GSM

TCOM OverviewGroup Presentation

DavidMostafa DashaManohar Nikkam

Agenda

History What is GSM? Growth of GSM Smart Card Coverage Map 3G Evolution path for 2G Technologies References

History Europe – 1991 North America – 1995

What is GSM ?

Global System Mobile Communications

Digital technology GSM provides

Integrated voice mail High speed data, fax Paging and Short Message Services (SMS)

GSM is a 2G technology

GSM Frequencies GSM400

450.4 - 457.6 MHz paired with 460.4 - 467.6 MHz or 478.8 - 486 MHz paired with 488.8 - 496 MHz

GSM900 880 - 915 MHz paired with 925 - 960 MHz

GSM1800 1710 - 1785 MHz paired with 1805 - 1880 MHz

GSM1900 1850 - 1910 MHz paired with 1930 - 1990 MHz

GSM in North America (As of End 1Q

2001) North American customers: 10.5 Million U.S. States with commercial GSM service: 48 Canadian Provinces with commercial

service: 6 North American Cities with commercial GSM

service: 6,500 Employees: 14,000 Total U.S. Licensed POPS: 260 Million Covered POPS in active markets to date:

181 Million

Global Subscriber base - GSM Leading the Pack

CDMA

14%

PDC

10%

TDMA

10%

GSM

66%

67.9 m47.7 m

336 m

50.2 m

GSM is in more countries than McDonalds: 137 countries

Industry Analyst Projections By the year 2003, one billion GSM

customers worldwide predicted.

North American GSM Alliance Members

Airadigm communications, inc

Cingular wireless Conestoga wireless company Cook Inlet VoiceStream PCS DIGIPH PCS Iowa wireless services LP Microcell

telecommunications inc NPI wireless

Powertel, Inc. SOL Communications Telemetrix Technologies TWS, Inc. VoiceStream Wireless Corp. Wireless 2000 PCS.

North American GSM Equipment Manufacturers

Siemens Motorola Lucent technologies Nortel networks Nokia Ericsson

Smart Card SIM – Subscriber Information Module Holds

Subscriber’s personal information Phone settings Phone numbers Personal security key Data for handset to function Missed calls Voice mail notifications etc.

Allows roaming with other GSM operators around the world

Formats of Smart Card Functionally identical Two formats

Resembles small chip - semi-permanently placed inside handset

Similar to credit card - used in phones equipped with a slot for SIM

Advantages of Smart Card Prevent

Cloning fraud Eavesdropping

If smart card is stolen or lost, just call the operator and operator will deactivate the card

Advantages of GSM Total system specifications Advanced services functionality Voice quality Nationwide roaming Secure communications

Total System Specifications Developed through technological

cooperation between standard committees, operators and equipment manufacturers

“open interface” standard Equipment from multiple vendors can

co-exist on the same network

Advanced Services GSM operators can offer

Integrated voice High speed data, fax Short Messaging Services

Intelligent Network (IN) functionality Call forwarding Abbreviated dialing Restrictions on incoming and outgoing calls Call handling based on location or time of the

day

Voice Quality GSM vocoder provides best digital

wireless voice quality Development of Advanced

Multirate Vocoder (AMR) Adopted as industry standard for 3G

W-CDMA networks Voice quality competitive with wire

line service

Nationwide Roaming GSM is pioneer in global roaming

Customers from a wireless carrier in one country to make or receive calls on another company's network in another country as well as at home

Secure Communications Smart cards Secure communications

100% digital Provide authentication

Checks validity of each call Make sure smart card is active Subscription is current

Provide encryption Guarantees confidentiality of voice and data calls

Personal Safety Mobile phones have become an important tool for our

every day lives and play a key role in safeguarding our personal safety.

GSM Architecture

MS

BTS

BTS

BTS

BTS

BTS

BTS

MS

Abis Interface

BSC

BSC

MSC

PSTN

MSTN

ISDN

DataNetworksHLR VLR

AUC OSS

EIR

A Interface Public InterfaceUm Interface

Terminology MS – Mobile Station BTS – Base Transceiver Station BSC – Base Station Controller EIR – Equipment Identity Register AUC – Authentication Center OSS – Operational Subsystem MSC – Mobile Services Switching Center HLR – Home Location Register VLR – Visitor Location Register

GSM Coverage Map

GSM Coverage Map

3G Evolutions Paths for 2G Technologies

Why TDMA operators are choosing GSM path to 3G? GSM is the most popular and

dominant 2G technology GSM technology path

(GPRS/EDGE/WCDMA) will become the most widely five continents.

References www.gsmworld.com www.gsm-pcs.org

Thank You !Thank You !