UMTS in 3 x 3 Hours - Part 1:
Access Technology & Air Interface

The UMTS Architecture

The Way to UMTS
Design Targets
The IMT 2000 Family
International Programs, UMTS – FDD, UMTS – TDD, Frequency Spectrum
UMTS Network Architecture
Release 1999, Network Elements, Interfaces
UTRAN (UMTS Terrestrial Radio Access Network) Architecture
Architectur, Interfaces, Node B, RNC (Radio Network Controller)
Major Changes from GSM to UMTS
Macrodiversity, Rake Receiver, Handovers, Cell Breathing, Adaptive Multirate Coding
UMTS Bearer Concept and User Equipment
UMTS Bearer, Radio Access Bearer, Radio Bearer, Types of Mobile Equipment, Terminal Operation Modes

Comparison of Access Techniques
FDMA, TDMA, CDMA, Hybrid
Properties of Spread Spectrum Systems
Interception / Privacy, Interference Rejection
Direct Sequence Spread Spectrum (DS-SS)
Direct Sequence Technique, Spreading Code, Cross Correlation, Correlation Receiver, Scrambling Code, Auto Correlation
The Data Transmission Path
Chip Rate, Channelization vs Scrambling, Codes and Data Rate

UTRA Radio Interface Architecture
Signaling Radio Bearers (SRB), User-Plane Radio Bearers, Channel Concepts in UMTS
Logical and Transport Channels
Types of Logical and Transport Channels, Common and Dedicated Traffic Channels
Data Transport on Transport Channels
Transport Blocks and Formats, Format Indicators Transport Channel Multiplexing
Physical Layer Data Handling
Channel Coding Schemes (Speech / Data / Signaling), Rate Matching, Interleaving, Scrambling and Channelization
Physical Channels in UTRAN
The Physical Layer, Physical Channels, Indicator Channels, Transport Channel Mapping, Frame Structures, Support of Variable Bit Rates and Service Multiplexing
Spreading and Modulation
I/Q-Code Multiplexed QPSK, Complex-Scrambling, Time-Multiplexed QPSK

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