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IMT 2000, CDMA 2000 1 x And Future Trends
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IMT 2000, CDMA 2000 1 x And Future Trends

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  1. IMT 2000, CDMA 2000 1 xAnd Future Trends

  2. IMT 2000 objective. Brief Outline • IMT 2000 Technological Options • Migration Paths. • CDMA 2000 1x.

  3. MOBILE COMMUNICATION • 1946- 1960s 1980s 1990s 2000s • Appeared 1G 2G 3G • Analog Digital Digital • Multi Multi Unified Standard Standard Standard Terrestrial Terrestrial Terr. & Sat

  4. MOBILE COMMUNICATION THIRD GENERATION (3 G ) STANDARD INTERNATIONAL MOBILE TELECOM 2000. ( IMT-2000) IMT  A FUTURE STANDARD IN WHICH A SINGLE INEXPENSIVE MOBILE TERMINAL CAN TRUELY PROVIDE COMMUNICATIONS ANY TIME AND ANY WHERE

  5. IMT-2000 VISION • Common Spectrum Worldwide ( 1.8 – 2.2 GHz band ). • Multiple Radio Environments ( Cellular,, cordless, satellite) ). • Wide Range of Telecommunication Services ( Voice, Data, • Multi-media, Internet ). • Flexible Radio Bearer for Increased Spectrum Efficiency. • Data Rates up-to 2 Mbps – for Indoor Environment. • Global Seamless Roaming. • Enhanced Security Performance. • Integration of Satellite and Terrestrial Systems.

  6. Key Requirements of 3G Services • Improved system capacity. • Backward compatibility with second generation ( 2G ) systems. • Multimedia support. • High speed Packet data services. • Data Rates up-to 2 Mbps – for fixed or Indoor Environments. • Data Rates up-to 384 kbps – for pedestrian or urban Environments. • Data Rates up-to 144 kbps – for wide area mobile Environments.

  7. EVOLUTION TO IMT-2000/3G IMT-2000 CPABLE SYSTEMS GPRS EDGE GSM PDC WCDMA CdmaOne Cdma 2000 TDMA IS-136 TDMA/ GPRS TDMA/ EDGE 3G TODAY 2G 2000 EVOLVED 2G 19.2 Kbps 115-384 Kbps 0.384-2 Mbps 64-115 Kbps

  8. Cdma One Network BTS BSC MSC IWF PSTN Terminal IP Backbone WWW VPN Enterprise Network

  9. New Software 01010 BTS BSC MSC PDSN IWF PSTN 01010 Software Upgrade New Software 01010 Cdma2000 1x Evolution Channel card upgrade New Terminal New packet data router Software Upgrade IP Backbone WWW VPN Enterprise Network

  10. New Terminology in CDMA2000 Spreading Rate 1 ( 1x ). • Spreading Rate 3 ( 3x ). • Transmit Diversity. • Radio Configuration.

  11. Key Features Of CDMA2000 Different Radio Configuration (RC’s) for different radio environments. • Radio Configuration (RC’s) define Rate Set, Spreading Rate, Channel Coding ( Turbo or Convolutional ), Channel Coding rate, Modulation, Transmit Diversity for Forward or Reverse traffic channel. • RC 1 through RC 9 on the FL. ( RC 1 through RC 5 in 1x ) • RC 1 through RC 6 on the RL. ( RC1 through RC 3 in 1x )

  12. Key Features Of CDMA2000 • Variable length Walsh Codes 4 to 128 for variable data rates. • Pilot in reverse link. • Transmit Diversity. • Transmit Diversity is an optional feature that improves the performance in certain radio environments by transmitting forward signal on multiple antennas.

  13. Spreading Rate 1 and Spreading Rate 3 Spreading Rate 1 • Also called 1x. • Both forward and reverse channel use single direct sequence spread carrier with a chip rate of 1.2288 Mcps. Spreading Rate 3 • Also called 3x or MC ( Multi Carrier ). • Forward channels use three direct sequence spread carriers with a chip rate of 1.2288 Mcps. • Reverse channels use a single direct sequence spread carrier with a chip rate of 3.6864 Mcps.

  14. Advantages Of CDMA2000 1x Enhanced Capacity – 38 users/Sector/FA. • Enhanced data rates upto 153 Kbps in Release A. It can go up- to 307 Kbps in Release B. • Still higher data rates up-to 2.4 Mbps with 1x EV-DO.

  15. Commercial Systems CDMA 2000 1x Release A are available. Current Status Of CDMA2000 1x • Technical Specification for CDMA 2000 1x Release B are under finalization stages. • Currently out of total 26m 3G subscribers world over 25.5m are on CDMA 2000 1x. • Some 5-6 operators are having CDMA 2000 1x network. Major operators are Sprint, Verizon in USA and Monet Telecom in South Korea.

  16. Evolution of CDMA Networks Evolution to 3G – The Carrier’s Choice CDMA2000 1xEV-DO Data only 2.4 Mbps RF backward compatible CDMA IS-95A IS-95B CDMA2000 1x Voice, 14.4k Voice, 64k Nearly Doubles Voice, 307k, RF backward compatible EDGE GPRS GSM(Europe) 100k WCDMA Voice, 9.6k Data only 10-60k Voice, 128k/384k 1995 1999 2000 2001 2002 2003 2004