PRESENTATION ON Operating

Support Subsystem (OSS)

BY:

Naveen Jakhar, ITS

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Agenda1. WHAT IS OSS ?

2. ELEMENTS OF OSS

3. NEED FOR OSS

4. FUNCTIONS COVERED BY OSS

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DEFINING OSS

Stands for OPERATION SUPPORT SYSTEM.

Set of systems connected together and to other

network element(like BSS, NSS etc.) of a TSP.

It is a separate centralized system which monitors

and controls the network.

If we take taxi analogy then:

• Taxi as TSP

• Engine as Network

• Dashboard as OSS

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OSS is connected to network elements via

standardized interfaces like Ethernet etc.

OSS can be understood as combination of two entities

1.NMC(Network Mgmt. Center)

2.OMC(Operation & Maintenance center)

Both can be installed at same physical location or at

different sites.

GSM NETWORK ARCHITECTURE

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Elements of OSS

There are 4 key elements of OSS

1.Processes : the sequence of events.

2.Data : the information that is acted upon.

3.Applications : the components that implement

processes to manage data.

4.Technology : how we implement the application.

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NEED FOR OSSIn today’s multivendor and multiservice scenario

OSS works as mediator & provides real time end

to end overview and control of information

remotely.

Customer tools like ERP,CRM etc. it is also

possible to upgrade OSS as per changing

conditions and requirements.

Real time supervision to maintain QoS.

Billing and charging.

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OSS touches the following aspects of telecom

network :

• Plan : by engineering team

• Build : work force mgmt., order mgmt., inventry

mgmt. etc.

• Operate : alarms, troubleshooting, fault mgmt.

• Optimize :performance mgmt. for exponentially

growing traffic

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1. Configuration Management

2. Fault Management

3. Performance Management

FUNCTIONS OF OSS

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1. Configuration Management

Cell level planning and operation.

Planning Major future changes.

Implement new cells or other

parameters in network if needed.

We can take example of BTS equipment

management

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BTS Equipment Management

Configuration, Reconfiguration, enabling &

disabling the complete or selected parts of

BTS .

BTS software loading, checking information

about stored package.

BTS hardware dimensioning and planning.

BTS alarm management.

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2. Fault Management

Faults are reported by various types of

alarms:

Critical: Immediate action needed.

Major: action to be taken as soon as

possible.

Minor: observe the situation or take action

when there is time.

Warning: take action during routine

maintenance.

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2. Performance Management

By data collection and processing .

By preparing statistical reports.

By maintaining KPI(Key Performance

Indicators) mandated by TRAI for best

QoS.

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2. Some QoS Parameters

BTS down time report: it shows BTSs

accumulated downtime(<=2%as per TRAI)

BTS Sector report: it shows

1.Call set up success rate(>=95%as per

TRAI).

2.SDCCH congestion(<=1%as per TRAI).

3.TCH congestion(<=2%as per TRAI).

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2. Some QoS Parameters

4. Call drop rate(<=2%as per TRAI).

MSC traffic report

PoI congestion(<=0.5%as per TRAI)

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THANK YOU