01-02 bss signaling tracing

2 BSS Signaling Tracing

About This Chapter

BSS signaling tracing refers to the signaling tracing on the Um interface, Abis interface, Ainterface, Pb interface, and BSC-CBC interface, and single user signaling tracing.

2.1 Signaling Tracing on the Um InterfaceThe signaling tracing on the Um interface refers to the tracing of signaling on the Um interfacein cells on the maintenance terminal. In practice, you can use test MSs and related software toperform this function. The maintenance terminal is rarely used.

2.2 Signaling Tracing on the Abis InterfaceThe traced signaling messages on the Abis interface are the RSL messages, OML messages, andLAPD messages.

2.3 Signaling Tracing on the A InterfaceThe traced signaling messages on the A interface are the BSSAP messages, SCCP messages,MTP3 messages, and MTP4 messages.

2.4 Signaling Tracing on the Pb InterfaceThe traced messages on the Pb interface are the application messages and the LAPD messages.

2.5 Signaling Tracing on the BSC-CBC InterfaceDuring signaling tracing on the BSC-CBC interface, the signaling messages on the interfacebetween the BSC and the CBC are traced.

2.6 Signaling Tracing of a BSC UserSignaling tracing of a BSC user supports tracing by the IMSI, TMSI, IMEI, MSISDN, andchannel identifier.

HUAWEI BSC6000 Base Station SubsystemSignaling Analysis Guide 2 BSS Signaling Tracing

Issue 01 (2007-09-05) Huawei Technologies Proprietary 2-1

2.1 Signaling Tracing on the Um InterfaceThe signaling tracing on the Um interface refers to the tracing of signaling on the Um interfacein cells on the maintenance terminal. In practice, you can use test MSs and related software toperform this function. The maintenance terminal is rarely used.

FunctionsThe signaling tracing on the Um interface refers to the tracing of signaling on the Um interfacein cells on the maintenance terminal. In practice, you can use test MSs and related software toperform this function. The maintenance terminal is rarely used.

Procedure1. On the BSC Maintenance System, select Trace & Monitor. The signaling tracing

navigation tree is displayed.2. Choose Trace > Trace the Message at Um Interface. The Trace the Message at Um

Interface dialog box is displayed, as shown in Figure 2-1.

Figure 2-1 Trace the Message at Um Interface dialog box

2 BSS Signaling TracingHUAWEI BSC6000 Base Station Subsystem

Signaling Analysis Guide

2-2 Huawei Technologies Proprietary Issue 01 (2007-09-05)

NOTE

l The tracing mode can be "Report" or "Save on GBAM".

"Report" means to send the traced messages directly to the LMT. You can specify the savingpath of the traced messages in the Saving File area. The file contains all the signaling messageson the Um interface traced during a specified period of time.

"Save on GBAM" means to save the traced messages directly on the GBAM. Then the LMT nolonger receives the messages. You can specify the tracing period in the Tracing Time area.

l You can specify the color of the displayed tracing results in the Color area. This operation takeseffect only after you select Report in the Tracing Mode area.

l The maximum value 16 means that at most 16 cells can be selected.

3. Select the parameters in the Filtering Parameters and the Site.l In the Tracing Mode area, select Report. Then click OK. The signaling tracing in

Report mode starts, as shown in Figure 2-2.l If you select Save on GBAM in the Tracing Mode area, the signaling tracing in Save

on GBAM mode starts.lFigure 2-2 Traced messages on the Um interface

Additional Informationl Cell Number

Number of the cell where the signaling is to be traced, decimall TRX Number

Number of the TRX where the signaling is to be traced, decimal



ExampleOn the BSC Maintenance System, you can double-click a message on the Um interface to viewthe type of the message and the detailed explanation. See Figure 2-3.

Figure 2-3 A message on the Um interface

2.2 Signaling Tracing on the Abis InterfaceThe traced signaling messages on the Abis interface are the RSL messages, OML messages, andLAPD messages.

2.2.1 RSL Message Tracing on the Abis interfaceDuring RSL message tracing on the Abis interface, all the signaling messages transferred throughthe TRXs can be traced.

2.2.2 OML Message Tracing on the Abis interfaceThe messages on all the OMLs are traced during OML message tracing on the Abis interface.

2.2.3 Trace the LAPD Message at Abis Interface dialog boxDuring LAPD message tracing on the Abis interface, the links that correspond to the specifiedTRX or site are traced.




2.2.1 RSL Message Tracing on the Abis interfaceDuring RSL message tracing on the Abis interface, all the signaling messages transferred throughthe TRXs can be traced.

FunctionThe functions of the RSL message tracing on the Abis interface are as follows:l Supporting filtering by TRX or cell. For the latter, a maximum of 16 cells are supported.

l Supporting filtering by message type. The messages are the DCM (measurement report),DCM (others), CCM (channel request), CCM (others), RLM, and TRXM.


navigation tree is displayed.2. Choose Trace > Trace the Message at Abis Interface > RSL Message. The Trace the

RSL Message at Abis Interface dialog box is displayed, as shown in Figure 2-4.

Figure 2-4 Trace the RSL Message at Abis Interface dialog box



NOTE


"Report" means to send the traced messages directly to the LMT. You can specify the savingpath of the traced messages in the Saving File area. The file contains all the signaling messageson the Abis interface traced during a specified period of time.




3. Set the parameters in the Message Type and the Filtering Parameters areas.l In the Tracing Mode area, select Report. Then click OK. The RSL message tracing

in Report mode starts. The tracing results are displayed, as shown in Figure 2-5.l In the Tracing Mode area, select Save on GBAM. Then click OK. The RSL message

tracing in Save on GBAM mode starts.

Figure 2-5 Traced RSL messages on the Abis interface

Additional Information Common Channel Managementl Channel Request

l Paging Command

l OthersThe other common control messages are as follows:– BCCH Information




– CCCH Load Indication

– SMS Broadcast Command

– CBCH Load Indication

– Delete Indication

– Immediate Assignment Command

Dedicated Channel Managementl Measurement Report

Measurement Resultl Others

The DCM consists of the following messages:– Channel Activation

– Channel Activation Acknowledge

– Channel Activation Negative Acknowledge

– Connection Failure Indication

– Deactivate SACCH

– Encryption Command

– Handover Detection

– Talker Detection

– Listener Detection

– Mode Modify Request

– Mode Modify Acknowledge

– Mode Modify Negative Acknowledge

– Physical Context Request

– Physical Context Confirm

– RF Channel Release

– MS Power Control

– BS Power Control

– Preprocess Configure

– Preprocessed Measurement Result

– RF Channel Release Acknowledge

– SACCH Info Modify

– Remote Codec Configuration Report

– Round Trip Delay Report

– Pre-Handover Notification

– MultiRate Codec Modification Request

– MultiRate Codec Modification Acknowledge

– MultiRate Codec Modification Negative Acknowledge

– MultiRate Codec Modification Performed



– TFO Report

– TFO Modification Request

l TRX ManagementThe TRXM consists of the following messages:– SACCH Filling

– Overload

– Error Report

– RF Resource Indication

l Radio Link ManagementThe RLM consists of the following messages:– Data Request

– Data Indication

– Error Indication

– Establish Request

– Establish Confirm

– Establish Indication

– Release Request

– Release Confirm

– Release Indication

– Unit Data Request

– Unit Data Indication

ExampleOn the BSC Maintenance System, you can double-click an RSL message on the Abis interfaceto view the type of the message and the detailed explanation. See Figure 2-6.




Figure 2-6 An RSL message on the Abis interface

2.2.2 OML Message Tracing on the Abis interfaceThe messages on all the OMLs are traced during OML message tracing on the Abis interface.

FunctionsThe functions of the OML message tracing on the Abis interface are as follows:l Supporting filtering by site. A maximum of 16 sites are supported.

l Supporting filtering by message type. The messages are categorized into the commonmessages and the O&M messages.


navigation tree is displayed.2. Choose Trace > Trace the Message at Abis Interface > OML Message. The Trace the

OML Message at Abis Interface dialog box is displayed, as shown in Figure 2-7.



Figure 2-7 Trace the OML Message at Abis Interface dialog box

NOTE






3. Select the Message Type. Choose a site in the Candidate Sites area and add it to theSelected Sites area.l In the Tracing Mode area, select Report. Then click OK. The OML message tracing

in Report mode starts. The tracing results are displayed in Figure 2-8.l In the Tracing Mode area, select Save on GBAM. Then click OK. The OML message





Figure 2-8 Traced OML messages on the Abis interface

Additional Informationl O&M messages

The messages sent and received by the BTSOM module.l Common messages

The messages sent and received by the BTSCP module.

ExampleOn the BSC Maintenance System, you can double-click an OML message on the Abis interfaceto view the type of the message and the detailed explanation. See Figure 2-9.



Figure 2-9 An OML message on the Abis interface

2.2.3 Trace the LAPD Message at Abis Interface dialog boxDuring LAPD message tracing on the Abis interface, the links that correspond to the specifiedTRX or site are traced.

FunctionsDuring LAPD message tracing on the Abis interface, the links that correspond to the specifiedTRX or site are traced.


navigation tree is displayed.2. Choose Trace > Trace the Message at Abis Interface > LAPD Message. The Trace

the LAPD Message at Abis Interface dialog box is displayed, as shown in Figure 2-10.




Figure 2-10 Trace the LAPD Message at Abis Interface dialog box

NOTE






3. Select the Link Type and set the parameters in the Location area.l In the Tracing Mode area, select Report. Then click OK. The LAPD message tracing

in Report mode starts. The tracing results are displayed in Figure 2-11.l In the Tracing Mode area, select Save on GBAM. Then click OK. The LAPD message




Figure 2-11 Traced LAPD messages on the Abis interface

Additional Informationl Radio Signaling Link

l Operation & Maintenance Link

ExampleOn the BSC Maintenance System, you can double-click a LAPD message on the Abis interfaceto view the type of the message and the detailed explanation. See Figure 2-12.




Figure 2-12 A LAPD message on the Abis interface

2.3 Signaling Tracing on the A InterfaceThe traced signaling messages on the A interface are the BSSAP messages, SCCP messages,MTP3 messages, and MTP4 messages.

2.3.1 BSSAP Message Tracing on the A interfaceBSSAP message tracing on the A interface supports filtering by cell or message type.

2.3.2 SCCP Message Tracing on the A interfaceDuring SCCP message tracing on the A interface, the SCCP messages are traced.

2.3.3 MTP3 Message Tracing on the A InterfaceDuring MTP3 message tracing on the A interface, the MTP3 messages are traced.


2.3.1 BSSAP Message Tracing on the A interfaceBSSAP message tracing on the A interface supports filtering by cell or message type.

FunctionsThe functions of the BSSAP message tracing on the A interface are as follows:



l Supporting filtering by cell

l Supporting filtering by message type. The messages are the DTAP, BSSMAP, and Paging.


navigation tree is displayed.2. Choose Trace > Trace the Message at A Interface > BSSAP Message. The Trace the

BSSAP Message at A Interface dialog box is displayed, as shown in Figure 2-13.

Figure 2-13 Trace the BSSAP Message at A Interface dialog box

NOTE


"Report" means to send the traced messages directly to the LMT. You can specify the savingpath of the traced messages in the Saving File area. The file contains all the signaling messageson the A interface traced during a specified period of time.




3. Select the Message Type. Choose a site in the Candidate Sites area and add it to theSelected Sites area.l In the Tracing Mode area, select Report. Then click OK. The BSSAP message tracing

in Report mode starts. The tracing results are displayed in Figure 2-14.l In the Tracing Mode area, select Save on GBAM. Then click OK. The MTP3 message





Figure 2-14 Trace the BSSAP Message at A Interface dialog box

Additional InformationNone.

ExampleOn the BSC Maintenance System, you can double-click a BSSAP message on the A interfaceto view the type of the message and the detailed explanation. See Figure 2-15.



Figure 2-15 A BSSAP message on the A interface

2.3.2 SCCP Message Tracing on the A interfaceDuring SCCP message tracing on the A interface, the SCCP messages are traced.

FunctionsThe functions of the SCCP message tracing on the A interface are as follows:

l Supporting tracing by Destination Signaling Point (DSP) The messages are traced by thenetwork identification, OSP, and DSP.

l Tracing SCCP user messages

l Tracing MTP3 primitive messages The messages are traced by the network identification,OSP, and DSP.


navigation tree is displayed.

2. Choose Trace > Trace the Message at A Interface > SCCP Message. The Trace theSCCP Message at A Interface dialog box is displayed, as shown in Figure 2-16.




Figure 2-16 Trace the SCCP Message at A Interface dialog box

NOTE





3. l In the Tracing Mode area, select Report. Then click OK. The SCCP message tracingin Report mode starts. The tracing results are displayed, as shown in Figure 2-17.

l In the Tracing Mode area, select Save on GBAM. Then click OK. The SCCP messagetracing in Save on GBAM mode starts.



Figure 2-17 Traced SCCP messages on the A interface


ExampleOn the BSC Maintenance System, you can double-click an SCCP message on the A interfaceto view the type of the message and the detailed explanation. See Figure 2-18.




Figure 2-18 An SCCP message on the A interface


FunctionsThe functions of the MTP3 message tracing on the A interface are as follows:

l Supporting tracing by link. The number of the subrack, slot, CPU, and CIU slot of the linkare specified.

l Supporting tracing by link set

l Supporting tracing by DSP

l Supporting filtering by message type. The messages are the SNM, SLT, SCCP, TUP, ISUP,MT, UNKNOW, and L2_CHANGE.

l Supporting other filtering conditions that are:

– NI

– OPC

– DPC

– H1



– H0

– SLS

– CIC

– Message direction


navigation tree is displayed.

2. Choose Trace > Trace the Message at A Interface > MTP3 Message. The Trace theMTP3 Message at A Interface dialog box is displayed, as shown in Figure 2-19.

Figure 2-19 Trace the MTP3 Message at A Interface dialog box

NOTE





3. Select the Message Type and set the parameters in the Location area.

l In the Tracing Mode area, select Report. Then click OK. The MTP3 message tracingin Report mode starts. The tracing results are displayed in Figure 2-20.

l In the Tracing Mode area, select Save on GBAM. Then click OK. The MTP3 messagetracing in Save on GBAM mode starts.




Figure 2-20 Traced MTP3 messages on the A interface

Additional Informationl Signaling Network Management

l Signaling Link Test

l SCCP

l TUP (not supported currently)

l ISUP (not supported currently)

l MT: BICC

l Unknown: SS7 and unknown signaling messages (not supported currently)

l L2Changed: traced MTP2 and MTP3 primitives (supported only in tracing-by-link mode)

ExampleOn the BSC Maintenance System, you can double-click an MTP3 message on the A interfaceto view the type of the message and the detailed explanation. See Figure 2-21.



Figure 2-21 An MTP3 message on the A interface


FunctionsDuring MTP2 message tracing on the A interface, the MTP2 messages excluding the Fill InSignal Unit (FISU) message are traced.l Supporting tracing by link. The number of the subrack, slot, and the link are specified.

l Supporting filtering by message type. The messages are the LSSU and the MSU.


navigation tree is displayed.2. Choose Trace > Trace the Message at A Interface > MTP2 Message. The Trace the

MTP2 Message at A Interface dialog box is displayed, as shown in Figure 2-22.




Figure 2-22 Trace the MTP2 Message at A Interface dialog box

NOTE





3. Select the Message Type and set the parameters in the Location area.l In the Tracing Mode area, select Report. Then click OK. The MTP2 message tracing

in Report mode starts. The tracing results are displayed in Figure 2-23.l In the Tracing Mode area, select Save on GBAM. Then click OK. The MTP2 message




Figure 2-23 Traced MTP2 messages on the A interface

Additional Informationl Link Status Signal Unit (LSSU)

l Message Signal Unit (MSU)

ExampleOn the BSC Maintenance System, you can double-click an MTP2 message on the A interfaceto view the type of the message and the detailed explanation. See Figure 2-24.




Figure 2-24 An MTP2 message on the A interface

2.4 Signaling Tracing on the Pb InterfaceThe traced messages on the Pb interface are the application messages and the LAPD messages.

2.4.1 Application Message Tracing on the Pb interfaceThe application message tracing on the Pb interface supports tracing by specified PCUs.

2.4.2 LAPD Message Tracing on the Pb InterfaceDuring LAPD message tracing on the Pb interface, the LAPD messages on the Pb interface aretraced. LAPD message tracing on the Pb interface supports tracing by link.

2.4.1 Application Message Tracing on the Pb interfaceThe application message tracing on the Pb interface supports tracing by specified PCUs.

FunctionsThe functions of the application message tracing on the Pb interface are as follows:

l Supporting tracing by specified PCUs

l Supporting filtering by cell



l Supporting filtering by message type. The messages include the Paging, Confusion, andPacket Circuit Identity Code (PCIC).


navigation tree is displayed.2. Choose Trace > Trace the Message at Pb Interface > Application Message. The Trace

the Application Message at Pb Interface dialog box is displayed, as shown in Figure2-25.

Figure 2-25 Trace the Application Message at Pb Interface dialog box

NOTE


"Report" means to send the traced messages directly to the LMT. You can specify the savingpath of the traced messages in the Saving File area. The file contains all the signaling messageson the Pb interface traced during a specified period of time.



3. Select the Message Type, Location, and Site. Choose a cell in the Candidate Sites areaand add it to the Selected Sites area.l In the Tracing Mode area, select Report. Then click OK. The application message

tracing in Report mode starts. The tracing results are displayed, as shown in Figure2-26.

l In the Tracing Mode area, select Save on GBAM. Then click OK. The applicationmessage tracing in Save on GBAM mode starts.




Figure 2-26 Traced application messages on the Pb interface

Additional Information

l Paging

l PCIC Check

l Confusion

l Other messages on the Pb interface

ExampleOn the BSC Maintenance System, you can double-click an application message on the Pbinterface to view the type of the message and the detailed explanation. See Figure 2-27.



Figure 2-27 An application message on the Pb interface

2.4.2 LAPD Message Tracing on the Pb InterfaceDuring LAPD message tracing on the Pb interface, the LAPD messages on the Pb interface aretraced. LAPD message tracing on the Pb interface supports tracing by link.

FunctionsDuring LAPD message tracing on the Pb interface, the LAPD messages on the Pb interface aretraced. LAPD message tracing on the Pb interface supports tracing by link.


navigation tree is displayed.2. Choose Trace > Trace the Message at Pb Interface > LAPD Message. The Trace the

LAPD Message at Pb Interface dialog box is displayed, as shown in Figure 2-28.




Figure 2-28 Trace the LAPD Message at Pb Interface dialog box

NOTE


"Report" means to send the traced messages directly to the LMT. You can specify the savingpath of the traced messages in the Saving File area. The file contains all the signaling messageson the Pb interface traced during a specified period of time.



3. Set the parameters in the Mode Selection area.l In the Tracing Mode area, select Report. Then click OK. The LAPD message tracing

in Report mode starts. The tracing results are displayed, as shown in Figure 2-29.l In the Tracing Mode area, select Save on GBAM. Then click OK. The LAPD message




Figure 2-29 Traced LAPD messages on the Pb interface

Additional Informationl Packet Control Unit (PCU)

l PCU-BSC Signaling Link (Pbsl)

ExampleOn the BSC Maintenance System, you can double-click a LAPD message on the Pb interfaceto view the type of the message and the detailed explanation. See Figure 2-30.




Figure 2-30 A LAPD message on the Pb interface

2.5 Signaling Tracing on the BSC-CBC InterfaceDuring signaling tracing on the BSC-CBC interface, the signaling messages on the interfacebetween the BSC and the CBC are traced.

FunctionsDuring signaling tracing on the BSC-CBC interface, the signaling messages on the interfacebetween the BSC and the CBC are traced.


navigation tree is displayed.2. Choose Trace > Trace the Message at BSC-CBC Interface. The Trace the Message at

BSC-CBC Interface dialog box is displayed, as shown in Figure 2-31.



Figure 2-31 Trace the Message at BSC-CBC Interface dialog box

NOTE


"Report" means to send the traced messages directly to the LMT. You can specify the savingpath of the traced messages in the Saving File area. The file contains all the signaling messageson the BSC-CBC interface traced during a specified period of time.



3. In the Tracing Mode area, select Report. Then click OK. The BSC-CBC message tracingin Report mode starts. The tracing results are displayed, as shown in Figure 2-32.




Figure 2-32 Traced messages on the BSC-CBC interface


ExampleOn the BSC Maintenance System, you can double-click a message on the BSC-CBC interfaceto view the type of the message and the detailed explanation. See Figure 2-33.



Figure 2-33 A message on the BSC-CBC interface

2.6 Signaling Tracing of a BSC UserSignaling tracing of a BSC user supports tracing by the IMSI, TMSI, IMEI, MSISDN, andchannel identifier.

FunctionsThe functions of the signaling tracing of a BSC user are as follows:l Supporting tracing by the IMSI, TMSI, IMEI, MSISDN, and channel identifier

l Supporting filtering by interface. The interfaces are the A interface, Abis interface, and theUm interface.


navigation tree is displayed.2. Choose Trace > Trace User Message. The Trace User Message dialog box is displayed,

as shown in Figure 2-34.




Figure 2-34 Trace User Message dialog box

NOTE


"Report" means to send the traced messages directly to the LMT. You can specify the savingpath of the traced messages in the Saving File area. The file contains all the user messages tracedduring a specified period of time.



3. Set the parameters in the Interface Type area.l In the Tracing Mode area, select Report. Then click OK. The user message tracing in

Report mode starts. The tracing results are displayed, as shown in Figure 2-35.l In the Tracing Mode area, select Save on GBAM. Then click OK. The user message




Figure 2-35 Traced user messages

Additional Informationl International Mobile Subscriber Identity (IMSI)

l Temporary Mobile Station Identity (TMSI)

l Mobile Station International ISDN Number (MSISDN)

l International Mobile Station Equipment Identity (IMEI)

ExampleOn the BSC Maintenance System, you can double-click a user message to view the type of themessage and the detailed explanation. See Figure 2-36.




Figure 2-36 A BSC user message



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