Huawei Troubleshooting.pdf

LTE Troubleshooting / Optimization Guidelines

Sprint 4G LTE Troubleshooting and Optimization Guidelines Document Version 2.

4G National RF Engineering

The information contained in this document is proprietary and confidential to Sprint and is intended solely for internal use by Sprint employees. Any unauthorized distribution of this information without the written consent of Sprint is strictly prohibited.

Privileged & Confidential Information This information is subject to Sprint policies regarding use and is the property of Sprint and/or its relevant affiliates and may contain restricted, confidential or privileged materials intended for the sole use of the intended recipient. Any review, use, distribution or disclosure is prohibited without authorization


!e"isions and #ontributions

Organization $et%or& Engineering $et%or& Engineering (Dir) $et%or& Engineering (,gr)

uthor Geo Lubes&ie Geo Lubes&ie

Version 0.

2.

$ame Greg O'#onnor *ui+Lin #hang !ashmi -umar

Date $o"ember 201

E+mail ddress Geo.Lubes&iesprint.c om

3anuar 201

Geo.Lubes&iesprint.c om



Table o5 #ontents 1

General......................................................................................................................... 1.1 1.2 1.3

2

LTE Optii!ation Pro"ess Flo#s........................................................................... 2.1 2.2 2.3

%

+ell Selection 'rocess................................................................................................................... +ell Selection +riteria................................................................................................................... +ell &eselection..........................................................................................................................1-

*nter+eren"e %ontrol...............................................................................................1  LTE Han(o- Optii!ation....................................................................................1 % #.1 #.

 

&S&'.............................................................................................................................................( S)*&..............................................................................................................................................(

%ell $ele"tion .............................................................................................................. !.1 !. !.%

) ,

$ite Level Optii!ation........................................................................................................" %luster Level Optii!ation..................................................................................................# &ar'et level Optii!ation...................................................................................................$

RF %on(itions............................................................................................................. %.1 %.

4

Purpose.......................................................................................................................................! Responsibility...........................................................................................................................! Revision History......................................................................................................................!

Active mode handover................................................................................................................1% )dle mode handover.....................................................................................................................1#

E/TR0N an( %&02 Han(over..................................................................1# R0N Paraeters...................................................................................................... (.1 (.

'hysical +ell )dentity..................................................................................................................&oot Seuence )nde 0&S).........................................................................................................-



0 General 0.0

6urpose Te purpose o+ tis (o"uent is to provi(e national an( lo"al RF gui(elines to troublesoot an( optii!e $print5s 4G Net#or'. Tis (o"uent #ill be use( by $print RF Engineering to un(erstan( ig level net#or' per+oran"e etri"s.

0.2

!esponsibilit Te 4G National RF Per+oran"e Engineering tea is responsible +or up(ating6 an( onitoring te appli"ation o+ te gui(elines (es"ribe( in tis (o"uent. Please "onta"t te +ollo#ing6 i+ tere are 7uestions regar(ing tese planning gui(elines. Geo- Lubes'ie6 National RF Planning an( Engineering 81934491,:; 2eoff.lubes3ie4sprint.com

usty uar 839433943); &anager RF Planning an( Engineering Rasii.>uar=sprint."o

0.1

!e"ision *istor

ate

?ersion

11@1)@21 3

1.

o"uent O#ner Geo- Lubes'ie

%oents Original (o"uent 81 st ra+t;


!



"


2

LTE Optimization 6rocess 7lo%s LTE troublesooting @ optii!ation a"tivities "an be separate( into 3 (istin"t levelsA   

$ite Level %luster Level &ar'et Level

0t te very start6 eNBs are te +oun(ation o+ all LTE Net#or's. %ontiguous groups o+ eNBs +or "lusters an( groups o+ "lusters a'e up te ar'ets.

Figure 1: Network Optimization Flowchart

2.0 Site Le"el Optimization $ingle site veriC"ation6 te Crst pase o+ net#or' optii!ation6 involves +un"tion veriC"ation at ea" ne# site. $ingle site veriC"ation ais to ensure tat ea" site is properly installe( an( tat paraeters are "orre"tly


#


"onCgure( a""or(ing to te Gol(en *age 8G*;. 0 lin' to te latest G* +or all OE&$ "an be +oun( at te lin' belo#. http5//sprintcommunities.corp.sprint.com/sites/cops/!2&6'erformance/'arameter 7-8anagement/6orms/All)tems.asp9&oot6older:76sites76cops76!2&6'erformance 76'arameter7-8anagement762olden7-'arameters762olden7-'arams

>ey Per+oran"e *n(i"ators 8>P*s; ensure ea" site is per+oring as it soul( be. 0t te very iniu te engineer soul( vali(ate an( analy!e te +ollo#ing etri"s to ensure tat te eNB is per+oring as it soul( be. *t soul( be entione( tat ea" OE& as teir o#n spe"iC" targets +or ea" >P* an( soul( be re+eren"e( #en analy!ing te (ata.       

0verage D Pea' (o#nloa( Trougput 0verage D Pea' uploa( Trougput *ntra eNB an(overs 8bet#een se"tors; *nter eNB an(overs to Crst tier neigbors %onne"tion setup tie D %onne"tion su""ess rate Laten"y ?ali(ate R$RP6 %*NR6 R Po#er6 an( T Po#er are as epe"te( +or te test lo"ation

2.2 #luster Le"el Optimization %ontiguous "overage bet#een eNBs #itin a "luster ensures sealess obility tere+ore6 tis optii!ation a"tivity is a aor +a"tor in overall net#or' a""essibility an( retainability. 0s o+ te #riting o+ tis (o"uentation tere is no baseline o+ te $print LTE net#or'. *t is iperative tat #en te OE&s subit "lusters +or a""eptan"e tat te lo"al RF teas are involve(. Lo"al RF teas soul( "reate &ap*n+o Cles +or ea" "luster6 #i" so# areas +or +uture optii!ation.


$


Figure 2: Mapinfo file created by local RF showing areas for future optimization

0 "luster (rive route ust be "are+ully (esigne( to "over ea" se"tor o+ all sites so tat all aor ig#ays6 roa(s6 $print stores an( aor "ustoer lo"ations are "overe(. 0nalysis o+ te (rive (ata #ill so# areas +or potential optii!ation "anges to iprove te overall user eperien"e. 0ll "anges a(e (uring te optii!ation pase soul( be (o"uente( +or +uture re+eren"e an( possibly sare( #it oter ar'ets as a eans o+ best pra"ti"e. 0 aor "allenge tat te engineer #ill +a"e is te +a"t tat te 4G an( 3G net#or's are using te sae antenna. 0t tis tie6 voi"e is still te nuber one revenue sour"e +or $print tere+ore6 optii!ation e-orts on te 4G sites should not negatively impact te un(erlying 3G net#or'. 0s in $ite level optii!ation at te very iniu te engineer soul( veri+y te +ollo#ing >P*s (uring %luster Optii!ation       

0verage D Pea' (o#nloa( Trougput 0verage D Pea' uploa( Trougput *ntra eNB an(overs 8bet#een se"tors; *nter eNB an(overs to Crst tier neigbors %onne"tion setup tie D %onne"tion su""ess rate Laten"y ?ali(ate R$RP6 %*NR6 R Po#er6 an( T Po#er are as epe"te( +or te test lo"ation


(


2.1 ,ar&et le"el Optimization $iilar to "luster level optii!ation6 ultiple subsets are loo'e( at as a #ole. Here6 several "lusters soul( be evaluate( an( analy!e( as a #ole to veri+y tat obility an( proper net#or'ing eists. Te on9going evolution o+ te net#or' (ue to te a((ition o+ ne# a"ro6 i"ro6 Pi"o an( in9buil(ing sites re7uires tat te engineer "ontinuously loo' at optii!ing te net#or' to eet te (ean(s o+ "apa"ity6 an( "ustoer epe"tations. 3

!7 #onditions

3.1

RSRP

Re+eren"e signal re"eive( po#er 8R$RP;6 is (eterine( +or a "onsi(ere( "ell as te linear average over te po#er "ontributions 8in 
3.2

SINR

Te $*NR is not spe"iC"ally (eCne( in 3GPP spe"iC"ations. 0 "oon +orula is as +ollo#sA S8$! 9 S/(8 : $) SA in(i"ates te po#er o+ easure( usable signals. Re+eren"e signals 8R$; an( pysi"al (o#nlin' sare( "annels 8P$%Hs; are ainly involve(.





8A in(i"ates te po#er o+ easure( signals or "annel inter+eren"e signals +ro oter "ells in te "urrent syste an( +ro inter9R0T "ells. $A in(i"ates ba"'groun( noise6 #i" is relate( to easureent ban(#i(ts an( re"eiver noise "oeJ"ients.

4

#ell Selection

Te "ell sele"tion pro"ess an( "ell sele"tion "riteria as per 3GPP stan(ar( 3,.34 areA 4.1

Cell Selection Process

Te /E sall use one o+ te +ollo#ing t#o "ell sele"tion pro"e(uresA 1. *nitial %ell $ele"tion Tis pro"e(ure re7uires no prior 'no#le(ge o+ #i" RF "annels are E9/TR0 "arriers. Te /E sall s"an all RF "annels in te E9/TR0 ban(s a""or(ing to its "apabilities to Cn( a suitable "ell. On ea" "arrier +re7uen"y6 te /E nee( only sear" +or te strongest "ell. On"e a suitable "ell is +oun( tis "ell sall be sele"te(. 2. $tore( *n+oration %ell $ele"tion Tis pro"e(ure re7uires store( in+oration o+ "arrier +re7uen"ies an( optionally also in+oration on "ell paraeters6 +ro previously re"eive( easureent "ontrol in+oration eleents or +ro previously (ete"te( "ells. On"e te /E as +oun( a suitable "ell te /E sall sele"t it. *+ no suitable "ell is +oun( te *nitial %ell $ele"tion pro"e(ure sall be starte(. NOTEA Priorities bet#een (i-erent R0T or +re7uen"ies provi(e( to te /E by syste in+oration or (e(i"ate( signaling are not use( in te "ell sele"tion pro"ess.

4.2

Cell Selection Criteria

Te "ell sele"tion "riterion $ is +ulClle( #enA $rlev K  <ereA $rlev  Mrleveas 8Mrlevin Mrlevino-set; 9P"opensation <ereA Te signale( value MrlevinO-set is only applie( #en a "ell is evaluate( +or "ell sele"tion as a result o+ a perio(i" sear" +or a iger priority PL&N #ile "ape( Privileged & Confidential Information This information is subject to Sprint policies regarding use and is the property of Sprint and/or its relevant affiliates and may contain restricted, confidential or privileged materials intended for the sole use of the intended recipient. Any review, use, distribution or disclosure is prohibited without authorization

1-


norally in a ?PL&N )I. uring tis perio(i" sear" +or iger priority PL&N te /E ay "e"' te $ "riteria o+ a "ell using paraeter values store( +ro a (i-erent "ell o+ tis iger priority PL&N. Srxlev Cell Selection RX level value (dB) Qrxlevmeas Measured cell RX level value (RSRP). Qrxlevmin Minimum required RX level in thecell (dBm) Qrxlevminofset Ofset to the sinalled Qrxlevmin ta!en into account in the Srxlev evaluation as a result o" a #eriodic search "or a hiher #riorit$ P%M& 'hile cam#ed normall$ in a P%M& *+ Pcom#ensation ,,S+

4.3

Cell Reselection

%ell resele"tion paraeters are broa("ast in syste in+oration an( are rea( +ro te serving "ell as +ollo#sA Mo-sets6n Mo-set+re7uen"y Myst Mrlevin Tresele"tionR0T

Tis spe"iCes te o-set bet#een te t#o "ells. Fre7uen"y spe"iC" o-set +or e7ual priority E9/TR0N +re7uen"ies. Tis spe"iCes te ysteresis value +or ran'ing "riteria. Tis spe"iCes te iniu re7uire( R level in te "ell in (B. Tis spe"iCes te "ell resele"tion tier value. For ea" target R0T a spe"iC" value +or te "ell resele"tion tier is(eCne(6 #i" is appli"able #en evaluating resele"tion #itin E9/TR0N or to#ar(s oter R0T 8i.e. Tresele"tionR0T+or E9/TR0N is Tresele"tionE/TR0N6 +or /TR0N Tresele"tion/TR0N +or GER0N Tresele"tionGER0N6 +orTresele"tion%&0HRP6 an( +or Tresele"tion%&01RTT;.NoteA Tresele"tionR0T is not sent on syste in+oration6 but use( in


11


resele"tion rules by te /E +or ea" R0T. Tresele"tionE/TR0N Tresele"tion/TR0N Tresele"tionGER0N

Tresele"tion%&0HRP Tresele"tion%&01RTT Tres6 ig

Tres6 lo#

Tresserving6 lo#

Tis spe"iCes te "ell resele"tion tier value Tresele"tionR0T +orE9 /TR0N Tis spe"iCes te "ell resele"tion tier value Tresele"tionR0T +or /TR0N Tis spe"iCes te "ell resele"tion tier value Tresele"tionR0T +or GER0N Tis spe"iCes te "ell resele"tion tier value Tresele"tionR0T +or %&0 HRP Tis spe"iCes te "ell resele"tion tier value Tresele"tionR0T +or %&0 1RTT Tis spe"iCes te tresol( use( by te /E #en resele"ting to#ar(s te iger priority +re7uen"y tan "urrentlyserving +re7uen"y. Ea" +re7uen"y o+ E9 /TR0N an( /TR0N6 ea" ban( o+ GER0N6 ea" ban( "lass o+ %&02HRP an( %&02 1RTT #ill ave a spe"iC" tresol(. Tis spe"iCes te tresol( use( in resele"tion to#ar(s +re7uen"y priority +ro a iger priority +re7uen"y. Ea"+re7uen"y o+ E9 /TR0N an( /TR0N6 ea" ban( o+ GER0N6 ea" ban( "lass o+ %&02 HRP an( %&021RTT #ill ave a spe"iC" tresol(. Tis spe"iCes te tresol( +or serving +re7uen"y use( in resele"tion evaluation to#ar(s lo#er priority E9/TR0N+re7uen"y or


1


R0T. $intrasear" $nonintrasear" T%Ra

N%R& N%RH T%RaHyst

Tis spe"iCes te tresol( 8in (B; +or intra +re7uen"y easureents. Tis spe"iCes te tresol( 8in (B; +or E/TR0N inter9+re7uen"y an( inter9R0T easureents. Tis spe"iCes te (uration +or evaluating allo#e( aount o+ "ell resele"tion8s;. Tis spe"iCes te aiu nuber o+ "ell resele"tions to enter e(iu obility state. Tis spe"iCes te aiu nuber o+ "ell resele"tions to enter ig obility state. Tis spe"iCes te a((itional tie perio( be+ore te /E "an enter noral9obility.


1%


;

8nter5erence #ontrol

o#nlin' 8L; inter "ell inter+eren"e #i" re(u"es te signal 7uality is a aor +a"tor "ontributing to (egra(e( servi"e. *t usually ipa"ts "ell9e(ge users #i" la"' goo( 7uality RF signal (ue to te presen"e o+ ultiple serving se"tors o+ siilar signal strengt. L inter9"ell inter+eren"e s"enario "an also be observe( in (ense urban areas #ere ultipat +a"tor "an results in strong signals +ro various se"tors in one geograpi" region. L inter+eren"e i+ not "orre"te( "an lea( to poor trougput per+oran"e on bot (o#nlin' an( uplin'. Tere+ore an iprove( L "overage in ters o+ bot signal strengt an( 7uality provi(es better user eperien"e. *n(i"ators su" as lo# $ignal to noise ratio 8$*NR;6 lo# s"ale %annel 7uality in(i"ator 8%M*;6 Transission o(e 8transit (iversity;6 lo# Re+eren"e $ignal Re"eive( Muality 8R$RM; an( ig Blo"' error rate 8BLER; are "oon in(i"ators o+ L inter+eren"e. Lo# $*NR an( lo# %M* reports result in lo#er an( ore robust o(ulation s"ee +or (ata transission. Te Crst step in optii!ation e-orts is to iprove te "overage an( 7uality o+ eisting serving "ells resulting in goo( 7uality o+ servi"e 8Mo$;. R$RM is (eCne( in T$ 3,.214 asA Re"erence Sinal Received Qualit$ (RSRQ) is de-ned as the ratio &RSRP/(0123R4 carrier RSS5)6 'here & is the num7er o" RB8s o" the 0123R4 carrier RSS5 measurement 7and'idth. 3he measurements in the numerator and denominator shall 7e made over the same set o" resource 7loc!s. 0123R4 Carrier Received Sinal Strenth 5ndicator (RSS5)6 com#rises the linear averae o" the total received #o'er (in 9+) o7served onl$ in O,:M s$m7ols containin re"erence s$m7ols "or antenna #ort ;6 in the measurement 7and'idth6 over & num7er o" resource 7loc!s 7$ the 20 "rom all sources6 includin co1channel servin and non1servin cells6 ad
1!


o#nlin' *%*% 8L9*%*%; enan"es "ell9e(ge /E per+oran"e by a(usting te po#er +or /E base( on reporte( "annel "on(ition. %ell "enter users get (i-erent po#er allo"ation base( on /E5s +ee(ba"'. 0verage %M* Tresol( etri" is use( to (i-erentiate "ell e(ge an( "ell "enter users. L po#er "ontrol e"anis uses te "annel estiation to a(ust te Pa paraeter #i" lea(s toA  *+ te user is estiate( to be in "ell "enter "on(ition6 /E spe"iC" L po#er relate( paraeter Pa is lo#ere(6 #i" results in po#er re(u"tion o+ (ata sub"arriers +or tat /E an( +urter (e"reases inter+eren"e to neigboring "ells  *+ /E is estiate( to be in "ell "enter "on(ition6 Pa is in"rease( an( en"e

(ata sub"arriers po#er is in"rease( to aintain e(ge /Es 7uality

<

LTE *ando Optimization

Han(over su""ess rate is anoter iportant >P* +o"use( on in optii!ation pro"ess. Having a goo( su""ess rate in(i"ates tat sites in net#or' "onne"t to ea" an( user "an enoy uninterrupte( a""ess to net#or' in obility s"enarios. Te ipa"t o+ LTE an(over per+oran"e (epen(s on #at type o+ appli"ations users are running at teir en(. For eaple6 poor an(over per+oran"e or ig an(over laten"y ave lo# ipa"t on appli"ations su" as Cle trans+er #ere a sall interruption "an be tolerable #ereas ba( an(over per+oran"e ay ave severe ipa"t on ?O*P appli"ations #ere a an(over (rop results in voi"e "all (rop.

6.1

Active mode handover

0"tive o(e an(over "an be o+ tree (i-erent typesA

1. *ntra@*nter Fre7uen"y  Han(over bet#een "ells using sane or (i-erent "enter +re7uen"ies 2. *ntra@*nter eNB  Han(over bet#een "ells o+ te sae or (i-erent site 3. $1@2 base(  Han(over involving &&E intera"tion or (ire"tly bet#een t#o eNBs using 2 lin's Privileged & Confidential Information This information is subject to Sprint policies regarding use and is the property of Sprint and/or its relevant affiliates and may contain restricted, confidential or privileged materials intended for the sole use of the intended recipient. Any review, use, distribution or disclosure is prohibited without authorization

1"


/E "an be "onCgure( in "onne"te( state to report several (i-erent types o+ easureents base( on event types as eplaine( belo#.

Event 01 •

$erving be"oes better tan a tresol(

•

/se( to (ea"tivate Gap &easureents

Event 02 •

$erving be"oes #orse tan a tresol(

•

/se( to a"tivate Gap &easureents

Event 03 •

Neigbor be"oes o-set better tan te $erving

•

/se( to trigger *ntra9F0 Han(o-

Event 04 •

Neigbor be"oes better tan a tresol(

•

/se( +or 0NR


1#



1$


Net se"tion (is"usses te "onCguration relate( to Event 03 #i" is use( to +a"ilitate *ntra9F0 LTE an(over.

*n a"tive o(e easureents are per+ore( only #en $erving %ell R$RP +alls belo# a "onCgurable tresol( 8Smeasure; S Te 03 event paraeters +or 0"tive o(e easureent are transitte( via RR% %onne"tion Re"onCguration &essage S Te paraeter a=ofset (eCnes te 8neigbor  o-set K serving; "riteria. S 0((itionally6 tere is a "ell in(ivi(ual o-set tat "an be "onCgure( per neigbor 85nd>ofset ;. S Tis "riterion ust be satisCe( over a "onCgurable perio( o+ tie +or te easureent report to be (one 83ime3o3rier ;. S Te easureent "riteria "an be base( on R$RP or R$RM an( is "onCgurable 83rierQuantit$ ;. S Te easureent report "an be "onCgure( to report R$RP@R$RM or bot 8Re#ortQuantit$ ;.


1(


S Perio(i" reports "an be generate( a+ter te Event "riteria are et base( on a "onCgurable paraeter 8re#ort5nterval;. S Nuber o+ reports generate( base( on te event is "ontrolle( using a "onCgurable paraeter 8re#ort4mount ;


1


6.2

Idle mode handover

*(le o(e an(over or "ell resele"tion is te pro"ess use( by /E an( net#or' to onitor /E5s lo"ation #itout it re7uiring ra(io resour"es. *n *(le o(e6 /E reains atta"e( at &&E level but reains RR% i(le unless it re7uires RR% resour"es 8+or e.g. To per+or T0/ or Paging pro"e(ures; &aintaining ost "urrent an( up(ate( neigbor list on te eNBs is "riti"al to +a"ilitate su""ess+ul an(over. Neigbor list ust be up(ate( +re7uently to a""oo(ate a((ition o+ ne# sites an( se"tors in te net#or'. %on(ition #ere ultiple an(overs are re"or(e( #itin a very sort perio( bet#een sae t#o "ells in stationary or obile s"enario is 'no#n as Ping9Pong. Ping9Pong "on(ition a-e"ts te en( user as ore pro"essing tie results in poor user eperien"e. Tis situation arises #en bot sour"e an( target se"tors eet te an(over tresol(s an( are e7uivalent in signal strengt. Ping9Pong "an o""ur in bot strong an( #ea' "on(itions. 03 o-set6 $9easure6 Hysteresis an( %ell in(ivi(ual o-set are soe paraeters #i" "an be t#ea'e( to re(u"e Ping9Pong rate.

=

E/TR0N an( %&02 Han(over

E/TR0N an( %&02 an(over "an be use+ul #en bot net#or's are overlai( on sae geograpi"al region. 0 user traveling out o+ LTE "overage area "an an( (o#n to HRP #ile aintaining te sae (ata session an( uninterrupte( (ata trans+er. Tis +eature is elp+ul in "ases #ere a ne# LTE net#or' is (eploye( on a ature( %&02 net#or' an( /E "an rely on un(erlying net#or' #enever it goes out o+ "overage on LTE *pleentation o+ Neigbor list +or un(erlying %&0 net#or' is nee(e( to +a"ilitate E/TR0N to %&02 an(over. On LTE si(e6 appropriate neigboring se"tors #it PN an( "annel in+oration are populate(. Rigt HRP neigbors "an be sele"te( base( statisti"s su" as Han(over atri 8HO&; (ata o+ %&0 net#or'. Optii!ation (rive test "an also give use+ul in+oration in (eCning issing or appropriate neigbors +or E/TR0N to %&02 inter#or'ing. Belo# table eplains Paraeters an( Events use( on E/TR0N to %&02 inter#or'ingA &essage RR% %onne"tion Re"onCguration

*E B2 Event

Paraeter b2Tresol(1Rsrp

es"ription R$RP tresol(1 use( +or triggering te E/TR0 easureent report +or %&02 HRP Event B2.


-


b2Tresol(1Rsr7

RR% %onne"tion Re"onCguration

b2Tresol(2%(a2 

R$RM tresol(1 use( +or triggering te E/TR0 easureent report +or %&02 HRP Event B2. %&02 tresol( 2 use( +or triggering te inter9R0T %&02 easureent report +or %&02 HRP Event B2.

7O-setFre7 ysteresisB2

tieToTriggerB2

report*ntervalB2

report0ountB2

aReport%ellsB2

triggerMuantityB2


02 Event

a2Tresol(Rsrp

a2Tresol(Rsr7

report*nterval02

Hysteresis applie( to entry an( leave "on(ition o+ %&02 HRP Event B2. tieToTrigger value +or %&02 HRP Event B2. Te tieToTrigger value is te perio( o+ tie tat ust be et +or te /E to trigger a easureent report. Te reporting interval o+ a easureent report +or %&02 HRP Event B2. Te nuber o+ easureent reports +or %&02 HRP Event B2. Te aiu nuber o+ "ells in"lu(e( in a easureent report +or %&02 HRP Event B2. Muantity tat triggers te Event B2 easureent Te trigger "an be set +or eiter R$RP or R$RM an( is only appli"able on tresol( 1. 02 event is triggere( #en sour"e be"oes #orse tan te "onCgure( R$RP tresol( 8Re+er to stan(ar( 3,.133 +or R$RP Report apping; Priary R$RM tresol( value +or event02. /se( only #en triggerMuantity02Pri is set to R$RM. eterines te reporting interval o+ a easureent


1


report +or Event triggerMuantity02

01 event is triggere( #en sour"e be"oes #orse tan te "onCgure( R$RM tresol( 8Re+er to stan(ar( 3,.133 +or R$RM Report &apping.

ysteresis02

Hysteresis applie( to entry an( leave "on(itions o+ Event 02 Te tieToTrigger value is te perio( o+ tie tat ust be et +or te /E to trigger a easureent report +or Event 02 Te nuber o+ reports +or perio(i"al reporting +or te priary event02 easureent .?alue  eans tat reports are sent as long as te event is +ulClle(. Priary an( se"on(ary easureent paraeters re+er to te option to use (i-erent settings +or t#o siultaneous easureents +or event02. Te aiu nuber o+ "ells in"lu(e( in a easureent report +or Event 02. eterines #eter te &easureent report +or 02 event in"lu(es bot R$RP an( R$RM in+oration or te only R$RP or R$RM as "onCgure( by te Trigger event above. Filtering "oeJ"ient use( by te /E to Clter R$RP easureents be+ore event evaluation Te easureent Clter averages a nuber o+ easureent report values to Clter out te ipa"t o+ large s"ale +ast +a(ing.

tieToTrigger02

report0ount02

aReport%ells02

reportMuantity02

Clter%oeJ"ientE/traRs rp






01 Event

Clter%oeJ"ientE/traRs r7

Filtering "oeJ"ient use( by te /E to Clter R$RM easureents be+ore event evaluation Te easureent Clter averages a nuber o+ easureent report values to Clter out te ipa"t o+ large s"ale +ast +a(ing.

a1Tresol(Rsrp

01 event is triggere( #en sour"e be"oes better tan te "onCgure( R$RP tresol( 8 0"tual Tresol( Paraeter 9146 3,.133 stan(ar(s; (B

a1Tresol(Rsr7

01 event is triggere( #en sour"e be"oes better tan te "onCgure( R$RM tresol( 8Re+er to 3,.133 stan(ar( +or R$RP Report apping; eterines #eter Event 01 is triggere( base( on R$RP or R$RM "riteria. eterines #eter te &easureent report +or 01 event in"lu(es bot R$RP an( R$RM in+oration or te only R$RP or R$RM as "onCgure( by te Trigger event above. Te aiu nuber o+ "ells in"lu(e( in a easureent report +or Event 01. Hysteresis applie( to entry an( leave "on(itions o+ Event 01. Te tieToTrigger value is te perio( o+ tie tat ust be et +or te /E to trigger a easureent report +or Event 01 eterines te reporting interval o+ a easureent report +or Event 01 eterines te nuber o+ easureent reports /E

triggerMuantity01

reportMuantity01

aReport%ells01

ysteresis01

tieToTrigger01

report*nterval01

report0ount01


%


nee(s to sen( #en Event 01 "riteria is et $*B

systeTi e*n+o %ellResele" tion Paraeters %&0 2

tiie0n(Pase$yn"%ri ti"al

ban(%lass

*(entiCes te %&09eHRP +re7uen"y ban( "lass in #i" te "arrier +re7uen"y "an be +oun( "ellResele"tionPriority Resele"tion priority o+ te "ell in te eNB. Te range is 96 #ere  in(i"ates lo#6 an(  ig in priority. tresHig TresHig o+ %&02 HRP ban( "lass B. tresLo# TresLo# o+ %&02 HRP ban( "lass B. tResele"tion$+/sageHR <eter to use P tResele"tion$+/sageHRP o+ HRP resele"tion in+oration tat is sent (o#n to $*B. tResele"tion$+/sageHRP (eterines #eter to apply a s"aling +a"tor +or HRP "ell resele"tion. tResele"tionHRP TResel"tionHRP in"lu(e( in te HRP Resele"tion in+oration sent to $*B. Te (e+ault is 6 an( "an be "ange( by te operator. tResele"tion$+HigHRP ?alue by #i" paraeter  tResele"tion%(aHrp( is ultiplie( i+ te /E is in a ig obility state as (eCne( in 3GPP T$ 3,.34 tResele"tion$+&e(iuH TResele"tion$+&e(iuHRP RP in"lu(e( in te HRP Resele"tion in+oration sent to $*B. sear"

!




R0N Paraeters

?.@ Ph$sical Cell 5dentit$ P%* is (erive( +ro t#o pysi"al layer signals Priary $yn"roni!ation $ignal 8P$$; an( $e"on(ary syn"roni!ation signal 8$$$;. Tere are )4 uni7ue P%*s. Te pysi"al9layer "ell i(entities are groupe( into 1, uni7ue pysi"al9layer "ell9 i(entity groups6 ea" group "ontaining tree uni7ue i(entities. Te grouping is su" tat ea" pysi"al9layer "ell i(entity is part o+ one an( only one pysi"al9layer "ell9i(entity group. 0 pysi"al9layer "ell i(entity is tus uni7uely (eCne( by a nuber in te range o+  to 1,6 representing te pysi"al9layer "ell9i(entity group6 an( a nuber in te range o+  to 26 representing te pysi"al9layer i(entity #itin te pysi"al9layer "ell9i(entity group.82; * 81; * "ell * 3N N N   81; * N 82; * N Ea" "ells Re+eren"e signal transits a pseu(o ran(o se7uen"e "orrespon(ing to assigne( P%*. 0n( "annel 7uality easureents are also a(e on re+eren"e signals. Tus6 an optii!e( allo"ation o+ P%*s is nee(e( to avoi( probles in "ell re"ognition or "ell sear". uring P%* planning6 one nee(s to avoi( sae P%* an( P$$ on neigboring "ell. Tis eliinates "on+usion in "ell sear" an( also re(u"es inter+eren"e #i" "an o""ur (ue to P$$ or re+eren"e signal "ollision.

?.A Root Sequence 5ndex (RS5) Te Preables use( in R0%H pro"e(ure are (erive( +ro Root $e7uen"e. Preables are obtaine( by "y"li" si+ts o+ root se7uen"e #i" are base( on Ua(o-9%u se7uen"e. Tere are 3 Root $e7uen"es available. Tere are ,4 preables available per "ell an( /E ran(oly sele"ts one preable to per+or ran(o a""ess pro"e(ure. *+ nuber o+ preables per root se7uen"e is less tan ,4 Preables6 "ontinue (eriving Preables #it net Root $e7uen"e unit ,4 preables are obtaine(. Tus6 uni7ue assignent o+ Root se7uen"e is re"oen(e( bet#een neigboring "ells. Te Belo# tables (es"ribes N"s to Uero %orrelation !one "onCguration apping an( L$& paraeter +or "onCguring R$* an( Uero "orrelation !one "onCguration paraeter.


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43 LTE eNB &aintenan"e Troublesooting &anual 41 &&B$ Operational &anual 1: LTE Optii!ation Gui(elines LTE stan(ar( (o"uentsA 3GPP T$ 3, series LTE optii!ation gui(elines Hua#ei Te"nologies LTE Optii!ation Gui(elines 0nritsu


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Huawei Troubleshooting.pdf

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