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UMTS

UMTS. Amit Mahajan. Digital Cellular Technology. UMTS. The Digital Cellular Technology. Global System For Mobile Communication. More Than 110 Million Subscribers More Than 200 Countries Combination Of TDMA & FDMA Current Data Rate 9.6kbps By 2000 2 Mbps By 2010 200 Mbps .

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UMTS

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  1. UMTS Amit Mahajan Digital Cellular Technology

  2. UMTS The Digital Cellular Technology

  3. Global System For Mobile Communication • More Than 110 Million Subscribers • More Than 200 Countries • Combination Of TDMA & FDMA • Current Data Rate 9.6kbps • By 2000 2 Mbps • By 2010 200 Mbps

  4. What Is GSM ??? • Digital Cellular Radio Network • Data ,Fax, e-mails, Internet, S.M.S • Uses R.F. • 3 Frequency Ranges 900,1800,1900 MHz. • Wireless • Roaming Facility (one phone #)

  5. When & Why it Started ?? • 1982 Group Special Mobile • 1989 ETSI • Phase 1 1990 • Commercial Launch Mid 1991 • Compatibility • Limited Market • Economies Of Scale

  6. Evolution Of GSMPhase 1 • Features: • Call forwarding • Call Barring ( incoming & outgoing) • Global Roaming

  7. Phase 2 • Features: • SMS • Multi party calling • Call holding, Cell Broadcasting • Call waiting, Calling party identity • Advise of charge • Data services • Fax services

  8. Phase 2 + • Features: • Available in 1998 • Packet Switching at 64Kbps • SIM enhancements • OMCR upgradation • OMCS upgradation

  9. Terminologies in GSM N/W

  10. Architecture HLR VLR BSC BTS PSTN MSC SIM BSC MS EIR AUC BTS Mobile Station Network Subsystem Base Station Subsystem

  11. Terminologies • MS ( Mobile Handset) • BTS (Base Transreceiver Station) • BSC (Base Station Controller) • MSC (Mobile Switching Center) • EIR (Equipment Identity Register) • HLR (Home Location Register) • VLR (Visitor Location Register)

  12. Mobile Station • MS ( Mobile Handset) • SIM (Subsciber Identity Module) • IMSI • (Country code+N/W code+Sub. No.) • TMSI • IMEI

  13. Mobile Station • MS ( Mobile Handset) • SIM (Subsciber Identity Module) • Battery • Antenna

  14. S I M Card Subscriber Identity Module

  15. Mobile Station • IMEI: • International Mobile Equipment Identity • Unique Number • 15 digits ( TAC, FAC)

  16. Mobile Call Set UP • Power on • BCCH,RACH,SDCCH,PCH,AGCH,TCH • Authentication • Channel allocation • Ciphering mode • FACCH, SACCH for Handoffs

  17. Base Station Subsystem • BTS • Cells • MS communicates with BTS • Power control • Sectors • Different Antenna types & orientations • BCCH, NBCCH, Channel Allocation

  18. BTS Base Transreceive Station

  19. What’s Inside BTS??? Base Transreceive Station

  20. Microcell City Future BTS

  21. Base Station Subsystem • BSC • 10-40 BTS connected to BSC • Frequency Hopping • Handovers • Inter or Intra BTS • Inter or Intra BSC • Inter or Intra MSC

  22. Network Subsystem • MSC ( Heart Of GSM ) • HLR • VLR • AUC • EIR • BSC connected to MSC • Call routing

  23. Email, Fax GSM Phone

  24. Coverage & Power

  25. Coverage & Power • 35 Kms • Scenarios: • Urban • Semiurban • Rural • 20 Watt, 8 Watt, 2 Watt, 5 Watt • Interference

  26. Coverage In USA

  27. 180 deg. 60 deg. 300 deg. Sectored BTS

  28. Frequency Planning • Available channels • Coverage objectives • Exclusive Channels • Frequency Reuse: • 4 Cell reuse • 7 Cell reuse • One, Two or Three sector site

  29. Different Cells & Repeaters • Micro cells • Pico cells • Indoor repeaters • Outdoor repeaters

  30. Types Of Repeaters • Channel Select: • 2 Watt (33dbm) • Bandselect: • 200mwatt (23dbm) • Low power repeater: • 2 mwatt (13dbm)

  31. Comparison of 3 Digital Technologies • GSM: TDMA • 100 million Subscriber • 900 Mhz, 1.8Ghz, 1.9 Ghz • Channel B/W 200 Khz • Good voice quality • Data rate 9.6 Kbps till 1997/98 • Currently 38.4Kbps,115Kbps by 2000

  32. Comparison of 3 Digital Technologies • CDMA: • 3 Million Subscriber(1997) • 800 Mhz, 1.9 Ghz • Channel Bandwidth 1250 Khz • Very high voice quality • Data rate 9.6 Kbps - 14.4 Kbps • Roaming Limited, Strong potential

  33. Comparison of 3 Digital Technologies • D-AMPS: • 4 million Subscriber(1997) • 800 Mhz , 1.8Ghz • Channel B/W 300 Khz • Acceptable voice quality • Data rate 9.6 Kbps in 1998

  34. Comparison of GSM & PCS • GSM: • 1) 900 Mhz, 1800 Mhz • 2) Europe,Asia,France,Germany,UK • PCS(Personal Communication Services) • 1) 1900 Mhz • 2) USA, Canada

  35. Future GSM

  36. Third Generation GSM • UMTS • W-CDMA + Hybrid TD-CDMA • Phase 1 • 2 Mbps ( 2002/2003) • Phase 2 • 100 Mbps (2010) • Frequency range: 2 Ghz

  37. Dual-band & tri-Band phones • Dual - band: • Both in 900-1800 Mhz n/w of Europe • Also in 900-1900 Mhz n/w in USA • Ericsson, Motorola, Siemens • Tri-band: • All the three bands • TDMA - CDMA compatible phones

  38. Satellite phones • Irridium

  39. Packet Switched • 3rd generation networks • Channel occupancy • Channel utilization • Frame relay

  40. Thank You !!! Amit Mahajan Sharmila Pradhan

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