Fast Return to LTE Improvement

8/19/2019 Fast Return to LTE Improvement

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1

KTS LR14.2W170715 Fast Return to LTE improvementSep 8th 2015

NE!T"S # $ean%No&' ()RNE*!+ou,a-ar (*L"+L/!Sophie "EKRE




2

1. Feature Description

2. Interactions with other features and Upgrade rules

3. Activation Strategy in OF !etwor"

#. Assess$ent % Fast eturn &i$e

'. Assess$ent ( )erfor$ance

*. +essons learned fro$ ,all &race

-. +i$itations

. ,onclusion

A!!/0 % &ests

A!!/0 ( A1('*2#1# analysis




3

Feature Description1




4

Avoid detecting ,SF when U/ is redirected y e!ode tfor another reason than ,SF

o adio prole$ entering coverage alar$4 elow serving floor5o Offload reason reactive load control4 preventive load control5

Detect ,SF when U/ provides oth 6)re(redirection Info7Indication7 I/ in , ,O!!/,&IO! /8U/S&

Feature ,3e-tives


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5

9 )urpose of UA.1 ):13#**1 is to send U/ ac" to +&/ at ,S callafter !, has detected that U/ has connected for a ,SF reason

9 ,SF is detected y !, if ; )re(redirection Info < is not present

,O!!/,&IO! /8U/S&

170715 is ,ase on *8.1 141

If UE is LTE capable:

CsfbDetection is set toTRUE

CSFB dee!"#$ "% &'%ed #$ #)

* P,e-Red",e!"#$ "$)# IE

!#$$e!"#$Detection of fake C

I) UE ,ed",e!ed & LTE )#, ,',e'%#$

3GPP .4 UE %('// $# "$!/de I$)#

"$ RRC CONNECTION REUEST ") ,

S"de ee!UE F'% Re,$ed # LTE ") CS

VS.CsfbDetectionInRrcConn++



7

9 ,SF is detected y !, if optional ; ,SF Indication < I/ is pre,O!!/,&IO! /8U/S&

170715 ae va'ue

UE CSFB dee!"#$ "% &'%ed #$ (e* CSFB I$d"!'"#$ IE ' RRC !

Risk of non detection of tru") UE $# %66#,"$8 * CSFB I$d

3GPP .11 UE %(#/d "$!/de * CS"$ RRC CONNECTION REUEST ") ,ed",CSFB

S"de ee!UE $# F'% Re,$ed # LTE ' CS

If UE is LTE capable:

CsfbDetection is set toTRUE

VS.CsfbDetectionInRrcConn++



9

"mpa-t on (SF+ 6ete-tion at RN(LTE -: 3G ,ed",e!"#$%

CSFB N#$-CSFB ;,'d"#< #=

N# P,e-,ed",e!"#$ P,e-,ed",e!"#$I$)#

N# P,e-,ed",e!"#$ I$)# P

CSFB I$d"!'"#$

N# CSFB I$d"!'"#$N# CSFB I$d"!'"#$;B>

CSFB I$d"!'"#$

;C>

CSFB Detection based on re%reire-tio

(SF+ "n

CS S6ee!( !'// ;A>

N# CS S6ee!( !'//

Call is not a CS fallback, and 134661 featue !istakenl" fast etuns t#e UEUE does not suppot$CS%& Indication', and 1()(1* does not fast etun t#e UEUE po+ides bot# $e-ediection Info' $CS%& Indication', and 1()(1* fast etuns t#e UE .#



?

=ain

Feature ros : (ons

/10 ctual Suppot of “CSFB Indication” IE is not kno. b" 2C since it is an ptional 25 IE %ield obse+asome R9 UE don’t support it but aso some R! UE support it"

UE Types !"CSFBIndicationpresence

#re$Redirection Infopresent

!%&''!(csfbDetection)et*odCsfbDeduction,

!--!/(csfbDetection)et*odCsfbIndication,

Co00ents

1

%66#,% CSFB"$d"!'"#$

Ye%N# Red",e! Red",e!

C#@@#$ CSFB %!e$',"# ##% #) R? UE 6e,)#,@% '

2 Ye% N# Red",e! Red",e! Fe !'%e% #&%e,ed )#, &

3

N#

N# Red",e! N# Red",e!

N# ' CSFB %!e$',"#. C#@,ed",e!"#$%.R',e !'%e% #) %6ee!( !'//),#@ LTE ('% &ee$ 6e,)#,;,'d"#< ##'d>.'"$ "@6,#e@e$ "% ,e8CSFB dee!"#$ !#$e,.

4 Ye% N# Red",e! N# Red",e!

N# ' CSFB %!e$',"#.S6ee!( !'// %e6 %!e$',

5

d#e% $# %66#,CSFB "$d"!'"#$

N#

N# Red",e! N# Red",e!C#@@#$ %!e$',"# )#, $#$$# %66#,"$8 CSFB "$d"!R',e !'%e% #) R UE CSFBS"// #&%e,ed )#, ' %"8$"

7

Ye% N# Red",e! N# Red",e!

N# ' $#,@'/ CSFB %!e$'S6ee!( !'// %e6 %!e$',C'$ !#,,e%6#$d # ' CSFB!#$d""#$%.

os ConsG'"$ "% e6e!ed ") )e',e "% '!"'ed )#, R UE #$/ ;csfb7educ



9 6,SF Indication7 optional I/ has een introduced in > version 1lots of U/ currently on the field don?t support it

9 Feature is designed to e ale to activate feature in two steps

for >@ U/ only in a 1st step the only step assessed in OF F for any U/ in a 2nd step all U/ supporting ,SF Indication I/5

T;o steps a-tivation o the eature

1st step

csfbDetection#et$od CSFB Dee!"#$ ' R

R? UE R

csfbDeduction

P,e-,ed",e!"#$

I$)# $# 6,e%e$

P,e-,e

I$)# $#csfbDeduction1ndIndication

P,e-,ed",e!"#$I$)# $# 6,e%e$

CSFB I6,e

csfbIndication CSFB I$d"!'"#$6,e%e$

CSFB I6,e

8nd step

e. paa!ete




10

Interactions with other features and Upgrade rul2




11

U12 !%&''! Fast Return to 3TE at CS ca44 co0p4etionI$,#d!e% (e !'6'&"/" # ,ed",e! LTE !'6'&/e UE ' (e e$d #) ' CSFB (' '% dee!ed &'%ed CSFB ;' RRC CONNECTION "(# UE 6,#"d"$8 (e e-ediection Info IE> #, '% ' PS;' "$!#@"$8 4G-:3G RELOCATION REUEST "( R'd"# Ne#, L'e, C'%e Ee$%"#$ IE ti99eed'.

T(e P190915 'dd% %66/e@e$', #6"#$% #$ #6 #) ". ReK",ed Fe',e. S,#$8 "$e,'!"#$.

U12 !2''! 3TE to U)TS #S 56 and ce44 rese4ection en*ance0entsI$,#d!e% (e !'6'&"/" # dee! '$ "$!#@"$8 PS HO-&'%ed CSFB !'// '% ' CS %6ee!( !'// T!a;7ela"%oCsCallEstablis#!ent "@e 6e,"#d ')e, '$ "$!#@"$8 4G-:3G RELOCATION RENe#, L'e, C'%e Ee$%"#$ IE JCS %allback ti99eed' ('% &ee$ %!!e%%)// 6e,)#,@ Re!#@@e$ded Fe',e. N# "$e,'!"#$ & 8'"$ #) 190915 "% /e%% (e$ 10?771 "% e$'&/edCSFB %!e$',"# "// &e PS HO-&'%ed '$d 190915 &,"$8% "@6,#e@e$ )#, RRC-&'%ed CSFB #$

U12 272/2 i)CT1 En*anced $ Redirection to 3TE sub$featureI$,#d!e% (e !'6'&"/" # ,"88e, ' ,ed",e!"#$ # LTE #$ AO d#$%"e ),#@ DCH # FACH #, Re!#@@e$ded Fe',e. N# "$e,'!"#$ & #) "$e,e% ") 134771 '% $# ,"88e,ed de # CSFB.

U12 8<857 i=(R Step 2

I$,#d!e% (e !'6'&"/" # ,ed",e! # LTE '$ LTE !'6'&/e UE ' RRC CONNECTION "( UE 6ediection Info IE. Re!#@@e$ded Fe',e )#, LTE !'6'&/e UE !'@6"$8 #$ 3G '$d !#$$e!"$8 ),#@ Id/e @#d

I$e,'!"#$ "( 190915 "$ (e %e$%e (' "$ LR14.2M RNC d#e% $# ,"88e, ,ed",e!"#$ # LTCS%& Indication IE "$ RRC CONNECTION REUEST

=170715 intera-tions ;ith other eatures




12

At upgrade to +1#.24 the new para$eter will get the following value

adioAccessServiceBBcsfbDetection#et$od C C%)&Ded!"#$




13

Activation Strategy in OF !etwor"3




14

&he !ode cluster included 13 sites upgraded in +1#.2 and

were still in +13.3 ut feature was activated on these 1> site

$anaged at !, level.

R8C e8odeB Re/e'%e

1ORLEANSV

1 CHATEAUROUOELONLR14.2M

2ORLEANSV

1 CHATEAUROUADRONLR14.2M

3ORLEANSV

1 CHATEAUROUQIESTLR14.2M

4ORLEANSV

1

CHATEAUROUCHRISTOP

HELR14.2M

5ORLEANSV

1CHATEAUROUETATSUNIS

LR14.2M

7ORLEANSV

1 CHATEAUROUDEOLSLR14.2M

9ORLEANSV

1 ONTSRIPAULTLR14.2M

?ORLEANSV

1 ISSOUDUNHOPITALLR14.2M

ORLEANSV

1CHATEAUROUPINGAUDIERE LR14.2M

14 ORLEANSV1CHATEAUROUCE

15 ORLEANSV1CHATEAUROUCITAPS

17 ORLEANSV1CHATEAUROUCITN

19 ORLEANSV1 CHATEAUROUFT1? ORLEANSV1ISSOUDUNBASU1 ORLEANSV1 ISSOUDUNBELAIR




15

UA feature 13#**1 ; Fast eturn to +&/ at ,S call co$pletion < was

activated at +1#.2 upgrade on the FA cluster.

Activation of 1--1' ; Fast eturn to +&/ i$prove$ent < was perfor$

changing the csfDetection:ethod !, para$eter

O&e! I$%'$!e P','@ee, O/d '/e Ne '/e

RNC ORLEANSV1csfbDetection#et$od (c4ass %, CsfbDeduction

CsfbDedcation

isSib15llo.ed ,e ,e

FDDCe// C/%e, !e//%isReeaseAndRedirectionForCsFbAo%ed

true true

sib15Enable ,e ,e

O&e! I$%'$!e P','@ee, O/d '/e

FDDCe// C/%e, !e//% CellSelection<it#ioit"o=leId

Ce//P,#/eCe//Se/e!M"(P,"#,#/e0

EU,'$F,eKe$!A$dP,"#,"I

$)#L"%

Ce//Se/e!"#$M"(P,"#,"P,#/e%0EU,'$F,eKe$!A$dP,"#,"I$)#L"%0

eUtaTa9et7lCaie%e>uenc"fcn 3000

eUtaTa9et%e>uenc"?easue!ent&and.idt#

100

Ce//Se/e!"#$M"(P,"#,"P,#/e%0 eU,'T',8eD/C',,"e,F,eKe$!A,)!$ 7400eU,'T',8eF,eKe$!e'%,e@e$B'




17

Assess$ent % Fast eturn &i$e4




19

+ive tests were perfor$ed in order to co$pute the 3=(E+&/ Fast eturn &i$eto the value co$$ited with OF.

&wo "inds of tests were perfor$ed B

9 &,11B,SF(elease(F(&o(+&/ when csfDetection:ethod C csfDeductionAndIndicaStart a ,S call on #=4 U/ will fallac" to 3=4 when releasing the ,S the U/ Fast eturn

9 &,1#B,SF()S(elease(F(&o(+&/ when csfDetection:ethodCcsfDeductionAndIndStart a ,S call on #=4 U/ will fallac" to 3=4 add a )S call on 3=4 release ,S4 U/ Fastwhile )S traffic is ongoing on +&/

&wo "inds of U/ were used B

Sa$sung !# B > supporting CSFB Indication I/

Sa$sung S3 B not supporting CSFB Indication I/

Fast Return time were $easured fro$ two different perspectivesB

User perspective4 preferred y OF4 ti$e etween Disconnect $essage Tracking Area Update Complete on +&/

!etwor" perspective4 preferred y A+U4 ti$e etween last RRC Connecti$essage on 3= and Tracking Are Update Request on +&/

Fast Return Time -he-> ?1!@




1?

Fast Return Time -he-> ?2!@

Fast Return Ti0e13U




1

Fast Return Time -he-> ?!@

Results FR Tests UE NodeB SWRedirection FR

Time ORANGE (s)Redirection

Time AU(

141A170715-tivate

&,11 Sa$sung !# +1#.2 1B41 0B25

&,1# Sa$sung !# +1#.2 1B422 0B02

&,11 Sa$sung !# +13.3 1B51 0B2

&,1# Sa$sung !# +13.3 1B410 0B1<

&,11 Sa$sung S3 +1#.2 1B425 0B208

&,1# Sa$sung S3 +1#.2 1B417 0B240

All tests were co$pliant with the co$$ited OF Fast eturn &i$e of $aG 2s B




20

Assess$ent ( )erfor$ance!






22

9 Fast ate i$prove$ent is correlated with difference etween ,SF Detected




23

9 !ew screenings of ,SF Detected fro$ 6,SF Indication7 I/ are pegged >




24

9 !ew counters are pegged4 ,S oice A Setup Success ate is very good

9 !o ,S oice A setup for ,SF in elocation as )S JO +&/(E3= is not ac




25

9 !ew counters are pegged4 ,S oice A Drop ate is very good

9 !o ,S oice A drop for ,SF in elocation as )S JO +&/(E3= is not act




27

9 First ,S , ,onnection Success ate gloally stale with $ore variations a



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9 ,S ,all Setup Success ate gloally stale with $ore variations after activati



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9 First )S , ,onnection Success ate gloally stale with a te$porary deg

$arch 12(1' period




9 )S ,all Setup Success ate gloally stale with less variations after activatio




9 ,S ,all Drop gloally stale with $ore variations after activation




9 )S ,all Drop gloally stale






9 U+ )S &raffic gloally stale the wee" after activation and increased after vac




9 JSD)A &hroughput gloally stale after activation with $ore staility and an i

vacation ti$e $arch 15




9 JSU)A &hroughput gloally stale




+essons learned fro$ ,all &race"

RN( -a'' tra-e




,&g trace on !, O+/A!S1 on &hursday 12th :arch evenin

,S Speech calls traced for any U/ type

Focus on the 13#* +&/ capale U/ speech calls

Analysis of these calls ased on the co$ination of

o 6)re(redirection Info7 I/

o 6,SF Indication7 I/

=oals were to assess B Distriution of H> +&/ capale U/ )ercentage of > U/ not supporting ; ,SF Indication < I/ )ercentage of > U/ calls where oth I/ are provided y U/ )ercentage of U/ supporting ; ,SF Indication < I/

RN( -a'' tra-e

6istri,ution o R8!R< LTE -apa,'e *E



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Fro$ all +&/ capale U/ speech calls B -K > ( 13K

6istri,ution o R8!R< LTE -apa,'e *E

1346calls

116@2@

A@6(@B

Assumption for R!&R9 distribution of 'TE()*

R! UE

,!-".!/0

R9 UE,1*"22/0

1(@25

A1388B

"ni-ation 9 "E




2K of > U/ not supporting ; ,SF Indication < 2H>25

9 corresponding to 1.'K of ,SF detected 2H1#*5

!on(detection of the 2 ,SF aove is $itigated y the new detec

other ,SF scenario see neGt page5

"ni-ation 9 "E

1346calls

25 UE1(@ calls1)5 I?SI

e-ediectionInfo

13- calls 92 I?SI

CS%& Indicati144 calls 5) I?SI

CS%& Indicati2 calls 2 I?SI

CSFB Detection based on re%reire-tion "no 9 not present

(SF+ "ni-ation 9 present

R< *E -a''s ;here ,oth "E are provie




4 calls oserved with ; )re(redirection Info < and ; ,SF Indicat

provided y U/

9 these 4 calls $itigate the 2 non(,SF detections

&his call scenario is proaly due to engaged ,SF as per U/ p

for which the +&/(E3= redirection is not properly co$pleted

9 , ,O!!/,&IO! /+/AS/ with ; redirected,arrierInfo < not receiv

R< *E -a''s ;here ,oth "E are provie

1346calls

25 UE1(@ calls

re%reire-tion "no 9 not

present


3CS%& Indicati

8@CS%& Indicati

144CS%& Indicati

8CS%& Indicati

*2e-ediection Info

146e-ediection Info

R8 *E supportin (SF+ "ni-ation 9 "




41

+ots of U/ do support > ; ,SF Indication < I/ B -'K of De

9 still 2'K or U/ do not 2#3H>>5

!etwor" is not $ature enough to activate 1--1' feature for U

R8 *E supportin (SF+ "ni-ation 9 "

1346calls

2@ UE116@ calls

3CS%& Indicati

1(4CS%& Indicati

.3.CS%& Indicati

23*CS%& Indicati

1(@e-ediection Info

995e-ediection Info re%reire-tion "no 9 not

present





42

+i$itations#

Feature 'imitations # oor LTE -overae




43

In case of poor +&/ coverage or +&/ cells loaded4 proaifailure during the redirection to +&/ $ay increase

o 3=(E+&/ , redirection eing triggered in lind $ode not $eased5o If no suitale cell on indicated +&/ freLuencyies5 is found withiatte$pt to ca$p on any suitale cell on any other availale +&/ fapplicale.o If no +&/ coverage is availale4 U/ can spend up to 2s searchefore co$ing ac" to 3=.For such areas4 reselection should e preferred4 avoiding a pot

period when U/ cannot e paged nor perfor$ traffic.

A way to avoid this would e to ea-tivate the eature onareas ;ith poor LTE -overae

edirection to +&/ on AO DownsiMe < can also e disaled on

Feature 'imitations oor LTE -overae

#Fast Return




44

In case Fast eturn to +&/ feature 13#**15 is not activatewhole !S4 so$e U/4 the ones having perfor$ed a ,SF4 wredirected to +&/ if ,S call co$pletion ta"es place after a )ri,hange to a cell where Fto+&/ is not activated

&his will degrade the Fast eturn Success ate

A way to avoid this would e to a-tivate the eature on a'o same RNS for which we "now that +&/ coverage is good ethe sa$e serving area

As for +13.34 Fto+&/ is still not triggered after Iur $oo Inter(!S )ri$ary ,ell ,hangeo S!S relocation scenario

&hese two scenarios will e covered y +1'.3 feature 1->21'

to +&/ /nhance$ents

Fast Return




45

,onclusion$

(on-'usion




47

U/ traces have shown that feature ehaves as eGpected!ew counters were peggedFeature )ros N ,ons B

@ no ,SF detection for non(,SF +&/(E3= redirectionCE no Fast eturn if suseLuent non(,SF ,S call ends

@ Fast eturn if oth ; )re(redirection Info < N ; ,SF Ind

are provided y U/

( ,SF not detected and Fast eturn not triggered if U/ dprovide ; ,SF Indication < B

9 U/ B $itigated y choosing CsfbDeductionAndIndication CsfbIndication

9 > U/ B li$ited y the low Luantity of such U/ and availailit; edirection to +&/ on AO DownsiMe < feature

(on-'usion




49

A!!/0 % &ests

Test -tivities




4?

9+a &ests at ,//!!/S fro$ 'th to 1>th Feruary 21'

9+ive &ests at ,JA&/AUOU0 fro$ 2nd to 1#th :arch 21'

9&hree $oiles have een used

o

&wo )re(el> U/SA:SU!= S# during +a &ests

SA:SU!= S3 during +ive &ests

&hose U/ are not supporting the optional ; ,SF Indication < I/

o One el> U/

SA:SU!= !ote# during +aH+ive &ests

&his U/ is supporting the ; ,SF Indication < I/

9!ote aout the live tests nu$er B

o &ests 34 -4 114 1# and 1* have een eGecuted 2 ti$es

First ti$e with +1#.2 !ode sites

Second ti$e with +13.3 !ode sites

Test List ?1!2@




4

Test Objective

Test1 Verify that csfbDetectionMethod parameter can be set to different va!es via "O and onine modification

Test$%&'B()eease(')(To(LTE *hen csfbDetectionMethod + csfbDed!ction (, -re()e. M&&tart a %& ca from /0 2E *i fabac3 to 45 then *hen reeasin0 %& ca 2E 'ast )et!rns to LTE

Test3CSFB-Release-FR-To-LTE when csfbDetectionMethod = csfbDeductionAndIndication - !"e-Rel# MSSta"t a CS call f"o$ %&' (E will fallbac) to 3*' then when "eleasin& CS call' (E Fast Retu"ns to LTE

Test/ Verify that -re()EL. 2E does not ') to LTE after %&'B *hen csfbDetectionMethod+csfbIndication

Test6verify that a non(c&'BIndication 2E can not be identified as %&'B and *i not fast ret!rn to LTE %&'B*hen csfbDetectionMethod+csfbIndication and a -& ca is added on 2MT&

Test7verify that a non(c&'BIndication 2E can not be identified as %&'B and *i not fast ret!rn to LTE %&'B*hen csfbDetectionMethod+csfbIndication and -& reocation is performed8

Test+

!S-then-CSFB-Release-FR-To-LTE when csfbDetectionMethod = csfbDeductionAndIndication - !"e-Rel# MSSta"t a !S call f"o$ %*' add a CS call' (E will fallbac) to 3*' "elease CS call' (E Fast Retu"ns to LTE while !S t"aon&oin& on LTE

Test9

%&'B(-&()eease(')(To(LTE *hen csfbDetectionMethod + csfbDed!ction (, -re()e. M&&tart a %& ca from /5 2E *i fabac3 to 45 start a -& ca reease %& ca 2E 'ast )et!rns to LTE*hie -& traffic is on0oin0 on LTE

Test.

%&'B(-&()eease(')(To(LTE *hen csfbDetectionMethod + csfbDed!ctionAndIndication (, )e. M&&tart a %& ca from /5 2E *i fabac3 to 45 start a -& ca reease %& ca 2E 'ast )et!rns to LTE*hie -& traffic is on0oin0 on LTE

Test. bis

%&'B(-&()eease(')(To(LTE *hen csfbDetectionMethod + csfbDed!ctionAndIndication (, -re()e. M&&tart a %& ca from /5 2E *i fabac3 to 45 start a -& ca reease %& ca 2E 'ast )et!rns to LTE*hie -& traffic is on0oin0 on LTE

Test1: Verify that -ost()EL. 2E a*ays redirects to LTE after %&'B *hen csfbDetectionMethod+csfbDed!ction

Test11CSFB-Release-FR-To-LTE when csfbDetectionMethod = csfbDeductionAndIndication - Rel! MSSta"t a CS call on #$% &E will fallbac' to ($% when "eleasin) the CS the &E Fast Retu"ns to LTE

Test List ?2!2@




50

Test Objective

Test1$ Verify that -ost()EL. 2E a*ays redirects to LTE after %&'B *hen csfbDetectionMethod+csfbIndication

Test14

%&'B(-&()eease(')(To(LTE *hen csfbDetectionMethod+csfbDed!ction (, )e. M&&tart a %& ca on /5 2E *i fabac3 to 45 add a -& ca on 45 reease %& 2E 'ast )et!rns to LTE*hie -& traffic is on0oin0 on LTE

Test1#

CSFB-*S-Release-FR-To-LTE when csfbDetectionMethod=csfbDeductionAndIndication - Rel! MSSta"t a CS call on #$% &E will fallbac' to ($% add a *S call on ($% "elease CS% &E Fast Retu"ns to LTE

while *S t"affic is on)oin) on LTE

Test16

%&'B(-&()eease(')(To(LTE *hen csfbDetectionMethod+csfbIndication (, )e. M&&tart a %& ca on /5 2E *i fabac3 to 45 add a -& ca on 45 reease %& 2E 'ast )et!rns to LTE*hie -& traffic is on0oin0 on LTE

Test,

!S-CSFB-Release-FR-To-LTE when csfbDetectionMethod=csfbDeductionAndIndication - Rel# MSSta"t with a !S call on %*' then $a)e a CS call as well' (E will fallbac) to 3*' when "eleasin& this CS' (E FaRetu"ns to LTE while !S t"affic is on&oin& on LTE

Test1;

-&(%&'B()eease(')(To(LTE *hen csfbDetectionMethod+csfbIndication (, )e. M&&tart *ith a -& ca on /5 then ma3e a %& ca as *e 2E *i fabac3 to 45 *hen reeasin0 this %& 2E 'ast)et!rns to LTE *hie -& traffic is on0oin0 on LTE

Test19

-&(%&'B()eease(')(To(LTE *hen csfbDetectionMethod+csfbDed!ction (, )e. M&&tart *ith a -& ca on /5 then ma3e a %& ca as *e 2E *i fabac3 to 45 *hen reeasin0 this %& 2E 'ast)et!rns to LTE *hie -& traffic is on0oin0 on LTE

Test1.Verify that -ost()EL. 2E does not ') to LTE *hen a -& ca is redirected to 45 d!e to ost ofradio contact *ith LTE ca!se and %& ca is then made

Test$:Verify that -re()EL. 2E does not ') to LTE *hen a -& ca is redirected to 45 d!e to ost ofradio contact *ith LTE ca!se and %& ca is then made

')<Time<%1 %omp!te the 'ast )et!rn To LTE Time= )epeat ; times the test T%11 and do the test T%1/ 1$ times &AM&2>5

')<Time<%$ %omp!te the 'ast )et!rn To LTE Time= )epeat ; times the test T%11 and do the test T%1/ 1$ times &AM&2>5 &

Test on Live Net;or>




51

9+ive tests oectives were to

o /Gecute so$e functional test cases on the live conteGt

o ,o$pute the Fast eturn &i$e

9&he Fast eturn &i$e ,o$putation has een done with the following&est11 N 1# were repeated several ti$es4 U/ logs collected and infor$ation

transition ti$e was eGtracted

9Fast Return time were $easured fro$ two different perspectivesB

User perspective4 preferred y OF4 ti$e etween Disconnect $essage Tracking Area Update Complete on +&/

!etwor" perspective4 preferred y A+U4 ti$e etween last RRC Connecti$essage on 3= and Tracking Are Update Request on +&/

+1#.2 !ode tests have een done on ,hateaurouG ,hristophe site

+13.3 !ode tests have een done on ,hateaurouG F& site

Several roa$ing drives have een done in ,hateaurouG with oth Sa$sung

Lo-a' Fie' (oniuration "mpa-ts




52

9It has een oserved on the FA area that so$e Fto+&/ weretriggered after ,SF in the following scenario B

+&/ to 3= ,SF was perfor$ed on a 3= site A

,SF was detected and counted as such on site A U/ $oved to another site when connected to 3=

,S call was co$pleted on a 3= site where Fto+&/ was not tr

9Fto+&/ was not triggered due to one of the following causes

3= site coverage was not overlapped y sufficient +&/ coverag

Fast eturn feature was not activated on 3= site

9,onseLuence was a igger difference at !ode cluster level o the nu$er of ,SF detected

o the nu$er of Fast eturn triggered

Fast eturn &i$e ,o$putationSA:SU!= ! t # +1# 2 ! d Sit 1H25




53

Results FR Tests Time %&isconnect% Time%TAU 'omlete%Redirection FR Time

ORANGE (s)Time lst %RR'

'onnection Relese% Time%TAU Re*

170715-tivate

&,11 ( &ry1 1'B-B3-B3> 1'B-B3B>33 1.44 1'B-B3B>' 1'B-B3B3

&,11( &ry2 1'B>B23B3'1 1'B>B2#B-2> 1.78 1'B>B2#B-- 1'B>B2#B3

&,11( &ry3 1'B1'B11B12* 1'B1'B12B' 1.74 1'B1'B11B-2> 1'B1'B12B

&,11( &ry# 1'B1-B22B*-* 1'B1-B2#B#- 1.71 1'B1-B23B22 1'B1-B23B#

&,11( &ry' 1'B1>B2'B2* 1'B1>B2*B##* 1.18 1'B1>B2'B-2 1'B1>B2'B>

&,11( &ry* 1'B21B1'B* 1'B21B1*B3- 1.01 1'B21B1'B**' 1'B21B1'B>

&,11( &ry- 1'B23B13B1> 1'B23B1#B'2# 1.4 1'B23B13B-3- 1'B23B13B>

=oCenne T(11%7 1.41

SA:SU!= !ote# on +1#.2 !ode Sites 1H25

9 Fast eturn ti$e OF co$$it$ent of $aGi$u$ 2 seconds has ee

particular test case.

Fast eturn &i$e ,o$putationSA:SU!= ! t # +1# 2 ! d Sit 2H25




54

Results FR TestsTime

%&isconnect%Time%TAU 'omlete%

Redirection FR TimeORANGE (s)

Time lst %RR''onnection Relese%

TimRe

170715-tivat

e

&,1#( &ry1 1'B3#BB-* 1'B3#B1B32 1.75 1'B3#BB>21 1'B3#

&,1#( &ry2 1'B3#B2>B2*1 1'B3#B3B'1 1.24< 1'B3#B2>B* 1'B3#

&,1#( &ry3 1'B3'B33B>*1 1'B3'B3'B-11 1.75 1'B3'B3#B'>> 1'B3'

&,1#( &ry# 1'B3-B2B12' 1'B3-B2>B3> 1.25 1'B3-B2B*>* 1'B3-

&,1#( &ry' 1'B3B22B32- 1'B3B23B--# 1.447 1'B3B22B>13 1'B3

&,1#( &ry* 1'B3B'-B>3 1'B3B'>B2># 1.<1 1'B3B'B#2# 1'B3

&,1#( &ry- 1'B3>B32B#' 1'B3>B3#B11# 2.0< 1'B3>B33B### 1'B3>

&,1#( &ry 1'B#B1'B- 1'B#B1*B1'1 1.144 1'B#B1'B#>1 1'B#

&,1#( &ry> 1'B#B#*B3#2 1'B#B#-B* 1.4 1'B#B#*B>- 1'B#

&,1#( &ry1 1'B#1B3B*#> 1'B#1B31B-3 1.14 1'B#1B31B13> 1'B#1

&,1#( &ry11 1'B#2B23B#2* 1'B#2B2#B'>2 1.1 1'B#2B23B>>* 1'B#2

&,1#( &ry12 1'B#3B#-B##3 1'B#3B#B-># 1.51 1'B#3B#-B>>3 1'B#3

=oCenne T(14%12 1.422

SA:SU!= !ote# on +1#.2 !ode Sites 2H25

Fast eturn &i$e ,o$putationSA:SU!= !ote# on +13 3 !ode Sites




55





Time%Re*u

170715-tivat

e

&,11 ( &ry1 12B'-B>B2>1 12B'-B1B'3 1.212 12B'-B>B' 12B'-B1

&,11( &ry2 13BB2#B3'2 13BB2'B* 1.4 13BB2#B* 13BB2

&,11( &ry3 13B3B2>B* 13B3B31B- 1.281 13B3B3B32 13B3B3

&,11( &ry* 13B11B#>B>3 13B11B'1B##' 1.42 13B11B'B'33 13B11B'

&,11( &ry- 13B1#B32B#' 13B1#B33B-*> 1.4 13B1#B32B>>' 13B1#B3

=oCenne T(11%5 1.51

&,1#( &ry1 13B1B3-B33* 13B1B3B'>3 1.157 13B1B3-B>3' 13B1B3

&,1#( &ry 13B2*B#'B'* 13B2*B#-B'> 1.7 13B2*B#*B3' 13B2*B#

&,1#( &ry> 13B2-B1B23 13B2-B11B*>* 1.41 13B2-B1B>** 13B2-B1

&,1#( &ry1 13B2-B#2B'3# 13B2-B#3B-1 1.7 13B2-B#3B21> 13B2-B#

=oCenne T(14%4 1.41

SA:SU!= !ote# on +13.3 !ode Sites

Fast eturn &i$e ,o$putationSA:SU!= S3 on +1# 2 !ode Sites 1H25




57

Results FR Tests Time %&isconnect% Time%TAU 'omlete%Redirection FR Time

ORANGE (s)Time lst %RR'

'onnection Relese%Time%TAU Re*

170715-tivate

&,11 ( &ry1 11B12B3-B*33 11B12B3>B#' 1.412 11B12B3B3># 11B12B3B*#

&,11( &ry2 11B1>B1#B>-- 11B1>B1*B> 1.112 11B1>B1'B*-# 11B1>B1'B-

&,11( &ry3 11B21B'1B-12 11B21B'3B32 1.08 11B21B'2B#> 11B21B'2B*

&,11( &ry# 11B2'BB-*1 11B2'B2B2>1 1.5 11B2'B1B*-1 11B2'B1B

&,11( &ry' 11B2-B''B>'# 11B2-B'-B2'* 1.02 11B2-B'*B*#3 11B2-B'*B

&,11( &ry* 11B31B2*B3# 11B31B2-B#-2 1.48 11B31B2*B-# 11B31B2-B#

&,11( &ry- 11B3#B2#B2 11B3#B2'B*2 1.574 11B3#B2'B22* 11B3#B2'B#

=oCenne T(11%7 1.425

SA:SU!= S3 on +1#.2 !ode Sites 1H25

Fast eturn &i$e ,o$putationSA:SU!= S3 on +1# 2 !ode Sites 2H25




59





TimeRe*

170715-tivat

e

&,1#( &ry1 11B#2B-B33* 11B#2BB-* 1.45 11B#2BB'1 11B#2B

&,1#( &ry2 11B#2B#2B2#- 11B#2B#3B'- 1.1 11B#2B#3B3# 11B#2B

&,1#( &ry# 12B13B1#B3# 12B13B1'B33 1.485 12B13B1'B12 12B13B

&,1#( &ry' 12B13B2*B1 12B13B2B-> 1.<08 12B13B2B33# 12B13B

&,1#( &ry* 12B13B'2B1-- 12B13B'3B'3> 1.2 12B13B'2B- 12B13

&,1#( &ry- 12B1#B2B#> 12B1#B21B>23 1.425 12B1#B21B3* 12B1#B

&,1#( &ry 12B1#B#'B'2' 12B1#B#*B>1 1.< 12B1#B#*B2*3 12B1#B

&,1#( &ry> 12B1'B1B>-3 12B1'B12B3*' 1.<2 12B1'B11B*>' 12B1'

&,1#( &ry1 12B1'B3*B'2 12B1'B3-B#3# 1.82 12B1'B3*B> 12B1'B

&,1#( &ry11 12B1'B'>B2> 12B1*B1B132 1.0 12B1*BB'' 12B1*B

&,1#( &ry12 12B1*B3B2>* 12B1*B3>B#'2 1.15 12B1*B3B# 12B1*B

=oCenne T(14%12 1.417

SA:SU!= S3 on +1#.2 !ode Sites 2H25

&,1# ,all Flow % 80D: trace in +a 1H125Using > U/ SA:SU!= !# supporting 6,SF Indication7 I/




5?

Using > U/ SA:SU!= !# supporting ,SF Indication I/

UE sta





5


eode& ediects UE to 3G cai





70


UE connects to 3 po+ides CS%& in 22C CECT

&,1# ,all Flow % 80D: trace in +a #H125Using > U/ SA:SU!= !# supporting 6,SF Indication7 I/




71


UE sendin9 C? Se+ice 2e>uesfo CS speec# call setup

&,1# ,all Flow % 80D: trace in +a 'H125Using > U/ SA:SU!= !# supporting 6,SF Indication7 I/




72


End-to-end +oice pat# is setup

&,1# ,all Flow % 80D: trace in +a *H125Using > U/ SA:SU!= !# supporting 6,SF Indication7 I/




73


7 Ct; acti+ation e>uest fo S call to be setup

&,1# ,all Flow % 80D: trace in +a -H125Using > U/ SA:SU!= !# supporting 6,SF Indication7 I/




74


7 Ct; acti+ated

&,1# ,all Flow % 80D: trace in +a H125Using > U/ SA:SU!= !# supporting 6,SF Indication7 I/




75

g pp g

UE eleases t#e speec# call

&,1# ,all Flow % 80D: trace in +a >H125Using > U/ SA:SU!= !# supporting 6,SF Indication7 I/




77

g pp g

UT2 %ast 2etuns t#e UE to LTEt#ou9# an 22C 2ediection pocedue





79

g pp g

UE e9istes at connection to LTE





7?

g pp g

UE connects to LTfo i9inatin9 Ca





7

2esu!ption of suspended ES beaes

A!!/0 A1 '*2#1# analysis




90

A!!/0 % A1('*2#1# analysis




91

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Fast Return to LTE Improvement