Building Bridges of Understanding

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Building Bridges of Understanding

TechnicalDepartment


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Pakistan Mobile Communications (Pvt.) Limited 2

OVERVIEW OF PRESENTATION

BRIEF INTRO TO GSM

TECHNICAL DEPARTMENT ORGANOGRAM

BRIEF FUNCTIONS OF EACH DEPARTMENT

ACHIEVEMENTS

ONGOING PROJECTS

MEASURES BEING TAKEN TO IMPROVE THE SYSTEM/ SERVICES

FUTURE PLANS

BOTTLENECKS


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Introduction to GSM(Global System for Mobile Communication)


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GSM

History: During the early 1980s, each European country developed its own system, which

was incompatible with everyone else's in equipment and operation.

In 1982 the Conference of European Posts and Telegraphs (CEPT) formed a study

group called the Groupe Spcial Mobile (GSM) to study and develop a pan-European public land mobile system. GSM was later named as Global System for

Mobile Communication.

GSM Objectives:

Good subjective speech quality

Low terminal and service cost

Support for international roaming

Ability to support handheld terminals

Support for range of new services and facilities

Spectral efficiency (maximum number of subscribers per available radio channels)

compatibility with the digital fixed system (ISDN)

Security because of Digital Encryption.


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GSM

GSM Specific Features

Mobility:

The GSM subscriber can move nationally and internationally without

changing its own number.

This is possible through the Handover and the Roaming

The handover is the process of moving the communication from one cell

to another cell, in order to keep a good voice quality while the subscriber

is moving.


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GSM

Roaming

The roaming is the capability for a PLMN (Public Land Mobile Network)

subscriber to use other PLMN in the same country or in different country,

without changing his mobile equipment of his subscriber number


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GSM

GSM Network Elements



GSM

Mobile Station (MS):

Two main components:

Mobile Equipment (ME)

Subscriber Identity Module (SIM)

Base Station Subsystem (BSS):

Three main components:

BTS (Base Transceiver Station)

BSC (Base Site Controller)

XCDR (Transcoder)



GSM

Base Station Subsystem:

BSC (Base Site Controller):

Controls up to 30 BTS

Conveys information to & from BTS

Connects terrestrial circuits & Air Interface channels

Controls handovers between BTSs under itself

Provides connectivity b/w MSC & BTS

BTS (Base Transceiver Station):

Contains RF Hardware

1 - 6 carriers in a BTS Cabinet

7 - 48 simultaneous calls per BTS

Transcoder (XCDR): Converts 64 Kbps PCM circuits from MSC to 16 Kbps

BSS circuits.

Each 30 channel 2 Mbps PCM link can carry 120 GSM- specified voice channels.

B

T

S

B

T

S

BSCAir Interface

B

T

S

MSC

2 Mbps PCM link (E1)

T

R

A

U



GSM

OMC (Operation and Maintenance Centre)

NOC (Network Operations Centre):

Monitors Nodes on the Network

Monitors Network Element Statistics

Enables Long Term Planning for entire Network

Monitors OMC regions & provides information to OMC staff



HOW A GSM CALL IS ESTABLISHED



Mobile to Mobile

MSC



Mobile to Landline

PTCL Exchange

MSC



Mobile to Mobile Different Networks

MSC (Operator A)

MSC (Operator B)



TECHNICAL BRIEF ORGANOGRAM



ENGINEERING ACCESS NETWORK

CELL PLANNING



CELL PLANNING

To Propose and design new sites in existing and new cities and highways.

To participate in New Cell Site Surveys along with other Departments to ensure the

RF suitability of the position being chosen.

Give full RF specifications for new sites design (Antenna type, Azimuths, Tilts, etc).

Also give RF specifications of the Swap Sites.

Responsible for the frequency & neighbor planning of the sites (Both GSM 900 MHz

& DCS 1800 MHz)

Responsible for the traffic planning/stats monitoring of the sites and proposeexpansions to enhance the capacity & remove Congestion.

Drive Test of the Cellular Network to Check the Coverage.

Responsible for the site health reports for the verification of the site objectives and

to diagnose if there is any problem/issue with the working of the site.

Help Optimization in Diagnosing Radio Network issues like Drop Call, Handover

Failure, Interference, Voice Breakup etc.

To perform and analyze drive tests and to make fine tuning by changing antenna tilt,azimuth, frequency etc.

Propose and design Micro cells, repeaters specially in poor coverage areas,

highways, rural areas etc.

To respond to and rectify Coverage related Customer Complaints.

To participate and represent Mobilink in Regulatory Authority (PTA) network audits.



How a site is bOrN!



ENGINEERING ACCES NETWORK

RF OPTIMIZATION



RF Optimization

Responsible for the Optimization of the network performance (Quality) To monitor the stats like CSSR, HSR, DCR, Blocking on daily basis and to

make sure that the threshold is maintained.

Responsible for the troubleshooting of the issues like H/W issue, Call

Quality issue, etc

To perform drive test on daily basis to check the call quality, call

connectivity, GPRS connectivity, etc. Interaction with the other departments like OMC to implement any WO for

any change in the parameters of the site, with BSS for any H/W issue, with

Cell Planning for any frequency changes and to ask for the expansions.

To respond and rectify Quality Related Customer Complaints.



ENGINEERING ACCESS NETWORK

BSS PLANNING


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BSS PLANNING

Capacity Planning for BSS Network, BSC Boundary planning, LACPlanning for new cities, ATERs requirement (Capacity at back haul)

Regular monitoring of BSS KPIs like Trunk Utilization, Processor

Utilization, Paging and Busy Hour Call Attempts

To plan new BSCs in view of increase in Traffic on city basis to keep the

BSS KPIs within the threshold.

To provide resources and database for creation of new sites in BSC(Base Station Controller)

For GPRS launching in new cities, to provide the H/W resources , to

coordinate b/w relevant departments for execution of project, To provide

plan and complete database creation required for GPRS.

To plan Alcatel swap project (to swap existing sites of Motorola to

Alcatel).


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ENGINEERING ACCESS NETWORKTRANSMISSION PLANNING


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Transmission Planning

To efficiently & cost effectively provide the transmission media (Wired[Optical Fiber]+ Wireless [Microwave]) for the Integration of all the network

elements in GSM Network like BTS Cell Sites, BSCs and MSCs, Call Centre, IT

and Billing.

To minimize the CAPEX (Capital Expenditure) and OPEX (Operational

Expenditure) of Mobilink by introducing new technologies like Asynchronous

Transfer Mode (ATM) and Frame Relay for both DATA and VOICE

To build our own Optical Fiber Backbone from Karachi to Peshawar To fulfill the capacity needs essential for the growth of the Network from 10

Million to 20 Million.

To synchronize all the elements of GSM Network through standard clocking

mechanism for their efficient performance.

To maintain Quality, Cost and Capacity throughout the planning &

Deployment phase. To participate in New Site Surveys to ensure that Line of Site for connectivity

is available for the acquired location.


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LOGISTICS


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LOGISTICS & ENERGIZATION

To acquire maximum Cell Sites in the area specified by Cell Planningwithin the search radius.

Ensuring while acquiring the location that it does not create problems for

the community due to its commissioning.

Site is so selected should be acceptable to all associated departments

(Cell Planning, Production, Transmission).

Provision of WAPDA connection to the acquired location. Deal with all Government agencies associated in the process of

acquisition.

To interact / be an interface with all legal departments.

To ensure that there is no hindrance during / after acquisition / later on as

long as the Cell Site is operative.


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PRODUCTION ENGINEERING


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Production

The main role of Production Engineering department is Physical

construction of new cellular network infrastructure and maintenance of theexisting civil infrastructure for smooth operations.

Production Engineering Department conduct site Surveys for the new cell

sites along with Cell planning, Logistics & Transmission departments.

Selection of the suitable sites Green field or Roof top, their design &

construction with Structural safety standards are the responsibility of

Production Engineering Department. Supervision of the monthly build out targets and their timely completion.

Construction of Switches, BTS sites, BSC sites, Micro/repeater cell sites

installation of the out door antennas as per specs and requirements.

Installation & commissioning of Power Supply systems i.e Generators,

ATS panels, Rectifiers, AVRs, UPSs.

Installation & Commissioning of Fire fighting systems & safety alarm

systems at Cellular sites.


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BSS DEPLOYMENT


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BSS Deployment

Comes into Role when a site is RFIed from Production.

RFI Visit of the site by Deployment.

Plan for weekly sites considering RFI of sites, Hardware calculations, equipment

availability.

Collection of plans from other departments like Cell Planning, BSS Planning, TXN

Planning etc.

Transportation of all indoor equipment i.e. BTS, rectifier, MW etc.

Request to Production for Out Door and Genset for preferred sites. Installation of Rectifier (IVY), BTS (Motorola), MW (Myson).

Site Equipage in OMC and Cell ID creation at NSS.

Commissioning of site once all a/m process is complete.

Executing the Expansion Plan initiation from Cell Planning.

Detailed plan of sites covering current and proposed config, Hardware calculation,

Hardware availability, additional transmission link requirements, additional cabinets,Radios, additional/replacement antenna requirement, feeder cable, Rectifier modules

etc.

Request for change of expansion plan depending upon HW.

Request for antenna installation (if required)

Commissioning the site once all a/m process is complete.


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OPERATIONS ACCESS NETWORK

OAN


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OAN

To ensure the network availability round the clock by minimizing thenetwork outage.

To take corrective measures in case of any emergency in Network entity

within the BSS which includes BTS, BSC and the RXCDR

To perform preventive maintenance of Cell sites, BSCs in the Network on a

regular basis.

To take care of Quality related issues in BSS with respect to Hardware inco-ordination with the RF Optimization team.

To take care of Environment related issues (Air conditioners, Fire panels

etc.) at all Cell sites, BSCs and MSCs in co-ordination with the vendors.

To take care of Transmission systems connecting various entities of the

Network including Microwave systems, ATMs, Optical Fiber systems,

Multiplexers etc in co-ordination with various vendors. To commission and integrate new cell sites, BSCs and MSCs with the

existing Network in co-ordination with other sections like Deployment,

Production, Cell Planning, Transmission Planning, NSS etc.


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NETWORK OPERATIONS CENTER

NOC


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NOC

NOC Coordination: Responsible for Performance Analysis of the Network and this is done through stats

monitoring and generating different network reports.

Responsible for critical follow ups after network expansion and modification

activities to ensure smooth functioning of the network.

Co-ordination reports are sent to different departments of Mobilink to give them a

picture of the entire network and its performance.

OMC Transmission Team: The Team is responsible for monitoring / handling and reporting of all transmission

equipment like Lucent ATM, NEC PNMS, OSCILLOQUARTZ, Tellabs DXX, Huawei

OFS.

Through Lucent ATM GPRS and Inter City MSC connectivity is being monitored

The NEC provides the microwave links where applicable of all existing sites in the

Network.

OSCILLOQUARTZ provides the Clock synchronization for the Entire Network.

Tellabs DXX provides the monitoring of UAN numbers, Inter MSC Connectivity etc.

Huawei OFS provides the monitoring for the entire Intra City Fiber Optic Network.


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NOC

NOC configuration Management: Nationwide parameter configuration in BSS Network to resolved the major

RF optimization/cell planning issues. GPRS configuration and troubleshooting GPRS issues network-wide on

cell. Database creation for new BTS sites, BSC, RXCDR. Handling of Quality Complaints, follow-up and immediate resolution.

Network rollout, network expansions, BSC shifting, BTS re-parenting BSSsoftware upgrade, database management, and integration activities atnetwork level (BSS, BSC, MSC).

BSS Fault Management : Day to day activities involved Motorola/Alcatel Fault Management 24x 7

Executions of planned online activities in late evening Hours.

Daily Down Time Report GPRS services Fault Management and recommendations. Interactions with other Engineering Dept( NSS , IN , IN VAS , OAN ) to

trouble shoot combined services. Interactions with CS department for the intimation through G-Mail and

Email.


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ENGINEERING CORE NETWORK

NSS


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NSS

To ensure successful integration, commissioning and launch of all newentities.

To ensure the timely backup of all entities.

To ensure secure access to all entities.

To ensure 99.9 % availability of all switches throughout the year.

To ensure satisfaction for both internal and external customers ofMobilink.

To ensure proper and timely corrective and preventive action in the region

for all issues.

To ensure that all switches are working as per vendors recommendation

and specification.

To rectify Switch Related Customer Complaints.


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ENGINEERING CORE NETWORK

IN OPERATIONS


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PROJECT MANAGEMENT


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ACHIEVEMENTS


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Growth of PMCL Network

Total No. of Sites in PMCL Networ

10511118

12021279

13911433

1599

1687

1765

1903

205621162137

23502415

25412585

26802736

282228452897

29583032

30593102

320632223289

3348337434093445

3480350935473567

35983615

780

980

1180

1380

1580

1780

1980

2180

2380

2580

2780

2980

3180

3380

3580

3780

6/29/2004

June

9/23/2004

Sep

12/31/2004

Dec

03/25/2005

March

06/01/2005

June

08/25/2005

August

10/8/2005

October

11/23/2005

November

12/25/2005

December

2/4/2006

February

3/8/2006

March

3/30/2006

March

4/22/2006

April

Date

NumberofSite

s


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Achievements

15 Million subscribers capacity achieved.

In year 2005, 1566 sites and thirteen Switches, 5 Gateways and 4 IN Platforms were

commissioned in 2005 bringing total number of switches to 23.

600 Sites have been added to date in Year 2006, 40 BSCs and Media Gateways,

NGNs and Soft HLR (HLS) deployed.

Network capacity more than doubled in a small period of 12 months.

Centralized database implementation (DONE) was put into service to serve as asingle point of access for all Engineering Access Network.

Model Tuning done for accurately predicting the coverage and the quality of the

network.

Intra and Inter department standard operating procedures (SOPs).

Centralized project management of Rollout to foresee and overcome any

hindrances affecting the company targets.

Laying and Commissioning of Fiber Optic from ISB to LHR and Pindi Bhattian to

FSD completed.

5th Switching Location i.e. Multan successfully Commissioned.


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ONGOING PROJECTS


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Ongoing Projects

Expanding GPRS service areas introducing EDGE in Islamabad. Alcatel Swap Project OFJAN Project New Cities Project & New Highways Project. Transmission Backbone through microwave repeaters

Railway Sites Project Special Events Capacity Planning (Basant etc) Data Warehousing Network Audit Micro Layer Planning Bench marking against other operators

Trial of new Value Added Services (PTT etc) NOC Integration. Soft Switches. Long Distance International (LDI) GT Road ISB to LHR will be completed in

a months time, which will be followed by Multan to Shikarpur.


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FUTURE PLANS


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FUTURE PLANS

20 Million subs network.

21 Million subs capacity.

Approx 2500 sites targeted for the year 2006.

Another 2000 expansions on existing sites to be executed.

36, 000 radios to be added within the network.

Build out of nearly 1900 Macro Sites and 500 Micro Sites.

A number of new Switches and BSCs to be deployed and Commissioned.

Long Distance International and OFJAN project to be completed details on

next slide.

Media Gateways in Remote Cities will be completed.


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BOTTLENECKS


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Bottlenecks

Lease Lines Availability.

Site Acquisition becoming more and more difficult ( Cantonment, Railway

& Difficult Sites) and more awareness in public.

Fast roll out pace Vs optimization challenge.

Maintaining Quality of Service even without affecting the Rollout.

Timely availability of Equipment. Skilled Resource Shortage and Churn.


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MEASURES BEING TAKEN TO IMPROVE

THE SYSTEMS/SERVICES


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Measures being taken to improve the services

SOPs (Standard Operating Procedures).

Technical Consultants (Aircom and others) being inducted in to improve quality andfunctionality.

More Professional tools being used for Network Planning and Optimization.

Traffic Subs forecasting being done on regular basis to provide additional capacitybefore congestion.

Customer complaints handling mechanism under constant optimization..

Regular Audit of the Network from within and 3rd

parties being done so as not toloose track of the existing network and with the aim of applying a Stitch in Time. Standardized Data base being maintained and steps being taken to commission a

specialist Custom built Data Warehouse for easy and homogenous access by allDepartments.

Fibre Optic Backbone between Core Network ensures that no dependency on anyother department for instance PTCL.

Soft Switches ensure faster rollout, twice the capacity and very minimal spacerequirements.


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THANKYOU

Documents

Building Bridges of Understanding