Guide to Obtaining BTS3900 Information(V1.0.2)
May 5, 2017 | Author: Hoyekunley | Category: N/A
Short Description
Guide to Obtaining BTS3900 Information...
Description
Guide to Obtaining BTS3900 Information
Product Name BTS3900 Product Version
Confidentiality Level
Confidentiality Level INTERNAL Total 43 Pages
Guide to Obtaining BTS3900 Information
Prepared by
BTS3900 Maintenance Team
Date
Reviewed by
Date
Approved by
Date
2011-03-04
Huawei Technologies Co., Ltd. All Rights Reserved
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Change History Date
2011-04-29
2013-12-9
Revision
CR
Section
Version
ID
Number
Description
Draft completed
Huawei Confidential
Author
Li Lijun
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Content 1 Accessing the BSC OMU.................................................................................................................5 1.1 Querying the Installation Directory of the Main Workspace of the OMU...........................6 1.2 Accessing the OMU by using the File Manager on the Web LMT .....................................6 2 Basic Operations..............................................................................................................................7 2.1 Querying the Custom Message.............................................................................................7 2.2 Querying COM Redirection................................................................................................10 3 Obtaining Common Information....................................................................................................15 3.1 Obtaining the BTS Log.......................................................................................................15 3.2 Obtaining the Board Log.....................................................................................................15 3.3 Obtaining the service logs of a TRX...................................................................................16 3.4 Obtaining Data Configuration (CFGMML).......................................................................17 3.5 Obtaining Inner Data Configuration (CFGMML)..............................................................18 3.6 Obtaining History Alarms of the BSC................................................................................19 3.7 Obtaining the Operation Log..............................................................................................20 3.8 Obtaining the Original Traffic Measurement File..............................................................22 3.9 Enabling the Single Pass Check Function..........................................................................23 3.10 Obtaining the Single Pass Log..........................................................................................23 3.11 SCP Mail Trace..................................................................................................................25 3.12 Obtaining Net List Information(Net)................................................................................26 3.13 Performing DSP Recording...............................................................................................27 3.14 Performing PD Recording.................................................................................................28 3.15 Performing TC Recording.................................................................................................29 3.16 Performing Uplink Frequency Scanning..........................................................................31 3.17 Querying Forward Power and Reverse Power..................................................................35 3.18 Querying the Interference Band........................................................................................38 3.19 Querying the GTMU A/B Board.......................................................................................39 3.20 Querying the RRU V1/V2 Module...................................................................................41 3.21 Querying the RFU V1/V2 Module...................................................................................41 3.22 Querying the Mapping Between Internal TRX Number and External TRX Number......42 3.23 Obtaining the Failure Log.................................................................................................43 3.24 Obtaining the TMU Alarm Log........................................................................................43 3.25 Tracing the CBUS2 Message............................................................................................44 3.26 Tracing the CBUS3 Message............................................................................................44 3.27 Single User Resource Check.............................................................................................45 3.28 Querying Information About the BTS Port Timeslot Distribution...................................46 3.29 Querying Version NO. and Internal Version NO..............................................................47 3.30 Obtaining CFG MML of single BTS................................................................................48 3.31 Obtaining Signaling..........................................................................................................49 4 Performing Related Operations......................................................................................................58 4.1 Performing Loopback Tests................................................................................................58 2013-12-9
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4.2 Modifying the BTS Soft Parameters...................................................................................63 4.3 Reducing the Interference Band Software Parameters......................................................63
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1 Accessing the BSC OMU The following figure shows the structure of the OMU directory:
XPU RUN log DSP RUN message DEBUG/GCSR/GPSR/GCHR/UCHR log
Alarm log
Operation log
Configure files
PMF
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1.1
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Querying the Installation Directory of the Main Workspace of the OMU
You can run the LST OMUAREA command to query the workspace of the OMU and the current running version.
1.2
Accessing the OMU by using the File Manager on the Web LMT
Click File Manager. The following window is displayed:
Note: The File Manager can show a maximum of 1,000 pieces of data. If the number of files in the directory exceeds 1,000, some log files may not be displayed. Therefore, you must use other methods to obtain required information.
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2 Basic Operations 2.1
Querying the Custom Message
(1) Start the BSC6900, enter the super user mode, and click About.
(2) Click 0, 3, 1, 4, 2, and 0 in sequence.
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(3) Choose Device Maintenance > BTS Maintenance > Internal Maintenance > Custom Message.
(4) The Custom Message window is displayed. Specify Site and Message Type. 2013-12-9
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(5) Send a transparent transmission command of a custom message. The custom message may be as follows: D4-00-FF-FF-FF-81-00-FF-01-35
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(6) Query the current cell number and TRX number: (1) Run the LST GCELL command to query the current cell number
(2) Run the LST GTRX command to query the TRX number
2.2
Querying COM Redirection
(1) Click About at the upper right corner of the BSC LMT.
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(2) Click 0, 3, 1, 4, 2, and 0 in sequence.
(3) Click BTS Maintenance and choose Internal Maintenance > COM Redirection.
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(4) On the COM Redirection page, specify Site and set Message Type to Transparent.
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(5) In the Custom Message text box, send a redirStart message to redirect the COM port of the TMU. An OK dialog box is displayed. (7) Send the following two messages to redirect the COM port of the RRU. iSend2TrxShell "redirStart",0 iSend2TrxShell "redirRestart",0
(0 is the board number) (0 is the board number)
(8) Right-click a target board and choose Query Board Information from the shortcut menu to query the board number.
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The following figure shows the queried board number.
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3 Obtaining Common Information 3.1
Obtaining the BTS Log
(1) Run the STR BTSLOG command to obtain the BTS log. Specify BTS Index and set Board Type to TMU(TMU/DTMU).
(2) After the command is executed completely, click File Manager, choose a log file from the directory
\\bam\version_a\ftp\bts\btscmplog
(When
BSC6900
version
is
R11)
or
\\bam\common\ftp\bts\btscmplog（When BSC6900 version is R12（, and click Download.
3.2
Obtaining the Board Log
(1) Run the STR BTSLOG command to obtain log information and specify BTS Index, Board 2013-12-9
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Type, and Board No.
(2) After the command is executed completely, click File Manager, choose a log file from the directory \\bam\version_a\ftp\bts\btscmplog, and click Download.
3.3
Obtaining the service logs of a TRX
(1) Run the STR BTSLOG command to obtain log information and specify BTS Index, Board Type, and Board No. Here, set Command Parameter to mfs:/GSMLOG/GSMLOGS.lps. (2) After the command is executed completely, click File Manager, choose a log file from the directory \\bam\version_a\ftp\bts\btscmplog, and click Download.
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3.4
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Obtaining Data Configuration (CFGMML)
(1) Run the EXP CFGMML command to export the current configuration file.
(2)
Click
File
Manager,
choose
a
log
file
from
the
directory
\\bam\version_a\ftp\export_cfgmml, and click Download.
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Note: The rules for naming files (if no file name is specified) are as follows: For example: CFGMML-BSC0-20091202184237.zip CFGMML BSC0 2009 12 02 18 42 37 .zip CFGMML + BSC0 + year + month + day + hour + minute + second + suffix of the file name
3.5
Obtaining Inner Data Configuration (CFGMML)
(1) Use the following MML command EXP INNERCFGMML:;
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(2)
Click
File
Manager,
choose
a
log
file
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from
the
directory
\\bam\version_a\ftp\export_cfgmml, and click Download.
3.6
Obtaining History Alarms of the BSC
(1) On the Web LMT, click Alarm, specify Alarm Type and Alarm Severity, and set Return Amout to 4000 and Filter By BTS to a target site. Then, click Query.
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(2) After the alarms are filtered successfully, right-click an alarm and choose Save All from the shortcut menu to save the result in the .csv format.
3.7
Obtaining the Operation Log
(1) Run the COL LOG command and set Log File Type to OPT_LOG.
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The rules for processing time are as follows: If Start Time and End Time are not set, logs recorded from the earliest time to the latest time are exported by default. If Start Time is set but End Time is not set, all logs recorded from the start time to the latest time are exported. If Start Time is not set but End Time is set, logs recorded from the earliest time to the end time are exported. (2)
Click
File
Manager
and
find
the
OperateLog.zip
file
from
the
directory
\\bam\version_a\ftp\COLLOGINFO\OPT-LOG\.
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3.8
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Obtaining the Original Traffic Measurement File
Click File Manager and obtain the traffic measurement file from the directory \\bam\common\MeasResult.
The rules for naming files are as follows: A date.start time + time zone – end time + time zone period flag
date start time time zone end time period flag Period calculation: end time – start time = traffic measurement period Period flag: Traffic measurement in a common period: EMS-NORMAL
traffic measurement for 30
minutes or 60 minutes A20100915.0300+0800-0400+0800_EMS-NORMAL.mrf.bz2 A20101126.1330+0800-1400+0800_EMS-NORMAL.mrf.bz2
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Traffic measurement in a short period: EMS-SHORTPERIOD
traffic measurement for 15
minutes, 5 minutes, or 1 minute. A20100811.0000+0100-0015+0100_EMS-SHORTPERIOD.mrf.zip A20100811.0000+0100-0015+0100_EMS-SHORTPERIOD.mrf.zip Traffic measurement of 24 hours: A20100916.0000+0800-0000+0800_EMS-1440.mrf.bz2 Note: You can extract only the traffic measurement files of the EMS-NORMAL type because the traffic measurement period of the frequently used original file is 60 minutes.
3.9
Enabling the Single Pass Check Function
Run the SET GCELLSOFT command to enable the single pass check function and specify parameters.
3.10 Obtaining the Single Pass Log (1)
Click
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single
pass
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log
is
stored
in
the
directory
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\\bam\common\fam\famlogfmt, and the prefix of the single pass log is [CDIG].
(2) The following table lists the formats for recording log file names:
Item
Serial Number
1
Single pass time (format: YYYYMMDDHHMMSS)
2
Single pass check point 0: Uplink single pass 1: Downlink single pass
3
Single pass check result 0: No single pass 1: Single pass 2: Crosstalk
4
Total number of frames checked during the primary single pass check
5
Percentage of bad frames to checked frames
6
Site number, cell number, TRX number, and channel number of the call
7
Phone number (or TMSI/IMSI) being called and phone number (or TMSI/IMSI) of the peer party (record the called number and the TMSI or IMSI information of the calling MS when the current call is an outgoing call; record the calling number and the TMSI and IMSI information of the called MS when the current call is an incoming call), and record the phone number and IMSI/TMSI if they exist.
8
Transmission mode of the Abis interface 0: TDM
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1: IP 2: HDLC 9
Subrack number, slot number, port number, timeslot number, and sub timeslot number of the Abis interface board occupied by the current call, IP address and port of the Abis interface board (recorded if the Abis interface is based on IP), HDLC port, and sub port (recorded if the Abis interface uses HDLC for transmission)
10
Subrack number, slot number, port number, timeslot number, and sub timeslot number of the GEIUT of the BM subrack (not required when the TC subrack and the BM subrack are integrated)
11
Subrack number, slot number, port number, timeslot number, and sub timeslot number of the GEIUT of the TC subrack (not required when the TC subrack and the BM subrack are integrated)
12
Subrack number, slot number, DSP number, and DSP timeslot number of the DPU
13
CIC number of the A interface
14
Group number of the DPC
15
DTX switch (uplink and downlink switches)
16
Service type
3.11 SCP Mail Trace (1) Run the following two commands to redirect the COM port to the local end. iSend2TrxShell "redirStart",0 iSend2TrxShell "redirRestart",0 The value 0 is the board number Set the board number according to the actual condition.
(2) Trace the mail message. //Open the downlink trace iSend2TrxShell "MAILBOX_OpenDownTrace",0
//Close the downlink trace iSend2TrxShell "MAILBOX_CloseDownTrace",0
//Open the uplink trace iSend2TrxShell "MAILBOX_OpenUpTrace",0
//Close the uplink trace iSend2TrxShell "MAILBOX_CloseUpTrace",0 The value 0 is the board number Set the board number according to the actual condition.
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3.12 Obtaining Net List Information(Net) (1) Run the DSP BTSNET command to query the TMU net list and set NET Object Type to TMU Net.
(2) Run the DSP BTSNET MML command to query the BTS upper-layer net list, set NET Object Type to TRX, and choose a target site.
(3) Query the lower-layer net list of the BTS by sending custom messages. Open the Custom window, set Message Type to Transparent, and send the following command to transparently transmit custom messages to the remote end: D4-00-FF-FF-FF-81-00-FF-01-35 Then, send the following custom messages: D4-00-ff-ff-ff-81-00-ff-05-99-01-00-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-01-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-02-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-03-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-08-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-09-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-0A-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-0B-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-0C-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-0D-00-ff 2013-12-9
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D4-00-ff-ff-ff-81-00-ff-05-99-01-0E-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-0F-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-10-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-11-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-12-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-13-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-14-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-15-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-16-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-17-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-18-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-19-00-ff D4-00-ff-ff-ff-81-00-ff-05-99-01-1A-00-ff Save the query results in .txt files and send the files to R&D engineers.
3.13 Performing DSP Recording DSP recording must be tested when the tested MS is in a conversation process. (1) Run the SET UMRECORDPARA command, specify TRXID and CHNO according to the data found in section 3.24 "Single User Resource Check", and set SUBCHNO to the channel occupied by the call, that is, FULLRATEORPDCH, HALFRATE0 , or HALFRATE1. SET
UMRECORDPARA:
TRXID=468,
CHNO=3,
UMRECCMDCODE=STARTREC,
SERVICETYPE=CS,
SUBCHNO=FULLRATEORPDCH,
RECDIR=DLONLY,
RECMAXTIME=20; (2) After the recording is completed, run the SET UMRECORDPARA command and specify UMRECCMDCODE to STRULDRECDATA. View the progress, and after the progress reaches 100%, perform Step 3. An example of the command is as follows: SET UMRECORDPARA: UMRECCMDCODE=STRULDRECDATA, TRXID=468; (3) Run the STR BTSLOG command, set Log Type to CMPLOG and Index Type to BYID, and enter mfs:/DSPTRAU in Command Parameter. View the progress, and after the progress reaches 100%, perform Step 4. 2013-12-9
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(5) After all the preceding steps are completed, search the path \\mbsc\bam\version_a or version_b)\ftp\bts\log\btscmplog for compressed logs whose names are similar to the name of the recording BTS. (6) Run the RMV CALLRESRECORD command to delete all records. RMV CALLRESRECORD: RECINDEX=0;
3.14 Performing PD Recording （1（Start PD recording Use the following MML command: SET
UMRECORDPARA:
UMRECCMDCODE=STARTREC,
SERVICETYPE=PS,
TRXID=1850, CHNO=3, RECDIR=BIDIR, RECLINECNT=ALLLINK, RECMAXTIME=5; （2（ Stop PD recording SET UMRECORDPARA: UMRECCMDCODE=STOPREC, TRXID=1850; （3（ Collect record data to Flash SET UMRECORDPARA: UMRECCMDCODE=STRULDRECDATA, TRXID=1850; （4（ Stop collect record data to Flash SET UMRECORDPARA: UMRECCMDCODE=STPULDRECDATA, TRXID=1850; （5（Collect BTS log STR BTSLOG: LOGTYPE=CMPLOG, IDTYPE=BYID, BTSID=18, SDATE=2011&07&15, STIME=18&15&36,
EDATE=2011&07&15,
ETIME=18&15&38,
BRDTYPE=GRRU,
BRDNO=1, SUBCMD="mfs:/DSPTRAU"; （6（Collect log file After all the preceding steps are completed, search the path \\mbsc\bam\version_a or 2013-12-9
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version_b)\ftp\bts\log\btscmplog for compressed logs whose names are similar to the name of the recording BTS.
(7) Run the RMV CALLRESRECORD command to delete all records. RMV CALLRESRECORD: RECINDEX=0;
3.15 Performing TC Recording Before performing a call test, specify parameters related to TC recording. The setting method is as follows: （1（ Run the ADD CALLRESRECORD command to add a recording point. An input window is displayed. Set the related parameters. Perform TC recording for both the calling party and the called party. ADD
CALLRESRECORD:
RECINDEX=0,
MSISDN="13908881006", RECORDTYPE=TC; ADD
CALLRESRECORD:
(calling party)
RECINDEX=1,
MSISDN="13908881005", RECORDTYPE=TC;
USERIDTYPE=BYMSISDN,
USERIDTYPE=BYMSISDN,
(called party)
Note: All commands of the function are internal commands and are not described in the help document.
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unique index. USERIDTYPE includes four values, as described in the following table:
TMSI
Temporary mobile subscriber identity
Indicates the TMSI of an MS. Value range on the interface: 0–4294967295 Actual value range: 0–4294967295 Unit: none Default value: none Recommended value: none
IMSI
International mobile subscriber identity
Indicates the value of the IMSI. Value range on the interface: none Actual value range: 1–15 characters Unit: none Default value: none Recommended value: none
MSISDN Mobile station international ISDN number
Indicates the value of the MSISDN. Value range on the interface: none Actual value range: 1–32 characters Unit: none Default value: none Recommended value: none
IMEI
International mobile equipment identity
Indicates the value of the IMEI. Value range on the interface: none Actual value range: 1–15 characters Unit: none Default value: none Recommended value: none
Note: Because recording of up to four MSs can be performed simultaneously under the BSC, the value of RECINDEX ranges from 0 to 3. If the message "The data to be added conflicts with the existing data" is displayed when the command is executed, it indicates that the number of recording MSs reaches the maximum value. In this case, you can run the following command to 2013-12-9
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delete the previous recording: RMV CALLRESRECORD: RECINDEX=0;
(Specify RECINDEX according to the actual
condition)
(2) Perform dialing tests and call tests. After all call tests are completed, extract the TC recording file from the directory \\mbsc\bam\common\fam\tc_file. Querying Version NO. In the panel of “BTS Device Panel” （ Select the target TMU board or TRX board （ right click“Query Board Information”（appear the following picture, select“Basic Information”（you can query the Version NO. in ”Software version”, For example:V100R012C00SPC039（
2> Querying Internal Version NO. In the panel of “BTS Device Panel”（Select the target TRX board（right click“Query Board Information” （ appear the following picture, select ”Running Parameters” （ you can query the
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Internal Version NO. in ”Software version”, For example: 13.394.10.009.
3.30 Obtaining CFG MML of single BTS Execute the following MML command in “Batch” window: exp btsmml:BTSIDLIST="0";
//“0”is BTSID
The output file is stored in the directory \\bam\version_a\ftp\export_cfgmml.
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3.31 Obtaining Signaling 3.31.1 Tracing Signaling over the A Interface
You can trace the A interface BSSAP message, A interface MTP3 message, A interface MTP2 message, A interface SCCP message, A interface SCTP message, and A interface M3UA message. Click Trace on the LMT to open the Trace tab. In Trace Navigation Tree, choose Trace > GSM Services and double-click A Interface Trace.In the A Interface Trace dialog box, specify parameters on the Basic tab, then specify parameters on the tab corresponding to the type of the signaling to be traced, and click Submit. The traced message is displayed.
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3.31.2 Tracing CS Signaling over the Um Interface
You can trace layer-3 signaling messages on the CS Um interface and trace the messages by TRX and cell. You can trace the Um interface messages in up to 16 cells. Click Trace on the LMT to open the Trace tab. In Trace Navigation Tree, choose Trace > GSM Services and double-click Um Interface CS Trace. In the Um Interface CS Trace dialog box, specify parameters and click Submit.The traced message is displayed.
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3.31.3 Tracing PS Signaling over the Um Interface
You can trace various PS Um interface messages, including the DUMMY message, system message, dummy paging message, and data block message. Click Trace on the LMT to open the Trace tab. In Trace Navigation Tree, choose Trace > GSM Services and double-click Um Interface PS Trace.In the Um Interface PS Trace dialog box, specify parameters and click Submit.The traced message is displayed.
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3.31.4 Tracing CS Signaling over the Abis Interface
You can trace various CS Abis interface signaling messages, including the Abis interface RSL message, Abis interface ESL message, Abis interface EML message, Abis interface OML message, and Abis interface LAPD message. 2013-12-9
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Click Trace on the LMT to open the Trace tab. In Trace Navigation Tree, choose Trace > GSM Services and double-click Abis Interface CS Trace. In the Abis Interface CS Trace
dialog box, specify parameters on the Basic tab, then specify parameters on the tab corresponding to the type of the signaling to be traced, and click Submit. The traced message is displayed. (1) The following figures show the process of tracing OML messages:
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(2) The following figures show the process of tracing RSL messages:
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3.31.5 Tracing PS Signaling over the Abis Interface You can trace PS Abis interface signaling messages and trace the messages by TRX and cell. Click Trace on the LMT to open the Trace tab. In Trace Navigation Tree, choose Trace > GSM Services and double-click Abis Interface PS Trace.In the Abis Interface PS Trace dialog box, specify parameters and click Submit.The traced message is displayed.
3.31.6 Tracing CS Signaling of a Single User You can trace the A/Abis/Um standard interface signaling messages of specified users. You can use the IMSI, IMEI, TMSI, MSISDN, CELLID, or channel to specify the traced users. Single user CS trace enables you to differentiate different user signaling by call number and locate problems effectively. In the single user CS trace, you can choose CDT Mode to trace internal signaling and locate signaling problems more accurately. You can trace the signaling of all single users in up to 16 cells and differentiate the signaling of each user by call number. Click Trace on the LMT to open the Trace tab. In Trace Navigation Tree, choose Trace > GSM Services and double-click Single User CS Trace. In the Single User CS Trace dialog box, specify parameters and click Submit.The traced message is displayed.
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If you set Trace Object Symbol Type to MSISDN, you must set MSISDN to the peer number. (1) (Recommended) If the calling user is traced, MSISDN indicates the called number. For example, if the user dials 12345, MSISDN must be set to 12345. (2) If the called user is traced, MSISDN indicates the calling number. For example, if the calling number displayed on the called MS is 54321, MSISDN must be set to 54321. If you set Trace Object Symbol Type to TMSI or IMSI, you must confirm the reallocation policy of the MSC as follows: (1) If the MS initiates a TMSI call, the TMSI tracing function can be enabled. (2) If the MS initiates an IMSI call, the IMSI tracing function can be enabled. If you set Trace Object Symbol Type to IMEI, you must confirm whether the MSC has enabled the function of obtaining the IMEI.
3.31.7 Tracing PS Signaling of a Single User You can trace the Gb/Abis/Um standard interface messages of specified users and internal messages or Um data blocks. You can use the IMSI or TLLI to specify the traced users. Click Trace on the LMT to open the Trace tab. In Trace Navigation Tree, choose Trace > 2013-12-9
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GSM Services and double-click Single User PS Trace. In the Single User PS Trace dialog box, specify parameters and click Submit.The traced message is displayed. You can choose Trace Um Datablock Message only when Trace Interface Type is set to UM Interface. If you set Trace Object Symbol Type to IMSI, you must confirm the reallocation policy of the MSC: If the MS initiates an IMSI call, the IMSI tracing function can be enabled. If you set Trace Object Symbol Type to TLLI, you must first run the DSP MSCONTEXT command to view the TLLI value of the MS that is in the PS service process. When the MS is in the PS service process, the TLLI may be reallocated. In this case, you can continue the query to obtain a new TLLI and continue the tracing.
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4 Performing Related Operations 4.1
Performing Loopback Tests
4.1.1
Performing Interface Board Port Timeslot Loopback
You can perform interface board port timeslot loopback on any one of the following boards: GE(O)IUA, GE(O)IUB, GE(O)IUT, and GE(O)IUP. There are two loopback modes: remote loopback and local loopback. Remote loopback: The signal received in the timeslot is not processed but directly sent out in the TX direction of the timeslot. During the loopback, the interface board still continues to receive the signal sent in the timeslot. Local loopback: The signal that needs to be sent in the timeslot is not sent out but directly taken back in the RX direction of the timeslot. During the loopback, the interface board still continues to receive the signal sent in the timeslot. Abis interface board timeslot loopback is frequently used in voice troubleshooting. A interface timeslot loopback can be replaced by external voice loopback. The procedure for performing interface board port timeslot loopback is as follows: (1) Click Device Maintenance, choose BSC Maintenance > Interface Board Port Timeslot Loopback, and specify Subrack No. and Slot No. (2) Click Query, select the timeslot number to be looped back, and click Start.
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Note: During the Abis /Ater interface board timeslot loopback, you must set the loopback timeslot correctly. You can calculate the E1 timeslot by using the timeslot queried in section 3.24 "Single User Resource Check".
4.1.2
Performing BTS Voice Loopback
You can perform the BTS voice loopback test on a traffic channel to verify whether the voice channel of the TRX from the air interface to the internal DBUS of the BTS is connected normally. During the test, the TMU board loops back the DBUS timeslot corresponding to the tested voice channel and the connection can be checked according to whether the users occupying the channel can hear their own voices. If the users can hear their own voices, the connection is normal; otherwise, the connection is abnormal. After a voice problem such as noise occurs, a BTS voice loopback test can be performed. If the users can hear noise, the voice problem may be located in the downlink direction of the Abis interface; otherwise, the voice problem is located in the uplink direction of the Abis interface. The procedure for performing BTS voice loopback is as follows: (1) Click Device Maintenance, choose BTS Maintenance > Maintain TRX > Test Channel 2013-12-9
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Loopback, specify Site, Cell, TRX No., and Channel, and set Test Project to BTS Voice Loop Test. (2) Read the three precautions in Description, specify Duration, and click Start to perform the test.
Note: You can set TRX No. and Channel to the TRX number and channel number queried in section 3.24 "Single User Resource Check".
4.1.3
Performing TRX Voice Loopback
You can perform the TRX voice loopback test on a traffic channel to verify whether the voice channel of the TRX from the air interface to the codec of the baseband DSP is connected normally. During the test, the baseband DSP directly encodes the decoded data of the traffic channel and sends the data out, and the connection can be checked according to whether the users occupying the channel can hear their own voices. If the users can hear their own voices, the loopback is correct. 2013-12-9
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After a voice problem, such as noise, occurs, a TRX voice loopback test can be performed. If the users can hear noise, the voice problem may be located in the downlink direction of the DBUS (and TRX); otherwise, the voice problem is located in the uplink direction of the TRX. The procedure for performing TRX voice loopback is similar to the procedure for performing BTS voice loopback. The procedure for performing TRX voice loopback is as follows: (1) Click Device Maintenance, choose BTS Maintenance > Maintain TRX > Test Channel Loopback, specify Site, Cell, TRX No., and Channel, and set Test Project to TRX Voice Loop Test. (2) Read the three precautions in Description, specify Duration, and click Start to perform the test.
4.1.4
Performing BIU Loopback
You can perform the BIU loopback test on only idle channels. On the LMT, choose BTS Maintenance > Maintain TRX > Test Channel Loopback and specify Site, Cell, TRX No., and Channel. Set Test Project to BIU Loop Test. Click Start to perform the test. After the test is
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complete, the test results are returned.
Note: You must perform BIU loopback on all channels of the target TRX, four times per channel. The loopback test results are returned in a table. An example of the loopback test results is listed as follows: Loopback Mode/Test MS
MS A at a Problem Site
MS B at a Normal Site
Local
Interface
Cannot hear A and B
Can hear A and B
Interface
Can hear A but cannot hear
Can hear A but cannot
Loopback
B
hear B
BTS Loopback
Can hear A and B
Cannot hear A and B
TRX Loopback
Cannot hear A but can hear
Cannot hear A but can
B
hear B
Abis
Loopback Remote
Abis
Note: Prepare the table for recording test results before the test. To ensure the accuracy of test results, 2013-12-9
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perform each loopback for at least four times.
4.2
Modifying the BTS Soft Parameters Run the SET GCELLBTSSOFT command to modify the BTS software parameters. For
example, SET GCELLBTSSOFT: IDTYPE=BYID, CELLID=112, ITEMINDEX=39, ITEMVALUE=254;
4.3 Reducing the Interference Band Software Parameters No help or auxiliary information about modifying the software parameters of the cell can be obtained from the Web LMT because the BSC hides the command for modifying the software parameters of the cell. The procedure for modifying the interference band software parameters is as follows: 1> Open the MML window. 2> Use 200K filter bandwidth to calculate the interference band of the MRFU V2. Run the following command in the MML window or batch processing window: SET GCELLBTSSOFT: IDTYPE=BYID, CELLID=Cell index value, ITEMINDEX=56, ITEMVALUE=127;
Note: Bit 7 of software parameter 56 indicates that the 200K filter switch is used to calculate the interference band of the MRFU V2. If bit 7 is set to 0, the switch is enabled. If bit 7 is set to 1, the switch is disabled. When the software parameter is used, you need to query the value of the software parameter before setting the software parameter because each bit has its own 2013-12-9
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meaning. In this way, other function switches will not be affected when this function is enabled. LST GCELLBTSSOFT: IDTYPE=BYID, CELLID=Cell index value; After the bit occupation of the software parameter is determined, set bit 7 to 0 to recalculate the value of the software parameter. If the queried value of software parameter 56 is 223, namely 0xDF (corresponding to the binary code 11011111), bit 5 has been set to 0. In this case, the 200K filter bandwidth switch BIT7 must be enabled, namely, bit 7 must be set to 0. Therefore, the recalculated value of software parameter 56 is 0x5F, namely 95. SET GCELLBTSSOFT: IDTYPE=BYID, CELLID=Cell index value, ITEMINDEX=56, ITEMVALUE=95;
3> Select an interference band reporting combination algorithm (applicable to all modules except MRRU V2): SET GCELLBTSSOFT: IDTYPE=BYID, CELLID=Cell index value, ITEMINDEX=59, ITEMVALUE=239; Note: Bit 5 and bit 4 of software parameter 59 indicate the interference band reporting combination algorithm. When the two bits are set to 10, it means selecting the average value. When the two bits are set to 01, it means selecting the minimum value. When the two bits are set to 00 or 01, it means selecting the maximum value. The default value is 11. The following table shows the details. BIT5
BIT4
Algorithm
1
1
The maximum value of each antenna is used in interference band reporting by default.
1
0
The average value of each antenna is used in interference band reporting.
0
1
The minimum value of each antenna is used in interference band reporting.
0
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0
The maximum value of each antenna is used in
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interference band reporting. When the software parameter is used, you need to query the value of the software parameter before setting the software parameter because each bit has its own meaning. In this way, other function switches will not be affected when this function is enabled. LST GCELLBTSSOFT: IDTYPE=BYID, CELLID=Cell index value; After the bit occupation of the software parameter is determined, set bit 5 and bit 4 to the corresponding value to recalculate the value of the software parameter. [Example] The value of software parameter 59 queried above is 254, namely, 0xDF, and bit 5 is already 0. In this case, the average value must be used in interference band reporting, namely, bit 5 and bit 4 must be set to 10. Therefore, the recalculated value of software parameter 59 is 0xEE, namely, 238. SET GCELLBTSSOFT: IDTYPE=BYID, CELLID=Cell index value, ITEMINDEX=59, ITEMVALUE=238;
4> Set the interference band reduction factor (applicable to all modules except MRRU V2): SET GCELLBTSSOFT: IDTYPE=BYID, CELLID=Cell index value, ITEMINDEX=19, ITEMVALUE=255; Bit 5 to bit 2 of software parameter 19 indicate a reduction factor. The value 1111 is the default value and the factor is not used. 1010–1110 are invalid values and can be normalized to 1001, namely, reducing 9 dB. The following table lists the possible parameter values:
BIT5 BIT4 BIT3 BIT2 0 0 0 0 0 0 0 0 2013-12-9
0 0 0 1
0 1 1 0
Meaning Reducing 0
1
dB Reducing 1
0
dB Reducing 2
1
dB Reducing 3
0
dB Reducing 4
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0 0 0 1 1 1 1 1 1 1 1 （（1（
1 1 1 0 0 0 0 1 1 1 1
0 1 1 0 0 1 1 0 0 1 1
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1
dB Reducing 5
0
dB Reducing 6
1
dB Reducing 7
0
dB Reducing 8
1
dB Reducing 9
0 1 0 1 0 1
dB Invalid Invalid Invalid Invalid Invalid Invalid
To reduce the interference band by 3 dB when bit 5 to bit 2 of software parameter 19 are set to 0011, run the following command: SET
GCELLBTSSOFT:
IDTYPE=BYID,
CELLID=Cell
index
value,
ITEMINDEX=19, ITEMVALUE=204;
Note: The following command for modifying the IF filter bandwidth affects the performance of the service and is not recommended when being used to reduce the interference band. 5> Run the following command to modify level-1 filter bandwidth for the MRFU V1/MRRU V1: SET GCELLBTSSOFT: IDTYPE=BYID, CELLID=Cell index value, ITEMINDEX=91, ITEMVALUE=251; Software parameter 91 is set to 255 by default. For the M series and D series, different bits are used to configure the IF filter. The method for configuring IF filters of M series and the meanings of bits are as follows Bit 0 of software parameter 91 has other purposes. Bit 2 and bit 1 are used to configure the 2013-12-9
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coefficient of the IF filter. The following table lists the meanings of bit 2 and bit 1. BIT2-BIT1
00
01
10
11
Filter
260K
200K
Reserved
260K
bandwidth
6> Run the following command to modify level-1 filter bandwidth for the DRRU/DRFU: SET GCELLBTSSOFT: IDTYPE=BYID, CELLID=Cell index value, ITEMINDEX=91, ITEMVALUE=239; Bit 4 and bit 3 of software parameter 91 are used to configure the coefficient of the IF filter. The following table lists the meanings of bit 4 and bit 3.
BIT4-BIT3 Filter
00 260K
01 200K
10 Reserved
11 200K
bandwidth Note: 1. When the IF filter coefficients of D series and M series are configured, use different bits of the same software parameter. The default values (10 and 11) in the IF filter coefficient configuration of D series and M series are different. The default value of D series is 200K bandwidth, and the default value of M series is 260K bandwidth. The reserved value 10 cannot be configured.
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