PRESENTED BY:- BHAJMEET SINGH ROLL NO-6070405218

PRESENTATION ON

SIX MONTH INDUSTRIAL TRAINING

UNDERTAKEN AT

INTRODUCTION

TO

BHARTI AIRTEL

Sunil Bharti Mittal (Group Chairman and Managing Director) “As we spread wings to expand our capabilities and explore new horizons, the

fundamental focus remains unchanged: seek out the best technology in the world and put it at the service of our ultimate user: our customer.”

Mr. Sunil Bharti Mittal,

GSM BASICS

BLOCK DIAGRAM OF GENERAL GSM BLOCK DIAGRAM OF GENERAL GSM SYSTEMSYSTEM

MSC Mobile Switching Centre

• Exchange where calls are established, maintained and released.• Database for all subscribers and their associated features.• Communicates with BSC's on MS side and with PSTN on fixed line

side.• MSC is weighted on the number of subscribers it can support

HLR - Home Location Register

• MSC has all subscriber database stored in HLR• HLR has all permanent subscriber database• MSC communicates with HLR to get data for subscribers on call

HLR

• HLR will have the series of all subscriber numbers, which may not be activated or issued .

VLR - Visiting Location Register• A subscription when activated is registered in VLR• VLR has all the subscriber no's which are activated • VLR also has temporary database of all activated subscribers ( on/off,

location )

VLR

HLR

• MSC communicates with HLR for subscribers coming from different MSC'sand if found valid, then registers them in its VLR

AUC - Authentication Centre

Authentification is a process by which a SIM is verified Secret data and the verification process algorithm are stored at AUC AUC is the element which carries out the verification of SIM AUC is associated with the HLR

HLR AUCMSCMS

EIR : Equipment Identity Register• EIR is the Mobile Equipment Database which has a series of IMEI's• MSC asks the Mobile to send its IMEI• MSC then checks the validity of IMEI with the EIR• All IMEI are stored in EIR with relevant classifications

Classifications of IMEI( Mobile Stations )

EIR

White List

Grey List

Black List

MSC

BC - Billing Centre

• BC Generates the Billing Statement for each Subscriber• BC may be directly connected to the MSC• MSC sents the billing information ( duration of call ) to

BC• BC then produces the billing amount based on the units set

BC

WORK PROFILE (switch department)

VIEW OF SWITCH ROOM OF AIRTEL

WORK PROFILE-SWITCH WORK PROFILE-SWITCH DEPARTMENTDEPARTMENT

MY TASKS WERE-

1. HANDLING and INSIGHT into MSCs,HLR, VLR.

2. BACKUPS.3. HEALTH CHECK or SIM TESTING.

ERICSSON’S AXE SYSTEM STRUCTURE

1. GROUP SWITCH Switch and the devices is provided by the DL-34 Each GEM

contains two switch boards - one for each switching plane. The interface between the Group.

2. APZ CENTRAL PROCESSORThe APZ, the heart of the AXE, provides a flexible and a

powerful control system offering high hardware fault tolerance. In the event of a fault, control may be swapped to the other side with minimum or no impact on traffic handling capability.

CONNECTION OF APZ FOR VARIOUS CONNECTION OF APZ FOR VARIOUS APPLICATIONSAPPLICATIONS

3. ADJUNCT PROCESSOR GROUP(APG)3. ADJUNCT PROCESSOR GROUP(APG) It is interface between CP of MSC and HUMANIt is interface between CP of MSC and HUMAN

SINGLE APG NodeSINGLE APG Node

EXTERNAL CONNECTIVITY (one node)EXTERNAL CONNECTIVITY (one node)

APG40 – REDUNDANT TWO NODESAPG40 – REDUNDANT TWO NODESIt has three IP addressesIt has three IP addresses

WINFOIL SoftwareWINFOIL Software

IT IS SOFTWARE REQUIRED TO OPERATEAPG NODE THROUGH COMPUTER AND IT CANBE USED- For checking Node Status For checking ServicesFor checking Clock HealthFor backupsFor testing

The snapshot of win foil softwareThe snapshot of win foil software

NODE STATUSNODE STATUS

Following commands gives Active APG node eaw MSC1 {Logs into MSC1} aploc; {Enters into C:\} hostname {hostname and active node} mml; {Exits the C:\} exit; {Exits the MSC1}

SUBSCRIBER SERVICES PROVISIONINGSUBSCRIBER SERVICES PROVISIONINGThe other work which I learnt is to check the Subscriber Profile through Home The other work which I learnt is to check the Subscriber Profile through Home

Location Register which is shown in the computerLocation Register which is shown in the computer

PROFILE STATUS

MPTY- Multiparty/ Conference OBO2- STD Calls OSB1- Limited STD (Local Profile) PRBT1- Hello tune Stype7 and Stype9- Punjab Prepaid OICK 15, 20, 29- Punjab Prepaid depending upon the series (151, 724,

726) TS11, TS21, TS22- For messages CFU- Call Forwarding Unconditional CFB- Call Forwarding when Busy CFNRY- Call Forwarding on no Reply CFNRC- Call Forwarding when not reachable BAOC- Barring of all Outgoing Calls BAIC- Barring of all Incoming Calls CAW- Call Waiting Active CLIP- Caller Line Identification Presentation

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BACKUPSBACKUPS

Backups are basically taken for the purpose of redundancy. As the software is loaded for all the hardware installed which is very much prone to errors and bugs, also the network changes are being made continuously ,so it becomes very essential to have a back up, a duplicate copy of all the changes made and that even very up to date

DIGITAL AUDIO TAPEDIGITAL AUDIO TAPEIt is used to take all the three backups

TYPES OF BACKUPSTYPES OF BACKUPS

1. Manual ( on data tape)

2. Automatic( on Hard disk)

Backups taken can otherwise be categorized as: a) CP (Central Processor)-Taken weekly b) APG (Adjunct Processor)-Taken monthly c) RTR or TT (Toll Ticketing file)-Taken every

3rd day

HEALTH CHECKHEALTH CHECK

Welcome sms testingSMS testing Call testingReach me cases or Supplementary service test.

WELCOME SMS TESTINGWELCOME SMS TESTING

Whenever a subscriber latches on to home network from the other network/area then Home network gives Welcome SMS to the subscriber. Winback SMS is the acknowledgment to the subscriber that you have logged off the preferred network (Airtel).

SMS TESTINGSMS TESTING

In SMS testing following steps are performed:

1. MO (Mobile Originating) SMS from test Sim to Airtel Sim.

2. MT (Mobile Terminating) SMS to test Sim from Airtel Sim.

CALL TESTINGCALL TESTING

In call testing following steps are performed:

1. MO (Mobile Originating) call from test Sim to Airtel Sim

2. MT (Mobile Terminating) call to test Sim from Airtel Sim.

SUPPLEMENTARY SERVICES TESTSUPPLEMENTARY SERVICES TEST

1. Barring of all outgoing calls (BAOC)2. Barring calls except home country (BOIC-EXHC)

of all outgoing international calls (BOIC)3. Barring of all outgoing 4. Barring of all incoming calls

5. Call forwarding when not reachable (CFNRC):6. IMSI DETACH case7. Call forwarding when not reachable (CFNRC):

SWITCH OFF case8. Call forwarding when no busy9. Call forwarding when no reply10. Call forwarding unconditional

ERICSSON’S LIVE PROJECT1. R13. UPGRADE OF ALL MOBILE SWITCHING

CENTRES

Till the year 2010, All the MSCs of Punjab were running on Windows NT platform with software version R12.0. From time to time MSCs software needs to get upgraded from older version to current version i.e R13.0 which in turns provide enhancement in certain features.

The R13.0 upgrade is targeted to provide new crbt. The R13.0 upgrade in all MSCs is targeted to provide the customer with new

feature known as MOBILE NUMBER PORTABILITY. The R13.0 upgrade increased the traffic handling capacity of msc.

2. MOBILE NUMBER PORTABILITY Mobile Number Portability (MNP) basically is a process that allows the

customer to keep their mobile number irrespective of who their network operator is. So, if they switch between operators, they don’t have to go to the trouble of advising all their friends/family/colleagues that their number has changed – it stays the same.

3. TECHNICAL DETAILS

The R13.0 upgrade is done making one node of MSC redundant and other as Prime.

While R13.0 software upgrade is fed to the primary node, all the call routing is undertaken by the other active node.

When the other node is fed to the upgrade the redundant node is made active and the call routing gets switched to the other node.

4. TESTING AND IMPLEMENTATION

After all the up gradation of MSC is done, then the MSC is tested whether all the calls, messages are being routed.

In order to provide the Mobile number portability feature, a pre-testing phase was undertaken by Ericsson in November followed by a 2nd testing phase in January.

Removing all the flaws from the system, the Mobile Number Portability scheme is ready and improved by R13.0 up gradation.

THANKSTHANKS