Global System for Mobile Communication
Mobile Communications Chapter 4: Wireless Telecommunication Systems slides by Jochen Schiller with modifications by Emmanuel Agu
Market q GSM q q
Overview q Services q Sub-systems q Components
Prof. Dr.-Ing. Jochen Schiller, http://www.jochenschiller.de/ MC SS05 4.1
Mobile phone subscribers worldwide
1600
approx. 1.7 bn
1400
1200
Subscribers [million]
GSM total TDMA total CDMA total 800 PDC total Analogue total 600 W-CDMA Total wireless Prediction (1998) 400
1000
200
0 1996 1997 1998 1999 2000 2001 2002 2003 2004 year
Prof. Dr.-Ing. Jochen Schiller, http://www.jochenschiller.de/
MC SS05
4.2
GSM: Overview
GSM
q q q q
q q q q
formerly: Groupe Spéciale Mobile (founded 1982) now: Global System for Mobile Communication Pan-European standard (ETSI, European Telecommunications Standardisation Institute) simultaneous introduction of essential services in three phases (1991, 1994, 1996) by the European telecommunication administrations (Germany: D1 and D2) è seamless roaming within Europe possible today many providers all over the world use GSM (more than 200 countries in Asia, Africa, Europe, Australia, America) more than 1.2 billion subscribers in more than 630 networks more than 75% of all digital mobile phones use GSM (74% total) over 200 million SMS per month in Germany, > 550 billion/year worldwide (> 10% of the revenues for many operators) [be aware: these are only rough numbers…]
Prof. Dr.-Ing. Jochen Schiller, http://www.jochenschiller.de/
MC SS05
4.3
Performance characteristics of GSM (wrt. analog sys.)
Communication
q
mobile, wireless communication; voice and data services international access, chip-card enables use of access points of different providers one number, the network handles localization better frequency efficiency, smaller cells, more customers per cell high audio quality and reliability for wireless, uninterrupted phone calls at higher speeds (e.g., from cars, trains)
Market q GSM q q
Overview q Services q Sub-systems q Components
Prof. Dr.-Ing. Jochen Schiller, http://www.jochenschiller.de/ MC SS05 4.1
Mobile phone subscribers worldwide
1600
approx. 1.7 bn
1400
1200
Subscribers [million]
GSM total TDMA total CDMA total 800 PDC total Analogue total 600 W-CDMA Total wireless Prediction (1998) 400
1000
200
0 1996 1997 1998 1999 2000 2001 2002 2003 2004 year
Prof. Dr.-Ing. Jochen Schiller, http://www.jochenschiller.de/
MC SS05
4.2
GSM: Overview
GSM
q q q q
q q q q
formerly: Groupe Spéciale Mobile (founded 1982) now: Global System for Mobile Communication Pan-European standard (ETSI, European Telecommunications Standardisation Institute) simultaneous introduction of essential services in three phases (1991, 1994, 1996) by the European telecommunication administrations (Germany: D1 and D2) è seamless roaming within Europe possible today many providers all over the world use GSM (more than 200 countries in Asia, Africa, Europe, Australia, America) more than 1.2 billion subscribers in more than 630 networks more than 75% of all digital mobile phones use GSM (74% total) over 200 million SMS per month in Germany, > 550 billion/year worldwide (> 10% of the revenues for many operators) [be aware: these are only rough numbers…]
Prof. Dr.-Ing. Jochen Schiller, http://www.jochenschiller.de/
MC SS05
4.3
Performance characteristics of GSM (wrt. analog sys.)
Communication
q
mobile, wireless communication; voice and data services international access, chip-card enables use of access points of different providers one number, the network handles localization better frequency efficiency, smaller cells, more customers per cell high audio quality and reliability for wireless, uninterrupted phone calls at higher speeds (e.g., from cars, trains)