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 comletin! After comletin! t"is module# t"e articiant articiant s"ould $e a$le a$le to descri$e# desc ri$e# discuss discuss and anal%&e' anal%&e' ()rinc )rincile iles s of L*E L*E )+ (,L o oen en lo loo o )+ a art rt (,L clo closed sed loo loo )+ ar artt (-L owe owerr setti settin!s n!s ()S()+ ima imacts 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/)+'eriew (,L/)+'),S+ (,L/)+'),++ ,L/)+'+losedLoo ( ,L/)+'+losedLoo ( 3nterferenceaware 3nterferenceaware,Lowercontrol ,Lowercontrol 60 RL (-L/)+'RL0 (-L/)+')+on)-++ (Gracefu l+ellS"utdown l+ellS"utdown
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© Nokia Solutions and Networks 2014
Overview Objective 3mroe 3mr oe cell cell ed!e $e"a $e"aiour iour## redu reduce ce inter/cell inter/cell int interfer erference ence and and owe owerr con consum sumtion 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 !ies es f fed ed !o !owe werr de dens nsit it" " !e !err PR PR# # sc" sc"edu eduled led for tra trans nsort5 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 adati tie: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 lee ell ?0 ?055 5551 510@ 0@ d8 at atte tenu nuat atio ion n in 05 051 1 d8 st ste es 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 oe oen 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 $e swi switc tc"e "ed d on an and d oB>
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© Nokia Solutions and Networks 2014
Module Contents (eriew ($L%PC&Over $ L % P C & O v e rview vie w (,L/)+'),S+ (,L/)+'),++ ( ,L/)+'+losedLoo (3nterferenc eaware,LowercontrolRL60 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$an +D,- • &L: dynamic' slow P /pen Loop 0/L1 2 losed Loop 0L1 • need for PL 3 s$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 doesnt 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 maes t$at t$e PSD is constant independently of t$e Tx )andwidt$.
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© Nokia Solutions and Networks 2014
Overview Proced're or low $L Power Control / ,E controls t"e *9 ower to kee t"e transmitted !ower s!ectral densit" (PD) constant indeendent of t"e allocated transmit $andwidt" ;)R8s> / 3f no feed$ack from eNode8 ; in t"e )-++ ,L )+ command> t"e ,E erforms oen loo )+ $ased on at" loss measurements / 3f feed$ack from eNode8 t"e ,E corrects t"e )S- w"en receiin! )+ commands from eNode8 ; in t"e )-++ ,L PC command> command / )+ commands ;u and down> $ased on ,L Fualit% and si!nal leel measurements / *!!lied se!aratel" or P$C+, P$CC+ / Scoe of ,L )+ is ,E leel ; erformed searatel% for eac" ,E in a cell>
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© Nokia Solutions and Networks 2014
Module Contents (eriew (,L/)+'eriew ($L%PC&P$C+ (,L/)+'),++ ,L/)+'+losedLoo ( ( 3nterferenceaware,LowercontrolRL60 (-L/)+'RL0 (-L/)+')+on)-++ (Graceful+ellS"utd own
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O&en Loo& (OL)
UL-PC: PUSCH
Closed Loo& (CL)
PPUSCH (i ) = min { PCMAX ,10 log10 ( M PUSCH (i )) + PO_PUSCH ( j ) + α ( j ) ⋅ PL + ∆ TF (i ) + f (i )} [ dBm ] PH ( i ) = PCMAX + PO_PUSCH ( j ) + α ⋅ PL + ∆ TF (i ) + f (i ) } [ dB ] − { 10 log10 ( M PUSCH (i )) PPUSCH (i) :PUSCH Power in subr!"e i PCM#$: 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&S7041 =
041
P/B&!BP&S7
PL: &!t'loss dB * reerenceS reerenceSi+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 / dn!" dn!"ic ic sc'edulin+: j* P/BN/,5N-LBP&S70"'#1: cell specific 0Sys5nfo1 P/B&!BP&S70"'#1: &! specific 0RR1 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&S70?1: P/BPR! = ∆Pream)leB,s%@ P/B&!BP&S70?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 taes into account effects lie 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$annel conditions 0tae into account e.%. fast fadin%1 •
orrect t$e estimations of power from t$e open loop P PSD: Power Spectral Density
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O&en Loo& PC
PPUSCH (i ) = min { PCMAX ,10 log10 ( M PUSCH (i )) + PO_PUSCH ( j ) + α ( j ) ⋅ PL + ∆ TF (i ) + f (i )} [ dBm ] )0G),S+2;H> I )0GN0=3NALG),S+2;H> J )0G,EG),S+2;H> HI0 /K ),S+ transmission wit" semi/ersistent !rant ;not in RL.0> HI1 /K ),S+ transmission wit" d%namic sc"edulin! HI2 /K ),S+ transmission for random access !rant )0GN0=3NALG),S+2;H> /K cell secic comonent si!naled from s%stem information for HI0# 1 *"is term is a common ower leel for all mo$iles in t"e cell ;used to control S3NR> &04o"Pusc' Nominal Power for &! P&S7 Tx Power alculation LN!L; (#?F..?Ed)m; #; -50 dB"
)0G,EG),S+2;H> /K ,E secic comonent roided $% "i!"er la%ers ;RR+> for HI0#1 *"is term is a ,E secic oBset used to correct t"e errors from t"e estimation of t"e at"loss5 p"NomPusc$ ( T$is parameter defines t$e &!(specific nominal power for t$e P&S7. &sed for P"BP&S7 calculation in &! uplin power control eKuation 0P#1 for controllin% t$e mean recei*ed SNR for user data durin% 0re1transmission correspondin% to a recei*ed PD7 wit$ D5 format " associated wit$ a new pacet transmission. T$is parameter is used to control mean recei*ed SNR for user data .
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PUSCH 6or"ul!
PPUSCH (i ) = min { PCMAX ,10 log10 ( M PUSCH (i )) + PO_PUSCH ( j ) + α ( j ) ⋅ PL + ∆ TF (i ) + f (i )} [ dBm ] PL: &!t'loss dB dB * reerenceS reerenceSi+n!lPower i+n!lPower , 'i+'er l!er iltered RSRP
T$is pat$ loss compensation factor a is ad4usta)le )y /2,. 7 is a cell ( specific parameter 0)roadcasted on 971.
#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
© Nokia Solutions and Networks 2014
Convention!l < 6r!ction!l PC ( Conventional PC sc-emes& sc-emes& • Attemt to maintain a constant S3NR at t"e receier • ,E increases t"e *9 ower to full% comensate for increases in t"e at" loss / .ractional PC sc-emes& • Allow t"e receied 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% comensated5 • /1& /1& 3mroe air interface eMcienc% < increase aera!e cell t"rou!"uts$% reducin! 3nter/cell interference / G)) secies fractional ower control for t"e ),S+ wit" t"e otion to disa$le it < reert to conentional&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
© Nokia Solutions and Networks 2014
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$erwise
1.25 delt!.=n!bled !na)led TB size (MCS) impact to &! P&S7 power calculation LN!L; false "' true #-- !lse
MPR * .BS/4R= wit$ 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 9locs1 it is so selected to increase t$e num)er of )its per Resource !lement
5f t$is parameter is ena)led' P&S7 power calculation in &! uplin power control eKuation taes t$e Transport 9loc si8e in account durin% t$e power calculation
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© Nokia Solutions and Networks 2014
Module Contents (eriew (,L/)+'eriew (,L/)+'),S+ ($L%PC&P$CC+ ,L/)+'+losedLoo ( ( 3nterferenceaware,LowercontrolRL60 (-L/)+'RL0 (-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 subr!"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 0RR1 PL: &!t'loss dB * reerenceSi+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 $0n1 < #"lo%#" 0n53E1 ot$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
© Nokia Solutions and Networks 2014
?e ! !u lt n3a
Module Contents (eriew (,L/)+'eriew (,L/)+'),S+ (,L/)+'),++ $L%PC& ClosedLoo! ( $L%PC& ClosedLoo! ( 3nterferenceaware,Lowercontrol 60 RL (-L/)+'RL0 (-L/)+')+on)-++ (Gracefu l+ellS"utdown
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UL-PC: Closed loo& - PUSCH (e@!"&le)
Closed loo& !djust"ents: (i) * (i-) A
PUSCH
(i - PUSCH)
i.e. recursi*e determination
or
(i) * w$ere
PUSCH PUSCH
(i - PUSCH) i.e. a)solute settin%
is t'e si+n!led .PC in subr!"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&S7 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&S7 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&S7 LN!L; (#?G..."d9m;#d9m ;--0EdB"
ul&cU&levSc' 7i%$ T$res$. >or RSS5 for P&S7 LN!L; (#?G..."d9m;#d9m ;--55dB"
RA41217EN60GLA0
© Nokia Solutions and Networks 2014
Module Contents (eriew (,L/)+'eriew (,L/)+'),S+ (,L/)+'),++ $L%PC& ClosedLoo! ( $L%PC& ClosedLoo! ( 2nter 2nter erenceaware$L!owercontrolRL60 e renceaware$L!owercontrolRL60 (-L/)+'RL0 (-L/)+')+on)-++ (Gracefu l+ellS"utdown
2
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RL>0
2ntererence aware $L !ower control
L*E16 otimi&es tradeoB $etween t"e t"rou!"ut ac"ieed in t"e own cell and t"e ulink interference inHected to nei!"$or cells ,L ower control is trade%o3 $etween inter%cell intererence 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 2ntererence%aware $LPC ;2*wPC 2ntererence%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
2ntererence 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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© Nokia Solutions and Networks 2014
,L 3nterferenc e
RL>0
LTE776& 2ntererence 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"aiour adHustment' /
L5CEL&'l!cRePwr2*w - roides an eFual s"ift of *ar!et S3NR for all ,Es in t"e cell# re!ardless of t"eir at"loss ratios (dea'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 (dea'lt )
/
L5CEL&'l!c9in:'al2*w – denes t"e minimum tar!et S3NR for er% small at"loss ratios5 (dea'lt linear 0d#)
ul&cRePwr3# Ref &L power for 5-&L P
ul&cC=B!l!nce3#w ell(center3ed%e )alancin% for 5- &L
ul&cMinu!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
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RL>0
LTE776& 2ntererence aware $L !ower control
S3NR tar!et is calculated er ,E $asis and it "as redened $oundaries +ell/ed!e ,Es are allowed a minim'm 25R een if t"e% create e9cessie interference ;more t"at would $e allowed $% at"loss ratio> / -ened $% Q min LNCEL:ulpcMinQualIAw# determines t"e lower limit for I LNCEL:ulpcMinQualIAw S3NR*ar!et in linear scale
9aim'm 25R ; sinr > is t"e uer limit for S3NR*ar!et and indicates t"e S3NR reFuired to ac"iee t"e "i!"est allowed =+S in ,L max
/ 3ts alue deends on t"e eN8 con!uration
ul&cMinu!l3#w ,in &L Kual for 5- &LP LN!L; "...' step ".?;
-enest"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
-enes ma9imum S3NR w"ic" is reFuired to ac"iee t"e "i!"est allowed=+S in ,L
S34R%.!r+et
Cell-ed+e
27
,aximum S5NR
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Cell-center
S5NR d9mM
© Nokia Solutions and Networks 2014
LTE776& 2ntererence aware $L !ower control 9aim'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 $e found from t"e arameter 9C0 9C<0# 9C<0 or actModulationSchemeUL # w"ic" restricts it to eit"er 9C0# 9C<= /
it" LTE44 64 QAM in UL# ma9Allowed=cs is 9C<> 9C<> for *--
eN8 kees a static ta$le ;from real c"annel estimates> of =+S s5 reFuired S3NR main!# called Pideal S3NRP# for =+S K . /
S3NR=a9=cs is t"e S3NR t"at corresonds 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 !erormance ;due to e5!5 diBerent con!uration# of antennas or c"annel c"aracteristics> are coered 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
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"!@#llowedMcs
S34RM!@Mcs
LTE776& 2ntererence 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 udated 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 comared to t"e decision arra%'
Power co""!nd
-dB
?ierence
0dB -02J
"
AdB 02J
#
AE dB
RSSIAvg + !B ≦ ulpcRssiMaxIAw
- dB
RSSIAvg > ulpcRssiMaxIAw
1
UL S34R *s S34R%.!r+et difference
2D
RA41217EN60GLA0
© Nokia Solutions and Networks 2014
RL>0
LTE776& 2ntererence 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 ater t-e last command •
ardcoded to recetions and
/ t"e time di3erence rom t-at last ),S+ ower command transmission •
Secied $% t"e arameter ulpcMinWaitForPc ulpcMinWaitForPc ;default .0 ms>
ulpcMinWaitForPc **3s "ae elased since t"e last suc" decision
ulpcMi"#ait$%&'c
>ull 9uffer &! @ TT5s
0
RA41217EN60GLA0
-ND
*"e num$er of ),S+ recetions ;,L S3NR samles> since t"e last decision is "i!"er or eFual to
"TT5s
Tri44e r .i"e (..3s)
ul&cMinK!it6orPc ,inimum waitin% time for next &L(P decision LN!L; F...H" TT5; #; 1J ..3
© Nokia Solutions and Networks 2014
Module Contents (eriew (,L/)+'eriew (,L/)+'),S+ (,L/)+'),++ ,L/)+'+losedLoo ( ( 3nterferenceaware,LowercontrolRL60 (DL%PC&RL70 DL%PC&RL70 (-L/)+')+on)-++ (Graceful+ellS"utd own
1
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© Nokia Solutions and Networks 2014
?L-PC RL10: (st!tic) cell &ower reduction • )ased on sin%le parameter !LLBP+RBR!D < "."' ".# ?"." d9 •
cell si8e ad4ustment and co*era%e control
&M!@ ,aximum output power LN!L; @G." 0"1' @I." 0#1' E"." 0?1' E#.H 0@1' E@." 0E1' EE.H 01' EF." 0F1' EG.H 0G1;-#"."d9m < #" m+ @G."d9m < + @I."d9m < H + E"." d9m < #" + E#.H d9m < # + E@." d9m < ?" + EE.H d9m < @" +
• flat Power Spectral Density 0PSD1 • semi(static ,5,/B/,P 0if ena)led1 RLE0: o&tion!l &ower boost: PC63CH8 PH3CH8 ?L ?L RS RS
PSD
dlCellPwrRed Reduction of DL Tx power; deducted from max. antenna TX power. LN!L; "..?"; ".#; 0 dB
PSD
EF." EG.H d9m d9m < < E" F" + + EI." d9m < H" + PSD < 0,axBTXBPwr . !LLBP+RBR!D1 . #"Jlo%#"0 #?JA PR9s1
#lloc! #lloc!ted ted ?L PR PRBs Bs
>reKuency
?L Pilots 2
RA41217EN60GLA0
PSD < 0,axBTXBPwr . !LLBP+RBR!D1 . #"Jlo%#"0 #?JA PR9s1
P?CCH
Time
P?SCH8 PCH BCH8 SCH © Nokia Solutions and Networks 2014
?L-PC: Power Reduction Cell Power Reduction PSD < 0p,ax ( !LLBP+RBR!D1 ( #"Jlo%#"0 A PR9sBDL J#?1 ( ,5,/B/,P d9mM
PSD: Power Spectral Density' w$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$e power factor for • MIMCM' = *1 !B %& MIM .ive&sit/ a"! %& MIM Spatial Multiplexi"g compensation antenna(specific maximum power in case of a downlin - PSD given per antenna (RF amplifier output transmission usin% at least two - PR!s not sc"eduled are blan#ed TX antennas LN!L; "..#"; "."#; 0 dB
• MIMCM' = * !B %& SIS,SIM
#&&lied to U= / cell s&eciic c'!nnels !nd si+n!ls:
• PS?%C=LL%C.RL or BCCH i2e2 PBCHAP?SCH8 PBCHAP?SCH8 PC63CH !nd PCH • PS?%C=LL%RS or reerence si+n!ls (RS) / &ilots • PS?%C=LL%S4C or or snc'roniG!tion snc'roniG!tion c'!nnel • PS?%U=%P?SCH or U= s&eciic &!rt o o P?SCH
dlCellPwrRed Reduction of DL Tx power; deducted from max. antenna TX power. LN!L; "..?"; ".#; 0 dB
• PS?%U=%C.RL or P?CCH !nd PH3CH
RA41217EN60GLA0
© Nokia Solutions and Networks 2014
?L-PC: ?L &ower boostin+ boostin+ or or control control c'!nnels • Power osets to t'e PC63CH8 PH3CH8 ?L RS2 • 3ntroduced wit' RLE0 ($%E&') • 9etter detection of P>57 indicatin% t$e num)er of />D, sym)ols for t$e PD7. • 9etter c$annel estimation in case of RS )oostin% may impro*e 7/ performance. • 7i%$er relia)ility of -C3N-C transmission *ia P757.
P>57 />D, sym)ols
T0e eB e"su&es t0at t%tal Tx p%we& is "%t excee!2 ie t0e sum p%we& %& a"/ $.M s/m3%l must "%t excee! t0e c%mmitte! maximum p%we&2 %t0e&wise all t0e c%"igu&e! 3%%sts ('4IC4) ma/ "%t 3e applie! Su3ca&&ie& p%we& 3%%sti"g is %"l/ all%we! i t0e excess p%we& is wit0!&aw" &%m t0e &emai"i"g su3ca&&ie&s C%ve&age i" 5T6 is ve&/ %te" limite! 3/ 752 a"! i" suc0 cases it !%es "%t ma8e muc0 se"se t% imp&%ve t0e c%ve&age i" .5 75 c%ve&age s0%ul! 3e c0ec8e! 3e%&e appl/i"g .5 c%"t&%l c0a""els p%we& 3%%st RS />D, sym)ols 4
RA41217EN60GLA0
© Nokia Solutions and Networks 2014
?L-PC: ?L &ower boostin+ boostin+ or or control control c'!nnels dlPcic'Boost
PC63CH &ower boostin+ P>57 pro*ides information a)out t$e num)er of />D, sym)ols for t$e PD7. T$e eN9 supports dedicated power control settin%s for t$e P>57 in order to ensure t$at especially cell ed%e &!s can properly recei*e t$e P>57. - relati*e offset )etween t$e flat PSD 0Power Spectral Density1 on PDS7 and P>57 can )e confi%ured )y /2, on cell le*el.
PH3CH &ower boostin+ T$e P757 pro*ides -C3N-C information for t$e uplin transmission. T$e eN9 supports dedicated power control settin%s for t$e P757 in order to ensure t$at t$e &! can properly recei*e t$e P757. P757 power )oost may not )e 0fully1 applied if PD7 PSD %oes too low in t$e first />D, sym)ol. 5n t$at case' t$e eN9 rises t$e P757 Power 9oost not applied warnin%. - maximum relati*e offset )etween t$e flat PSD on PDS7 and P757 can )e confi%ured )y /2, on cell le*el.
Downlin P>57 transmission power )oost LN!L; "..F; ".#; 0 dB
dlP'ic'Boost Downlin P757 transmission power )oost LN!L; "..F; ".#; 0 dB
?ownlinF reerence 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 PDS7 power control settin%s. - relati*e offset )etween t$e PDS7 and RS can )e confi%ured )y /2, on cell le*el. T$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 0P7571 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
© Nokia Solutions and Networks 2014
Module Contents (eriew (,L/)+'eriew (,L/)+'),S+ (,L/)+'),++ ( ,L/)+'+losedLoo (3nterferenc eaware,LowercontrolRL60 (,L/)+')arameters (-L/)+ (D L % P C & P C o n P D C C ++ (Gracef ul+ellS"ut down
6
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© Nokia Solutions and Networks 2014
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 leel "i!"er t"an reFuired;or eFual>
• Power boostin4 boostin4 on ++Es wit" assi!ned AGG leel lower t"an reFuired • EB'al !ower relocation relocation amon! all sc"eduled ++Es • ,acro cell case A# • &niform &! distri)ution
er +ood CC=s05 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 PD7 L- . LN!L; True3>alse; 6!lse
© Nokia Solutions and Networks 2014
Princi&les o ?L-PC-#MC / )-++ )ower +ontrol can $e enabledAdisabled b" O9 switc/ =a9imum transmit !ower o t-e Power *m!lifer cannot be eceeded eceeded ; pMax V <=> / Reduction and $oostin! ran!e is strictl% dened and is alwa%s considered as t-e limit or !ower level modifcation / -L/)+/++ oerates to!et"er wit" -L/A=+/++ on TT2 basis / -+3 messa!es wit" more t"an one ++E ;AGG/XK1> "ae a Yat )S-# t"us all CCEs belon4in4 to one sc-ed'led $E are transmitted wit- t-e same !ower S'ort 4!"e
?escri&tion
R!n+e/ Ste&
?e!ult !lue
!na)lin%3disa)lin% P for PD7. 5n case t$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
$an%in%parameter reKuires o)4ect locin%. /perator confi%ura)le. 7ardcoded
© Nokia Solutions and Networks 2014
Module Contents (eriew (,L/)+'eriew (,L/)+'),S+ (,L/)+'),++ ,L/)+'+losedLoo ( ( 3nterferenceaware,LowercontrolRL60 (-L/)+'RL0 (- L / ) +)' + o n ) - + + ( r a c e ' l C e l l --''ttdd oowwnn
D
RA41217EN60GLA0
© Nokia Solutions and Networks 2014
Nr!ceul Cell S'utdown
Reduced Ser*ice 5mpact • Stepwise downlin power reduction in order to enforce acti*e and idle mode mo)ility to ot$er cells layers en!bleNrlS'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 $ando*er or cell reselection
40
RA41217EN60GLA0
© Nokia Solutions and Networks 2014
Nr!ceul Cell S'utdown
• T$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 loced 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
© Nokia Solutions and Networks 2014