10 OWJ200203 WCDMA Access Problems Analysis ISSUE1.0

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    HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

    www.huawei.c!

    Internal

    OWJ200203 WCDMA

     Access Problems Analysis

    ISSUE 1.0

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     Access is associae! "i# #e call se$%

    s$ccess rae o& #e ne"or'. (#is )PI

    can be o%imi*e! by means o& +Call

    se$% es, an! #e conse-$en ro$ble

    s#ooing base! on access &ail$re

    analysis.

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     U%on com%leion o& #is co$rse/ yo$

    "ill be able o

     e &amiliar "i# #e access

    %roce!$re in UM(S

     Do analysis on access %roblems

    in!e%en!enly

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    HUAWEI TECHNOLOGIES CO., LTD. Page All rights reserved

    Chapter 1 Analysis Flow of Access Failure

    Chapter 1 Analysis Flow of Access Failure

    Chapter 2 The Adjust Methods for Access FailureChapter 2 The Adjust Methods for Access Failure

    Chapter 3 Typical access failure casesChapter 3 Typical access failure cases

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    Chapter 1 Analysis Flow of Access Failure

    Chapter 1 Analysis Flow of Access Failure

    Section 1 The definitions about Access FailureSection 1 The definitions about Access Failure

    Section 2 The drive test data analysis flowSection 2 The drive test data analysis flow

    Section 3 The call statistic data analysis flowSection 3 The call statistic data analysis flow

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    (#e !e&iniions o& access &ail$re

     I "ill be consi!ere! as access &ail$re i& any &ollo"ing con!iions

    sais&ie! a&er +55C connecion re-$es, iniiale! by UE

     5ecei6e +55C Connecion 5e7ec, message;

     UE ransmis or recei6es +55C Connecion 5elease,

    message a&er recei6ing +55C Connecion se$%,

     UE recei6es any CC8 message in #e call se$% %rocess

     (imer e9%ire!/ "#ic# means UE !oes no recei6e +55C

    Connecion se$%, in 3 secon!s a&er +55C connecion

    re-$es, is ransmie!.

     Access failure denitions Access failure denitions

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    (#e !e&iniions o& access &ail$re

     5an!om access %roce!$re &ail$re: UE !oes no ransmi

    ,55C Connecion 5e-$es, message

     +55C Connecion Se$%, message is no recei6e! by UE

    UE !oes no recei6e ,55C connecion se$%, message a&er+55C connecion re-$es, message is ransmie!.

     +55C Connecion Se$% Com%lee, message is no ransmie!

    by UE

     UE recei6es +55C Connecion 5e7ec, message

     UE !oes no recei6e meas$remen conrol message a&er

    ransmiing +55C Connecion Se$% Com%lee, message

     UE !oes no ransmi +CM ser6ice re-$es, message a&er

    meas$remen conrol message is recei6e!.

     Access failure denitions Access failure denitions

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    (#e !e&iniions o& access &ail$re

     UE recei6es +Ser6ice 5e-$es 5e7ec, message

     UE !oes no recei6e ,Call Procee!ing, message a&er

    ransmiing +CM ser6ice re-$es, message

     UE !oes no recei6e +5 Se$%, message a&er recei6ing +Call

    %rocee!ing, message

     UE !oes no ransmi +5 se$% com%lee, message a&er

    recei6ing +5 se$%, message

    UE !oes no recei6e +Aler or Connec, a&er ransmiing +5 se$% , message

     UE !oes no ransmi +Connec Ac'no"le!ge, message a&er

    recei6ing +Aler or connec, message

     Access failure denitions Access failure denitions

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    (#e !ri6e es !aa analysis &lo"

    Sub-ows about DT data analysisSub-ows about DT data analysis

     Data analysis flow

     Paging %roblems analysis &lo"

     55C connecion re-$es %roblems analysis &lo"

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    (#e !ri6e es !aa analysis &lo"

     N

    Y

    Recei

    ved

     paging

     N

    Y

    Y

     N

     N

    RRC

    connection

    setup

    failure?

    Call Fail?

    Paging

     problems

    RRC setup problems

    Analysis drive test data 

    Calling

    failure?

     N

    Y

    Data analysis owData analysis ow

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     N

     N

     N

    Y

    Y

    Y

     N

    Is ciphering

    or

    authenticatio

    n failure?

    RAB setup

    failure?

    ue to

    handover 

    Ciphering or 

    authentication

     problems

    RAB or RB setup problems

    Refer to call drop

    due to handover 

    Abnormal problems

    Data analysis owData analysis ow (#e !ri6e es !aa analysis &lo"

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    (#e !ri6e es !aa analysis &lo"

    Sub-ows about DT data analysisSub-ows about DT data analysis

     Daa analysis &lo"

     a!in! proble"s analysis flow 

     55C connecion re-$es %roblems analysis &lo"

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    (#e !ri6e es !aa analysis &lo"

     Paging %roblems

      A&er &inis#ing 5A assignmen an! CC se$%/ UE recei6e!

    +Disconnec, message &rom C= insea! o& Alering message

     (#e ca$ses o& %aging %roblem #a6e &ollo"ing y%es

     5=C !oes no ransmi %aging message

     (oo lo"er %o"er allocae! &or P5AC8 or PIC8

     Cell reselecion %roblems

     ec.

    Paging problems analysis owPaging problems analysis ow

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    (#e !ri6e es !aa analysis &lo"

    Paging problems analysis owPaging problems analysis ow

    Y

     N

     N

     N

    Y

      Paging problem

    RNC

    transmit

     page?

    Po!er

    too lo! ?

    Cell

    reselection

     problem ?

    Y

    Y

     N

    "#uipment abnormal

     problem

    Ad$ust po!er

    according to

    coverage

    %ptimi&e cell  reselect parameters

    Abnormal

     problem

    '"

    receive

     page

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    (#e !ri6e es !aa analysis &lo"

     5=C !oes no ransmi %aging message

     5=C #as recei6e! #e %aging message b$ !oes no ransmi %aging

    message #ro$g# U$ iner&ace. (#e reasons co$l! be

    > Ca%aciy o& %aging c#annel is no eno$g#

    > Abnormal %roblem co$l! #a%%en in e-$i%men.

     Po"er allocaion &or P5AC8 or PIC8 are oo lo"

     UE !oes no recei6e %aging message i& 5=C #as ransmie!.

    > (#e iner&erence is oo #ig# com%arai6ely/ "#ic# res$l in #e %oor

    recei6ing signal -$aliy o& P5AC8 or PIC8 i& Ec?Io o& PCPIC8. In

    #is case/ #ig#er %o"er can be allocae! o #ese "o c#annels

    > I co$l! also be #e ba! co6erage i& Ec?Io o& PCPIC8 is oo %oor 

    Paging pro