE | 21
21
PUSCH power control
MPUSCH
l
Power calculation depends also on allocated resource blocks for
uplink data transmission,
l
l
Number of RB depends on configured bandwidth, but further not each
number
b off RB iis a suitable
it bl allocation,
ll
ti
DCI format 0 and resource allocation type 2 is used to allocated resource
blocks to the UE
– Resource allocation type 2 means in general allocation of contiguously RB,
– Resource Indication Value (RIV) is signaled to the UE, calculated as follows:
( LCRBs − 1) ≤ ⎣N
# of allocated RB,
e.g. 27 RB,…
UL
RB
/ 2⎦
Bandwidth,
e.g. 10 MHz = 50 RB
UL
RIV = N RB
( LCRBs − 1) + RBSTART
then
Offset in # of RB, e.g. 15 RB
else
UL
UL
UL
RIV = N RB
( N RB
− LCRBs + 1) + ( N RB
− 1 − RBSTART )
…must fulfill this requirement!
PUSCH
UL
M RB
= 2α 2 ⋅ 3α 3 ⋅ 5α 5 ≤ N RB
– where α2, α3 and α5 are any integer value,
August ‘09 | UL power control in LTE | 22
22
PUSCH power control
P0_PUSCH(j)
l
P0_PUSCH(j) is a combination of cell- and UE-specific components,
configured by higher layers1):
l
P0_PUSCH(j) = P0_NOMINAL_PUSCH(j) + P0_UE_PUSCH(j),
1)
Ö j = {0, 1},
see next slide(s) respectively TS 36.331 V8.6.0 Radio Resource Control specification
August ‘09 | UL power control in LTE | 23
23
PUSCH power control
P0_PUSCH(j)
l
P0_PUSCH(j) is a combination of cell- and UE-specific components,
configured by higher layers1):
l
P0_PUSCH(j) = P0_NOMINAL_PUSCH(j) + P0_UE_PUSCH(j),
Ö j = {0, 1},
– P0_NOMINAL_PUSCH(j) in the range of -126…+24 dBm is used to have different BLER
operating points to achieve lower probability of retransmissions,
1)
see next slide(s) respectively TS 36.331 V8.6.0 Radio Resource Control specification
August ‘09 | UL power control in LTE | 24
24
PUSCH power control
P0_PUSCH(j)
l
P0_PUSCH(j) is a combination of cell- and UE-specific components,
Full path loss compensation is considered…
configured by higher layers1):
.
l
P0_PUSCH(j) = P0_NOMINAL_PUSCH(j) + P0_UE_PUSCH(j),
Ö j = {0, 1},
– P0_NOMINAL_PUSCH(j) in the range of -126…+24 dBm is used to have different BLER
operating points to achieve lower probability of retransmissions,
1)
see next slide(s) respectively TS 36.331 V8.6.0 Radio Resource Control specification
August ‘09 | UL power control in LTE | 25
25
PUSCH power control
P0_PUSCH(j)
l
P0_PUSCH(j) is a combination of cell- and UE-specific components,
Full path loss compensation is considered…
configured by higher layers1):
…no path loss compensation is used.
l
P0_PUSCH(j) = P0_NOMINAL_PUSCH(j) + P0_UE_PUSCH(j),
Ö j = {0, 1},
– P0_NOMINAL_PUSCH(j) in the range of -126…+24 dBm is used to have different BLER
operating points to achieve lower probability of retransmissions,
1)
see next slide(s) respectively TS 36.331 V8.6.0 Radio Resource Control specification
August ‘09 | UL power control in LTE | 26
26
PUSCH power control
P0_PUSCH(j)
l
P0_PUSCH(j) is a combination of cell- and UE-specific components,
Full path loss compensation is considered…
configured by higher layers1):
…no path loss compensation is used.
l
P0_PUSCH(j) = P0_NOMINAL_PUSCH(j) + P0_UE_PUSCH(j),
Ö j = {0, 1},
– P0_NOMINAL_PUSCH(j) in the range of -126…+24 dBm is used to have different BLER
operating points to achieve lower probability of retransmissions,
– P0_UE_PUSCH(j) in the range of -8…7 dB is used by the eNB to compensate
systematic offsets in the UE’s transmission power settings arising from a wrongly
estimated path loss
loss,
1)
see next slide(s) respectively TS 36.331 V8.6.0 Radio Resource Control specification
August ‘09 | UL power control in LTE | 27
27
PUSCH power control
P0_PUSCH(j)
l
P0_PUSCH(j) is a combination of cell- and UE-specific components,
Full path loss compensation is considered…
configured by higher layers1):
…no path loss compensation is used.
l
P0_PUSCH(j) = P0_NOMINAL_PUSCH(j) + P0_UE_PUSCH(j),
Ö j = {0, 1},
– P0_NOMINAL_PUSCH(j) in the range of -126…+24 dBm is used to have different BLER
operating points to achieve lower probability of retransmissions,
– P0_UE_PUSCH(j) in the range of -8…7 dB is used by the eNB to compensate
systematic offsets in the UE’s transmission power settings arising from a wrongly
estimated path loss
loss,
l
j = 0 Ö for semi-persistent scheduling (SPS), j = 1 Ö for dynamic scheduling,
1)
see next slide(s) respectively TS 36.331 V8.6.0 Radio Resource Control specification
August ‘09 | UL power control in LTE | 28
28
PUSCH power control
P0_PUSCH(j)
l
P0_PUSCH(j) is a combination of cell- and UE-specific components,
Full path loss compensation is considered…
configured by higher layers1):
…no path loss compensation is used.
l
P0_PUSCH(j) = P0_NOMINAL_PUSCH(j) + P0_UE_PUSCH(j),
Ö j = {0, 1},
– P0_NOMINAL_PUSCH(j) in the range of -126…+24 dBm is used to have different BLER
operating points to achieve lower probability of retransmissions,
– P0_UE_PUSCH(j) in the range of -8…7 dB is used by the eNB to compensate
systematic offsets in the UE’s transmission power settings arising from a wrongly
estimated path loss
loss,
l
l
j = 0 Ö for semi-persistent scheduling (SPS), j = 1 Ö for dynamic scheduling,
j = 2 Ö for transmissions corresponding to the retransmission of the random
access response,
– F
For j = 2:
2 P0_UE_PUSCH(2) = 0 and
d P0_NOMINAL_PUSCH(2) = P0_PRE + ∆PREAMBLE_Msg3,
where P0_PRE and ∆PREAMBLE_Msg3 are provided by higher layers,
1)
see next slide(s) respectively TS 36.331 V8.6.0 Radio Resource Control specification
August ‘09 | UL power control in LTE | 29
29
PUSCH power control
P0_PUSCH(j)
l
P0_PUSCH(j) is a combination of cell- and UE-specific components,
Full path loss compensation is considered…
configured by higher layers1):
…no path loss compensation is used.
l
P0_PUSCH(j) = P0_NOMINAL_PUSCH(j) + P0_UE_PUSCH(j),
Ö j = {0, 1},
– P0_NOMINAL_PUSCH(j) in the range of -126…+24 dBm is used to have different BLER
operating points to achieve lower probability of retransmissions,
– P0_UE_PUSCH(j) in the range of -8…7 dB is used by the eNB to compensate
systematic offsets in the UE’s transmission power settings arising from a wrongly
estimated path loss
loss,
l
l
j = 0 Ö for semi-persistent scheduling (SPS), j = 1 Ö for dynamic scheduling,
j = 2 Ö for transmissions corresponding to the retransmission of the random
access response,
– F
For j = 2:
2 P0_UE_PUSCH(2) = 0 and
d P0_NOMINAL_PUSCH(2) = P0_PRE + ∆PREAMBLE_Msg3,
where P0_PRE and ∆PREAMBLE_Msg3 are provided by higher layers,
– P0_PRE is understood as Preamble Initial Received Target Power provided by higher layers
and is in the range of -120…-90 dBm,
– ∆PREAMBLE_Msg3
PREAMBLE Msg3 is in the range of -1…6, where the signaled integer value is multiplied by 2 and
is than the actual power value in dB,
1)
see next slide(s) respectively TS 36.331 V8.6.0 Radio Resource Control specification
August ‘09 | UL power control in LTE | 30
30
PUSCH power control
P0_PUSCH(j)
l
UplinkPowerControl IE contains the required information about
P0_Nominal_PUSCH, P0_UE_PUSCH, ∆PREAMBLE_Msg3 are part of
RadioResourceConfigCommon,
l
Via RadioResourceConfigCommon the terminal gets also access to RACHConfigCommon to extract from there information like Preamble Initial
Received Target Power (P0_PRE),
l
RadioResourceConfigCommon IE is part of System Information Block Type 2
(SIB Type 2),
– System information (SI) in LTE are organized in System Information Blocks and are
grouped in SI Messages when they do have same periodicity,
– In contrast to WCDMA SI are not signaled on a dedicated channel, instead the
shared channel transmission principle is used and they are transmitted on PDSCH,
– SIB Type contains at all information about shared and common channels and is
therefore part of each SI message and listed as first entry
entry,
August ‘09 | UL power control in LTE | 31
31
PUSCH power control
α(j) and PL
l
Path loss (PL) is estimated by measuring the power level (Reference Signal
Receive Power, RSRP) of the cell-specific downlink reference signals
(DLRS) and subtracting the measured value from the transmit power level of
the DLRS provided by higher layers
layers,
– SIB Type 2 Ö RadioResourceConfigCommon Ö PDSCH-ConfigCommon,
August ‘09 | UL power control in LTE | 32
32
PUSCH power control
α(j) and PL
l
Path loss (PL) is estimated by measuring the power level (Reference Signal
Receive Power, RSRP) of the cell-specific downlink reference signals
(DLRS) and subtracting the measured value from the transmit power level of
the DLRS provided by higher layers
layers,
– SIB Type 2 Ö RadioResourceConfigCommon Ö PDSCH-ConfigCommon,
l
α(j) is used as path-loss compensation factor as a trade-off between total
uplink capacity and cell
cell-edge
edge data rate
rate,
– Full path-loss compensation maximizes fairness for cell-edge UE’s,
– Partial path-loss compensation may increase total system capacity, as less
resources are spent ensuring the success of transmissions from cell-edge UEs and
less inter-cell interference is caused to neighboring cells
cells,
– For α(j=0, 1) can be 0, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0, where 0.7 or 0.8 give a close-tomaximum system capacity by providing an acceptable cell-edge performance,
– For α(j=2) = 1.0,
August ‘09 | UL power control in LTE | 33
33
PUSCH power control
∆TF(i)
l
l
∆TF(i) can be first seen as MCSdependent component in the power
control as it depends in the end on
number of code blocks respectively
bits per code blocks, which translates
to a specific MCS,
MCS the UE uses is under control of
the eNB
Δ TF (i ) = 10 log10 ((2
– Signaled by DCI format 0 on PDCCH,
PDCCH
parameter can be understood as
another way to control the power: when
the MCS is changed, the power will
increase or decrease,
l
For the case that control information
are send instead of user data (=
“Aperiodic CQI reporting”), which is
signaled by a specific bit in the UL
scheduling grant, power offset are set
b hi
by
higher
h llayers ((see nextt slide),
lid )
MPR ⋅ K S
− 1) β
Is K
enabled?
PUSCH
offset
K status is signaled
by higher layers
)
No?
(SIB Type 2 Ö
RadioResourceConfigCommon
Ö UplinkPowerControl),
∆TF(i)=0
Yes, than K=1.25
C −1
What is transmitted
on PUSCH?
MPR = ∑ K r N RE
only UL-SCH data
r =0
β
PUSCH
offset
=1
control information
without UL-SCH data
MPR = OCQI N RE
β
PUSCH
offset
=β
CQI
offset
When “a-periodic CQI/PMI/RI
reporting” is configured
(see TS 36.213, section 7.2.1
and TS 36.212, section 5.3.3.1.1)
OCQI
NRE
C
Kr
Number of CQI bits incl. CRC bits
Resource Elements
Number of code blocks,
Size of code block r,
August ‘09 | UL power control in LTE | 34
34
PUSCH power control
∆TF(i), when aperiodic CQI reporting is configured
l
β
is signaled by higher layers to the UE and is
offset
part of the system information,
CQI
l
l
SIB Type 2 Ö RadioResourceConfigCommon
Ö PUSCH-ConfigCommon,
β offset can take one out of 16 values in [dB]
(see table)
table),
CQI
CQI
I offset
CQI
β offset
0
reserved
1
reserved
2
1.125
3
1.250
4
1.375
5
1.625
6
1 750
1.750
7
2.000
8
2.250
9
2.500
10
2 875
2.875
11
3.125
12
3.500
13
4.000
14
5.000
15
6.250
August ‘09 | UL power control in LTE | 35
35
PUSCH power control
f(i)
l
f(i) is the other component of the dynamic offset, UE-specific Transmit Power
Control (TPC) commands, signaled with the uplink scheduling grant (PDCCH
DCI format 0); two modes are defined: accumulative and absolute,
August ‘09 | UL power control in LTE | 36
36
PUSCH power control
f(i)
l
l
f(i) is the other component of the dynamic offset, UE-specific Transmit Power
Control (TPC) commands, signaled with the uplink scheduling grant (PDCCH
DCI format 0); two modes are defined: accumulative and absolute,
Accumulative TPC commands (for PUSCH,
PUSCH PUCCH,
PUCCH SRS).
SRS)
– Power step relative to previous step, comparable with close-loop power control in
WCDMA, difference available step sizes, which are δPUSCH={±1 dB or -1, 0, +1, +3
dB} for LTE, larger power steps can be achieved by combining TPC- and MCSp
p
power control, Activated at all by
y dedicated RRC signaling,
g
g disabled
dependent
when minimum (-40 dBm) or maximum power (+23 dBm) is reached,
– f (i ) = f (i − 1) + δ PUSCH (i − K PUSCH ), where KPUSCH = 4 for FDD and depends on
the UL-DL configuration for TD-LTE (see TS 36.213, table 5.1.1.1-1)
August ‘09 | UL power control in LTE | 37
37
PUSCH power control
f(i)
l
l
f(i) is the other component of the dynamic offset, UE-specific Transmit Power
Control (TPC) commands, signaled with the uplink scheduling grant (PDCCH
DCI format 0); two modes are defined: accumulative and absolute,
Accumulative TPC commands (for PUSCH,
PUSCH PUCCH,
PUCCH SRS).
SRS)
– Power step relative to previous step, comparable with close-loop power control in
WCDMA, difference available step sizes, which are δPUSCH={±1 dB or -1, 0, +1, +3
dB} for LTE, larger power steps can be achieved by combining TPC- and MCSp
p
power control, Activated at all by
y dedicated RRC signaling,
g
g disabled
dependent
when minimum (-40 dBm) or maximum power (+23 dBm) is reached,
– f (i ) = f (i − 1) + δ PUSCH (i − K PUSCH ), where KPUSCH = 4 for FDD and depends on
the UL-DL configuration for TD-LTE (see TS 36.213, table 5.1.1.1-1),
l
Absolute TPC commands (for PUSCH only).
– Power step of {-4, -1, +1, +4 dB} relative to the basic operating point (Ö set by
PO_PUSCH(j)+α(j)·PL; see previous slides),
– f (i ) = δ PUSCH (i − K PUSCH ) , where KPUSCH=4 for FDD and depends on the UL-DL
configuration for TD-LTE (see TS 36.213, table 5.1.1.1-1),
August ‘09 | UL power control in LTE | 38
38
PUSCH power control
Context
Physical Uplink
Shared Channel (PUSCH)
Physical Downlink Control Channel (PDCCH)
(use DCI format 0 to assign resources for data transmission)
August ‘09 | UL power control in LTE | 39
39
PUSCH power control
Context
Physical Uplink
Shared Channel (PUSCH)
Physical Downlink Control Channel (PDCCH)
(use DCI format 0 to assign resources for data transmission)
August ‘09 | UL power control in LTE | 40
40
PUSCH power control
UL scheduling grant (= PDCCH DCI format 0)
l
l TPC command for scheduled
Flag for format 0 and 1A
differentiation – 1 bit,
PUSCH – 2 bit,
– Indicates DCI format to the UE,
l
Hopping flag – 1 bit
bit,
– Indicates whether uplink frequency
hopping is used or not,
l
Modulation and coding scheme,
redundancy version – 5 bit,
– Indicates modulation scheme and,,
together with the number of allocated
physical resource blocks, the TBS,
l
– Transmit Power Control (TPC) command for
adapting the transmit power on PUSCH,
l Cyclic shift for demodulation
reference signal,
Resource block assignment and
hopping
pp g resource allocation,,
– Depending on resource allocation type,
l
New data indicator – 1 bit,
– Indicates whether a new
transmission shall be sent
sent,
TPC commands
(δPUSCH)
– Indicates the cyclic shift to use for deriving the
uplink demodulation reference signal from
b
base
sequences,
l UL Index – 2 bit,
– Indicates the UL subframe where the
scheduling grant has to be applied,
l DL Assignment Index (DAI) – 2 bit
bit,
– Total # of subframes for PDSCH transmission,
l CQI request – 1 bit,
– Requests the UE to send a CQI,
Modulation and Coding
Scheme (MCS)
August ‘09 | UL power control in LTE | 41
This bit configures
APERIODIC
CQI REPORTING
41
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August ‘09 | UL power control in LTE | 42
42
Rohde & Schwarz LTE test solutions (UE)
R&S LTE Portfolio for chipset, component, and UE testing
Development of
Tx/Rx Modules,
Amplifiers,
RF Components
Signal Generator /
Fading Simulator
UE Layer 1 /
RF Testing
Signal Generator /
Fading Simulator /
Signal Analyzer
UE Protocol
Stack Testing
CMW500
Protocol Tester
including MLAPI
Test scenarios
Interoperability
testing
IOT Test Case
Packages for
CMW500
UE Signaling
Conformance
Testing
CMW500
Protocol Tester
including 3GPP
conformance tests
SMU200A,
AMU200A
CMW500
non-signaling
production
tester
Signal Generator
Field Trials
CMW500
SMBV100A …
SMBV100A,
Signal Analyzer
FSQ/FSG FSV
FSQ/FSG,
Production
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TS8980 RF Test
System for R&D
Virtual testing
software only
software-only
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Radio network
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Test Tools
UE Physical
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TS8980
RF Test
System
&
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System
SMJ100A or
SMBV100A
Signal Analyzer
FSV
August ‘09 | UL power control in LTE | 43
43
Migration to R&S® CMW500 HW platform
August ‘09 | UL power control in LTE | 44
44
Migration to R&S® CMW500 HW platform
R&S® CRTU-G/W
Protocol Test Platform
August ‘09 | UL power control in LTE | 45
45
Migration to R&S® CMW500 HW platform
R&S® CMU200
Radio Communication Tester
R&S® CRTU-G/W
Protocol Test Platform
August ‘09 | UL power control in LTE | 46
46
Migration to R&S® CMW500 HW platform
R&S® CMU200
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also
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also
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August ‘09 | UL power control in LTE | 47
47
Migration to R&S® CMW500 HW platform
R&S® CMU200
Radio Communication Tester
R&S® CMW500
(picture showing configuration as LTE Protocol Test Set)
also
CDMA2000/
1xEV-DO
1xEV
DO
also
2G/2.5G
R&S® CRTU-G/W
Protocol Test Platform
Rel-99
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Rel-4
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August ‘09 | UL power control in LTE | 48
48
Migration to R&S® CMW500 HW platform
One HW p
platform configurable
g
as…
R&S® CMU200
l Non-signaling production unit
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l LTE/HSPA+ Protocol Tester,
l LTE/HSPA+ RF Test Set,,
R&S® CMW500
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also
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2G/2.5G
R&S® CRTU-G/W
Protocol Test Platform
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August ‘09 | UL power control in LTE | 49
49
Migration to R&S® CMW500 HW platform
One HW p
platform configurable
g
as…
R&S® CMU200
l Non-signaling production unit
– All cellular standards, WiMAX, DVB, etc.
Radio Communication Tester
l LTE/HSPA+ Protocol Tester,
l LTE/HSPA+ RF Test Set,,
R&S® CMW500
(picture showing configuration as LTE Protocol Test Set)
also
CDMA2000/
1xEV-DO
1xEV
DO
also
2G/2.5G
l ...as well as future proofed
R&S® CRTU-G/W
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10
August ‘09 | UL power control in LTE | 50
50
How to test PUSCH power control?
l
PUSCH power reaction on…
l
l
l
l
Parameters are signaled by higher layers
layers,
a RRCConnectionReconfiguration would be
required to change parameters!
TPC commands (accumulative and absolute),
PUSCH transport format changes,
Content to be transmitted (user data or control information),
Path loss changes (changing DL RS power),
Bandwidth factor
Basic open-loop starting point Dynamic offset (closed loop)
August ‘09 | UL power control in LTE | 51
51
How to test power control?
PUSCH power control for accumulative TPC commands
2
minimum
po er in LTE
power
August ‘09 | UL power control in LTE | 52
52
How to test power control?
PUSCH power control for accumulative TPC commands
TPC Command Field
In DCI format 0/3
Accumulated
δ PUSCH [dB]
0
-1
1
1
0
2
1
3
3
2
minimum
po er in LTE
power
August ‘09 | UL power control in LTE | 53
53
How to test power control?
PUSCH power control for accumulative TPC commands
TPC Command Field
In DCI format 0/3
Accumulated
δ PUSCH [dB]
0
-1
1
1
0
2
1
3
3
2
minimum
po er in LTE
power
August ‘09 | UL power control in LTE | 54
54
How to test power control?
PUSCH power control for accumulative TPC commands
TPC Command Field
In DCI format 0/3
Accumulated
δ PUSCH [dB]
0
-1
1
1
0
2
1
3
3
2
minimum
po er in LTE
power
August ‘09 | UL power control in LTE | 55
55
How to test power control?
PUSCH power control for accumulative TPC commands
TPC Command Field
In DCI format 0/3
Accumulated
δ PUSCH [dB]
0
-1
1
1
0
2
1
3
3
2
minimum
po er in LTE
power
August ‘09 | UL power control in LTE | 56
56
How to test power control?
PUSCH power control for accumulative TPC commands
TPC Command Field
In DCI format 0/3
Accumulated
δ PUSCH [dB]
0
-1
1
1
0
2
1
3
3
2
minimum
po er in LTE
power
August ‘09 | UL power control in LTE | 57
57
How to test power control?
PUSCH power control for accumulative TPC commands
TPC Command Field
In DCI format 0/3
Accumulated
δ PUSCH [dB]
0
-1
1
1
0
2
1
3
3
2
minimum
po er in LTE
power
August ‘09 | UL power control in LTE | 58
58
How to test power control?
PUSCH power control for accumulative TPC commands
TPC Command Field
In DCI format 0/3
Accumulated
δ PUSCH [dB]
0
-1
1
1
0
2
1
3
3
2
minimum
po er in LTE
power
August ‘09 | UL power control in LTE | 59
59
How to test power control?
PUSCH power control for accumulative TPC commands
TPC Command Field
In DCI format 0/3
Accumulated
δ PUSCH [dB]
0
-1
1
1
0
2
1
3
3
2
minimum
po er in LTE
power
August ‘09 | UL power control in LTE | 60
60
How to test power control?
PUSCH power control for absolute TPC commands
TPC Command Field
In DCI format 0/3
Absolute δ PUSCH [dB]
only DCI format 0
0
-4
1
-1
2
1
3
4
August ‘09 | UL power control in LTE | 61
61
R&S® CMW500 LTE Protocol Tester
Physical Layer testing, procedure verification – UL power control
R&S® CMW500 LTE Protocol Tester
L1 testing Ö PUSCH power control via DCI format 0
August ‘09 | UL power control in LTE | 62
62
R&S® CMW500 LTE Protocol Tester
Physical Layer testing, procedure verification – UL power control
R&S® CMW500 LTE Protocol Tester
L1 testing Ö PUSCH power control via DCI format 0
RIV, MCS
configuration
August ‘09 | UL power control in LTE | 63
63
R&S® CMW500 LTE Protocol Tester
Physical Layer testing, procedure verification – UL power control
R&S® CMW500 LTE Protocol Tester
L1 testing Ö PUSCH power control via DCI format 0
RIV, MCS
configuration
Uplink
assignment
table
August ‘09 | UL power control in LTE | 64
64
R&S® CMW500 LTE Protocol Tester
Physical Layer testing, procedure verification – UL power control
R&S® CMW500 LTE Protocol Tester
L1 testing Ö PUSCH power control via DCI format 0
RIV, MCS
configuration
TPC
configuration
Uplink
assignment
table
August ‘09 | UL power control in LTE | 65
65
R&S® CMW500 LTE Protocol Tester
Physical Layer testing, procedure verification – UL power control
R&S® CMW500 LTE Protocol Tester
L1 testing Ö PUSCH power control via DCI format 0
RIV, MCS
configuration
TPC
configuration
Uplink
assignment
table
Scheduler
(new entry every TTI)
August ‘09 | UL power control in LTE | 66
66
R&S® CMW500 LTE Protocol Tester
Physical Layer testing, procedure verification – UL power control
R&S® CMW500 LTE Protocol Tester
L1 testing Ö PUSCH power control via DCI format 0
RS, PSS, SSS
PBCH transmission
RIV, MCS
configuration
TPC
configuration
Uplink
assignment
table
PDCCH
transmission
Scheduler
(new entry every TTI)
August ‘09 | UL power control in LTE | 67
67
R&S® CMW500 LTE Protocol Tester
Physical Layer testing, procedure verification – UL power control
R&S® CMW500 LTE Protocol Tester
L1 testing Ö PUSCH power control via DCI format 0
RS, PSS, SSS
PBCH transmission
RIV, MCS
configuration
TPC
configuration
Uplink
assignment
table
PDCCH
transmission
RF
Scheduler
(new entry every TTI)
August ‘09 | UL power control in LTE | 68
68
R&S® CMW500 LTE Protocol Tester
Physical Layer testing, procedure verification – UL power control
R&S® CMW500 LTE Protocol Tester
L1 testing Ö PUSCH power control via DCI format 0
RS, PSS, SSS
PBCH transmission
RIV, MCS
configuration
TPC
configuration
Uplink
assignment
table
PDCCH
transmission
Scheduler
(new entry every TTI)
RF
Device Under Test
(DUT; LTE-capable
Terminal))
August ‘09 | UL power control in LTE | 69
69
R&S® CMW500 LTE Protocol Tester
Physical Layer testing, procedure verification – UL power control
R&S® CMW500 LTE Protocol Tester
L1 testing Ö PUSCH power control via DCI format 0
RS, PSS, SSS
PBCH transmission
RIV, MCS
configuration
TPC
configuration
Uplink
assignment
table
PDCCH
transmission
Scheduler
(new entry every TTI)
RF
Device Under Test
(DUT; LTE-capable
Terminal))
PUSCH
reception
August ‘09 | UL power control in LTE | 70
70
R&S® CMW500 LTE Protocol Tester
Physical Layer testing, procedure verification – UL power control
R&S® CMW500 LTE Protocol Tester
L1 testing Ö PUSCH power control via DCI format 0
RS, PSS, SSS
PBCH transmission
RIV, MCS
configuration
TPC
configuration
Evaluate
PUSCH power
Uplink
assignment
table
PDCCH
transmission
Scheduler
(new entry every TTI)
RF
Device Under Test
(DUT; LTE-capable
Terminal))
PUSCH
reception
August ‘09 | UL power control in LTE | 71
71
R&S® CMW500 LTE Protocol Tester
Physical Layer testing, procedure verification – UL power control
August ‘09 | UL power control in LTE | 72
72
PUSCH power control
Transmit output power (Æ PUMAX)
l
l
Influences directly inter-cell interference, magnitude of unwanted
emissions Ù spectral efficiency,
Maximum power is defined for power class 3 with 23 dBm ± 2dB,
l
However the flexibility of the LTE air interface in terms of bandwidth and
modulation requires Maximum Power Reduction (MPR) with using higher
order modulation schemes (higher signal peaks) and increasing transmission
bandwidth,
Modulation
l
Channel bandwidth / Transmission bandwidth configuration (RB)
MPR (dB)
1.4 MHz
3.0 MHz
5 MHz
10 MHz
15 MHz
20MHz
QPSK
>5
>4
>8
> 12
> 16
> 18
≤1
16 QAM
≤5
≤4
≤8
≤ 12
≤ 16
≤ 18
≤1
16 QAM
>5
>4
>8
> 12
> 16
> 18
≤2
Some 3GPP frequency bands network signaling informs the UE about an
additional maximum power reduction (A-MPR) to meet additional
requirements (see next slide),
August ‘09 | UL power control in LTE | 73
73
PUSCH power control
Transmit output power (Æ PUMAX), cont’d.
A-MPR is required to meet requirements specified in the named sections out of 3GPP TS 36.101 V8.6.0
Network
Signalling
value
Requirements
(sub-clause)
E-UTRA Band
Channel
bandwidth (MHz)
Resources
Blocks
A-MPR (dB)
NS_01
NA
NA
NA
NA
NA
6.6.2.2.1
2, 4,10, 35, 36
3
>5
≤1
6.6.2.2.1
2, 4,10, 35,36
5
>6
≤1
6.6.2.2.1
2, 4,10, 35,36
10
>6
≤1
66221
6.6.2.2.1
2 4
2,
4,10,35,36
10 35 36
15
>8
≤1
6.6.2.2.1
2, 4,10,35, 36
20
>10
≤1
NS_04
6.6.2.2.2
TBD
TBD
TBD
NS_05
6.6.3.3.1
1
10,15,20
≥ 50 for QPSK
≤1
NS_06
6.6.2.2.3
12, 13, 14, 17
1.4, 3, 5, 10
n/a
n/a
NS_07
6.6.2.2.3
6.6.3.3.2
13
10
Table 6.2.4-2
Table 6.2.4-2
-
-
-
-
-
NS_03
..
NS_32
August ‘09 | UL power control in LTE | 74
74
PUSCH power control
Transmit output power (Æ PUMAX), cont’d.
A-MPR is required to meet requirements specified in the named sections out of 3GPP TS 36.101 V8.6.0
Network
Signalling
value
Requirements
(sub-clause)
E-UTRA Band
Channel
bandwidth (MHz)
Resources
Blocks
A-MPR (dB)
NS_01
NA
NA
NA
NA
NA
6.6.2.2.1
2, 4,10, 35, 36
3
>5
≤1
6.6.2.2.1
2, 4,10, 35,36
5
>6
≤1
6.6.2.2.1
2, 4,10, 35,36
10
>6
≤1
66221
6.6.2.2.1
2 4
2,
4,10,35,36
10 35 36
15
>8
≤1
6.6.2.2.1
2, 4,10,35, 36
20
>10
≤1
NS_04
6.6.2.2.2
TBD
TBD
TBD
NS_05
6.6.3.3.1
1
10,15,20
≥ 50 for QPSK
≤1
NS_06
6.6.2.2.3
12, 13, 14, 17
1.4, 3, 5, 10
n/a
n/a
NS_07
6.6.2.2.3
6.6.3.3.2
13
10
Table 6.2.4-2
Table 6.2.4-2
-
-
-
-
-
NS_03
..
NS_32
August ‘09 | UL power control in LTE | 75
75
PUSCH power control
Transmit output power (Æ PUMAX), cont’d.
A-MPR is required to meet requirements specified in the named sections out of 3GPP TS 36.101 V8.6.0
Network
Signalling
value
Requirements
(sub-clause)
E-UTRA Band
Channel
bandwidth (MHz)
Resources
Blocks
A-MPR (dB)
NS_01
NA
NA
NA
NA
NA
6.6.2.2.1
2, 4,10, 35, 36
3
>5
≤1
6.6.2.2.1
2, 4,10, 35,36
5
>6
≤1
6.6.2.2.1
2, 4,10, 35,36
10
>6
≤1
66221
6.6.2.2.1
2 4
2,
4,10,35,36
10 35 36
15
>8
≤1
6.6.2.2.1
2, 4,10,35, 36
20
>10
≤1
NS_04
6.6.2.2.2
TBD
TBD
TBD
NS_05
6.6.3.3.1
1
10,15,20
≥ 50 for QPSK
≤1
NS_06
6.6.2.2.3
12, 13, 14, 17
1.4, 3, 5, 10
n/a
n/a
NS_07
6.6.2.2.3
6.6.3.3.2
13
10
Table 6.2.4-2
Table 6.2.4-2
-
-
-
-
-
NS_03
..
NS_32
Section 6.6.2 covers ‘Out of band emission’,
where 6.6.2.2. defines ‘Spectrum Emission Mask (SEM)’
and 6.6.2.2.3. the additional SEM requirements for 3GPP Band 13
August ‘09 | UL power control in LTE | 76
76
PUSCH power control
Transmit output power (Æ PUMAX), cont’d.
A-MPR is required to meet requirements specified in the named sections out of 3GPP TS 36.101 V8.6.0
Network
Signalling
value
Requirements
(sub-clause)
E-UTRA Band
Channel
bandwidth (MHz)
Resources
Blocks
A-MPR (dB)
NS_01
NA
NA
NA
NA
NA
6.6.2.2.1
2, 4,10, 35, 36
3
>5
≤1
6.6.2.2.1
2, 4,10, 35,36
5
>6
≤1
6.6.2.2.1
2, 4,10, 35,36
10
>6
≤1
66221
6.6.2.2.1
2 4
2,
4,10,35,36
10 35 36
15
>8
≤1
6.6.2.2.1
2, 4,10,35, 36
20
>10
≤1
NS_04
6.6.2.2.2
TBD
TBD
TBD
NS_05
6.6.3.3.1
1
10,15,20
≥ 50 for QPSK
≤1
NS_06
6.6.2.2.3
12, 13, 14, 17
1.4, 3, 5, 10
n/a
n/a
NS_07
6.6.2.2.3
6.6.3.3.2
13
10
Table 6.2.4-2
Table 6.2.4-2
-
-
-
-
-
NS_03
..
NS_32
Section 6.6.2 covers ‘Out of band emission’,
where 6.6.2.2. defines ‘Spectrum Emission Mask (SEM)’
and 6.6.2.2.3. the additional SEM requirements for 3GPP Band 13
Section 6.6.3 covers ‘Spurious Emissions’,
where 6.6.3.3. defines additional spurious emissions
and 6.6.3.3.2. the additional spurious emissions for 3GPP Band 13
August ‘09 | UL power control in LTE | 77
77
PUSCH power control
Transmit output power (Æ PUMAX), cont’d.
l
In case of EUTRA Band 13 depending on RB allocation as well as number of
contiguously allocated RB different A-MPR needs to be considered.
August ‘09 | UL power control in LTE | 78
78
PUSCH power control
Transmit output power (Æ PUMAX), cont’d.
3GPP Band 13
746
756
DL
l
777
787
UL
In case of EUTRA Band 13 depending on RB allocation as well as number of
contiguously allocated RB different A-MPR needs to be considered.
August ‘09 | UL power control in LTE | 79
79
PUSCH power control
Transmit output power (Æ PUMAX), cont’d.
3GPP Band 13
746
756
777
DL
787
UL
Network Signalling
Value
Requirements
(sub-clause)
E-UTRA Band
Channel
bandwidth (MHz)
Resources
Blocks
A-MPR
(dB)
…
…
…
…
…
…
NS_07
6.6.2.2.3
6.6.3.3.2
13
10
Table 6.2.4-2
Table 6.2.4-2
…
…
…
…
…
…
l
In case of EUTRA Band 13 depending on RB allocation as well as number of
contiguously allocated RB different A-MPR needs to be considered.
August ‘09 | UL power control in LTE | 80
80
PUSCH power control
Transmit output power (Æ PUMAX), cont’d.
3GPP Band 13
746
756
777
DL
787
UL
Network Signalling
Value
Requirements
(sub-clause)
E-UTRA Band
Channel
bandwidth (MHz)
Resources
Blocks
A-MPR
(dB)
…
…
…
…
…
…
NS_07
6.6.2.2.3
6.6.3.3.2
13
10
Table 6.2.4-2
Table 6.2.4-2
…
…
…
…
…
…
Indicates the lowest RB
index of transmitted
resource blocks
Defines the length of a
contiguous RB allocation
l
Region A
RBStart
[0] - [12]
Region B
Region C
[13] – [18]
[19] – [42]
[43] – [49]
LCRB [RBs]
[6-8]
[1 to 5 and 9-50]
[≥8]
[≥18]
[≤2]
A-MPR [dB]
[8]
[12]
[12]
[6]
[3]
In case of EUTRA Band 13 depending on RB allocation as well as number of
contiguously allocated RB different A-MPR needs to be considered.
August ‘09 | UL power control in LTE | 81
81
R&S® CMW500 LTE RF testing
Supported power measurements for LTE
l Supported power measurements on R&S CMW500® LTE RF Tester,
l Peak Power
(displayed in modulation measurements)
l RB (recourse block) Power
(displayed in Inband Emission meas.)
l Transmit Power
(displayed in modulation and SEM meas.)
August ‘09 | UL power control in LTE | 82
82
R&S® CMW500 LTE RF testing
Supported power measurements for LTE – Tx power aspects
August ‘09 | UL power control in LTE | 83
83
R&S® CMW500 LTE RF testing
Supported power measurements for LTE – Tx power aspects
100 RB transmission bandwidth = 20 MHz channel bandwidth
August ‘09 | UL power control in LTE | 84
84
R&S® CMW500 LTE RF testing
Supported power measurements for LTE – Tx power aspects
August ‘09 | UL power control in LTE | 85
85
R&S® CMW500 LTE RF testing
Supported power measurements for LTE – Tx power aspects
August ‘09 | UL power control in LTE | 86
86
R&S® CMW500 LTE RF testing
Supported power measurements for LTE – Tx power aspects
RB power = Resource Block Power,
Power measured over 1 RB (12 subcarrier = 180 kHz)
August ‘09 | UL power control in LTE | 87
87
R&S® CMW500 LTE RF testing
Supported power measurements for LTE – Tx power aspects
RB power = Resource Block Power,
Power measured over 1 RB (12 subcarrier = 180 kHz)
Tx power = integrated power of all assigned RBs, e.g. 40 RB = 7.2 MHz
August ‘09 | UL power control in LTE | 88
88
Thank you for your attention,
Questions & answer session
…configured as LTE Protocol Tester
R&S® CMW500 Wideband Communication Tester
… configured for LTE RF testing
August ‘09 | UL power control in LTE | 89
89