1. Jérémy Fréchard RT221 1 By Jérémy Fréchard

2. - General principle - Historic - The first french mobile telephone system : Radiocom 2000 - The french mobile telephone systems : - The mobile telephone systems in the world - Conclusion 2 Jérémy Fréchard RT221

3. The working of a cellular network : The french territory is split in area, called cells, from a hundred meters to several kilometers For all cells, there is a emitter, called BTS (Base Transceiver Station) 3 Jérémy Fréchard RT221

4. 4 Roaming : In standby mode : the mobile listens the canal BCCH In communication : he send a rapport of the puissant for the network If the signal is too low, the handover is used

5. 5 Jérémy Fréchard RT221 The handover : A frame gsm, where a handover is realised

6. 6 Jérémy Fréchard RT221 The security : The sim card, used by all provider, is the better solution for authenticate a customer. With a algorithm, the mobile and sim calculates a random signature. da111

7. 1982 : Network 1G, Radiocom 2000 1992 : Network 2G, GSM 2000 : Network 2.5G, GPRS 2005: Network 2.75G, EDGE 2003 : Network 3G, UMTS 2006 : Network 3.5G, HSDPA 2012 : Network 3.9G, LTE 20?? : Network 4G, LTE-A 7 Jérémy Fréchard RT221

8. 8 It's the first french mobile, mainly used in cars because he were too big.

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15. Europe : NMT (1G Belarus), DCS (2G Luxembourg) America : iDEN (Argentina, Brazil), CDMA- 2000 (3G Canada), 1xEV-DO (3G Canada), UMA (1G USA), TDMA Asia Pacific : PDC (2G Japan), FOMA (3G Japan), PHS (Japan), AMPS Africa : D-AMPS (2G Congo), AMPS (1G Ghana) Middle East : iDEN (Saudi Arabia, Israel and Jordan) 15 Jérémy Fréchard RT221

16. 16 Jérémy Fréchard RT221 What does the future hold? Thanks for your attention !

17. 17 Jérémy Fréchard RT221 What does the future hold? Thanks for your attention !