UMTS Air Interface

This course provides a comprehensive and detailed explanation of the UMTS Air Interface. In so doing, the architecture of the radio interface, 6 channel structures, the CDMA physical layer, the protocols, procedures and operation will all be discussed. For a complete picture, the course also includes focus on enhancements to the air interface through HSPA.
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Section 1 - The UMTS Air Interface
Section 2 - UMTS Structure and Channels
Section 3 - UMTS Physical Layer
Section 4 - UMTS Physical Channels
Section 5 - UMTS Radio Resource Control
Section 6 - UMTS Operational Procedures
Section 7 - UMTS Mobility and Interworking

Topic areas covered include:

  • Frequency Bands:
    • ITU Regions.
    • Mobile Frequencies.
  • UMTS Bands.
  • CDMA Basics:
    • Codes.
    • User Channel.
    • Spreading and De-spreading.
    • Code Requirements.
  • 4 Modulation Techniques and Coding:
    • Basic Modulation Techniques.
    • UMTS Modulation.
    • Adaptive Modulation and Coding.
  • Cell Planning for UMTS:
    • UMTS Cells and Sectors.
    • Scrambling Codes.
    • Cell Footprint.
    • Adjusting a Cell to Provide Coverage.
    • Frequency Layers.

Topic areas covered include:

  • UMTS Air Interface Architecture:
    • The Non Access Stratum.
    • The Access Stratum.
    • UMTS Channels.
  • UMTS Channel Types.
  • Logical Channel Architecture:
    • Logical Channels - Control.
    • Logical Channels - Traffic.
    • MBMS Channels.
  • Transport Channel Architecture:
    • UMTS Transport Channels.
  • Physical Channels:
    • Downlink Physical Channels.
    • Uplink Physical Channels.
  • Channel Mapping:
    • Logical to Transport Mapping.
    • Downlink Transport to Physical Channel Mapping.
    • FDD Uplink Transport to Physical Channel Mapping.

Topic areas covered include:

  • UMTS Spread Spectrum:
    • Channel Rates.
    • Spreading.
    • Direct Sequence Spread Spectrum.
    • De-spreading.
    • UMTS Code.
  • Synchronization Codes:
    • P-SCH and S-SCH.
  • Scrambling Codes:
    • Downlink Scrambling Codes.
    • Uplink Scrambling Codes.
  • Spreading Codes:
    • OVSF Codes.
    • Code Allocation.
    • Static Codes.
    • Processing Gain.
  • Basic DSSS System:
    • Transmission.
    • Reception.
    • Rake Receiver.
  • Uplink Code Processing:
    • Dedicated Uplink Channels.
    • Common Uplink Channels.
  • Downlink Code Processing:
    • Channel Combining.
  • Frame Timing:
    • Node B Timing.
    • Cell Timing.
    • UE Timing.

Topic areas covered include:

  • Downlink Physical Channels:
    • CPICH.
    • CPICH Measurements.
    • Example CPICH Measurements.
    • Primary Common Control Physical Channel:
      • P-CCPCH.
    • Primary and Secondary Synchronization Channel:
      • P-SCH and S-SCH.
    • S-CCPCH.
    • DPCH.
    • PICH.
  • Uplink Physical Channels:
    • DPCH.
    • PRACH:
      • AICH.
    • Physical Channel Timing
  • Compressed Mode:
    • Transmission Gap Position.
    • Compressed Mode Pattern Parameters.

Topic areas covered include:

  • RRC Functions:
    • RRC Architecture.
    • RRC Procedures.
  • Radio Bearers.
  • Idle Mode Procedures:
    • Broadcast System Information.
    • System Information Blocks.
    • Paging.
  • Connected Mode:
    • Identities.
    • RRC Connection.
    • Direct Transfer.
    • Paging.
    • UE Capability.
    • Security.
    • Radio Bearer Procedures.

Topic areas covered include:

  • UMTS Initial Procedures:
    • PLMN Selection.
    • Cell Selection.
    • UMTS Attach.
    • Initial Direct Transfer.
  • Power Control:
    • Uplink Power Control.
    • Downlink Power Control.
  • Circuit Switched Operation:
    • Radio Bearer Setup.
    • Speech Transport Format Combinations.
    • RRC Connection Release.
  • Packet Switched Operation:
    • Activating the Packet Switched RAB.
    • Packet Switched RAB.
    • Transport Format Combination for Packet Data.
    • Volume Triggers.
    • Data Sub-states.

Topic areas covered include:

  • Idle Mode Mobility:
    • Cell Reselection.
    • Cell Reselection Criteria.
  • Connected Mode Mobility:
    • Periodic Measurements.
    • Event Measurements.
    • Intra-Frequency Measurement Reporting.
    • Measurement Control.
    • Measurement Report.
  • Soft Handovers:
    • Rake Receiver.
    • Rake Receiver in Soft Handover.
    • Soft Handover Regions.
    • Soft Handover Triggers.
    • Active Set Update.
  • Hard Handover
  • Common State Mobility:
    • Cell Update Procedure.
    • URA Update Procedure.
  • Interworking with GERAN:
    • Inter-RAT Mobility Messages.
    • Inter-RAT Measurements.

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