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  1. 1. SK Ahsan
  2. 2. Introduction History Services Applications SpecificationsFuture SK Ahsan
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  4. 4. GSM Stands for Global System for MobileCommunicationIt is a second generation cellular standarddeveloped to cater voice services and datadelivery using digital modulation. SK Ahsan
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  6. 6. GSM Developed by Group Special Mobile (founded1982) which was an initiative of CEPT (Conference ofEuropean Post and Telecommunication).Aim : to replace the incompatible analog systemPresently the responsibility of GSM standardizationresides with special mobile group under ETSI (European telecommunication Standards Institute )Full set of specifications phase-I became available in1990 .Under ETSI, GSM is named as “ Global System forMobile communication”. SK Ahsan
  7. 7. Today Many Providers all over the world using GSM. GSM is used by over 3 billion people across more than 212 countries.There are 40 million Subscribers of GSM are there in Pakistan. SK Ahsan
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  10. 10. • Telecommunication services that enable voice communication via mobile phones• Offered services- Mobile telephony- Emergency calling SK Ahsan
  11. 11. Include various data services for information transfer between GSM and other networks like PSTN, ISDN etc at rates from 300 to 9600 bps Short Message Service (SMS)up to 160 character alphanumeric data transmission to/from the mobile terminalUnified Messaging Services(UMS)Group 3 faxVoice mailboxElectronic mail SK Ahsan
  12. 12. Call related services :Call Waiting- Notification of an incoming call while on the handsetCall Hold- Put a caller on hold to take another callCall Barring- All calls, outgoing calls, or incoming callsCall Forwarding- Calls can be sent to various numbers defined by the userMulti Party Call Conferencing - Link multiple calls togetherCLIP – Caller line identification presentationCLIR – Caller line identification restriction SK Ahsan
  13. 13. Carrier Separation : 200 KhzDuplex Distance : 45 MhzNo. of RF carriers : 124Access Method : TDMA/FDMAModulation Method : GMSKModulation data rate: 270.833 Kbps SK Ahsan
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  15. 15. Mobile telephony GSM-RTelemetry System Fleet management Automatic meter reading Toll Collection Remote control and fault Reporting of DG sets Value Added Services SK Ahsan
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  17. 17.  Capacity increases Reduced RF transmission power and longer battery life International roaming capability Better security against fraud (through terminal validation and user authentication). Encryption capability for information security and privacy. Compatibility with ISDN,leading to wider range of services SK Ahsan
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  19. 19. 2nd Generation GSM -9.6 Kbps (data rate)2.5 Generation ( Future of GSM) HSCSD (High Speed circuit Switched data) Data rate : 76.8 Kbps (9.6 x 8 kbps)GPRS (General Packet Radio service) Data rate: 14.4 - 115.2 KbpsEDGE (Enhanced data rate for GSM Evolution) Data rate: 547.2 Kbps (max)3rd Generation WCDMA(Wide band CDMA) Data rate : 0.348 – 2.0 Mbps SK Ahsan
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