GSM

1
GSM

• TCOM Overview
• Group Presentation
• David
• Mostafa Dasha
• Manohar Nikkam

2
Agenda

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

3
History

• Europe 1991
• North America 1995

4
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

5
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

6
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

7
Global Subscriber base - GSM Leading the Pack
8
Industry Analyst Projections

• By the year 2003, one billion GSM customers
  worldwide predicted.

9
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.

10
North American GSM Equipment Manufacturers

• Siemens
• Motorola
• Lucent technologies
• Nortel networks
• Nokia
• Ericsson

11
Smart Card

• SIM Subscriber Information Module
• Holds
• Subscribers 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

12
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

13
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

14
Advantages of GSM

• Total system specifications
• Advanced services functionality
• Voice quality
• Nationwide roaming
• Secure communications

15
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

16
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

17
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

18
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

19
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.

20
GSM Architecture
21
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

22
GSM Coverage Map
23
3G Evolutions Paths for 2G Technologies
24
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.

25
References

• www.gsmworld.com
• www.gsm-pcs.org

26
Thank You !