3G Signaling Trace and Analysis
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Transcript of 3G Signaling Trace and Analysis
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HUAWEI TECHNOLOGIES CO., LTD. 2014-02-21
www.huawei.co
m
24thSEP 2008
UMTS Signaling Trace
and Analysis
Internal
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Contents
1. Trace operation
2. Trace Analysis
3. Trace Analysis Case
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1. Trace operation Standard Trace
Purpose:Analyze the call procedure failure cause by monitoring interworing of the signaling on each
standard interface! interworing of the signaling on the user plane! and uplin and downlin data" #n
combination with a dri$e test! this tas helps to locate problems or deal with complaints from %#P
subscribers"
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&E can be traced by
identify of #'S#!
'S#S()! #'E#! *'S# or
P+*'S#"
&sers can trace
signaling messages of
the &E on #&,! #&-! #&
and && interfaces or ona specified interface"
1. Trace operation Standard Trace
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1. Trace operation Standard Trace
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1. Trace operation Standard Trace
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1. Trace operation Standard Trace
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1. Trace operation Standard Trace
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1. Trace operation Standard Trace
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1. Trace operation Deug TraceDeug Mode. indicates a
maintenance mode used for
tracing communication
messages between &nits of the
,)C"
*racing tass configured on
/ther! /ther! and -ind tab
pages tae effect only when
(ebug 'ode is selected"
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1. Trace operation Deug Trace
Enable statistics on pacets recei$ed and sent at layer 2 to be reported to the 1'*"
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1. Trace operation Deug TraceSelecting it enables
the ,A) to send the
&E pacets"
Purpose. *his function helps users to determine whether data disconnection eists between a ser$er and
the ,)C or a low rate on the ser$er side causes the low &E rate"
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1. Trace operation Cell TraceC!"" Trace: *his section describes how to trace cell
messages" *he &E statistics can be displayed in the
tracing result if re3uired" *he tracing results of the cell
messages pro$ide reference for troubleshooting
common channel faults when the access success rate
is low or zero in the cell"
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1. Trace operation Cell Trace
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1. Trace operation Cell TraceI#S Trace: *his section describes how to trace a
number of calls that meet the sampling criteria within a
specified range of cells" hen creating the tas! you
can specify the number of calls to be traced and
specify messages to be traced by selecting the e$ent
type"
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1. Trace operation Cell Trace
Caution 1. *he #/S tracing tas in$ol$es a large amount of trace information! which affects the system
operation" *herefore! the maimum number of simultaneously traced calls set in the Ma$ calls
si%ultaneously tracedarea in the I#Sdialog bo should not be too high" #n addition! you are ad$isednot to trace all e$ents at a time" 5urthermore! you should minimize the fre3uencies of performing this tas
and the number of tass performed simultaneously"
Caution 2. %#P #'S#. ,un the 6A(( &%#P#'S#7 command to add the %#P #'S#"
Caution 3. *his parameter is $alid only when the #'E# 3uery function is enabled on the C) or ,)C side"
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1. Trace operation Cell Trace
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1. Trace operation Trace #n M2&&&
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1. Trace operation Trace #n M2&&&
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1. Trace operation Trace 'e(ie)
Met*od 1. (uring *race! ou can $iew the message at same time"
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1. Trace operation Trace 'e(ie)
Met*od 2. After *race! use 5'A tool open the trace file" 9Suggested:
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1. Trace operation Trace 'e(ie)
Met*od 3. Also can $iew or re$iew *race message on '2000" 9)ot suggested:
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1. Trace operation Trace 'e(ie)
Met*od 3. Also can import trace file to '2000! then re$iew it"
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Contents
1. Trace operation
2. Trace Analysis
3. Trace Analysis Case
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2. Trace Analysis +asic Concept
*ypical
,et)or-
Topology
AndInterace
',S
',C
',S
',C
Core ,et)or-
,ode + ,ode + ,ode + ,ode +
IU IU
Iur
Iu IuIu Iu
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2. Trace Analysis +asic ConceptInterace protocol application part
)-AP 9)ode - Application Part: is the signaling protocol responsible for the control of the )ode - by the
,)C"
,)SAP 9,adio )etwor Subsystem Application Part: is a ;
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2. Trace Analysis +asic Concept
'A+
'+
'",ode+
',C C,U!
UT'A,
'A+ *he ser$ice that the access stratum pro$ides to the non+access stratum for transfer
of user data between &ser E3uipment and C)
'+ *he ser$ice pro$ided by the layer2 for transfer of user data between &serE3uipment and Ser$ing ,)C
'"A =radio lin= is a logical association between single &ser E3uipment and a single
&*,A) access point" #ts physical realization comprises one or more radio bearer
transmissions
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2. Trace Analysis A CS call procedure
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2 T A l i A CS ll d
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2. Trace Analysis A CS call procedure
Call ,elease
,,C ,elease
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Contents
1. Trace operation
2. Trace Analysis
3. Trace Analysis Case
3 T A l i C /IP l i
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3. Trace Analysis Case /IP co%plain
3 T A l i C C ll T
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3. Trace Analysis Case Cell Trace
3 T A l i C " t , t - I
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3. Trace Analysis Case "ocate ,et)or- Issue
#ssue ?? ,)C2;;!2;@ PS #,A*/ low S,
3 T A l i C " t , t - I
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3. Trace Analysis Case "ocate ,et)or- Issue5rom the counter! we got the main reason. %S"#,A*/"5ail/utPS"&E
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3. Trace Analysis Case "ocate ,et)or- Issue
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