Gsm

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Gsm

  1. 1. SK Ahsan
  2. 2. Introduction History Services Applications SpecificationsFuture SK Ahsan
  3. 3. SK Ahsan
  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
  5. 5. SK Ahsan
  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
  8. 8. SK Ahsan
  9. 9. SK Ahsan
  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
  18. 18. SK Ahsan
  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
  20. 20. SK Ahsan

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