gsm o&m solution v1.1

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

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• Basic Information• Audience ： Customer Maintenance Dept., GTS, R&D Maintenance Dept.• Time ： 30 minutes • Contact ： Gao Shuliang/00036428 liusenlin/00054251 • Version ： V1.1 (20110528)

• Main Opinion Challenges to network operation and maintenance Huawei operation and maintenance solution


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www.huawei.com

GSM O&M Solution

Easy OM!



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Challenges for O&M of Radio NetworkTroubleshooting: how to identify, isolate and

locate faults quickly

How to isolate the BSS equipment from faults of peripheral NEs

How to identify service quality problems quickly

Network optimization: how to concern and enhance end-user service quality

How to solve end-user complaints quickly and identify

potential complaint users

How to care for VIP customers

How to show the geographical distribution of network KPIs

Routine maintenance: how to realize automatic routine maintenance

How to find and solve network risks before problems happen

How to realize automatic routine maintenance

Focus on challenges for network O&M and develop complete O&M solution



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RF tunnel Troubleshooting

Interference Detection

VSWR Detection

Transmission Troubleshooting

Signaling Plane Troubleshooting

Voice service Troubleshooting

Customer Complaint Analysis

Service Geographical Distribution

Routine Maintenance

Solution

Equipment Health Check

Intelligent Script Development Platform

Basic O&M Solution

O&M documents Alarm Configuration Tools

GSM O&M Solution



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Note: License is not needed

RF Tunnel Troubleshooting

Dow

nlin

k

tunn

el fa

ult

Fault connection between

DDPU/DFCU and TRX


antenna and port on the

top of the BTS

Upl

ink

tunn

el fa

ult

Fault between

DDPU/DFCU and TRX


antenna and port on the

top of the BTSA

nten

nas

faul

t bet

wee

n

cel

lsCrossed pair connection of

antennas between cells

Reverse connection of

antennas between cells

③

①②

③

①②

①②

①②

Identify all abnormal RF connection in the entire network by

analyzing the statistic and engineering parameters

Identify faults efficiently and accurately at remote end

Reduce the requirement of instrument s and experts

MR

Engineering parameters

Handover

statistics

• Analyze data withtools at remote end

• Generate a list of fault sites and fault mode

• Correct the problems according to the list

SolutionStatus quo and problems

Difficult to find fault RF connection. Most of such

faults are found by customers’ complaints.

Need to go to site frequently to find the problem.

Special RF instrument is needed and RF expert

is needed to resolve the fault.BTS3012

BTS3900

RXTX

① ②

③

④


RXUs ④



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Cases of RF Tunnel problems

• Page 6

Case1:Fault connection between RXUs

Case 2: Reverse connection of antennas between cells

There is no overlapping coverage area but handovers exist

between cell A and eight cells. The antenna feeder of the

cells in the same BTS may be inversely connected.

Main antenna level of TRXs in one RXU is 12db

greater than diversity antenna level indicates that

there is fault connection between RXUs.

Analyze with tools at

remote end

Collect traffic measurement

1 2

Output fault list

3

Confirm on site

4

Analyze with tools at a

remote end

Collect engineering parameters and

handover measurement

1 2

Output the list of faults

3

Confirm on site

4

Faults can be located automatically with tools at remote end and confirmed quickly on site.

A

Cells with totally different coverage

Source cellFault connection between RXUs



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Note: License is not needed.

Status quo and problems

Depend on expensive instruments.

Much time and manpower are

needed to solve the problems.

Identify all interferences in the entire network and

display the results with one-MML

Applicable for both project and maintenance

scenario

BSS13.0 solution

Observe the changes of interference band after idle

burst test to determine if inter-modulation interference

exists

CDMA Inter-

modulation

interference

Compare RxLevel of

working frequencies

Adjust TMA diminution

factor

1 2Display

fault cells list

3

Identify on site

4

Observe change of

interference band

Start in idle burst test

1 2

Output list of cells with interference

3

Identify interference

at site

4

Inter-

modulation

interference

BSS8.1 solution

If the interference becomes more severe after power transmission, it indicates inter-modulation.

Check results of the

test

Perform online inter-modulation test for the entire network in LMT

1 2

Confirm on site

3

Fast: Only two minutes for detecting one BTS.

Accurate: Support entire frequency band inter-

modulation interference detection to examine antenna

system performance.

Convenient: One MML to get all the results.



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Cases of Interference DetectionCase 1: One cell with abnormal KPIs is suspected to

have inter-modulation interference

Case 2: Perform offline inter-modulation detection to

examine antenna performance.

Without 13.0 solution, the antenna inter-modulation

test can only be performed by experts with

instruments, and the antenna need to be removed

from site.

Inter-modulation Product

Test Result

906 MHz (5th PIM) -89 dBm891.4 MHz (7th PIM) -98 dBm

Inter-modulation Product

Test Result

906 MHz (5th PIM) -89.5 dBm

891.4 MHz (7th PIM) -99 dBm

After the BSS 13.0 solution is applied, the work can be done at remote

end without experts, special analyzer and going to the site.

Results of 13.0 solution Results of Analyzer

① Perform online inter-modulation test for this cell

② The test indicates that inter-modulation interference

occurs in the cell.

③ Rectify the inter-modulation fault on site and confirm

that the fault is caused by aged antenna joints.

Remove the antenna

Experts go to the site with special

analyzer

1 2Perform test after

connecting the tester to the

antenna

3

Reconnect the antenna

4

Display the test results

Perform the test at remote end

1 2



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VSWR Detection

Strict test is done during engineering to prevent faults,Real-time testing is done during maintenance phase to reduce the impact of faults.

Engineering modeEngineering mode Maintenance modeMaintenance mode

Remote high-accuracy testRemote high-accuracy test Real-time test

Alarm for VSWR

Real-time test Alarm for VSWR

Reduce the frequency of using special instrument and

going to site ,find and solve problems during

engineering as soon as possible.

The faults can be found by alarm indicating abnormal

standing wave and will be handled according to their

severities.

Alarm ID/Name Meaning

12830 level 1

standing wave alarm

This alarm occurs when the standing

wave ratio exceeds the threshold for

level 1 standing wave.

12832 level 2

standing wave alarm

This alarm occurs when the standing

wave ratio exceeds the threshold for

level 2 standing wave.




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TDM Transmission TroubleshootingAterBTS Abis A MSCTCBM

Y

Y

Y

Y

Y

Y

Y

Y

Y Y Y

N/A Y N/A

N/AY N/A

GBSS 8.1

GBSS 9.0

GBSS 9.0

GBSS 9.0

GBSS 13.0

GBSS 9.0

GBSS 8.1

Y Y YGBSS 8.1

Y N/A N/AGBSS 9.0

Y Y YGBSS 8.1

E1 Physical Loopback Detection

TNU Interconnection Detection

E1/T1 Port Loopback

SCU Interconnection Detection

E1/T1 Timeslot Loopback detection

Ater Transmission Detect

Abis Crossed Pair automatic Detection

E1 Crossed Pair Connection Detection

Self-Test and Healing of Abis Timeslots

BERS Monitoring

BER Monitoring Y Y YGBSS 8.1

Transmission BER

Timeslot Fault

Crossed Pair Connection

Transmission Interruption Y

Y

Fault type Solution Roadmap




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IP Transmission TroubleshootingBSCBTS IP Network IP Network CN

Trace Route (application layer)

Transmission Resource RealTime Monitoring

Y

Y Y

Y Y

Y Y

N Y

Y N

Ping (application layer)

Y

Link Performance Monitoring

Packet Capture (Mac/IP layer)

BTS IP Performance Monitoring

IP Network Interruption

IP Traffic and Bandwidth Monitoring

BFD (application layer)

N

Y Y

Y Y

IPPM (application layer)

Y

ARP Detection (network layer)

QoS (Delay, Packet

Loss and Congestion )

Fault type Solution Roadmap

GBSS 8.1

GBSS 8.1

GBSS 9.0

GBSS 9.0

GBSS 9.0

GBSS 9.0

GBSS 9.0

GBSS 9.0

GBSS 9.0

License is only required for IPPM/BFD/ARP detection.



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Transmission Fault Detection Solution RoadmapTransmission

TypeFault Type GBSS 8.1 GBSS 9.0 GBSS 13.0

TDM transmission

Transmission interruption

E1/T1 port loopback E1 Physical Loopback Detection

SCU Interconnection Detection

Inter-Subrack TNU Resource Detection

Crossed pair connection

Crossed Pair Connection Detection

Ater Transmission Detection Abis Transmission Detection

Timeslot fault E1/T1 Timeslot Loopback

Self-Test and Self-Healing of Abis Timeslots

Transmission BER BERS Monitoring

BER Monitoring

IP transmission IP network interruption Ping Packet capture (Mac/IP layer)

Trace Route

IP traffic and bandwidth monitoring

Transport Resource RealTime Monitoring

Link Performance Monitoring

BTS IP Performance Monitoring

IP network quality (time delay, packet loss and jitter)

IPPM (application layer)

BFD (application layer)

ARP detection (network layer)



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Radio Frequency (RF) Troubleshooting


Standing Wave Detection



Speech Troubleshooting


Geographical Distribution of Services

Routine Maintenance

Solution


iSStar Intelligent Script Development Platform

Basic O&M

Solutions

GSM O&M Solution




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Voice Fault Troubleshooting

The faults can only be found by complaints from customers

Many drive tests are needed and the problem may not appear

How to confirm the exact problem point after the problem appears?

End-user complaints of

silent call, echo call,

crosstalk, and noisy call

account for a large

proportion in the total

complaints. However, it is

very difficult to solve the

problems.

① Monitor: Automatically detect silent call and crosstalk, generate

alarms to help maintenance engineers find the problems.

② Fault locate: Locate the fault

through log analysis without

drive test.

③ Confirm: User resource binding and interface loopback can

confirm the exact problem point.

• The log contains details about the

fault call including IMSI, resources

occupied by the call.

• In BSS13.0, log automatic analysis

are supported in WebLMT.

CaseSilent call problem happens in a network. It can be found in the log that all faults occurred on one

E1. Through check the transmission, it is caused by transmission crossed pair.

Solution and effectsStatus quo and problems

Note ： License is not needed.



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Voice Fault Troubleshooting

Fault Type GBSS 8.1 GBSS 9.0 GBSS 13.0

Silent call BSS TDM silent call detection A interface CIC caused

silent call detection

BSS IP silent call detection

Crosstalk BSS crosstalk detection Crosstalk detection over air

interface

Echo call Echo detection and

suppression

MSC

Crosstalk detection over

air interface

BSS silent call detection

BSS crosstalk detection

Noisy detection (planned)

BSCBTSMS

CIC caused silent call detection

Echo detection

Echo suppression

Abis: TDM/IP A: TDM/IP

Benefits Find faults automatically, locate fault units quickly. Reduce end user complaints and large numbers of drive tests.

Note ： License is not needed.



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Signaling Plane Problem Troubleshooting

CNBSCBTSMS

Abis A/Gb

BSSAP trace

SCCP trace

MTP2/MTP3 trace

GB interface trace

UM

RSL trace

OML trace

LAPD trace

Um interface CS/PS signal trace

CS/PS user trace

CBC interface trace

Benefits Perfect and convenient signaling trace provides sufficient data related to various KPI faults.

Therefore, the faults can be located quickly.

Trace/analysis

BSC 2BTS 1 BTS 2

Multi-BSC

signal traceData reporting

M2000/

FARS

1 2

BSC 1

1. Convenient interface/user signaling trace capability

2. FARS--Network-level signaling trace and graphical analysis

Support call trace and call flow chart

Display MR level and quality in graphs

Note: License for FARS server is required


No more method to

solve specified user

signaling problem

except for statistic

analysis

Difficult to trace user

signaling while user

moving between

different BSCs.



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Routine Maintenance

Solution



Basic O&M

Solutions

GSM O&M Solution




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End User Complaint Handling and Care for VIP

End user complaint

Customer service

Nastar

Network optimization

engineerVIP analysis, cell

performance analysis

BSC(including SAU)

BTS BTS

Nastar processes CHR data and reports the data to the optimization engineer.

BSC provides Call

History Record

(CHR) for complaint

handling and

VIP/VAP.

NE


Large numbers of drive test

are needed to find the fault

Long time are needed while

successful closure rate is

low

KPIs cannot reflect end user

experience

Store all call history record(CHR)

Analyze CHR on Nastar to identify the cause of the complaint

directly. Much time and Large numbers of test can be reduced.

Analyze VIP service quality and solve problems before VIP

complaint.

Identify Very Annoy Persons who are not satisfied with

network quality.

Note: License is needed



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Complaint Handling Solution

Item ResultNumber of handled complaints 16

Average time for complaint handling 4 hours

Average manpower 0.5 person/day

Percent of faults located 95%

Solution and effects

Ater using the solution in a network. the period for handling

one complaint is reduced from 2 person-day to 0.5 person-

day and complaint handling successful rate rises to 95%.


Complaint handling depend on large numbers

of drive test and manpower. Especially for

problems appears with low ratio, it’s difficult

to recur during test

Long time are needed to close a conplaint.

Handle complaints through remote analysis, reduce time and manpower and enhance customer satisfaction.

Note: License is mandatory.

Procedure for using the solution:

Query the CHR on the Nastar with user IMSI to

find the records related to the complaint

Analyze the abnormal records(access failure,

abnormal release and poor service quality)

Solve the problems according to analysis result.

Reply to the customer and close the issue



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Complaint Handling CasesUser complaint: Abnormal call end occurs several times. The customer is dissatisfied with the network

quality.1. Query the recent call record of the

customer and find the dropped calls.

2. Analyze the calls and locate

the abnormal release reason.

3. Through analyzing the abnormal

signaling, Engineer found that the

problem is caused by air interface

connection failure.

4. Go on to analyze the MR data, Engineer

found that the RxQuality was bad and the

RxLevel was weak. According to the

location where the fault occured, weak

coverage was the root cause. The problem

was solved after adjusting the antenna of

the neighboring sites.



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VIP Customer Care Solution

Procedures for implementing the solution:

① Register the VIP customers in Nastar;

② Regularly view the report of VIPs.

③ Analyze and solve the problems shown in the report.

The solution is based on CHR.

The trend of service KPIs can be measured by VIP customer

and VIP customer group. Through analyzing the KPIs,

engineers can find service problems happened to VIP, and

can solve the problem quickly.


Difficult to identify potential VIP service

problems. Therefore, VIP may be more and

more dissatisfied with the network when some

problem occurs.

Once a VIP complains, large quantity of

resources(manpower ,time) will be required

and the customer may not be satisfied with

results.

Monitor VIP service quality and solve problems before complaints to enhance VIP satisfaction.

Note: License is needed.

The KPIs are displayed by VIP

customer or VIP customer group

KPI shown by graph



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Cases for VIP Care• Background: During routine VIP KPI analysis, engineers find call drop rate of a VIP customer group

increased in the passed few days.2. Analyzing the call records, engineers find that the RxLevel is weak, which may be caused by weak coverage.

4. Perform drive test at the location where call drop occurred and

confirm that the call drop was caused by weak coverage. After

adjusting the angle of antenna, the problem is solved.

1. Query VIP group KPI and find the recent call drop rate is far below the standard.

3. Locate the cells where call drop occurred

and engineers find that the distance between

cells 9313 and 9318 is far.



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VAP SolutionSolution

Identify VAPs through CHR by several KPIs

Analyze problem reason

Solve problems


Impossible to identify potential complain users,

engineers have to “WAIT” for complaints

The Very Annoyed Persons (VAP) show low

satisfaction and may stop using the network.

Nastar show VAP information as below:

Identify dissatisfied users, solve problems of these users to improve network quality.

Note: License is needed

• Calling user setup fault• Called user setup fault• Abnormal release before call setup• Abnormal release after call setup• Short calling session• Short called session• Silent call• Crosstalk• Long calling setup time• Long called setup time• Abnormal RACH access level

VAP types



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Services Geographical Distribution

Network optimization depend on drive tests to get MR

while numerous MRs of users in network are not

used.

Traditional KPI can only find problems by cell level,

but can not find the exact location where problem

happens.

Display service KPIs on geographical map based on

numerous MR data and locating algorithm, the problem

points can be found easily in map with high precision.

Solution and ValuesStatus quo and Problems

Services Geographical Distribution help network optimization more efficiently.


Runways of XX

International Airport

Network coverage

• Service cell

• Uplink coverage

• Downlink coverage

• Uplink low RxLevel with

low RxQuality

• Downlink low RxLevel with

low RxQuality

• uplink interference

• downlink interference

• Area without dominant cell

Network traffic

distribution

• Voice traffic

• Low quality and low

traffic

Abnormal network

event

• Call drop times

• Handover failure

times

Service geographical distribution KPI

Case: Downlink RxLevel is shown in map. Different colors mean

different coverage condition.



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Routine Maintenance

Solution



Basic O&M

Solutions

GSM O&M Solution




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Proactive maintenance: Health

Care Find faults in the network through routine

network inspection

Find problems before customer complaints

high customer satisfaction

Passive maintenance: Fire

Flighting Passively respond to the equipment alarms

and customer complaints. Impossible to predict faults in the network Long problem handling period Slow response to customer complaints Low customer satisfaction

Check network regularly to improve the network quality and customer satisfaction.

Network Health Check

Collect data

Configuration check

Hardware Analysis

Network KPI check

Software Analysis

Network AnalysesGenerate report

for the entire network

Analyze the report and solve problems


Note: Service Delivery.

Configuration data

Alarm data

Performance data

Log file



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Intelligent Script Development Platform

Execute routine work automatically and regularly through scripts to improve effiency

Much Routine maintenance work (such as routine

analysis of traffic statistics, board check, and link

status check) must be regularly executed

manually, which lowers the efficiency.

iSStar: Application development platform of

Huawei OSS. Base on high level script language.

The ISStar is capable to:

Automatically analyze network configuration,

traffic statistics, alarms and other information;

Automatically generate reports;

Automatically modify network configuration

online.

iSStarplatform

Channel Type

automatic Adjust

Board Status

automatic

Check

Automatic adjustment of access

levels

…Script

Application

Use Intelligent Script Development Platform

(iSStar) to develop scripts for applied services, and

scripts will finish routine maintenance work

automatically.

Status quo and problems Solution




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iSStar Cases

Application of iSStar Solution

Good Bad

Background: The radio channels of network are congested during holidays and busy hours. To reach the balance between quality and capacity, we need to dynamically change the radio channel type adjust threshold.

Traditional solution:Network optimization engineers regularly analyze the traffic statistics of radio channels. Based on the states changing

between busy and idle, engineers constantly adjust the TCH type adjust threshold.

Problem: The traffic statistics analysis and manual adjustment takes long time, the effects of adjustment are

always delayed, which affects the service quality.

① Analyze the trend of

historical traffic change

to adjust the threshold

② Develop iSStar scripts to

analyze the traffic

statistics of occupied

channels in real time

③ The iSStar regularly runs

scripts and automatically

adjusts NE’s parameters.



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Routine Maintenance

Solution



Basic O&M

Solutions

GSM O&M Solution




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• Page 30

O&M DocumentsHuawei Electronic Documentation Explorer (HEDEX)

CDs(CDROM)of Huawei productsWebsite: http://support.huawei.com

• Classification by Scenario Scenario Reference

Maintenance

installation

Cabinet Installation Guide

Maintenance

commissioning

GSM Installation Guide

GSM Quick Installation Guide

GSM Initial Configuration Guide

GSM Commissioning Guide

Routine

equipment

maintenance

GBSS Routine Maintenance Guide

BSC6900 GSM LMT User Guide

BSC6900 GSM Alarm Reference

BSC6900 GSM Event Reference

BSC6900 GSM OMU Administration Guide

BSC6900 GSM Site Maintenance Guide

Routine network

optimization

GBSS Reconfiguration Guide

BSC6900 GSM MML Command Reference

BSC6900 GSM Parameter Reference

GBSS KPI Reference

BSC6900 GSM Performance Counter Reference

http://support.huawei.com/



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Maintenance Mode Management

Monitor the NE at project scenario Independently

to avoid large amounts of alarms affect normal

maintenance.

Alarm Correlation & Oscillation Alarm

Suppression

Help engineers focus on important alarms and

reduce alarm quantity

Threshold Alarm

Set the threshold for reporting alarm due to

abnormal KPIs. Alarms will be

automatically generated

once the KPIs reach the threshold.

AlarmSolutionStatus quo and Problems

Increased alarms in project scenario

Alarms numbers increase sharply in project

scenario, for example: transmission capacity

expansion , BTS adjustment between ports

Excessive alarms in routine

maintenance scenario

A fault results in multiple alarms

Many intermittent alarms

Fault without alarm

No alarms are generated when some faults occur,

and the problem cannot be found quickly.



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Maintenance Mode Management

Benefit Equipment state monitoring is not affected while some elements are in project scenario.


In project scenario, too many alarms

overwhelm normal major alarms.

Project scenario equipment alarms are

reported and managed separately.


So many alarms form NE A, where are the alarms from NE B?

The NEs at project scenario are

monitored independently.

Engineers can decide if the alarms

should be reported to NMS



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Alarm Correlation & Intermittent Alarm Suppression

Benefits

Focus on root alarms to help handle faults quickly

Reduce the amount of intermittent alarms to improve the efficiency of alarms

告警相关性

Intermittent Alarm Suppression

The intermittent alarms are filtered by this solution instead of reporting

all alarms. In some networks, alarms are reduced by 67% ratio after

implement the solution.

The alarm is not reported and lasts for only 7s.

The alarm is reported and lasts for 105s.

So many alarms happen at same time, which one should be handled first?

Alarm correlation:

Only alarms representing root causes are displayed; the child-alarms

are shielded. For major child-alarms that must be displayed, their

parent-alarms are also displayed to help solve the fault quickly.


One fault results in multiple alarms

Many intermittent alarms, for example:

E1 transmission intermittent

disconnection




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Threshold Alarm

No alarms generated when

KPI abnormal (such as high

call drop rate); engineers have

to “WAIT” for the complaints

from end users.

Much manpower is needed

for routine KPI monitoring

Too much information must

be analyzed to confirm the

fault scope.

Set thresholds for abormal KPIs in

M2000. Once KPIs are abnormal, alarms

are generated automatically.

When an alarm is generated, engineers can respond to it quickly before user complains.

Benefits

Automatically monitor key KPIs to find service problem quickly and avoid user complaints,

especially effective for faults without BSS equipment alarms(For example: caused by

interference, other NEs and so on ).





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O&M Tools

M2000

WebLMT

NIC

(NIC deploy with M2000.) Probe

BSC&BTS

Equipment Maintenance

Report system

Nastar

Network optimization

DAMS

PRS

Network analysis and optimization

Radio

parameter management

Drive test tool

Drive test data analyze

Assistant

CME

Tool solution covers all scenarios to support high efficiency O&M

Network informationcollection

Single BSS

maintenance

Configuration management

Network management



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Network Optimization Tool kit

M2000

GSMBSCBTS

RNCNodeB

PRSNastar

Analysis for hidden faults

Frequency optimization

VIP KPI analysis

Complaint handling

Customized KPIs

MR

CHR

Performance measurement

Preset KPI reports

DAMSParameter management

Uplink interference data

Uplink interference analysis

Neighbor cell optimization

Customize KPI reports

Parameter verification

Network Optimization Tool kit help promote network optimization and troubleshooting efficiency.

Network monitoring Network KPI ＋ TopN cell ＋ TopN TRX

User experience

RF 优化 Frequency optimization ＋ neighbor cell optimization ＋ interference analysis ＋ coverage analysisRF optimization

VIP care ＋ customer complaint handling

Parameter management Parameter query and share + entire network parameter check + parameter modification management




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GSM 9.0 ConfigurationGBSS9.0 OSSGBSS8.0 OSS

Software upgrade

Routine maintenance

Traffic statistics

inspection

M2000

Operation maintenance

Function moving up

GUI radio

parameters

LMT

MML

GUI configuration

Real-time monitoring

Interface trace

M2000

Radio, transmission, equipment parameters

Web LMT

MML

Real-time monitoring

Interface trace

Centralized maintenance

Equipment panel

Equipment panel

Single NE maintenance

GUI configuration

Equipment panel

Centralized maintenance: The single NE maintenance is replaced with the centralized network maintenance

Multi-client parallel configuration: Configuration can be done in parallel by several engineers

SigleRAN evolution: Single GSM maintenance to SingleRAN maintenance

Web client: No need to upgrade client

Software upgrade

Routine maintenance

Traffic statistics inspection



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GSM O&M Solution roadmap—Easy OM!Classification BSS 8.1 BSS 9.0 BSS 13.0 Planning

Engineering troubleshooting

solution

RF tunnel troubleshooting

Interference Detection Interference detection enhancement

VSWR Detection

Basic TDM transmission troubleshooting solution

SCU/TNU connection detection

E1 physical loopback detection

Crossed-pair over Abis interface detection

IP transmission troubleshooting solution

IPPM over E1

Service troubleshooting

solution

TDM silent call detectionBSS crosstalk detection

echo detection, Echo suppression

Silent call detection over A interface

IP silent call detectionCrosstalk detection over

air interface

Noisy call detection

Interface/User signaling trace FARS NS trace over Gb

User complaint handling and

services geographical distribution

User complaint solutionVIP care solution

VAP solution

PS CHR solution

service geographical distribution

Routine maintenance

Equipment health check

iSStar

Alarm

Maintenance Mode Management threshold alarm

Alarm Correlation & Intermittent Alarm Suppression

Alarm documents improvement

O&M toolsM2000/NIC/Nastar/PRS/DAMS/

PRS/AssistantCME

WebLMT



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GlossaryGlossary Description

BTS Base Transceiver Station

MS Mobile Station

BSC Base Station Controller

MSC Mobile-service Switching Center

DFCU Filter Combiner Unit

DDPU Dual-Duplexer Unit for DTRU BTS

VAP Very Annoyed Person

IPPM Internet Protocol Performance Monitoring

BFD Bidirectional Forward Detection

CHR Call History Record

MR Measure Report

gsm o&m solution v1.1

Documents

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