• Explain the relationship between HSDPA and UMTS
• Describe the benefits of HSDPA.
• Explain the HSDPA technical enhancements.
• Explain packet flows in HSDPA.
• Recognise the migration issues involved with HSDPA.

HSDPA training course contents

UMTS review
UMTS architecture, components, interfaces, protocols, W-CDMA, standards, 3GPPr5, 3GPPr6, evolution to HSDPA.

HSDPA basics
What is HSDPA, key features, system capacities, data rates, delays. Key concepts: Adaptive modulation and coding (AMC), QPSK, 16QAM, HARQ, MAC-hs, multiplexing, subframes.

HSDPA channels
Logical, transport, physical channels, dedicated vs. shared channels, HS-PDSCH, HS-SCCH, HS-DPCCH, code multiplexing.

MAC-hs
Controlling HS-DSCH, flow control, buffering, priority queues, packet scheduling, fast packet scheduling, Selecting modulation and coding. HARQ: Packet retransmissions, Incremental redundancy, comparison with ARQ, TFRC.

HSDPA migration
HSDPA in the Radio Access Network (RAN), reuse of existing UMTS components, changes required, Impact on Iub/Iur interfaces, new and modified NBAP procedures, backwards compatibility.

Packet flows
Packet data session setup, simultaneous voice and data, QoS, TCP flow control, WCDMA packet scheduler, mobility procedures.

HSDPA phase 2 (3GPP r6)
Antenna array techniques, beamforming techniques, Multiple Input Multiple Output (MIMO). Phase 3 possibilities (OFDM air interface).