Seminar on

BY:-NITISH TANWAR

SUMMER TRAININGFrom

BSNL

• Introduction• History• GSM• Summary• Quarry

Introduction of BSNL• BSNL stands for BHARAT SANCHAR NIGAM

LIMITED.• It is India’s largest and oldest communication

service provider.• It had a customer base of 95 million as of

june2011.• It is an Indian state owned-owned

telecommunication company

Market share of BSNL

Introduction

• GSM stands for global system for mobile communication

• It was developed as replacement of 1G

• GSM is the standardization group establish in1982

History

• It was developed by group special mobile (founded 1982) which was an initiative of CEPT (conference of European Post and Telecommunication ).

• Under ETSI( European Telecommunication Standards Institute), GSM is named as “Global System for Mobile Communication “ in 1989.

• Today many provider all over the world use GSM (more than 135 countries in Asia, Africa, Europe, Australia, America.

• More than 1300 million subscribers in world and 45 million subscriber in India.

GSM in world

GSM in India

GSM-Service

• Tele – service• Bearer service• Supplementary service

GSM Architecture

Mobile station (MS)

Mobile station (MS)

• A mobile station is the unit in the hands of a subscriber.• It communicates to BST through air interface.• Mobile station includes mobile equipment and the

subscriber identity module (SIM).

Base station subsystem (BSS)It consist of one or more Base Transceiver Station (BTS) and Base Station Controller (BSC).

Mobile switching center

Network and switching subsystem (NSS)

The network subsystem provides the link between the cellular network and the Public Switched Telecommunication Networks (PSTN).It is mainly supported by four database:

• Home Location Register (HLR) Database• Visitor Location Register (VLR) Database• Authentication Center (Auc) Database• Equipment Identity Register (EIR)

Database

HLR: - The HLR stores information , both permanent and temporary, about each of the subscriber that belong to it.

VLR: - The location is determined by the VLR into which the subscriber is entered.

AuC: - This is used for authentication of the system.

EIR: - It keeps track of the type of equipment that exists at the mobile station.

Summary

So we can say that our daily routine is dependent on the communication technique like that GSM, CDMA, Telecom etc.

THANK YOU

Quarry