UMTS Performance Trouble Shooting and Optimization Guidelines NSN Throughput

8/12/2019 UMTS Performance Trouble Shooting and Optimization Guidelines NSN Throughput

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UMTS RAN Performance TroubleShooting Guideline NSN DateThroughputWest Region Performance Engineering

Document Initiated November 24, 2008Revision Number 1.0Revision Date February 2, 2009

Co yri!"t 2008 #$%obi&e '(), Inc. )&& ri!"ts reserved.Con*identia& and ro rietary in*ormation o* #$%obi&e '(), Inc. Not *or distribution outside #$%obi&e.


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'%#( Data #"rou!" ut #roub&e ("ootin! and + timi ation -uide&ine

Document Information#"e in*ormation in t"ese materia&s is con*identia& and ro rietary to #$%obi&e '(), Inc. #"ese materia&s are aut"ori ed *or t"e use o* #$%obi&e '() service roviders and t"eir em &oyees and a!ents, so&e&y *or t"e ur oses o* t"e a!reement under "ic" t"ese materia&s are

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Acknowledgements

#"e *o&&o in! individua&s are res onsib&e *or contribution to t"e s eci*ications, desi!n andim &ementations re resented in t"e various revisions7

evan (mit"

ivencio :una

Ray Robertson

%artin :ut"era u&

Protection of Information Credibility

#"is document contains con*identia& materia& critica& to t"e business and is t"ere*ore a contro&&eddocument. +utdated co ies must be destroyed to revent erroneous use o* obso&ete in*ormation andcom romised security o* con*identia& materia&. Do not e$mai& t"is *i&e. Do send t"e &in to corres ondentsso t"ey are assured o* seein! t"e &atest revision. #"e most recent revision o* t"is *i&e is a& ays in so*tco yand can be accessed at t"e *o&&o in! &in .

Note to revisers7 For t"e above &in to remain va&id, you must use ro er c"ec out ; c"ec in rocedures

"en you u date t"is document.Revision Code

#"e revision number i&& re*&ect t"e modi*ications by *o&&o in! t"e *ormat Rev. /, y, "ere

X is t"e *irst di!it, incremented *or c"an!es o* substance, i.e. tec"nica&; rocedura& issues.

Y is t"e second di!it, incremented "en editoria& on&y c"an!es "ave been incor orated.

)&& dra*t; re&iminary versions are 0.n< t"e *irst *ina& version is Revision 1.0.

Revision istor!Rev. Date Author "nformation1.0 11/24/2008 Bevan Smith Initial Template for NSN UMTS Phase 1 Tro !le Shootin"

# i$eline $o% ment for &PI %ate"or' ()ata Thro "hp t*.

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Table of #ontents

UM ! RA" Performance rouble !#ooting $uideline % "!" Date #roug#&ut''''''''''''''''''''''''''''''''''''''' ((' Introduction'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' )

1.1. >ur ose ? (co e.................................................................................................................................... =1.2. De*initions *or t"is Document..................................................................................................................@

*' +verview''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' ,-' Monitoring Data #roug#&ut''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' (-

A.1. #"rou!" ut B>I( ; C+'N# R(........................................................................................................... 14A.1.1. >( R99 D: 'ser Data #"rou!" ut b s5...........................................................................................14A.1.2. >( D: /// R) #"rou!" ut b s5.....................................................................................................1=A.1.A. >( R99 ': 'ser Data #"rou!" ut b s5...........................................................................................1=A.1.4. >( ': /// R) #"rou!" ut b s5.....................................................................................................1@A.1.=. (D>) 'ser Data #"rou!" ut b s5........................................................................................ ........ [email protected]. #ra**ic o&ume B>Is ; C+'N# R(....................................................................................................... 1EA.2.1. (D>) #ra**ic o&ume % 5............................................................................................................... 1EA.2.2. >( D: ac !round o&ume % 5........................................................................................................ 18A.2.A. >( D: ///B #ra**ic o&ume % 5........................................................................................................ 18A.2.4. >( ': ac !round o&ume % 5........................................................................................................ 19

A.2.=. >( ': ///B #ra**ic o&ume % 5........................................................................................................ 19A.A. (ession B>Is ; C+'N# R(................................................................................................................. 19A.A.1. (D>) (essions................................................................................................................................ 20A.A.2. >( (essions ac !round or Interactive5............................................................................................21A.4. )vera!e o&d #ime B>Is ; C+'N# R(................................................................................................21A.4.1. %ean "o&d time R) *or >( NR# ca&&..................................................................................................21A.4.2. %ean "o&d time R) *or >( NR# ca&&..................................................................................................22A.=. Identi*ication and a&idation o* Data #"rou!" ut Issues.......................................................................2A

.' roubles#ooting Data #roug#&ut''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' */)' rans&ort 0 Iub'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' *1

=.1. B>Is ; Counters.....................................................................................................................................29=.1.1. rrored (econds................................................................................................................................. 29=.1.2. (evere&y rrored (econds.................................................................................................................. 29=.1.A. Iub Ca acity (D>)...........................................................................................................................A0=.1.4. )):2 >at" )vera!e Reserved and idt" 5....................................................................................A0=.1.=. )):2 >at" %a/imum Reserved Ce&& Rate ce&&s;s5......................................................................... ...A1=.1.@. ': CC 'ti&i ation 5........................................................................................................................ A1=.1.E. D: CC 'ti&i ation 5........................................................................................................................ A2=.2. #roub&es"ootin! ; + timi ation............................................................................................................. AA

/' "ode 2 3ardware''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' -)@.1. B>I( ; C+'N# R(.......................................................................................................................... .... [email protected]. )v! Nbr )vai&ab&e C ..........................................................................................................................A=@.1.2. %in Nbr )vai&ab&e C .......................................................................................................................... A@@.1.A. %a/ Nbr 'sed C D:..........................................................................................................................A@@.1.4. )ve Nbr 'sed C D:.......................................................................................................................... A@ B>I descri tion7 )vera!e number o* used C"anne& &ements in Do n&in direction..................................A@@.1.=. %a/ Nbr 'sed C ':..........................................................................................................................A@@.1.@. )ve Nbr 'sed C ':.......................................................................................................................... AE B>I descri tion7 )vera!e number o* used C"anne& &ements in ' &in [email protected]. #R+' : ( ++#IN- ; +>#I%IG)#I+N............................................................................................. A8

4' Air Interface'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' .5E.1. B>I( ; C+'N# R(.......................................................................................................................... .... 40E.1.1. (D>)................................................................................................................................................40E.1.1.1. )ir Inter*ace ($D(C %)C$d t"rou!" ut b s5.................................................................... .......40E.1.1.2. CHI Distribution................................................................................................................................ 41E.1.1.A. 'ser Distribution...............................................................................................................................41

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E.1.1.4. )dditiona& Counters.......................................................................................................................... 42E.1.2. R99 NR#............................................................................................................................................. 42E.1.2.1. C"anne& ( itc"in!........................................................................................................................... 42E.1.2.2. earer )&&ocations............................................................................................................................ 42E.1.2.A. %a/imum Code 'sa!e 5.............................................................................................................. 4AE.2. #R+' : ( ++#IN- ; +>#I%IG)#I+N............................................................................................. 44

1' R"C''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' '''''''' .48.1. B>Is ; Counters.....................................................................................................................................4E8.1.1. 'nit :oad.............................................................................................................................................4E8.1.2. RNC Re&ated Fai&ure Counters............................................................................................................ 4E8.1.A. Iu >( ' &in #ra**ic ...................................................................................................................... ...... 488.1.4. Iu >( Do n&in #ra**ic ........................................................................................................................ 488.2. #R+' : ( ++#IN- ; +>#I%IG)#I+N............................................................................................. 49

APP6"DIX A'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' )5



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$% "ntroduction

1.1. Purpose & Scope#"e intent o* t"is document is to rovide a !uide *or '%#( data t"rou!" ut troub&e s"ootin!and o timi ation usin! B>I s and counters avai&ab&e *or t"e N(N Radio )ccess Net or .#"is inc&udes detai&in! avai&ab&e counters and B>I s and "o to inter ret trends observed,

rovidin! ana&ysis strate!ies and o**erin! !uide&ines *or im rovin! R)N t"rou!" uter*ormance and recommended so&utions. #"is concerns on&y a sma&& ortion o* t"e end to

end service. #"e *i!ure be&o i&&ustrates t"e '%#( Ho( )rc"itecture and service detai&.

)s t"e sco e o* t"is document is restricted to t"e Radio earer )ccess (ervice. #"ema ority o* monitorin! and o ortunity *or im rovement by t"e o timi ation en!ineer resides

it"in t"e Radio earer ortion o* t"e R) service.

#"e R) service rovides t"e con*identia& trans ort o* user data bet een t"e ' and CNit" a Ho( t"at is ade3uate *or t"e ne!otiated '%#( bearer. #"e R) service consists o* a

radio bearer R 5 service and an Iu bearer service. #"e R service is rea&i ed in t"e radio&in contro& R:C5 &ayer bet een t"e (RNC and t"e ' , usin! '#R) FDD, "i&e t"e Iubearer service rovides trans ort bet een t"e '#R)N and CN.

)&& ot"er services inc&udin! # ; %# :oca& earer (ervice, CN earer (ervice and t"e/terna& earer (ervice are out o* sco e o* t"is document.

#"e B>I;Counters described "ere are a &icab&e to R)(0@ *or N(N '#R)N.

#"is document is not a&& inc&usive and is on&y intended to rovide an understandin! o* t"eavai&ab&e N(N B>I s;Counters *or troub&e s"ootin! and o timi ation best ractices. For anyin*ormation not covered "ere, t"e R)(@.0 system &ibrary s"ou&d be re*erred to.

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1.2. Definitions for this Document

Term or Acron!m Definition

+#PP Thir$ #eneration Partnership Pro,e%t

-S -%tive Set

BSI Base Station I$entit' o$e

BTS Base Trans%eiver Station

N ore Net or

PI ommon Pilot hannel

) )e$i%ate$ hannel

) )o n in

)P )e$i%ate$ Ph'si%al ontrol hannel

)P )e$i%ate$ Ph'si%al hannel

)RN )rift Ra$io Net or ontroller

3- 3or ar$ -%%ess hannel

3I3 3irst In 3irst t

#5R-N #SM 5)#5 R-N

#SM #lo!al S'stem for Mo!ile omm ni%ations

S ierar%hi%al ell Str %t re

S)P- i"h Spee$ )ata Pa% et -%%ess

I-3 Intra 3re6 en%'

I5 Information 5lement

I53 Inter 3re6 en%'

I3 Inter 3re6 en%' an$ ver

Inter7R-T Inter Ra$io -%%ess Te%hnolo"'

IR-T Inter Ra$io -%%ess Te%hnolo"'

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I r Interfa%e !et een t o RN s

&PI &e' Parameter In$i%ator

- o%ation -rea

-I o%ation -rea In$i%ator

NB-P No$e B -ppli%ation Part

No$e B

o"i%al no$e responsi!le for ra$iotransmission an$ re%eption in one orseveral %ells

NS rtho"onal hannel Noise Sim lator

P MN P !li% an$ Mo!ile Net or

R- Ro tin" -rea

R-B Ra$io -%%ess Bearer

R-I Ro tin" -rea In$i%ator

R-N Ra$io -%%ess Net or

R-T Ra$io -%%ess Te%hnolo"'

RB Ra$io Bearer

RBS

Ra$io Base Station another name for the

No$e B

R3 Ra$io 3re6 en%'

R Ra$io in

RN Ra$io Net or ontroller

RR Ra$io Reso r%e ontrol

RS P Re%eive$ Si"nal o$e Po er

RSSI Re%eive$ Si"nal Stren"th In$i%atorSIB S'stem Information Blo%

SIR Si"nal to Interferen%e Ratio

TR9 Trans%eiver

T9 Transmit

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U5 User 56 ipment

U Up in

UMTSUniversal Mo!ile Tele%omm ni%ationServi%es

UTR-N UMTS Terrestrial Ra$io -%%ess Net or

: )M- :i$e!an$ o$e )ivision M ltiple -%%ess



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'% (vervie)Im &ementation

#"e N(N counter structure is s"o n in t"e *i!ure be&o .

#"e Radio Connection &eve& counters are t"e &o est &eve& o* counter used to *orm t"e B>Isin t"is section, t"ese are used in con unction it" 'sa!e and Ho( &eve& counters to identi*yand va&idate otentia& issues it" data t"rou!" ut.

Ca acity >&annin! and *eedbac &oo s5

%onitorin!

Com artmenta&i ed ) roac" to Investi!ation ; &oc in! >oints

Reso&ution

Im rovin! # > t"rou!" on!oin! ost &aunc" o timi ation covera!e and 3ua&ity5.

#"e *o&&o in! is a sim &i*ied e/tract *rom J1K, and out&ines t"e a&&ocation rocedure *or NR#DC . It is im ortant to understand "o a&&ocations are made in order to understand "ereand "y t"rou!" ut issues mani*est.

"R DC3 allocation &rocedure



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1. #"e ' $s eci*ic ca&& contro& entity sends a ca acity re3uest messa!e to t"e ce&&$s eci*ic >( see 1 in t"e *i!ure above5. #"e NR# DC re3uest is sent i* a DC isre3uired, *or e/am &e due to t"e *o&&o in! reasons7a. #"e ' moves *rom C ::LF)C ;>C to C ::LDC state due to ':;D:

ca acity re3uest immediate&y a*ter >( R) estab&is"ment or &ater5.b. #"e RNC receives a R)N)>7 R :+C)#I+N R H' (# messa!e *rom t"e

CN.c. #"e radio &in addition is needed in t"e so*t "andover case.d. #"e radio &in setu is needed in t"e "ard "andover case.

2. )*ter t"e R) "as been estab&is"ed, t"e *i&&in! *actor o* an R:C bu**er in eit"erRNC D:5 or ' ':5 must be "i!"er t"an t"e &o est t"res"o&d in order to startt"e DC a&&ocation rocedures. I* t"e *i&&in! *actor is &o er t"an t"e "i!"estt"res"o&d, &o bit rate is re3uested. I* t"e *i&&in! *actor is "i!"er t"an t"e "i!"estt"res"o&d, "i!" bit rate is re3uested. :o and "i!" t"res"o&ds are ce&&$s eci*icRN6 arameters.

#"e "i!"est ossib&e bit rate is ca&cu&ateda. I* &o bit rate is re3uested, t"e "i!"est ossib&e bit rate *or t"e re3uested

direction M

min initia& bit rate, R) ma/imum bit rate, ma/imum bit rate *rom t"e 'ca abi&ity oint o* vie , ma/imum bit rate in t"e ce&&5.

Initia& bit rate and ma/imum bit rate in t"e ce&& are ce&&$s eci*ic RN6arameters.

b. I* "i!" bit rate is re3uested, t"e "i!"est ossib&e bit rate *or t"e re3uesteddirection M

min R) ma/imum bit rate, ma/imum bit rate *rom t"e ' ca abi&ity oint o*vie , ma/imum bit rate in t"e ce&&5.

NoteIn a&& t"e above mentioned cases, t"e "i!"est ossib&e bit rate *or t"e return c"anne&

DC *or t"e ot"er direction5 is initia& bit rate.



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A. #"e re3uest counters are u dated.

4. #"e ca acity re3uest is ut in a 3ueue.

=. I* t"e ce&&$s eci*ic >( receives an RRI radio resource indication5 messa!e, t"eca acity re3uest s5 is removed *rom t"e 3ueue and rocessed as described int"e *o&&o in! ste s see = in t"e *i!ure above5.

@. #"e inter*erence is c"ec ed and t"e bit rates are se&ected.a. First it is c"ec ed "et"er it is ossib&e *rom t"e inter*erence oint o* vie to

a&&ocate t"e "i!"est ossib&e bit rate *or t"e DC o* t"e re3uested direction.b. I* t"e "i!"est ossib&e bit rate is not ossib&e due to ce&& &oad, it is c"ec ed

"et"er a &o er bit rate is ossib&e.c. I* no bit rate is ossib&e, t"e ca acity re3uest is ut bac in t"e 3ueue.

E. It is c"ec ed "et"er t"e initia& bit rate can be admitted to t"e return DC *romt"e inter*erence oint o* vie . I* t"e initia& bit rate cannot be admitted to t"e returnDC , t"e ca acity re3uest is ut bac in t"e 3ueue.

8. #"e code avai&abi&ity *or t"e D: DC is c"ec ed.a. It is c"ec ed "et"er t"ere are codes avai&ab&e *or t"e D: DC it" se&ected

bit rate. I* t"ere are, t"e rocedure continues as described in ste 9.b. I* t"ere are no codes avai&ab&e, t"e D: DC re ect counter is u dated and t"e

ne!ative ac no &ed!ement is sent to t"e ca&& contro& entity. #"e NR# DCa&&ocation rocedure ends *rom t"e tra**ic measurement oint o* vie .

9. 6"en it is ossib&e to start t"e setu or modi*ication rocedures, a messa!e issent to t"e ca&& contro& entity by t"e ce&&$s eci*ic >(.

10. #"e setu or recon*i!uration rocedures *or t"e radio &in are e/ecuted by t"eca&& contro& entity. #"at is, t"e #(, )):2 trans ort, RNC interna& resources, and' are re5con*i!ured.

11. ) messa!e, "ic" te&&s "et"er t"e setu rocedures ere success*u& or not, issent to t"e ce&&$s eci*ic >( by t"e ca&& contro& entity.

U&grade of 67isting DC3I* t"e initia& bit rate is a&&ocated, and t"e *i&&in! *actor o* t"e R:C bu**er in eit"er t"e RNC or' e/ceeds t"e "i!"est t"res"o&d, t"e ca&& contro& entity sends a DC re3uest to t"e ce&&$

s eci*ic >( in order to increase t"e bit rate. In t"is case, t"ere are some e/ce tions to t"erocedure described in t"e revious section.

#"e "i!"est ossib&e bit rate *or t"e re3uested direction M

min R) ma/imum bit rate, ma/imum bit rate *rom t"e ' ca abi&ity oint o* vie , ma/imum bit rate in t"e ce&&5.

#"e initia& bit rate is not used.



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I* t"is *ai&s, t"e ca&& contro& entity can re3uest &o er t"an t"e R) ma/imum bit rate in t"ene/t u !rade messa!e.

In most cases, t"e u !rade is re3uested eit"er *or t"e ': or t"e D: DC , not *or bot".

Downgrade of 67isting DC3I* t"e ce&& &oad is "i!", t"e ce&&$s eci*ic >( can order t"e ca&& contro& entity to decrease t"e bitrate o* some DC . #"en t"e ca&& contro& entity sends a DC re3uest do n!rade e/istin! bitrate5 bac to ce&&$s eci*ic >(. In most cases, t"e do n!rade is re3uested eit"er *or t"e ': ort"e D: DC $ not *or bot". #"e &o bit rate is re3uested as er ste 2.

In"erent&y t"e system or s to minimi e inter*erence and t"ere*ore i&& on&y a&&ocateresources as re3uired and avai&ab&e as out&ined above. From t"e descri tion a&one it isa arent t"at t"ere are a number o* oints o* interest "en investi!atin! t"rou!" ut. #"emet"odo&o!y *or investi!atin! t"rou!" ut issues described in t"is document *o&&o s t"e *&oo* t"e a&&ocation rocedure in reverse order. (tartin! it" t"e Iu>( and or in! *or ards

to ards t"e air inter*ace .



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*% Monitoring Data Throughput#"rou!" ut can be monitored at a number o* oints t"rou!"out t"e system. In t"is sectiont"e B>Is re&atin! to t"e R:C t"rou!" ut measurements are discussed. #"ese B>Is o**er t"enearest re resentation o* user e/ erience avai&ab&e in t"e R)N measurements. #"e

measurements are not a re resentation o* avai&ab&e t"rou!" ut, ea or ot"er ise, as t"eyare avera!ed *or a&& sessions over t"e measurement eriod, and are t"ere*ore "eavi&yin*&uenced by user be"avior. ) &ar!e ne!ative s"i*t in t"e basic t"rou!" ut B>Is may indicatea serious issue or sim &y a s"i*t in user be"avior caused by a ne a &ication or device.

It is t"ere*ore necessary to va&idate any c"an!e in er*ormance usin! ot"er metrics t"at "e&t"e en!ineer understand user be"avior.

#"e B>Is used in t"is section are !rou ed into *our sections7 #"rou!" ut, #ra**ic o&ume,(ession and o&d #ime. #"rou!" ut B>Is are used as a basic indicator, it" vo&ume,sessions and "o&d times used to va&idate any observed de!radation.

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A.1. #roug#&ut 8PI! 9 C+U" 6R!#"e B>Is in t"is section use counters "ic" measure R:C )% connections. #"e B>Is aret"e c&osest re resentation o* user t"rou!" ut avai&ab&e as t"ey are t"e nearest avai&ab&emeasurement to t"e a &ication &ayer it"in t"e R)N. #"e *o&&o in! dia!ram i&&ustrates t"e

user data *&o *rom t"e Iu>( to ards t"e %)C$d *or D: and %)C$d to ards t"e Iu>( *or':. #"e dotted area s"o s t"e *u&& ran!e o* measurements avai&ab&e in t"e %101E RC>%R:C measurement !rou . Note t"at current&y no bu**er occu ancy B>Is "ave been madeavai&ab&e via #$>I%.

#"e B>Is re resent t"e avera!e t"rou!" ut *or a&& sessions over t"e &eve& o* a!!re!ationand time eriod.

A.1.1. P! R,, D: User Data #roug#&ut ;kb&sI Descri tion7 #"e avera!e do n&in net >D' t"rou!" ut o* R:C )% connections *or R99tra**ic. Does not inc&ude retransmissions. Does not inc&ude eriods "en t"e D:transmission bu**ers in R:C entity are em ty.

B>I Formu&a7

sum %101EC1=O%101EC295 ; sum %101EC295

Note7 t"is B>I is resented *or t"e sum *or a&& NR# R) s.

CountersCounter Descri tion ' dated :o!ica& #y e 'nit

%101EC1=#"e avera!e do n&in net >D' t"rou!" ut o* R:C )% connections. Does not

inc&ude retransmissions. Does not inc&ude eriods "en t"e D: transmission bu**ersin t"e R:C entity are em ty.

6"en t"e R:C )% connection ismodi*ied or re&eased. )vera!e b s

%101EC29

#"e tota& time eriod "en t"e measurement as active in t"e R:C )% D: entity.#"e active time is t"e time bet een "en t"e *irst R:C (D' arrives in t"e R:Cbu**er and "en a&& t"e R:C >D's o* t"e ac et ca&& "ave been ac no &ed!ed.

>eriods "en t"e D: transmission bu**ers are em ty are e/c&uded.

6"en t"e R:C )% connection ismodi*ied or re&eased. (um ms



15/50


A.1.2. P! D: 777 RA2 #roug#&ut ;kb&sI Descri tion7 #"e avera!e do n&in net >D' t"rou!" ut o* R:C )% connections *or ///R) R99 tra**ic. Does not inc&ude retransmissions. Does not inc&ude eriods "en t"e D:transmission bu**ers in R:C entity are em ty.

B>I Formu&a7

sum %101EC1=O%101EC295 ; sum %101EC295 *or /// R)

Note7 #"is !rou o* B>Is rovides avera!e t"rou!" ut *or eac" bearer, t"ere are 8 B>Is intota& A84 , 2=@ ,128 , @4 , A2 , 1@ , 8 and si!na&in!. #"e B>I *ormu&a uses se aratebearer ob ects rat"er t"an t"e sum o* a&& as *or >( R99 D: 'ser Data #"rou!" ut.


%101EC1=

#"e avera!e do n&in net >D' t"rou!" ut o* R:C )% connections. Does not



%101EC29




A.1.A. P! R,, U: User Data #roug#&ut ;kb&sI Descri tion7 #"e number o* received R:C )% >D's in u &in *or t"e tota& time eriod"en t"e measurement as active in t"e R:C )% ': entity. #"e active time is t"e time

bet een t"e *irst R:C (D' arrivin! in t"e R:C bu**er and "en a&& t"e R:C >D's o* t"eac et ca&& "ave been ac no &ed!ed.

B>I Formu&a7

sum %101ECA2 O A205 ; sum %101ECAA5

Note7

1. #"is B>I is resented *or t"e sum *or a&& NR# R) s.

2. #"e mu&ti &ier in t"e numerator is t"e R:C >D' ay&oad si e *or t"e AA@ bits >D' si e.


%101ECA2 #"e number o* received R:C )% >D's in u &in .6"en t"e R:C )% connection is

modi*ied or re&eased.(um Inte!e

%101ECAA

#"e tota& time eriod "en t"e measurement as active in t"e R:C )% ': entity.#"e active time is t"e time bet een "en t"e *irst R:C (D' arrives in t"e R:Cbu**er and "en a&& t"e R:C >D's o* t"e ac et ca&& "ave been ac no &ed!ed.

>eriods "en t"e transmission bu**ers are em ty are e/c&uded.

6"en t"e R:C )% connection ismodi*ied or re&eased.

(um ms

#$%obi&e '(), INC. Con*identia& Rev. 1.0 February 2, 2009 1= o* =0


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A.1.4. P! U: 777 RA2 #roug#&ut ;kb&sI Descri tion7 #"e avera!e u &in net >D' t"rou!" ut o* R:C )% connections *or A84R) R99 tra**ic. #"e active time is t"e time bet een t"e *irst R:C (D' arrivin! in t"e R:C

bu**er and "en a&& t"e R:C >D's o* t"e ac et ca&& "ave been ac no &ed!ed.B>I Formu&a7

sum %101ECA2 O A205 ; sum %101ECAA5 *or /// R)

Note7

1. #"is !rou o* B>Is rovides avera!e t"rou!" ut *or eac" bearer, t"ere are 8B>Is in tota& A84 , 2=@ ,128 , @4 , A2 , 1@ , 8 and si!na&in!. #"e B>I *ormu&auses se arate bearer ob ects rat"er t"an t"e sum o* a&& as *or >( R99 ': 'serData #"rou!" ut.

2. #"e mu&ti &ier in t"e numerator is t"e R:C >D' ay&oad si e *or t"e AA@ bits>D' si e.


%101ECA2 #"e number o* received R:C )% >D's in u &in .6"en t"e R:C )% connection is

modi*ied or re&eased.(um Inte!e

%101ECAA

#"e tota& time eriod "en t"e measurement as active in t"e R:C )% ': entity.#"e active time is t"e time bet een "en t"e *irst R:C (D' arrives in t"e R:Cbu**er and "en a&& t"e R:C >D's o* t"e ac et ca&& "ave been ac no &ed!ed.

>eriods "en t"e transmission bu**ers are em ty are e/c&uded.


(um ms

A.1.=. 3!DPA User Data #roug#&ut ;kb&sI Descri tion7 #"e avera!e do n&in net >D' t"rou!" ut o* R:C )% connections *or(D>) tra**ic. Does not inc&ude retransmissions. Does not inc&ude eriods "en t"e D:

transmission bu**ers in R:C entity are em ty.

B>I Formu&a7

sum %101EC1=O%101EC295 ; sum %101EC295

Note7 sum *or a&& ($D(C a&&ocations.

Counters

#$%obi&e '(), INC. Con*identia& Rev. 1.0 February 2, 2009 1@ o* =0


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Counter Descri tion ' dated :o!ica& #y e 'nit

%101EC1=#"e avera!e do n&in net >D' t"rou!" ut o* R:C )% connections. Does not



%101EC29




A.2. raffic =olume 8PIs 9 C+U" 6R!#ra**ic vo&ume or ay&oad B>I s are use*u& *or understandin! trends in subscriber be"aviorand are used in con unction it" ot"er metrics to determine va&idity o* trends observed. Int"e same ay t"at an en!ineer ou&d va&idate a "i!" dro ca&& rate by c"ec in! *or tra**icconsistency t"ese B>Is can be used to va&idate t"rou!" ut issues.

#"ese B>I s are articu&ar&y im ortant t"rou!" t"e ear&y !ro t" "ase o* a ne net or ast"ey "e& t"e en!ineer *ocus on critica& issues.

#"e vo&ume B>Is can be vie ed at a summary &eve& or at t"e individua& bearer &eve&.#y ica&&y summary &eve& tra**ic vo&ume is used *or trendin! user be"avior and tra**ic vo&umeo* individua& bearers used *or troub&es"ootin! as t"ey rovide an indication o* t"e ty e o*bearer a&&ocation and t"e amount o* use o* t"is bearer.

A.2.1. 3!DPA raffic =olume ;M2I Descri tion7 #"is metric measures (D>) >ay&oad tra**ic vo&ume in % . #"e number o*(D' bytes transmitted in do n&in usin! R:C )%. #"e R:C (D' ay&oad measurin! ismade *or com ressed bytes a*ter >DC> in D:5 and inc&udes R:C (D' "eaders. Discarded(D's are inc&uded.

B>I Formu&a7

%101ECA1 ; 1024O10245

Note7

1. B>I resents tra**ic vo&ume *or (D>) connections on&y.

2. 1024 O 1024 is used in t"e denominator to convert to % .

Counters7Counter Descri tion ' dated :o!ica& #y e 'nit

%101ECA1

#"e number o* (D' bytes transmitted in do n&in usin!R:C )%. #"e R:C (D' ay&oad measurin! is made *orcom ressed bytes a*ter >DC> in D:5 and inc&udes R:C

(D' "eaders.Discarded (D's are inc&uded.


(um byte

#$%obi&e '(), INC. Con*identia& Rev. 1.0 February 2, 2009 1E o* =0


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A.2.2. P! D: 2ackground =olume ;M2I Descri tion7 #"is metric measures (D>) >ay&oad tra**ic vo&ume in % . #"e number o*(D' bytes transmitted in do n&in usin! R:C )%. #"e R:C (D' ay&oad measurin! ismade *or com ressed bytes a*ter >DC> in D:5 and inc&udes R:C (D' "eaders. Discarded(D's are inc&uded.

B>I Formu&a7%101ECA1 ; 1024O10245

Note7

1. B>I resents tra**ic vo&ume *or a&& R99 D: R) s.



%101ECA1




(um byte

A.2.A. P! D: 7778 raffic =olume ;M2I Descri tion7 #"is metric measures (D>) >ay&oad tra**ic vo&ume in % . #"e number o*(D' bytes transmitted in do n&in usin! R:C )%. #"e R:C (D' ay&oad measurin! ismade *or com ressed bytes a*ter >DC> in D:5 and inc&udes R:C (D' "eaders. Discarded(D's are inc&uded.

B>I Formu&a7%101ECA1 ; 1024O10245

Note7

1. #"is !rou o* B>Is rovides tra**ic vo&ume *or eac" bearer, t"ere are 8 B>Is intota& A84 , 2=@ ,128 , @4 , A2 , 1@ , 8 and si!na&in!. #"e B>I *ormu&a usesse arate bearer ob ects rat"er t"an t"e sum o* a&& as *or >( D: bac !roundvo&ume.



%101ECA1




(um byte



19/50


A.2.4. P! U: 2ackground =olume ;M2I Descri tion7 #"is metrics measures >ac et ( itc" u &in bac !round vo&ume in%e!abyte.

B>I Formu&a7

%101ECA0 ; 1024O10245Note7

1. B>I resents tra**ic vo&ume *or a&& R99 ': R) s.



%101ECA0

#"e number o* (D' bytes transmitted in u &in usin!R:C )%. #"e R:C (D' ay&oad measurin! is made *or

com ressed bytes be*ore >DC> in ':5 and inc&udesR:C (D' "eaders.


(um byte

A.2.=. P! U: 7778 raffic =olume ;M2I Descri tion7 #"is metrics measures >ac et ( itc" u &in bac !round vo&ume in%e!abyte.

B>I Formu&a7

%101ECA0 ; 1024O10245

Note7

1. #"is !rou o* B>Is rovides tra**ic vo&ume *or eac" bearer, t"ere are 8 B>Is intota& A84 , 2=@ ,128 , @4 , A2 , 1@ , 8 and si!na&in!. #"e B>I *ormu&a usesse arate bearer ob ects rat"er t"an t"e sum o* a&& as *or >( ': bac !roundtra**ic vo&ume.



%101ECA0

#"e number o* (D' bytes transmitted in u &in usin!R:C )%. #"e R:C (D' ay&oad measurin! is made *or

com ressed bytes be*ore >DC> in ':5 and inc&udesR:C (D' "eaders.


(um byte

A.A. !ession 8PIs 9 C+U" 6R!#"e ca&& *&o dia!ram be&o i&&ustrates t"e u date ositions *or counters used in t"e sessionB>Is. #"e >( (ession counters are u dated at t"e success*u& com &etion o* t"e R)

)CC (( > )( o* ca&& setu , "i&e t"e (D>) P(essionQ counters are u dated durin! t"eR) )C#I "ase. )s t"e R) can be recon*i!ured a number o* times durin! t"e )C#I



20/50


"ase it is robab&e t"at t"e (D>) sessions count i&& be &ar!er t"an t"e >( (essionscount, "ic" is a better re resentation o* t"e actua& number o* >( sessions.

A.A.1. 3!DPA !essions

B>I Descri tion7 #"is metrics measures t"e number o* (D>) Interactive and ac !roundsessions made durin! t"e measurement eriod.

B>I Formu&a7%1002CA8= %1002CA89

Note7

1. #"is B>I re resents (D>) %)C$d *&o a&&ocations rat"er t"an sessions. 6"i&eeac" user is a&&ocated on&y a sin!&e %)C$d *&o , it is ossib&e t"at t"e resources arerecon*i!ured more t"an once er user session.

2. B>I inc&udes bot" interactive and bac !round c&ass sessions.


%1001C121 u date

%1002CA89 u date


21/50



%1002CA8=#"e number o* ($D(C %)C$d *&o

a&&ocations in t"e (RNC *or interactive c&assconnections..

6"en t"e RNC "as received an RRC7R)DI+ )R R R C+NFI-'R)#I+N

C+%>: # messa!e *rom t"e ' $a*ter success*u& ($D(C %)C$d *&o

setu .

Cumu&ative Inte!e

%1002CA89.#"e number o* ($D(C %)C$d *&o

a&&ocations in t"e (RNC *or bac !round c&assconnections.

6"en t"e RNC "as received an RRC7R)DI+ )R R R C+NFI-'R)#I+N

C+%>: # messa!e *rom t"e ' $a*ter success*u& ($D(C %)C$d *&o

setu .

Cumu&ative Inte!e

A.A.2. P! !essions ;2ackground or InteractiveI Descri tion7 #"is metrics measures t"e number o* >( ac !round sessions madedurin! t"e measurement eriod.

B>I Formu&a7

%1001C121 or %1001C120

Note7

1. %1001C121 is *or ac !round, %1001C120 is *or Interactive t"ese are !iven asse arate B>Is in #$>I%.


%1001C120#"e number o* com &eted R) access

"ases *or >( data interactive.

6"en t"e RNC sends an R)N)>7 R) )((I-N% N# R (>+N( to t"e CNa*ter success*u& R) estab&is"ment *or

>( data interactive.

Cumu&ative Inte!

%1001C121#"e number o* com &eted R) access

"ases *or >( data bac !round.

6"en t"e RNC sends an R)N)>7 R) )((I-N% N# R (>+N( to t"e CNa*ter success*u& R) estab&is"ment *or

>( data bac !round.

Cumu&ative Inte!

A.4. Average 3old ime 8PIs 9 C+U" 6R!'n&i e R# R) s, NR# R) s can be assive it"out user &ane resources *or a &on! time,and t"ere*ore DC "o&din! times are a&so re3uired to s"o t"e activity o* t"e NR# R) .

A.4.1. Mean #old time RA2 for P! "R call

B>I Descri tion7 #"e mean "o&d time o* t"e R) *or >( NR# ca&&s.

B>I Formu&a7

%1001C209 %1001C2115; %1001C210 %1001C2125O@0O1005

Note7



22/50


1. #"e mu&ti &ier O@0O1005 converts t"e resu&t into minutes.

2. C209;C210 are t"e interactive com onent, C211;C212 are t"e bac !roundcom onent.


%1001C209

#"is counter measures t"e R) "o&din! time o* >( DataCa&&s it" interactive c&ass. #"is counter divided by t"e

denominator !ives t"e avera!e "o&din! time *or t"e R)ty e in 3uestion.

6"en an R) is re&eased. #"is counter is u datedto t"e ce&& *rom t"e R) as re&eased

sum 10m

%1001C210#"e denominator *or ('% +F R) +:DIN- #I% (

F+R >( D)#) IN# R). #"e number o* R) re&eases *or>( data interactive ca&&s.

In case o* >( data interactive ca&&, "en t"e RNCreceives eit"er an R)N)>7 R) )((I-N% N#

R (>+N( messa!e it" I 7 R) re&ease, or anR)N)>7 I' R : )( C+%%)ND messa!e.

Cumu&ative Inte!

%1001C211

#"is counter measures t"e R) "o&din! time o* >( Ca&&sit" bac !round c&ass. #"is counter divided by t"e

denominator !ives t"e avera!e "o&din! time *or t"e R)ty e in 3uestion.

6"en an R) is re&eased. #"is counter is u datedto t"e ce&& "ere t"e R) as re&eased. sum 10m

%1001C212#"e denominator *or ('% +F R) +:DIN- #I% (

F+R >( D)#) )CB-. #"e number o* R) re&eases *or

>( data bac !round ca&&s.

In case o* >( data bac !round ca&&, "en t"e RNCreceives eit"er an R)N)>7 R) )((I-N% N#

R (>+N( messa!e it" I 7 R) re&ease, or an

R)N)>7 I' R : )( C+%%)ND messa!e.

Cumu&ative Inte!

A.4.2. Mean #old time RA2 for P! "R call

B>I Descri tion7 #"e mean "o&d time o* t"e DC *or >( NR# ca&&s

B>I Formu&a7

%1001C21A %1001C21=5; %1001C214 %1001C21@5O@0O1005

Note7

1. #"e mu&ti &ier O@0O1005 converts t"e resu&t into minutes.

2. C21A;C214 are t"e interactive com onent, C21=;C21@ are t"e bac !roundcom onent.


%1001C21A

#"is counter measures t"e DC "o&din! time *or >( R)it" interactive c&ass service. #"is counter divided by t"e

denominator !ives t"e avera!e DC "o&din! time *or t"eR) ty e in 3uestion.

6"en t"e R) ty e in 3uestion is re&eased, t"iscounter is u dated by t"e tota& duration o* DC

"o&din! time durin! t"e R) &i*etime.sum 10m

%1001C214#"e denominator *or ('% +F DC +:DIN- #I% ( +F>( D)#) IN# R). #"e number o* R) re&eases *or >(

data interactive ca&&s.

In case o* >( data interactive ca&&, "en t"e RNCreceives eit"er an R)N)>7 R) )((I-N% N#


Cumu&ative Inte!

%1001C21=

#"is counter measures t"e DC "o&din! time *or >( R)it" bac !round c&ass service. #"is counter divided by

t"e denominator !ives t"e avera!e DC "o&din! time *ort"e R) ty e in 3uestion.

6"en t"e R) ty e in 3uestion is re&eased, t"iscounter is u dated by t"e tota& duration o* DC "o&din! time durin! t"e R) &i*etime.

sum 10m

%1001C21@#"e denominator *or ('% +F DC +:DIN- #I% ( +F>( D)#) )CB-. #"e number o* R) re&eases *or >(

data bac !round ca&&s.

In case o* >( data bac !round ca&&, "en t"e RNCreceives eit"er an R)N)>7 R) )((I-N% N#


Cumu&ative Inte!



23/50


A.=. Identification and =alidation of Data #roug#&ut Issues6"en re&yin! on net or measurements a&one it is di**icu&t to determine t"e e/istence o* anissue t"at ou&d a**ect an individua& user s e/ erience. (te c"an!e in vo&ume or t"rou!" utB>Is can indicate a *au&t or issue re3uirin! investi!ation or sim &y a s"i*t in user be"aviorIs it is ossib&e to observe t"e avera!e user t"rou!" ut, tra**ic datavo&ume, session counts and duration, a!!re!ated at 6C : &eve& t"rou!" to RNC &eve&.#rendin! t"is data over time enab&es t"e en!ineer to identi*y and veri*y otentia& datat"rou!" ut issues at a "i!" &eve& and 6C : s eci*ic issues i* trended at t"e &o est &eve&.

6"en vie in! avera!e t"rou!" ut at t"e RNC &eve&, a&& R:C connections over t"emeasurement eriod contribute to t"e resu&tin! avera!e, meanin! t"at *&uctuations in

er*ormance in a sin!&e 6C : or sma&& number o* 6C :s i&& not necessari&y be visib&e.

N+# 7 :on! term trendin! o* t"is data is current&y not avai&ab&e via re!iona& #$>I% orta&s( services are un&i e&y to s e t"e t"rou!" ut trendun&ess it resu&ts in a &on! outa!e across a &ar!e ortion o* t"e R)N causin! a si!ni*icantreduction in sam &es.

F&uctuation in t"ese B>Is is most &i e&y t"e resu&t o* a s"i*t in user be"avior caused by nea &ications ; service roviders ; devices. )n e/am &e o* t"is is t"e introduction o* t"e -1"andset to t"e #$%obi&e net or . #"e ee a&ive o&&in! and a &ications avai&ab&e on t"isdevice resu&t in a &ar!e number o* s"ort sessions it" &o ay&oad. )s a s"ort session st"rou!" ut i&& be a**ected more by #C> s&o start "i!"er &ayer t"rott&in! o* a &icationt"rou!" ut5 t"e resu&tin! avera!e t"rou!" ut "en a&& t"ese sessions are a!!re!ated is &o

"en com ared to t"e ea avai&ab&e t"rou!" ut. )ny sus ected s"i*t in user be"avior can be veri*ied usin! t"e sessions, vo&ume andavera!e "o&d time B>Is.

#"e *o&&o in! c"arts s"o e/am &es o* t"rou!" ut data trended at t"e RNC &eve& and 6 #(&eve&. #"e c"arts "ave been se arated into (D>) and R99 >( it" t"e R99 >( *urt"erbro en do n into t"e t"ree main bearers. /am &es o* t"e base B>Is are s"o n in t"e*o&&o in! t o *i!ures.

#$%obi&e '(), INC. Con*identia& Rev. 1.0 February 2, 2009 2A o* =0


24/50


Average #roug#&ut

0.00

=0.00

100.00

1=0.00

200.00

2=0.00

A00.00

1 2 A 4 = @ E 8 9 10 11 12 1A 14 1= 1@ 1E 18 19 20 21 22 2A

Days

k b & (D>) )vera!e

#"rou!" ut b s5

>( R99 D: 'ser Data#"rou!" ut b s5

R,, P! Average #roug#&ut

0.00

=0.00

100.00

1=0.00

200.00

2=0.00

A00.00

A=0.00

400.00

1 2 A 4 = @ E 8 9 10 11 12 1A 14 1= 1@ 1E 18 19 20 21 22 2A

Days

k b & s

>( R99 D: 'ser Data #"rou!" ut b s5

>( D: A84 R) #"rou!" ut b s5>( D: 128 R) #"rou!" ut b s5

>( D: @4 R) #"rou!" ut b s5



25/50


)n e/am &e o* (D>) t"rou!" ut in a sin!&e 6 #( over a t o ee eriod is rovidedbe&o . #"e *irst &ot s"o s t"e base monitorin! B>I, avera!e t"rou!" ut, it" t"esubse3uent &ot s"o in! t"e va&idation B>Is. #"e va&idation B>Is "ave been s"o n "our&y.

)vera!e (D>) #"rou!" ut

0

=0

100

1=0

200

2=0

A00

A=0

400

1 2 ; 1 E ; 2 0 0 8

1 2 ; 1 8 ; 2 0 0 8

1 2 ; 1 9 ; 2 0 0 8

1 2 ; 2 0 ; 2 0 0 8

1 2 ; 2 1 ; 2 0 0 8

1 2 ; 2 2 ; 2 0 0 8

1 2 ; 2 A ; 2 0 0 8

1 2 ; 2 4 ; 2 0 0 8

1 2 ; 2 = ; 2 0 0 8

1 2 ; 2 @ ; 2 0 0 8

1 2 ; 2 E ; 2 0 0 8

1 2 ; 2 8 ; 2 0 0 8

1 2 ; 2 9 ; 2 0 0 8

1 2 ; A 0 ; 2 0 0 8

k b &

)vera!e o* D: ( # > b s5

Date

Data #roug#&ut =alidation

0

200

400

@00

800

1000

1200

1400

1@00

1 11 21 A1 41 =1 @1 E1 81 91 101 111 121 1A1 1 41 1=1 1@1 1 E1 181 191 2 01 211 221 2A1 2 41 2=1 2@1 2E1 281 291 A01 A11

3ours

k b > k b & s

> s e s s

i o n

0

10

20

A0

40

=0

@0

! e c o n

d s

> M b

)vera!e DC "o&d time s5 ( ((I+N( D: ( # > b s5 D: +: % 5 B ; ( ((I+N

It is evident t"at t"e observed increase in t"rou!" ut on t"e 12;2E /$a/is 22E$2=0 inva&idation &ot5 is due to an increase in session ay&oad ; "o&d time corres ondin! to atem orary s"i*t in user be"avior.

#$%obi&e '(), INC. Con*identia& Rev. 1.0 February 2, 2009 2= o* =0


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+% Troubleshooting Data Throughput6it"in t"e R)N, t"e main causes o* de!raded t"rou!" ut *rom a user ers ective5 are7

1. Fau&ts

2. Con*i!uration *eatures and associated arameter sets5A. Ca acity

4. Hua&ity

=. Covera!e

In a ne net or t"at "as &o service uti&i ation Fau&ts, Con*i!uration and Covera!e andHua&ity re&ated to Covera!e5 "ave t"e &ar!est in*&uence on data t"rou!" ut. )s uti&i ationincreases, ca acity and 3ua&ity re&ated to &oadin! become more reva&ent causes inde!radin! data t"rou!" ut *rom t"e user s ers ective.

Fau&ts and con*i!uration rob&ems are o*ten sim &e to identi*y and re3uire t"e &east amounto* e**ort to reso&ve. #$%obi&e "as >CI com &iance and a&arm c"ec in! avai&ab&e via7

Insert &in to >CI "ere

Insert &in to a&arm mana!ement documentation

#y ica&&y it"in t"e system t"ere i&& be a sin!&e b&oc in! or con!estion oint t"at a**ectsdata t"rou!" ut.

For e/am &e t"e air inter*ace ca acity ou&d not norma&&y be a bott&e nec *or datat"rou!" ut "ere t"e Iu "as been under dimensioned< "o ever s"ou&d t"is be reso&vedt"e air inter*ace ca acity may reac" a b&oc in! oint. It is im ortant to consider t"e systemend to end and ensure correct dimensionin! to ba&ance t"e avai&ab&e resource it" demandon t"e system.

Covera!e is di**icu&t to determine usin! net or B>Is a&one and "ere sus ected as a rootcause o* an issue under investi!ation, re3uires veri*ication it" drive survey measurement.

#"e *o&&o in! *i!ure s"o s a su!!ested or *&o *or underta in! a &o t"rou!" utinvesti!ation. ac" o* t"e main b&oc s are discussed in detai& in t"e *o&&o in! sections.

#$%obi&e '(), INC. Con*identia& Rev. 1.0 February 2, 2009 2@ o* =0


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O For )rea or RNC )ir Inter*ace troub&e s"ootin!, t"e rimary ur ose is to c"ec *or t"ee/istence o* a ide area e/terna& inter*erence source.

#$%obi&e '(), INC. Con*identia& Rev. 1.0 February 2, 2009 2E o* =0

:o #"rou!" utIssue +bserved

usin! Net or B>Is

)**ected )reaS

#roub&es"oot Iu #roub&es"ootIu>( ; Common

#rans ort

#roub&es"ootNode

(in!&e 6 #( )rea or RNC

#roub&es"oot )irInter*ace O

#roub&es"ootRNC

eri*y Issue it"D#

sca&ate toRe!iona& #eam ;

#ier II


28/50


,% Transport - "ubThe % rrent T7Mo!ile US- implementation of the NSN I ! is a sin"le ; %onfi" ration for

ser plane traffi% . -s this reso r%e is share$ for all ser $ata< prioriti=ation is ne%essar' an$as a res lt thro "hp t for NRT R>> / S)P- ith the lo est priorit' %an potentiall' $e"ra$e.

There are several hi"h level %o nters that in$i%ate %on"estion in the I !. These %o ntersrelate to a$mission %ontrol an$ s%he$ lin" al"orithms an$ %an !e fo n$ in the %on"estionI descri tion7 Counts t"e number o* seconds "ic" contain at &east A0 errored b&oc s orone or more de*ects.

B>I *ormu&a7

%=101C2

Note7


%=101C2

(evere&y rrored (econds ( (57 Counts t"e number o*seconds "ic" contain at &east A0 errored b&oc s or oneor more de*ects. rrored b&oc is a b&oc in "ic" one or

more bits are corru ted. De*ect7 :+(, :+F, )I(. ( ( is asubset o* (. ( ( are not incremented durin!

'navai&ab&e (econds ')(5.

#"e counter is incremented "en asecond contains at &east A0 errored

b&oc s or at &east one de*ect. #"e counteris not incremented durin! eriods o*

unavai&ab&e time ')(5. #"e va&ue o* t"ecounter is u dated every second.

Cumu&ative seconds



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=.1.A. Iub Ca&acity 3!DPA

B>I descri tion7 #"e avera!e trans ort ca acity in Iub t"at can be a&&ocated *or (D>)connections. o ever, t"e T("ared (D>) *&o contro& a&&ocationT arameter de*ines "o

muc" band idt" t"e (D>) connections can use.B>I *ormu&a7

%==0C0$ %==0C1$%==0C1@5;%==0CE

Note7

1. B>I *ound in #ransmission Re ort not current&y avai&ab&e.


%==0C0#"e !uaranteed ce&& rate *or )):2 at". #"is is t"e

ma/imum con*i!ured va&ue *or )):2 at" tra**ic ande3ua& to t"e )):2 CC >ea Ce&& rate >CR5.

#"e counter is u dated on&y *or C R ty e Cconnections. (tays constant t"rou!"out t"e

)):2 at" &i*ecyc&e.Current c s

%==0C1

#"e sum o* reserved ce&& rate sam &es ta en durin!measurement eriod. 6"en divided by %==0CE, it

roduces t"e avera!e reserved ce&& rate. I* t"e Cconnection is art o* a C bund&e, t"e counter is u dated

it" t"e sam &ed avai&ab&e ca acity va&ue o* t"e "o&ebund&e ca acity *or NR# or (D>), de endin! on t"e

C ty e.

)dded to revious va&ue "en data is sam &ed.#"is va&ue is reset "en t"e counters are co&&ected

at t"e end o* measurement interva&.(um c s

%==0C@#"e ma/imum number o* connections in )):2 at"

durin! measurement eriod.

' dated "en t"e current number o* )):2connections is !reater t"an revious va&ue. #"isva&ue is reset "en t"e counters are co&&ected at

t"e end o* t"e measurement interva&.

%a/ Inte!er

%==0CE#"e number o* sam &es t"at can be used to ca&cu&ate

avera!e va&ues *or )):2 connections, (D>)connections as e&& as t"e avera!e a&&ocation *or (D>).

Incremented "en data is sam &ed. Cumu&ative Inte!er

=.1.4. AA:* Pat# Average Reserved 2andwidt# ;?I descri tion7 #"e ratio bet een t"e avera!e reserved band idt" and tota& band idt" o* )):2 at" estimated by C)C durin! measurement eriod. #"e )):2 at" is an )#% CCbet een t o )): ty e 2 entities. #"e "i!" reservation &eve& may cause b&oc in! o* radiobearer setu .

B>I *ormu&a7

100O %==0C1;%==0CE;%==0C05

Note7

1. B>I *ound in #rans ort Re ort not current&y avai&ab&e.

Counters

#$%obi&e '(), INC. Con*identia& Rev. 1.0 February 2, 2009 A0 o* =0


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%==0C0#"e !uaranteed ce&& rate *or )):2 at". #"is is t"e

ma/imum con*i!ured va&ue *or )):2 at" tra**ic ande3ua& to t"e )):2 CC >ea Ce&& rate >CR5.

#"e counter is u dated on&y *or C R ty e Cconnections. (tays constant t"rou!"out t"e

)):2 at" &i*ecyc&e.Current c s

%==0C1

#"e sum o* reserved ce&& rate sam &es ta en durin!measurement eriod. 6"en divided by %==0CE, it

roduces t"e avera!e reserved ce&& rate. I* t"e Cconnection is art o* a C bund&e, t"e counter is u dated

it" t"e sam &ed avai&ab&e ca acity va&ue o* t"e "o&ebund&e ca acity *or NR# or (D>), de endin! on t"eC ty e.

)dded to revious va&ue "en data is sam &ed.#"is va&ue is reset "en t"e counters are co&&ected

at t"e end o* measurement interva&.

(um c s

%==0CE#"e number o* sam &es t"at can be used to ca&cu&ate

avera!e va&ues *or )):2 connections, (D>)connections as e&& as t"e avera!e a&&ocation *or (D>).

Incremented "en data is sam &ed. Cumu&ative Inte!er

=.1.=. AA:* Pat# Ma7imum Reserved Cell Rate ;cells9sI descri tion7 #"e ma/imum reserved ce&& rate o* )):2 at" durin! measurement interva&.

B>I *ormu&a7

ma/ %==0CA5Note7

1. B>I *ound in #rans ort Re ort not current&y avai&ab&e.


%==0CA

#"e ma/imum reserved ce&& rate o* )):2 at" durin!measurement interva&. I* t"e C connection is art o* a

C bund&e, t"e counter is u dated it" t"e ma/imumavai&ab&e ca acity va&ue o* t"e "o&e bund&e ca acity * or

t"e NR# or (D>), de endin! on t"e C ty e.

' dated "en t"e current reserved ce&& ratee/ceeds t"e revious va&ue. #"is va&ue is reset

"en t"e counters are co&&ected at t"e end o*measurement interva&.

%a/ c s

=.1.@. U: =CC Utili@ation ;?I descri tion7 stimation o* t"e uti&i ation o* t"e user &ane C in t"e ': directionIN-R (( *rom RNC >+ 5.

B>I *ormu&a7

100 O J%=A0C0 ; %=A0C4O%easurement >eriod s55K

Note7

1. B>I *ound in must be ca&cu&ated *rom R)6 data, not avai&ab&e in #$>I%.

2. #"is B>I is t"e avera!e uti&i ation over t"e measurement eriod, s"ort eriods o*"i!" usa!e i&& be mas ed by t"e avera!in!.

Counters



32/50



%=A0C0

#"e number o* in!ress ce&&s transmitted t"rou!" a virtua&c"anne& connection in t"e in!ress direction. #"e receivedce&&s are art&y stored in t"e bu**er,t"e ot"er ce&&s i&& be

transmitted. ut some ce&&s are dro ed it"outtransmitted.

6"en an )#% ce&& is transmitted t"rou!"a virtua& c"anne& connection in t"e in!ress

direction.Cumu&ative ce&&

%=A0C4#"e con*i!ured in!ress band idt" *or t"e virtua& c"anne&

connection.#"is va&ue is sam &ed at t"e end o* t"e

measurement eriod.Current c s

=.1.E. D: =CC Utili@ation ;?I descri tion7 stimation o* t"e uti&i ation o* t"e user &ane C in t"e do n&in direction-R (( *rom RNC >+ 5.

B>I *ormu&a7

100 O J%=A0C1 ; %=A0CEO%easurement >eriod s55K

Note7

1. B>I *ound in must be ca&cu&ated *rom R)6 data, not avai&ab&e in #$>I%.

2. #"is B>I is t"e avera!e uti&i ation over t"e measurement eriod, s"ort eriods o*"i!" usa!e i&& be mas ed by t"e avera!in!.


%=A0C1

#"e number o* e!ress ce&&s transmitted to a virtua&c"anne& connection in t"e e!ress direction. #"e receivedce&&s are art&y stored in t"e bu**er,t"e ot"er ce&&s i&& be

transmitted. ut some ce&&s are dro ed it"outtransmitted.

6"en an )#% ce&& is transmitted to avirtua& c"anne& connection in t"e e!ress

direction.Cumu&ative ce&&

%=A0CE#"e con*i!ured e!ress band idt" *or t"e virtua& c"anne&

connection.#"is va&ue is sam &ed at t"e end o* t"e

measurement eriod.Current c s



33/50


=.2. roubles#ooting 9 +&timi@ation6"en investi!atin! t"e Iub t"e en!ineer s"ou&d *irst veri*y t"at C+C+ arameters arecom &iant it" t"e #$%obi&e de*au&ts, i* *ound to be non$com &iant, arameters must bea&i!ned and er*ormance monitored. I* a&i!ned, c"ec *or #1 errors, "i!" instances o*

rrored (econds (5 or (evere&y rrored (econds ( (5 can cause an increase not on&yin access, a&&ocation and retention *ai&ures but a&so increase retransmissions, and asretransmissions are not inc&uded in t"e t"rou!" ut B>I ca&cu&ation, i&& resu&t in &o er Pend$userQ t"rou!" ut.

#"e ne/t ste is to revie t"e a&&ocation B>Is. nsure t"at t"e &o est reso&ution ossib&e isse&ected, sin!&e 6 #( at 1=min or "our&y interva&s de endin! on avai&abi&ity. )s t"e B>Isare an accumu&ation over t"e measurement eriod, t"e s"orter t"is eriod is t"e more use*u&t"ese B>Is are.

#"e B>I7 Iub Ca acity (D>), !ives t"e )vera!e avai&ab&e ca acity non$a&&ocated 65 ont"e Iub over t"e measurement eriod.

#"e )):2 at" avera!e reserved 6 is t"e reci roca& o* t"e above B>I, eit"er s"ou&drovide an indicator o* "i!" reservation o* resources. I* t"ese B>Is s"o &o reservation and

t"e ma/imum reservation B>I is "i!", t"is indicates s"ort eriods o* "i!" use it"in t"emeasurement eriod.

I* reservation is "i!" t"e ne/t ste is to c"ec t"e uti&i ation. 'ti&i ation can be c"ec ed usin!t"e %=A0;212 )#% irtua& C"anne& Connection counter !rou avai&ab&e t"rou!" t"e RNCa &ication &aunc"er too&7 N %easurement / &orer, or e/tracted direct&y *rom t"e +((bac end *rom tab&e no r L sLatmvccLa&u1Lra . #"e data s"ou&d be e/tracted *or CI$40

'ser >&ane C on t"e Iu 5 *or t"e 6 #( under investi!ation.

It is ossib&e t"at t"e )):2 resources are reserved but not *u&&y uti&i ed, i* t"is *ound to bet"e case it is t"e resu&t o* ine**icient use o* t"e Iub re&atin! to *eature im &ementation. I*observed t"is s"ou&d be esca&ated to t"e re!iona& team *or more detai&ed ana&ysis.

#"e *o&&o in! *i!ure s"o s t"e su!!ested met"odo&o!y *or investi!atin! Iu issues

#$%obi&e '(), INC. Con*identia& Rev. 1.0 February 2, 2009 AA o* =0


34/50


Iub roubles#ooting Process


sca&ate toF+>s *orreso&ution

i!" ( ; ( (

sca&ate to >&annin!#eam *or / ansion

(tart Iub Investi!ation

-oto Node ard areInvesti!ation

C"ec *or #ransmissionrrors

C"ec Iub resourcea&&ocation

"i!"

none

&o

C"ec Iub resourceuti&i ation

&o

"i!"

sca&ate to re!iona& team *or*urt"er investi!ation

C"ec C+C+ arametercom &iance

)&i!n non$com &iantarameters, monitor

Non$com &iant

Com &iant


35/50


.% Node / ard)areThe primar' &PI for investi"ation of No$e B iss es is ar$ are apa%it' in the form of

hannel 5lement meas rements. Po er an$ Interferen%e oa$ an$ o$e sa"e are$is% sse$ in the -ir Interfa%e se%tion.

The fi" re !elo $ispla's the 3le?i BTS %apa%it' str %t re. Note that the li%ense$ %apa%it' is$efine$ as ? 5 "ivin" ? ) 5 an$ ? U 5< here ? is the availa!le %apa%it' !asi% Gli%ense$C< % rrentl' ? H 240.

The ma? %apa%it' for a sin"le s'stem mo$ le is 240 %hannel elements< e?ten$a!le onl' ! 'a$$in" s'stem mo$ les to the site.

@.1. 8PI! 9 C+U" 6R!

@.1.1. Avg "br Available C6

B>I descri tion7 )vera!e number o* avai&ab&e C"anne& &ements.

B>I *ormu&a7

%=001C2

Note7 (am &in! >eriod *or ra counters is 20s.

Counters


%=001C2

)vera!e number o* avai&ab&e C"anne& &ements. I.e.avera!e amount o* or in! baseband resources 6

ca acity5 in '&tra(ite;%etro(ite #( and avera!e amounto* basic ca acity and &icensed ca acity to!et"er in F&e/i

6CD%) #(.

#"e counter is u dated over t"e measurementeriod. #"e va&ue o* t"e counter is t"e avera!e

va&ue *rom a&& t"e sam &es durin! t"emeasurement eriod.

)vera!e Inte!er

#$%obi&e '(), INC. Con*identia& Rev. 1.0 February 2, 2009 A= o* =0


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@.1.2. Min "br Available C6

B>I descri tion7 %inimum number o* avai&ab&e C"anne& &ements. B>I *ormu&a7

%=001C1

Note7


%=001C1

%inimum number o* avai&ab&e C"anne& &ements. I.e.minimum amount o* or in! baseband resources 6

ca acity5 in '&tra(ite;%etro(ite #( and minimumamount o* basic ca acity and &icensed ca acity to!et"er

in F&e/i 6CD%) #(.

6"en t"e 6 situation c"an!es in t"e #(. %in Inte!er

@.1.A.Ma7 "br Used C6 D:

B>I descri tion7 %a/imum number o* used C"anne& &ements in Do n&in direction.

B>I *ormu&a7%=001CA



%=001CA %a/imum number o* used C"anne& &ements in Do n&indirection.

counter is u dated over t"e measurement eriod.#"e counter va&ue is ca&cu&ated on t"e cyc&e o* 20

seconds sam &es based on t"e ma/imum usedc"anne& e&ements in t"e D: direction.

%a/ Inte!e

@.1.4. Ave "br Used C6 D:

B>I descri tion7 )vera!e number o* used C"anne& &ements in Do n&in direction.

B>I *ormu&a7

%=001CE



%=001CE )vera!e number o* used C"anne& &ements in Do n&in

direction.



)vera!e Inte!er

@.1.=.Ma7 "br Used C6 U:

B>I descri tion7 %a/imum number o* used C"anne& &ements in ' &in direction.

B>I *ormu&a7

#$%obi&e '(), INC. Con*identia& Rev. 1.0 February 2, 2009 A@ o* =0


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%=001C4



%=001C4%a/imum number o* used C"anne& &ements in ' &in

direction.

#"e counter is u dated over t"e measurementeriod. #"e counter va&ue is ca&cu&ated on t"ecyc&e o* 20 seconds sam &es based on t"ema/imum used c"anne& e&ements in t"e ':

direction.

%a/ Inte!e

@[email protected] "br Used C6 U:

B>I descri tion7 )vera!e number o* used C"anne& &ements in ' &in direction.

B>I *ormu&a7

%=001C8

Note7 (am &in! >eriod *or ra counters is 20s.Counters


%=001C8 )vera!e number o* used C"anne& &ements in ' &in

direction.



)vera!e Inte!er

#$%obi&e '(), INC. Con*identia& Rev. 1.0 February 2, 2009 AE o* =0


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@.2. R+U2:6!3++ I"$ 9 +P IMI A I+"#"e avai&abi&ity B>Is indicate t"e avera!e and ma/imum avai&ab&e C ca acity over t"emeasurement eriod. For a 6 #( under norma& o eration t"e va&ue o* t"ese counterss"ou&d e3ua& t"e &icensed ca acity, i* t"e avai&ab&e C de!rades durin! a measurement

eriod t"e ma/imum avai&ab&e C B>I i&& remain at &icensed ca acity and avera!e avai&ab&eC B>I i&& reduce, i* t"e C ca acity is de!raded *or a "o&e measurement eriod bot"B>Is i&& be &ess t"an t"e &icensed ca acity.

#"e use B>Is indicate t"e avera!e and ma/imum number o* C used over t"emeasurement eriod. I* t"e va&ue o* t"e ma/imum *or eit"er ': or D: a roac"es t"e&icensed ca acity o* t"e 6 #(, but t"e avera!e remains it"in norma& o eratin! ran!e, t"isindicates instantaneous "i!" demand. I* bot" a roac" t"e avai&ab&e ca acity over t"emeasurement eriod t"en C con!estion is &i e&y resu&tin! in reduced t"rou!" ut.

#"e *o&&o in! *i!ure s"o s t"e su!!ested met"odo&o!y *or investi!atin! Node ca acityissues.

"ode2 roubles#ooting Process

Note t"at "i!" instantaneous &oad i&& be evident in %a/ C usa!e B>Is, "o ever may notbe evident in avera!e usa!e. sca&ate on&y i* "i!" ma/ usa!e is evident eriodica&&y.


(tart Node Ca acityInvesti!ation

C"ec C )vai&abi&ity

C"ec )vera!e C usa!e

C"ec %a/ C usa!e

-oto )ir Inter*ace

Investi!ation

(ite *au&t,correct *au&tand monitor

U avai&ab&e ca acity

M avai&ab&e ca acity

Can :oad beredistributed tosurroundin! sitesS

Ves er*ormnecessaryrecon*i!urationNo esca&ate to>&annin! team

"i!"

norma&

norma&


39/50


/am &e7 (in!&e #( ; 24 "rs

C6 Availability > Utili@ation

0

=0

100

1=0

200

2=0

A00

0 7 0 0

7 0 0

2 7 0 0

7 0 0

4 7 0 0

7 0 0

@ 7 0 0

7 0 0

8 7 0 0

7 0 0

1 0 7 0 0 7

0 0

1 2 7 0 0 7

0 0

1 4 7 0 0 7

0 0

1 @ 7 0 0 7

0 0

1 8 7 0 0 7

0 0

2 0 7 0

0 7 0 0

2 2 7 0 0 7

0 0

ime

B C 6

%in Nbr )vai&ab&e C

)v! Nbr )vai&ab&e C

%a/ Nbr 'sed C D:

)ve Nbr 'sed C D:

)ve Nbr 'sed C ':

%a/ Nbr 'sed C ':

Note t"e eriod o* decreased ca acity s"o n in %in Nbr )vai&ab&e C .

)&so note t"at t"e number o* C used *or ' &in bot" *or avera!e and ma/ e/ceeds t"atused in t"e do n&in , t"is is common due to t"e *i/ed a&&ocation *or (D>) and variab&ere3uirement *or t"e (D>) return c"anne& in t"e u &in .



40/50


0% Air "nterfaceFrom an o timi ation ers ective, t"e air inter*ace is "ere t"e o timi ation en!ineer can"ave t"e &ar!est im act on data t"rou!" ut. >ut sim &y, i* RF conditions are oor, &o ert"rou!" ut i&& resu&t. #"is is true *or bot" (D>) and R99. + timi in! t"e air inter*ace to

im rove R(C> and cIo i&& as a resu&t im rove t"rou!" ut *or (D>) users and R99users.

)ir Inter*ace ca acity in t"e *orm o* ': and D: :oadin! and code ca acity a&so im act datat"rou!" ut. From t"e net or ers ective "i!" uti&i ation o* t"ese resources resu&ts in "i!"system t"rou!" ut, but t"e individua& user e/ erience can be de!raded.

#"e s eci*ic counters and B>Is *or (D>) and R99 are resented se arate&y, it" commonB>Is discussed in t"e &ast section. )s t"e >( *unctiona&ity *or (D>) "as been moved tot"e 6 #( and *ast &in ada tion em &oyed t"ere is a !reater visibi&ity o* er*ormance overt"e air *or (D>) t"an *or R99 bearers.

E.1. 1P"S 2 #(UNT3RSIt is ossib&e to monitor not on&y t"e air inter*ace t"rou!" ut not re resentative o* individua&end to end t"rou!" ut5 but a&so s eci*ic attributes o* user be"avior suc" as user distributionand re orted 3ua&ity in t"e *orm o* CHI. #"ese B>Is and counters rovide t"e en!ineer it"in*ormation to "e& better dia!nose rob&ems re&atin! to data t"rou!" ut .

E.1.1. 3!DPA

4'('('(' Air Interface 3!0D!C3 MAC0d t#roug#&ut ;kb&sI descri tion7 #"e air inter*ace active ($D(C %)C$d t"rou!" ut *rom t"e net orers ective ca&cu&ated as t"e (D>) %)C$d t"rou!" ut at #(, divided by t"e active ($

D(C time *rom t"e net or ers ective. #"e active time re*ers to t"e sc"edu&ed ##Is,"en sendin! data. #"e t"rou!" ut is vie ed *rom t"e %)C$d &ayer, t"at is, "o muc"

%)C$d &eve& data t"e ($D(C is ab&e to success*u&&y trans*er to t"e ' s usin! t"esc"edu&ed ##Is. #"is considers a&so t"e %)C$"s e**iciency.

B>I *ormu&a7

sum %=000C12@ $ %=000C12E 55 ; sum %=000C@9 %=000CE0 %=000CE1 %=000CE2 %=000CEA %=000CE4 5;=005

Note7

1. )s t"e denominator is e**ective&y a sum o* ##I s dividin! by =00 !ives t"e denominator inseconds.

Counters



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%=000C12@ )mount o* data received *rom t"e RNC in %)C$d >D's6"en a %)C$d >D' is received by

t"e #(.(um i&obit

%=000C12E )mount o* data in %)C$d >D's discarded due to *&o contro&bu**er over*&o .

6"en a %)C$d >D' is dro ed*rom t"e #( bu**er due to

over*&o .(um i&obit

%=000C@9;E0;E1;E2;EA;E4 #"e ($(CC transmit o er measurement. Number o* ## Ismatc"in! to o er &imits o* c&ass 0;1;2;A;4;=

#"e ($(CC transmit o er ismeasured by eac" active ##I

"en sendin! data5 in #(. ac"active ##I increments t"e correctc&ass o* t"e ($(CC o er

distribution.

Cumu&ative Inte!e r

4'('('*' C I Distribution

#"ese B>Is are not current&y avai&ab&e or &anned *or H1 de &oyment in #$>I%. Counterscan be accessed direct&y in t"e RNC or +(( bac end.

B>I descri tion7 R)6 counters %=000C8 %=000CA8. Counters are u dated based on t"ere orted CHI va&ues *rom t"e ' s.

B>I *ormu&a7

sum %=000C85, sum %=000C95 W. sum %=000CA85

Note7

1. #"is B>I is not current&y in t"e roadma *or H1 im &ementation.

2. #"e CHI re&ates c&ose&y to t"rou!" ut as t"e &o er t"e va&ue o* CHI re orted t"e &o ert"e #FRC t"at can be a&&ocated to t"at user.


%=000C8 $CA9

Number o* re orted C"anne& Hua&ity Indicator CHI5va&ues "ere %=000C8 corres onds to a CHI va&ue o* 0

and %=000CA8 corres onds to a CHI va&ue o* A0.

#"e #( increments t"e c&assi*iedcounter de endin! on t"e CHI

va&ue re orted.Cumu&ative Inte!er

4'('('-' User Distribution

B>Is are *ound in t"e Con!estion re ort in #$>I%.

B>I descri tion7 #"is B>I is !iven as t"e sum o* time in seconds o* t"e (D>) active time

it" / number o* active users. 6"ere / is no active users,1$2,A$4,=$@,E$8,9$10,11$12, 1A$14,1=$1@,1E$20,21$24,2=$28,29$A2, AA$A@,AE$40,41$44,4=$485 over t"e observation eriod.

B>I *ormu&a7

sum %1000C1@E5, sum %1000C1@85 W. sum %1000C1E=5, sum %1000C2405 Wsum %1000C24E5



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Note7 t"e re orted va&ues are R)6 counter va&ues, sum is over measurement eriod at t"e*or t"e a!!re!ation &eve& c"osen.


%1000C1@E#"is counter indicates "o &on! time no (D>) users are a&&ocated

durin! t"e measurement eriod. Not u dated i* (D>) is disab&ed *ort"e ce&&.

)t 1$second interva&s it" va&ue 1 i* (D>)is enab&ed in t"e ce&& but t"ere are no

(D>) users a&&ocated.Cumu&ative seconds

%1000C1@8 $ C1E=#"is counter indicates "o &on! time 1 or 2 u to 1= or 1@ (D>)

users are a&&ocated durin! t"e measurement eriod. )t 1$second interva&s it" va&ue 1 i* t"ere

are / $ y (D>) users in t"e ce&&.Cumu&ative seconds

%1000C240 $ C24E#"is counter indicates "o &on! time 1E to 20 u to 4= to 48 (D>)

users are a&&ocated durin! t"e measurement eriod. )t 1$second interva&s it" va&ue 1 i* t"ere

are / $ y (D>) users in t"e ce&&.Cumu&ative seconds

4'('('.' Additional Counters

#"ere are severa& R)6 counters "ic" can assist it" *urt"er understandin! t"eer*ormance o* t"e ac et sc"edu&er. #"ese counters re&ate to retransmissions in t"e air

inter*ace, code distribution, and bu**er occu ancy. )&& counters are art o* t"e %=000 !rouand can be accessed direct&y at t"

UMTS Performance Trouble Shooting and Optimization Guidelines NSN Throughput

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