Improvement of TBF Establishment Success Rate

8/20/2019 Improvement of TBF Establishment Success Rate

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Improvement of TBF

Establishment Success RateR1.1


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Improvement of TBF Establishment Success Rate Internal Use Only▲

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Revision %istor&

$ro'uct (ersion )ocument (ersion Serial Number Reason for Revision

R1+! First publishe%

R1+1

The impact ofresource confi,urationon -&Is an% relevantstatisticmeasurements an%counters are a%%e%+

Author

)ate )ocument (ersion $repare' b& Revie*e' b& Approve' b&

(!1!.!".!5 R1+!

/uan Shuai

0ou Shuai an%

/an, /on,

#hen, 0ao an% Fei

)ipin,

(!1!.11.15 R1+1/uan Shuai

0ou Shuai/an, /on, an%2iao 3ian,

#hen, 0ao

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Inten'e' au'ience+ GS! net*or, optimi-ation enineers

$roposal+ Before rea'in this 'ocument/ &ou ha' better have the follo*in ,no*le'e an's,ills.

SE0 no*le'e an' s,ills Reference material

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(

4

Follo*2up 'ocument+ After rea'in this 'ocument/ &ou ma& nee' the follo*ininformation.

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(

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About This )ocument

Summar&

#hapter )escription

1 )bout TBF Intro%uces the concept of TBF+

( 0o8 to Improve the U9:;9 TBFEstablishment Success Rate

9ists the factors that may influence TBF establishment an%,ives confi,uration scheme to improve the U9:;9 TBFestablishment success rate+

4 U9:;9 TBF EstablishmentSuccess Rate

9ists formulae about TBF establishment success rate+

6 U9:;9 TBF Establishment&rocess

9ists TBF establishment process+

5 On.site Optimi


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T)B9E OF $O*TE*TS

1 About TBF ..................................................................................................................... 1

3 %o* to Improve the 4L5)L TBF Establishment Success Rate .................................. 3

6 4L5)L TBF Establishment Success Rate .................................................................... 74+1 U9 TBF Establishment Success Rate ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 4+( ;9 TBF Establishment Success Rate ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ?4+4 U9 &RS Establishment Success Rate +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 114+6 ;9 &RS Establishment Success Rate +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 11

4+5 U9 E&RS Establishment Success Rate +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1(4+7 ;9 E&RS Establishment Success Rate +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1(

8 4L5)L TBF Establishment $rocess ........................................................................... 166+1 U9 TBF Establishment &rocess +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 146+1+1 One.&hase U9 TBF Establishment &rocess on $$$0 +++++++++++++++++++++++++++++++++++++++ 146+1+( T8o.&hase U9 TBF Establishment &rocess on $$$0 +++++++++++++++++++++++++++++++++++++++ 166+1+4 U9 TBF Establishment &rocess on &)$$0 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 156+( ;9 TBF Establishment &rocess +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 176+(+1 ;9 TBF Establishment &rocess on $$$0 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 176+(+( ;9 TBF Establishment &rocess on &)$$0 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1"

9 n2site ptimi-ation #ases ....................................................................................... 175+1 ) $ase of TBF Establishment Success Rate Improvement for a *et8or@ in $hina A1

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 15+1+1 Bac@,roun% ;escription +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 15+1+( $ause )nalysis an% &roce%ure ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 15+1+4 Effect of &arameter =o%ification +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1?5+1+6 >erification of the &arameter =o%ification Effect ++++++++++++++++++++++++++++++++++++++++++++++++ (15+1+5 $han,e of Other In%icators )fter the &arameter =o%ification +++++++++++++++++++++++++++++ ((5+( ) $ase of TBF Establishment Success Rate Improvement for a *et8or@ in $hina A(

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ (45+(+1 Bac@,roun% ;escription +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ (45+(+( $ause )nalysis an% &roce%ure ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ (4

5+4 ) $ase of TBF Establishment Success Rate Improvement for an Overseas *et8or@+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ (5

5+4+1 Bac@,roun% ;escription +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ (55+4+( $ause )nalysis an% &roce%ure ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ (5

: Relate' !easurement an' #ounters ......................................................................... 377+1 &S Basic =easurement ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ (7+( Usa,e of &S Resources +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 4!7+4 U9:;9 &RS:E;E ;ata TBF +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 41

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1 About TBF

The temporary bloc@ flo8 ATBF is one of the most important concepts of the pac@et

service+ It is a physical connection use% by t8o ra%io resource ARR entities to transfer

99$ &;US in one %irection on pac@et %ata ra%io channels+ The TBF is allocate% ra%io

resources on one or more &;$0s an% comprises a number of R9$:=)$ bloc@s carryin,

one or more 99$ &;Us+ TBF is temporary an% is maintaine% only for the %uration of the

%ata transfer Athat is until there are no more R9$:=)$ bloc@s to be transmitte% an% in

R9$ ac@no8le%,e% mo%e all the transmitte% R9$:=)$ bloc@s have been successfully

ac@no8le%,e% by the receiver+ Each TBF is assi,ne% 8ith a temporary flo8 i%entity

ATFI by the net8or@+ The TFI acts as the =S i%entifier on the R9$:=)$ layer+ )n% one

TFI can be use% for transmissions in %ifferent %irections Auplin@ or %o8nlin@+ The TFI is

assi,ne% in the resource assi,nment messa,e an% is sent before the 99$ frame of a

TBF is sent+ )n R9$:=)$ bloc@ associate% 8ith a certain TBF must comprise a TFI+ If

an R9$ %ata bloc@ is transmitte% the TBF is i%entifie% by the TFI an% the %irection

Auplin@ or %o8nlin@ in 8hich the R9$ %ata bloc@ is sent+ If an R9$:=)$ control

messa,e is transmitte% apart from the TFI the transmission %irection an% the messa,e

type are also use% to i%entify the TBF+

In the &RS:E&RS -&I system U9:;9 TBF establishment success rate is a Cuite

important in%icator+ Dhether the TBF can be successfully establishe% %etermines

8hether %ata services can be provi%e% normally+ From the vie8 of users perception

TBF establishment success rate %etermines 8hether users can lo,on the Internet an%

8hether they can surf the internet fluently+ In a 8or% TBF establishment success rate is

the basis of &RS:E;E %ata transmission+

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3 %o* to Improve the 4L5)L TBF

Establishment Success Rate

To improve the U9:;9 TBF establishment success rate 8e nee% to start 8ith the TBF

establishment process+ There are many factors that influence the TBF establishment

success rate such as &$U processin, capability )bis transmission ban% 8i%th the

number of &;$0s an% the transmission BER on the Um interface an% the )bis

interface+ These factors 8ill influence the 8hole process of TBF establishment+ This

article intro%uces all the factors that may influence TBF establishment 8ith the analysis

of the TBF establishment process+ )n% it also ,ives su,,estions on ho8 to confi,ure

relevant parameters to improve the U9:;9 TBF establishment success rate+

1+ The TBF is fun%amental for the performance of all the %ata services+ To ensure

,oo% Internet eperience for users sufficient net8or@ resources shoul% be

,uarantee%+ The allocation of )bis resource an% ;S& resource has a ,reat

influence on TBF establishment+ It is recommen%e% to plan the net8or@ resources

in a%vance+ For the metho% of resources allocation see the relevant ,ui%e+ To

optimi


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a%opte% after the net8or@ receives #%ANNEL RE04EST from the =S it 8ill

allocate a sin,le bloc@ to the =S+ )n% on this sin,le bloc@ the =S 8ill sen%

$A#ET RES4R#E RE04EST 8hich carries some =S reCuest information+

)ccor%in, to the reCuirement of the =S the net8or@ 8ill allocate resources to it+

Only 8hen the net8or@ receives $A#ET RES4R#E RE04EST sent by the =S

on the sin,le bloc@ can t8o.phase access be successful+ Because there is Gust one

chance for the net8or@ to receive this messa,e if the U9 B9ER is too hi,h or the

messa,e is lost %urin, )bis transmission it is very li@ely that the BS$ 8ill fail to

receive this sin,le bloc@+ For one.phase access the BS$ has more than one

chance to receive the U9 bloc@+ Even if it fails to receive the U9 bloc@ for one time

the =S 8ill sen% ra%io bloc@s for many times+ )s lon, as the BS$ receives the U9

bloc@ %urin, a certain perio% AT4177 5S or 8ithin a certain number of bloc@s

A*41!6 A4 J Bs$v=a K ? J number of channels TBF lin@ can be successfully

establishe%+ Dhen the ra%io environment is not %esirable one.phase access is far

easier than t8o.phase access+ Therefore for fiel% optimi


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other relevant parts that may influence U9:;9 R9ev+ In traffic statistics unbalance

problem is usually in%icate% by bi, %ifference bet8een avera,e U9 R9ev an% ;9

R9ev poor U9 or ;9 R3ual Ahi,h proportion of R35 R37 an% R3" an% lo8

imme%iate allocation success rate or assi,nment success rate+ If there is

unbalance problem in the net8or@ you shoul% optimi

an% the net8or@ can use this fiel% to calculate the number of %ata bloc@s to be sent

on the uplin@ TBF+ In the settin, of this parameter Bs#v!a= T61>7 an%

N61?8ma= shoul% be ta@en into consi%eration+ For Bs#v!a= if the eten%e% TBFis not enable% ne8 %ata arrives after the count%o8n starts can only be transmitte%

on a ne8 TBF lin@+ If the eten%e% TBF is enable% 8hen ne8 %ata arrives after the

count%o8n starts $> 8ill count a,ain so that the ne8 %ata can be transmitte% over

the current TBF+ Therefore if this parameter value is too lar,e 8hen the =S that

%oes not support eten%e% U9 TBF transmits U9 %ata %iscontinuously it has to 8ait

until TBF is release% after $> is ? an% U9 TBF is reestablishe% so that ne8 %ata

can be transmitte%+ If this parameter value is too small the TBF establishment

success rate 8ill be impacte%+ Therefore proper settin, of this parameter 8ill help

increase the avera,e transmission rate+ )s for T61>7 proper settin, of the time

spent in 8aitin, for $A#ET A#5NA# 8ill facilitate 8in%o8 s8itch in the &S

service+ For *41!6ma 8hen N61?8 reaches *41!6ma the pac@et accessprocess 8ill restart+ If the preemptive Gu%,ment is not complete% after the pac@et

access process restarts for four times TBF establishment is re,ar%e% to be faile%+

Therefore proper settin, of N61?8ma= can help re%uce preemptive Gu%,ment time

an% facilitate the =S to restart the pac@et access process+ For &RS this

parameter is recommen%e% to be :N an% for E;E 13 is recommen%e%+

1!+ )r=Timer!a= optimi


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mo%e it 8ill stay in non.;RL mo%e for a 8hile+ Dhen TBF is release% an% the =S

is in non.;RL mo%e the =S 8ill monitor all the $$$0 bloc@s an% the &$U 8ill

@eep the =S relate% contet+ 0o8 lon, the =S relate% contet 8ill be @ept is

%etermine% by the minimum value of )r=Timer!a= an% Non)r=Timer + Dhen the

net8or@ is not confi,ure% 8ith the &$$$0 in non.;RL mo%e I!!E)IATE

ASSIG%!ENT #!!AN) can be transmitte% on the &$0 an% )$0 in about 6!

ms 8hich is much shorter than the time nee%e% to transmit this comman% in ;RL

mo%e+ Therefore %urin, the perio% of non.;RL mo%e TBF establishment time is

short+ In ;RL mo%e the =S can only monitor pa,in, messa,es in the home

pa,in, ,roup an% receive I!!E)IATE ASSIGN!ENT !ESSAGE on all the

pa,in, bloc@s an% )$0 reserve% bloc@s+ )n% the time for the =S to receive the

pa,in, messa,e is lon, Aon avera,e about half of the pa,in, multiframe cycle+ If

BS@$A@!FR!S is 3 the receivin, perio% is about (45 ms+ 0o8ever in non.;RL

mo%e =S consumes more po8er+ Therefore if the value of ;rTimer=a is lar,e

TBF establishment time can be shortene% but the =S consumes more po8er+ Ifthis value is small the =S consumes less po8erN ho8ever in ;RL mo%e because

the a%%ition of pa,in, process increases the si,nalin, loa% for the system %ata

transmission %elay 8ill increase+ In the current net8or@ )r=Timer!a= is ( s by

%efault+ It is su,,este% to mo%ify it to 6 s+

11+ NcNo)r=$er is a measurement parameter for net8or@ control an% is use% at the

=S si%e+ This parameter is broa%caste% to the =S in the &SI5 messa,e in%icatin,

the minimal time for the =S to stay in the non.;RL mo%e after sen%in, an *$

measurement report+ The %efault value of *$ is 3 A!+6 s+ It is recommen%e% to

mo%ify it to 8 A!+?7 s+

1(+ The settin, of N61?9+ ;urin, the process of pac@et ;9 transmission BSS 8ill set

the RRB& fiel% on the ;9 R9$ %ata bloc@ at a certain interval to notify the =S to

sen% the RL#5!A# #NTRL messa,e on the relevant U9 bloc@+ For a TBF if

the RL#5!A# #NTRL messa,e on the %esi,nate% U9 bloc@ is lost for over

*41!5ma times T61>9 8ill start+ Dhen T41?5 times out the net8or@ can use the

TFI resource a,ain+ The value of this parameter can be set to 1?+ Dhen the fiel%

ra%io environment is ba% the value can be lar,er A4!;5! is recommen%e%+

14+ $F#Support enable% or %isable%+ This parameter %etermines 8hether the BSS

supports &F$ function+ The &F$ function is reali


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recommen%e%+

− RS the 8ei,ht of U9 throu,hput on the b interface is a %ynamic )bis

a%Gustment parameter+ The %efault value is 13 an% the recommen%e% value is

3?+

− RR the 8ei,ht of ;9 throu,hput on the b interface is a %ynamic )bis


3?+

− RA the 8ei,ht of number of E&RS =S access reCuests is a %ynamic )bis

a%Gustment parameter+ The %efault value is : an% the recommen%e% value is

1?+

− R! the 8ei,ht of maimum number of ban%8i%th reCuests is a %ynamic )bis


39+

− RB the 8ei,ht of maimum ban%8i%th usa,e is a %ynamic )bis a%Gustment

parameter+ The %efault value is : an% the recommen%e% value is 1?+

− RG %efines the proportion of &RS freCuency carrier+ Its %efault value is 19

an% the recommen%e% value is 9+

− RE %efines the proportion of E;E freCuency carrier+ Its %efault value is 69

an% recommen%e% value is 1?+

It is reCuire% that the sum of these seven parameters ARS RR RA R! RB RG

RE shoul% be 1??+

15+ %ihest co'in scheme of sinalin TBF an% G$RS5E)GE initial co'in

scheme+ >ali% bytes of the si,nalin, bloc@ are very fe8N therefore it is

unnecessary to use hi,h $S to transmit bloc@s+ Usin, lo8er $S to transmit bloc@s

can improve TBF establishment success rate transmission success rate

throu,hput an% other relevant in%icators+ )n% the TBF abnormal failure rate can

also be re%uce%+ It is recommen%e% that the $S of the si,nalin, TBF is not hi,her

than =$S7+ R&S initial $S is set to $S(+ )n% E;E initial $S shoul% be set

accor%in, to the fiel% ra%io environment+ =$S6 or lo8er is recommen%e%+

17+ The EG$RS pac,et channel reuest access proram support parameter shoul%

be set to es if the E;E service is enable%N an% it shoul% be set to No if the

&RS service is enable%+ If t8o.phase access is not compulsory the U9 access

mo%e is %etermine% by the =S+ 0o8ever the fiel% eperience sho8s that 8ith this

function enable% the proportion of one.phase access is increase%+ Because the

one.phase access success rate is hi,her than the t8o.phase access for the

net8or@ that supports E&RS 8ith this function enable% the U9 TBF

establishment success rate can be improve%+



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1"+ 4SFGranularit&+ It is assi,ne% to the =S in the $A#ET 4$LIN ASSIGN!ENT

messa,e in%icatin, the uplin@ bloc@ allocation ,ranularity of the &RS =S from

the net8or@ 8hen the cell employs the me%ia control mo%e of %ynamic allocation+ ?

means that the U9 bloc@ allocation ,ranularity is 1 an% 1 means that the U9 bloc@

allocation ,ranularity is 6+ If the value is small resources can be save% an%

resource allocation can be more fleible+ If this value is set to 8 but there are no

four continuous ,ranularities allocation 8ill fail+ Therefore it is recommen%e% to set

this parameter to ? on site+

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6 4L5)L TBF Establishment Success

Rate

6.1 4L TBF Establishment Success Rate

U9 TBF establishment success rate M *umber of successful U9 TBF

establishments:*umber of U9 TBF establishment attempts

$I U9 TBF establishment success Rate

$I

)efinition

Formula 1

A*umber of &RS U9 si,nalin, TBF establishments K *umber ofE&RS U9 si,nalin, TBF establishments K *umber of &RS U9 %ataTBF establishments K *umber of E&RS U9 %ata TBF establishmentsJ 1!!H:A*umber of &RS U9 TBF establishments in release state K*umber of &RS U9 TBF establishments 8ith eistin, U9 resource K*umber of &RS U9 TBF establishment reCuests A&)$$$0 K *umberof &RS U9 TBF establishment reCuests A$$$0:&$$$0 K *umber ofE&RS U9 TBF establishment reCuests in release state K *umber ofE&RSU9 TBF establishment reCuests 8ith eistin, U9 resource K*umber of E&RS U9 TBF establishment reCuests A&)$$$0 KE&RS U9 TBF establishment reCuests A$$$0:&$$$0

#TE system %i% not count resources allocations an% %ataretransmissions after %elay state into lin@ establishment+ From no8 onthey shoul% be counte% as in other ven%ors such as *S*+

Formula (

A*umber of &RS U9 si,nalin, TBF establishments K *umber ofE&RS U9 si,nalin, TBF establishments K *umber of &RS U9 %ataTBF establishments K *umber of E&RS U9 %ata TBF establishmentsK *umber of &RS U9 TBF resource reallocations %ue to 99$transmission K *umber of E&RS U9 TBF resource reallocations %ueto 99$ transmission K *umber of &RS U9 TBF resource reallocations%ue to ;9 TBF establishment K *umber of E&RS U9 TBF resourcereallocations %ue to ;9 TBF establishment K *umber of &RS U9 TBFresumptions in eten% uplin@ state K *umber of E&RS U9 TBF

resumptions in eten% uplin@ state J 1!!H:A*umber of &RS U9 TBFestablishments in release state K *umber of &RS U9 TBFestablishments 8ith eistin, U9 resource K *umber of &RS U9 TBFestablishment reCuests on &)$$0 K *umber of &RS U9 TBFestablishment reCuests on $$$0:&$$$0 K *umber of E&RS U9TBF establishments in release state K *umber of E&RS U9 TBFestablishments 8ith eistin, U9 resource K *umber of E&RS U9 TBFestablishment reCuests on &)$$0 K *umber of E&RS U9 TBFestablishment reCuests on $$$0:&$$$0 K *umber of &RS U9 TBFresource reallocation reCuests %ue to 99$ transmission K *umber ofE&RS U9 TBF resource reallocation reCuests %ue to 99$transmission K *umber of &RS U9 TBF resource reallocationreCuests %ue to ;9 TBF establishment K *umber of E&RS U9 TBF

#TE $onfi%ential &roprietary ' (!11 #TE $OR&OR)TIO*+ )ll ri,hts reserve%+


15/38


resource reallocation reCuests %ue to ;9 TBF establishment K *umberof &RS U9 TBF resumptions in eten% uplin@ state K *umber ofE&RS U9 TBF resumptions in eten%e% uplin@ state

$IFormula

>7+1

Formula 1

A$?!!!6!!(5 K $?!!!6!!44 K $?!!!6!!(7 K$?!!!6!!46:A$?!!!6!15? K $?!!!6!17! K $?!!!6!171K $?!!!6!17 K $?!!!6!174 K $?!!!6!176 K$?!!!6!175 K $?!!!6!177

Because the resource reallocation an% %ata resen%in, after%elay are not counte% as lin@ establishments in #TEsystem the statistics of the t8o items can be ma%e AOtherven%ors such as *S* ma@es the statistics in this 8ay+

Formula (

A$?!!!6!!(5 K $?!!!6!!44 K $?!!!6!!(7 K$?!!!6!!46 K A$?!!!6!1(6 . $?!!!6!1(5 KA$?!!!6!14( . $?!!!6!144 K A$?!!!6!1(( .$?!!!6!!!1(4 K A$?!!!6!14! . $?!!!6!141 K$?!1!1!!!1 K $?!1!1!!((:A$?!!!6!15? K $?!!!6!17!K $?!!!6!171 K $?!!!6!17 K $?!!!6!174 K$?!!!6!176 K $?!!!6!175 K $?!!!6!177 K $?!!!6!1(6K $?!!!6!!!14( K $?!!!6!!!1(( K $?!!!6!!!14! K$?!1!1!!!1 K $?!1!1!!((

>7+( The same as the above

Notes

Formula ( is recommen%e% because it has been use% in the 0on,@on,$S9 proGect an% its -&I %efinition is consistent 8ith that of othermanufacturers formula+

Enable the one.phase access function 8hich supportsEG$RS@#hannel@Re to improve this -&I+ If the function is notenable% the value of this -&I shoul% be (H lo8er+

This -&I formula is Cuote% from GSM RNO Subject-PS KPI_R1! + Thefiel% en,ineer shoul% pay attention to the up%ate time of this %ocumentan% refer to the latest one+

6.3 )L TBF Establishment Success Rate

;9 TBF establishment success rate M *umber of successful ;9 TBF

establishments:*umber of ;9 TBF establishment attempts

$I ;9 TBF establishment success Rate

$I)efinition

Formula 1

A*umber of &RS ;9 si,nalin, TBF establishments K *umber ofE&RS ;9 si,nalin, TBF establishments K *umber of &RS ;9 %ataTBF establishments K *umber of E&RS ;9 %ata TBF establishmentsJ 1!!H:A*umber of &RS ;9 TBF establishment reCuests beforeT14?( epiration K *umber of &RS ;9 TBF establishments usin, ;9TBF resource K *umber of &RS ;9 TBF establishment reCuests on&)$$0 K *umber of &RS ;9 TBF establishment reCuests on$$$0:&$$$0 K *umber of E&RS ;9 TBF establishment reCuestsbefore T14?( epiration K *umber of E&RS ;9 TBF establishmentsusin, eistin, ;9 TBF resource K *umber of E&RS ;9 TBF

#TE $onfi%ential &roprietary ' (!11 #TE $OR&OR)TIO*+ )ll ri,hts reserve%+ ?


16/38


establishment reCuests on &)$$0 K *umber of E&RS ;9 TBFestablishment reCuests on $$$0:&$$$0

#TE system %i% not count resources allocations an% %ataretransmissions after %elay state into lin@ establishments+ From no8 onthey shoul% be counte% as in other ven%ors such as *S*+

Formula (

A*umber of &RS ;9 si,nalin, TBF establishments K *umber ofE&RS ;9 si,nalin, TBF establishments K *umber of &RS ;9 %ataTBF establishments K *umber of E&RS ;9 %ata TBF establishmentsK *umber of &RS ;9 TBF resource reallocation reCuests %ue to U9TBF establishment K *umber of E&RS ;9 TBF resource reallocationreCuests %ue to U9 TBF establishment K *umber of &RS ;9 TBFresource reallocation reCuests %ue to 99$ transmission K *umber ofE&RS ;9 TBF resource reallocation failures %ue to 99$ transmissionK *umber of &RS ;9 TBF resumptions in %elay state K of E&RS ;9

TBF resumptions in %elay state J 1!!H:A*umber of &RS ;9 TBFestablishment reCuests before T14?( epiration K *umber of &RS ;9TBF establishments usin, ;9 TBF resource K *umber of &RS ;9TBF establishment reCuests on &)$$0 K *umber of &RS ;9 TBFestablishment reCuests on $$$0:&$$$0 K *umber of E&RS ;9TBF establishment reCuests before T14?( epiration K *umber ofE&RS ;9 TBF establishments usin, eistin, ;9 TBF resource K*umber of E&RS ;9 TBF establishment reCuests on &)$$0 K*umber of E&RS ;9 TBF establishment reCuests on $$$0:&$$$0K *umber of &RS ;9 TBF resource reallocation reCuests %ue to U9TBF establishment K *umber of E&RS ;9 TBF resource reallocationreCuests %ue to U9 TBF establishment K *umber of &RS ;9 TBFresource reallocation reCuests %ue to 99$ transmission K *umber of

E&RS ;9 TBF resource reallocation failures %ue to 99$ transmissionK *umber of &RS ;9 TBF resumptions in %elay state K *umber ofE&RS ;9 TBF resumptions in %elay state

In some areas hi,h ;9 success rate is reCuire%+ For eample for somenet8or@s in In%onesia ;9 resource allocation success rate is a%opte%as an in%icator of ;9 TBF success rate+ This formula 8ith the in%icatorof ??H or above is not correct+

Formula 4

1 A*umber of &RS ;9 TBF establishment failures %ue to %atabaseallocation failure K *umber of E&RS ;9 TBF establishment failures%ue to %atabase allocation failure:A*umber of &RS ;9 TBF

establishment reCuests before T14?( epiration K *umber of &RS ;9TBF establishments usin, ;9 TBF resource K *umber of &RS ;9TBF establishment reCuests on &)$$0 K *umber of &RS ;9 TBFestablishment reCuests on $$$0:&$$$0 K *umber of E&RS ;9TBF establishment reCuests before T14?( epiration K *umber ofE&RS ;9 TBF establishments usin, eistin, ;9 TBF resource K*umber of E&RS ;9 TBF establishment reCuests on &)$$0 K*umber of E&RS ;9 TBF establishment reCuests on $$$0:&$$$0

$IFormula

>7+1 Formula 1

A$?!!!6!!!" K $?!!!6!!15 K $?!!!6!!! K$?!!!6!!17:A$?!!!6!161 K $?!!!6!16( K $?!!!6!164K $?!!!6!166 K $?!!!6!165 K $?!!!6!167 K$?!!!6!16" K $?!!!6!16

#TE $onfi%ential &roprietary ' (!11 #TE $OR&OR)TIO*+ )ll ri,hts reserve%+ 1!


17/38


Formula (

A$?!!!6!!!" K $?!!!6!!15 K $?!!!6!!! K$?!!!6!!17 K A$?!!!6!11! . $?!!!6!111 KA$?!!!6!117 . $?!!!6!11" K A$?!!!6!11( .$?!!!6!114 K A$?!!!6!11 . $?!!!6!11? K$?!1!!!!!1 K $?!1!!!!(4:A$?!!!6!161 K $?!!!6!16(K $?!!!6!164 K $?!!!6!166 K $?!!!6!165 K$?!!!6!167 K $?!!!6!16" K $?!!!6!16 K $?!!!6!11!K $?!!!6!117 K $?!!!6!11( K $?!!!6!11 K$?!1!!!!!1 K $?!1!!!!(4

Formula 4

1 . A$?!!!6!1!? K $?!!!6!115:A$?!!!6!161 K$?!!!6!16( K $?!!!6!164 K $?!!!6!166 K $?!!!6!165K $?!!!6!167 K $?!!!6!16" K $?!!!6!16


Notes

Formula ( is recommen%e% because it has been use% in the 0on,@on,$S9 proGect an% its -&I %efinition is consistent 8ith that of othermanufacturers formula+

If the net8or@ reCuires this -&I to be lar,er than ??H Formula ( isrecommen%e% Asee -&I ;efinition

This -&I formula is Cuote% from GSM RNO Subject-PS KPI_R1! + Thefiel% en,ineer shoul% pay attention to the up%ate time of this %ocumentan% refer to the latest one+

6.6 4L G$RS Establishment Success Rate$I U9 &RS establishment success Rate

$I)efinition

This -&I cannot be obtaine%+ See *otes+

$IFormula

>7+1

>7+(

Notes

In the U9 establishment process only after the &ac@et ResourceReCuest messa,e is receive% &RS or E&RS can be %etermine%+Therefore it is impossible to obtain &RS:E&RS establishmentsuccess rate in%epen%ently in the uplin@+

6.8 )L G$RS Establishment Success Rate

$I ;9 &RS establishment success Rate

$I)efinition

A*umber of &RS ;9 si,nalin, TBF establishments K *umber of&RS ;9 %ata TBF establishments J 1!!H:A*umber of &RS ;9 TBFestablishment reCuests before T14?( epiration K *umber of &RS ;9TBF establishments usin, ;9 TBF resource K *umber of &RS ;9TBF establishments usin, ;9 TBF resource K *umber of &RS ;9TBF establishment reCuests on &)$$0

$I

Formula

>7+1 A$?!!!6!!!" K $?!!!6!!!:A$?!!!6!161 K $?!!!6!16(

K $?!!!6!164 K $?!!!6!166



18/38



NotesBecause the U9 &RS establishment rate cannot be counte% thein%epen%ent ;9 &RS TBF establishment success rate is notrecommen%e%+

6.9 4L EG$RS Establishment Success Rate

$I U9 E&RS establishment success Rate

$I)efinition

This -&I cannot be obtaine%+ See *otes+

$IFormula

>7+1

>7+(

Notes

In the U9 establishment process only after the &ac@et Resource

ReCuest messa,e is receive% &RS or E&RS can be %etermine%+Therefore it is impossible to obtain &RS:E&RS establishmentsuccess rate in%epen%ently in the uplin@+

6.: )L EG$RS Establishment Success Rate

$I ;9 E&RS establishment success Rate

$I)efinition

A*umber of E&RS ;9 si,nalin, TBF establishments K *umber ofE&RS ;9 %ata TBF establishments J 1!!H:A*umber of E&RS ;9TBF establishment reCuests before T14?( epiration K *umber ofE&RS ;9 TBF establishments usin, eistin, ;9 TBF resource K*umber of E&RS ;9 TBF establishment reCuests on &)$$0 K*umber of E&RS ;9 TBF establishment reCuests on $$$0:&$$$0

$IFormula

>7+1A$?!!!6!!15 K $?!!!6!!17:A$?!!!6!165 K $?!!!6!167K $?!!!6!16" K $?!!!6!16


NotesBecause the U9 E&RS establishment rate cannot be obtaine%in%epen%ent ;9 E&RS TBF establishment success rate is notrecommen%e%+

#TE $onfi%ential &roprietary ' (!11 #TE $OR&OR)TIO*+ )ll ri,hts reserve%+ 1(


19/38


8 4L5)L TBF Establishment $rocess

8.1 4L TBF Establishment $rocess

8.1.1 ne2$hase 4L TBF Establishment $rocess on ###%

(&ac@et) $0)**E9 RE3UEST

=S

I== )ssi,n:&ac@et Uplin@ )ss )5$0:&)5$0

R)$0:&R)$0

BSS

&ac@et Uplin@ )c@ :*ac@AT99I

&ac@et Uplin@ )c@ :*ac@AT99I

R9$ ;)T) B9O$-A T99I

R9$ ;)T) B9O$-AT99I

R9$ ;)T) B9O$-ADithout T99I

&)$$0

&)$$0

&;T$0

&;T$0

&;T$0

......

1+ )fter the =S sen%s #%ANNEL RE04EST or $A#ET #%ANNEL RE04EST on

the R)$0:&R)$0 at the pre%etermine% time an% for a certain number of times it

8ill leave pac@et i%le mo%e+ If the &B$$0 is confi,ure% the =S 8ill sen%

messa,es on the &R)$0N other8ise on the R)$0+

(+ Dhen the BSS at the net8or@ si%e receives #%ANNEL RE04EST or $A#ET

#%ANNEL RE04EST on the $$0:&$$$0 channel it 8ill sen% I!!E)IATE

ASSIGN!ENT or $A#ET 4$LIN ASS in unac@no8le%,e% mo%e to allocate U9

resources for the =S+

4+ For the one.phase access after the =S receives I!!E)IATE ASSIGN!ENT or

$A#ET 4$LIN ASS the preemptive Gu%,ment mechanism is as follo8s

1+ )fter the =S receives the U9 assi,nment messa,e the first three R9$ %ata

bloc@s sent by the =S must carry T99I+ Dhen the net8or@ receives the first

R9$ %ata bloc@ it 8ill response it 8ith the $A#ET 4$LIN A# messa,e



20/38


an% the receive% T99I must be inclu%e% in the messa,e+ Then the =S 8ill

receive the $A#ET 4$LIN A# messa,e+ If the inclu%e% T99I is i%entical

8ith that of the =S the ra%io resource is allocate% to this =S+ Other8ise the

=S shoul% eit+

(+ Dhen the BBS at the net8or@ si%e receives the first R9$ %ata bloc@ AT99I

correctly the preemptive Gu%,ment of the one.phase access is complete% at

the net8or@ si%e+

8.1.3 T*o2$hase 4L TBF Establishment $rocess on ###%

(&ac@et) $0)**E9 RE3UEST

=S

I== )SSI5*:&ac@et Uplin@ )ss )5$0:&)5$0

R)$0:&R)$0

BSS

&ac@et Uplin@ )ssi,nA8ith T99I

&ac@et Uplin@ )c@ :*ac@

&ac@et Resource ReCuest A8ith T99I

R9$ ;)T) B9O$-

R9$ ;)T) B9O$-

&)$$0

&)$$0

&)$$0

&;T$0

&;T$0

++++++

1+ ;urin, the t8o.phase access the I!! ASSIGN or $A#ET 4$LIN ASS

messa,e 8ill allocate a &)$$0 sin,le bloc@ to the =S+ Dith this sin,le bloc@ the

=S sen%s the $A#ET RES4R#E RE04EST messa,e A8ith T99I to the

net8or@+

(+ )ccor%in, to the information of $A#ET RES4R#E RE04EST the net8or@ 8ill

sen% $A#ET 4$LIN ASSIGN C*ith TLLID to the =S to allocate specific channel

resources+

4+ The preemptive Gu%,ement is as follo8s

Dhen the =S receives the secon% $A#ET 4$LIN ASSIGN it 8ill compare

8hether the T99I inclu%e% in this messa,e is consistent 8ith that inclu%e% in

$A#ET RES4R#E RE0 sent by the =S+ If it is the preemption succee%s+



21/38


8.1.6 4L TBF Establishment $rocess on $A##%

=S

R9$ ;)T) B9O$-&;T$0

BSS

&ac@et Uplin@ )ss i,nment

&ac@et Uplin@ )c@ :*ac@

&ac@et ;o8nlin@ )c@:*ac@

$hannel reCuest

R9$ ;)T) B9O$-

R9$ ;)T) B9O$-

&)$$0

&)$$0

&)$$0

&;T$0

&;T$0

++++++

1+ ;urin, ;9 TBF perio% the =S sen%s $A#ET );NLIN A#5NA# inclu%in,

%escriptive information about the channel reCuest on the &)$$0 to launch the

pac@et access process+

(+ The BSS sen%s $A#ET 4$LIN ASSIGN!ENT or $A#ET TI!ESLT

RE#NFIG4RE on the &)$$0 to allocate resources to the =S+

4+ The =S transfers to the assi,ne% U9 &;$0 an% starts sen%in, R9$ %ata bloc@s

A8ithout T99I+



22/38


8.3 )L TBF Establishment $rocess

8.3.1 )L TBF Establishment $rocess on ###%

=S

I== )SSI5*:&ac@et ;o8nlin@ )ss )5$0:&)5$0

BSS

&ac@et $ontrol )c@no8le%,ement A)B

TI=I*5 );>)*$E

&ac@et &ollin, reCuest ADith TFI

R9$ ;)T) B9O$-

&)$$0

&)$$0

&)$$0

&;T$0

&)$$0

++++++

&ac@et &o8er $trl:Timin, )%vance

1+ If there is a reCuest to sen% 99$ &;U to the =S in pac@et i%le mo%e at the BBS

si%e the ;9 TBF establishment process is tri,,ere%+

(+ The net8or@ sen%s the ;9 assi,nment messa,e $A#ET );NLIN ASS or

I!! ASSIGN on the &)$0 or )$0 bloc@ of the =S+ If the &B$$0 is

confi,ure% the net8or@ 8ill sen% messa,es on the &)$0N other8ise on the

)$0+

4+ The ;9 assi,nment messa,e shoul% inclu%e timin, a%vance+ If the BSS %oes not

have vali% initial timin, a%vance AT) it shoul% sen% $A#ET $LLING

RE04EST to notify the =S to sen% $A#ET #NTRL A#N;LE)GE!ENT

so that it can obtain timin, a%vance+

6+ )fter the =S receives the above messa,e it 8ill sen% four burst pulses $A#ET#NTRL A#+ )n% the BSS uses these four access burst pulses to calculate the

initial timin, a%vance of the =S+

5+ The net8or@ sen%s $A#ET $;ER #NTRL5TI!ING A)(AN#E to provi%e

the =S 8ith T)+ If the assi,nment messa,e contains no T) value before the =S

receives a vali% T) normal burst is not allo8e% to sen% on the U9 lin@ Asuch as the

$A#ET );NLINA#5NA# messa,e+



23/38


8.3.3 )L TBF Establishment $rocess on $A##%

&;T$0

=S

R9$ ;)T) B9O$-

BSS

&ac@et ;o8nlin@ )ssi,nment

Or &ac@et Timeslot Reconfi,ure

R9$ ;)T) B9O$-

&)$$0

&;T$0

++++++

++++++

1+ ;urin, U9 transmission The BSS at the net8or@ si%e sen%s $A#ET );NLINASSIGN!ENT or $A#ET TI!ESLT RE#NFIG4RE throu,h the &)$$0 to

the =S so as to launch ;9 TBF establishment+ If $A#ET TI!ESLT

RE#NFIG4RE is sent this messa,e shoul% inclu%e

);NLIN@TFI@ASSIGN!ENT fiel%+ )n% the =S multi.timeslot limit must be

observe%+

(+ )fter the =S receives the assi,nment messa,e an% after the TBF start time Aif

provi%e% the =S shoul% transfer to the assi,ne% &;$0 to transmit the ;9 %ata+

#TE $onfi%ential &roprietary ' (!11 #TE $OR&OR)TIO*+ )ll ri,hts reserve%+ 1"


24/38


9 n2site ptimi-ation #ases

9.1 A #ase of TBF Establishment Success Rate

Improvement for a Net*or, in #hina C1D

9.1.1 Bac,roun' )escription

#TES &RS optimi


25/38


StartTime

#ompletiontime

Number

of4L

TBFEstablishmentReuest

sC4L

ResourceAvail

ableD

Numberof4L

TBFEstablishmentReuests Con$A##%D

Numb

er ofaile'4L

TBFEstablishme

ntReue

stsCTimeout on$A##

%D

Number of

faile'4LTBF

Establishme

ntReue

stsC)ue

totherFactor s on

$A##% D

Number of LTBF

Establishme

ntReue

stsCon

###%D

Number ofaile'4L

TBFEstablishme

ntReue

stsC)ue

tone2

$hase#ompetitionFailur

e on###%

D

Numberof faile'4L TBF

Establishment

Reuests

CResour ce

Reuest is notReceive

' on###%)urinT*o2

$haseAccessD

Number of

faile'4LTBF

Establishme

ntReue

stsC )ue

totherFactor s on

###%D

(!!.11.17

(!!.11.1"

1??"7!6

7(7??64

4 (117!1155?565

7 1!647?4 115?55

(!!.11.1"

(!!.11.1

1?7"114

7!41"56

1?!(1115("64

11 ?46(?( 11((?1

The above table in%icates that U9 TBF establishment failures cause% by resource

reCuest not receive% on the $$$0 %urin, t8o.phase access account for "H.?H+

Therefore it is crucial to re%uce this @in% of failures+

In or%er to re%uce this @in% of failures an% simplify TBF establishment process to spee%

up TBF establishment the en,ineers %eci%e% to enable one.phase access+ That

reCuires mo%ifyin, the parameter of T*o$haseAccess from es to No+

9.1.6 Effect of $arameter !o'ification

)fter the value of T*o$haseAccess 8as mo%ifie% the U9 TBF establishment success

rate 8as ,reatly improve%+ The follo8in, table sho8s the performance %ata of the 8hole

net8or@ %urin, busy hours at ni,ht after the parameter 8as mo%ifie%+

#TE $onfi%ential &roprietary ' (!11 #TE $OR&OR)TIO*+ )ll ri,hts reserve%+ 1?


26/38


StartTime

#ompletiontime

Number of4L

TBF

Establishme

ntReue

stsC4L

Resource

AvailableD

Number of4L

TBFEstablishme

ntReue

stsCon

$A##%D

Number

of 4LTBF

Establishment

ReuestCon

###%D

Number of

4LSinal

inTBF

Establishme

ntTimes

Number of4L )ata

TBFEstablish

mentsTimes

Number of4L TBF

Establishment Success

Rate CD

(!!.11.1

(!!.11.1?

(6?"(1(

741147

1!"?"4(((644"5?

1?!"(!1 ?+66H

(!!.11.1? (!!.11.(! (64!7""5 7!4466? 1!7"?71 ((!5666 141"7"( ?+6(H

(!!.11.(!

(!!.11.(1

(61557"5

5?5"77"

1!7451"?((!771(7

1!7575? ?+6?H

)ccor%in, to the above table the U9 TBF establishment rate of the 8hole net8or@ after

the net8or@ mo%ification is about ?+6H 8hich is a satisfactory result+

Further observation of the performance %ata %urin, U9 TBF establishment sho8e% that

the number of U9 TBF establishment failures cause% by resource reCuest not receive%

on the $$$0 %urin, t8o.phase access %ecrease% %ramatically+ The follo8in, table

sho8s the performance %ata of the 8hole net8or@ %urin, busy hours at ni,ht+

StartTime

#ompletion

time

Numberof4L


sC4L

ResourceAvailableD

Numberof4L

TBFEstablishmentRe

uests Con$A##%D

Numberof

faile' 4LTBFEstablishmentReuest

sCTimeouton

$A##%D

Number offaile'

4LTBF

Establishme

ntReue

stsC)ue

totherFactor s on

$A##% D

Number of4L

TBFEstablishme

ntReue

stsCon

###%D

Number offaile'

4LTBF

Establishme

ntReue

stsC)ue

tone2

$hase#ompetitionFailur e on

###%D

Numberof faile'4L TBFEstablishment

Reuests

CResour ce


' on###%)urinT*o2

$haseAccessD

Number offaile'

4LTBF

Establishme

ntReue

stsC )ue

totherFactor s on

###%D

(!!.11.1

(!!.11.1?

(6?"(1(

741147

1 (?!671!"?"4(

("5 (1"515 6"716

(!!.11.1?

(!!.11.(!

(64!7""5

7!4466?

( ("4151!7"?71

7(7 (1!64 664?(

(!!. (!!. (615 5?5" ( (47 1!7451 "4 (1!(" 65(!"

#TE $onfi%ential &roprietary ' (!11 #TE $OR&OR)TIO*+ )ll ri,hts reserve%+ (!


27/38


StartTime

#ompletion

time

Number

of4L


sC4L

ResourceAvail

ableD

Numberof4L

TBFEstablishmentReuests Con$A##%D

Number

offaile' 4LTBFEstablishmentReuest

sCTimeouton

$A##%D

Number of

faile'4LTBF

Establishme

ntReue

stsC)ue

totherFactor s on

$A##% D

Number of4L

TBFEstablishme

ntReue

stsCon

###%D

Number offaile'

4L

TBFEstablishme

ntReue

stsC)ue

tone2

$hase#ompetitionFailur

e on###%

D

Numberof faile'4L TBF

Establishment

Reuests

CResour ce


' on###%)urinT*o2

$haseAccessD

Number of

faile'4LTBF

Establishme

ntReue

stsC )ue

totherFactor s on

###%D

11.(! 11.(1 57"5 77" "?

)ccor%in, to the above table the number of U9 TBF establishment failures cause% by

resource reCuest not receive% on the $$$0 %urin, t8o.phase access %ecrease% from

one million to aroun% (1!!!!+ Therefore the parameter mo%ification is Cuite effective+

9.1.8 (erification of the $arameter !o'ification Effect

Test site 1 an ehibition center

The screenshot of the test result is as follo8s+

Test result The en,ineers con%ucte% a D)& lo,in test for the BTS at the ehibition

center an% foun% that the D)& service of the BTS 8as normal an% the one.phase

access function 8as also normal+

#TE $onfi%ential &roprietary ' (!11 #TE $OR&OR)TIO*+ )ll ri,hts reserve%+ (1


28/38


Test site ( Funan &rimary School


Test result The en,ineers con%ucte% a D)& lo,in test for the BTS of Funan &rimary

School an% foun% that the D)& service of this BTS 8as normal an% the one.phase

access function 8as normal too+

Test site 4 Linshi@on, Buil%in,


Test result The en,ineers con%ucte% a D)& lo,in test for the BTS of the Linshi@on,

Buil%in, an% foun% that the D)& service of this BTS 8as normal an% the one.phase

access function 8as normal too+

9.1.9 #hane of ther In'icators After the $arameter !o'ification

The mo%ification of the parameter of T*o$haseAccess only affects TBF establishment+

Therefore 8e only nee% to loo@ at the in%icators that are relevant to the TBF

#TE $onfi%ential &roprietary ' (!11 #TE $OR&OR)TIO*+ )ll ri,hts reserve%+ ((


29/38


establishment process+ The follo8in, table sho8s the relevant performance %ata of the

8hole net8or@ %urin, busy hours at ni,ht+

StartTime

#ompletiontime

Number of$RS4L

TBFSinal

inEstablishme

ntTimes

Number of$RS4L

TBF)ata

Establishme

ntTimes

Number

ofG$RS

4L TBFAbnorm

alReleases )ue

toN61?1verflo

*

Number of

G$RS4L

TBFAbnor

malReleases

)ue toN61?6verfl

o*

Numb

er ofG$RS

4LTBF

Releases

)ue toForce

'Relea

se

Numberof

G$RS4L TBFReleases )ue

toInstanc

eSuspen

sion

Numberof

G$RS4L TBFReleases )ue

to InnerAbnorm

al

(!!.

11.17

(!!.

11.1"

1!"4??

"1

(567

7!1! 4(5("! 16!!41 175 77!!?

(!!.11.1"

(!!.11.1

1151!754

(6((!716

"?(6"6 41646 11(117 16(1 71?!!

(!!.11.1

(!!.11.1?

((644"5?

1?!"(!1

5(7!(5 6(11! 1!167 ?"! 7(1(?1

(!!.11.1?

(!!.11.(!

((!5666

141"7"(

5!7557 6!((( ?51"? 17 5?61?7

(!!.11.(!

(!!.11.(1

((!771(7

1!7575?

5!!11! 6!7515 1!(761 4? 5((?1

The above table in%icates that after the parameter mo%ification the number of

successful &RS U9 si,nalin, TBF establishments improve% a lot+ This is mainly

because the number of establishment failures re%uce% after the parameter mo%ification+

0o8ever because of various factors the number of successful &RS U9 %ata TBF

establishments %i% not chan,e much+ Therefore parameter mo%ification improve% the

stability of the net8or@ performance an% the influence on other in%icators 8as very little+

9.3 A #ase of TBF Establishment Success Rate

Improvement for a Net*or, in #hina C3D


In one #TE net8or@ the &RS U9 TBF establishment success rate 8as only ?(H on

avera,e 8hich 8as very lo8+

9.3.3 #ause Anal&sis an' $roce'ure

Throu,h the analysis of U9 TBF establishment success rate there 8ere a lot of failures

that 8ere cause% by resource reCuest not receive% %urin, the t8o.phase access+



30/38


TimeGranula

rit&

GERANSub2

Net*or,

4L TBFEstablishmentSuccess Rate

Number of

G$RS 4L TBFEstablishmen

t FailuresC)ue to ne2

$hase#ompetition

FailureD

Number ofG$RS 4L TBFEstablishmen

t Failures

C###%5$###%D CResource

Reuest isnot Receive')urin T*o2

$haseAccessD

Number ofG$RS 4L

TBF

establishment

FailuresC###%5$#

##%DCther

ReasonsD

1+1

((6!!.(46!!

Ton,lian,Ton,nan iBS$A1? ?5+7?H ! 76"7 6?5

1+1?

((6!!.

(46!!

Ton,lian,Ton,nan

iBS$A1? ?5+76H ! 7(4( 5641+(!

((6!!.(46!!

Ton,lian,Ton,naniBS$A1? ?5+"7H ! 755 5"

)t present the parameter of T*o$haseAccess is es by %efault+ Because the R9$

layer a%opts ac@no8le%,e% mo%e ,enerally %ata TBF is establishe% in t8o.phase

access mo%e A8hether the =S access bit is not more than bloc@s or more than

bloc@s+ That is 8hether EG$RS $A#ET #%ANNEL RE0 is supporte% the =S 8ill

a%opt t8o.phase access mo%e+ In this mo%e the net8or@ must receive $A#ET

RESR#E RE04EST sent from the =S on a sin,le bloc@+ There is only one chance to

receive this messa,e+ If the U9 B9ER is hi,h or %ata is lost on the )bis interface theBS$ is very li@ely to fail to receive the sin,le bloc@+ Dhen the value of

T*o$haseAccess is set to No the =S is allo8e% to a%opt one.phase access+ In this

case 8hich access mo%e is to be use% is %etermine% by 8hether the =S supports

EG$RS $A#ET #%ANNEL RE0+ Usually the =S a%opts one.phase access for

si,nalin, TBF+ Therefore 8hen one.phase access is allo8e% TBF establishment

success rate can be improve%+

Solution The fiel% en,ineer %isable% the compulsory t8o.phase access mo%e+ That is to

set the T*o$haseAccess parameter on mo%ule 4 an% mo%ule 6 to No+ The follo8in,

table sho8s the %ata comparison before an% after the mo%ification+



31/38


TimeGERAN Sub2

net*or,

4L TBFEstablish

mentSuccess

Rate

Number ofG$RS 4L

TBFEstablish

mentFailuresC)ue to

ne2$hase#ompetition FailureD

Number ofG$RS 4L

TBFEstablishme

nt FailuresC###%5$##

#%DCResourceReuest Is

notReceive'

)urin T*o2$hase

AccessD

Number ofG$RS 4L

TBFestablishm

entFailures

C###%5$###%DCther

ReasonsD

Bef

ore=o%ification

1+1Ton,lian,Ton,nan iBS$A1? ?5+7?H ! 76"7 6?5

1+1? Ton,lian,Ton,nan iBS$A1? ?5+76H ! 7(4( 564

1+(!Ton,lian,Ton,nan iBS$A1? ?5+"7H ! 755 5"

)fter=o%ification

1+(1Ton,lian,Ton,nan iBS$A1? ?7+7H ! 4?61 651

1+((Ton,lian,Ton,nan iBS$A1? ?7+51H 1 66"6 6??

1+(4Ton,lian,Ton,nan iBS$A1? ?7+1H ! 67?5 54!

9.6 A #ase of TBF Establishment Success RateImprovement for an verseas Net*or,


The U9 TBF establishment success rate of one #TEs overseas net8or@ is Gust aroun%

?!H on avera,e %urin, (6 hours 8hich is far from the operators reCuirement A?7H+

9.6.3 #ause Anal&sis an' $roce'ure

The analysis of U9 TBF establishment success rate sho8e% that a lot of U9 TBF

establishment failures 8ere cause% by resource reCuest not receive% on the $$$0

%urin, t8o.phase access+ )t present the parameter of T*o$haseAccess is set to es

by %efault+ Because the R9$ layer a%opts ac@no8le%,e% mo%e ,enerally %ata TBF is

establishe% in t8o.phase access mo%e A8hether the =S access bit is not more than

bloc@s or more than bloc@s+ That is 8hether EG$RS $A#ET #%ANNEL RE0 is

supporte% the =S 8ill a%opt the t8o.phase access mo%e+ In this mo%e the net8or@

must receive $A#ET RESR#E RE04EST sent from the =S on a sin,le bloc@+ There

is only one chance to receive it+ If the U9 B9ER is hi,h or %ata is lost on the )bis



32/38


interface the BS$ is very li@ely to fail to receive the sin,le bloc@+ Dhen the value of

T*o$haseAccess is set to No the =S is allo8e% to a%opt one.phase access mo%e+ In

this case 8hich access mo%e is to be use% is %etermine% by 8hether the =S supports

EG$RS $A#ET #%ANNEL RE0+ Usually the =S a%opts one.phase access for

si,nalin, TBF+ Therefore 8hen one.phase access is allo8e% TBF establishment

success rate can be improve%+

Base% on this analysis the fiel% en,ineer a%Guste% BS$1 of the current net8or@ on

=arch (( to allo8 one.phase access+ The follo8in, table sho8s the %ata collecte%

before an% after the mo%ification+

bect Time

A))IS2

G$RS 4LTBF

Establishment

SuccessRate

A))IS2ne2$hase

#ompetitionFailure

A))IS2ResourceReuest Is

not Receive')urin T*o2

$hase Access

A))IS2Number ofG$RS 4L

TBFEstablish

mentFailures

C###%5$###%DCther

ReasonsD

BS$1 (!1!.!4.14 ?(+!" ( 757! "!"5

BS$1 (!1!.!4.16 ?4+(? ! 5(7?5 "4?6

BS$1 (!1!.!4.15 ?+65 ! 57?( 7765

BS$1 (!1!.!4.17 ?+4? ( ??(? 6

BS$1 (!1!.!4.1" ?!+? ! 6"4 7665

BS$1 (!1!.!4.1 ?!+67 ! 6"4 5(!BS$1 (!1!.!4.1? ?!+"6 ! 1!"?11 7!?

BS$1 (!1!.!4.(! + 4 146!57 76"(

BS$1 (!1!.!4.(1 ?(+45 1 "5!61 7"!5

BS$1 (!1!.!4.(( ?4+( ( 4"11 (6?

BS$1 (!1!.!4.(4 ?7+ 15 417? (!(

BS$1 (!1!.!4.(6 ?7+47 6 4((7 (1(

BS$1 (!1!.!4.(5 ?7+? 6 4475 (6(

BS$1 (!1!.!4.(7 ?7+7? 1 4"6 47?

BS$1 (!1!.!4.(" ?"+(6 1 4"7? 6(1

BS$1 (!1!.!4.( ?"+55 " (67" 61

The operators reCuirement of TBF establishment success rate for this net8or@ is ?7H+

)fter the t8o.phase access mo%e is chan,e% to one.phase access mo%e U9 TBF

establishment success rate is ,reatly increase% to meet this reCuirement+



33/38


#TE $onfi%ential &roprietary ' (!11 #TE $OR&OR)TIO*+ )ll ri,hts reserve%+ ("


34/38


: Relate' !easurement an' #ounters

:.1 $S Basic !easurement

#ounter I) #ounter Name

$?!!!6!1! *umber of &RS ;9 TBF establishment reCuests

$?!!!6!1!?*umber of &RS ;9 TBF establishment failures %ue to %atabaseallocation failure

$?!!!6!11!*umber of &RS ;9 TBF resource reallocation reCuests %ue to U9TBF establishment

$?!!!6!111*umber of &RS ;9 TBF resource reallocation failures %ue to U9TBF establishment

$?!!!6!11(*umber of &RS ;9 TBF resource reallocation reCuests %ue to99$ transmission

$?!!!6!114*umber of &RS ;9 TBF resource reallocation failures %ue to 99$transmission

$?!!!6!116 *umber of ER&S ;9 TBF establishment reCuests

$?!!!6!115*umber of E&RS ;9 TBF establishment failures %ue to %atabaseallocation failure

$?!!!6!117*umber of E&RS ;9 TBF resource reallocation reCuests %ue toU9 TBF establishment

$?!!!6!11"*umber of &RS ;9 TBF resource reallocation failures %ue to U9TBF establishment

$?!!!6!11*umber of E&RS ;9 TBF resource reallocation reCuests %ue to99$ transmission

$?!!!6!11?*umber of E&RS ;9 TBF resource reallocation failures %ue to99$ transmission

$?!!!6!1(! *umber of &RS U9 TBF establishment reCuests

$?!!!6!1(1*umber of &RS U9 TBF establishment failure %ue to %atabaseallocation failure

$?!!!6!1((*umber of &RS U9 TBF resource reallocation reCuests %ue to ;9

TBF establishment

$?!!!6!1(4*umber of &RS U9 TBF resource reallocation failures %ue to ;9TBF establishment

$?!!!6!1(6*umber of &RS U9 TBF resource reallocation reCuests %ue to99$ transmission

$?!!!6!1(5*umber of &RS U9 TBF resource reallocation failure %ue to 99$transmission

$?!!!6!1(7*umber of &RS U9 TBF resource reallocation reCuests forresource reCuest

$?!!!6!1("*umber of &RS U9 TBF resource reallocation failure %ue toresource reCuest

#TE $onfi%ential &roprietary ' (!11 #TE $OR&OR)TIO*+ )ll ri,hts reserve%+ (


35/38



$?!!!6!1( *umber of E&RS U9 TBF establishment reCuests

$?!!!6!1(? *umber of E&RS U9 TBF establishment failure %ue to %atabaseallocation failure

$?!!!6!14!*umber of E&RS U9 TBF resource reallocation reCuests %ue to;9 TBF establishment

$?!!!6!141*umber of E&RS U9 TBF resource reallocation failures %ue to ;9TBF establishment

$?!!!6!14(*umber of E&RS U9 TBF resource reallocation reCuests %ue to99$ transmission

$?!!!6!144*umber of E&RS U9 TBF resource reallocation failure %ue to 99$transmission

$?!!!6!146

*umber of E&RS U9 TBF resource reallocation reCuests for

resource reCuest

$?!!!6!145$?!1(!!!7"*umber of E&RS U9 TBF resource reallocationfailure %ue to resource reCuest

$?!!!6!147 )vera,e number of available &;$0

$?!!!6!14"*umber of forcin, conversation %ynamic from &;$0 to T$0 byBS$

$?!!!6!14 *umber of &;$0 use% by TBF in each cell

$?!!!6!14? =aimum number of use% &;$0

$?!!!6!16! )vera,e number of use% &;$0

$?!!!6!161*umber of &RS ;9 TBF establishment reCuests before T14?(

epiration

$?!!!6!16(*umber of &RS ;9 TBF establishment usin, eistin, ;9 TBFresource

$?!!!6!164 *umber of &RS ;9 TBF establishment reCuests on &)$$0

$?!!!6!166*umber of &RS ;9 TBF establishment reCuests on$$$0:&$$$0

$?!!!6!165*umber of E&RS ;9 TBF establishment reCuests before T14?(epiration

$?!!!6!167 *umber of E&RS ;9 TBF establishment usin, ;9 TBF resource

$?!!!6!16" *umber of E&RS ;9 TBF establishment reCuests on &)$$0

$?!!!6!16 *umber of E&RS ;9 TBF establishment reCuests on$$$0:&$$$0

$?!!!6!16? *umber of &RS ;9 si,nalin, TBF release %ue to *41!5 overflo8

$?!!!6!15! *umber of &RS ;9 si,nalin, TBF release %ue to other reasons+

$?!!!6!151 *umber of &RS ;9 si,nalin, TBF forcin, release by control plane

$?!!!6!15(*umber of &RS ;9 si,nalin, TBF release %ue to instancesuspension+

$?!!!6!154 *umber of &RS ;9 si,nalin, TBF release %ue to inner abnormal+

$?!!!6!156 *umber of E&RS ;9 si,nalin, TBF release %ue to *41!5 overflo8

$?!!!6!155 *umber of E&RS ;9 si,nalin, TBF release %ue to other reasons

#TE $onfi%ential &roprietary ' (!11 #TE $OR&OR)TIO*+ )ll ri,hts reserve%+ (?


36/38



$?!!!6!157*umber of E&RS ;9 si,nalin, TBF forcin, release by control

plane

$?!!!6!15"*umber of E&RS ;9 si,nalin, TBF release %ue to instancesuspension

$?!!!6!15 *umber of E&RS ;9 si,nalin, TBF release %ue to inner abnormal

$?!!!6!15? *umber of &RS U9 TBF establishments in release state

$?!!!6!17! *umber of &RS U9 TBF establishment 8ith eistin, U9 resource

$?!!!6!171 *umber of &RS U9 TBF establishment reCuests on &)$$0

$?!!!6!17( *umber of E&RS U9 %ata TBF establishments on &)$$0

$?!!!6!174 *umber of E&RS U9 TBF establishments in release state

$?!!!6!176 *umber of E&RS U9 TBF establishment 8ith eistin, U9 resource

$?!!!6!175 *umber of E&RS U9 TBF establishment reCuests on &)$$0

$?!!!6!177*umber of E&RS U9 TBF establishment reCuests on$$$0:&$$$0

$?!!!6!17" *umber of %ynamic &;$0 preemption for $S service

$?!!!6!17*umber of &RS U9 TBF establishment reCuests on$$$0:&$$$0

$?!!!6!17? *umber of &RS ;9 %ata TBF establishments on &)$$0

$?!!!6!1"! *umber of E&RS ;9 %ata TBF establishments on &)$$0

$?!!!6!1"1 *umber of &RS U9 %ata TBF establishments on &)$$0

:.3 4sae of $S Resources


$?!1!6!!!1 =aimum number of )bis TS use%

$?!1!6!!!( )vera,e number of )bis TS use%

$?!1!6!!!6 )vera,e number of unavailable &;$0

$?!1!6!!!5 *umber of available static &;$0

$?!1!6!!!7 *umber of unavailable static &;$0

$?!1!6!!!? Time of ;9 &;$0 con,estion

$?!1!6!!1! Time of U9 &;$0 con,estion

$?!1!6!!11 Time of &;$0 use% at least one U9:;9 TBF eists

$?!1!6!!1( Time of &;$0 use% at least one U9:;9 E&RS TBF eists

$?!1!6!!14 Time of &;$0 use% at least one ;9 TBF eists

$?!1!6!!16 Time of &;$0 use% at least one U9 TBF eists

#TE $onfi%ential &roprietary ' (!11 #TE $OR&OR)TIO*+ )ll ri,hts reserve%+ 4!


37/38


:.6 4L5)L G$RS5E)GE )ata TBF


$?!11?!!!( *umber of &RS U9 TBF establishment reCuests on $$$0

$?!11?!!!4 *umber of E&RS U9 TBF establishment reCuests on $$$0

$?!11?!!!6 *umber of &RS U9 TBF establishment reCuests on &$$$0

$?!11?!!!5 *umber of E&RS U9 TBF establishment reCuests on &$$$0

$?!11?!!!7 *umber of &RS U9 TBF establishment reCuests on &)$$0

$?!11?!!15*umber of &RS U9 TBF establishment failure %ue to )biscon,estion

$?!11?!!17*umber of &RS U9 TBF establishment failure %ue to RRcon,estion

$?!11?!!1"*umber of &RS U9 TBF establishment failure %ue to U&&B.;S&channel con,estion

$?!11?!!1 *umber of &RS U9 TBF establishment channel allocate success

$?!1(!!!!( *umber of &RS U9 TBF establishment reCuests on $$$0

$?!1(!!!!4 *umber of E&RS U9 TBF establishment reCuests on $$$0

$?!1(!!!!6 *umber of &RS U9 TBF establishment reCuests on &$$$0

$?!1(!!!!5 *umber of E&RS U9 TBF establishment reCuests on &$$$0

$?!1(!!!!7 *umber of &RS U9 TBF establishment reCuests on &)$$0

$?!1(!!!15*umber of E&RS U9 TBF establishment failure %ue to )biscon,estion

$?!1(!!!17*umber of E&RS U9 TBF establishment failure %ue to RRcon,estion

$?!1(!!!1"*umber of E&RS U9 TBF establishment failure %ue to U&&B.;S& channel con,estion

$?!1(!!!1*umber of E&RS U9 TBF establishment channel allocatesuccess

$?!11"!!!(*umber of &RS ;9 TBF establishment reCuests on$$$0:&$$$0

$?!11"!!!4 *umber of &RS ;9 TBF establishment reCuests on &)$$0

$?!11"!!!6 *umber of &RS ;9 TBF establishment failure %ue to $&U

$?!11"!!!5*umber of &RS ;9 TBF establishment failure %ue to not support;T=

$?!11"!!!" *umber of &RS ;9 TBF establishment failure %ue to )biscon,estion

$?!11"!!!*umber of &RS ;9 TBF establishment failure %ue to RRcon,estion

$?!11"!!!?*umber of &RS ;9 TBF establishment failure %ue to U&&B.;S&channel con,estion

$?!11"!!1! *umber of &RS ;9 TBF establishment channel allocate success

$?!11!!!(*umber of E&RS ;9 TBF establishment reCuests on$$$0:&$$$0

$?!11!!!4 *umber of E&RS ;9 TBF establishment reCuests on &)$$0

$?!11!!!6 *umber of E&RS ;9 TBF establishment failures %ue to $&U



38/38



$?!11!!!5*umber of E&RS ;9 TBF establishment failures %ue to not

support ;T=

$?!11!!!"*umber of E&RS ;9 TBF establishment failure %ue to )biscon,estion

$?!11!!!*umber of E&RS ;9 TBF establishment failure %ue to RRcon,estion

$?!11!!!?*umber of E&RS ;9 TBF establishment failure %ue to U&&B.;S& channel con,estion

$?!11!!1!*umber of E&RS ;9 TBF establishment channel allocatesuccess

Documents

Improvement of TBF Establishment Success Rate