LTE UMTS GSM Network Optimization

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Batelco LTE IRAT Interworking Document

Batelco LTE IRAT InterworkingDocument

IRAT Interworking Optimization June 2013

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Table of Contents

1 Introduction.......................................................................................5

2 Purpose.............................................................................................5

3 Benefits.............................................................................................5

4 Service Description..........................................................................6

5 !clusions........................................................................................."

6 #esponsibilit$ %atri!........................................................................&

" 'i() *evel Desi(n.............................................................................+

#$1 Intro%uction$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$2 Interworking De'ign (on'i%eration'$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$10#$3 Interworking De'ign )et*o%olog+$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$11#$! Interworking mo%e'$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$11#$, (ell Re'election - LTE to .(D)A/) I%le mo%e"$$$$$$$$$$$$$$$$$$$$$$$12

#$,$1 Tec*nolog+ rioritization 12#$,$2 IRAT )ea'urement' 12#$,$3 (ell Re'election 13

#$ (ell Re'election - .(D)A to LTE I%le )o%e"$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$1,#$$1 Tec*nolog+ rioritization 1,#$$2 IRAT )ea'urement' 1#$$3 (ell Re'election 1#

#$# (ell Re'election - ) to LTE/.(D)A I%le )o%e"$$$$$$$$$$$$$$$$$$$$$$$14#$#$1 Tec*nolog+ rioritization 14#$#$2 IRAT )ea'urement' 14#$#$3 (ell Re'election 1&

#$4 (o5erage Triggere% .(D)A e''ion (ontinuit+$$$$$$$$$$$$$$$$$$$$$$$$$$$$$20#$4$1 Intro%uction 20#$4$2 Operation 21

#$& (o5erage Triggere% .(D)A IRAT 6an%o5er$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$23#$&$1 Intro%uction 23#$&$2 Operation 2!

#$10 (o5erage Triggere% ERA7 e''ion (ontinuit+$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$2##$10$1 Intro%uction 2#

#$10$2 Operation 24

& Test Case Develop,ent..................................................................31

+ -ield Tests.......................................................................................32

1 /0 *evel #eco,,endations.........................................................36

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11 -uture trial reco,,endations.......................................................36

12 ppendi!.........................................................................................3"12$1 Brie8 %e'cription' 8or IRAT Relate% 9eature'$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$3#

12$1$1 .(D)A IRAT 6an%o5er: co5erage triggere% 3#

12$1$2 ERA7 e''ion (ontinuit+: (o5erage;Triggere% 3412$1$3 .(D)A e''ion (ontinuit+: (o5erage;Triggere% 3&

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1 Intro%uction

Batelco i' t*e 8ir't operator to launc* LTE 'er5ice' in Ba*rain$ T*e rollout i' ongoingwit* more t*an &0 'ite' integrate% out o8 t*e initial 100 8or t*e 8ir't p*a'e: w*ile

preparation' 8or 'econ% p*a'e o8 100 a%%itional 'ite' are un%erwa+$ It *a' ualit+ o8 'er5ice$

2 urpo'e

T*e purpo'e o8 t*i' %ocument i' to pro5i%e gui%eline' 8or t*e LTE IRAT Interworking

Optimization 8or Batelco network$ It pro5i%e' recommen%ation' 8or %eplo+ment

option': ke+ parameter': te't met*o%olog+ an% per8ormance metric'$

3 Bene8it'

A' 2/3 network' e5ol5e to !: a ke+ re>uirement 8or operator' i' to pro5i%e a

'eamle'' e=perience 8or t*eir cu'tomer'$

A' in t*e ca'e o8 Batelco: LTE *a' initiall+


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High Level Design

Test Case

Development

Field Tests

NW Level

Recommendations


I. can al'o pro5i%e a mean' to mo't e88icientl+ le5erage t*e increa'e% capacit+ o8

LTE 8or *ig*er tra88ic area': an% alle5iate conge'tion on 2 an% 3 network'$

! er5ice De'criptionT*e LTE IRAT Interworking Optimization i' a part o8 t*e on;going Optimization

er5ice 8or Batelco 7etwork$ T*e LTE Interworking 'er5ice %raw' upon Eric''on?'

LTE tec*nical e=pert' to %eli5er a *ig*l+ 'pecialize% 'er5ice 8or t*e %eli5er+ o8 an

interworking 'olution t*at can


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6ig* Le5el De'ign

During t*e *ig* le5el %e'ign p*a'e:


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, E=clu'ion'

T*i' %ocument co5er' RA7 con'i%eration' 8or LTE Interworking onl+:


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# 6ig* Le5el De'ign

#$1 Intro%uction

A well optimize% I. %e'ign will ena


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Implementation o8 recommen% c*ange' to impro5e per8ormance e$g$

network;controlle% i%le mo%e cell re'election: a5aila


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)inimize t*e 8re>uenc+ o8 inter;RAT *an%o5er an% impro5e t*e u'er perception o8

network 'ta


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#$, (ell Re'election - LTE to .(D)A/) I%le mo%e"

(ell re'election 8rom LTE to .(D)A in i%le mo%e i' a Relation$cellRe'electionriorit+

Ftran9re>uenc+Relation$cellRe'electionriorit+

eran9re>roupRelation$cellRe'electionriorit+

LTE tec*nolog+ *a' Relation$cellRe'electionriorit+ i' 8i=e% a' #$

i5en t*at .(D)A compri'e' two carrier' on Batelco 7etwork: cell re'election

priorit+ i' kept a' , *ig*er" 8or t*e 8ir't carrier FAR9(7 1034" an% i' kept a' !

lower" 8or t*e 'econ% carrier FAR9(7 102"$ T*i' 'trateg+ i' place% 'ince t*e 8ir't

carrier o88er'


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".5.2 I#T %easure,ents

.*en it come' to lower priorit+ 8re>uencie': t*e parameter snonintrasearch

%etermine' i8 t*e FE nee%' to mea'ure at all$ )ea'urement' are man%ator+ onl+

w*en r=le5 i' uire% RR le5el 8or

camping on t*e LTE cell$ (urrentl+ t*i' i' 'et to ;124%Bm$

LTE parameter '7onIntraearc* '*oul%


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er5ing LTE cell RR R=Le5)in HEFtran(ell9DD K

t*re'*er5ingLow

Target .(D)A cell R( aR=Le5)in HFtran9re>Relation K

t*re'*Low

-i(ure 5- LTE to .(D)A re'election

I8 more t*an one .(D)A cell meet' t*e cell re'election criteria ar=le5minHutran8re>relation wit* t*e actual parameter

5alue' on 3 'i%e an% intro%uce t*re'*Low a' %B to a5oi% re'election attempt' at

too low 3 'ignal 'trengt* an% a5oi% an+ 'uuenc+ i' per8orme%


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er5ing LTE cell RR R=Le5)in HEFtran(ell9DD K

t*re'*er5ingLow

Target .(D)A cell R( i' /TaR=Le5)in HFtran9re>Relation K

t*re'*Low

Target ) cell R=Le5 i' aR=Le5)in Heran9re>roupRelation K

t*re'*Low

I8 more t*an one ) cell meet' t*e cell re'election criteria auire% 'o a' to 'a5e 'canning ) 1400 w*ere it i' not pre'ent$

#$ (ell Re'election - .(D)A to LTE I%le )o%e"(ell re'election 8rom .(D)A to LTE 9AJ 121 1!#!" i' an optional 8eature allowing

a FE campe% on .(D)A to re'elect to an LTE cell$

(ell re'election 8rom .(D)A to LTE i' 'upporte% uencie' an% t*e parameter' 8or

cell re'election are 'ent on t*e


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A' auenc+ in8ormation i'


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In goo% .(D)A ra%io en5ironment: t*e re>uire% LTE 8re>uenc+ %etection

mea'urement rate i' low at lea't once e5er+ 0 'econ%'" an% applie' onl+ to *ig*er

priorit+ LTE 8re>uencie'$

In in8erior .(D)A ra%io en5ironment: re>uire% LTE 8re>uenc+ %etectionmea'urement rate i' %ou8%%mea'in%icator an%

8ac*mea'occac+clencoe88 an% compile re'ult' 8or IRAT moR=Le5)inHEutran9re>Relation

@r=le5mea' i' t*e RR le5el o8 t*e LTE cell mea'ure% R=Le5)in HEutran9re>Relation in%icate' t*e minimum re>uire% RR le5el 8or

camping on t*e LTE cell$

I8 more t*an one LTE cell meet' t*e criteria 8or cell re'election: t*e FE '*all re'elect

t*e LTE cell wit* t*e *ig*e't r=le5 le5el among t*e cell' meeting t*e criteria on t*e

*ig*e't a


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.(D)A to LTE cell re'election to a *ig*er priorit+ LTE 8re>uenc+ i' per8orme% R=Le5)in

Kt*re'*6ig* %uring treelection 'econ%'$

-i(ure 6- .(D)A to LTE re'election

F'ing t*e current parameter 5alue': t*e FE will re'elect 8rom .(D)A to LTE cell

w*en LTE RR i' a


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".".1 Tec)nolo($ Prioritiation

Tec*nolog+ prioritization *an%le' t*e camping o8 FE i8 more t*an one tec*nolog+ *a'

'u88icientl+ goo% 'ignal >ualit+$ B+ 'etting t*e tec*nolog+ priorit+: operator can %e8ine

a 'trateg+ 8or 'u


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It i' recommen%e% to c*ange @RLEM)I7E 8rom 0 ;1!0%Bm" to ;124%Bm" an%

6RIOT6R 8rom to , 'o t*at LTE cell i' c*o'en onl+ w*en cell RR i' uenc+ occur' w*enC;

R( @RLEM)I7F K 6RIOT6R

9or Batelco 7etworkC

@RLEM)I7F G 0 ;11& %Bm"

6RIOT6R G 2 !%B"

A F)T cell i' onl+ 'electe% i8 t*e >ualit+ mea'urement (I(6 Ec/7o i' a


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.(D)A e''ion (ontinuit+ 9AJ 121 0!&3" i' an optional 8eature t*at allow' a FE in

RR((onnecte% mo%e in t*e re>ui'ite co5erage con%ition' to uipment FE" in RR((O77E(TED

mo%e towar%' a .(D)A network w*en t*e FE mea'ure' poor co5erage in

t*e current LTE 8re>uenc+$ Re%irection i' controlle% uenc+ wit*in t*e LTE network wit* poor LTE

co5erage$ I8 t*e FE i' e5entuall+ relea'e%: it i' re>uire% to per8orm i%le mo%e cell

re'election to mo5e to a .(D)A network$ T*i' interruption time ma+


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9or Batelco 7etwork: EFtran9re>Relation$connecte%)o%e)oRelation$connecte%)o%e)o


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Re8erence ignal Recei5e% @ualit+ RR@": pro5i%ing an in%ication o8 t*e

re8erence 'ignal >ualit+: e'peciall+ *ig* inter cell inter8erence

T*e e7o%eB will con8igure two E5ent A2 mea'urement' in t*e FE to %etect poor

co5erage: an% u'ing t*e %e8ault 'etting': one o8 t*em will


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In a%%ition: t*e (o5erage;Triggere% .(D)A IRAT 6an%o5er 8unction can al'o


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9ollowing %eci'ion proce'' i' *an%le% a8ter e5ent A2$

-i(ure +- Deci'ion roce'' a8ter E5ent A2

T*e (o5erage;Triggere% .(D)A e''ion (ontinuit+ 8eature u'e' t*e E5ent A2

'er5ing cell uencie' LTE or

ot*er RAT'" are target can%i%ate' 8or tran'8erring t*e FE$

I8 t*e *ig*e't prioritize% 8re>uenc+ t*at t*e FE can *an%le *a' capauenc+: t*e RB can %o one o8 t*e 8ollowing two action'C

.*en t*e FE %oe' not *a5e 5oice


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T*e (o5erage;Triggere% .(D)A IRAT 6an%o5er 8eature e=ten%' t*i' wit* t*e

8ollowing two new option'C

Imme%iatel+ initiate a *an%o5er 8or t*e FE to a cell on t*e target .(D)A

8re>uenc+ t*at i' known


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Currentl$ Covera(e Tri((ered I#T ' to 0CD% is not activated in Batelco

net7or?. bove para,eters are reco,,ended for a trial before a /0 7ide

i,ple,entation is carried out.

#$10 (o5erage Triggere% ERA7 e''ion (ontinuit+

".1.1 Introduction

T*e (o5erage;Triggere% ERA7 e''ion (ontinuit+ 8eature pro5i%e' uenc+$ Re%irection i' controlle%


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A *ig*er prioritization o8 LTE an% .(D)A to ERA7 i' %e'ire% an% 'etta


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9ollowing %eci'ion proce'' i' *an%le% a8ter e5ent A2$

-i(ure 12- Deci'ion roce'' a8ter E5ent A2

-or BTC /et7or? ue%easure,entctive@-alse so blind release 7it) redirect

s)all be done to t)e )i()est priorit$ tec)nolo($ after *T i.e 0CD%.

It i' recommen%e% to make ue)ea'urementActi5eGTrue an% con8igure E5ent B2

t*re'*ol%' propo'e% a' 8ollowingC

Para,eter /a,e Para,eter Description nitDefault>alue

Prop>a

a,B2)o


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trigger@uantit+B2T*e >uantit+ 8or t*re'*ol%1 'er5ing EFTRA7 cell" t*at i' 'ent to

t*e FE: an% i' u'e% toget*er wit* t*re'*ol%2 to trigger t*ee5entB2$

RR R

trigger@uantit+FtraB2T*e >uantit+ 8or t*re'*ol%2 neig*


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4 Te't (a'e De5elopment

9ollowing te't ca'e' *a5e


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& 9iel% Te't'

9ollowing re'ult' *a5e


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u


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u


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u


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10 7. Le5el Recommen%ation'

Attac*e% 8ile *a' all t*e con'oli%ate% network le5el recommen%ation' ma%e in t*i'%ocument$

Rele5ant c*ange' *a5e


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12 Appen%i=

12$1 Brie8 %e'cription' 8or IRAT Relate% 9eature'

Below are '*ort %e'cription' o8 Batelco LTE 8eature' u'e% %uring LTE IRAT

Interworking Optimization$ 9urt*er %e'cription' o8 relate% parameter' can


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In a%%ition: t*e (o5erage;Triggere% .(D)A IRAT 6an%o5er 8unction can al'o uenc+ wit*in t*e LTE network wit* poor LTE


re'election to mo5e to a ERA7 network$ T*i' interruption time ma+


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e''ion tran'ition to a ERA7 network i' po''iuenc+$ Re%irection i' controlle% uenc+ wit*in t*e LTE network wit* poor LTE


re'election to mo5e to a .(D)A network$ T*i' interruption time ma+


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er5ice per8ormance 8or an in%i5i%ual FE i' en*ance%

LTE UMTS GSM Network Optimization

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