OEO106030 LTE ERAN3.0 Power Control Feature ISSUE1.00

8/17/2019 OEO106030 LTE ERAN3.0 Power Control Feature ISSUE1.00

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Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved.

LTE eRAN3.0 Power Control Feature


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Objectives

Upon copletion o! t"is course# $ou will be able to% &escribe t"e object o! power control in LTE &escribe t"e strate'$ an( paraeters o! &L power control &escribe t"e strate'$ an( paraeters o! UL power control

)pleent t"e coan( !or t"e paraeters o(i(icaiton

age3


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Contents

1. Pow r control ov rvi w

2. &ownlin* power control !eature an( paraeters

3. Uplin* power control !eature an( paraeters

age!


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Classi!ication o! Power Control

Accor(in' to t"e (irection# power control is per!ore( bot" on (ownlin* an( uplin*

Downlink powercontrol

Uplink power control

Cell-specifc reerence signalSounding RS

Synchronization signal

PBCPR!C

PC"#C

P$SC P%SC

P$CCP%CCP#C

age#


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Contents

1. Power control overview

2. &ownlin* pow r control ! atur an( para t rs

3. Uplin* power control !eature an( paraeters

age$


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&L Power &istribution

Total DL Power

Fixed setting Dynamic power control or

fixed setting

RSPSS+SSS

PBCH

PCFICH

PDCCH SIBs!Paging!R" response

sc#ed$ling

PDSCH SIBs!Paging!R" rsponse%

PHICH

PDCCH Dedicate &' sc#ed$ling%

PDSCHDedicated &' data%

age%


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Cell ,peci!ic R, Power ,ettin'

EPRE% Ener'$ Per Resource Eleent T"e power settin' is base( on EPRE

Type A Sym(ol) wit#o$t RS R's Type B Sym(ol) RS R's

age&


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Cell ,peci!ic R, Power ,ettin' -Cont .

R, Power / Total power per c"annel-( 1 20l'-total subcarri

er20l'-P 2

Bandwidth

PB PRS ( dBm)

&'( & &).2

&*( & &+.,

2'( & &*.2

3/4

1

1

3/4

1

1

X

1

1

X

3/4

1

1

3/4

1

1

R 1

1

R

3/4

1

1

3/4

1

1

X 1

1

X

3/4

1

1

3/4

1

1

R 1

1

R

PB* , "ntennas

compensate

compensate

PB Power o type B symol Power otype ! Symol

& !/0 port 2 or , !/0 ports

' & *,

& ,* &

2 3* 3,

3 2* &2

antennas, -w per antenna

age10


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,$nc"roni5ation ,i'nal Power ,ettin'

Power,C6 / Re!erence,i'nalPwr ,c"Pwr

age11


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PC67PCF)C6 Power ,ettin'

PowerPC6 /R ! r nc ,i'nalPwr Pbc"Pwr

PowerPCF)C6 / R ! r nc ,i'nalPwr Pc!ic"Pwr

age12


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P&CC67P&,C6 Power ,ettin'

)n t"e !ollowin' two status# t"e power !or P&CC6 an( P&,C6 power is !i8e( settin' +"en P&CC6 carr$ sc"e(ulin' in!oration o! coon contr

ol in!oration -RAC6 response 7pa'in' in(icator +"en P&,C6 carr$ t"e coon in!o -RAC6 response7,)7pa'

in' essa'e

age13


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&$naic Power Control 9 P6)C6

A "i'" probabilit$ o! t"e UE incorrectl$ (eo(ulatin' t"e P6)C6 will severel$ a!!ect user t"rou'"put. Power control ensures t"e per!orance o! t"e P6)C6 !or all UEs w"ile eeti

n' t"e re:uireents !or t"e ER.

'stimate SI.R/RS

Compare it wit# target SI.R/RS

"d0$st PHICH power

C1I Report

age1!


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&$naic Power Control 9 P&CC6PDCCH dynamic power

control switc#

2ff

Set PDCCH wit# fixedpower

e.B meas$re BL'R

Target BL'R +

/

2n

Res$lt3- 4-

Decrease Power Increase Power

age1"


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P&,C6 Power Presentation

Sym(ol

PPDSCH/" power of symbol type A on PDSCH % / 5 " + ReferenceSignalPwr

PPDSCH/B power of symbol type B on PDSCH % / 5B + ReferenceSignalPwr

P " * 5 "

PB * 5B ! 5 "

X X

R R

X X

R R

sym(ol type " on PDSCH S $ ( / c ar r i e

r s

sym(ol type B on PDSCH

Power control for t#e PDSCH is performed

to determine P " for eac# &'6

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P&,C6 Power Control ;ec"anis

Switch Setting Power Control (echanism

$l#cicStaticSwitch1 /1 or$l#cic$ynamicSwitch1/

$ynamic power control is disaled.P$SC power is fed setting respecti4elyor the Center %ser 5CC%6 and Cell 7dge

%ser 5C7%6.

$l#cicSwitch1 "" or$l#cicReuse3Switch1/

andPdschPa!d8Switch1 /

$ynamic Power control is applicale orP$SC

$l#cicSwitch9""97/%( or$l#cicReuse3Switch1/ and

PdschPa!d8Switch1 ""

P$SC power is fed setting

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P&,C6 Power Control 9 &$naic

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Contents

1. Power control overview

2. &ownlin* power control !eature an( paraeters

3.Uplin* pow r control ! atur an( para t rs

age1&


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PRAC6 Open Loop Power Control

ens$re t#e randomaccess s$ccess

rate and latency

7inimi8e t#e

transmit power

Pream(le "

Pream(le B

Pream(le C

e.B Initially sets PR"CH pream(le

expected recei9ed power

&' estimates downlin: pat# loss

&' sets t#e PR"CH transmit

power according e.B parameter

and pat# loss

If t#e random access pream(le

attempt fails ,&' can increase t#e

transmit power for t#e next R"

pream(le attempt

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PRAC6 Power Control

T"e purpose o! power control !or t"e PRAC6 is to ensure t"eran(o access success rate w"ile inii5in' transit power

T"e PRAC6 power is calculate( usin' t"e !ollowin' !orula%

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})1(,min{ _ step pre preamble preoCMAX PRACH N PL P P P ∆⋅−+∆++=


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Relate( Paraeters

;O& RAC6CF<

;O& CELLULPC&E&)C

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PU,C6 Power Control Overview

T"e purposes o! power control !or t"e PU,C6 are as !ollows% Lower inter!erence to nei'"borin' cells an( increasin' cell t"r

ou'"put Ensure services rates !or users on cell e('es

t"e transit power !or t"e PU,C6 is calculate( usin' t"e ! ollowin' !orula%

age23

)}()())(log(10,min{)( _ i f i PL P i M P i P TF PUSCH o PUSCH CMAX PUSCH +∆+⋅++= α


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)nner Loop Power Control9 &$naic ,c"e(ulin' ,ervice

)nner loop A(just TPC accor(in' to t"e transit power (ensit$

age2"


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Close( Loop Power Control 1 ,ei9static

Close( loop A(just TPC accor(in' to t"e )LER

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Relate( Coan(s

Al'orit" ,witc"

)nitial power settin'

age2$


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;s'3 Power Control

+"en t"e PU,C6 carries ;s'3# t"e transit power o! eac"UE=s PU,C6 is calculate( usin' t"e !ollowin' !orula%

age2%

)}()())(log(10,min{)( 3 _ O_pre i f i PL P i M P i P TF Msg PREAMBLE PUSCH CMAX PUSCH +∆++∆++=


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PUCC6 Power Control

T"e PUCC6 carries t"e AC>7NAC> in!oration# C?)s# an( sc"e(ule re:uest -,R in!oration relate( to (ownlin* (ata.+"en t"e probabilit$ o! incorrect (eo(ulation on t"e PUCC6 is "i'"# user t"rou'"put is severel$ a!!ecte(.

T"e purposes o! power control !or t"e PUCC6 are to ensure t"e PUCC6 per!orance an( re(uce t"e inter!erence to nei'"borin' cells.

T"e transit power !or t"e PUCC6 is calculate( usin' t"e ! ollowin' !orula%

age2&

( ) )}()(,nh,min{)( _ CQI _ 0 i g F n PL P P i P PUCCH F HARQ PUCCH CMAX PUCCH +∆+++=


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)nner Loop Power Control

)nner loop A(just TPC accor(in' to t"e ,)NR

age30


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Relate( Coan(s Al'orit" ,witc"

)nitial power settin'

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,oun(in' R, Power Control

T"e ,R, is use( !or uplin* c"annel estiation an( uplin* tiin'. Power control !or t"e ,R, iproves t"e precision inuplin* c"annel estiation an( uplin* tiin'.

T"e ,R, power is calculate( usin' t"e !ollowin' !orula%

T#e same as P&SCH Power Control

age32

)}()log(10,min{)( _ 0 _ CMAX i f PL P P M P i P PUSCH OFFSET SRS SRS SRS +⋅+++= α


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Documents

OEO106030 LTE ERAN3.0 Power Control Feature ISSUE1.00