LTE Radio Parameters RL60 - Power Control-Nokia

LTE Ra LTE Radi dio o Param Paramet eters eter ers s RL60 RL6 RL60 0 Powe Po werr Co Cont ntro roll

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© Nokia Nokia Solution Solutions s and Networ Networks ks 2014

Module Objectives

After comletin! After comletin! t"is module# t"e articiant articiant s"ould $e a$le a$le to descri$e# desc ri$e# discuss discuss and anal%&e' anal%&e' ()rinc )rincile iles s of L*E L*E )+ (,L o oen en lo loo o )+ a art rt (,L clo closed sed loo loo  )+ ar artt (-L owe owerr setti settin!s n!s ()S()+ ima imacts cts on network network erfo erforman rmance ce ()ar )arame ameter ters s rel relate ated d to Gra Gracef ceful ul S"u S"utd tdown own

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© No kia SolSpectral utions anDensity d Networks 2014 PSD: Power

Module Contents (Overview (,L/)+'eriew (,L/)+'),S+ (,L/)+'),++ ,L/)+'+losedLoo ( ,L/)+'+losedLoo ( 3nterferenceaware 3nterferenceaware,Lowercontrol ,Lowercontrol 60 RL (-L/)+'RL0 (-L/)+')+on)-++ (Gracefu l+ellS"utdown l+ellS"utdown

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© Nokia Solutions and Networks 2014

Overview Objective 3mroe 3mr oe cell cell ed!e $e"a $e"aiour iour## redu reduce ce inter/cell inter/cell int interfer erference ence and and owe owerr con consum sumtion tion55 Downli Dow nlink nk (DL (DL)) -L Se Semi/ mi/sta static tic )ow )ower er Se Sett ttin! in! eNode eNo de8 8 !i !ies es f fed ed !o !owe werr de dens nsit it" " !e !err PR PR# # sc" sc"edu eduled led for tra trans nsort5 ort5 *ot otal al *9 o ower wer is ma9 ma955 w"e w"en n all )R8 )R8s s ar are sc" sc"edu eduled led No ada adati tie:d% e:d%nam namic ic ow ower er con control trol ;<= ; <= a ara rame mete ter> r> +e +ell ll )o )owe werr Red educ ucti tion on le lee ell ?0 ?055 5551 510@ 0@ d8 at atte tenu nuat atio ion n in 05 051 1 d8 st ste es s -L )o )owe werr +o +ont ntro roll on ))-++ ++ 

dlCellPwrRed Reduc Reduction tionfrom of DLmax. po wer; deducted deduc ted mTx ax.power; an antenna tenna TX power. LN!L; "..#"; ".#; 0 dB

$!link ($L $!link ($L)) Slow Slo w ,l ,link ink )ow )ower er +on +ontr trol ol / +o +om$ m$in inat atio ion n of oe oen n lo loo o )+ and and cl clos osed ed lo loo o )+ / O!e O!en O!en n Loo! Loo! Pow Power er Con Contro Contr trol oll (OLPC) (OLPC) •+al +alcu culat lated ed at t" t"e e ,E $a $ased sed on a at" t"los loss s measur measureme ement nts s / Cl Clos osed ed Lo Loo! o! Po Powe werr Co Cont ntro roll (C (CLP LPC) C) •8as 8ased ed on e9c e9c"a "an! n!e e of fee feed$ d$ac ack k da data ta an and d co comma mmand nds s $et $etwee ween n ,E an and d eNo eNode8 de8 •S S/li /licen censed sed en" en"an ancem ceme ent ;ca ;can n $e swi switc tc"e "ed d on an and d oB>

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Module Contents (eriew ($L%PC&Over $ L % P C & O v e rview vie w (,L/)+'),S+ (,L/)+'),++ ( ,L/)+'+losedLoo (3nterferenc eaware,LowercontrolRL60 Loo ( (-L/)+ (-L/)+')+on)-++ (Gracef ul+ellS"ut down

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UL-PC: Overv Overview iew LT!: ort$o%onal &L Tx' i.e. near(far(pro)lem muc$ less se*ere t$an +D,-  • &L: dynamic' slow P  /pen Loop 0/L1 2 losed Loop 0L1 • need for PL 3 s$adowin% etc. compensation  /L P • need for correction3 ad4ustments of e.%. open loop inaccuracies  L P Si%nal stren%t$ S: Depends on PL' indoor loss etc.' i.e. location

6e r y

5nterference 051 ( main cause: inter(cell

Low lo w

7i%$

6 e r y $ i % $

Noise 0N1 < 9 T ∆f = N>eN9

Power control does not control t$e a)solute &! Tx power )ut t$e Power Spectral Density 0PSD1' power per 78' for a de*ice.T$e PSDs at t$e eNode9 from different users $a*e to )e close to eac$ ot$er so t$e recei*er doesnt wor o*er a lar%e ran%e of powers. Different data rates mean different Tx )andwidt$s so t$e a)solute Tx power of t$e &! will also c$an%e. P maes t$at t$e PSD is constant independently of t$e Tx )andwidt$.

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Overview Proced're or low $L Power Control / ,E controls t"e *9 ower to kee t"e transmitted !ower s!ectral densit" (PD) constant indeendent of t"e allocated transmit $andwidt" ;)R8s> / 3f no feed$ack from eNode8 ; in t"e )-++ ,L )+ command> t"e ,E erforms oen loo )+ $ased on at" loss measurements / 3f feed$ack from eNode8 t"e ,E corrects t"e )S- w"en receiin! )+ commands from eNode8 ; in t"e )-++ ,L PC command> command / )+ commands ;u and down> $ased on ,L Fualit% and si!nal leel measurements / *!!lied se!aratel" or P$C+, P$CC+ / Scoe of ,L )+ is ,E leel ; erformed searatel% for eac" ,E in a cell>

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Module Contents (eriew (,L/)+'eriew ($L%PC&P$C+ (,L/)+'),++ ,L/)+'+losedLoo ( ( 3nterferenceaware,LowercontrolRL60 (-L/)+'RL0 (-L/)+')+on)-++ (Graceful+ellS"utd own

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O&en Loo& (OL)

UL-PC: PUSCH

Closed Loo& (CL)

PPUSCH (i ) = min { PCMAX ,10 log10 ( M PUSCH (i )) + PO_PUSCH ( j ) + α ( j ) ⋅ PL + ∆ TF (i ) + f (i )} [ dBm ] PH ( i ) = PCMAX + PO_PUSCH ( j ) + α ⋅ PL + ∆ TF (i ) + f (i ) } [ dB ] − { 10 log10 ( M PUSCH (i )) PPUSCH (i) :PUSCH Power in subr!"e i PCM#$: max. allowed &! power 0?@ d9m for class @1 MPUSCH: num)er of sc$eduled R9s 0T$e &! Tx. Power increases proportionally to A of PR9s1 PO%PUSCH(j) < P/BN/,5N-LBP&S7041 =

041

P/B&!BP&S7

PL: &!t'loss dB * reerenceS reerenceSi+n!lPower i+n!lPower , 'i+'er l!er l!er iltered iltered RSRP ∆T>

0i1 < #" lo% #" 0?,PR Cs  #1 for Cs < #.? else "' ,PR < T9S3NR!' NR! : num)er of R!

Cs defined )y deltaMCS-Enabled' deltaMCS-Enabled &! specific

(i): .PC (Closed Loo& !djust"ent) Se"i-&ersist!nt: j*0 / dn!" dn!"ic ic sc'edulin+: j* P/BN/,5N-LBP&S70"'#1: cell specific 0Sys5nfo1 P/B&!BP&S70"'#1: &! specific 0RR1 α

0"'#1 < "."' ".E' ".' ".F' ".G' ".H' ".I' #." 0partial PL compensation )y open loop1 R!ndo" !ccess +r!nt: j*1 P/BN/,5N-LBP&S70?1: P/BPR! = ∆Pream)leB,s%@ P/B&!BP&S70?1 < " α

0?1 < #." 0i.e. full PL compensation1 JP7 < Power 7eadroom

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O&en Loo& PC vs2 Closed Loo& PC O&en Loo& Power Control Tar%et: pro*ide a )asic operatin% point for a suita)le PSD for an !ver!+e MCS (!ver!+e S34R):

Basic _ Operating _ Po int

=

PO_PUSCH ( j ) + α ( j ) ⋅ PL

•

/pen Loop Power ontrol taes into account effects lie inter(cell interference and s$adowin%

•

9ased on PL 0Pat$loss1

Closed Loo& Power Control (i) !djust"ents Tar%et: >ine tunin% around t$e )asic operatin% point • -dapt dynamically to t$e c$annel conditions 0tae into account e.%. fast fadin%1 •

orrect t$e estimations of power from t$e open loop P PSD: Power Spectral Density

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O&en Loo& PC

PPUSCH (i ) = min { PCMAX ,10 log10 ( M PUSCH (i )) + PO_PUSCH ( j ) + α ( j ) ⋅ PL + ∆ TF (i ) + f (i )} [ dBm ] )0G),S+2;H> I )0GN0=3NALG),S+2;H> J )0G,EG),S+2;H> HI0 /K ),S+ transmission wit" semi/ersistent !rant ;not in RL.0> HI1 /K ),S+ transmission wit" d%namic sc"edulin! HI2 /K ),S+ transmission for random access !rant )0GN0=3NALG),S+2;H> /K cell secic comonent si!naled from s%stem information for HI0# 1 *"is term is a common ower leel for all mo$iles in t"e cell ;used to control S3NR> &04o"Pusc' Nominal Power for &! P&S7 Tx Power alculation LN!L; (#?F..?Ed)m; #; -50 dB"

)0G,EG),S+2;H> /K ,E secic comonent roided $% "i!"er la%ers ;RR+> for HI0#1 *"is term is a ,E secic oBset used to correct t"e errors from t"e estimation of t"e at"loss5 p"NomPusc$ ( T$is parameter defines t$e &!(specific nominal power for t$e P&S7. &sed for P"BP&S7 calculation in &! uplin power control eKuation 0P#1 for controllin% t$e mean recei*ed SNR for user data durin% 0re1transmission correspondin% to a recei*ed PD7 wit$ D5 format " associated wit$ a new pacet transmission. T$is parameter is used to control mean recei*ed SNR for user data .

1

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PUSCH 6or"ul!

PPUSCH (i ) = min { PCMAX ,10 log10 ( M PUSCH (i )) + PO_PUSCH ( j ) + α ( j ) ⋅ PL + ∆ TF (i ) + f (i )} [ dBm ] PL: &!t'loss dB dB * reerenceS reerenceSi+n!lPower i+n!lPower , 'i+'er l!er iltered RSRP

T$is pat$ loss compensation factor a is ad4usta)le )y /2,. 7 is a cell ( specific parameter 0)roadcasted on 971.

#l&'!

7 ∈ "."' ".E' ".' ".F' ".G' ".H' ".I' 20M 20 7 * 0 8 no co"&ens!tion 7 *  8 ull co"&ens!tion ul&c#l&'! LN!L; "' ".E..#."; ".#; 20

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7 9  0 8 ; 8 r!ction!l co"&ens!tion


Convention!l < 6r!ction!l PC ( Conventional PC sc-emes& sc-emes& • Attemt to maintain a constant S3NR at t"e receier • ,E increases t"e *9 ower to full% comensate for increases in t"e at" loss / .ractional PC sc-emes& • Allow t"e receied S3NR to decrease as t"e at" loss increases5 • ,E *9 ower increases at a reduced rate as t"e at" loss increases5 3ncreases in at" loss are onl% artiall% comensated5 • /1& /1& 3mroe air interface eMcienc% < increase aera!e cell t"rou!"uts$% reducin! 3nter/cell interference / G)) secies fractional ower control for t"e ),S+ wit" t"e otion to disa$le it < reert to conentional&L$ased on  >ractional Power &L S5NR S5NR ontrol:  O  " '#Q on*entional Power 5f Pat$ Loss ontrol: <# &!Tx increases )y #" d9 5f Pat$ Loss increases )y #" d9 t$e &! Tx power increases )y #" d9

1.

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Power

&!Tx Power

t$e &! Tx power increases )y  #" d9


MCS de&endent co"&onent

PPUSCH (i ) = min { PCMAX ,10 log10 ( M PUSCH (i )) + PO_PUSCH ( j ) + α ( j ) ⋅ PL + ∆ TF (i ) + f (i )} [ dBm ] ∆ TF (i ) = 10 log10 ( 2

MPR ∗ K s

"

− 1)

for

K S

=

/t$erwise

1.25 delt!.=n!bled !na)led TB size (MCS) impact to &! P&S7 power calculation LN!L; false "' true #-- !lse

MPR * .BS/4R= wit$ NR! : num)er of R!' T9S < Transport 9loc Si8e

• • •

T> < Transport >ormat Cs ( !na)lin%3disa)lin% of t$e transport format dependent offset on a per &! )asis

•

ould )e seen as dynamic offset of t$e TX power: w$en t$e 9TS c$an%es t$e ,S for t$e &! t$en t$e &! indirectly may adapt t$e power

•

5ncrease t$e power if t$e Transport >ormat 0,S' T9S si8e' Num)er of Resource 9locs1 it is so selected to increase t$e num)er of )its per Resource !lement

5f t$is parameter is ena)led' P&S7 power calculation in &! uplin power control eKuation taes t$e Transport 9loc si8e in account durin% t$e power calculation

16

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Module Contents (eriew (,L/)+'eriew (,L/)+'),S+ ($L%PC&P$CC+ ,L/)+'+losedLoo ( ( 3nterferenceaware,LowercontrolRL60 (-L/)+'RL0 (-L/)+')+on)-++ (Graceful+ellS"utd own

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UL-PC: PUCCH

PPUCCH (i ) = min{ PMAX , P0_PUCCH

+ PL + h ( n CQI , n HARQ ) + ∆ F_PUCCH ( F ) + g (i )}

[ dBm ]

PPUCCH: PUCCH Power in subr!"e i Pmax: max. allowed power P"BP&7 < P"BN/,5N-LBP&7 = P"B&!BP&7

&04o"Pucc' Nominal Power for &! P&7 Tx Power alculation LN!L; (#?F..(IF; #; -->dB

P"BN/,5N-LBP&7 : cell specific 0Sys5nfo1 P"B&!BP&7 : &! specific 0RR1 PL: &!t'loss dB * reerenceSi+n!lPower , 'i+ 'i+'er 'er l!er iltered RSRP J >or P&7 $i%$er de%ree of ort$o%onality could )e assumed

70n n 1 • P&7 format #' #a' #): $0n1 < " 5'

7-R

due to t$e usa%e of t$e ort$o%onal codes so !l&'!* 0full compensation1

• P&7 format ?' ?a' ?) and : $0n1 < " if n 5  E $0n1 < #"lo%#" 0n53E1 ot$erwise 0$ere: normal P' for extended P also n7-R to )e considered' n:num)er of information )its 1 6%PUCCH

(6) : d6ListPUCCH

0see next slide1

ompensation >actor for different P&7 formats

+(i): .PC (closed loo& !djust"ent)

>or example if format #a 0#-C1 is $a*in% offset " t$en format #) 0?-C1 could $a*e offset @d9

1C

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delt!6ListPUCCH P!r!"eters

1D

4! "e

Ob jeec ct

#bbr re ev i !t i o n

Delta> P&7 List

LN!L

d>ListPucc$

n3a

Delta> P&7 >ormat #

LN!L

d>pucc$>#

(?'"'?d9

&sedto define t$eP&7format#

"d9

Delta> P&7 >ormat #)

LN!L

d>pucc$>#)

#' @'  d9

&sed to define t$e P&7format#)

#d9

Delta> P&7 >ormat ?

LN!

d>pucc$>?

(?' "' #' ? d9

&sed to define t$e P&7format?

" d9

Delta> P&7 >ormat ?a

LN!

d>pucc$>?a

(?' "' ? d9

&sed to define t$e P&7format?a

" d9

Delta> P&7 >ormat ?)

LN!L

d>pucc$>?)

(?' "' ? d9

&sed to define t$e P&7format?)

" d9

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R! n +e

?es cr ri i& ti o n d>ListPucc$:S!&!N! 0see *alues )elow1


?e  ! !u lt n3a

Module Contents (eriew (,L/)+'eriew (,L/)+'),S+ (,L/)+'),++ $L%PC& ClosedLoo! ( $L%PC& ClosedLoo! ( 3nterferenceaware,Lowercontrol 60 RL (-L/)+'RL0 (-L/)+')+on)-++ (Gracefu l+ellS"utdown

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UL-PC: Closed loo& - PUSCH (e@!"&le)

Closed loo& !djust"ents: (i) * (i-) A

PUSCH

(i - PUSCH)

i.e. recursi*e determination

or

(i) * w$ere

PUSCH PUSCH

(i - PUSCH) i.e. a)solute settin%

is t'e si+n!led .PC in subr!"e i- PUSCH

>or >DD: PUSCH * 

P (closed loo&)

t

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UL-PC: Closed Loo& - Process dB

ul&cU&Du!lSc' 7i%$ T$res$. >or S5NR for P&S7 LN!L; (EG...H"d9; #d9 ; 10dB

Decision matrix

ul&cU&Du!lCc' 7i%$ T$res$. >or S5NR for P&7 LN!L; (EG...H"d9; #d9 ; 1dB

dB Decision w$et$er to =#d9 or =@d9

ul&cLowDu!lSc' Low T$res$. >or S5NR for P&S7 LN!L; (EG...H"d9; #d9 ; 0dB ul&cLowDu!lCc' Low T$res$. >or S5NR for P&7 LN!L; (EG...H"d9; #d9 ; (#dB dB

22

ul&cLowlevCc' Low T$res$. >or RSS5 for P&7 LN!L; (#?G..."d9m;#d9m ;--5dB"

ul&cU&levCc' 7i%$ T$res$. >or RSS5 for P&7 LN!L; (#?G..."d9m;#d9m ;--EdB"

ul&cLowlevSc' Low T$res$. >or RSS5 for P&S7 LN!L; (#?G..."d9m;#d9m ;--0EdB"

ul&cU&levSc' 7i%$ T$res$. >or RSS5 for P&S7 LN!L; (#?G..."d9m;#d9m ;--55dB"

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Module Contents (eriew (,L/)+'eriew (,L/)+'),S+ (,L/)+'),++ $L%PC& ClosedLoo! ( $L%PC& ClosedLoo! ( 2nter 2nter erenceaware$L!owercontrolRL60 e renceaware$L!owercontrolRL60 (-L/)+'RL0 (-L/)+')+on)-++ (Gracefu l+ellS"utdown

2

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RL>0

2ntererence aware $L !ower control

L*E16 otimi&es tradeoB $etween t"e t"rou!"ut ac"ieed in t"e own cell and t"e ulink interference inHected to nei!"$or cells ,L ower control is trade%o3 $etween inter%cell intererence and own cell t-ro'4-!'t

UL &ower-control dile""!

/ 3ncrease of ,L ower $rin!s additional useful si!nal for own cell ,Es# $ut adds additional interference for nei!"$orin! cells / Reduction of ,L ower decrease useful si!nal $ut also lowers t"e interference 2ntererence%aware $LPC ;2*wPC 2ntererence%aware 2*wPC> feature uses ,L closed/loo ower control t u p $ % u o r $ T

L.=EE> M!@i"iGed U= t'rou+'&ut wit' &ro&ortion!l !ir sc'eduler 3"&roved !ver!+e !nd cell-ed+e t'rou+'&ut Bre!F&oint

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&L power

RL>0

2ntererence aware $L !ower control

wn cell

= (

wn ,E

)own #)L

DL 25R

25R Tar4et

-L +O3

Power command

t"er cells )ot"er #)L

,L 3nterfer ence

,L Si!nal RSS3

$L 25R

!xistin% closed loop al%orit$m 2.

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,L 3nterferenc e

RL>0

LTE776& 2ntererence aware $L !ower control 25R tar4et orm'la adj'stment *"e 25RTar4et formula "as t"ree !arameters w"ic" allow for al!orit"m $e"aiour adHustment' /

L5CEL&'l!cRePwr2*w - roides an eFual s"ift of *ar!et S3NR for all ,Es in t"e cell# re!ardless of t"eir at"loss ratios (dea'lt %80 d#m)

/

L5CEL&'l!cCE#alance2*w - "i!"er alues increase cell/center t"rou!"ut at t"e cost of cell/ed!e t"rou!"ut# and ice ersa (dea'lt )

/

L5CEL&'l!c9in:'al2*w – denes t"e minimum tar!et S3NR for er% small at"loss ratios5 (dea'lt linear  0d#)

ul&cRePwr3# Ref &L power for 5-&L P

ul&cC=B!l!nce3#w ell(center3ed%e )alancin% for 5- &L

ul&cMinu!l3#w ,in &L Kual for 5- &LP

LN!L; (##"...(G"d9m; ".d9m; -I0dB"

P LN!L; "....#.E; ".#; 

LN!L; "...' step ".?; 

w # 3r w P  e R c & l u

t e r+ ! .

t e + r ! .

R 4 3 S

Slope =#= ul&cC=B!l!nce3#w

l3# w ul&cMinHu! Decre as i n% s i nr

DL

w 3# r w P e R c & l u

R 4 3 S

ul&cC=B!l!nce3#w= ul&cC=B!l!nce3#w 1 Slope = 0

w ul&cMinHu!l3# Decre Cell-ed+e as i n% s i nr

Cell-ed+e

DL

26

RA41217EN60GLA0


RL>0

LTE776& 2ntererence aware $L !ower control

S3NR tar!et is calculated er ,E $asis and it "as redened $oundaries +ell/ed!e ,Es are allowed a minim'm 25R een if t"e% create e9cessie interference ;more t"at would $e allowed $% at"loss ratio> / -ened $% Q min LNCEL:ulpcMinQualIAw# determines t"e lower limit for I LNCEL:ulpcMinQualIAw S3NR*ar!et in linear scale

9aim'm 25R ; sinr > is t"e uer limit for S3NR*ar!et and indicates t"e S3NR reFuired to ac"iee t"e "i!"est allowed =+S in ,L max

/ 3ts alue deends on t"e eN8 con!uration

ul&cMinu!l3#w ,in &L Kual for 5- &LP LN!L; "...' step ".?; 

-enest"e e9tent to w"ic" cell/ed!e ,Escan $e toned down to reduce interference into nei!"$or cells ;also t"e e9tent to w"ic" t"eir ,L t"rou!"ut is reduced>

,imimum S5NR

-enes ma9imum S3NR w"ic" is reFuired to ac"iee t"e "i!"est allowed=+S in ,L

S34R%.!r+et

Cell-ed+e

27

,aximum S5NR

RA41217EN60GLA0

Cell-center

S5NR d9mM


LTE776& 2ntererence aware $L !ower control 9aim'm 25R (sinr ) calc'lation

RL>0

max

25R;tar4et calculation considers additional mar!in so t"at ,Es can successfull% transmit wit" t"is -i4-est allowed 9C ;ma9Allowed=cs> / *"e "i!"est allowed =+S in ,link# can $e found from t"e arameter 9C0 9C<0# 9C<0 or actModulationSchemeUL # w"ic" restricts it to eit"er 9C0# 9C<= /

it" LTE44 64 QAM in UL# ma9Allowed=cs is 9C<> 9C<> for *--

eN8 kees a static ta$le ;from real c"annel estimates> of =+S s5 reFuired S3NR main!# called Pideal S3NRP# for =+S K . /

S3NR=a9=cs is t"e S3NR t"at corresonds to ma9Allowed=cs in t"is ta$le

/ *"e ta$le of is $ased on a least/sFuare linear t erformed on t"e simulation result for an E*,70 cell# at 2. )R8 allocation si&e# 2 antennas# S3NR I 05D1. Q =+S /.5D0D

Deviations between t-e ?ideal 25R@ table and feld !erormance ;due to e5!5 diBerent con!uration# of antennas or c"annel c"aracteristics> are coered durin! 25Rdelta calculation S3NR=a9=cs is calculated for eac" ),S+ transmission t"at uses an =+S in t"e available ran4e ;.  =+S I ma9Allowed=cs  1>

2C

RA41217EN60GLA0


"!@#llowedMcs

S34RM!@Mcs

LTE776& 2ntererence aware $L !ower control Decisions on Power%'!Adown Commands& calc'lation

RL>0

*"e )+ decision ;t"e content of t"e ower command> is constructed from a runnin! sum of diBerence alues $etween meas'red $L 25R and calc'lated 25R;T 25R;Tar4et ar4et w"ic" is udated in eac" **3

Diference = SINR_Target - UL SINR

*"e followin! constrains s"ould $e noted / /

nl% **3s wit" detected ;i5e5# non/-*T> ),S+ transmission are considered Uor ,Es in **3 8undlin! mode# no ower commands are sent

*"en t"e diBerence is comared to t"e decision arra%'

Power co""!nd

-dB

?ierence

0dB -02J

"

AdB 02J

#

AE dB

RSSIAvg + !B ≦ ulpcRssiMaxIAw

- dB

RSSIAvg > ulpcRssiMaxIAw

1

UL S34R *s S34R%.!r+et difference

2D

RA41217EN60GLA0


RL>0

LTE776& 2ntererence aware $L !ower control Decisions on Power%'!Adown Commands& tri44erin4

),S+ ower commands are sent at times t"at are determined $% t"e two arametersV / n'mber o o P$C+ transmissions transmissions t"at occurred ater t-e last command •

ardcoded to  recetions and

/ t"e time di3erence rom t-at last ),S+ ower command transmission •

Secied $% t"e arameter ulpcMinWaitForPc ulpcMinWaitForPc ;default .0 ms>

ulpcMinWaitForPc **3s "ae elased since t"e last suc" decision

ulpcMi"#ait$%&'c

>ull 9uffer &! @ TT5s

0

RA41217EN60GLA0

-ND

*"e num$er of ),S+ recetions ;,L S3NR samles> since t"e last decision is "i!"er or eFual to 

"TT5s

Tri44e r .i"e (..3s)

ul&cMinK!it6orPc ,inimum waitin% time for next &L(P decision LN!L; F...H" TT5; #; 1J ..3


Module Contents (eriew (,L/)+'eriew (,L/)+'),S+ (,L/)+'),++ ,L/)+'+losedLoo ( ( 3nterferenceaware,LowercontrolRL60 (DL%PC&RL70 DL%PC&RL70 (-L/)+')+on)-++ (Graceful+ellS"utd own

1

RA41217EN60GLA0


?L-PC RL10: (st!tic) cell &ower reduction • )ased on sin%le parameter !LLBP+RBR!D < "."' ".#  ?"." d9 •



cell si8e ad4ustment and co*era%e control

&M!@ ,aximum output power LN!L; @G." 0"1' @I." 0#1' E"." 0?1' E#.H 0@1' E@." 0E1' EE.H 01' EF." 0F1' EG.H 0G1;-#"."d9m < #" m+ @G."d9m <  + @I."d9m < H + E"." d9m < #" + E#.H d9m < # + E@." d9m < ?" + EE.H d9m < @" +

• flat Power Spectral Density 0PSD1 • semi(static ,5,/B/,P 0if ena)led1 RLE0: o&tion!l &ower boost: PC63CH8 PH3CH8 ?L ?L RS RS

PSD

dlCellPwrRed Reduction of DL Tx power; deducted from max. antenna TX power. LN!L; "..?"; ".#; 0 dB

PSD

EF." EG.H d9m d9m < < E" F" + + EI." d9m < H" + PSD < 0,axBTXBPwr . !LLBP+RBR!D1 . #"Jlo%#"0 #?JA PR9s1

#lloc! #lloc!ted ted ?L PR PRBs Bs

>reKuency

?L Pilots 2

RA41217EN60GLA0

PSD < 0,axBTXBPwr . !LLBP+RBR!D1 . #"Jlo%#"0 #?JA PR9s1

P?CCH

Time

P?SCH8 PCH BCH8 SCH © Nokia Solutions and Networks 2014

?L-PC: Power Reduction Cell Power Reduction PSD < 0p,ax ( !LLBP+RBR!D1 ( #"Jlo%#"0 A PR9sBDL J#?1 ( ,5,/B/,P d9mM

PSD: Power Spectral Density' w$ic$ specifies t$e constant a)solute Power &er &er JFHG Resource =le"ent (R=) • p,ax: maximum eNode9 transmit power per -ntenna in d9mM •  !LLBP+RBR!D:

/2, parameter

• A PR9sBDL: maximum Num)er of downlin PR9s in %i*en LT! arrier 9andwidt$ • ,5,/B/,P: ompensation >actor dl&cMi"oCo"& Determines t$e power factor for • MIMCM' = *1 !B %& MIM .ive&sit/ a"! %& MIM Spatial Multiplexi"g compensation antenna(specific maximum power in case of a downlin - PSD given per antenna (RF amplifier output transmission usin% at least two - PR!s not sc"eduled are blan#ed TX antennas LN!L; "..#"; "."#; 0 dB

• MIMCM' = * !B %& SIS,SIM

#&&lied to U= / cell s&eciic c'!nnels !nd si+n!ls:

• PS?%C=LL%C.RL or BCCH i2e2 PBCHAP?SCH8 PBCHAP?SCH8 PC63CH !nd PCH • PS?%C=LL%RS or reerence si+n!ls (RS) / &ilots • PS?%C=LL%S4C or or snc'roniG!tion snc'roniG!tion c'!nnel • PS?%U=%P?SCH or U= s&eciic &!rt o o P?SCH

dlCellPwrRed Reduction of DL Tx power; deducted from max. antenna TX power. LN!L; "..?"; ".#; 0 dB

• PS?%U=%C.RL or P?CCH !nd PH3CH



RA41217EN60GLA0


?L-PC: ?L &ower boostin+ boostin+ or or control control c'!nnels • Power osets to t'e PC63CH8 PH3CH8 ?L RS2 • 3ntroduced wit' RLE0 ($%E&') • 9etter detection of P>57 indicatin% t$e num)er of />D, sym)ols for t$e PD7. • 9etter c$annel estimation in case of RS )oostin% may impro*e 7/ performance. • 7i%$er relia)ility of -C3N-C transmission *ia P757.

P>57 />D, sym)ols

T0e eB e"su&es t0at t%tal Tx p%we& is "%t excee!2 ie t0e sum p%we& %& a"/ $.M s/m3%l must "%t excee! t0e c%mmitte! maximum p%we&2 %t0e&wise all t0e c%"igu&e! 3%%sts ('4IC4) ma/ "%t 3e applie! Su3ca&&ie& p%we& 3%%sti"g is %"l/ all%we! i t0e excess p%we& is wit0!&aw" &%m t0e &emai"i"g su3ca&&ie&s C%ve&age i" 5T6 is ve&/ %te" limite! 3/ 752 a"! i" suc0 cases it !%es "%t ma8e muc0 se"se t% imp&%ve t0e c%ve&age i" .5 75 c%ve&age s0%ul! 3e c0ec8e! 3e%&e appl/i"g .5 c%"t&%l c0a""els p%we& 3%%st RS />D, sym)ols 4

RA41217EN60GLA0


?L-PC: ?L &ower boostin+ boostin+ or or control control c'!nnels dlPcic'Boost

PC63CH &ower boostin+ P>57 pro*ides information a)out t$e num)er of />D, sym)ols for t$e PD7. T$e eN9 supports dedicated power control settin%s for t$e P>57 in order to ensure t$at especially cell ed%e &!s can properly recei*e t$e P>57. - relati*e offset )etween t$e flat PSD 0Power Spectral Density1 on PDS7 and P>57 can )e confi%ured )y /2, on cell le*el.

PH3CH &ower boostin+ T$e P757 pro*ides -C3N-C information for t$e uplin transmission. T$e eN9 supports dedicated power control settin%s for t$e P757 in order to ensure t$at t$e &! can properly recei*e t$e P757. P757 power )oost may not )e 0fully1 applied if PD7 PSD %oes too low in t$e first />D, sym)ol. 5n t$at case' t$e eN9 rises t$e P757 Power 9oost not applied warnin%. - maximum relati*e offset )etween t$e flat PSD on PDS7 and P757 can )e confi%ured )y /2, on cell le*el.

Downlin P>57 transmission power )oost LN!L; "..F; ".#; 0 dB

dlP'ic'Boost Downlin P757 transmission power )oost LN!L; "..F; ".#; 0 dB

?ownlinF reerence si+n!l boostin+ T$e downlin reference sym)ols are used )y t$e &! for c$annel estimation and cell measurements 0Le*el' uality1 for mo)ility. T$e eN9 supports relati*e RS 3 PDS7 power control settin%s. - relati*e offset )etween t$e PDS7 and RS can )e confi%ured )y /2, on cell le*el. T$e eN9 ensures t$at total Tx power is not exceed. T$e sum power for any />D, sym)ol must not exceed t$e committed maximum power' ot$erwise all t$e confi%ured )oosts 0P7571 may not )e applied.

.

RA41217EN60GLA0

dlRsBoost Downlin RS transmission power )oost LN!L; "d9 0"1' #.GGd9 0#1' @d9 0?1' E.GGd9 0@1' Fd9 0E1; 0 dB


Module Contents (eriew (,L/)+'eriew (,L/)+'),S+ (,L/)+'),++ ( ,L/)+'+losedLoo (3nterferenc eaware,LowercontrolRL60 (,L/)+')arameters (-L/)+ (D L % P C & P C o n P D C C ++ (Gracef ul+ellS"ut down

6

RA41217EN60GLA0


M!in t!r+et o ?L-PC-CCH

/ -L )ower +ontrol for )-++ is an additional mec"anism interactin! wit" -L A=+ for )-++ in order to make t-e si4nalin4 as rob'st rob'st as !ossible / -L/)+/++ aims at 1W tar!et 8LER $ut cannot modif% AGG assi!nments / =ain actions erformed $% -L/)+/++ • Power red'ction red'ction on ++Es wit" assi!ned AGG leel "i!"er t"an reFuired;or eFual>

• Power boostin4 boostin4 on ++Es wit" assi!ned AGG leel lower t"an reFuired • EB'al !ower relocation relocation amon! all sc"eduled ++Es • ,acro cell case A# • &niform &! distri)ution



er +ood CC=s05 CC=s $i%$ly a)o*e #U 9L!R tar%et1 

B!d CC=s CC=s 0-VV le*el too $i%$ to meet #U 9L!R tar%et1 

3 still so"e &ower !v!il!ble' !v!il!ble relocate eKually amon% all !s -CC= 5-CC=

7

1-CC=

RA41217EN60GLA0

-CC=

en!bleLow#++ !na)le lower a%%re%ation selection for PD7 L- . LN!L; True3>alse; 6!lse


Princi&les o ?L-PC-#MC / )-++ )ower +ontrol can $e enabledAdisabled b" O9 switc/ =a9imum transmit !ower o t-e Power *m!lifer cannot be eceeded eceeded ; pMax V <=> / Reduction and $oostin! ran!e is strictl% dened and is alwa%s considered as t-e limit or !ower level modifcation / -L/)+/++ oerates to!et"er wit" -L/A=+/++ on TT2 basis / -+3 messa!es wit" more t"an one ++E ;AGG/XK1> "ae a Yat )S-# t"us all CCEs belon4in4 to one sc-ed'led $E are transmitted wit- t-e same !ower S'ort 4!"e

?escri&tion

R!n+e/ Ste&

?e!ult !lue

!na)lin%3disa)lin% P for PD7. 5n case t$e parameter is disa)led' a flat downlin PSD is used.

&dcc'PcBoost

,aximumpower)oostper!.

&dcc'PcRed

,aximum power reduction per !.

Fd9

9TS

7ardcoded

&dcc'PcReloc

,aximum limit on t$e eKual power relocation per !.

@d9

9TS

7ardcoded

RA41217EN60GLA0

true

Ed9

ell

Re"!rF

en!blePcPdcc'

C

true' false

P!r!"eter Sco&e

9TS

$an%in%parameter reKuires o)4ect locin%. /perator confi%ura)le. 7ardcoded


Module Contents (eriew (,L/)+'eriew (,L/)+'),S+ (,L/)+'),++ ,L/)+'+losedLoo ( ( 3nterferenceaware,LowercontrolRL60 (-L/)+'RL0 (- L / ) +)' + o n ) - + +  ( r a c e  ' l C e l l --''ttdd oowwnn

D

RA41217EN60GLA0


Nr!ceul Cell S'utdown

Reduced Ser*ice 5mpact • Stepwise downlin power reduction in order to enforce acti*e and idle mode mo)ility to ot$er cells layers en!bleNrlS'dn

• /perator confi%ura)le settin%s

T$e parameter ena)les t$e feature WVraceful ell S$utdownW. LN9TS; Disa)led 0"1' !na)led 0#1; =n!bled ( ()

DL power

time $ando*er or cell reselection

40

RA41217EN60GLA0


Nr!ceul Cell S'utdown

• T$e eNode 9 reduces stepwise t$e DL power to a minimum power le*el • T$e num)er of steps and t$e s$utdown time is operator confi%ura)le • T$e )roadcasted power for t$e reference sym)ols is not c$an%ed' i.e. &! assumes t$at t$e eNode 9 power is unc$an%ed

• - wait timer of #" seconds is applied after t$e last power down step )efore t$e administrati*e state is set to loced and t$e operational state is set to disa)led.

s'utdownSte&#"ount Num)er of Steps for Vraceful ell S$utdown LN9TS; #...#F;#; >

41

RA41217EN60GLA0

s'utdownKindow Time 5nter*al for Stepwise /utput Power Reduction for Vraceful ell S$utdown LN9TS; F...#H";F; >0


LTE Radio Parameters RL60 - Power Control-Nokia

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