rn3701 rn3701 3g ran nsn optimization fundamentals

7/24/2019 RN3701 RN3701 3G RAN NSN Optimization Fundamentals

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RN3701RN3701RN3701RN3701 –––– 50A50A50A50A

18/08/20151 © Nokia 2014 RN3701 - RU50

• RAN KPI categories and ea!"#es



Module ObjectivesModule ObjectivesModule ObjectivesModule Objectives

At t$e end o% t$e !od&#e 'o& (i## )e a)#e to*

• Ana#'+e t$e %or!&#as o% i!"ortant ea!"#e KPIs %ro! t$e ,ario&s KPIcategories

© Nokia 2014 RN3701 - RU5018/08/20152

data



ContentContentContentContent

• KPI ea!"#es

- Accessi)i#it'- Retaina)i#it' .ro" Rate

- Usage- o)i#it'- &a#it'

18/08/20153 © Nokia 2014 RN3701 - RU50



• .e%inition RR connection ser,ice #e,e# !eas&re!ents 1001

RRC Connection SetupRRC Connection SetupRRC Connection SetupRRC Connection Setup

UE

RRC: Connection Request

RRC Connection Setup phase

Resource Reservation in RNC, BTS, Transmission

BTS RNC CN

© Nokia 2014 RN3701 - RU5018/08/20154

RRC: Connection Setup

RRC Connection Access phase

RNC waits reply from UE

RRC: Connection Setup Complete

RRC setupsuccess rate



RRCRRCRRCRRC setup success rate (Example: RNC_20bsetup success rate (Example: RNC_20bsetup success rate (Example: RNC_20bsetup success rate (Example: RNC_20b

RR onnection set&" s&ccess ratio RR connection set&" !eans t$e reso&rce reser,ation "$ase)e%ore sending RR onnection et&" !essage to t$e U6

∑+

×

=]_____[]___([

])___([100tesuccess_raRRC_setup_

DIR AFT COMPSETUPCONN RRC ATT STPCONN RRC

COMPSTPCONN RRC

© Nokia 2014 RN3701 - RU5018/08/20155

− ])____[ DIRECTEDCOMPSETUPCONN RRC

∑∑

−+

×

=

])2601001[]2591001[]01001([

])11001([100tesuccess_raRRC_setup_

C M C M C M

C M



RRCRRCRRCRRC setup success rate (Examplesetup success rate (Examplesetup success rate (Examplesetup success rate (Example

© Nokia 2014 RN3701 - RU5018/08/2015



RRCRRCRRCRRC Setup and !ccess Complete Ratio N" (Example: RNC_#$eSetup and !ccess Complete Ratio N" (Example: RNC_#$eSetup and !ccess Complete Ratio N" (Example: RNC_#$eSetup and !ccess Complete Ratio N" (Example: RNC_#$e

RR et&" and Access o!"#ete Ratio 9: o,er t$e re"orting "eriod;

co,ers RR et&" and Access "$ases %ro! RR onnection Re<&est to RR onnection et&"

o!"#eteRR connection is needed a#so %or ot$er "&r"oses t$an a ca## =U .etac$ etc;

∑+

×

])____[

]___([100

DIRECTEDCOMPSETUPCONN RRC

COMP ACC CONN RRC

© Nokia 2014 RN3701 - RU5018/08/20157

∑−

+

])_____[

]_____[]___([____ _

CALL EMERG REJ STPCONN RRC

DIR AFT COMPSETUPCONN RRC ATT STPCONN RRC

∑

∑−+

+×

=

])6171001[]2591001[]01001([

])2601001[]81001([100o_NWplete_ratiaccess_comRRC_setup_

C M C M C M

C M C M

NW – Network perspektive



RN>154d RR onnection et&" and Access o!"#ete Ratio is a good sta)i#it' indicator;

• o,ers RR et&" and Access "$ases ?ro! RR onnection Re<&est to RR onnection et&" o!"#ete; Note1* RRconnection is needed a#so %or ot$er "&r"oses t$an a ca## =U .etac$ etc;;

• @o get t$e &ser "ers"ecti,e RR connection re"etitions and ce## rese#ections are ec#&ded in t$is KPI co!"ared to RN>4e($ic$ is %or net(ork "ers"ecti,e

RRC Connection Setup and !ccess CompleteRRC Connection Setup and !ccess CompleteRRC Connection Setup and !ccess CompleteRRC Connection Setup and !ccess Complete

EPEAT ETUP_ATT_R RRC_CONN_S NN_STP_ATT sum(RRC_CO

DIRECTED) ETUP_COMP_ RRC_CONN_S MPONN_ACC_CO(sum(RRC_C *100 RNC_154d

−

+=

© Nokia 2014 RN3701 - RU5018/08/20158

Performance can be poor due the:

• Registration atte!"ts in )ad co,erage areas; o!e U6 t'"es $a,e "oor "er%or!ance in (eak co,erageconditions;

• 2B/3B )order areas not eno&g$ $'steresis (it$ "ara!eter settings;

• Id#e !ode "ara!eteri+ation U6s ca!"ing in t$e (rong ce##• Poor#' "#anned RN )orders I&r ca&ses radio %ai#&re

RG_CALL)TP_REJ_EME RRC_CONN_S

__ __ ___ __ _

−

+−



Example: RRC %er&ormanceExample: RRC %er&ormanceExample: RRC %er&ormanceExample: RRC %er&ormance

© Nokia 2014 RN3701 - RU5018/08/2015




• KPI ea!"#es



18/08/201510 © Nokia 2014 RN3701 - RU50



R!' Success Ratio (rop call rateR!' Success Ratio (rop call rateR!' Success Ratio (rop call rateR!' Success Ratio (rop call rateCall rop Rate (CR ) *Call rop Rate (CR ) *Call rop Rate (CR ) *Call rop Rate (CR ) * ++++ CSRCSRCSRCSR ,-pes o& drops:,-pes o& drops:,-pes o& drops:,-pes o& drops:

Radio link dropSoft drop, RRC or RAB connection might still survive

UE BTS RNC CN

RRC drop

© Nokia 2014 RN3701 - RU5018/08/201511

Hard drop, all RAB drop as well

RAB drop

Hard drop, but RRC connection might still survive



R!' Success Ratio (rop call rateR!' Success Ratio (rop call rateR!' Success Ratio (rop call rateR!' Success Ratio (rop call rateCall drop rate (service level measurements M*00*Call drop rate (service level measurements M*00*Call drop rate (service level measurements M*00*Call drop rate (service level measurements M*00*

uresue_to_failreleases_deasesnormal_rel

uresue_to_failreleases_dCDR

+=

Dropped calls = calls which do not terminate due to one of the following reasons• Nor!a# re#ease• Re#ocation• Pree!"tion

© Nokia 2014 RN3701 - RU5018/08/201512

Possible causes for call drops are e.g.• =ack o% co,erage• Inter%erence• CD %ai#&re• issing neig$)or

• Re#ocation %ai#&re

Call drop rate for voice Call Drop Rate (CDR) = 1 – CSR = 1 – RNC_231d



RN>231d E RAF &ccess KPI %or Goice %ro! end &ser "ers"ecti,e

• RU20 ,ersion inc#&des ne( RN ICD BAN and trans!ission %ai#&re co&nters

R!' Success Ratio. /oice (CSRR!' Success Ratio. /oice (CSRR!' Success Ratio. /oice (CSRR!' Success Ratio. /oice (CSR

E_GANHO EL_CS_VOIC RAB_ACT_R E_ISHO EL_CS_VOIC RAB_ACT_R_HHO L_CS_VOICE RAB_ACT_RE

_P_EMP L_CS_VOICE RAB_ACT_RE _SRNC L_CS_VOICE RAB_ACT_RE VOICE T_COMP_CS_sum(RAB_AC

E_TRANS) IL_CS_VOIC RAB_ACT_FA E_UE IL_CS_VOIC RAB_ACT_FA E_RNC IL_CS_VOIC RAB_ACT_FA

E_IUR IL_CS_VOIC RAB_ACT_FA E_BTS IL_CS_VOIC RAB_ACT_FA E_RADIO IL_CS_VOIC RAB_ACT_FA

E_IU IL_CS_VOIC RAB_ACT_FAPVOICE_P_EM CT_REL_CS_*sum(RAB_A100100

d 231 RNC_

+++

++

+++

+++

+−

=

© Nokia 2014 RN3701 - RU5018/08/201513

o,ers RAF Acti,e P$ase o% a ca##; Pro)a)i#it' t$at ca## $as ended nor!a##' a%ter set&" $as

)een s&ccess%&#; @$is is taking into notice H&st ca##s ($ic$ $as ended t$is ce## )&t !ig$t$a,e )een started in ot$er ce##s;

E_TRANS) IL_CS_VOIC RAB_ACT_FA

E_UE IL_CS_VOIC RAB_ACT_FA E_RNC IL_CS_VOIC RAB_ACT_FA E_IUR IL_CS_VOIC RAB_ACT_FA

__ __ ___ __ ___ __ _

+

+++

+++



R!'R!'R!'R!' Success Ratio. /oice (CSR (reSuccess Ratio. /oice (CSR (reSuccess Ratio. /oice (CSR (reSuccess Ratio. /oice (CSR (re++++establisment includedestablisment includedestablisment includedestablisment included• RN>5434a - RAF &ccess Ratio %or AR Goice 9: inc#&ding RR a## re-esta)#is$!ent into t$e %or!&#a;

&ccess%&# re-esta)#is$!ents are considered in t$e sa!e (a' as a)nor!a# re#eases %ai#&res %ro! end &ser"oint o% ,ie(;

• @$is KPI is ca#c&#ated si!i#ar#' as RN>231d RAF &ccess Ratio Goice R additiona##' taking into acco&nt

RR2 2a## Re-esta)#is$!ents as 3%ai#&res3 %ro! end &ser "oint o% ,ie( ;@$is KPI is taking into notice H&st ca##s ($ic$ $a,e s&ccess%&##' reesta)#is$ed or $a,e ended in t$is ce## )&t !ig$t$a,e )een started in ot$er ce##s;

• Dne ne( co&nter added to %or!&#a co!"ared to RN>231d E 10018 RR>R6>6@>U>R@

© Nokia 2014 RN3701 - RU5018/08/201514

RT)SUCC EST RE RRC E_TRANS IL_CS_VOIC RAB_ACT_FA

E_UE IL_CS_VOIC RAB_ACT_FA E_RNC IL_CS_VOIC RAB_ACT_FA E_IUR IL_CS_VOIC RAB_ACT_FA

E_BTS IL_CS_VOIC RAB_ACT_FA E_RADIO IL_CS_VOIC RAB_ACT_FA E_IU IL_CS_VOIC RAB_ACT_FA

E_GANHO EL_CS_VOIC RAB_ACT_R E_ISHO EL_CS_VOIC RAB_ACT_R_HHO L_CS_VOICE RAB_ACT_RE

_P_EMP L_CS_VOICE RAB_ACT_RE _SRNC L_CS_VOICE RAB_ACT_RE VOICE T_COMP_CS_sum(RAB_AC

RT)SUCC EST RE RRC

E_TRANS IL_CS_VOIC RAB_ACT_FA E_UE IL_CS_VOIC RAB_ACT_FA E_RNC IL_CS_VOIC RAB_ACT_FA

E_IUR IL_CS_VOIC RAB_ACT_FA E_BTS IL_CS_VOIC RAB_ACT_FA E_RADIO IL_CS_VOIC RAB_ACT_FA

E_IU IL_CS_VOIC RAB_ACT_FAPVOICE_P_EM CT_REL_CS_*sum(RAB_A

a RNC_

____

____

100100

5434

++

+++

+++

+++

++

+

+++

+++

+−

=



Example: /oice CSSR and CSRExample: /oice CSSR and CSRExample: /oice CSSR and CSRExample: /oice CSSR and CSR

• RN>5434a is t$e ne( one (it$

re-esta)#is$!ent inc#&ded• RN>5434a s$o(s #o(er R

t$an RN>231d

© Nokia 2014 RN3701 - RU5018/08/201515



!MR Call Completion Success Rate!MR Call Completion Success Rate!MR Call Completion Success Rate!MR Call Completion Success Rate 1111 RNC_2*RNC_2*RNC_2*RNC_2*

tatistics %ro! di%%erent net(orks s$o(ing ,a#&e %or RN>231 E arc$ 2014

;50

100;00

100;50

AMR Call Completion Success Rate (RNC_231 (!

AR a## o!"#etion &ccess Rate RN>231 9

238networks

Median (""#$1

© Nokia 2014 RN3701 - RU5018/08/20151

5;00

5;50

;00

;50

7;00

7;50

8;008;50

;00

1 7 1 3

1 A

2 5

3 1

3 7

4 3

4 A

5 5

1

7

7 3

7 A

8 5

A 1

A 7

1 0 3

1 0 A

1 1 5

1 2 1

1 2 7

1 3 3

1 3 A

1 4 5

1 5 1

1 5 7

1 3

1 A

1 7 5

1 8 1

1 8 7

1 A 3

1 A A

2 0 5

2 1 1

2 1 7

2 2 3

2 2 A

2 3 5

2 4 1




• KPI ea!"#es



18/08/201517 © Nokia 2014 RN3701 - RU50



CS3%SCS3%SCS3%SCS3%S MultiR!'MultiR!'MultiR!'MultiR!'

• &#tiRAF ca## !eans t$at t$ere is and P ca##s at t$e sa!e ti!e %or t$e sa!e RRconnection;

• Usage o% e##>PC and URA>PC increased t$e rate o% &#ti RAF cases; @$&s !onitoring&#ti RAF et&" &ccess ratio )eco!es !ore essentia#;

• @$ere are not %ai#&re co&nters se"arate#' %or &#tiRAF sa!e %ai#&re co&nters s$o&#d )e

© Nokia 2014 RN3701 - RU5018/08/201518

;



4pdated4pdated4pdated4pdated MultiRabMultiRabMultiRabMultiRab 5%67s5%67s5%67s5%67s 1111 R40R40R40R40

RN>741)* AR P &#ti RAF et&" &ccess Ratio

• &#tiRAF set&" s&ccess rate co,ers RAF et&" and Access P$ases

• @$is KPI s$o( s&ccess ratio ($en N re<&est t$at a &#ti-RAF co!)ination in <&estion to )e set &"

)____(

)____(*100741_

PSNRT AMR ATT STP RABsum

PSNRT AMRCOMP ACC RABsumb RNC =

© Nokia 2014 RN3701 - RU5018/08/20151

>

• KPI descri)es retaina)i#it' o% !&#ti-RAF co!)ination AR P NR@ and co,ers RAF Acti,e "$aseo% ca##

)________(

)____(*100742_

PSNRT AMRFAIL ACT RABPSNRT AMRCOMP ACT RABsum

PSNRT AMRCOMP ACT RABsumb RNC

+

=



MultiR!'MultiR!'MultiR!'MultiR!' Si8nallin8Si8nallin8Si8nallin8Si8nallin8

UE RNC SGSNBTS

RRC Connection Establishment

RANAP: RAB Assignment request

MGW

AMR call Established

RRC: UL Direct Transfer (Activate PDP Context Request) RANAP: Direct Transfer (Activate PDP Context Request)

RRC: Radio Bearer etu!

RRC: Radio Bearer etu! Com!"eteRANAP: RAB Assignment Res!onse

RANAP: Direct Transfer (Activate PDP Context Acce!t)

#$%%$C&%% RAB'TP'ATT'A#R'PNRT : Te

numer of RAB setu! attem!s te resu"t of *ic

*ou"d e a mu"ti+RAB comination ,C A#R - P

NRT,.

Counter u!dated *enever CN requests tat te

#u"ti+RAB comination in question e set u!. Tis is

te case *en a P/C RAB a"read0 exists and a C/P

RAB is set u! in addition to it (for te same RRC

connection).

#$%%$C&%$ RAB'ACC'C1#P'A#R'PNRT : Te

numer of RAB access com!"eted for a mu"ti+RAB

comination ,C A#R -$P NRT,.

Counter is u!dated *en te RNC receives a setu!

com!"ete message from te U23 indicating tat te

#u"ti+RAB comination in question is successfu""0

esta"ised3 and sends a res!onse message to CN

indicating tat te RAB is successfu""0 esta"ised.

© Nokia 2014 RN3701 - RU5018/08/201520

NRT PS Call Established

AMR + NRT PS RAB active

RANAP: RAB Assignment request *it 42 RAB re"easeRRC: Radio Bearer Re"ease

RRC: Radio Bearer Re"ease Com!"eteRANAP: RAB Assignment Res!onse

Tis is te case *en a P/C RAB a"read0 exists

and a C/P RAB is set u! in addition to it (for te

same RRC connection).

#$%%$C&%5 RAB'ACT'C1#P'A#R'PNRT

Te numer of RAB active com!"etions and activere"eases for te mu"ti+RAB comination ,C A#R - $P NRT,. Counter u!dated *en RAB active iscom!"eted for te RAB t0!e in question.A"so RAB active re"eases due to RNC Re"ocation34nter+s0stem andover3 4nter+RNC ard andover and!re+em!tion u!date tis counter.

#$%%$C&%6 RAB'ACT'7A4L'A#R'PNRT

Te numer of RAB active fai"ures for mu"ti RABcomination ,C A#R - P NRT,. Counter u!dated*en one of te RAB in te mu"ti RAB comination inquestion fai"s in te active !ase of te ca"".



Example:Example:Example:Example: MultiRabMultiRabMultiRabMultiRab 5%67s5%67s5%67s5%67s

© Nokia 2014 RN3701 - RU5018/08/201521



S9O success rateS9O success rateS9O success rateS9O success rate

UE Node B RNC

RRC: Measurement Report (e1a / e1c)

NBAP: Radio Link Setup Request – for Soft Handover

NBAP: Radio Link Addition Request – for Soft Handover

NBAP: Radio Link Setu Res onse

%ecision tosetup ne& R'

Start )*R) SHO

© Nokia 2014 RN3701 - RU5018/08/201523

ALCAP : ERQ

RRC: Active Set Update Complete

RRC: Active Set Update

NBAP: Radio Link Addition Response

ALCAP : ECF

success

rate




J KPI c$ecks re#ia)i#it' o% CD on#'J Pro)#e!s #ike ce## o,er#a" or s"eci%ic adHacencies disc&ssed #ater

J Atte!"t and s&ccess co&nted in a## so&rce ce##s

_1ct_requestsreplacemensts_1bdrop_requeequests_1aaddition_r

t_updates_active_sesuccessfuls_rateSHO_succes

++=

© Nokia 2014 RN3701 - RU5018/08/201524

CELL A

CELL B

CELL C




FOR_NRT) EQ_ON_SHO_CELL_DEL_R_FOR_NRT REQ_ON_SHOCELL_REPL_

FOR_NRT EQ_ON_SHO_CELL_ADD_RFOR_RT EQ_ON_SHO_CELL_DEL_R

_FOR_RT REQ_ON_SHOCELL_REPL_SHO_FOR_RT DD_REQ_ON_sum(CELL_A

FOR_NRT) ES_ON_SHO_SUCC_UPDAT SHO_FOR_RT PDATES_ON_sum(SUCC_U *100ate% HOsuccessr RNC_195a_S

++

++

+

+=

RNC_153b SHO SR, RT

RNC_192b SHO SR, NRT

UE Node B RNC

© Nokia 2014 RN3701 - RU5018/08/201525

Number of successful ASupdate for the cell underobservation

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REQ_ON_SHOCELL_REPL_

EQ_ON_SHOCELL_DEL_R

EQ_ON_SHOCELL_ADD_R

ES_ON_SHOSUCC_UPDAT

+

+

Total number of not periodicalmeasurement report (1A, 1B, 1C)received by the cell underobservation

UPDATED FOR ALL THE CELLS WITHIN as

WHEN MEAS. REPORT IS RECEIVED

RRC: Measurement Report (e1a / e1c)

NBAP: Radio Link Setup Request – for Soft Handover

ALCAP : ERQ

RRC: Active Set Update Complete

RRC: Active Set Update

NBAP: Radio Link Addition Request – for Soft Handover

NBAP: Radio Link Setup Response

NBAP: Radio Link Addition Response

ALCAP : ECF

%ecision tosetup ne& R'

Start )*R)



Example: S9O attempts and success &or R, NR,Example: S9O attempts and success &or R, NR,Example: S9O attempts and success &or R, NR,Example: S9O attempts and success &or R, NR,

© Nokia 2014 RN3701 - RU5018/08/20152



ContentContentContentContent• KPI ea!"#es

- Accessi)i#it'- Retaina)i#it' .ro" Rate- Usage- o)i#it'- &a#it' @$ro&g$"&t 6%%icienc'

18/08/201527 © Nokia 2014 RN3701 - RU50



,rou8put measurement overvie;,rou8put measurement overvie;,rou8put measurement overvie;,rou8put measurement overvie;cell trou8putcell trou8putcell trou8putcell trou8put

HSPA throughput sent / received by RNC on DL / UL per cell

ce## t$ro&g$"&t !eas&re!ents 1023 e;g; RN>08c RN>73d

Idea*

60ATIONPERIOD_DUR1000

8TA_VOLHS_DSCH_DA RNCatThroughputAveraged-MACHSDPA

⋅⋅

⋅

=∑

© Nokia 2014 RN3701 - RU5018/08/201528

@rans!ission o% A-d / A-es P.Us o,er C-.C / 6-.C

o&nter gi,e data ,o#&!e in )'te

KPI gi,e t$ro&g$"&t in K)it/s

60ATIONPERIOD_DUR10008TA_VOLSDPA_UL_DANRT_EDCH_H RNCatThroughputAveragees-MACHSUPA

⋅⋅

⋅= ∑

rn3701 rn3701 3g ran nsn optimization fundamentals

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