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 !