A basic presentation on 3G evolution and its basic architecture. This presentation isn't final and will be updated time to time.

1. 3G Evolution
3G Overview
BY: M Fahad Irshad
Rev 1.0

10. Standardization Organizations of 3G

18. Comparison Among 3G Modes

23. What is 3G Mobile System
1. Broadband Service
2. Packet Based Transmission
3. Transmission of text, digitized voice, video at data rate
higher than 2Mbps
4. Consistent set of services to mobile computer and phone
users wherever they are located in the world.

24. UMTS Network
 It consists of
 UMTS UTRAN ( UMTS Terrestrial Radio Access Network)
 WCDMA and FDD are used here
 Core Network

25. Spread Spectrum System
 A kind of modulation system in which the
modulated (spread spectrum) signal bandwidth
is much greater than the message signal
bandwidth.
 The spectral spreading is performed by a code
that is independent of the message signal. The
same code is used at receiver to de-spread the
received signal and to recover the message
signal.

26. Advantages of Spread Spectrum System
 It is Secure, difficult to intercept
 A large number of codes can support a large number of
users
 As a large bandwidth is used the system is less prone to
distortion
 Resistant to jamming
 Asynchronous multiple access technology

27. Different Spread Spectrum System
 Direct Sequence Spread Spectrum
 Frequency Hoping
 Hybrid System

29. Why WCDMA And Its Protocol Architecture
 WCDMA is a step further in the CDMA technology. It uses a
5 MHz wide radio signal and a chip rate of 3.84 Mcps,
which is about three times higher than the chip rate of
CDMA2000 (1.22 Mcps)
 Higher spectrum efficiency thanks to improved trunking
efficiency (i.e. a better statistical averaging)
 Higher QoS

30.  Three separate channels concepts in the UTRA: logical,
transport, and physical channels.
 Logical channels define what type of data is transferred.
 Transport channels define how and with which type of
characteristics the data is transferred by the physical
layer.
 Physical data define the exact physical characteristics of
the radio channel