ZTE-LTE-FDD-Key-Performance-Indicators-Description-Guide-pdf.pdf

FDD LTE Key Performance Indicator  s Description Guide

Learning Objectives  After aving !earned tis tis training course" you sou!d sou!d be ab!e to understand# 

$asic %no&!edge of FDD LTE KPIs



'ategories of FDD LTE KPIs



Formu!as of FDD LTE KPIs

'ontents    

Basic Knowledge of FDD LTE KPIs FDD LTE e(ode$ KPIs FDD LTE (et&or% KPIs Oter FDD LTE KPIs

)eferences 

 Counters, Definitions, and Numbering Conventions

For more information" refer to te NetNumen M31(LTE) NE Management System eNod  eB Performance Counter Reference at te fo!!o&ing *)L: *)L : ttp#++tsm,-te,com,cn+tsm+Fi!e'enter+Fi!e,asp./0ode1read2Fi!eID134356785



Formulas

For more information" refer to te NetNumen M31(LTE) NE Management System eNod  eB Key Performance nd!cator Reference  at te fo!!o&ing *)L# ttp#++tsm,-te,com,cn+tsm+Fi!e'enter+Fi!e,asp./0ode1read2Fi!eID134356789

'ounter E.amp!e

Counter 

E'am$le

easurement !b"ect

easurement Number 

easurement T#$e

Counter Name

Counter %e&uence Number 

'e!! Type

383:4

;tatistics of ))' 'onnection Estab!isment

(umber of ;uccessfu! mt<  Access ))' 'onnection Estab!isment

'383:44444

'ounter ;tructure easurement !b"ect

easurement T#$e

ID# 8=4<8>> • • • •

'e!! Type e(ode$ Type e(ode$ IP Lin% Type 'e!! Pair Type

Counter 

ID# 3833:4<3833>> •

• • • •

;tatistics of ))' connection estab!isment ;tatistics of E<)A$ ;tatistics of time Type of a ce!! pair  Oter 

ID# ' ? 0easurement Type (umber ? @@@

KPI(PI KPI ID# 364744<3648>> •

•

(umber of successfu! mt<  Access ))' connection estab!isment • (umber of unsuccessfu! mt<  Access ))' connection estab!isment timer timeoutB • Oter 

•

))' connection estab!isment success rate Oter 

PI ID# 364744<3648>> • •

Paging congestion rate Oter 

)eporting Procedure

Tis reporting procedure is described as fo!!o&s# ;tep 6 Te )(L' subsystem reports data to te OA0 using te event
KPI Overvie& Descri$tion  0obi!e subscriber ;erviceabi!ity ? )e!iabi!ityB# An FDD LTE can provide a mobi!e subscriber &it ig
'ontents    

$asic Kno&!edge of FDD LTE KPIs FDD LTE eNodeB KPIs FDD LTE (et&or% KPIs Oter FDD LTE KPIs

FDD LTE e(ode$ KPIs 



Latenc# 

'


*
T)roug)$ut *ono+E  



Pea% *E Data )ate  Average *E Data )ate 'e!! Edge *E Data )ate

Cell Ca$acit# *ulti+E  

Pea% 'e!! Trougput  Average 'e!! Trougput 'e!!
*
.ound Tri$ Time 'ombined EP'  App!ication ;erver  e(ode$ *E

 p i n g

easured .ound Tri$ Time

 De$endenc# 

)adio freCuency# *nder ce!!" mid


(eigbor ce!! !oading# *n!oaded and !oaded



;cedu!ing a!goritm# Pre


Ping si-e# 3: $" 6444 $" and 6744 $

'
%tate Transition Time

 %ignaling

Procedure

Trougput 0ono<*EB 

Pea/ E Data .ate

 Transmission

 Terminal

BS

E.g. Gateways, Routers, irewalls

Application Server at NGMN network edge

DownlinkorUplinkDataStream 



0ssum$tion 

Loading# ;ing!e ce!!" un!oaded



*E speed# ;tationary mode



Location# *nder ce!! good )F conditionsB



0I0O configuration# DL :: 0I0O" *L 6: ;I0O

De$endenc# 

Operating band&idt



*E category



*E *L+DL )$ !imitation

Trougput 0ono<*EB 

0verage E Data .ate



0ssum$tion





0I0O configuration# DL :: 0I0O" *L 6: ;I0O



Loading# 6 *E in te serving ce!!" neigbor ce!! !oaded



*E speed# ;tationary mode



Location# *niform!y
De$endenc# 

Operating band&idt



*E category



*E *L+DL )$ !imitation



*E distribution in eac signa! range

Trougput 0ono<*EB 

Cell+Edge E Data .ate



0ssum$tion





0I0O configuration# DL :: 0I0O" *L 6: ;I0O



Loading# 6 *E in te serving ce!!" neigbor ce!! !oaded



*E speed# ;tationary mode



Location# 'e!! edge

De$endenc# 

Operating band&idt



*E category



*E *L+DL )$ !imitation



*E ;I() at te ce!! edge

Trougput 0u!ti<*EB 

Pea/ Cell T)roug)$ut



0ssum$tion





0I0O configuration# DL :: 0I0O" *L 6: ;I0O



Loading# 0u!tip!e ce!!s" !oaded 84B



*E ;peed# ;tationary mode



Location# Good )F conditions

De$endenc# 

*E category# T$; !imitation" 95A0 in *L



*E *L+DL )$ !imitation



Environment# Dense urban" urban" suburban" and rura!



;cedu!ing a!goritm

Trougput 0u!ti<*EB 

0verage Cell T)roug)$ut T#$ical E Distribution odel





0ssum$tion 

0I0O configuration# DL :: 0I0O" *L 6: ;I0O



Loading# 0u!tip!e ce!!s" !oaded



*E speed# ;tationary 0ode



Location# *niform!y
De$endenc# 

*E category T$; !imitation" 95A0 in *LB



*E *L+DL )$ !imitation



*E distribution in eac signa! range" scedu!ing a!goritm

Trougput 0u!ti<*EB 

Cell+Edge E T)roug)$ut



0ssum$tion





0I0O configuration# DL :: 0I0O" *L 6: ;I0O



Loading# 0u!tip!e ce!!s" !oaded 84B



*E speed# ;tationary mode



Location# 'e!! edge

De$endenc# 

*E category T$; !imitation" 95A0 in *LB



*E *L+DL )$ !imitation



Environment# Dense urban" urban" suburban" and rura!



;cedu!ing a!goritm



*E ;I() at te ce!! edge

'ontents    

$asic Kno&!edge of FDD LTE KPIs FDD LTE e(ode$ KPIs FDD LTE Networ/ KPIs Oter FDD LTE KPIs

FDD LTE (et&or% KPIs 

0ccessibilit#  ))' Estab!isment ;uccess )ate  E<)A$ ;etup ;uccess )ate



.etainabilit#  E<)A$ Drop )ate



obilit#  andover ;uccess )ate



0vailabilit#  'e!! Avai!abi!ity



Integrit#  Pac%et Loss )ate  DL PD'P ;D* Latency

 Accessibi!ity Teoretica! !imit# 644 Idea! va!ue in a commercia! net&or%# H >=

 Accessibi!ity   'ategoryB

Initia! E<)A$  Accessibi!ity

KPI

))' 'onnection ;etup ;uccess )ate

;6<;IG Estab!is ;uccess )ate

Initia! E<)A$ ;etup ;uccess )ate

 Added E<)A$  Accessibi!ity

 Attac ;uccess )ate

Detac ;uccess )ate

))' )e
Paging ;uccess )ate

 Air Interface

))' 'onnection ;etup ;uccess )ate

;6<;IG Estab!is ;uccess )ate

KPI

*E 'onte.t ;etup ;uccess )ate

 Added E<)A$ ;etup ;uccess )ate

E<)A$ ;etup ;uccess )ate

E<)A$ $!oc% )ate  per 'IB

、 'a!! ;etup ;uccess )ate" 'a!! $arring )ate

'ontention<$ased P)A' Performance

'ontention
))' Estab!isment ;uccess )ate 

Descri$tion

Tis KPI so&s te probabi!ity for a subscriber to be provided &it an ))' connection upon reCuest,



%ignaling Procedure UE

EUTRAN

 RRCConnectionRequest

:

 RRCConnectionSetup

 RRCConnectionSetupComplete



6

3

Formula

))' Estab!isment ;uccess )ate 1 (umber of successfu! ))' connection estab!isment + (umber of successfu! ))' connection estab!isment ? (umber of fai!ed ))' connection estab!ismentB  644

E<)A$ ;etup ;uccess )ate 

Descri$tion

Tis KPI so&s te probabi!ity for a subscriber to be provided &it an E<)A$ reCuest inc!uding initia! and added conte.t setup procedures,



%ignaling Procedure e($

I(ITIAL 'O(TE@T ;ET*P )EF*E;T

I(ITIAL 'O(TE@T ;ET*P )E;PO(;E



e($

00E

6

E<)A$ ;ET*P )EF*E;T

E<)A$ ;ET*P )E;PO(;E

:

00E

3 5

Formula

E<)A$ ;etup ;uccess )ate 1 (umber of successfu! initia! E<)A$ ? (umber of successfu! added E<)A$ estab!ismentB + (umber of successfu! initia! E<)A$ estab!isment ? (umber of fai!ed initia! E<)  A$ estab!isment ? (umber of successfu! added E<)A$ estab!isment ? (umber of fai!ed added E<)A$ estab!ismentB  644

)etainabi!ity Teoretica! !imit# 4 Idea! va!ue in a commercia! net&or%#  :

)etainabi!ity  'ategoryB

KPI *E E<)A$ )etainabi!ity Per 'I

*E E<)A$ )etainabi!ity

))' Drop )ate

E<)A$ Drop )ate Per 'IB

o& Often

E<)A$ Duration Time per 'I Drop

Percentage

E<)A$ *L Data Jo!ume Per 'I Drop o; $efore Drop

E<)A$ DL Data Jo!ume Per 'I Drop

 Active E<)A$ Drop )ate

E<)A$ Drop )ate 

Descri$tion

Tis KPI so&s te probabi!ity for an a subscriber to !oss te E<)A$" suc as an event b eing re!eased by te e(ode$ due to over!oad contro!, 

%ignaling Procedure E+.0B .eleased b# t)e eNodeB-e($

6



00E

E<)A$ )ELEA;E I(DI'ATIO(

Formula

E<)A$ Drop )ate 1 (umber of Abnorma!!y )e!eased E<)A$ + (umber of ;uccessfu!!y Estab!ised E<)A$  644

0obi!ity 

%uccessful 1andover Categories

Intra
Intra
Inter
Inter
LTE to *0T;

*0T; to LTE

LTE to G;0

Inter<)AT O ;uccess )ate @: $ased O

'ontention $ased O

;6 $ased O

 A!! Incoming O Per 'e!!

 A!! Outgoing O Per 'e!!

 A!! Incoming O Per 'e!! Pair 

 A!! Outgoing O Per 'e!! Pair 

'ontention Free O

Intra<)AT O ;uccess )ate

Troub!esooting

G;0 to LTE

0obi!ity 

1andover  





1andover Pre$aration %uccess .ate 

Teoretica! !imit# 644



Idea! va!ue in a commercia! net&or%  、 >>



;tep 5  ;tep 9B

1andover E'ecution %uccess .ate 

Teoretica! !imit# 644



Idea! va!ue in a commercia! net&or%# >=



O In# ;tep 9  ;tep 66



O Out# ;tep 8  ;tep 68

obilit# %uccess .ate 

Teoretica! !imit# 644



Idea! va!ue in a commercia! net&or%# >8

 MobilitySR=  HO. Pr eparationS   R × HO. ExecutionS   R

andover Preparation and E.ecution Handover

Start Point

Outgoing handover  preparation

The source eNodeB decides to perform a handover.

Stop Point

The source eNodeB sends the RRC Connection Reconfiguration message to the UE.

Outgoing handover execution

The source eNodeB sends the RRC Connection Reconfiguration message to the UE.

The source eNodeB receives the UE Context Release message from the destination eNodeB.

ncoming handover  preparation

The destination eNodeB receives the !andover Re"uest message from the source eNodeB.

The destination eNodeB returns the !andover Response message to the source eNodeB.

ncoming handover execution

The destination eNodeB receives the RRC Connection Reconfiguration Complete message from the UE.

The destination eNodeB sends the UE Context Release message to the source eNodeB.

'e!! andover and 'e!! Pair andover  

Te outgoing andover preparation success rate for eac andover pair measures te ando ver preparation from te serving ce!! to a certain neigbor ce!!, ere are t&o typica! e.amp!es# 

In te event of te andover from ce!! A to ce!! $" te Intra+eNodeB Intra+fre& !utgoing 1andover Pre$aration %uccess .ate $er Cell $air is measured in ce!! A,



In te event of te andover from ce!! $ to ce!! A" te Intra+eNodeB Intra+fre& !utgoing 1andover Pre$aration %uccess .ate $er Cell $air is measured in ce!! $,



Te outgoing andover success rate contains a!! outgoing andover preparation successes fr  om te serving ce!! to a!! neigbor ce!!s,



Te measurement of tese t&o KPIs can faci!itate us in sifting t&o ce!!s tat s uffer most ando ver preparation fai!ures" performing neigbor ce!! optimi-ation" and even de!eting unusab!e nei gbor ce!!s,

Intra
Descri$tion

Te intra


Formulas 

Intra


Inter
Intra
Note2 

If te e(ode$ receives te ))' 'onnection )econfiguration 'omp!ete message in step 5" it i ndicates tat te andover is successfu!,



If te e(ode$ receives te ))' 'onnection )eestab!isment )eCuest message in step 9" it i ndicates tat te andover is unsuccessfu!,

Inter
Descri$tion Te inter
Formulas 

Outgoing intra


Incoming intra


 Outgoing inter


Incoming inter
Inter
Inter
Descri$tion en te e(ode$ decides to perform a andover according to te *E measurement report and me an&i!e te destination ce!! is not connected to te e(ode$ troug te @: interface" te inter


Formulas 

Outgoing intra


Incoming intra


 Outgoing inter


Incoming inter
Inter
Inter<;ystem andover ;uccess )ate Te inter
 Avai!abi!ity 

0vailabilit#

Im$ortant and Demanding



Cell availabilit#



Teoretica! !imit# 644



Idea! va!ue in a commercia! net&or%# H >>,>>7

measurement%period) ∑ RRU.CellUnavaila(leTime.'cause& CellAvailability =

cause

measurement  %  period 



De$endenc#



;oft&are ? ard&are



*navai!ab!e Time 1 *np!anned do&ntime on!y e.c!uding p!anned do&ntimeB



P)#sical meaning 397  :5  94  6<>>,>>7B 1 :9,:= min ce!! out
×

#$$

'e!! Avai!abi!ity 

Descri$tion Te ce!! avai!abi!ity measures te ratio of in


%ignaling Procedure



Formulas 'e!! Avai!abi!ity 1 In<;ervice Time + 0easurement Granu!arity Time 'e!! Avai!abi!ity 1 '383:34844 + 0easurement Granu!arity Time  644

Integrity 

*L+DL Pac%et Loss )ate



DL PD'P ;D* Latency

3CI

.esour   Priorit# ce T#$e

Pac/et Latenc# Budget *N!TE 4-

Pac/et Error Loss .ate *N!TE 5-

:

644 ms

64<:

'onversationa! Joice

5

674 ms

64<3

'onversationa! Jideo Live ;treamingB

3 (OTE 3B

3

74 ms

64<3

)ea! Time Gaming

5 (OTE 3B

7

344 ms

64<9

(on<'onversationa! Jideo $uffered ;treamingB

7 (OTE 3B

6

644 ms

64<9

I0; ;igna!!ing

9

344 ms

64<9

Jideo $uffered ;treamingB T'P
8

644 ms

64<3

Joice" Jideo Live ;treamingB Interactive Gaming

344 ms

64<9

6 (OTE 3B : (OTE 3B

G$)

9 (OTE 5B

8 (OTE 3B

= (OTE 7B

> (OTE 9B

(on< G$)

=

>

E'am$le %ervices

Jideo $uffered ;treamingB T'P
Do&n!in% PD'P ;D* Latency 

Descri$tion Tis KPI indicates average do&n!in% PD'P ;D* !atency based on te 'I type" from te time &en a PD'P ;D* reaces te e(ode$" to te time &en te *E receives tis PD'P ;D*" t at is to say" a!! fragments of tis PD'P ;D* receives a successfu! A) response,





%ignaling Procedure

Formula Average Do&n!in% PD'P ;D* Latency 1 Tota! Latency of A!! PD'P ;D*s + (umber of A!! PD'P ;D*s

Do&n!in% IP Pac%et Latency 

Descri$tion Tis KPI indicates average do&n!in% IP pac%et !atency" from te time &en te e(ode$ receives te IP pac%et troug te ;6 or @: interface" to te time &en te first fragment of tis IP pac%et is transmitted by te e(ode$ troug te air interface, It measures te time i nterva! at &ic te service is processed by te e(ode$" &ic forms a strong foundation for net&or% optimi-ation,





%ignaling Procedure

Formula  Average Do&n!in% IP Pac%et Latency 'I 6  >B 1 Tota! Do&n!in% IP Pac%et Latency 'I 6  > B + ( umber of A!! PD'P ;D*s Do&n!in% 'I 6  >B

*p!in%+Do&n!in% Pac%et Loss )ate 

Descri$tion Tis KPI measures te ratio of discarded PD'P ;D*s to received PD'P ;D*s  due to te timeout of te TimeDis'ard timer" &en no" partia!" or a!! fragments are transmitted troug te e(ode$ or air interface, It sou!d be noted tat PD'P ;D*s vary from 'I to 'I 6  >B" from up!in% to do&n!in%,



Counters Number of 0ll PDCP %Ds *p!in%# en te PD'P !ayer of te e(ode$ receives te PD'P ;D* from te *E" tis counter is incremented by 6, Do&n!in%# en te PD'P !ayer of te e(ode$ sends te PD'P ;D* to te )L' !ayer" tis counter is incremented by 6, Number of Discarded PDCP %Ds *p!in%# en te PD'P !ayer of te e(ode$ receives te PD'P ;D* from te *E" te ;( is not consecutive, Do&n!in%# en te PD'P !ayer of te e(ode$ sends te PD'P ;D* to te )L' !ayer" te ;( is not consecutive,



Formula Air Interface or e(ode$ Pac%et Loss )ate 1 (umber of Discarded Pac%ets over te Air Interface or e(ode$ + (umber of A!! Pac%ets over te Air Interface or e(ode$

'ontents    

$asic Kno&!edge of FDD LTE KPIs FDD LTE e(ode$ KPIs FDD LTE (et&or% KPIs !t)er FDD LTE KPIs

Traffic Type < (umber of ))' 'onnections 

Descri$tion Tis KPI counts te number of ))' connections" &ic is used to measure te *E access to te system for ca!! o!d, It invo!ves te fo!!o&ing t&o counters#  





 Average number of ))' connections 0a.imum number of ))' connections,

%ignaling Procedure 

en te e(ode$ receives te ))' Estab!isment 'omp!ete message" te number of ))' connections is in cremented by 6,



en te e(ode$ triggers te ))' estab!isment successfu!!y due to te andover" te number of ))' con nections is incremented by 6,



en te e(ode$ re!eases te ))' connection" te number of ))' connections is decremented by 6,



en te e(ode$ reestab!ises te ))' connection in anoter ce!!" te number of ))' connections is decre mented by 6,



en te e(ode$ reestab!ises te ))' connection bac% to te serving ce!!" te number of ))' connection s is incremented by 6,

Formulas  

0a.imum (umber of ))' 'onnections ;amp!ing 'ounterB  Average (umber of ))' 'onnections ;amp!ing 'ounterB

Traffic Type  Average (umber of 'I<$ased *Es 

Descri$tion Tis KPI measures te average number of E<)A$ connections" &ic eva!uates net&or% traffic, It s ou!d be noted tat tis KPI varies from 'I to 'I,



%ignaling Procedure *%am$ling Counter 



Initia! E<)A$ estab!isment success  Added E<)A$ estab!isment success



Incoming E<)A$ andover success



Incoming E<)A$ modification success canging te ne& 'I to te o!d 'IB



Outgoing E<)A$ andover success



Outgoing E<)A$ modification success canging te o!d 'I to te ne& 'IB



E<)A$ re!ease

Formula

Tis KPI is counted by averaging te measured va!ues of a!! samp!ing points &itin a specific meas urement cyc!e,

Traffic Type  (umber of Activated 'I<$ased *Es 

Descri$tion Tis KPI counts te number of *Es in te cace during a specified time period, It can be m easured based on a specific 'I" up!in% or do&n!in%" average number or ma.imum number  ,

Tis KPI indicates te number of in


%ignaling Procedure (+A



Formula

Tis KPI is counted &en any data is present in te E<)A$ cace of 'I i every samp!ing cyc!e 644 msB" as defined in te 3GPP T;,

)esource A!!ocation 'e!! 2 ;ystem 'ate gor yB )esources

*L < ' P)$ *sage

DL <' P)$ *sage

Tota! *L P)$ *sage

PD'' *sage

*L < * P)$ *sage

P)A' *sage

*L P)$ *sage per 'I

Paging 'ongestion )ate

Tota! DL P)$ *sage

 Avg 'P* Load

DL <* P)$ *sage

 Avg DL Transmission Po&er 

DL P)$ *sage per 'I

 Avg *L Interference Per P)$

P)A' Propagation De!ay

Avg D;P Load

P)A' 0essage Load