Immobi Power Control

(1)

Power Control & Power Setting

(2)

Overview

(3)

Overview

Objective

Improve cell edge behaviour, reduce

Improve cell edge behaviour, reduce inter-cell interference and power consumption.

inter-cell interference and power consumption.

Downlink (DL)

DL ‘Semi-static’ Power Setting

•

• eN

eNod

odeB

eB gi

give

ves

s fixed power density per PRB

fixed power density per PRB

scheduled for transport.

–

Total Tx

Total Tx powe

power is max.

r is max. when a

when all PRBs

ll PRBs are sched

are scheduled

uled

–

No adaptive/dynamic power control

–

(O&M parameter) Cell Power Reduction level CELL_PWR_RED [0...10] dB attenuation in 0.1 dB steps

DL Power Control on PDCCH

Uplink (UL)

Slow Uplink Power Control

•

• Combination of open loop PC and closed loop PC

Combination of open loop PC and closed loop PC

•

• Open Loop Power Control (OLPC)

Open Loop Power Control (OLPC)

–

Calc

Calculate

ulated at the UE based on pa

d at the UE based on pathlo

thloss

ss mea

measurem

surements

ents

•

• Closed Loop Power Control (CLPC)

Closed Loop Power Control (CLPC)

–

Based on exchange of feedback data and commands between UE and eNodeB

–

SW-licensed enhancement (can be switched on and off)

dlCellPwrRed

Reduction of DL Tx

Reduction of DL Tx power; deductedpower; deducted from max. antenna TX power. from max. antenna TX power. LNCEL; 0..10; 0.1;

(4)

UL

(5)

UL-PC: Overview

LTE: orthogonal U

LTE: orthogonal UL Tx,

L Tx, i.e. near-far-problem

i.e. near-far-problem much less severe

much less severe than WCDMA

than WCDMA



•

• UL: dyna

UL: dynamic, slow P

mic, slow PC –

C – Open Loop (O

Open Loop (OL) & Closed Loop (CL

L) & Closed Loop (CL))

•

• need for PL / shadowing etc. compensation

need for PL / shadowing etc. compensation



OL PC

•

• need for correction/ adjustments of e.g. open loop inaccuracies

need for correction/ adjustments of e.g. open loop inaccuracies



CL PC

Interference (I)

-- mai

main cause

n cause: int

: inter-c

er-cell

ell

Signal strength S:

Depends on PL, indoor loss etc.,

i.e. location

Low Low High High

Power control

does not control the absolute UE Tx power but the Power Spectral Density (PSD)

does not control the absolute UE Tx power but the Power Spectral Density (PSD), power per Hz, for a device.

, power per Hz, for a device.

The PSDs at the eNodeB from different users have to

The PSDs at the eNodeB from different users have to be close to each other

be close to each other

so the receiver doesn’t work over a large range

of powers.

Different data rates mean different Tx bandwidths so the absolute Tx power of the UE will also change.

PC makes that the

PSD is constant independently of the Tx bandwidth.

Noise (N) = k

_B_B

T

∆∆

_{f + NF}

eNB eNB

(6)

Overview

Procedure for Slow UL Power Control

•

• UE co

UE control

ntrols the Tx

s the Tx pow

power to kee

er to keep the

p the transmitted power spectral density (PSD) constant

transmitted power spectral density (PSD) constant

independent of

the allocated transmit bandwidth (#PRBs)

•

• If no feedba

If no feedback from eNodeB

ck from eNodeB ( in the PDCCH U

( in the PDCCH UL PC command) the

L PC command) the UE performs ope

UE performs open loop PC based on

n loop PC based on path

path

loss

loss measuremen

measurements

ts

•

• If feed

If feedback from e

back from eNode

NodeB

B the UE co

the UE correct

rrects the PSD w

s the PSD when receiv

hen receiving PC com

ing PC command

mands from eNo

s from eNodeB

deB ( in the

( in the

PDCCH UL

PDCCH UL PC command

PC command

))



PC commands (up

PC commands (up and down)

and down) based on

based on UL quality

UL quality and signal

and signal level measurements

level measurements

•

• Applied separately for PUSCH, PUCCH

Applied separately for PUSCH, PUCCH

•

• Scope of UL PC is UE

Scope of UL PC is UE level ( performed separately for each UE in a

level ( performed separately for each UE in a cell)

cell)

1) Initial TX power level 1) Initial TX power level 2) SINR measurment

2) SINR measurment 3) Setting new power offset

3) Setting new power offset 4) TX power level4) TX power level adjustment with the new adjustment with the new offset

(7)

UL

(8)

UL-PC: PUSCH Equation

*PH = Power Headroom *PH = Power Headroom

[ [

dBm

]]

ii

f

ii

PL

j

P

ii

M

P

ii

P

_PUSCH_PUSCH

((

))

=

min

{

_CMAX_CMAX

,,

10

10 log

log

₁₀₁₀

((

_PUSCH_PUSCH

((

))

+

_{O_PUSCH}_{O_PUSCH}

((

))

+

((

))

⋅⋅

+

∆

_TF_TF

((

))

+

((

)}

Open Loop (OL)

Closed Loop (CL)

P

(9)

UL-PC: PUSCH

[ [

dBm

]]

ii

f

ii

PL

j

P

ii

M

P

ii

P

_PUSCH_PUSCH

((

))

=

min

{

_CMAX_CMAX

,,

10

10 log

log

₁₀₁₀

((

_PUSCH_PUSCH

((

))

+

((

))

+

((

))

⋅⋅

+

∆

_TF_TF

((

))

+

((

)}

P

_PUSCH_PUSCH

(i) :PUSCH Power in subframe

i

P

_CMAX_CMAX

:: max. allowed UE power

max. allowed UE power (23

(23

dBm

for

clas

s 3)

M

_PUSCH_PUSCH

: number of scheduled RBs

: number of scheduled RBs (The UE Tx. Power increases proportionally to #

(The UE Tx. Power increases proportionally to #

of PRBs)

P

(j) = P

(j)

= P

_{O_NOMINAL_PUSCH}_{O_NOMINAL_PUSCH}

(j) +

_{PO_UE_PUSCH}_{PO_UE_PUSCH}

(j)

PL:

PL: pat

pat

hlo

hloss

ss

[d

[dB]

B]

=

= ref

refere

erence

nceSig

Signal

nalPower

Power

–

hig

higher

her lay

layer f

er filt

iltere

ered R

d RSRP

SRP

∆

TF

(i) = 10 log 10 (

2MPR K2MPR Kss

–

– 1) for K

1) for K

ss

= 1.25 else 0, MPR = TBS/N

RERE

, N

RERE

: number of RE

Ks defined by

Ks defined by deltaMCS-Enabled

deltaMCS-Enabled , UE specific

, UE specific

f(i): TPC (Closed Loop adjustment)

[ [ ]]

dB

ii

f

ii

PL

j

P

ii

M

P

ii

PH

((

))

== _CMAX_CMAX −−

10

10 log

log

₁₀₁₀

((

_PUSCH_PUSCH

((

))

++ _{O_PUSCH}_{O_PUSCH}

((

))

++α α ⋅⋅ ++∆∆_TF_TF

((

))

++

((

))

_{PH = Power Headroom}

j : This can be 0 or 1, j = 0, 1 c

ome from higher lay

er

Semi-persistant: j=0 /

dyn

amic

scheduling: j=1

P

(0,1): cell specific (SysInfo)

P

_{O_UE_PUSCH}_{O_UE_PUSCH}

(0,1): UE specific (RRC)

α

_{(0,1) = 0.0, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9,}

_{(0,1) = 0.0, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0 (partial PL compensation by open loop)}

_{1.0 (partial PL compensation by open loop)}

Random access grant: j=2

(10)

Open Loop PC vs. Closed Loop

PC

PL

j

P

Po

Operating

Basic

_

int

=

((

))

+

α α

((

))

⋅⋅

Open Loop Power Control

Target: provide a basic operating point for a

Target: provide a basic operating point for a suitable PSD for an

suitable PSD for an average

average

MCS (average SINR):

•

• Open Loop Powe

Open Loop Power

r Control takes into account effects like inter-cell

Control takes into account effects like inter-cell

interference and shadowing

•

• Based on PL (Pathloss)

Based on PL (Pathloss)

Closed Loop Power Control

f(i) adjustments

Target: Fine tuning around the basic operating point

•

• Adapt dynam

Adapt dynamically

ically to the channel conditions (take into account e.g. fast fading)

to the channel conditions (take into account e.g. fast fading)

•

• Correct the estimations of power from the open loop PC

Correct the estimations of power from the open loop PC

ulpcEnable

(11)

Open Loop PC

P

_{O_PUSCH}

(j) = P

_{O_NOMINAL_PUSCH}

(j) +

_{PO_UE_PUSCH}

(j)

j=0 -> PUSCH transm

j=0 -> PUSCH transmission with semi-pe

ission with semi-persistent gran

rsistent grantt

j=1 -> PUSCH

j=1 -> PUSCH transmission with dynamic

transmission with dynamic scheduling

scheduling

j=2 -> PUSCH

j=2 -> PUSCH transmission for random access

transmission for random access grant

grant

P

(j) ->

(j) -> cell specific

cell specific

component

signaled from system information for j=0, 1

This term is a

This term is a common pow

common power

er level for all mobiles i

level for all mobiles in the cell (used to control

n the cell (used to control SINR)

SINR)

PO_UE_PUSCH

(j) ->

(j) -> UE specific component

UE specific component

provided by higher layers (RRC) for j=

provided by higher layers (RRC) for j=0,1

0,1

This term is a

This term is a UE specific offset used to correct the

UE specific offset used to correct the errors from the estimation of the pathloss

errors from the estimation of the pathloss

[ [

dBm

]]

ii

f

ii

PL

j

P

ii

M

P

ii

P

_PUSCH_PUSCH

((

))

=

min

{

_CMAX_CMAX

,,

10

10 log

log

₁₀₁₀

((

_PUSCH_PUSCH

((

))

+

((

))

+

((

))

⋅⋅

+

∆

_TF_TF

((

))

+

((

)}

p0NomPusch

Nominal Power for UE PUSCH Tx Nominal Power for UE PUSCH Tx Power Calculation

Power Calculation LNCEL; -126..24dbm; 1;

(12)

PUSCH Formula

Alpha

This path loss compensation factor a is

This path loss compensation factor a is adjustable by

adjustable by

O&M.

α

is a cell -

is a cell - speci

specific par

fic parame

ameter (bro

ter (broadca

adcasted on

sted on

BCH).

α

∈

_{[0.0, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9,}

_1.0

_]]

α

_{= 0 ,}

_{no compensation}

α

_{= 1 ,}

_{full compensation}

α

≠

_{{ 0 ,1}

_{} , fractional compensation}

PL:

PL: pat

pathlo

hloss

ss

[d

[dB]

B]

= ref

=

referen

erenceS

ceSign

ignalP

alPower

ower

–

higher layer filtered RSRP

ulpcAlpha

LNCEL; 0, 0.4..1.0; 0.1; LNCEL; 0, 0.4..1.0; 0.1; 1.01.0

[ [

dBm

]]

ii

f

ii

PL

j

P

ii

M

P

ii

P

(13)

Conventional & Fractional PC

•

• Conventional PC schemes

Conventional PC schemes

::

–

Attempt to maintain a constant SINR at

Attempt to maintain a constant SINR at the receiver

the receiver

–

UE increase

UE increases the Tx

s the Tx power to fu

power to fully compen

lly compensate for increases

sate for increases in the path

in the path loss

loss

•

• Fractional PC schemes

Fractional PC schemes

::

–

Allow the received SINR to

Allow the received SINR to decrease as the path loss

decrease as the path loss increases.

increases.

–

UE Tx

UE Tx power increa

power increases at a reduced rate as the path loss increases. Incre

ses at a reduced rate as the path loss increases. Increases in path loss are only partially comp

ases in path loss are only partially compensated.

ensated.

–

[+]

:: Improve air interface efficiency

Improve air interface efficiency

&

& increase average cell throughputs

increase average cell throughputs

by reducing Inter-cell interference

•

• 3GPP specifies fractional powe

3GPP specifies fractional power control for the

r control for the PUSCH with the option to disable it & revert

PUSCH with the option to disable it & revert to conventional based on

to conventional based on



Conventional Power

Control:



=1

If Path Loss

increases by 10 dB

the UE Tx power

increases by 10 dB

Fractional

Power Control:



!

{ 0 ,1}

If Path Loss

increases by 10

dB the UE Tx

power increases

by < 10 dB

UE Tx UE Tx Power Power UE TxUE Tx Power Power UL UL SINR SINR ULUL SINR SINR

(14)

MCS dependent component

[ [

dBm

]]

ii

f

ii

PL

j

P

ii

M

P

ii

P

_PUSCH_PUSCH

((

))

=

min

{

_CMAX_CMAX

,,

10

10 log

log

₁₀₁₀

((

_PUSCH_PUSCH

((

))

+

((

))

+

((

))

⋅⋅

+

∆

_TF_TF

((

))

+

((

)}

25

25 ..

1

= = S S

K

for

))

1

2

2 ((

log

10

10 ))

((

=

₁₀₁₀

−

∆

MPR MPR∗∗K K ss TF TF

ii

•

• TF = Transport Format

TF = Transport Format

•

• Ks -

Ks - Enabling/disa

Enabling/disabling of the transpo

bling of the transport format dep

rt format dependent offset o

endent offset on a per

n a per UE basis

UE basis

•

• If this parameter is enabled, PUSCH power calculation in UE uplink power control equation takes the

If this parameter is enabled, PUSCH power calculation in UE uplink power control equation takes the

Transport Block size in account during the power calculation

•

• Could be seen as dynamic offset of the TX power: when the BTS changes the MCS for the UE then the UE

Could be seen as dynamic offset of the TX power: when the BTS changes the MCS for the UE then the UE

indirectly may adapt the power

•

• Increase the powe

Increase the power

r if the Transport Format (MCS, TBS size, Number of Resource Blocks) it

if the Transport Format (MCS, TBS size, Number of Resource Blocks) it is so selected

is so selected

to increase the number of bits per Resource Element

MPR = TBS/N

_RE_RE

with N

_RE_RE

: number of RE, TBS = Transport Block Size

0 Otherwise

deltaTfEnabled

Enabled

Enabled TB sizeTB size (MCS) impact(MCS) impacttoto UE PUSCH power calculation UE PUSCH power calculation LNCEL; Yes/No;

(15)

-UL

UL

PU

SCH P

owe

r Co

ntr

ol -

Par

ame

ter

C

Caatteeggoorryy PPaarraammeetteerr HHuuaawweeii VVaalluuee NNookkiiaa VVaalluuee EErriiccssssoonnss VaValluuee ZZTTEE VVaalluuee

PUSCH Power PUSCH Power Control Control P P0 0 PPUUSSCCHH CCeellllUUllppccCCoommmm..PP00 NominalPUSCH NominalPUSCH --880 d0 dBBmm [[LLNNCCEELL]] p0NomPuc! p0NomPuc!

--880 d0 dBBmm [[EEUUttrraannCCeellll""####]] p$eroNominalPuc! p$eroNominalPuc!

-8

-80 dB0 dBmm [P[PowowererCoConntrtrololULUL]] p0NominalPUSCH p0NominalPUSCH -%& -%& dBm dBm ' ' CCeellllUUllppccCCoommmm..PPaa LoCoe(( LoCoe(( & & ))00..88** [[LLNNCCEELL]] ulpc+lp!a ulpc+lp!a %

% ))aallpp!!a a ,,** [[EEUUttrraannCCeellll""####] ] aallpp!!aa 8 8 ))00..88** [[PPoowweerrCCoonnttrroollUULL]] alp!a

alp!a

& )0.8* & )0.8* 

" " ))ii** CCeellllUUllppcc##eeddiicc..##eell ta/cEnaled ta/cEnaled

0

0 ))oo((((** [[LLNNCCEELL]] delta(Enaled delta(Enaled

0

0 [[PPoowweerrCCoonnttrroollUULL]]11 00 ()i

()i* -* - CloCloe Loe Loopop Switc! Switc! Cell+l2oSwitc!.Ul Cell+l2oSwitc!.Ul Pc+l2oSwitc! Pc+l2oSwitc! -3nnerLoopPuc!S 3nnerLoopPuc!S witc! witc! o onn [[LLNNCCEELL]] actUlpc/et!od actUlpc/et!od [LNCEL] [LNCEL] ulpcLowle4Sc! ulpcLowle4Sc! [LNCEL] [LNCEL] ulpcUple4Sc! ulpcUple4Sc! [LNCEL] [LNCEL] ulpcLow5ualSc! ulpcLow5ualSc! [LNCEL] [LNCEL] ulpcUp5ualSc! ulpcUp5ualSc! 6 6 )Puc!CLPucc )Puc!CLPucc !CL* !CL* -,06 dBm -,06 dBm -78 dBm -78 dBm ,8 ,8 ,0 ,0 [PowerControlUL] [PowerControlUL] witc!"orCLPCo(PUS witc!"orCLPCo(PUS CH CH , ,

)}

((

))

((

))

((

log(

10

10 ,,

min{

))

((

ii

P

M

ii

P

_{_}_{_}

PL

ii

f

ii

P

(16)

UL

PU

SC

H M

ess

ge

3

3 Po

Po

we

r

Co

nt

ro

l -

Pa

ra

me

te

r

)}

((

))

((

))

((

log(

10

10 ,,

min{

))

((

ii

P

M

ii

P

_{O_pre}_{O_pre} _{_}_{_} ₃₃

PL

ii

f

ii

P

_PUSCH_PUSCH == _CMAX_CMAX _PUSCH_PUSCH ++ ++∆∆_PREAMBLE_PREAMBLE _Msg_Msg ++ ++∆∆_TF_TF ++

C

Caatteeggoorryy PPaarraammeetteerr HHuuaawweeii VVaalluuee NNookkiiaa VVaalluuee EErriiccssssoonnss VaValluuee ZZTTEE VVaalluuee PUSCH /26

PUSCH /26 Power Control Power Control

 pr

 preamlemeamlem2626 [CellUlpcComm[CellUlpcComm]] #eltaPreamle/26 #eltaPreamle/26 9 9 )): : ddBB** [[LLNNCCEELL]] deltaPre/26 deltaPre/26 ,

, ))9 9 ddBB** [[PPoowweerrCCoonnttrroollUULL]] deltaPreamle/26 deltaPreamle/26

0 0

When L

(17)

UL

(18)

UL-PC: PUCCH

[ [

dBm

]]

ii

g

F

n

h

PL

j

P

ii

P

_PUCCH_PUCCH

((

))

=

min{

_MAX_MAX

,,

_{0_PUCCH}_{0_PUCCH}

((

))

+

((

_CQI_CQI

,,

_HARQ_HARQ

))

+

∆

_{F_PUCCH}_{F_PUCCH}

((

))

+

((

)}

P

_PUCCH_PUCCH

: PUCCH Power in subframe

i

P

_max_max

: max. allowed power

P

_{0_PUCCH}_{0_PUCCH}

(j) = P

_{0_NOMINAL_PUCCH}_{0_NOMINAL_PUCCH}

(j) + P

_{0_UE_PUCCH}_{0_UE_PUCCH}

(j)

P

_{0_NOMINAL_PUCCH}_{0_NOMINAL_PUCCH}

: cell specific (SysInfo)

P

: UE specific (RRC)

PL: p

athloss

[dB]

= referen

ceSignalPower

–

higher

layer

filtered

RSRP

H(n

_CQI,_CQI,

n

_HARQ_HARQ

))

•

• PUCCH format 1, 1a, 1b: h(n) = 0

PUCCH format 1, 1a, 1b: h(n) = 0

•

• PUCCH format 2, 2a, 2b and :

PUCCH format 2, 2a, 2b and :

h(n) = 0 if n

_CQI_CQI

< 4

h(n) = 10log

₁₀₁₀

(n

_CQI_CQI

/4)

/4) otherwise

otherwise

(here: normal CP, for extented CP also

(here: normal CP, for extented CP also n

n

_HARQ_HARQ

to be considered, n:number of information bits

))

∆

F_PUCCH

(F) : dFListPUCCH

(see next slide) (see next slide)

g(i): TPC (closed loop adjustment)

* For PUCCH higher degree of * For PUCCH higher degree of orthogonality could be assumed due orthogonality could be assumed due to the usage of the orthogonal to the usage of the orthogonal codes so

codes so alpha=1alpha=1(full(full compensation) compensation)

Compensation Factor for different Compensation Factor for different PUCCH formats

PUCCH formats

For example if format 1a (1ACK) is For example if format 1a (1ACK) is having offset 0 then format 1b having offset 0 then format 1b

p0NomPucch

Nominal Power for UE Nominal Power for UE PUCCH Tx Power Calculation PUCCH Tx Power Calculation LNCEL; -126..-96; 1;

(19)

de

lta

FL

is

tP

UC

CH

Pa

ra

me

ter

s

N

Naammee OObbjjeecctt AAbbbbrreevviiaattiioonn RRaannggee DDeessccrriippttiioonn DDeeffaauulltt DeltaF PUCCH

DeltaF PUCCH List

List

LNCEL

LNCEL dFListPucchdFListPucch nn//aa ddFFLLiissttPPuucccchh: : SSEEQQUUEENNCCE E ((sseee e vvaalluuees s bbeellooww)) nn//aa

DeltaF PUCCH DeltaF PUCCH Format 1 Format 1

LNCEL

LNCEL dFpucchF1dFpucchF1 --22, , 00, , 2 2 ddBB UUsseed d tto o dedeffiinne e tthhe e PPUUCCCCH H ffoorrmmaat t 11 0 0 ddBB

DeltaF PUCCH DeltaF PUCCH Format 1b Format 1b

LNCEL

LNCEL dFpucchF1bdFpucchF1b 11, , 33, , 5 5 ddBB UUsseed d tto o ddeeffiinne e tthhe e PPUUCCCCH H ffoorrmmaat t 11bb 1 1 ddBB

DeltaF PUCCH DeltaF PUCCH Format 2 Format 2

LNCE

LNCE dFpucchF2dFpucchF2 --22, , 00, , 11, , 2 2 ddBB UUsseed d tto o ddeeffiinne e tthhe e PPUUCCCCH H ffoorrmmaat t 22 0 0 ddBB

DeltaF PUCCH DeltaF PUCCH Format 2a Format 2a

LNCE

LNCE dFpucchF2adFpucchF2a --22, , 00, , 2 2 ddBB UUsseed d tto o ddeeffiinne e tthhe e PPUUCCCCH H ffoorrmmaat t 22aa 0 0 ddBB

DeltaF PUCCH DeltaF PUCCH Format 2b Format 2b

LNCEL

(20)

UL

PU

CCH P

owe

r Co

ntr

ol -

Par

ame

ter

)}

((

))

((

,,

n

h

,,

min{

))

((

ii

P

₀₀_{_}_{_}

PL

_CQI_CQI

n

_{_}_{_}

F

g

ii

P

_PUCCH_PUCCH

=

_CMAX_CMAX _PUCCH_PUCCH

+

_HARQ_HARQ

+

∆

_F_F _PUCCH_PUCCH

+

C

Caatteeggoorryy PPaarraammeetteerr HHuuaawweeii VVaalluuee NNookkiiaa VVaalluuee EErriiccssssoonnss VaValluuee ZZTTEE VVaalluuee

PUCCH Power PUCCH Power

Control Control

P0 no

P0 nominminal Pal PUCCHUCCH [Ce[CellUllUlpclpcComComm]m] P0NominalPUCCH P0NominalPUCCH

--,,00& & ddBBmm [[LLNNCCEELL] ] pp00NNoommPPuucccc!! --,,000 0 ddBBmm [[EEUUttrraannCCeellll""####]] p$eroNominalPucc! p$eroNominalPucc!

--77; ; ddBBmm [[PPoowweerrCCoonnttrroollUULL]] poNominalPUCCH poNominalPUCCH

-,0& dBm -,0& dBm Cl

Cloe Loe Loooop Swp Swititc!c! [C[CelellPlPc+c+l2l2o]o]

Pucc!CloeLoopPc<pe Pucc!CloeLoopPc<pe 0 0 )NUSEP0N )NUSEP0N /3N+LPUCCH* /3N+LPUCCH*  ""PPUUCCCCHH [[CCeellllUUllppccCCoommmm]] #elta"PUCCH"ormat, #elta"PUCCH"ormat, [CellUlpcComm] [CellUlpcComm] #elta"PUCCH"ormat, #elta"PUCCH"ormat, [CellUlpcComm] [CellUlpcComm] #elta"PUCCH"ormat9 #elta"PUCCH"ormat9 [CellUlpcComm] [CellUlpcComm] #elta"PUCCH"ormat9a #elta"PUCCH"ormat9a [CellUlpcComm] [CellUlpcComm] #elta"PUCCH"ormat9 #elta"PUCCH"ormat9 , )0 dB* , )0 dB* , )6 dB* , )6 dB* 9 ), dB* 9 ), dB* 9 )9 dB* 9 )9 dB* 9 )9 dB* 9 )9 dB* [LNCEL] d"pucc!", [LNCEL] d"pucc!", [LNCEL] d"pucc!", [LNCEL] d"pucc!", [LNCEL] d"pucc!"9 [LNCEL] d"pucc!"9 [LNCEL] d"pucc!"9a [LNCEL] d"pucc!"9a [LNCEL] d"pucc!"9 [LNCEL] d"pucc!"9 , )0 dB* , )0 dB* 0 ), dB* 0 ), dB* , )0 dB* , )0 dB* , )0 dB* , )0 dB* , )0 dB* , )0 dB* [PowerControlUL] [PowerControlUL] delta"Pucc!"ormat, delta"Pucc!"ormat, [PowerControlUL] [PowerControlUL] delta"Pucc!"ormat, delta"Pucc!"ormat, [PowerControlUL] [PowerControlUL] delta"Pucc!"ormat9 delta"Pucc!"ormat9 [PowerControlUL] [PowerControlUL] delta"Pucc!"ormat9a delta"Pucc!"ormat9a [PowerControlUL] [PowerControlUL] delta"Pucc!"ormat9 delta"Pucc!"ormat9 9 )9 dB* 9 )9 dB* , )6 dB* , )6 dB* 9 ), dB* 9 ), dB* 9 )9 dB* 9 )9 dB* 9 )9 dB* 9 )9 dB* 2)i*

-2)i* - Cloe Cloe LoopLoop Switc! Switc!

[Cell+l2oSwitc!] [Cell+l2oSwitc!] UlPc+

UlPc+l2oSl2oSwitcwitc!! >> 3nnerLoopPucc!Switc! 3nnerLoopPucc!Switc!



nn [[LLNNCCEELL] ] aaccttUUllppcc//eett!!oodd [LNCEL] ulpcLowle4Cc! [LNCEL] ulpcLowle4Cc! [LNCEL] ulpcUple4Cc! [LNCEL] ulpcUple4Cc! [LNCEL] ulpcLow5ualCc! [LNCEL] ulpcLow5ualCc! [LNCEL] ulpcUp5ualCc! [LNCEL] ulpcUp5ualCc! 6 6 )Puc!CLPucc!CL)Puc!CLPucc!CL** -,06 dBm -,06 dBm -78 dBm -78 dBm , , : : [PowerControlUL] [PowerControlUL] witc!"orCLPCo(PUCCH witc!"orCLPCo(PUCCH , , Period o( Power Period o( Power control control [CellPc+l2o] [CellPc+l2o] Pucc!PcPeriod Pucc!PcPeriod ,0 )900 m* ,0 )900 m* PUCCH uter Loop

PUCCH uter Loop Power Control Power Control

[Cell+l2oSwitc!] [Cell+l2oSwitc!] UlPc+

UlPc+l2oSl2oSwitcwitc!! --uterLoopPucc!Switc! uterLoopPucc!Switc!

,

(21)

UL

(22)

UL-PC: Control Scheme

Open loop: level based

Interference: considered by P

₀₀

values



not need for explicit signaling

RRC-BCCH

::

P

0_NOMINAL_PUSCH0_NOMINAL_PUSCH

, P

0_NOMINAL_PUCCH0_NOMINAL_PUCCH

,

, AL

ALPHA, deltaFListPUCCH, deltaPreambleMsg3

PHA, deltaFListPUCCH, deltaPreambleMsg3

Data

UE: PL

PDCCH

: DELTA_PUSCH, DELTA_PUCCH

M

PUSCHPUSCH

taken from scheduling grant

RRC-DCCH

: P

_{0_UE_PUSCH}_{0_UE_PUSCH}

, P

,,

DELTA_TF_ENABLED,

ACCUMULATION_ENABLED,

P_SRS_OFFSET, filterCoefficient

(23)

UL

(24)

UL-UL-

PC

:

Clo

sed

loo

p

-

PUS

CH

(exa

mpl

e)

Closed loop adjustments:

f(i) = f(i-1) +

δ

PUSCH

(

i

-

K

PUSCHPUSCH

)

i.e. recursive determination

or

f(i) =

δ

PUSCH

((i

i -- K

K

PUSCHPUSCH

))

i.e. absolute setting

where

δδδδδδδδ_PUSCH_PUSCH

_{is the signaled TPC in subframe i-K}

_PUSCH_PUSCH

For FDD:

For FDD: K

K

_PUSCH_PUSCH

= 4

whether the recursive or absolute method is used



parameter

parameter Accumulation-enabled

Accumulation-enabled

P (closed loop)

ulpcAccuEnable

PUSCH/PUCCH TPC commands PUSCH/PUCCH TPC commands accumulation enabled accumulation enabled Vendor Specific Vendor Specific

ulpcEnable

enable UL closed loop PC enable UL closed loop PC LNCEL; true, false; LNCEL; true, false; falsefalse

(25)

UL

-P

C: C

lo

se

d Lo

op -

Pr

oc

es

s

SIB/RRC parameters:

P0_NOMINAL_PUSCH, P0_UE_PUSCH, P0_NOMINAL_PUCCH,

P0_UE_PUCCH, ALPHA, deltaFLi

P0_UE_PUCCH, ALPHA, deltaFListPUCCH, DELTA_TF_ENABLED,stPUCCH, DELTA_TF_ENABLED,

ACCUMULATION_ENABLED, deltaPreambleMsg3,

P_SRS_OFFSET, filterCoefficient

Periodic reading of averaged level Periodic reading of averaged level and averaged SINR value (time and averaged SINR value (time constant adjustable) constant adjustable) Weighting Weighting

Comparison with Comparison with two-dimensiona

dimensiona l decision matrix.l decision matrix. Calculation of DELTA_ Calculation of DELTA_ PUSCH and DELTA_ PUSCH and DELTA_ PUCCH values for the UE PUCCH values for the UE Commanding DELTA_PUSCH Commanding DELTA_PUSCH Per UE measurements of Per UE measurements of

••receive power of wanted signalreceive power of wanted signal

••interfereninterferen ce ce and noiseand noise Calculation of average Calculation of average receive level per receive level per TTI.TTI. Calculation of SINR (two Calculation of SINR (two methods for I+N values) methods for I+N values) Transformation from Watt Transformation from Watt into dBm/dB domain. into dBm/dB domain.

Clipping using adjustable Clipping using adjustable parameters parameters Transformation into TF Transformation into TF independent format independent format

Long term filtering/averaging Long term filtering/averaging of level and SINR using of level and SINR using adjustable filter coefficients adjustable filter coefficients

time scale: TTI time scale: TTI

time scale: filter output time scale: filter output period (adjustable by period (adjustable by O&M) O&M) DELTA_TF_ENABLED, DELTA_TF_ENABLED, deltaFListPUCCH deltaFListPUCCH ENABLE_CLPC ENABLE_CLPC ENABLE_CLPC_PUSCH, ENABLE_CLPC_PUSCH, ENABLE_CLPC_SRS; ENABLE_CLPC_SRS; ENABLE_CLPC_PUCCH ENABLE_CLPC_PUCCH

SINR_MAX, SINR_MIN, RSSI_MAX, SINR_MAX, SINR_MIN, RSSI_MAX, RSSI_MIN

RSSI_MIN

WF_PUSCH_UE, WF_PUSCH_CELL, WF_PUSCH_UE, WF_PUSCH_CELL, WF_SRS_UE, WF_SRS_CELL, WF_PUCCH_UE, WF_SRS_UE, WF_SRS_CELL, WF_PUCCH_UE, WF_PUCCH_CELL WF_PUCCH_CELL UP_LEV_PUSCH_SRS, LOW_LEV_PUSCH_SRS,, UP_LEV_PUSCH_SRS, LOW_LEV_PUSCH_SRS,, LOW_LEV_UP_QUAL_PUSCH_SRS, LOW_LEV_UP_QUAL_PUSCH_SRS, LOW_QUAL_PUSCH_SRS, UP_LEV_PUCCHPUCCH, LOW_QUAL_PUSCH_SRS, UP_LEV_PUCCHPUCCH, UP_QUAL_PUCCH, LOW_QUAL_PUCCH, UP_QUAL_PUCCH, LOW_QUAL_PUCCH, minCumDeltaPUSCH, maxCumDeltaPUSCH, minCumDeltaPUSCH, maxCumDeltaPUSCH, minCumDeltaPUCCH, maxCumDeltaPUCCH minCumDeltaPUCCH, maxCumDeltaPUCCH TAVG_PUSCH_SRS_CONT, TAVG_PUSCH_SRS_CONT, TAVG_PUSCH_SRS_DISCONT, TAVG_PUSCH_SRS_DISCONT, TAVG_PUCCH_CONT, TAVG_PUCCH_CONT, TAVG_PUCCH_DISCONT TAVG_PUCCH_DISCONT FILTER_OUTPUT_PERIOD FILTER_OUTPUT_PERIOD

ulpcPucchEn

Including or excluding of RSSI Including or excluding of RSSI and SINR measurements from and SINR measurements from PUCCH in the Closed Loop PC PUCCH in the Closed Loop PC component

component LNCEL; true; LNCEL; true; truetrue

ulpcPuschEn

Including or excluding of RSSI Including or excluding of RSSI and SINR measurements from and SINR measurements from PUSCH in the Closed Loop PC PUSCH in the Closed Loop PC component

component LNCEL; true; LNCEL; true; truetrue

(26)

UL

-P

C: C

lo

se

d Lo

op -

Pr

oc

es

s

Averag

ed*

received level per TTI per UE:

•

• RSSI

RSSI

_PUSCH/UE_PUSCH/UE

•

• RSSI

RSSI

_PUCCH/UE_PUCCH/UE

•

• RSSI

RSSI

_SRS/UE_SRS/UE

relevant: PRBs allocated to the particular UE

Av

eraged*

received SINR per TTI per

UE:

Relevant

Relevant for

for PUSCH and

PUSCH and PUCCH:

PUCCH: (I+N)

(I+N)

_UE_UE

and (I+N)

_cell_cell

an

and fo

d for SR

r SRS:

S: (I

(I+N

+N))

_cell_cell

(I+N)

_cell_cell

: all potential PRBs

(I+N)

_UE_UE

: allocated PRBs to the

: allocated PRBs to the particular UE

particular UE

•

• SINR

SINR

_PUSCH/UE_PUSCH/UE

•

• SINR

SINR

_PUSCH/cell_PUSCH/cell

•

• SINR

SINR

_PUCCH/UE_PUCCH/UE

•

• SINR

SINR

_PUCCH/cell_PUCCH/cell

•

• SINR

SINR

_SRS/cell_SRS/cell

Measurements and Averaging

* linear, but

* linear, but converted to dBm, dB for furtherconverted to dBm, dB for further deployment

deployment

Transformation in independent format

•

∆∆_TF_TF

•

∆∆_{PF_PUCCH}_{PF_PUCCH}

•

• h(n)

h(n)

•

• P

P

_{O_UE_PUSCH}_{O_UE_PUSCH}

Normalization applies to:

UE and/or TF specific offsets get subtracted:

•

• PUSCH

PUSCH

•

• PUCCH

PUCCH

•

• SRS

SRS

(27)

UL

-P

C: C

lo

se

d Lo

op -

Pr

oc

es

s

Av

eraged

received SINR per TTI per

UE:

SINR

_***_***

:= min(max(SINR

_min_min

,SINR

_***_***

)SINR

_max_max

))

***

*** PUSCH/UE, PUSCH/cell, PUCCH/UE, PUCCH/cell, PUSCH/UE, PUSCH/cell, PUCCH/UE, PUCCH/cell, SRS/cellSRS/cell

Clipping

Weighting of MCS independent measurements

Averag

ed

received level per TTI per UE:

RSSI

_***_***

:= min(max(RSSI

_min_min

,RSSI

_***_***

)RSSI

_max_max

))

****** PPUUSSCCHH//UUEE,, PPUUCCCCHH//UUEE,, SSRRSS//UUEE

CELL CELL SRS SRS WF WF CELL CELL PUSCH PUSCH WF WF UE UE PUSCH PUSCH WF WF CELL CELL SRS SRS WF WF SINR SINR CELL CELL PUSCH PUSCH WF WF SINR SINR UE UE PUSCH PUSCH WF WF SINR SINR SINR SINR C

C PUSCH PUSCH SRS SRS PUSCH PUSCH UE UE PUSCH PUSCH cellcell SRS SRS cellcell

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ / / / / / / / / + + + + ⋅⋅ + + ⋅⋅ + + ⋅⋅ = =

UE

SRS

WF

UE

PUSCH

WF

UE

SRS

WF

RSSI

UE

PUSCH

WF

RSSI

C

_PUSCH_PUSCH _SRS_SRS PUSCH PUSCH UE UE SRS SRS UE UE

_

_/_/ / / / / + + ⋅⋅ + + ⋅⋅ = =

PUSC

PUSCH and

H and SRS -

SRS - comp

composite SIN

osite SINR and R

R and RSSI

SSI :

:

PUCC

PUCCH -

H - comp

composit

osite SINR a

e SINR and RS

nd RSSI

SI :

:

CELL CELL PUCCH PUCCH WF WF UE UE PUCCH PUCCH WF WF CELL CELL PUCCH PUCCH WF WF SINR SINR UE UE PUCCH PUCCH WF WF SINR SINR SINR SINR C

C PUCCH PUCCH UE UE PUCCH PUCCH cellcell PUCCH PUCCH _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ / / / / + + ⋅⋅ + + ⋅⋅ = = UE UE PUCCH PUCCH PUCCH

PUCCH

RSSI

C

(28)

UL

-P

C: C

lo

se

d Lo

op -

Pr

oc

es

s

Decision matrix for the Decision matrix for the PUSCH/SRS component PUSCH/SRS component of the CLPC algorithm of the CLPC algorithm RSSI

RSSIPUSCH/SRS,filteredPUSCH/SRS,filtered

DELTA_PUSCH DELTA_PUSCH

value value

SINR

SINR_{PUSCH/SRS,filtered}_{PUSCH/SRS,filtered}

Decision matrix for the Decision matrix for the PUCCH component of PUCCH component of the CLPC algorithm the CLPC algorithm RSSI

RSSI_{PUCCH,filtered}_{PUCCH,filtered}

DELTA_PUCCH DELTA_PUCCH

value value

SINR SINR_{PUCCH,filtered}_{PUCCH,filtered}

Filtering

x: input (composite RSSI, SINR) x: input (composite RSSI, SINR) y: output (filtered RSSI, SINR) y: output (filtered RSSI, SINR) n: step, max frequency = 1/TTI n: step, max frequency = 1/TTI

Low pass filter first order (exponential moving average)

Low pass filter first order (exponential moving average) :

:

))

((

))

1

1 ((

))

1

1 ((

))

((

n

cc

y

n

cc

x

n

y

=

⋅⋅

−

+

−

⋅⋅

c: filter coefficient c: filter coefficient c = exp(-T/T

c = exp(-T/T avg avg ) ) i.e. impact = (1/e) at t = -i.e. impact = (1/e) at t = -T T avg avg

Example: T = 1ms, T

Example: T = 1ms, T avg avg = 25 ms= 25 ms  c = 0.96 c = 0.96

ulpcReadPeriod

Time interval for sending averaged Time interval for sending averaged RSSI and SINR values to the decis RSSI and SINR values to the decisionion matrix to determine power corrections matrix to determine power corrections in Closed Loop uplink power control. in Closed Loop uplink power control. LNCEL; 10…2000ms; 10ms; LNCEL; 10…2000ms; 10ms; 50 ms50 ms

filterCoeff

Filter coefficient for RSRP Filter coefficient for RSRP measurements used to calculate measurements used to calculate pathloss. Value fc0 corresponds to k = pathloss. Value fc0 corresponds to k = 0, fc1 corresponds to k = 1, and so on. 0, fc1 corresponds to k = 1, and so on. LNCEL; fc0 (0), fc1 (1), fc2 LNCEL; fc0 (0), fc1 (1), fc2 (2), fc3 (3),(2), fc3 (3), fc4 (4), fc5 (5), fc6 (6), fc7 (7), fc8 (8), fc4 (4), fc5 (5), fc6 (6), fc7 (7), fc8 (8), fc9 (9), fc11 (10), fc13 (11), f fc9 (9), fc11 (10), fc13 (11), fc15 (12),c15 (12), fc17 (13), fc19 (14); fc17 (13), fc19 (14); fc4(4)fc4(4)

(29)

UL

(30)

UL

-P

C: C

lo

se

d Lo

op -

Pr

oc

es

s

LOW_QUAL_** LOW_QUAL_** UP_QUAL_** UP_QUAL_** LOW_LEV_** LOW_LEV_** 2 2 33 5 5 66 4 4 7 7 + 1 dB or + 1 dB or + 3 dB + 3 dB SINR SINR RSSI RSSI -1 dB -1 dB -- 11ddBB -- 11ddBB + 1 dB or + 1 dB or + 3 dB + 3 dB + 1 dB or + 1 dB or + 3 dB + 3 dB + 1 dB or + 1 dB or + 3 dB + 3 dB + 1 dB or + 1 dB or + 3 dB + 3 dB 0 dB 0 dB 8 8 99 UP_LEV_** UP_LEV_** 1 1

Decision matrix

ulpcUpqualSch

High Thresh. For SINR for PUSCH High Thresh. For SINR for PUSCH LNCEL; -47...80dB; 1dB ;

LNCEL; -47...80dB; 1dB ; 11dB11dB

ulpcUpqualCch

High Thresh. For SINR for PUCCH High Thresh. For SINR for PUCCH LNCEL; -47...80dB; 1dB ;

LNCEL; -47...80dB; 1dB ; 4dB4dB

ulpcLowqualSch

Low Thresh. For SINR for PUSCH Low Thresh. For SINR for PUSCH LNCEL; -47...80dB; 1dB ;

ulpcLowqualCch

Low Thresh. For SINR for

Low Thresh. For SINR for PUCCHPUCCH LNCEL; -47...80dB; 1dB ;

ulpcLowlevCch

Low Thresh. For RSSI f

Low Thresh. For RSSI for PUCCHor PUCCH LNCEL; -127...0dBm;1dBm ; LNCEL; -127...0dBm;1dBm ;-103dBm-103dBm

ulpcLowlevSch

ulpcUplevCch

High Thresh. For RSSI f

High Thresh. For RSSI for PUCCHor PUCCH LNCEL; -127...0dBm;1dBm ; LNCEL; -127...0dBm;1dBm ;-98dBm-98dBm

ulpcUplevSch

1dB 1dB 1dB 1dB Decision Decision whether to whether to +1dB or +3dB +1dB or +3dB

(31)

PRACH Power Control

(32)

LTE Uplink Power Control for PRACH

LTE PRACH power is calculated with following formula :

}

))

1

1 ((

,,

min{

_CMAX

_o

_{_}

_pre

_preamble

_pre

_step

PRACH

P

PL

N

P

=

+

∆

+

−

⋅⋅

∆

C

Caatteeggoorryy PPaarraammeetteerr HHuuaawweeii VVaalluuee NNookkiiaa VVaalluuee EErriiccssssoonnss VaValluuee ZZTTEE VVaalluuee P@+CH Power P@+CH Power Control Control P P00pprree [[@@++CCHHCC((22]] Pream3nit@c4ar2etPwr Pream3nit@c4ar2etPwr % )-,0; % )-,0; dBm* dBm* [LNCEL] [LNCEL] ulpc3niPrePwr ulpc3niPrePwr ,9 )-78 dBm*

,9 )-78 dBm* [EUtr[EUtranCelanCell"##]l"##]

preamle3nitial@ecei4edar2etPower preamle3nitial@ecei4edar2etPower -, -,,0 ,0 dBdBmm [P[Prarac!c!"#"##]#] preamle3ni@ecei4edPower preamle3ni@ecei4edPower ,0 )-,00 ,0 )-,00 dBm* dBm*   tteepp [[@@++CCHHCC((22]] Pwr@ampin2Step Pwr@ampin2Step , ) , )99ddBB** [[LLNNCCEELL]] prac!Pwr@amp prac!Pwr@amp , ,))99ddBB** [[PPrraacc!!""####]] power@ampin2Step power@ampin2Step , )9 dB* , )9 dB*

•

• The purpose of power control for the PRACH is t

The purpose of power control for the PRACH is to ensure

o ensure

the random access success rate while minimizing

the random access success rate while minimizing transmit

transmit

power

•

• The PRACH power is calculated using the following

The PRACH power is calculated using the following

formula:

(33)

Noia !L

Noia

!L-Noia !L-

-

-PC

PC

(34)

Nokia DL-PC

RL20: (static) cell power reduction

•

• based on single parameter CELL_PWR_RED = 0.0, 0.1 …

based on single parameter CELL_PWR_RED = 0.0, 0.1 … 10.0 dB

10.0 dB

•



cell size adjustment and coverage control

•

• flat Power Spectral Density (PSD)

flat Power Spectral Density (PSD)

•

• semi-static MIMO_COMP (if enabled)

semi-static MIMO_COMP (if enabled)

RL30: optional power boost: PCFICH, PHICH, DL RS

P

PS

SD

D

Frequency

PSD

PSD = (Max_= (Max_TX_PTX_Pwrwr –– CECELL_PWLL_PWR_R_REDRED) –) – 10*log10( 1210*log10( 12*# PRBs*# PRBs))

A

Alllloc

ocated

ated D

DL

L PR

PRB

Bs

s

P

PS

SD

D

Time

PS

PSD = (MaD = (Max_TXx_TX_Pw_Pwrr –– CECELL_PWLL_PWR_RR_REDED) –) – 10*log10( 12*# PR10*log10( 12*# PRBs)Bs)

PDCCH

P

PS

SD

D

Frequency

PSD

PSD = (Max_= (Max_TX_PTX_Pwrwr –– CECELL_PWLL_PWR_R_REDRED) –) – 10*log10( 1210*log10( 12*# PRBs*# PRBs))

A

Alllloc

ocated

ated D

DL

L PR

PRB

Bs

s

P

PS

SD

D

Time

PS

PSD = (MaD = (Max_TXx_TX_Pw_Pwrr –– CECELL_PWLL_PWR_RR_REDED) –) – 10*log10( 12*# PR10*log10( 12*# PRBs)Bs)

PDCCH

pMax

Maximum output power Maximum output power

LNCEL; 37.0 (0), 39.0 (1), 40.0 (2), 41.8 LNCEL; 37.0 (0), 39.0 (1), 40.0 (2), 41.8 (3), 43.0 (4), 44.8 (5), 46.0 (6), 47.8 (7); (3), 43.0 (4), 44.8 (5), 46.0 (6), 47.8 (7);- -37.0 dBm = 5 W 37.0 dBm = 5 W 39.0 dBm = 8 W 39.0 dBm = 8 W 40.0 dBm = 10 W 40.0 dBm = 10 W 41.8 dBm = 15 W 41.8 dBm = 15 W 43.0 dBm = 20 W 43.0 dBm = 20 W 44.8 dBm = 30 W 44.8 dBm = 30 W 46.0 dBm = 40 W 46.0 dBm = 40 W 47.8 dBm = 60 W 47.8 dBm = 60 W

dlCellPwrRed

Reduction of DL Tx power; deducted Reduction of DL Tx power; deducted from max. antenna TX power. from max. antenna TX power. LNCEL; 0..10; 0.1;

(35)

Nokia DL-PC: Power Reduction

Cell Power Reduction

PSD =

PSD = (pM

(pMax -

ax - CEL

CELL_PW

L_PWR_R

R_RED)

ED) -- 10*

10*log1

log10(

0( # PRB

# PRBs_D

s_DL *12

L *12) -

) - MIM

MIMO_C

O_COMP

OMP [dBm

[dBm]]

PSD: Power Spectral Density, which specifies the constant absolute Power

PSD: Power Spectral Density, which specifies the constant absolute Power per 15kHz Resource Element (RE)

per 15kHz Resource Element (RE)

•

• pMax: maximum eNodeB transmit power per Antenna in [dBm]

pMax: maximum eNodeB transmit power per Antenna in [dBm]

•

• C

CE

EL

LL

L_

_P

PW

WR

R_

_R

RE

ED

D::

O

O&

&M

M p

pa

arra

am

me

ette

err

•

• # PRBs_DL: maximum Number of downlink PRBs in

# PRBs_DL: maximum Number of downlink PRBs in given LTE Carrier Bandwidth

given LTE Carrier Bandwidth

•

• MIMO_COMP: Compensation Factor

MIMO_COMP: Compensation Factor

•

• MIMO_COM

MIMO_COMP = 0

P = 0 dB for SISO/SIMO

dB for SISO/SIMO

•

• MIMO_COM

MIMO_COMP =

P = 0...12 dB for MIMO Diversity and for MIMO Spatial

0...12 dB for MIMO Diversity and for MIMO Spatial Multiplexing

Multiplexing

-- PSD given pPSD given per antenna er antenna (RF amplifier (RF amplifier outputoutput)) -- PRBs noPRBs not schedult scheduled are blaed are blankednked

Applied to UE / cell specific channels and signals:

•

• PSD_CELL_CTRL for BCCH i.e. PBCH+PDSCH, PCFICH and P

PSD_CELL_CTRL for BCCH i.e. PBCH+PDSCH, PCFICH and PCH

CH

•

• PSD_CELL_RS for reference signals (RS) / pilots

PSD_CELL_RS for reference signals (RS) / pilots

•

• PSD_CELL_SYNC for

PSD_CELL_SYNC for synch

synchronization channel

ronization channel

•

• PSD_UE_PDSCH for UE specific part of PDSCH

PSD_UE_PDSCH for UE specific part of PDSCH

•

• PSD_UE_CTRL for PDCCH and PHICH

PSD_UE_CTRL for PDCCH and PHICH

dlCellPwrRed

Reduction of DL Tx power; deducted Reduction of DL Tx power; deducted from max. antenna TX power. from max. antenna TX power. LNCEL; 0..10; 0.1;

LNCEL; 0..10; 0.1; 0 dB0 dB

dlpcMimoComp

Determines the power Determines the power

compensation factor for compensation factor for antenna-specific maximum power in case specific maximum power in case of a downlink transmission using of a downlink transmission using at least two TX antennas at least two TX antennas LNCEL; 0..10; 0.01; LNCEL; 0..10; 0.01; 0 dB0 dB

(36)

Nokia DL-PC: DL power boosting for control channels

•

• Power offsets to the PCFICH, PHICH, DL RS.

Power offsets to the PCFICH, PHICH, DL RS.

•

• Introduced with RL30

Introduced with RL30

(LTE430).

•

• Better detection of PCFICH indicating the number of OFDM symbols for the P

Better detection of PCFICH indicating the number of OFDM symbols for the PDCCH.

DCCH.

•

• Better channel estimation in case of

Better channel estimation in case of RS boosting may improve HO

RS boosting may improve HO performa

performance.

nce.

•

• Higher reliability of ACK/NACK transmission via

Higher reliability of ACK/NACK transmission via PHICH.

PHICH.

RS

PCFICH

OFDM

symbols

The eNB ensures that total Tx power

The eNB ensures that total Tx power is not exceed, i.e.

is not exceed, i.e.

the sum power for any OFDM symbol must n

the sum power for any OFDM symbol must not exceed

ot exceed

the commited maximum power, otherwise all the

configured boosts (PHICH) may not be applied.

Subcarrier power boosting is only allowed if the excess

power is withdrawn from the remaining subcarriers.

Coverage in LTE is very often limited by UL, and in

such cases it does not make

such cases it does not make much sense to improve

much sense to improve

the coverage in DL. UL coverage should be checked

before applying DL control channels power boost.

(37)

Nokia DL-PC: DL power boosting for control channels

PCFICH power boosting

PCFICH provides information about the number of OFDM

PCFICH provides information about the number of OFDM symbols for the PDCCH.symbols for the PDCCH. The eNB supports dedicated power control settings for the PCFICH in order to The eNB supports dedicated power control settings for the PCFICH in order to ensure that especially cell

ensure that especially cell edge UEs can properly receive the edge UEs can properly receive the PCFICH.PCFICH.

A relative offset between the flat PSD (Power Spectral Density) on PDSCH and A relative offset between the flat PSD (Power Spectral Density) on PDSCH and PCFICH can be configured by O&M on cell level.

PCFICH can be configured by O&M on cell level.

PHICH power boosting

The PHICH provides ACK/NACK information for the upli

The PHICH provides ACK/NACK information for the uplink transmission.nk transmission.

The eNB supports dedicated power control settings for the PHICH in order to ensure The eNB supports dedicated power control settings for the PHICH in order to ensure that the UE can properly receive the PHICH.

that the UE can properly receive the PHICH.

PHICH power boost may not be (fully) applied if PDCCH PSD goes too low in

PHICH power boost may not be (fully) applied if PDCCH PSD goes too low in the first OFDM symbol. Inthe first OFDM symbol. In that case, the eNB rises t

that case, the eNB rises the PHICH Power Boost not applied warning.he PHICH Power Boost not applied warning.

A maximum relative offset between the flat PSD on PDSCH and PHICH can be

A maximum relative offset between the flat PSD on PDSCH and PHICH can be configured by O&M on cell level.configured by O&M on cell level.

Downlink reference signal boosting

The downlink reference symbols are used by the UE for The downlink reference symbols are used by the UE for channel estimation and cell measurements (Level, Quality) f

channel estimation and cell measurements (Level, Quality) for mobility.or mobility. The eNB supports relative RS / PDSCH power control settings. The eNB supports relative RS / PDSCH power control settings. A relative offset between the PDSCH and RS

A relative offset between the PDSCH and RS can be configured by O&M on cell le

can be configured by O&M on cell level.vel. The eNB ensures that total Tx power is not The eNB ensures that total Tx power is not exceed.exceed. The sum power for any OFDM symbol must not

The sum power for any OFDM symbol must not exceed the commited maximum power, otherwise all the configured boostsexceed the commited maximum power, otherwise all the configured boosts

dlRsBoost

Downlink RS transmission power Downlink RS transmission power boost boost LNCEL; 0dB (0), 1.77dB (1), 3dB LNCEL; 0dB (0), 1.77dB (1), 3dB (2), 4.77dB (3), 6dB (4); (2), 4.77dB (3), 6dB (4); 0 dB0 dB

dlPcfichBoost

Downlink PCFICH transmission Downlink PCFICH transmission power boost power boost LNCEL; 0..6; 0.1; LNCEL; 0..6; 0.1; 0 dB0 dB

dlPhichBoost

Downlink PHICH transmission power Downlink PHICH transmission power boost

boost

LNCEL; 0..6; 0.1; LNCEL; 0..6; 0.1; 0 dB0 dB