power control rohdeschwarz_sep2309

1

3GPP UMTS Long Term EvolutionUplink power control in LTE p pAugust 2009

Andreas [email protected]

Technology Manager North America Rohde & Schwarz, GermanyRohde & Schwarz, Germany

Di l iDisclaimer

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.

2

Power control

Uplink power controlWhat'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

August ‘09 | UL power control in LTE | 2

considered to find the balance,

3

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,

I WCDMA d i i d b l i h di f i i h– In WCDMA data rate is increased by lowering the spreading factor increasing the transmission power 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 butfor a given MCS, but…,

l WCDMA uses periodic power control (0.667ms) normally with a step size of ±1 dB (“fast power control”), where LTE allows larger

t b t t il i di llpower steps, but not necessarily periodically,– 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 t i t t l i t f d t h h l diti


fine tuning to control interference and match channel conditions,

4

What is power controlled in the uplink?Physical channels and signals in the uplink

Path loss

UL interference

Multipath propagation

Physical Uplink Physical UplinkShared Channel (PUSCH)Control Channel (PUCCH)(Demodulation Reference Signal, over entire bandwidth in time slots #3 and #10)

(Demodulation Reference Signal,occupied time slot position depends

Sounding Reference Signals (SRS)[optional]


5

Physical channels and signals in the uplinkPUSCH, PUCCH, DMRS, SRS in the time-frequency domain

Demodulation Reference Signals (DMRS)for PUSCH and PUCCH

Physical Uplink Control Channel (PUCCH)issued by UE3 and UE4

Time1 subframe (1 ms) = 2 Time Slots

7 SC-FDMA symbols(normal cyclic prefix)

Physical Uplink Shared Channel (PUSCH)used by UE1 and UE2

Sounding Reference

Signals (SRS)issued by UE1 and UE2

Slot #0 Slot #1 Slot #2 Slot #3

Frequency

e.g. 50 RB = 10 MHz channel bandwidth


Screenshot taken from R&S® SMU200A Vector Signal Generator

6

PUSCH power controlPhysical 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

7



Transmit power for PUSCH in subframe i in dBm



8



Maximum allowed UE powerMaximum allowed UE power in this particular cell,

but at maximum +23 dBm1)




9




but at maximum +23 dBm1)

Number of allocated resource blocks (RB)




10




but at maximum +23 dBm1)Combination of cell- and UE-specific

components configured by L3





11







Cell-specific parameter

configured by L3Transmit power for PUSCH configured by L3in subframe i in dBm



12








configured by L3Transmit power for PUSCH

Downlink path loss estimateconfigured by L3

in subframe i in dBm



13





components configured by L3PUSCH transport

format





in subframe i in dBm



14






format




Power control adjustment derived from TPC command


in subframe i in dBm received in subframe (i-4)



15






format






in subframe i in dBm received in subframe (i-4)

Bandwidth factor


Bandwidth factor1) +23 dBm is maximum allowed power in LTE according to TS 36.101, corresponding to power class 3bis in WCDMA

16






format





Downlink path loss estimate

Basic open-loop starting point

configured by L3in subframe i in dBm received in subframe (i-4)

Bandwidth factor


Basic open-loop starting pointBandwidth factor1) +23 dBm is maximum allowed power in LTE according to TS 36.101, corresponding to power class 3bis in WCDMA

17






format





Downlink path loss estimate

Dynamic offset (closed loop)Basic open-loop starting point

configured by L3in subframe i in dBm received in subframe (i-4)

Bandwidth factor


Dynamic offset (closed loop)Basic open-loop starting pointBandwidth factor1) +23 dBm is maximum allowed power in LTE according to TS 36.101, corresponding to power class 3bis in WCDMA

18

PUSCH power controlPCMAX

l PCMAX=min{PEMAX; PUMAX}l PEMAX is the maximum allowed

power for this particular radio cell configured by higher layers andconfigured 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 WCDMAto power class 3bis in 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) might be used in a cell to further reduce maximum UE


– Network signaling (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)

19

PUSCH power controlMPUSCH

l Power calculation depends also on allocated resource blocks for uplink data transmission, l Number of RB depends on configured bandwidth, but further not each

b f RB i it bl ll tinumber of RB is a suitable allocation,l 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:

⎣ ⎦)1(

2/)1(

STARTCRBsULRB

ULRBCRBs

elseRBLNRIV

thenNL

+−=

≤−

)1()1(

)(

STARTULRBCRBs

ULRB

ULRB

STARTCRBsRB

RBNLNNRIV −−++−=ULRB

PUSCHRB

532 532 NM ≤⋅⋅= ααα


– where α2, α3 and α5 are any integer value,

20





⎣ ⎦)1(

2/)1(

STARTCRBsULRB

ULRBCRBs

elseRBLNRIV

thenNL

+−=

≤−

# of allocated RB,

)1()1(

)(

STARTULRBCRBs

ULRB

ULRB

STARTCRBsRB


PUSCHRB

532 532 NM ≤⋅⋅= ααα

# of allocated RB, e.g. 27 RB,…



21





⎣ ⎦)1(

2/)1(

STARTCRBsULRB

ULRBCRBs

elseRBLNRIV

thenNL

+−=

≤−

# of allocated RB,

Bandwidth, e.g. 10 MHz = 50 RB

Offset in # of RB, e.g. 15 RB

)1()1(

)(

STARTULRBCRBs

ULRB

ULRB

STARTCRBsRB


PUSCHRB

532 532 NM ≤⋅⋅= ααα




22





⎣ ⎦)1(

2/)1(

STARTCRBsULRB

ULRBCRBs

elseRBLNRIV

thenNL

+−=

≤−

# of allocated RB,

Bandwidth, e.g. 10 MHz = 50 RB

Offset in # of RB, e.g. 15 RB

)1()1(

)(

STARTULRBCRBs

ULRB

ULRB

STARTCRBsRB


PUSCHRB

532 532 NM ≤⋅⋅= ααα


…must fulfill this requirement!



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), j = {0, 1},


1) see next slide(s) respectively TS 36.331 V8.6.0 Radio Resource Control specification

24



– 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,



25



Full path loss compensation is considered….




26



Full path loss compensation is considered……no path loss compensation is used.




27





– 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 lossestimated path loss,



28






l j = 0 for semi-persistent scheduling (SPS), j = 1 for dynamic scheduling,



29






l j = 0 for semi-persistent scheduling (SPS), j = 1 for dynamic scheduling, l j = 2 for transmissions corresponding to the retransmission of the random

access response,F j 2 P (2) 0 d P (2) P ∆– For j = 2: P0_UE_PUSCH(2) = 0 and P0_NOMINAL_PUSCH(2) = P0_PRE + ∆PREAMBLE_Msg3, where P0_PRE and ∆PREAMBLE_Msg3 are provided by higher layers,



30






l j = 0 for semi-persistent scheduling (SPS), j = 1 for dynamic scheduling, l j = 2 for transmissions corresponding to the retransmission of the random

access response,F j 2 P (2) 0 d P (2) P ∆– For j = 2: P0_UE_PUSCH(2) = 0 and 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 is in the range of -1…6, where the signaled integer value is multiplied by 2 and


PREAMBLE_Msg3is than the actual power value in dB,


31


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 RACH-ConfigCommon 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


therefore part of each SI message and listed as first entry,

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 layersthe DLRS provided by higher layers,– SIB Type 2 RadioResourceConfigCommon PDSCH-ConfigCommon,


33

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 layersthe DLRS provided by higher layers,– SIB Type 2 RadioResourceConfigCommon PDSCH-ConfigCommon,

l α(j) is used as path-loss compensation factor as a trade-off between total uplink capacity and cell edge data rateuplink capacity and cell-edge data 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 cellsless inter-cell interference is caused to neighboring 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-to-

maximum system capacity by providing an acceptable cell-edge performance,– For α(j=2) = 1.0,


34

PUSCH power control ∆TF(i)

l ∆TF(i) can be first seen as MCS-dependent component in the power control as it depends in the end on number of code blocks respectively

TF 10( ) 10log ((2 1) )SMPR K PUSCHoffseti β⋅Δ = −

K status is signaledby higher layers

(SIB Type 2RadioResourceConfigCommon

UplinkPowerControl),

bits per code blocks, which translates to a specific MCS,

l MCS the UE uses is under control of the eNB

Signaled by DCI format 0 on PDCCH

No?

Yes, than K=1.25

∆TF(i)=0Is K enabled?

– Signaled by DCI format 0 on 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

control informationwithout UL-SCH data

only UL-SCH dataWhat is transmitted on PUSCH? 1

1

0

=

=∑−

=

β PUSCH

offset

C

rREr NKMPR

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 h l ( t lid )

When “a-periodic CQI/PMI/RI reporting” is configured

(see TS 36.213, section 7.2.1and TS 36.212, section 5.3.3.1.1)

OCQI Number of CQI bits incl. CRC bitsN Resource Elements

ββ CQI

offset

PUSCH

offset

RECQI NOMPR

=

=


by higher layers (see next slide), NRE Resource ElementsC Number of code blocks,Kr Size of code block r,

35

PUSCH power control ∆TF(i), when aperiodic CQI reporting is configured

l is signaled by higher layers to the UE and is part of the system information,l SIB Type 2 RadioResourceConfigCommon

0 reserved

1 reserved

CQIoffsetI CQI

offsetββ CQI

offset

l SIB Type 2 RadioResourceConfigCommon PUSCH-ConfigCommon,

l can take one out of 16 values in [dB] (see table)

2 1.125

3 1.250

4 1.375

5 1.625

6 1 750

β CQI

offset

(see table), 6 1.750

7 2.000

8 2.250

9 2.500

10 2 87510 2.875

11 3.125

12 3.500

13 4.000

14 5.000


14 5.000

15 6.250

36

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,


37



l Accumulative TPC commands (for PUSCH PUCCH SRS)l Accumulative TPC commands (for PUSCH, PUCCH, 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 MCS-dependent power control, Activated at all by dedicated RRC signaling, disabled p p y g gwhen minimum (-40 dBm) or maximum power (+23 dBm) is reached,

– , 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)

)()1()( PUSCHPUSCH Kiifif −+−= δ


38



l Accumulative TPC commands (for PUSCH PUCCH SRS)l Accumulative TPC commands (for PUSCH, PUCCH, 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 MCS-dependent power control, Activated at all by dedicated RRC signaling, disabled p p y g gwhen minimum (-40 dBm) or maximum power (+23 dBm) is reached,

– , 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).

)()1()( PUSCHPUSCH Kiifif −+−= δ

– Power step of {-4, -1, +1, +4 dB} relative to the basic operating point ( set by PO_PUSCH(j)+α(j)·PL; see previous slides),

– , 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),

)()( PUSCHPUSCH Kiif −= δ


39

PUSCH power controlContext

Physical UplinkShared Channel (PUSCH)

Physical Downlink Control Channel (PDCCH)(use DCI format 0 to assign resources for data transmission)


40

PUSCH power controlContext

Physical UplinkShared Channel (PUSCH)

Physical Downlink Control Channel (PDCCH)(use DCI format 0 to assign resources for data transmission)


41

PUSCH power controlUL scheduling grant (= PDCCH DCI format 0)

TPC commands(δPUSCH)

l TPC command for scheduled PUSCH – 2 bit,

– Transmit Power Control (TPC) command for adapting the transmit power on PUSCH,

l Flag for format 0 and 1A differentiation – 1 bit,

– Indicates DCI format to the UE,

l Hopping flag – 1 bitl Cyclic shift for demodulation

reference signal,– Indicates the cyclic shift to use for deriving the

uplink demodulation reference signal from b

l Hopping flag – 1 bit,– Indicates whether uplink frequency

hopping is used or not,

l Resource block assignment and hopping resource allocation, 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

pp g ,– Depending on resource allocation type,

l Modulation and coding scheme, redundancy version – 5 bit,

– Indicates modulation scheme and, l DL Assignment Index (DAI) – 2 bit,– Total # of subframes for PDSCH transmission,

l CQI request – 1 bit,– Requests the UE to send a CQI,

,together with the number of allocated physical resource blocks, the TBS,

l New data indicator – 1 bit,– Indicates whether a new

transmission shall be sent


This bit configuresAPERIODIC

CQI REPORTING

transmission shall be sent,Modulation and Coding

Scheme (MCS)

42

Rohde & Schwarz LTE test solutions (UE)

Interoperabilitytesting

UE Layer 1 /RF Testing

Development ofTx/Rx Modules,

UE ProtocolStack Testing

ProductionTesting

UE SignalingConformance

R&S LTE Portfolio for chipset, component, and UE testing

testingRF TestingTx/Rx Modules,Amplifiers,

RF Components

Stack Testing TestingConformanceTesting

Signal Generator /Fading Simulator /

Signal AnalyzerCMW500

Protocol Testerincluding MLAPITest scenarios

IOT Test CasePackages for

CMW500

CMW500Protocol Testerincluding 3GPP

conformance tests

CMW500non-signaling

productiontester

Signal Generator /Fading Simulator

Field Trials

CMW500

UE PhysicalConformance(RF Testing)

Signal Generator

Virtual testingsoftware onlySMBV100A

SMU200A, AMU200A

TS8980 RF TestSystem for R&D

Radio networkanalyzers incl.ROMES Drive

Test Tools

TS8980RF TestSystem

&RRM TestSystem

SMJ100A orSMBV100A

Signal Analyzer

FSV

software-onlysolutionSignal Analyzer

FSQ/FSG FSV

SMBV100A, …


System for R&D Test Tools FSVFSQ/FSG, FSV

43

Rohde & Schwarz LTE test solutions (UE)

Interoperabilitytesting

UE Layer 1 /RF Testing

Development ofTx/Rx Modules,

UE ProtocolStack Testing

ProductionTesting

UE SignalingConformance

R&S LTE Portfolio for chipset, component, and UE testing

testingRF TestingTx/Rx Modules,Amplifiers,

RF Components

Stack Testing TestingConformanceTesting

Signal Generator /Fading Simulator /

Signal AnalyzerCMW500

Protocol Testerincluding MLAPITest scenarios

IOT Test CasePackages for

CMW500

CMW500Protocol Testerincluding 3GPP

conformance tests

CMW500non-signaling

productiontester

Signal Generator /Fading Simulator

Field Trials

CMW500

UE PhysicalConformance(RF Testing)

Signal Generator

Virtual testingsoftware onlySMBV100A

SMU200A, AMU200A

TS8980 RF TestSystem for R&D

Radio networkanalyzers incl.ROMES Drive

Test Tools

TS8980RF TestSystem

&RRM TestSystem

SMJ100A orSMBV100A

Signal Analyzer

FSV

software-onlysolutionSignal Analyzer

FSQ/FSG FSV

SMBV100A, …


System for R&D Test Tools FSVFSQ/FSG, FSV

44

Migration to R&S® CMW500 HW platform


45

Migration to R&S® CMW500 HW platform

R&S® CRTU-G/WProtocol Test Platform


46

Migration to R&S® CMW500 HW platformR&S® CMU200R&S® CMU200

Radio Communication Tester



47



alsoalso

alsoCDMA2000/

1xEV-DO2G/2.5G2G/2.5G

1xEV DO


Rel-99 Rel-4 Rel-5 Rel-6


Rel 99 Rel 4 Rel 5 Rel 6

48



R&S® CMW500(picture showing configuration as LTE Protocol Test Set)

alsoalso

alsoCDMA2000/


1xEV DO





49

Migration to R&S® CMW500 HW platformOne HW platform configurable as… R&S® CMU200 p g

l Non-signaling production unit – All cellular standards, WiMAX, DVB, etc.

l LTE/HSPA+ Protocol Tester,l LTE/HSPA+ RF Test Set,

R&S® CMU200Radio Communication Tester

,R&S® CMW500

(picture showing configuration as LTE Protocol Test Set)

alsoalso

alsoCDMA2000/


1xEV DO





50

Migration to R&S® CMW500 HW platformOne HW platform configurable as… R&S® CMU200 p g

l Non-signaling production unit – All cellular standards, WiMAX, DVB, etc.

l LTE/HSPA+ Protocol Tester,l LTE/HSPA+ RF Test Set,

R&S® CMU200Radio Communication Tester

,R&S® CMW500

(picture showing configuration as LTE Protocol Test Set)

alsoalso

alsoCDMA2000/


1xEV DO

Rel-9 Rel-10

l ...as well as future proofed platform for the upcoming challenges…


Rel-99 Rel-4 Rel-5 Rel-6 Rel-7 Rel-8


Rel 9 Rel 10Rel 99 Rel 4 Rel 5 Rel 6 Rel 7 Rel 8

51

Parameters are signaled by higher layers

How to test PUSCH power control?Parameters are signaled by higher layers,

a RRCConnectionReconfiguration would be required to change parameters!l PUSCH power reaction on…

l TPC commands (accumulative and absolute), l PUSCH transport format changes, l Content to be transmitted (user data or control information),l Path loss changes (changing DL RS power),

Dynamic offset (closed loop)Basic open-loop starting pointBandwidth factor


52

How to test power control?PUSCH power control for accumulative TPC commands

2

minimum po er in LTE


power in LTE

53


TPC Command Field In DCI format 0/3

Accumulated[dB]

0 1

PUSCHδ

0 -1

1 0

2 1

3 3

2



power in LTE

54



Accumulated[dB]

0 1

PUSCHδ

0 -1

1 0

2 1

3 3

2



power in LTE

55



Accumulated[dB]

0 1

PUSCHδ

0 -1

1 0

2 1

3 3

2



power in LTE

56



Accumulated[dB]

0 1

PUSCHδ

0 -1

1 0

2 1

3 3

2



power in LTE

57



Accumulated[dB]

0 1

PUSCHδ

0 -1

1 0

2 1

3 3

2



power in LTE

58



Accumulated[dB]

0 1

PUSCHδ

0 -1

1 0

2 1

3 3

2



power in LTE

59



Accumulated[dB]

0 1

PUSCHδ

0 -1

1 0

2 1

3 3

2



power in LTE

60



Accumulated[dB]

0 1

PUSCHδ

0 -1

1 0

2 1

3 3

2



power in LTE

61

How to test power control?PUSCH power control for absolute TPC commands


Absolute [dB]only DCI format 0

PUSCHδ

0 -4

1 -1

2 1

3 4


62

R&S® CMW500 LTE Protocol TesterPhysical Layer testing, procedure verification – UL power control

R&S® CMW500 LTE Protocol TesterL1 testing PUSCH power control via DCI format 0


63



RIV, MCSconfiguration


64




Uplink assignment

table


65



TPC


Uplink configuration assignment

table


66



SchedulerTPC


Uplink (new entry every TTI)configuration assignment

table


67



RS, PSS, SSSPBCH transmission

PDCCHtransmission

SchedulerTPC



table


68




RFPDCCHtransmission

SchedulerTPC



table


69




Device Under Test(DUT; LTE-capable Terminal)

RFPDCCHtransmission

SchedulerTPC


Uplink )(new entry every TTI)configuration assignment

table


70





RFPDCCHtransmission

SchedulerTPC


Uplink )(new entry every TTI)

PUSCHreception

configuration assignmenttable


71





RFPDCCHtransmission

SchedulerTPC


Uplink )(new entry every TTI)

PUSCHreception

Evaluate PUSCH power

configuration assignmenttable


72



73

PUSCH power controlTransmit output power ( PUMAX)

l Influences directly inter-cell interference, magnitude of unwanted emissions spectral efficiency,

l 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,

ModulationChannel 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

l Some 3GPP frequency bands network signaling informs the UE about an additional maximum power reduction (A-MPR) to meet additional requirements (see next slide),

16 QAM > 5 > 4 > 8 > 12 > 16 > 18 ≤ 2


74

PUSCH power controlTransmit output power ( PUMAX), cont’d.

Network Signalling

value

Requirements (sub-clause)

E-UTRA Band Channel bandwidth (MHz)

Resources Blocks

A-MPR (dB)

A-MPR is required to meet requirements specified in the named sections out of 3GPP TS 36.101 V8.6.0

NS_01 NA NA NA NA NA

NS_03

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

6 6 2 2 1 2 4 10 35 36 15 >8 ≤ 16.6.2.2.1 2, 4,10,35,36 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 6.6.2.2.36.6.3.3.2 13 10 Table 6.2.4-2 Table 6.2.4-2

..

NS_32 - - - - -


75


Network Signalling

value



Resources Blocks

A-MPR (dB)



NS_03

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

6 6 2 2 1 2 4 10 35 36 15 >8 ≤ 16.6.2.2.1 2, 4,10,35,36 15 >8 ≤ 1

6.6.2.2.1 2, 4,10,35, 36 20 >10 ≤ 1


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 6.6.2.2.36.6.3.3.2 13 10 Table 6.2.4-2 Table 6.2.4-2

..

NS_32 - - - - -


76


Network Signalling

value



Resources Blocks

A-MPR (dB)



NS_03

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

6 6 2 2 1 2 4 10 35 36 15 >8 ≤ 16.6.2.2.1 2, 4,10,35,36 15 >8 ≤ 1

6.6.2.2.1 2, 4,10,35, 36 20 >10 ≤ 1


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 6.6.2.2.36.6.3.3.2 13 10 Table 6.2.4-2 Table 6.2.4-2

..

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

77


Network Signalling

value



Resources Blocks

A-MPR (dB)



NS_03

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

6 6 2 2 1 2 4 10 35 36 15 >8 ≤ 16.6.2.2.1 2, 4,10,35,36 15 >8 ≤ 1

6.6.2.2.1 2, 4,10,35, 36 20 >10 ≤ 1


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 6.6.2.2.36.6.3.3.2 13 10 Table 6.2.4-2 Table 6.2.4-2

..

NS_32 - - - - -

Section 6.6.3 covers ‘Spurious Emissions’, Section 6.6.2 covers ‘Out of band emission’,


where 6.6.3.3. defines additional spurious emissions and 6.6.3.3.2. the additional spurious emissions for 3GPP Band 13

where 6.6.2.2. defines ‘Spectrum Emission Mask (SEM)’and 6.6.2.2.3. the additional SEM requirements for 3GPP Band 13

78


l In case of EUTRA Band 13 depending on RB allocation as well as number of


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.

79


DL UL

756746 7877773GPP Band 13




80


DL UL

756746 7877773GPP Band 13

Network Signalling Value

Requirements (sub-clause) E-UTRA Band Channel

bandwidth (MHz)Resources

BlocksA-MPR

(dB)

… … … … … …

NS_07 6.6.2.2.36.6.3.3.2 13 10 Table 6.2.4-2 Table 6.2.4-2

… … … … … …




81


DL UL

756746 7877773GPP Band 13

Network Signalling Value

Requirements (sub-clause) E-UTRA Band Channel

bandwidth (MHz)Resources

BlocksA-MPR

(dB)

… … … … … …

NS_07 6.6.2.2.36.6.3.3.2 13 10 Table 6.2.4-2 Table 6.2.4-2

… … … … … …

Region A Region B Region CIndicates the lowest RB

index of transmittedresource blocks


RBStart [0] - [12] [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]

resource blocks

Defines the length of a contiguous RB allocation



82

R&S® CMW500 LTE RF testingSupported 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 RB (recourse block) Power (displayed in Inband Emission meas.)l Transmit Power (displayed in modulation and SEM meas.)


83

R&S® CMW500 LTE RF testingSupported power measurements for LTE – Tx power aspects


84


100 RB transmission bandwidth = 20 MHz channel bandwidth


85



86



87


RB power = Resource Block Power measured over 1 RB (12 subcarrier = 180 kHz)RB power = Resource Block Power, measured over 1 RB (12 subcarrier = 180 kHz)


88


RB power = Resource Block Power measured over 1 RB (12 subcarrier = 180 kHz)RB power = Resource Block Power, measured over 1 RB (12 subcarrier = 180 kHz)Tx power = integrated power of all assigned RBs, e.g. 40 RB = 7.2 MHz


89

Thank you for your attention, Questions & answer session

…configured as LTE Protocol Tester

R&S® CMW500 Wideband Communication Tester… configured for LTE RF testing


power control rohdeschwarz_sep2309

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