3G

3G is the third generation of mobile phone standards and technology. 3G technologies enable network operators to offer users a wider range of more advanced services while achieving greater network capacity through improved spectral efficiency. Services include wide-area wireless voice chatting, Viedeo Calls, and broadband wireless data, all in a mobile environment. Additional features also include HSPA data transmission capabilities able to deliver speeds up to 14.4Mbit/s on the downlink and 5.8Mbit/s on the uplink. Now most of the service providers are providing 3Gs and most phones are supporting it.



The first pre-commercial 3G network was launched by NTT DoCoMo in Japan branded FOMA , in May 2001 on a pre-release of W CDMA GA3Y technology. The first commercial launch of 3G was also by NTT DoCoMo in Japan on October 1, 2001.

The ITU has not provided a clear definition of the speeds users can expect from 3G equipment or providers.a minimum speed of 2Mbit/s for stationary or walking users, and 348 [sic] kbit/s in a moving vehicle.It is often suggested by industry sources that 3G can be expected to provide 384 kbit/s at or below pedestrian speeds, but only 128 kbit/s in a moving car. EDGE is a part of 3 G standard.

3G networks offer a greater degree of security than 2G predecessors. By allowing the UE to authenticate the network it is attaching to, the user can be sure the network is the intended one and not an impersonator. 3G networks use the KASUMI block crypto instead of the older A5/1 stream cipher.