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Jérémy Fréchard RT221

Mobile telephone systems

By Jérémy Fréchard

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Summary :- General principle- Historic- The first french mobile telephone system : Radiocom

2000- The french mobile telephone systems : - The mobile telephone systems in the world- Conclusion

Jérémy Fréchard RT221

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General principle :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)  

Jérémy Fréchard RT221

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General principle : 

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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

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General principle : 

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The handover :

A frame gsm, where a handover is realised

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General principle : 

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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.

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Historic :

1982 : Network 1G, Radiocom 20001992 : Network 2G, GSM2000 : Network 2.5G, GPRS2005: Network 2.75G, EDGE2003 : Network 3G, UMTS2006 : Network 3.5G, HSDPA2012 : Network 3.9G, LTE20?? : Network 4G, LTE-A

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The first french mobile telephone system :

Radiocom 2000 :

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

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The french mobile telephone systems :

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Category Name Date Frequency Technology Bandwidth1G Radiocom

20001982 400 MHz ??? No data

2G GSM 1992 900 – 1800 MHz

??? No data

2,5G GPRS 2000 900 – 1800 MHz

??? 54 kb/s

2,75g EDGE 2003 890-915 MHz ??? 384 kb/s

3G UMTS 2005 1,9 et 2,2 GHz

??? 1,920 Mb/s

3,5G HSDPA 2006 2 GHz ??? 3,6 à 7,2 Mb/s

3,9G LTE 2012 800-900Mhz et 2,6 GHz

??? 326 Mb/s

4G LTE-A 20?? 2,6 GHz ??? 1Gb/s

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An analysis frame gsm :Service demand :

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An analysis frame gsm :Authentication request :

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An analysis frame gsm : Encryption and numbering :

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An analysis frame gsm : of the alarm at unhooking :

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L’analyse de trame GSM: The end of call :

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Mobile telephone systems in world :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)

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Conclusion :

Jérémy Fréchard RT221

What does the future hold?

Thanks for your attention !

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Conclusion :

Jérémy Fréchard RT221

What does the future hold?

Thanks for your attention !