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 )
IMT 2000 Vision • Data Rates up-to 2 Mbps – for Indoor Environment • Global Seamless Roaming • Enhanced Security Performance • Integration of Satellite and Terrestrial Systems
IMT Technology ITU has finally narrowed down technology options to the following five :
IMT -DS IMT -MC IMT-TC IMT -SC IMT-FT
(Direct Spread) : (Multi Carrier) : ( Time Code) : ( Single Carrier ) : (Frequency Time) :
IMT-2000 Data Rate Requirements… To meet the High Speed Data requirements 3G system must support: 144 kbps Data for High Speed Vehicular Environment. 384 kbps Data for Low Speed Vehicular Environment. 2 Mbps Data for Stationary Environment
IMT 2000 Spectrum • IMT 2000 Core Band ( FDD Mode – Paired Frequencies) : Mobile to BTS (UP-LINK)
- 1920 to 1980 MHz
BTS to Mobile (DOWN -LINK) - 2110 to 2170 MHz • IMT 2000 TDD Mode unpaired band : 1885 to 1920 MHz 2010 to 2025 MHz
Key Requirements of 3G Services Improved system capacity Backward compatibility with 2G Systems Multimedia Support
Key Requirements of 3G Services High speed Packet Data Services Data Rates • up-to 2 Mbps – for Fixed or Indoor Environments • up-to 384 kbps – for pedestrian or urban environments • up-to 144 kbps – for wide area mobile environments
3G Standard : The choice is CDMA In 1999 ITU narrowed down on 5 technologies for IMT2000, 3 of which are based on CDMA technology : CDMA 2000 1x, WCDMA ( UMTS ) TD-SCDMA
What 3G mean to Customers Access to the mobile Internet and Messaging in all forms Email, MMS, Instant Messaging • Always-on connectivity receive voice calls in data mode • Fast data speeds Meaningful access to corporate data • Powerful, easy to use devices
WCDMA (Wide Band – Code Division Multiple Access)
It is the air –interface technology for the UMTS systems
Why WCDMA …. • WCDMA for high speed data access up to 384 Kbps - 2 Mbps • Demand for high Speed Data Access • Streaming • Video on Demand • Video Telephony – Data Revenue is becoming significant
• Operators World wide have shown inclination to introduce WCDMA
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