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Global System for Mobile Communications The Global System for Mobile Communications.

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Presentation on theme: "Global System for Mobile Communications The Global System for Mobile Communications."— Presentation transcript:

1 Global System for Mobile Communications The Global System for Mobile Communications

2 GSMGSM Standard for mobile phonesStandard for mobile phones 2 billion people2 billion people 212 countries212 countries The Global System for Mobile Communications

3 What is GSM ? cellular networkcellular network immediate vicinityimmediate vicinity ubiquityubiquity Digital call qualityDigital call quality The Global System for Mobile Communications

4 History 1970 : Bell1970 : Bell 1980 : marketing opening1980 : marketing opening 1991 : GSM1991 : GSM 1994 : 1.3 million subscribers1994 : 1.3 million subscribers 1997 : 100 countries Now : (standard) The Global System for Mobile Communications

5 Different frequencies 4 different frequencies4 different frequencies 900 Mhz900 Mhz 1800 Mhz1800 Mhz USUS –850 Mhz –1900 Mhz Rarer 400 & 450 Mhz (Scandinavia)Rarer 400 & 450 Mhz (Scandinavia) The Global System for Mobile Communications

6 Transmission power 2 watts in GSM850/9002 watts in GSM850/900 1 watt in GSM1800/19001 watt in GSM1800/1900 The Global System for Mobile Communications

7 Core technology Mobile Station (MS)Mobile Station (MS) Mobile Equipment (ME)Mobile Equipment (ME) Subscriber Identity Module (SIM)Subscriber Identity Module (SIM) International Mobile Equipment Identity (IMEI)International Mobile Equipment Identity (IMEI) International Mobile Subscriber Identity (IMSI)International Mobile Subscriber Identity (IMSI) So MS = ME + SIMSo MS = ME + SIM The Global System for Mobile Communications

8 Security moderate level of security shared-secret cryptography The Global System for Mobile Communications

9 Operator FranceFrance –SFR –Orange –Bouygues UKUK –MobileWorld –Fresh Mobile Mobile virtual network operatorMobile virtual network operator –Virgin –Debitel The Global System for Mobile Communications

10 Evolution 1G: First generation1G: First generation 2G: SMS, MMS, GRPS2G: SMS, MMS, GRPS 3G: Video, UMTS3G: Video, UMTS The Global System for Mobile Communications

11 Futur Somes evolutionsSomes evolutions The Global System for Mobile Communications


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