Call Trace User Guide V3.0

Call Trace User Guide Document number: UMT/IRC/APP/022962 Document issue: 03.00 / EN Document status: Standard Date: 28/Jan/2009

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Call Trace User Guide

UMT/IRC/APP/022962 03.00 / EN Page 3/3

PUBLICATION HISTORY

28/01/2009 Issue 3.0 EN, Standard

Update for OAM 6.0

Increase of maximum Number of CTb Sessions

Tracing session exclusion removal

Additional periodic UE Measurements

Introduction of call failure trace as part of CTg

Addition of EcNo Values of detected cells in CTn Records

10/01/2008 Issue 2.0 EN, Standard

Update for OAM 5.2

27/07/2007 Issue 1.0 EN, preliminary

Creation



CONTENTS

1. INTRODUCTION............................................................................................................................6

1.1 OBJECT ......................................................................................................................................6

1.2 SCOPE OF THIS DOCUMENT ..........................................................................................................6

1.3 AUDIENCE FOR THIS DOCUMENT ...................................................................................................6

2 RELATED DOCUMENTS ..............................................................................................................7

2.1 APPLICABLE DOCUMENTS.............................................................................................................7

2.2 REFERENCE DOCUMENTS.............................................................................................................7

3 OVERVIEW ....................................................................................................................................8

3.1 CORE NETWORK INVOKED CALL TRACE (CTA) ...............................................................................9 3.1.1 Description ......................................................................................................................9 3.1.2 Activation / Calls selection ..............................................................................................9 3.1.3 Start/Stop tracing ............................................................................................................9 3.1.4 Traced information ........................................................................................................10

3.2 ACCESS INVOKED CALL TRACE (CTB) .........................................................................................10 3.2.1 Description ....................................................................................................................10 3.2.2 Activation/Calls selection ..............................................................................................10 3.2.3 Start/Stop tracing ..........................................................................................................10 3.2.4 Traced information ........................................................................................................12

3.3 GEOGRAPHICAL CALL TRACE (CTG)............................................................................................12 3.3.1 Description ....................................................................................................................12 3.3.2 Activation/Calls selection ..............................................................................................12 3.3.3 Start/Stop tracing ..........................................................................................................12 3.3.4 Traced information ........................................................................................................13

3.4 OBJECT TRACE (OT) .................................................................................................................13 3.4.1 Description ....................................................................................................................13 3.4.2 Activation/Calls selection ..............................................................................................13 3.4.3 Start/Stop tracing ..........................................................................................................14 3.4.4 Traced information ........................................................................................................14

3.5 CALL TRACE NEIGHBORING (CTN) ..............................................................................................14 3.5.1 Description ....................................................................................................................14 3.5.2 Activation/Calls selection ..............................................................................................14 3.5.3 Start/Stop tracing ..........................................................................................................15 3.5.4 Traced information ........................................................................................................15

4 FUNCTIONAL DESCRIPTION ....................................................................................................16

4.1 RNC PERFORMANCES ...............................................................................................................16 4.1.1 CTa performances ........................................................................................................16 4.1.2 CTb performances ........................................................................................................16 4.1.3 CTg performances ........................................................................................................16 4.1.4 CTn performances ........................................................................................................17 4.1.5 OTCell performances ....................................................................................................17 4.1.6 OTIu-CS performances .................................................................................................18 4.1.7 OTIu-PS performances .................................................................................................18



4.1.8 OTIuR performances.....................................................................................................18 4.1.9 OTIu-BC performances .................................................................................................18 4.1.10 OVERLOAD MANAGEMENT ...........................................................................................18

5 CALL TRACE ACTIVATION/DEACTIVATION ...........................................................................20

5.1 CALL TRACE WIZARD .................................................................................................................20 5.1.1 Launching CallTrace wizard..........................................................................................20

5.2 HOW TO CREATE AN ACCESS SESSION (CTB) ...............................................................................22 5.2.1 Creating one or more Access sessions on one RNC ...................................................22 5.2.2 Creating an access session multiple RNCs ..................................................................30

5.3 HOW TO CREATE A GEOGRAPHICAL SESSION ...............................................................................33

5.4 HOW TO CREATE A CELL SESSION ...............................................................................................37

5.5 HOW TO CREATE AN OBJECT SESSION .....................................................................................38

5.6 HOW TO CREATE A CTN SESSION...............................................................................................39

5.7 HOW TO DELETE A SESSION .......................................................................................................41

6 CALL TRACE TEMPLATE MANAGEMENT ..............................................................................46

6.1 CREATE A TRACE SESSION TEMPLATE........................................................................................47

6.2 HOW TO DELETE A TRACE SESSION TEMPLATE.............................................................................49

7 CALL TRACE POST-PROCESSING TOOLS.............................................................................50

7.1 CALL TRACE FILES COLLECTION .................................................................................................50

7.2 POST-PROCESSING TOOLS ........................................................................................................51 RFO..............................................................................................................................................51 WQA.............................................................................................................................................51

8 ABBREVIATIONS AND DEFINITIONS.......................................................................................53

8.1 ABREVIATIONS ..........................................................................................................................53

9 ANNEX.........................................................................................................................................54

9.1 CN FUNCTIONS AND SUB-FUNCTIONS TRACEABLE PER SESSION TYPE ........................................54

9.2 IN FUNCTIONS AND SUB-FUNCTIONS TRACEABLE PER SESSION TYPE..........................................58

9.3 TEMPLATES AND THEIR PRE-DEFINED LIST OF RECORD TYPES AND ASSOCIATED MODES ................59



1. INTRODUCTION

1.1 OBJECT The object of this document is to describe and explain the method to launch the Call Trace from the WMS Configuration Wizard.

1.2 SCOPE OF THIS DOCUMENT The scope of this document is UA6.0 / OAM06.0 .

1.3 AUDIENCE FOR THIS DOCUMENT This document is meant for Engineering teams, Product teams



2 RELATED DOCUMENTS

2.1 APPLICABLE DOCUMENTS [A1] Mobility Optimization Guidelines

2.2 REFERENCE DOCUMENTS [R1] 411-8111-534 06.08 UMTS Access Network Performance Management

[R2] UMT/SYS/DD/000077 UTRAN Call Trace Specification

[R3] UMT/RNS/DD/0006 SIE RNC Tracing Data Format

[R4] UMT/OMC/DD/020726 WQA Post-Processing for UTRAN Neighbouring Tuning

[R5] NN-20500-128 WQA User Guide (Ctn part)

[R6] UMTS/HSxPA RF Optimizer Feature Requirements Specification for UTRAN 4.2 5.0

[R7] NN-20500-033 UMTS Access Network Performance Management



3 OVERVIEW Call Trace is a valuable feature that enables users to track a specific call and analyze its behaviour over time. All protocol messages and RF measurements relative to the call will be stored, correlated, and analyzed.

Call Trace is the whole of the following types of Call Trace sessions:

Core Network Invoked Call Trace, usually referred to as CTa

Access Invoked Call Trace, usually referred to as CTb

Geographic Call Trace, usually referred to as CTg

Neighboring Call Trace, usually referred to as CTn

Object Trace on the cell object, usually referred to as OTCell Object Trace on IuCs object, usually referred to as OTIuCs Object Trace on IuPs object, usually referred to as OTIuPs Object Trace on IuR object, usually referred to as OTIuR Object Trace on IuBC object, usually referred to as OTIuBC



3.1 CORE NETWORK INVOKED CALL TRACE (CTA) Used to trace one or several UE calls.

UEs selection based the IMSI or the IMEI.

Activation on Core Network.

Neither RRC dedicated measurements nor NBAP dedicated measurements are traced.

3.1.1 DESCRIPTION This type of session allows tracing:

one or several UE calls selected by the Core Network using either their IMSI or IMEI.

one or several UE emergency calls

and one or several CallAbnormalityTraceDetectedCellInfo

3.1.2 ACTIVATION / CALLS SELECTION A CTa session is permanently activated by an OMC with each RNC it controls. No user action is needed for this at the OAM level; nevertheless the user has to access the Core Network to enter the identifier (IMSI or IMEI) of the UE(s) that needs to be traced.

3.1.3 START/STOP TRACING The RNC starts tracing a UE call when it receives a RANAP CN INVOKE TRACE message on the Iu SCCP connection dedicated to the UE.

A call is traced by a RNC:

as long as the considered RNC is the SRNS of the UE,

up to the reception of a RANAP CN DEACTIVATE TRACE message on the Iu SCCP connection dedicated to the UE (see remark below),

as long as the session is activated and exists.

Remark: If Call Trace is activated for a same UE by both Core Network domains, then the first received RANAP CN DEACTIVATE TRACE message deactivates any CTa activity related to the UE.

Regarding Emergency calls, any RRC connection request received in the RNC with the cause Emergency Call will be traced by the RNC as a CTa session, without waiting the Core Network trigger: a UE emergency call is systematically traced in a RNS even if a RANAP CN INVOKE TRACE message is not received.

Tracing for this RRC connection will end when the RRC connection is released by the RNC



3.1.4 TRACED INFORMATION It has to be noticed that only 3GPP R5 format is supported for these messages.

To prevent CTa from capturing too much trace data, the RRC dedicated measurements and NBAP dedicated measurements are not traced.

See Annex 9.1 & 9.2

3.2 ACCESS INVOKED CALL TRACE (CTB) Used to trace the calls related to only one UE. Possible to trace several UEs

by activating several CTb sessions.

UEs selection is based: on the IMSI or TMSI or P-TMSI or IMEI.

Activation at the OAM.

3.2.1 DESCRIPTION A Call Trace B session provides data related to all calls initiated for a specified UE during the session activation.

There is one and only one UE traced in a CTb session.

Therefore if n mobiles are to be traced simultaneously, then n sessions are created (see Performances for details on the maximum number of CTb sessions that could activated).

3.2.2 ACTIVATION/CALLS SELECTION The UE identity specified at the OMC-R when creating a CTb session may be one of all choices of the Initial UE identity IE supported by the RRC protocol listed below:

an IMSI

a TMSI

a P-TMSI

an IMEI

3.2.3 START/STOP TRACING A call is traced by CTb as soon as the required UE identity is checked during a call establishment.

The UE identification can occur on the receipt of one of the following signaling messages:

the RRC message RRC CONNECTION REQUEST in which all four Initial UE identities are possible

the RANAP message COMMON ID which supports only the IMSI



the RANAP message "UTRAN Relocation Request" which supports only the IMSI

As soon as a positive check of the UE Id is completed, subsequent messages or events related to the call may be recorded.

The RNC traces the UE call as long as:

the considered RNC is the SRNS of the UE,

the session is activated and exists.

Since most of the time, the first message of a call that carries the IMSI is the RANAP COMMON ID, when a CTb session is activated with an IMSI, every messages/events received/sent before the RANAP COMMON ID can not be traced.

In order to be able to record all the messages/events including the ones that occurred before the RANAP COMMON ID the Call Trace initial UE identity learning feature has been implemented.

For this feature the RNC memorizes every IMSI and associated TMSI (or P-TMSI) and is then able start logging the data related to a specific UE as soon as it has positively checked its TMSI.

In UA6.0, it is possible to configure UEs to report periodically the following measurements in the call trace:

Intra-frequency measurement ( DL RSCP, DL EcNo)

Quality measurement (DL BLER)

UE internal measurement (UE Transmitted power, UE Rx-Tx time difference)

In order to get these measurements:

A new object RrcDedicatedMeasConfigForCallTrace has been created under radioAccessService with the following parameters:

o qualityTypeMeasurementReportingRequired: set to TRUE

o intraFreqTypeMeasurementReportingRequired: set to TRUE

o ueInternalTypeMeasurementReportingRequired: set to TRUE

o reportingInterval: set to a valid value

The applied template must contain the following subfunctions:

o RRCDedicatedMeasurementCallTrace

o RRCDedicatedMeasurementReportAsn1

o RRCDedicatedMeasurementReportDecoded

Administrator

AdministratorUA 06,UA 07



These three subfunctions have been added in the following predefined templates: standardTroubleShooting and heavyTroubleShooting.

3.2.4 TRACED INFORMATION See Annex 9.1 and 9.2

3.3 GEOGRAPHICAL CALL TRACE (CTG) Used to trace calls established within a certain geographical area (one,

several or all the cells of a RNC). Calls are traced even if moving outside the defined area.

Calls to be traced can be filtered according to their RRC establishment cause.

The RNC is able to trace up to N calls per TMU (see Performances). No UE identity is required.


3.3.1 DESCRIPTION A Geographic Call Trace (CTg) session allows tracing calls established within a geographical area.

Once established and traced, the calls may be traced even if the related UE move into areas which do not belong to the defined geographical area.

3.3.2 ACTIVATION/CALLS SELECTION When creating a CTg session, the user has to specify:

A geographic area; the geographic area may be a cell, a set of cells or all the cells in the RNS.

The types of calls that will be traced within the session (based on the RRC establishment cause).

Call Failure Trace is introduced in UA6.0 as part of CTg trace. It will provide a call drop snapshot containing a set of information that helps to understand the drop context. To have this drop snapshot, UE call failure trace function should be added to the template.

3.3.3 START/STOP TRACING Calls may be traced within a CTg session as soon as the trace session is activated and exists.

Administrator

Administrator



The RNC starts tracing a call when:

The call has been established on a cell belonging to the defined area,

The call has been established with one of the selected RRC established causes,

The RNC currently traces less than N calls on the TMU that carries the cell on which the call has been established.

The call is then traced as long as:

The RNC remains as the SRNC of related call.

The session is active.

In UA6.0, it is possible to configure UEs to report periodically the following measurements in the call trace as described for CTb session. Please, refer to chapter 3.2.3.


3.4 OBJECT TRACE (OT)

Used to trace events related network elements or interfaces and not to calls.

Call flows can not be rebuilt using Object Trace data. Activation at the OAM.

3.4.1 DESCRIPTION Object Trace sessions are used to provide Trace data related to a network elements (cell/RNC) or network interfaces. Events are traced because they are attached to a given cell or interface and not because they are attached to a call.

3.4.2 ACTIVATION/CALLS SELECTION Depending on the OT session type, the session can be activated:

On a NE or a list of NEs

On a network interface or a list of network interfaces.



3.4.3 START/STOP TRACING Events may be traced within an OT session as soon as the trace session is activated and exists.

The events are traced on the specific NE or interface as long as the session remains active


3.5 CALL TRACE NEIGHBORING (CTN)

Used to trace events related to calls mobility

Events related to traced calls are only logged when the mobile is inside the defined area.

Calls to be traced can be filtered according to their RRC establishment cause.

The RNC is able to trace up to N calls per TMU (see Performances). No UE identity is required.


3.5.1 DESCRIPTION Neighboring Call Trace (CTn) is used to monitor and optimize neighboring relations by tracing information related to calls mobility. The RNC logs events related to a traced call only when the call is inside the configured area (when the call leaves the area the RNC stops tracing, and when the call comes back into the configured area, the RNC resumes the tracing).

3.5.2 ACTIVATION/CALLS SELECTION When creating a CTn session, the user has to specify:

A geographic area; the geographic area may be a cell, a set of cells or all the cells in the RNS.

The types of calls that will be traced within the session (based on the RRC establishment cause).



3.5.3 START/STOP TRACING Calls may be traced within a CTn session as soon as the trace session is activated and exists.

The RNC starts tracing a call when:

The call has been established on a cell belonging to the defined area,

The call has been established with one of the selected RRC established causes,

The RNC currently traces less than N calls on the TMU that carries the cell on which the call has been established.

The call is then traced as long as:

The RNC remains as the SRNC of related call.

The session is active.




4 FUNCTIONAL DESCRIPTION

4.1 RNC PERFORMANCES Maximum number of filtering criteria (traceFilterList) in a trace session template: 1 Maximum number of trace records (traceRecordList) in a trace filter: 48 The RNC CNode trace capacity is limited on a TMU basis (see below). Additionally, following rules apply to concurrent sessions:

RNC only allows simultaneously: 20 CTb, 1CTa, 1 CTg, 1CTn, 1 OTCell, 1 OTIuCs, 1 OTIuPs, OTIur and 1 OTIuBc sessions

At most 3 simultaneous calls can be traced on a PMC-RAB in a CTb session

At most 3 simultaneous calls can be traced on a PMC-RAB in a CTg session

CTb, CTg, CTn and OTCell are exclusive with debug CTb/CTg sessions.

4.1.1 CTA PERFORMANCES There is exactly 1 CTa session per RNC at a time, automatically started (no user action requested to create the session) Number of templates associated to a CTa session: 3

Maximum number of calls (except emergency calls) traced in CTa in a RNC, per TMU = 5

4.1.2 CTB PERFORMANCES One and at the most only one "call debug" CTb session or 10 simultaneous "regular" CTb sessions are accepted.

4.1.3 CTG PERFORMANCES There is up to 1 CTg session per RNC at a time.

Maximum number of calls traced in CTg in a RNC, per TMU = 10.

Max_Ctg_Ndm_Comm_per_Tmu = 3 ((within the previous 10) calls that can be selected for NDM (NBAP Dedicated Measurements) if required in Ctg session (based on 1 session max Ctg per RNC as today).

Administrator

AdministratorPMC-RAB

Administrator

AdministratorTMUCALL

Administrator

Administrator

Administrator



4.1.4 CTN PERFORMANCES Only 1 CTn session per RNC is allowed at a time.

Maximum number of calls simultaneously traced in CTn in a RNC, per TMU = 300.

4.1.5 OTCELL PERFORMANCES There is only 1 Object Trace Cell session per RNC at a time. One, n or all cells of a RNC can be simultaneously traced.

RNC shall have another limit on the maximum number of cells allowed per TMU. In case that the number of cells which are configured in OTCELL are allocated and handled on the same TMU is more than the maximum number of cells which are allowed (as shown the in table below), RNC will not reject the session because it is too late for it to do so. Instead, the TMU only initiates measurements for the maximum number of cells allowed and ignores the rest of them at random. In this case, RNC will not notify the user the list of cells which are ignored.



4.1.6 OTIU-CS PERFORMANCES Only 1 OTIuCs session per RNC is allowed at a time.

Maximum number of RANAP PAGING messages traced by OTIuCs session = 8 messages/s per TMU.

4.1.7 OTIU-PS PERFORMANCES Only 1 OTIuPs session per RNC is allowed at a time.

4.1.8 OTIUR PERFORMANCES Only 1 OTIur session per RNC is allowed at a time.

4.1.9 OTIU-BC PERFORMANCES Only 1 OTIuBc session per RNC is allowed at a time.

4.1.10 OVERLOAD MANAGEMENT A CTa session is suspended when the RNC overload level reaches OAM_OV_LEVEL_ MAJOR and is resumed when overload level goes below this value.

A CTb session is suspended when the RNC overload level reaches OAM_OV_LEVEL_ MAJOR and is resumed when overload level goes below this value.

A CTg session is suspended when the RNC overload level reaches OAM_OV_LEVEL_MAJOR without impact of the NDM configuration and is resumed when overload level goes below this value.

A CTn session is suspended when the RNC overload level reaches OAM_OV_LEVEL_ MINOR and is resumed when overload level goes below this value.

An OTCell session is suspended when the RNC overload level reaches OAM_OV_LEVEL_MAJOR and is resumed when overload level goes below this value.

An OTIuCs, OTIuPs, OTIur or OTIuBc session is suspended when the RNC overload level reaches OAMOV_LEVEL_MINOR and is resumed when overload level goes below this value.



5 CALL TRACE ACTIVATION/DEACTIVATION

5.1 CALL TRACE WIZARD The Call Trace Configuration Wizard application allows you to manage call trace sessions and trace session templates.

The following types of trace sessions are managed by the Wizard:

Access Session

Cell Session

Geographical Session

Neighboring Session

Object Trace Session Using the Wizard, you can create, delete and/or print records of trace sessions and trace session templates. You can also create your own templates, based on predefined trace records.

5.1.1 LAUNCHING CALLTRACE WIZARD You can reach the Call Trace Wizard application from the Performance menu of the NSP main window (Performance/Radio Access/ Call Trace Configuration Wizard) The following figure shows how to access the Call Trace Configuration Wizard command.

Figure 1 Call Trace Configuration Wizard command

The Call Trace Configuration Wizard option of the Radio Access command allows you to:

Create, delete and print reports of trace sessions

Create, delete and print reports of trace session templates

The following figures show the Call Trace Configuration Wizard window when the Call Trace Wizard command is launched.



Figure 2 Call Trace Configuration Wizard window

Next button.

Next button.



.

5.2 HOW TO CREATE AN ACCESS SESSION (CTB)

5.2.1 CREATING ONE OR MORE ACCESS SESSIONS ON ONE RNC 1. Launch the Call Trace Configuration Wizard procedure.

2. Enable the Access session option and click the Next button

3. Enable the Create one or more Access sessions on single RNC option and click the Next button.

A window appears with the "RNC and NBAP parameters" fields. The following figure is an example of equipment and NBAP parameters selection:



4. Select in the "Equipment Identification" field the RNC to trace.

5. Enter a value (ms) in the NBAP Parameters fields. The values of SIR, TCP and RTT periods (ms) must be:

Between 500 and 10000,

Multiplier of 500 (or "modulo" 500). Click the Next button.

A window appears with the "Mobile identification and session parameters" fields. The following figure is an example of user equipment and session parameters selection:



6. Select in the "Mobile identification" field, one of the following traceUeidType identities:

IMSI (6 to 15 decimal digits) Most used IMEI (15 decimal digits) TMSI (8 hexadecimal digits) P-TMSI (8 hexadecimal digits)

7. Fill in the identifier according to the selected type. You can only type valid digits for mobile identification.

8. Select or enter in the "Session Parameters" field:

Session Template: select a session template. By default, the template named StandardTroubleShooting" is selected.

User Label: you have to enter a unique label.

Duration (min): you have to fill-in the session duration. Note: 0 minute = infinite session duration

Session Note: you can write some personal information about the session.

Start Time: enter the lapse of time (in minutes) between the creation of the session and its first activation. The default value 0 means that the session will start immediately.

File Upload Size: enter the maximum size of the trace file. The maximum value is 1024. The default value is 512kb.

File Upload Period: enter the lapse of time before the trace file is closed and made available. The default value is 15mn.

9. Click the Add button.

The parameters selected are verified. An error message is returned if:

The user label entered is already used.

No template has been selected.

The UE identifier is not typed correctly.

The UE equipment is already used in another trace session.

The session note exceeds the maximal number of characters.

The duration exceeds the maximum authorized value.

The file upload size value exceeds the maximum authorized value.

If the parameters are correct, the selected equipment appears in the list with session parameters.

10. Repeat steps 6 to 9 to add more mobiles to the trace session. You can create up to 10 simultaneous sessions on the selected RNC.

11. When you have finished your selection, click the Next button. A window appears with a summary of the session parameters selected.



Figure 3 Summary of the session parameters

12. Click the Create button to confirm the access session creation.

Depending on the OAM version, there is two different ways to terminate the activation:

In OAM 5.1: The "Call Trace Configuration Wizard" window appears with a summary result in the "Wizard status" field.



Figure 4 Summary result in the "Wizard status" field.

13. Click the Finish button.

If an error occurs during the creation, a confirmation window is displayed which describes the error. You can proceed with the creation in spite of the error or cancel the operation. If you select "Cancel", all the objects already created are deleted (but no synchronization is performed after that). If the operation is successful and the Launch report window on close option is enabled, the following window appears with the results:

Figure 5 Launch report window

14. Click the Close button to close the window.



From OAM 5.2

The "Call Trace Configuration Wizard" window appears with a summary result and the session name to activate in the "Wizard status" field.

The session Manager window appears also.



In the session manager window, choose the correct session name in the session list at left. Then in the Actions click on the activation button and then launch. The progress and status of the activation can be checked in bottom part of the right window.

After a successful activation, the session can be terminated by clicking the middle icon in the upper left part.

13. Click the Finish button in the "Call Trace Configuration Wizard




Figure 6 Launch report window




5.2.2 CREATING AN ACCESS SESSION MULTIPLE RNCS

1. Launch the Call Trace Configuration Wizard procedure.

2. Enable the Access session option and click the Next button

3. Enable the Create single Access session on one or more RNCs option and click the Next button. A window appears with the RNCs and NBAP parameters fields. The following figure is an example of equipment and NBAP parameters selection:

4. Enter a value (ms) in the NBAP Parameters fields.The values of SIR, TCP and RTT periods (ms) must be:

Between 500 and 10000, Multiplier of 500 (or "modulo" 500).

5. Click the Add button. The selected RNC appears in the list with the associated NBAP parameters.

6. Repeat steps 4 and 5 to add more RNCs to the trace session.

7. If you want to remove a RNC, select it in the list and click the Remove button.

8. When you have finished your selection, click the Next button.

A window appears with the "Mobile identification and session parameters" fields.



9. Select one of the following traceUeidType identities in the "Mobile Identification" field:

IMSI (6 to 15 decimal digits) IMEI (15 decimal digits) TMSI (8 hexadecimal digits) P-TMSI (8 hexadecimal digits) 10. Enter the identifier, according to the selected type.

11. Select or enter in the "Session Parameters" field:

Session Template: select a session template. By default, the template named "TroubleShooting Light" is selected.

User Label: you have to enter a unique label.

Duration (min): you have to fill-in the session duration. Note: 0 minute = infinite session duration

Session Note: you can write some personal information about the session.

Start Time: enter the lapse of time (in minutes) between the creation of the session and its first activation. The default value 0 means that the session will start immediately.

File Upload Size: enter the maximum size of the trace file. The maximum value is 1024. The default value is 512kb.

File Upload Period: enter the lapse of time before the trace file is closed and made available. The default value is 15mn.

12. Click the Next button.






The UE identifier is not typed correctly.

The UE equipment is already used in another trace session.



The file upload size value exceeds the maximum authorized value.

If the parameters are correct, the selected equipment appears in the list with session parameters.

13. When you have finished your selection, click the Next button. A window appears with a summary of the session parameters selected.

14.

In OAM 5.1: Click the Create button to confirm the access session creation.

From OAM 5.2: Click the Create button and Activate the session from the session manager (See 5.1 for more details)





5.3 HOW TO CREATE A GEOGRAPHICAL SESSION 1. Launch the Call Trace Configuration Wizard procedure.

2. Enable the Geographical session option and click the Next button

A window appears with an "Equipment Selection" field

3. The "Call Trace Configuration Wizard" window appears with the following parts in the "Equipment Selection" field:

"Available Equipments" displays the list of available targets in a Tree View or in a Flat View. The view type is selected by the combo box at the top.

"Selected Equipments" displays the selected FDDCells.

Command buttons are located in the middle:

- Select ->: used to add the target(s) in the selected target list. If you select a non terminal object (RNC or NodeB) in the Tree View, all FDDCells attached to this object are also added.

- Select All ->: used to add all FDDCells

- Remove: used to remove the target(s) from the Equipment List - Remove All: used to remove all FDDCells from the Equipment List

4. When you have selected the required equipment, click the Next button.

A window appears with the "RNC and NBAP parameters" fields. The following figure is an example of equipment and parameters selection:



5. The "RNC and NBAP parameters" list displays the list of selected RNCs and RNCs containing selected objects (CNodes or FDDCells).You can update the NBAP parameters of the RNCs displayed in the list:

a. Select in the list the RNC that you want to update.

b. Modify the value of the "SIR Period", "TCP Period" and "RTT Period" fields. The value must meet the following requirements:

it must be between 500 and 10000,

it must be a multiplier of 500 (or "modulo" 500). You cannot modify the NBAP parameters of a RNC if you have not selected all the objects contained in this RNC for the trace session. c. Click the Update button.

d. Repeat steps a to c to update other RNCs.

6. When you have done the required modifications, click the Next button.




7. Enter the following information in the "Session Parameters" fields:

Call Type List: Types of call that will be traced within the session. Any combination of call types above can be chosen, without any restrictions

Session Template: select a session template. By default, the template named

"StandardTroubleShooting" is selected.

User Label: enter a unique label.

Duration (mn): enter the session duration. The maximum duration is 65535. The default value 0 corresponds to infinite session duration.

Session Note: enter additional information about the session. The maximum number of characters is 32.

Start Time: enter the lapse of time (in minutes) between the creation of the session and its first activation.

File Upload Size: enter the maximum size of the trace file. The maximum value is 1024.

File Upload Period: enter the lapse of time before the trace file is closed and made available.

8. Click the Next button. The parameters selected are verified. An error message is returned if:





A window appears with a summary of the session parameters selected

9.





10. Click the Finish button. If the Launch report window on close option is enabled, a new window appears with the results.




5.4 HOW TO CREATE A CELL SESSION


2. Enable the Cell session option and click the Next button

3. Steps 3 to 5 from the Geographical session steps


Session Template: select a session template. By default, the template named

"StandardTroubleShooting" is selected.
















6.




8. Click the Close button to close the window

5.5 HOW TO CREATE AN OBJECT SESSION 1. Launch the Call Trace Configuration Wizard procedure.

2. Enable the IuCS or IuPS or IuR or IuBC session and click the Next button. The example below is for a IuCS session.

A window appears with the "IuCs equipment identification and session parameters" fields.




Equipment Identification: displays the list of available equipments where the traces will be taken.

Session Template: select a session template. By default, the template named "StandardTroubleShooting" is selected. When the objectif is tracing Nbap Common Measurement, it is recommended to create a template including: NBAPCommonMeasurementCallP and NBAPCommonMeasurementCallTrace














5.




7. Click the Close button to close the window

5.6 HOW TO CREATE A CTN SESSION




2. Enable the Neighboring session option and click the Next button

A window appears with an "Equipment Selection" field

4. When you have selected the required equipment, click the Next button.





Call Type List: Types of call that will be traced within the session. Any combination of call types above can be chosen, without any restrictions

Session Template: select NeighboringOptimization template.







8. Click the Next button. A window appears with a summary of the session parameters selected

9.





5.7 HOW TO DELETE A SESSION 1. Launch the Call Trace Configuration Wizard procedure.

2. Enable the Delete a Trace Session option and click the Next button.

A window appears with the Trace Sessions and "Note" fields. This window displays all the existing Call Traces with the following information:

External Session Id

User Label

Type

Date

RNC list

Duration (mn) .



3. Select the Trace session(s) to delete. To delete several trace sessions at the same time, press the "Ctrl" tab while selecting the trace sessions to be deleted.

4. Click the Next button

A window appears with information on the traces to be deleted in the "Trace Sessions" field. The following figure is an example of confirmation of the trace session to be deleted:

5. Click the Delete button to confirm the access session deletion.

Depending on the OAM version, there is two different ways to terminate the activation:

In OAM 5.1:

The "Call Trace Configuration Wizard" window appears with a summary result in the Wizard status field. The following figure is an example with a summary result of the trace session to be deleted.



6.Click the Finish button.

The "Call Trace Configuration Wizard" window appears with the results if the "Launch report window on close" option is enabled. The following figure is an example with a summary result of the trace session to be deleted.

7. Click the Close button to close the "Call Trace Configuration Wizard: results" window.

In OAM 5.2

The "Call Trace Configuration Wizard" window appears with a summary result and the session name to activate in the "Wizard status" field.



The session Manager window appears also.

In the session manager window, choose the correct session name in the session list at left. Then in the Actions click on the activation button and then launch. The progress and status of the activation can be checked in the bottom part of the right window.



After a successful activation, the session can be terminated by clicking the middle icon in the upper left part.



6 CALL TRACE TEMPLATE MANAGEMENT Session templates are proposed to ease session configuration by the OMC users who do not need to specify the record types they want and the associated modes, anytime they create a session.

A session template contains a trace type and a pre-defined list of record types with the associated modes

W-NMS Call Trace Configuration Wizard is the tool to be used for templates management. It allows to create (or delete) templates that will make only requested traces types to be provided by the system. Typically, templates will be dedicated to troubleshooting or network design optimization, but some custom templates may be defined for every specific usage.

A given number of pre-defined templates are delivered with the Call Trace Configuration Wizard. They are dedicated to some typical usages that are described hereafter. The most used templates are the following ones (See Annex 9.3 for more details):

1. "Heavy troubleshooting":

This template has to be used only in case of advanced investigations and associated session should be activated only for a given period of time. Indeed, this template is very impacting for the system as it requires almost all the possible traces. It will be typically used for CTb or CTg sessions (with limited scope in terms of number of cells).

2. "Standard troubleshooting":

This template is the default one proposed by the Call Trace Wizard. It is intended to be used for basic troubleshooting operations. It should provide all needed traces for "standard" investigations. It will be typically used for CTb or CTg sessions (with limited scope in terms of number of cells).

3. "Call Monitoring":

This template is intended to be used to monitor a given area of the network, for example after some optimization or maintenance operations have been performed. It will provide only basic traces related to call management (establishment, release, failure). It will be typically used for CTb or CTg sessions (with limited scope in terms of number of cells).

4. "Optimization":

This template is dedicated to engineering operations in order to obtain traces that can be used for network or radio optimization. It will be typically used for CTb or CTg sessions (with limited scope in terms of number of cells).

5. "Neighboring Optimization":

This template is dedicated to CTn session and contains all traces managed in this session. It can be only associated to CTn session.



6.1 CREATE A TRACE SESSION TEMPLATE 1. Perform the How to launch the Call Trace Configuration Wizard procedure.

2. Enable the Manage the Trace Session Template option and click the Next button.

3. Enable the Create a Trace Session Template option and click the Next button.

A window appears with "Trace Session Template Parameters" fields. The following figure is an example of template parameters selection:

4. Enter a unique name in the "Template Name" field.

5. The "Trace Record List" displays the list of available trace filters:

Select one or more records in the "Trace Record" list. 6. Select one of the following filter modes in the "Mode" field:

eventOnly

This mode provides the header including in particular: the traced sub-function, a record name, a time-stamp, the related cell Id (if relevant), the related RNC Id. ASN.1

This mode provides the header and the full record information, coded in ASN.1; this mode applies only to UTRAN protocols PDUs (available for rrc, Iu, Iub, Iur 3GPP messages) and does not apply to I-node

ctxfull

This mode provides a specific set of data in XDR format associated to the event not available for event linked to Iu/Iur/iub/rrc ASN.1 messages, except for RRC Dedicated Measurements.




A window appears with the "Trace Filter Parameters" fields. The following figure is an example of trace filter parameters selection 8. Click the Next button.

The list of trace records is verified. An error message is returned if:

The filter name entered is already used or no name has been entered.

The filter name exceeds the maximal number of characters or it contains the character ",".

No trace record has been retrieved by the system.

A window appears with a summary of the trace session template parameters selected:

11. Click the Create button to confirm the trace session template creation.




If the Launch report window on close option is enabled, a new window appears with the results.


6.2 HOW TO DELETE A TRACE SESSION TEMPLATE 1. Perform the How to launch the Call Trace Configuration Wizard procedure.

2. Enable the Manage the Trace Session Template option and click the Next button.

3. Enable the Delete a Trace Session Template option and click the Next button.

4. Follow steps 4-8 from how to delete a session



7 CALL TRACE POST-PROCESSING TOOLS

7.1 CALL TRACE FILES COLLECTION

The XML CallTrace AccessSession (CTa) files are generated on PerfServer in the following directory: /opt/nortel/data/utran/callTrace/onOAMdemand/

The XML geographical trace (CTg) files are generated on PerfServer in the following directory: /opt/nortel/data/utran/callTrace/originatedFromGeographicalArea/

The XML neighboring trace (CTn) files are generated on PerfServer in the following directory: /opt/nortel/data/utran/callTrace/ NeighboringTrace /

The XML ObjectTrace CellSession (OTCell) files are generated on PerfServer in the following directory:

/opt/nortel/data/utran/objectTrace/cell///*

Example:

To retrieve the output files of an AccessSession (CTa) from the PerfServer:

1. Go to the directory: /opt/nortel/data/utran/callTrace/onOAMdemand

2. Here is the file hierarchy under the previous directory:

3. All the xml files of interest should be ftp-ed

4. Cleaning the files on the perf server needs to be done

IMSI-



7.2 POST-PROCESSING TOOLS In UA5.0, there are two engineering tools that post-process the Call trace files:

RFO (Radio Frequency Optimization): internal tool for engineering WQA (Wireless Quality Analysis): product tool

RFO UMTS/HSDPA RF Optimizer is an internal software tool used to analyze and optimize Alcatel Lucents UMTS/HSDPA wireless networks. UMTS/HSDPA RFO analyzes:

Log files collected from mobiles,

Call Traces collected at RNC through WMS

NodeB logs collected at base stations.

It analyses the data from those different physical files to create various statistics, charts and views of the data.

The Call Trace files types supported are:

Control Node (CN) & Interface Node (IN) (xml) from UTRAN 3.2, 4.1, 4.2, 5.0 and 6.0

CTa, CTb, CTg, CTn, OTCell

For more information about the tool, you can refer to:

RFO UMTS/HSxPA Overview & Training

WQA Wireless Quality Analysis is the tool to be used for CTn traces post-processing.

It offers a web-based interface with a server running on PC hardware. Two different steps are part of the post-processing activity:

data collection and parsing

data reporting

Reporting is performed on data organized in WQA database. Both pre-defined reports and custom reports can be run.

Following reports are available with the tool:

Summary

o Summary report (data and statistics per cell) Soft handovers

o Soft handovers report

o Soft handover failures report



o Detected cells report

o HSXPA relations report

Inter-frequency

o Inter-frequency handovers report

3G to 2G handovers

o 3G2G CS inter-RAT handovers report

o 3G2G PS inter-RAT handovers report

2G to 3G handovers

o 2G3G CS inter-RAT handovers report

o 2G3G PS inter-RAT handovers report

WQA is also the tool to post-process the call failure trace snapshots. It produces reports built from Call Failure Trace data block content issued from one or several CTg sessions.

It is possible to customise the report by using filters like: cell id, failure cause value, call type

For more information about the tool, you can refer to:

WQA User Guide (Ctn part) (NN-20500-128)



8 ABBREVIATIONS AND DEFINITIONS

8.1 ABREVIATIONS ALCAP Access Link Control Application Protocol ASN.1 Abstract Syntax Notation 1 ATM Asynchronous Transfer Mode CN Control Node CM XML Configuration Management XML CP Control Processor (in the Interface Node) CT Call Trace CTa Call Trace a CTb Call Trace b CTg Call Trace g (Geographic Call Trace) CTn Call Trace n (Neighboring Call Trace) IMEI International Mobile Equipment Identity IMSI International Mobile Subscriber Identity IN Interface Node NBAP Node B Application Part OMU Operation and Maintenance Unit OT Object Trace RANAP Radio Access Network Application Part RL Radio Link RNC Radio Network Controller RNS Radio Network Subsystem RNSAP Radio Network Subsystem Application part RRC Radio Resource Control SRNC Serving RNC TMSI Temporary Mobile Subscriber Identity TMU Traffic Management Unit UE User Equipment UTRAN Universal Terrestrial Radio Access Network XDR eXternal Data Representation standard (IETF RFC 1832) WQA Wireless Quality Analyzer XML Extensible Markup Language



9 ANNEX

9.1 CN FUNCTIONS AND SUB-FUNCTIONS TRACEABLE PER SESSION TYPE

CTa CTb CTg CTn OT-Cell

OT-IU CS/PS

OT-IUbc

OT-IUR

RRC RRCDedicatedTraffic x X X

RRCCommonTraffic X

RRCDedicatedMeasurementCallP

X X

RRCCommonMeasurement X

RRCDedicatedMeasurementReportAsn1

X X

RRCDedicatedMeasurementReportDecoded

X X

RRCDedicatedMeasurementCallTrace

X X

UE

UEActiveSetManagement X X X

UEHSDPAManagement X X X

UEEDCHManagement X X X

IUb

NBAPDedicatedTraffic X X X

NBAPCommonTraffic X

NBAPDedicatedMeasurementCallP X X X

NBAPCommonMeasurementCallP X

NBAPDedicatedMeasurementCallTrace

NBAPCommonMeasurementCallTrace

QAAL2IubDedicated X X X

Iu

RANAPDedicatedCS X X X

RANAPCommonCS X

RANAPDedicatedPS X X X




OT-IU CS/PS

OT-IUbc

OT-IUR

RANAPCommonPS x

QAAL2IuDedicated X X X

DTAP

DTAPRRCDedicated X X X

DTAPRANAPDedicatedCS X X X

DTAPRANAPDedicatedPS X X X

Error Sig Plane NBAPError X X X X

RANAPError X X X X

RNSAPError X X X x

RRCError X X X x

SABPError X

PCAPError

Snapshot

CommunicationStartSCCPConnection X X X

CommunicationStartRRCConnection x X X

CommunicationStartRadioAccessBearer x X X

CommunicationStartRLServingRNC X X X

CommunicationStartRLDriftRNC X X X

CommunicationEndRRCConnection X X X

CommunicationEndSCCPConnection X X X

CommunicationEndRadioAccessBearer X X X

CommunicationEndRLServingRNC X X X

CommunicationEndRLDriftRNC X X X

CommunicationDropSCCPConnection X X X

CommunicationDropRadioBearer X X X

CommunicationDropRadioLink X X X

IUr

RNSAPDriftDedicated

RNSAPServingDedicated X x X

QAAL2IurServingDedicated X X X

RNSAPServingCommon x




OT-IU CS/PS

OT-IUbc

OT-IUR

RNSAPDriftCommon X

RNSAPServingDedicatedMeasurement X X X

QOS AlwaysOn X X X

RlcMacIrmSchedulingDowngrading X X X

QoSiRMPreemption X X X

iRMSchedulingDowngrade x X X

iRMSchedulingUpgrade X X X

RadioBearerRateAdapatation X x X

IuPC UPCGPSDataAssistance x x X X

SABP CBMessageOperation X

BroadcastServiceAreaLevelOperation x

CTn CTnIntraRNCHO X

CTnInterRNCHO X

CTnRRC X

CTnInterFrequencyHO X

CTn2g3gHO X

CTnInterRATHO X

CTnSRNSRelocationIncoming X

CTnSRNSRelocationOutgoing X

CTnDetectedCellReport X

Call Debug CallDebug_SWES_ All_Events X

CallDebug_SWES_ALL_Received_Internal_Messages

X

CallDebug_SWES_ALL_Step0_Messages X






OT-IU CS/PS

OT-IUbc

OT-IUR

CallDebug_UE_CALL_All_Messages X

CallDebug_UE_CALL_Step0_Messages X



CallDebug_UE_RRC_ALL_Messages X

CallDebug_UE_RRC_Step0_Messages X

CallDebug_UE_RRC_Step1_Messages X

CallDebug_UE_RRM_ALL_Messages X

CallDebug_UE_RRM_Step0_Messages X

CallDebug_UE_RRM_Step1_Messages X

CallDebug_IU_CALL_All_Messages X

CallDebug_IU_CALL_Step0_Messages X

CallDebug_IU_CALL_Step1_Messages X

CallDebug_NOB_CALL_All_Messages X

CallDebug_NOB_CALL_Step0_Messages X



CallDebug_RNC_CALL_All_Messages X

CallDebug_RNC_CALL_Step0_Messages X

CallDebug_RNC_CALL_Step1_Messages X

CallDebug_IUR_CALL_All_Messages X

CallDebug_IUR_CALL_Step0_Messages X

CallDebug_IUR_CALL_Step1_Messages X

CallDebug_IUPC_All_Messages X

CallDebug_IUPC_Step0_Messages X

CallDebug_IUPC_Step1_Messages X



9.2 IN FUNCTIONS AND SUB-FUNCTIONS TRACEABLE PER SESSION TYPE

CTa CTb CTg CTn OT-Cell OT-IU CS/PS

OT-IUbc

OT-IUR

Power ctrl.

RlcDchUlCrci X

UlSirSetPoint X

UlDecision X

RRC User Plane RRCTFCControl X X

FP

IubFPTADch x X

UserPlane Binary CtblCfgCallP

CtblCfgMobility

CtblCfgDataPath

CtblCfgRadioLink

CtblCfgMeasurement

CtblCfgCallPDump

CtblCfgDataPathDump

RLC DlRlcDch x x

UlRlcDch x x



9.3 TEMPLATES AND THEIR PRE-DEFINED LIST OF RECORD TYPES AND ASSOCIATED MODES traceFilter id List of associated traceRecord ids traceModeList

HeavyTroubleShooting RRCDedicatedTraffic RRCCommonTraffic (*) RRCDedicatedMeasurementCallP RRCDedicatedMeasurementCallTrace RRCDedicatedMeasurementReportAsn1 RRCDedicatedMeasurementReportDecoded RRCCommonMeasurement (*) UEFull NBAPDedicatedTraffic NBAPCommonTraffic (*) NBAPCommonMeasurementCallP (*) NBAPDedicatedMeasurementCallP NBAPCommonMeasurementCallTrace (*) QAAL2IubCommon (*) QAAL2IubDedicated RANAPFull DTAPFull ErrorFull CommunicationFull RNSAPFull QoSFull IUPCGPSDataAssistance SABPFull RLCFull PowerControlFull RRCTFCControl IubFPTADch

ctxFull + asn1

StandardTroubleShooting RRCDedicatedTraffic RRCCommonTraffic (*) RRCDedicatedMeasurementCallP RRCDedicatedMeasurementCallTrace RRCDedicatedMeasurementReportAsn1 RRCDedicatedMeasurementReportDecoded RRCCommonMeasurement (*) UEFull NBAPDedicatedTraffic NBAPCommonTraffic (*) NBAPCommonMeasurementCallP (*) NBAPDedicatedMeasurementCallP QAAL2IubDedicated RANAPFull DTAPFull ErrorFull CommunicationFull RNSAPFull QoSFull IUPCGPSDataAssistance UlSirSetPoint UlDecision

ctxFull + asn1

CallMonitoring QoSFull CommunicationFull UEFull

ctxFull



traceFilter id List of associated traceRecord ids traceModeList

Optimization RRCFull UEFull NBAPDedicatedTraffic NBAPCommonTraffic (*) NBAPCommonMeasurementCallP (*) NBAPDedicatedMeasurementCallP NBAPCommonMeasurementCallTrace (*) NBAPDedicatedMeasurementCallTrace RANAPDedicatedCS RANAPCommonCS (*) RANAPDedicatedPS RANAPCommonPS (*) DTAPFull CommunicationFull RNSAPFull QoSFull RLCFull PowerControlFull

ctxFull + asn1

Neighboring optimization CTnFull ctxFull

END OF DOCUMENT

Documents

Call Trace User Guide V3.0